CN115374573B

CN115374573B - Method and device for manufacturing motor rotor

Info

Publication number: CN115374573B
Application number: CN202211291815.0A
Authority: CN
Inventors: 周剑; 叶海滨; 刘霞; 刘蕾; 朱月萍; 李�荣
Original assignee: Jiangsu Dazhong Technology Co ltd
Current assignee: Jiangsu Dazhong Technology Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-03-24
Anticipated expiration: 2042-10-21
Also published as: CN115374573A

Abstract

The invention provides a method and a device for manufacturing a motor rotor.A first end ring outer circle radius and an inner circle radius of a cast aluminum rotor are calculated to obtain a first rotating speed of a centrifuge, and the first rotating speed and a preset centrifuge offset rotating speed are calculated to generate a centrifuge rated rotating speed interval; if the actual rotating speed of the centrifugal machine is within the rated rotating speed interval of the centrifugal machine, generating a first adjusting value by the actual rotating speed of the centrifugal machine and the first rotating speed ratio of the centrifugal machine; acquiring the first liquid level height and the second liquid level height, and calculating with the bottom area of the pouring cup to obtain an aluminum liquid pouring variable; calculating a preset time period and an aluminum liquid pouring variable to obtain a first pouring speed, and adjusting the first pouring speed by a first adjusting value to obtain a second pouring speed; calculating the initial liquid level height of the aluminum liquid, the first liquid level height and the bottom area of the pouring cup to obtain the poured amount of the aluminum liquid, and calculating the preset poured amount of the aluminum liquid of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid; and calculating the amount of the aluminum liquid to be poured and the second pouring speed to obtain the time to be poured, and casting the rotor according to the time to be poured.

Description

Method and device for manufacturing motor rotor

Technical Field

The invention relates to the technical field of data processing, in particular to a method and a device for manufacturing a motor rotor.

Background

The rotor of the motor is a part which rotates in the motor and is an important constituent part of the motor. In recent years, as new energy vehicles have been developed at a high speed, cage induction motors mounted on new energy vehicles have been widely used, and therefore cast aluminum rotors constituting the cage induction motors have also been used on a large scale. The cast aluminum rotor has the advantages of light weight, high power/mass density, small rotational inertia and larger starting torque release of the induction motor. Meanwhile, the low melting point of aluminum enables the cast aluminum rotor to be mature in manufacturing process and low in manufacturing cost, which is one of the reasons widely adopted.

In the prior art, a plurality of motor production enterprises adopt a centrifugal cast aluminum manufacturing process to produce cast aluminum rotors. Cast aluminum rotors are typically cast using a horizontal centrifugal caster in the manufacture of centrifugal cast aluminum. The casting process generally comprises the steps of smelting aluminum metal, manufacturing a casting mold, injecting the aluminum metal into a rotating aluminum casting mold after the aluminum metal is molten into aluminum liquid, and filling the aluminum casting mold with a cavity under the action of centrifugal force and solidifying the aluminum casting mold. However, in the casting process, the casting speed cannot be adjusted in real time according to the dynamic change of the rotating speed of the centrifuge, and the casting time of the molten aluminum to be cast cannot be predicted in real time according to the amount of the molten aluminum to be cast.

Therefore, a technical scheme is needed urgently, the pouring speed can be adjusted in real time according to the dynamic change of the rotating speed of the centrifuge in the manufacturing process of the cast aluminum rotor, so that pouring can be finished for a long time according to the adjusted pouring speed, and workers are reminded.

Disclosure of Invention

The embodiment of the invention provides a motor rotor manufacturing method and a motor rotor manufacturing device, which can adjust the pouring speed in real time according to the dynamic change of the rotating speed of a centrifugal machine in the manufacturing process of a cast aluminum rotor, are beneficial to discharging gas in aluminum liquid and non-aluminum impurities lighter than aluminum, and ensure the improvement of the finished product quality of the cast aluminum rotor to a certain extent. Therefore, pouring can be finished according to the prediction of the pouring speed after adjustment, workers are reminded, and the workers can make corresponding adjustment according to actual conditions.

In a first aspect of the embodiments of the present invention, a method for manufacturing a rotor of an electric motor is provided, including:

acquiring the excircle radius and the inner circle radius of a first end ring of the cast aluminum rotor, calculating the excircle radius and the inner circle radius of the first end ring to obtain a first rotating speed of a centrifuge, and calculating according to the first rotating speed of the centrifuge and a preset offset rotating speed of the centrifuge to generate a rated rotating speed interval of the centrifuge;

acquiring the actual rotating speed of a centrifuge in the manufacturing process of a rotor, and comparing the actual rotating speed of the centrifuge with the first rotating speed of the centrifuge to generate a first adjusting value if the actual rotating speed of the centrifuge is within the rated rotating speed interval of the centrifuge;

respectively acquiring a first liquid level height of the aluminum liquid at the current moment and a second liquid level height of the aluminum liquid at the previous moment which is away from the current moment by a preset time period according to a pouring infrared thermal imaging detection system, and calculating the first liquid level height, the second liquid level height and the bottom area of a pouring cup to obtain an aluminum liquid pouring variable;

calculating the preset time period and the aluminum liquid pouring variable to obtain a first pouring speed, and adjusting the first pouring speed according to the first adjusting value to obtain a second pouring speed;

acquiring the initial liquid level height of the aluminum liquid, calculating the initial liquid level height of the aluminum liquid, the first liquid level height and the bottom area of a pouring cup to obtain the poured amount of the aluminum liquid, acquiring the preset pouring amount of the aluminum liquid of a rotor, and calculating the preset pouring amount of the aluminum liquid of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid;

and calculating the amount of the aluminum liquid to be poured and the second pouring speed to obtain the time to be poured.

Alternatively, in one possible implementation form of the first aspect,

after acquiring the excircle radius and the inner circle radius of the first end ring, processing the excircle radius and the inner circle radius of the first end ring and then performing operation to obtain a first rotating speed of the centrifuge;

acquiring a preset offset rotating speed of the centrifuge, and performing forward offset operation and reverse offset operation on a first rotating speed of the centrifuge according to the offset rotating speed of the preset centrifuge to obtain a rated rotating speed interval of the centrifuge;

the rated rotating speed interval of the centrifuge is calculated by the following formula,

wherein,

for the maximum value of the rated speed interval of the centrifuge>

Is the outer circle radius of the first end ring, and>

is the radius of the inner circle of the first end ring, and>

for a first speed gradient parameter of the centrifuge>

For a predetermined offset rotational speed of the centrifuge>

For offsetting the speed gradient parameter>

Is the minimum value of the rated rotating speed interval of the centrifugal machine.

Alternatively, in one possible implementation form of the first aspect,

acquiring the actual rotating speed of the centrifuge at the current moment in the rotor manufacturing process, and comparing the actual rotating speed of the centrifuge with the rated rotating speed interval of the centrifuge;

if the actual rotating speed of the centrifuge is within the rated rotating speed interval of the centrifuge, dividing the actual rotating speed of the centrifuge by the first rotating speed of the centrifuge to generate a first adjusting value;

the first adjustment value is calculated by the following formula,

wherein,

is the outer circle radius of the first end ring, and>

is the radius of the inner circle of the first end ring, and>

for a first speed gradient parameter of the centrifuge>

Is the first adjusted value, is greater than or equal to>

Is the actual rotational speed of the centrifuge>

Is the first rotational speed of the centrifuge>

To adjust the impact factor.

Alternatively, in one possible implementation form of the first aspect,

subtracting the first liquid level height from the second liquid level height of the aluminum liquid to obtain a liquid level change height;

obtaining the bottom area of a pouring cup, and multiplying the bottom area of the pouring cup by the liquid level change height to obtain an aluminum liquid pouring variable;

the pouring variable of the aluminum liquid is calculated by the following formula,

wherein,

casting variable for aluminum liquid, and selecting whether or not>

Is the bottom area of the watering cup and is used for keeping the water>

Is at a second liquid level>

Is the first liquid level height.

Alternatively, in one possible implementation form of the first aspect,

dividing the aluminum liquid pouring variable by the preset time period and then processing to obtain a first pouring speed;

multiplying the first adjusting value by the first pouring speed to obtain a second pouring speed;

the second pouring speed is calculated by the following formula,

wherein,

for the second pouring speed, is selected>

Casting variable for aluminum liquid, and selecting whether or not>

For a predetermined period of time, is>

For influencing the casting speed>

Is the first adjustment value.

Alternatively, in one possible implementation form of the first aspect,

obtaining the initial liquid level height of the aluminum liquid, and subtracting the first liquid level height from the initial liquid level height of the aluminum liquid to obtain the poured liquid level height of the aluminum liquid;

multiplying the height of the poured liquid level of the aluminum liquid by the bottom area of the pouring cup to obtain the poured amount of the aluminum liquid;

obtaining the preset aluminum liquid pouring amount of the rotor, and subtracting the poured amount of the aluminum liquid from the preset aluminum liquid pouring amount of the rotor to obtain the to-be-poured amount of the aluminum liquid;

the amount of aluminum liquid to be poured is calculated by the following formula,

wherein,

the amount of the aluminum liquid to be poured is judged>

Presetting the aluminum liquid pouring amount for the rotor, and then>

The initial liquid level height of the aluminum liquid is selected as the->

Is at a first liquid level, is greater than or equal to>

Is the bottom area of the pouring cup.

Alternatively, in one possible implementation form of the first aspect,

dividing the to-be-poured amount of the aluminum liquid by the second pouring speed to obtain to-be-poured time;

the time to be poured is calculated by the following formula,

wherein,

for the time to be poured, is>

The amount of the aluminum liquid to be poured is judged>

For the second pouring speed, is selected>

Is a pouring time influencing factor;

and pouring the amount of the molten aluminum to be poured into an aluminum casting mold according to the time to be poured to cast the aluminum casting rotor.

Alternatively, in one possible implementation form of the first aspect,

acquiring a preset standard parameter interval of the aluminum casting mold and a corresponding standard sprue depth, acquiring actual parameters of the aluminum casting mold, and comparing the actual parameters of the aluminum casting mold with the standard parameter interval of the aluminum casting mold;

if the actual parameters of the cast aluminum die are within the standard parameter interval of the cast aluminum die, the depth of the standard sprue is not adjusted;

if the actual parameter of the aluminum casting mold is smaller than the standard parameter interval of the aluminum casting mold, reducing and adjusting the depth of the standard gate according to a first adjustment value, and shifting a pouring trolley influencing the depth of the standard gate to the outside of the aluminum casting mold;

and if the actual parameters of the aluminum casting mold are larger than the standard parameter interval of the aluminum casting mold, increasing and adjusting the standard pouring gate depth according to the first adjustment value, and shifting the pouring trolley influencing the standard pouring gate depth into the aluminum casting mold.

Alternatively, in one possible implementation form of the first aspect,

acquiring a first distance scale value of the pouring trolley on the pouring track corresponding to the depth of the standard pouring gate;

if the actual parameter of the cast aluminum die is smaller than the standard parameter interval of the cast aluminum die, comparing the actual parameter of the cast aluminum die with the minimum value of the standard parameter interval of the cast aluminum die to obtain a reverse deviation value, calculating the first distance scale value and the reverse deviation value, and adjusting according to the first adjustment value to obtain a second distance scale value;

if the actual parameters of the cast aluminum die are larger than the standard parameter interval of the cast aluminum die, comparing the actual parameters of the cast aluminum die with the maximum value of the standard parameter interval of the cast aluminum die to obtain a forward deviation value, calculating the first distance scale value and the forward deviation value, and adjusting according to the first adjustment value to obtain a third distance scale value;

the second distance-scale value and the third distance-scale value are calculated by the following formulas,

wherein,

for the actual parameters of the cast aluminum mold>

For the minimum value of the standard parameter interval of the cast aluminum mold, is selected>

For the maximum value of the standard parameter interval of the cast aluminum mold>

Is a second distance scale value>

Is a first distance scale value>

Is the first adjusted value, is greater than or equal to>

For adjusting the normalization value, is>

Is a third distance scale value;

and determining the distance scale value after the pouring trolley deviates towards the inside or the outside of the aluminum casting mould according to the second distance scale value or the third distance scale value.

In a second aspect of the embodiments of the present invention, there is provided an apparatus for manufacturing a rotor of an electric motor, including:

the acquisition module is used for acquiring the outer circle radius and the inner circle radius of a first end ring of the cast aluminum rotor, calculating the outer circle radius and the inner circle radius of the first end ring to obtain a first rotating speed of the centrifuge, and calculating according to the first rotating speed of the centrifuge and the offset rotating speed of the preset centrifuge to generate a rated rotating speed interval of the centrifuge;

the comparison module is used for acquiring the actual rotating speed of the centrifuge in the rotor manufacturing process, and comparing the actual rotating speed of the centrifuge with the first rotating speed of the centrifuge to generate a first adjustment value if the actual rotating speed of the centrifuge is within the rated rotating speed interval of the centrifuge;

the first operation module is used for respectively acquiring a first liquid level height of the aluminum liquid at the current moment and a second liquid level height of the aluminum liquid at the previous moment which is away from the current moment by a preset time period according to the pouring infrared thermal imaging detection system, and operating the first liquid level height, the second liquid level height and the bottom area of the pouring cup to obtain an aluminum liquid pouring variable;

the adjusting module is used for calculating the preset time period and the aluminum liquid pouring variable to obtain a first pouring speed, and adjusting the first pouring speed according to the first adjusting value to obtain a second pouring speed;

the second operation module is used for acquiring the initial liquid level height of the aluminum liquid, operating the initial liquid level height of the aluminum liquid, the first liquid level height and the bottom area of the pouring cup to obtain the poured amount of the aluminum liquid, acquiring the preset pouring amount of the aluminum liquid of the rotor, and operating the preset pouring amount of the aluminum liquid of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid;

and the pouring module is used for calculating the amount of the aluminum liquid to be poured and the second pouring speed to obtain the time to be poured.

In a third aspect of the embodiments of the present invention, a storage medium is provided, in which a computer program is stored, which, when being executed by a processor, is adapted to implement the method according to the first aspect of the present invention and various possible designs of the first aspect of the present invention.

According to the technical scheme provided by the invention, when the horizontal centrifugal casting machine is used for casting the cast aluminum rotor, the rotating speed required by the centrifuge during working is determined according to the size of the radius of the inner circle and the outer circle of the end ring in the cast aluminum die. And according to the actual rotational speed of the centrifuge when the rotor is being manufactured, judging whether the actual rotational speed accords with the normal working rotational speed of the centrifuge, and obtaining an adjusted value. And changing the pouring speed of the rotor which is not poured by the centrifuge to obtain a new pouring speed. And finally, predicting how long the cast aluminum rotor probably needs to be cast completely through the capacity of the aluminum liquid which is not cast completely and the new casting speed after the change. Therefore, the pouring speed is adjusted in real time according to the dynamic change of the rotating speed of the centrifuge, the gas in the aluminum liquid and non-aluminum impurities lighter than aluminum are discharged, and the improvement of the quality of the finished cast aluminum rotor product is ensured to a certain extent. The prediction of the pouring time can remind the staff, and the staff can make corresponding adjustment according to the actual situation.

According to the technical scheme provided by the invention, the rotating speed required by the operation of the centrifuge is obtained by calculating the inner and outer circle radii of the cast aluminum die end ring, and an adjustment value is obtained by calculating the required rotating speed and the actual rotating speed of the centrifuge, so that the subsequent real-time adjustment of the pouring speed of the aluminum liquid is facilitated. By pouring the infrared thermal imaging detection system, the collected height of the aluminum liquid at the moment and the height of the aluminum liquid before are calculated by using the processor to obtain the pouring amount of the aluminum liquid in a period of time which is shorter than the current period, and then a relatively accurate pouring speed at the moment can be obtained according to the pouring amount of the aluminum liquid in the period. The casting speed is adjusted in real time by the adjustment value obtained by the change of the rotating speed. The casting speed required for the rotor at the next moment, which is not yet cast, can be obtained. The amount of the left rotor which is not poured is obtained through the amount of the molten aluminum at the beginning and the poured amount. And calculating the pouring speed required at the next moment and the amount of the molten aluminum which is not poured completely, so as to obtain how long the rotor which is not poured completely needs to be poured completely. The pouring speed is adjusted in real time according to the dynamic change of the rotating speed of the centrifuge, so that pouring can be finished for a long time according to the prediction of the adjusted pouring speed, workers are reminded, the working efficiency of rotor production and manufacturing is improved, and the production quality of the rotor is improved.

According to the technical scheme provided by the invention, the pouring gate depth influencing the pouring quality is adjusted according to different size parameters of the aluminum casting mold. The depth of the pouring gate is controlled by the pouring gate trolley, so that the position of the pouring trolley can be adjusted according to different size parameters of the aluminum casting mould. Therefore, the position of the pouring trolley can be dynamically adjusted according to different rotating speeds corresponding to different size parameters of the cast aluminum die, so that the cast aluminum rotor has a proper pouring position in the pouring production process. The wall thickness of the finished product of the cast aluminum rotor is uniform, and no oxide inclusions are generated at two ends. The quality of the finished cast aluminum rotor is improved.

Drawings

FIG. 1 is a flow chart of a first embodiment of a method of manufacturing a rotor for an electric machine;

FIG. 2 is a flow chart of a second embodiment of a method of manufacturing a rotor for an electric machine;

fig. 3 is a schematic structural diagram of a motor rotor manufacturing device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprising a, B and C", "comprising a, B, C" means that all three of a, B, C are comprised, "comprising a, B or C" means comprising one of a, B, C, "comprising a, B and/or C" means comprising any 1 or any 2 or 3 of a, B, C.

It should be understood that in the present invention, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, and B can be determined from a. Determining B from a does not mean determining B from a alone, but may be determined from a and/or other information. And the matching of A and B means that the similarity of A and B is greater than or equal to a preset threshold value.

As used herein, the term "if" may be interpreted as "at \8230; …" or "in response to a determination" or "in response to a detection" depending on the context.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

The invention provides a method for manufacturing a motor rotor, which specifically comprises the following steps as shown in figure 1:

s1, acquiring the outer circle radius and the inner circle radius of a first end ring of a cast aluminum rotor, calculating the outer circle radius and the inner circle radius of the first end ring to obtain a first rotating speed of a centrifuge, and calculating according to the first rotating speed of the centrifuge and a preset offset rotating speed of the centrifuge to generate a rated rotating speed interval of the centrifuge;

according to the technical scheme provided by the invention, the cast aluminum rotor is cast by using a horizontal centrifugal casting machine in the manufacturing process of centrifugal cast aluminum. The casting process generally comprises the steps of smelting aluminum metal, manufacturing a casting mold, injecting the aluminum metal into a rotating aluminum casting mold after the aluminum metal is molten into aluminum liquid, and filling the aluminum casting mold with a cavity under the action of centrifugal force and solidifying the aluminum casting mold.

The horizontal centrifugal casting machine comprises a motor, a differential mechanism, a coupling, a bearing, a rear cover, a bushing, a metal mold and a front cover. The motor controls the centrifuge to rotate and is connected with the differential mechanism to adjust the rotating speed. The differential mechanism is connected with a coupling, the coupling is connected with one end of the bearing, and the coupling and the bearing are mainly used for connecting the casting mold to keep rotating under the action of centrifugal force. The casting mold comprises a metal casting mold, and other devices such as a lining, a front cover and a rear cover for fixing the metal casting mold, and the devices are used for ensuring that the metal casting mold is stably and efficiently cast in the casting process.

In the casting process of the horizontal centrifugal casting machine on the cast aluminum rotor, the rotating speed of the centrifugal machine directly influences the centrifugal force. The centrifugal force plays an important role in the forming of the cast aluminum rotor and the crystallization process of aluminum metal, and is beneficial to discharging gas and non-aluminum impurities lighter than aluminum in aluminum liquid, so that the quality of a finished cast aluminum rotor product is influenced. When the horizontal centrifugal casting machine is used for centrifugally casting aluminum, the rotating speed of the centrifugal machine is influenced by the size of an upper end ring of the cast aluminum rotor, and the end ring is a compression ring which forms a part of the cast aluminum rotor structure and is the end part of the cast aluminum rotor. Therefore, before the horizontal centrifugal casting machine casts the cast-aluminum rotor, the outer circular radius of the first end ring and the inner circular radius of the first end ring of the upper end ring of the cast-aluminum rotor need to be obtained according to the cast-aluminum die. And calculating the obtained outer circle radius of the first end ring and the obtained inner circle radius of the first end ring to obtain the first rotating speed of the centrifuge. In this case, the first rotation speed of the centrifuge is a rotation speed which is theoretically obtained by the outer radius of the first end ring of the upper end ring of the cast aluminum rotor and the inner radius of the first end ring of the upper end ring of the cast aluminum rotor, and is not an actual rotation speed during the operation of the centrifuge. And calculating the obtained first rotating speed of the centrifuge and the offset rotating speed of the preset centrifuge to generate a rated rotating speed interval of the centrifuge.

In one possible embodiment, the first setting manner of the preset deviation rotation speed of the centrifuge is that the processor is preset after counting according to the historical deviation rotation speed of the centrifuge in the horizontal centrifugal casting machine. For example, the cast aluminum rotors with different sizes have corresponding historical offset rotating speeds, all the historical offset rotating speeds of the cast aluminum rotors with different sizes are summed and averaged to obtain the preset centrifuge offset rotating speed corresponding to the cast aluminum rotor with each size, and when centrifugal cast aluminum needs to be performed on the cast aluminum rotors with different sizes, the processor calls the corresponding preset centrifuge offset rotating speed according to the corresponding size of the cast aluminum rotor.

In another possible embodiment, the second setting of the preset centrifuge offset rotational speed is preset by a human. In the actual process of centrifugal aluminum casting of the cast aluminum rotor by the horizontal centrifugal casting machine, the centrifugal machine may deviate in a general situation due to temperature or power and the like according to the first rotating speed of the centrifugal machine theoretically obtained by the outer circle radius of the first end ring and the inner circle radius of the first end ring, so that the preset centrifugal machine deviation rotating speed can be set in advance. The cast aluminum rotors with different sizes have a corresponding maximum value and a corresponding minimum value in a reasonable state in casting, so that the first rotating speed of the centrifuge is subjected to offset adjustment, and a centrifuge rated rotating speed interval is generated. The rated rotating speed interval of the centrifugal machine is a rotating speed interval when the centrifugal machine works at the state that the first rotating speed of the centrifugal machine is adjusted through the deviation of the deviation rotating speed of the preset centrifugal machine, and the centrifugal machine is most suitable for centrifugally casting aluminum on the cast aluminum rotor, and the cast aluminum rotor is centrifugally cast within the rated rotating speed interval of the centrifugal machine, so that the improvement of the finished product quality of the cast aluminum rotor is ensured to a certain extent.

In a possible embodiment, as shown in fig. 2, the step S1 specifically includes:

s1.1, after acquiring the excircle radius and the inner circle radius of a first end ring, processing the excircle radius and the inner circle radius of the first end ring and then calculating to obtain a first rotating speed of the centrifuge;

according to the technical scheme provided by the invention, the outer circle radius of the first end ring and the inner circle radius of the first end ring of the upper end ring of the cast-aluminum rotor are obtained according to the cast-aluminum die. It can be known that the obtained first end ring outer circle radius is divided by a difference value obtained by subtracting a value obtained by solving a cube from the first end ring outer circle radius and a value obtained by solving a cube from the first end ring inner circle radius, and the obtained first end ring outer circle radius is adjusted through a first centrifuge rotation speed gradient parameter after the squaring operation is performed, so that a first centrifuge rotation speed is obtained.

S1.2, acquiring a preset offset rotating speed of the centrifuge, and performing forward offset operation and reverse offset operation on a first rotating speed of the centrifuge according to the offset rotating speed of the centrifuge to obtain a rated rotating speed interval of the centrifuge;

according to the technical scheme provided by the invention, the preset offset rotating speed of the centrifuge is obtained, and the offset rotating speed of the centrifuge has the effect that in the actual process of carrying out centrifugal aluminum casting on the cast aluminum rotor by the horizontal centrifugal casting machine, the centrifuge can deviate approximately according to the first rotating speed of the centrifuge theoretically obtained according to the excircle radius of the first end ring and the inner circle radius of the first end ring under the ordinary condition because of the temperature, the power and the like. The preset centrifuge offset rotation speed is set in advance. And carrying out offset adjustment on the first rotating speed of the centrifugal machine. Thereby generating a rated rotating speed interval of the centrifuge. And performing forward offset adjustment on the first rotating speed of the centrifuge according to the offset rotating speed of the preset centrifuge, namely adding the offset rotating speed of the preset centrifuge on the basis of the first rotating speed of the centrifuge to obtain the maximum value of the rated rotating speed interval of the centrifuge. And carrying out reverse offset adjustment on the first rotating speed of the centrifuge according to the offset rotating speed of the centrifuge, namely subtracting the offset rotating speed of the centrifuge on the basis of the first rotating speed of the centrifuge to obtain the minimum value of the rated rotating speed interval of the centrifuge. And obtaining the rated rotating speed interval of the centrifuge according to the minimum value of the rated rotating speed interval of the centrifuge and the maximum value of the rated rotating speed interval of the centrifuge.

wherein,

for the maximum value of the rated speed interval of the centrifuge>

Is the outer circle radius of the first end ring, and>

is the radius of the inner circle of the first end ring, and>

for a first speed gradient parameter of the centrifuge>

For presetting an offset speed of the centrifuge>

For offsetting the speed gradient parameter>

Is the minimum value of the rated rotating speed interval of the centrifuge.

According to the technical scheme provided by the invention, the outer circle radius of the first end ring is adjusted

Cubed by the outer circle radius of the first end ring>

And the value cubed by the radius of the inner circle of the first end ring>

The subtracted difference->

Performs a subtraction->

After performing the square opening operation>

By means of the centrifuge a first speed gradient parameter->

Is adjusted to obtainThe centrifuge rotates at a first speed. The centrifuge first speed gradient parameter->

Is manually preset. Presetting a centrifuge offset speed->

By offsetting the speed gradient parameter->

Adjusted and then is->

In combination with a first rotation speed of the centrifuge>

After adding

Performing positive deviation adjustment to obtain the maximum value of the rated rotating speed interval of the centrifuge>

. Offset speed gradient parameter->

Is manually preset. Presetting offset rotating speed of centrifugal machine>

By offsetting the speed gradient parameter->

Adjusted and then is->

Based on the first rotational speed of the centrifuge>

After subtraction

Carrying out reverse offset adjustment to obtain the minimum value of the rated rotating speed interval of the centrifuge>

. Based on the minimum value of the rated rotating speed interval of the centrifuge>

And the maximum value of the rated rotating speed interval of the centrifugal machine>

Obtaining the rated rotating speed interval of the centrifuge>

。

S2, acquiring the actual rotating speed of the centrifuge in the rotor manufacturing process, and comparing the actual rotating speed of the centrifuge with the first rotating speed of the centrifuge to generate a first adjusting value if the actual rotating speed of the centrifuge is within the rated rotating speed interval of the centrifuge;

according to the technical scheme provided by the invention, the actual rotating speed of the centrifugal machine in the process of carrying out centrifugal aluminum casting on the aluminum casting rotor by the horizontal centrifugal casting machine is obtained through the rotating speed sensor, namely the actual rotating speed of the centrifugal machine in the working process at the current moment. Comparing the actual rotating speed of the centrifuge with the rated rotating speed interval of the centrifuge, and if the actual rotating speed of the centrifuge is in the rated rotating speed interval of the centrifuge, indicating that the centrifuge in the horizontal centrifugal casting machine works at the normal rotating speed at present, calculating the actual rotating speed of the centrifuge and the first rotating speed of the centrifuge at the moment to generate a first adjusting value. The first adjusting value is an adjusting value for adjusting the pouring speed of the aluminum liquid according to the ratio of the actual rotating speed of the centrifugal machine to the first rotating speed of the centrifugal machine. The first adjustment value is obtained, so that the dynamic adjustment of the molten aluminum pouring speed is conveniently carried out subsequently according to the change of the rotating speed of the centrifugal machine.

In a possible embodiment, the technical solution provided by the present invention, in step S2, specifically includes:

according to the technical scheme provided by the invention, the actual rotating speed of the centrifuge of the horizontal centrifugal casting machine in the process of carrying out centrifugal aluminum casting on the aluminum casting rotor is obtained, namely the actual rotating speed of the centrifuge in the working process at the current moment. The actual rotating speed of the centrifuge is compared with the rated rotating speed interval of the centrifuge, and the comparison has the function of judging whether the centrifuge works at the normal rotating speed in the actual work.

according to the technical scheme provided by the invention, the actual rotating speed of the centrifugal machine is compared with the rated rotating speed interval of the centrifugal machine, if the actual rotating speed of the centrifugal machine is within the rated rotating speed interval of the centrifugal machine, the fact that the centrifugal machine in the horizontal centrifugal casting machine works at the normal rotating speed currently is indicated, and at the moment, the actual rotating speed of the centrifugal machine is divided by the first rotating speed of the centrifugal machine to generate a first adjusting value.

The first adjustment value is calculated by the following formula,

wherein,

is the first rotational speed of the centrifuge>

Is the outer circle radius of the first end ring, and>

is the radius of the inner circle of the first end ring, and>

for a first spin gradient parameter of the centrifuge>

Is the first adjusted value, is greater than or equal to>

Is the actual rotational speed of the centrifuge>

To adjust the impact factor.

Cubed by the outer circle radius of the first end ring>

And the value cubed by the radius of the inner circle of the first end ring>

The subtracted difference->

Performs a subtraction->

After performing the square opening operation>

By means of the centrifuge a first speed gradient parameter->

Adjusting to obtain the first rotating speed of the centrifuge>

. The centrifuge first speed gradient parameter->

Is manually preset. Actual rotational speed of the centrifuge->

And the first adjustment value->

In direct proportion, if the actual rotational speed of the centrifuge is greater or less>

The greater the corresponding first adjustment value->

The larger. Otherwise if the actual rotational speed of the centrifuge is greater or less>

The smaller the corresponding first adjustment value->

The smaller. The adjustment influencing factor->

Is preset by a human.

S3, respectively acquiring a first liquid level height of the aluminum liquid at the current moment and a second liquid level height of the aluminum liquid at the previous moment which is away from the current moment by a preset time period according to a pouring infrared thermal imaging detection system, and calculating the first liquid level height, the second liquid level height and the bottom area of a pouring cup to obtain an aluminum liquid pouring variable;

according to the technical scheme provided by the invention, the pouring infrared thermal imaging detection system is a system for detecting the temperature and the liquid level height of aluminum liquid in a pouring cup in real time through an infrared thermal imaging technology according to an infrared thermal imager which is arranged on a pouring platform in advance. And respectively acquiring a first liquid level height of the aluminum liquid in the pouring cup at the current moment through a pouring infrared thermal imaging detection system, wherein the first liquid level height is the height of the liquid level of the aluminum liquid in the pouring cup at the current moment. And the second liquid level height of the previous moment is a preset time period away from the current moment, and the second liquid level height is the height of the liquid level of the aluminum liquid in the pouring cup at the previous moment. The preset time period is artificially preset, and the main effect of the preset time period is that if the liquid level height at the current moment is compared with the liquid level height at the initial moment, the liquid level descending height obtained by subtracting the liquid level heights at the two moments is possibly inaccurate by the casting speed obtained through calculation. Because the casting speed may be changed continuously, the initial casting speed and the casting speed at the current moment may have a large deviation. Therefore, a preset time period needs to be manually preset, and the value of the preset time period is usually not large and is close to the current time. And obtaining a previous time closer to the current time through a preset time period, and obtaining a second liquid level height of the previous time according to the pouring infrared thermal imaging detection system. For example, assuming that the current time is nine and thirty minutes and the preset time period is one minute, the previous time is nine and twenty-nine minutes, and the first liquid level height of nine and thirty minutes at the current time and the second liquid level height of twenty-nine minutes at the nine and twenty-nine minutes at the previous time can be obtained by pouring the infrared thermal imaging detection system. The pouring infrared thermal imaging detection system is in the prior art and can record the liquid level height at different moments. And obtaining the bottom area of the pouring cup, calculating the height of the first liquid level and the height of the second liquid level to obtain a liquid level difference value, and calculating the liquid level difference value and the bottom area of the pouring cup to obtain the pouring variable of the aluminum liquid in the pouring cup.

In a possible embodiment, the technical solution provided by the present invention, in step S3, specifically including:

according to the technical scheme provided by the invention, the liquid level change height is obtained by subtracting the acquired first liquid level height at the current moment from the second liquid level height at the previous moment acquired by the pouring infrared thermal imaging detection system. The liquid level change height has the function of facilitating the subsequent obtaining of corresponding aluminum liquid pouring variables according to the liquid level change height.

according to the technical scheme provided by the invention, the bottom area of a pouring cup for pouring molten aluminum is obtained, and the bottom area of the pouring cup is multiplied by the liquid level change height to obtain the molten aluminum pouring variable. And the aluminum liquid pouring variable is the volume of the poured aluminum liquid between the current time and the previous time which is away from the current time by a preset time period. The function of obtaining the aluminum liquid pouring variable is to facilitate obtaining the pouring speed at the current moment according to the aluminum liquid pouring variable subsequently.

wherein,

casting variable for aluminum liquid, and selecting whether or not>

Is the bottom area of the watering cup and is used for keeping the water>

Is at a second liquid level>

Is the first liquid level height.

The technical proposal provided by the invention is that the height of the second liquid level

Is higher than the first liquid level>

Subtracting the difference value

Is the liquid level change height. Change the liquid level to be higher or lower>

Is accumulated on the bottom of the watering cup>

Multiplication by multiplication

And the obtained product is the casting variable of the aluminum liquid>

。

S4, calculating the preset time period and the aluminum liquid pouring variable to obtain a first pouring speed, and adjusting the first pouring speed according to the first adjustment value to obtain a second pouring speed;

according to the technical scheme provided by the invention, the pouring variable of the poured aluminum liquid between the current time and the previous time which is separated from the current time by the preset time period is calculated with the preset time period which is manually preset, so that a first pouring speed is obtained, and the first pouring speed is the pouring speed of the pouring cup pouring the aluminum liquid into the centrifugal machine at the current time. And adjusting the first pouring speed according to a first adjusting value generated by the actual rotating speed of the centrifuge and the first rotating speed of the centrifuge to obtain a second pouring speed. And the second pouring speed is the pouring speed obtained by dynamically adjusting the pouring speed at the current moment after the rotating speed is changed according to the actual rotating speed of the centrifugal machine and the first rotating speed of the centrifugal machine.

In a possible embodiment, the technical solution provided by the present invention, in step S4, specifically including:

according to the technical scheme provided by the invention, the pouring variable of the poured aluminum liquid between the current time and the previous time which is separated from the current time by the preset time period is divided by the preset time period which is artificially preset, and the first pouring speed is obtained by adjusting the preset pouring speed influence factor, wherein the first pouring speed is the pouring speed of pouring the aluminum liquid into the centrifuge from the pouring cup at the current time.

according to the technical scheme provided by the invention, a first adjusting value generated according to the actual rotating speed of the centrifuge and the first rotating speed of the centrifuge is multiplied by the first pouring speed, and the product is the second pouring speed. And the second pouring speed is obtained by dynamically adjusting the pouring speed at the current moment after the rotating speed is changed according to the actual rotating speed of the centrifuge and the first rotating speed of the centrifuge.

The second pouring speed is calculated by the following formula,

wherein,

for the second pouring speed, is selected>

Casting variable for aluminum liquid, and selecting whether or not>

For a predetermined period of time, is>

For influencing the casting speed>

Is the first adjustment value.

The technical scheme provided by the invention is that the pouring variable of the aluminum liquid

And a predetermined time period>

Is divided by the ratio

Is the first casting speed. Combining the first pouring speed->

Influencing the factor by the casting speed>

Adjusted and compared with the first adjustment value->

Multiply to obtain a product->

For the second pouring speed->

. Pouring speed influencing factor->

Is preset by a human. The first adjustment value->

And a second pouring speed->

Is in direct proportion. If the actual rotational speed of the centrifuge is exceeded or undershot>

The greater the first adjustment value->

Greater corresponding casting speeds>

The larger. Otherwise, if the actual rotational speed of the centrifuge is greater or less>

The smaller the first adjustment value->

The smaller the corresponding pouring speed->

The smaller.

S5, obtaining the initial liquid level height of the aluminum liquid, calculating the initial liquid level height of the aluminum liquid, the first liquid level height and the bottom area of a pouring cup to obtain the poured amount of the aluminum liquid, obtaining the preset poured amount of the aluminum liquid of the rotor, and calculating the preset poured amount of the aluminum liquid of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid;

according to the technical scheme provided by the invention, the initial liquid level height of the aluminum liquid at the initial moment in the pouring cup is obtained through the pouring infrared thermal imaging detection system. And the initial liquid level height of the aluminum liquid is the height of the liquid level of the aluminum liquid in the pouring cup at the initial moment. And calculating the initial liquid level height of the aluminum liquid and the first liquid level height to obtain a liquid level height difference, and calculating the liquid level height difference and the bottom area of the pouring cup to obtain the poured amount of the aluminum liquid. The poured amount of the aluminum liquid is the poured volume of the aluminum liquid in the pouring cup at the current moment. And acquiring the preset aluminum liquid pouring amount of the rotor, wherein the preset aluminum liquid pouring amount is the preset aluminum liquid pouring amount for people according to the size of the cast aluminum die and the required amount of aluminum liquid for casting one cast aluminum rotor. It will be appreciated that the amount of molten aluminum in the tundish is such that not only one cast aluminum rotor can be poured, but a plurality of cast aluminum rotors can be poured simultaneously. Therefore, a rotor preset aluminum liquid pouring amount needs to be preset, so that real-time dynamic adjustment can be conveniently carried out subsequently. And calculating the preset aluminum liquid pouring amount of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid. The volume of the aluminum liquid to be poured is the volume of the aluminum liquid to be poured in the pouring cup when the pouring of one cast aluminum rotor is not finished at the current moment.

In a possible embodiment, the technical solution provided by the present invention, in step S5, specifically including:

according to the technical scheme provided by the invention, the initial liquid level height of the aluminum liquid at the initial moment in the pouring cup is obtained through the pouring infrared thermal imaging detection system. And the initial liquid level height of the aluminum liquid is the height of the liquid level of the aluminum liquid in the pouring cup at the initial moment. And subtracting the first liquid level height from the initial liquid level height of the aluminum liquid to obtain a difference value, namely the poured liquid level height of the aluminum liquid. And the height of the poured liquid level of the aluminum liquid is the height of the liquid level of the aluminum liquid poured in the pouring cup at the current moment.

according to the technical scheme provided by the invention, the height of the poured liquid level of the aluminum liquid is multiplied by the bottom area of the pouring cup, and the obtained product is the poured amount of the aluminum liquid. The poured amount of the aluminum liquid is the poured volume of the aluminum liquid in the pouring cup at the current moment.

according to the technical scheme provided by the invention, the preset aluminum liquid pouring amount is the preset aluminum liquid pouring amount for people according to the size of the cast aluminum die and the amount of aluminum liquid required for casting one cast aluminum rotor. It will be appreciated that the amount of molten aluminum in the tundish is such that not only one cast aluminum rotor can be poured, but a plurality of cast aluminum rotors can be poured simultaneously. Therefore, a rotor preset aluminum liquid pouring amount needs to be preset, so that real-time dynamic adjustment can be conveniently carried out subsequently. And subtracting the preset aluminum liquid pouring amount of the rotor from the poured amount of the aluminum liquid, wherein the obtained difference value is the aluminum liquid to-be-poured amount. The volume of the aluminum liquid to be poured is the volume of the aluminum liquid to be poured in the pouring cup when the pouring of one cast aluminum rotor is not finished at the current moment.

wherein,

the amount of the aluminum liquid to be poured is judged>

Presetting the aluminum liquid pouring amount for the rotor, and then>

The initial liquid level height of the aluminum liquid is selected as the->

Is at a first liquid level, is greater than or equal to>

Is the bottom area of the pouring cup.

The technical scheme provided by the invention is that the initial liquid level height of the aluminum liquid

Is higher than the first liquid level>

Is subtracted and the resulting difference->

For the height of the poured liquid level of the aluminum liquid, the height of the poured liquid level of the aluminum liquid is->

Multiply the bottom area of the watering cup->

And the resulting product->

The poured amount of the aluminum liquid. Pouring amount of preset aluminum liquid into the rotor>

Is poured with the aluminum liquid by the casting amount->

Subtracting the difference value

The amount of the aluminum liquid to be poured is greater or less>

。/>

And S6, calculating the to-be-poured amount of the aluminum liquid and the second pouring speed to obtain the to-be-poured time.

According to the technical scheme provided by the invention, the to-be-poured amount of the aluminum liquid obtained by subtracting the preset pouring amount of the aluminum liquid and the poured amount of the aluminum liquid of the rotor is calculated with the second pouring speed to obtain the to-be-poured time. The time to be poured is the time required for completing the pouring of all the volumes of the molten aluminum to be poured when one cast aluminum rotor is not poured yet at the current moment.

In a possible embodiment of the technical solution provided by the present invention, step S6 specifically includes:

according to the technical scheme provided by the invention, the to-be-cast amount of the aluminum liquid is divided by the second casting speed to obtain the to-be-cast time. The pouring time is the time required for completing the pouring of all the volume of the molten aluminum to be poured when the pouring of one cast aluminum rotor is not completed at the current moment.

The time to be poured is calculated by the following formula,

wherein,

for the time to be poured, is>

The amount of the aluminum liquid to be poured is judged>

For the second pouring speed, is selected>

Is a pouring time influencing factor;

according to the technical scheme provided by the invention, the amount of aluminum liquid to be poured is measured

Divided by the second pouring speed->

And influencing the factor by the pouring time>

Adjusting to obtain the time to be poured>

. Pouring time influencing factor->

Is preset by a human.

according to the technical scheme provided by the invention, the cast aluminum die is a die for manufacturing a cast aluminum rotor. The size of the cast aluminum rotor is different according to the size of the motor, so the cast aluminum molds for manufacturing the cast aluminum rotor are also divided into different sizes. Because the sizes of the aluminum casting molds are different, the extending depths of pouring gates for pouring aluminum liquid into the aluminum casting molds are different during pouring. Because the cast aluminum rotors have different sizes in the pouring process, the pouring gates extend into too much or too little, and the defects of the finished cast aluminum rotors can be caused by the improper positions of the cast aluminum rotors with high probability. For example, the thickness of the longitudinal wall is uneven, the part close to the gate is too thick, and the part far away from the gate is very thin, so that oxide inclusions are generated at two ends of the cast aluminum rotor during manufacturing.

It can be known that when a small cast aluminum rotor is manufactured, the corresponding rotation speed of the centrifuge can be relatively small in general, so that the depth of the sprue extending into the cast aluminum mold can be one third; when the standard-size cast aluminum rotor is manufactured, the corresponding rotating speed of the centrifuge can be relatively uniform under the general condition, so that the depth of the sprue extending into the cast aluminum mold can be one half; when a larger cast aluminum rotor is manufactured, the corresponding rotation speed of the centrifuge can be relatively larger in general, so that the depth of the sprue extending into the cast aluminum mold can be two thirds. The depth of the gate into the aluminum casting mold is one half, and is generally the standard gate depth. And the size parameters of the part of the aluminum casting mold have difference within a certain range. The size parameters of the part of aluminum casting molds meeting the standard gate depth are uniformly set as standard parameters, and an interval is preset to contain the part of aluminum casting molds meeting the standard gate depth, namely the standard parameter interval of the aluminum casting molds. The actual parameters of the cast aluminum die are parameters corresponding to the actual size of the cast aluminum rotor. The actual parameters of the cast aluminum mold are compared with the standard parameter intervals of the cast aluminum mold, so that the depth of the sprue can be conveniently adjusted and confirmed according to the comparison result, and the quality of the finished cast aluminum rotor product is ensured.

according to the technical scheme provided by the invention, if the actual cast aluminum die parameters of the cast aluminum rotor to be cast are in the standard cast aluminum die parameter interval, the condition that the cast aluminum rotor to be cast meets the standard sprue depth is shown, and the standard sprue depth is not required to be adjusted.

according to the technical scheme provided by the invention, if the actual parameter of the cast aluminum die of the cast aluminum rotor needing to be cast is smaller than the standard parameter interval of the cast aluminum die, the cast aluminum rotor needing to be cast is possibly smaller, and the corresponding rotating speed of a centrifuge is probably relatively smaller under the general condition when the smaller cast aluminum rotor is manufactured, so that the depth of the sprue penetrating into the cast aluminum die is possibly one third, and the depth of the standard sprue is required to be reduced and adjusted according to the first adjusting value generated by the rotating speed. And the pouring bogie affecting the standard gate depth is shifted to the outside of the aluminum casting mold. The pouring trolley is a trolley for driving the pouring gate to move forward or backward, directly influences the depth of the pouring gate extending into the aluminum casting mold and is a component of the pouring device of the horizontal centrifugal pouring machine. Therefore, the external deviation is that when the actual parameter of the cast aluminum mold of the cast aluminum rotor needing to be cast is smaller than the standard parameter interval of the cast aluminum mold, the casting trolley influencing the standard gate depth is pulled back towards the direction close to the inlet of the cast aluminum mold when the gate just extends into the cast aluminum mold, namely the casting trolley is deviated towards the position of about one third of the cast aluminum mold.

And if the actual parameters of the aluminum casting mold are larger than the standard parameter interval of the aluminum casting mold, increasing and adjusting the depth of the standard gate according to a first adjustment value, and shifting the pouring trolley influencing the depth of the standard gate into the aluminum casting mold.

According to the technical scheme provided by the invention, if the actual parameter of the cast aluminum die of the cast aluminum rotor to be cast is larger than the standard parameter interval of the cast aluminum die, the cast aluminum rotor to be cast is probably larger, and the corresponding rotating speed of the centrifuge is probably relatively larger under the general condition when the larger cast aluminum rotor is manufactured, so that the depth of the sprue extending into the cast aluminum die is probably two thirds, and the depth of the standard sprue is required to be increased and adjusted according to the first adjusting value generated by the rotating speed. And the pouring trolley influencing the standard pouring gate depth is deviated towards the interior of the aluminum casting mould. The pouring trolley is a trolley for driving the pouring gate to move forward or backward, directly influences the depth of the pouring gate extending into the aluminum casting mold and is a component of the pouring device of the horizontal centrifugal pouring machine. Therefore, the internal deviation is that when the actual parameter of the cast aluminum mold of the cast aluminum rotor needing to be cast is smaller than the standard parameter interval of the cast aluminum mold, the casting trolley influencing the standard sprue depth is pushed forward to the sprue staying at the standard sprue depth, namely, the internal deviation is carried out to the position about two thirds of the cast aluminum mold.

according to the technical scheme provided by the invention, the pouring trolley is generally fixed on a pouring track arranged below a pouring device of a horizontal centrifugal pouring machine. The casting track is generally provided with a plurality of scale values for representing the distance value of the forward or backward movement of the casting trolley, so as to reflect the corresponding sprue depth. The first distance scale value is a scale value corresponding to the pouring trolley corresponding to the standard gate depth on the pouring track. Typically, the gate car will be in the position of the first distance scale value with the gate in the position of the standard gate depth.

according to the technical scheme provided by the invention, if the actual parameter of the cast aluminum die is smaller than the standard parameter interval of the cast aluminum die, the actual parameter of the cast aluminum die is divided by the minimum value of the standard parameter interval of the cast aluminum die to obtain the reverse offset value. The reverse deviation value is a value deviated when the pouring trolley influences the depth of the standard pouring gate, and the direction from the position of a first distance scale value corresponding to the depth of the standard pouring gate to the position, close to the inlet of the aluminum casting die, of the pouring gate just extending into the aluminum casting die is the direction outside the aluminum casting die, and the pouring trolley is pulled back and pulled out. And calculating the first distance scale value and the reverse deviation value, and adjusting according to the first adjustment value to obtain a second distance scale value. And the second distance scale value is the corresponding distance scale value on the pouring track after the pouring trolley deviates to the outside of the aluminum casting mould.

If the actual parameter of the cast aluminum die is larger than the standard parameter interval of the cast aluminum die, comparing the actual parameter of the cast aluminum die with the maximum value of the standard parameter interval of the cast aluminum die to obtain a forward deviation value, calculating the first distance scale value and the forward deviation value, and adjusting according to the first adjustment value to obtain a third distance scale value;

according to the technical scheme provided by the invention, if the actual parameter of the cast aluminum die is greater than the standard parameter interval of the cast aluminum die, the actual parameter of the cast aluminum die is divided by the maximum value of the standard parameter interval of the cast aluminum die to obtain the forward deviation value. The forward deviation value is a value obtained by pushing a pouring gate forwards towards the inside of the aluminum casting mold from the position of a first distance scale value corresponding to the standard pouring gate depth, wherein the position of the first distance scale value is influenced by the forward deviation value. And calculating the first distance scale value and the reverse deviation value, and adjusting according to the first adjustment value to obtain a third distance scale value. And the third distance scale value is the corresponding distance scale value on the pouring track after the pouring trolley deflects towards the interior of the aluminum casting mould.

The second distance scale value and the third distance scale value are calculated by the following formulas,

wherein,

for actual parameters of cast aluminium moulds>

Is a second distance scale value>

Is a first distance scale value>

Is the first adjusted value>

For adjusting the normalization value, is>

Is a third distance scale value;

the technical scheme provided by the invention is that the actual parameters of the cast aluminum die

Divided by the minimum value of the standard parameter interval of the cast aluminum mould

Obtaining a reverse offset value->

Actual parameters of cast aluminum mold>

Divided by the maximum value of the standard parameter interval of the cast aluminum mould

Obtaining a positive offset value->

. Adjusting the normalization value->

Is preset by a human. When actual parameters of the aluminum casting mold

Is less than the standard parameter interval of the cast aluminum mold>

Then the normalization value is adjusted>

For a first adjustment value>

After normalization, the value is compared with a first distance scale value->

And a reverse offset value->

After the calculation, a second distance scale value is obtained>

. When the actual parameter of the cast aluminum mold is->

Is greater than the standard parameter interval of cast aluminum mold>

When, adjust the normalization value>

For the first adjustment value->

After normalization, the value is compared with a first distance scale value->

And a positive offset value>

After the calculation, a third distance scale value is obtained>

。

According to the technical scheme provided by the invention, the second distance scale value is the corresponding distance scale value on the pouring track after the pouring trolley deviates to the outside of the aluminum casting mould. And the third distance scale value is the corresponding distance scale value on the pouring track after the pouring trolley deflects towards the interior of the aluminum casting mould. In general, according to the second distance scale value or the third distance scale value, the distance scale value after the pouring trolley deflects towards the inside or the outside of the aluminum casting mold can be determined.

In order to implement the method for manufacturing a motor rotor provided by the present invention, the present invention further provides a device for manufacturing a motor rotor, as shown in fig. 3, the device includes:

the comparison module is used for acquiring the actual rotating speed of the centrifuge in the rotor manufacturing process, and if the actual rotating speed of the centrifuge is within the rated rotating speed interval of the centrifuge, comparing the actual rotating speed of the centrifuge with the first rotating speed of the centrifuge to generate a first adjustment value;

The present invention also provides a storage medium having a computer program stored therein, the computer program being executable by a processor to implement the methods provided by the various embodiments described above.

The storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, a storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in a communication device. The storage medium may be read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like.

The present invention also provides a program product comprising execution instructions stored in a storage medium. The at least one processor of the device may read the execution instructions from the storage medium, and the execution of the execution instructions by the at least one processor causes the device to implement the methods provided by the various embodiments described above.

In the above embodiments of the terminal or the server, it should be understood that the Processor may be a Central Processing Unit (CPU), other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of manufacturing a rotor for an electric machine, comprising:

calculating the amount of the molten aluminum to be poured and the second pouring speed to obtain the time to be poured;

the method comprises the steps of obtaining the outer circle radius of a first end ring of the cast aluminum rotor and the inner circle radius of the first end ring, calculating the outer circle radius of the first end ring and the inner circle radius of the first end ring to obtain a first rotating speed of a centrifugal machine, calculating according to the first rotating speed of the centrifugal machine and the offset rotating speed of the preset centrifugal machine, and generating a rated rotating speed interval of the centrifugal machine, and comprises the following steps:

the rated rotating speed interval of the centrifugal machine is calculated by the following formula,

wherein,

is the maximum value of the rated rotating speed interval of the centrifuge,

is the outer circle radius of the first end ring,

is the radius of the inner circle of the first end ring,

is a first rotating speed gradient parameter of the centrifugal machine,

in order to preset the offset rotating speed of the centrifuge,

in order to offset the speed gradient parameter,

2. The method of claim 1,

the method includes the steps of obtaining an actual rotating speed of a centrifuge in a rotor manufacturing process, comparing the actual rotating speed of the centrifuge with a first rotating speed of the centrifuge if the actual rotating speed of the centrifuge is within a rated rotating speed interval of the centrifuge, and generating a first adjusting value, wherein the method includes the following steps:

the first adjustment value is calculated by the following formula,

wherein,

is the outer circle radius of the first end ring,

is the radius of the inner circle of the first end ring,

is a first rotating speed gradient parameter of the centrifugal machine,

is the first adjustment value and is the second adjustment value,

is the actual rotating speed of the centrifugal machine,

the first rotating speed of the centrifugal machine is set,

to adjust the impact factor.

3. The method of claim 2,

according to the pouring infrared thermal imaging detection system, respectively obtaining a first liquid level height of an aluminum liquid at the current moment and a second liquid level height of a pouring cup at the previous moment which is away from the current moment by a preset time period, and calculating the first liquid level height, the second liquid level height and the bottom area of the pouring cup to obtain an aluminum liquid pouring variable, wherein the method comprises the following steps:

wherein,

the casting amount of the aluminum liquid is changed,

is the bottom area of the pouring cup,

is the height of the second liquid level,

is the first liquid level height.

4. The method of claim 3,

the calculating the preset time period and the aluminum liquid pouring variable to obtain a first pouring speed, and adjusting the first pouring speed according to the first adjusting value to obtain a second pouring speed, comprising:

the second pouring speed is calculated by the following formula,

wherein,

in order to achieve the second pouring speed,

the casting amount of the aluminum liquid is changed,

is a pre-set time period and is,

in order to influence the factor of the casting speed,

is the first adjustment value.

5. The method of claim 4,

the method comprises the following steps of obtaining the initial liquid level height of the aluminum liquid, calculating the initial liquid level height of the aluminum liquid, the first liquid level height and the bottom area of a pouring cup to obtain the poured amount of the aluminum liquid, obtaining the preset poured amount of the aluminum liquid of a rotor, and calculating the preset poured amount of the aluminum liquid of the rotor and the poured amount of the aluminum liquid to obtain the to-be-poured amount of the aluminum liquid, wherein the method comprises the following steps:

wherein,

the amount of the aluminum liquid to be poured is,

the pouring amount of the aluminum liquid is preset for the rotor,

is the height of the initial liquid level of the aluminum liquid,

is the height of the first liquid level,

is the bottom area of the pouring cup.

6. The method of claim 5,

calculating the amount of the aluminum liquid to be poured and the second pouring speed to obtain the time to be poured, wherein the calculating comprises the following steps:

the time to be poured is calculated by the following formula,

wherein,

in order to wait for the time of pouring,

the amount of the aluminum liquid to be poured is,

in order to achieve the second pouring speed,

is a pouring time influencing factor.

7. The method of claim 2,

further comprising:

if the actual parameters of the aluminum casting mold are smaller than the standard parameter interval of the aluminum casting mold, reducing and adjusting the depth of the standard pouring gate according to a first adjustment value, and shifting a pouring trolley influencing the depth of the standard pouring gate to the outside of the aluminum casting mold;

8. The method of claim 7, wherein determining the distance scale after the casting carriage has been deflected into or out of the aluminum mold comprises:

wherein,

for the actual parameters of the aluminum casting die,

is the minimum value of the standard parameter interval of the cast aluminum die,

the maximum value of the standard parameter interval of the cast aluminum die,

is a value of the second distance scale and,

is a value of the first distance scale,

is the first adjustment value and is the second adjustment value,

in order to adjust the normalized value of the signal,

is a third distance scale value;

and determining the distance scale value after the pouring trolley deflects towards the inside or the outside of the aluminum casting mold according to the second distance scale value or the third distance scale value.

9. An electric motor rotor manufacturing apparatus comprising:

the pouring module is used for calculating the amount of the molten aluminum to be poured and the second pouring speed to obtain the time to be poured;

wherein,

is the maximum value of the rated rotating speed interval of the centrifuge,

is the outer circle radius of the first end ring,

is the radius of the inner circle of the first end ring,

is a first rotating speed gradient parameter of the centrifugal machine,

in order to preset the offset rotating speed of the centrifuge,

in order to offset the speed gradient parameter,

is the minimum value of the rated rotating speed interval of the centrifuge.