CN109352357B

CN109352357B - Mould cutting machining center based on linear motor drive

Info

Publication number: CN109352357B
Application number: CN201811092340.6A
Authority: CN
Inventors: 杨光; 罗正光; 季青海
Original assignee: Dongguan Haosheng Industrial Co ltd
Current assignee: Watt innovation science and Technology (Shenzhen) Co.,Ltd.
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-05-15
Anticipated expiration: 2038-09-18
Also published as: CN109352357A

Abstract

The invention provides a die cutting machining center based on linear motor driving, which comprises a machine tool base body, a lower workbench, an upper workbench, a linear motor and a magnetic plate, wherein the lower workbench is arranged on the machine tool base body, the upper workbench is arranged on the lower workbench and used for placing a die, the linear motor is arranged on the lower workbench, faces the machine tool base body and used for driving the lower workbench to do linear motion on the machine tool base body, and the magnetic plate is arranged on the machine tool base body. This machining center is through improving the workstation into split type structure, has avoided because the huge magnetic attraction that produces between linear electric motor and the magnetic sheet leads to the workstation atress to warp and then influence the condition emergence of machining precision and workstation normal operating.

Description

Mould cutting machining center based on linear motor drive

Technical Field

The invention relates to the technical field of die machining, in particular to a die cutting machining center based on linear motor driving.

Background

The numerical control machine tool is a short name of a digital control machine tool (Computer numerical control machine tools), and is an automatic machine tool provided with a program control system. The control system is capable of logically processing and decoding a program defined by a control code or other symbolic instructions, represented by coded numbers, which are input to the numerical control device via the information carrier. After operation, the numerical control device sends out various control signals to control the action of the machine tool, and the parts are automatically machined according to the shape and the size required by the drawing. The machining center is a highly automated multifunctional numerical control machine tool with a tool magazine and an automatic tool changer.

Machining center's workstation is used for placing the mould to adopt linear electric motor to drive the workstation motion usually, in present machining center, produce huge magnetic attraction between linear electric motor and the magnetic sheet, can cause the workstation atress to warp, influence machining precision, can influence machining center's normal operating even.

Disclosure of Invention

Objects of the invention

In order to overcome at least one defect in the prior art and avoid the influence of magnetic attraction generated between the linear motor and the magnetic plate on the workbench, the invention provides the following technical scheme.

(II) technical scheme

As a first aspect of the present invention, the present invention discloses a mold cutting machining center based on linear motor driving, comprising:

a machine tool base;

a lower table mounted on the machine tool base;

the upper workbench is arranged on the lower workbench and used for placing a die;

the linear motor is arranged on the lower workbench, faces the machine tool base body and is used for driving the lower workbench to do linear motion on the machine tool base body;

and a magnetic plate mounted on the machine tool base body.

In a possible embodiment, the machining center further comprises: and the linear guide rail is arranged on the machine tool base body, and the linear motor drives the lower workbench to do linear motion on the machine tool base body along the linear guide rail.

In a possible embodiment, the machining center further comprises: and the sliding block is arranged on the lower working table and moves on the linear guide rail when the lower working table is driven by the linear motor.

In a possible embodiment, the machining center further comprises: and the grating ruler is arranged between the lower workbench and the machine tool base body.

In a possible embodiment, the grating scale includes: the scale grating is arranged on the machine tool base body and positioned below the lower workbench, and the grating reading head is arranged on the lower workbench.

In a possible embodiment, the machining center further comprises: and the inner protective cover is arranged on the outer side of the lower workbench and at least partially shields the outer side surface of the linear guide rail.

In a possible embodiment, the inner shield extends towards the machine base with a first end, the bottom surface of the first end of the inner shield being no higher than the bottom surface of the linear guide.

In a possible embodiment, the machining center further comprises:

an outer shield mounted to an outer side of the lower table and extending toward the machine tool base with a second end at least partially shielding an outer side of the first end of the inner shield;

the top of the middle layer is clamped between the first end part of the inner protective cover and the second end part of the outer protective cover, a certain gap is reserved between the middle layer and the first end part and between the middle layer and the second end part, and the bottom of the middle layer is installed on the machine tool base body.

In a possible embodiment, the inner protection cover is internally ventilated with compressed air.

In a possible embodiment, the machining center further comprises: and the tank chain is arranged between the lower workbench and the machine tool base body, and two ends of the tank chain are respectively connected with the lower workbench and the machine tool base body.

(III) advantageous effects

According to the die cutting machining center based on the linear motor drive, the workbench is improved into a split structure, the phenomenon that the machining precision and the normal operation of the workbench are affected due to the fact that the workbench is stressed and deformed due to huge magnetic attraction force generated between the linear motor and the magnetic plate is avoided, and meanwhile the protective cover is arranged on the outer side of the workbench and is filled with compressed air, so that dust is prevented from entering the executing mechanism.

Drawings

The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining and illustrating the present invention and should not be construed as limiting the scope of the present invention.

Fig. 1 is a front view schematically illustrating a first embodiment of a linear motor drive-based die cutting machining center according to the present invention.

Fig. 2 is an isometric view of a first embodiment of a linear motor drive based die cutting center provided in accordance with the present invention.

Fig. 3 is a schematic top view of a second embodiment of a die cutting center based on linear motor driving according to the present invention.

Fig. 4 is a partial sectional view taken along line a-a in fig. 3.

Reference numerals:

100 lower working table

200 upper working table

300 linear motor

410 inner protective cover

411 first end part

420 outer protective cover

421 second end part

430 middle layer

500 tank chain

700 grating ruler

810 linear guide rail

820 slider

900 machine tool base body

910 magnetic plate

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.

It should be noted that: in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some embodiments of the present invention, not all embodiments, and features in embodiments and embodiments in the present application may be combined with each other without conflict. 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.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are used for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate their degree of importance, order, and the like.

A first embodiment of a linear motor drive-based die cutting machining center according to the present invention will be described in detail with reference to fig. 1 to 2; this embodiment is mainly applied to mould processing, through improving the workstation into split type structure, has avoided because the huge magnetic attraction that produces between linear electric motor and the magnetic sheet leads to the workstation atress to warp and then influence the condition emergence of machining precision and workstation normal operating.

As shown in fig. 1 and fig. 2, the mold cutting center driven by a linear motor according to the present embodiment mainly includes: a lower table 100, an upper table 200, a linear motor 300, and a magnetic plate 910.

The lower table 100 is mounted on the machine tool base 900. The upper table 200 is installed on the lower table 100 for placing the mold. The upper table 200 and the lower table 100 are part of a separate structure table, and together form a complete table.

The linear motor 300 is mounted to the lower table 100 and faces the machine tool base 900, and drives the lower table 100 to move linearly on the machine tool base 900. A linear motor is a transmission device that directly converts electric energy into mechanical energy for linear motion without any intermediate conversion mechanism.

The magnetic plate 910 is mounted on the machine tool base 900.

When a mold is machined, the lower table 100 is driven by the linear motor 300 to make linear motion according to instructions of a machining program, the upper table 200 moves along with the lower table 100, the mold placed on the upper table 200 also moves together, and the main shaft also rotates the cutter to cut the mold, so that a finished product is finally obtained.

Wherein, the lower workbench 100 is used as a part of the split workbench and is used for bearing huge magnetic attraction force generated between the linear motor 300 and the magnetic plate 910, and the upper workbench 300 is installed on the lower workbench 100 after the lower workbench 100 is stressed and deformed stably, and because the upper workbench 300 is not influenced by the attraction force of the linear motor 110, the problem of stress and deformation does not exist, and the precision stability of the upper workbench 300 can be ensured.

In one embodiment, the machining center further comprises: and a linear guide 810 installed on the machine tool base 900, wherein the linear motor 300 drives the lower table 100 to move linearly on the machine tool base 900 along the linear guide 810.

The linear guide 810 functions to support and guide the table in a reciprocating linear motion in a given direction. The linear guide 810 is generally provided in two, and symmetrically disposed under the table. The linear guide in this embodiment is a sliding friction guide, but it is understood that other types such as a rolling friction guide, an elastic friction guide, and a fluid friction guide may be used.

In one embodiment, the machining center further comprises: and a slider 820 mounted to the lower table 100 and moving on the linear guide 810 when the lower table 100 is driven by the linear motor 300.

The slider 820 is used for matching the linear guide 810 to move, the shape of the slider 820 matches the linear guide 810, for example, the section of the linear guide 810 is wider than the middle part, a through groove with a similar shape is also arranged on the surface of the slider 820 matching the linear guide 810, and the through direction of the through groove is the moving direction of the slider 820. The number of sliders 820 corresponds to the number of linear guides 810, and one or more sliders 820 are mounted on each linear guide 810.

In one embodiment, the machining center further comprises: and a grating scale 700 which is mounted between the lower table 100 and the machine tool base 900 and detects the displacement amount of the lower table 100.

Grating scales, also known as grating scale displacement sensors, are measurement feedback devices that operate using the optical principle of gratings. Grating scales are often applied to closed-loop servo systems of numerically controlled machine tools and can be used for detecting linear displacement or angular displacement. The signal output by the sensor is digital pulse, and the sensor has the characteristics of large detection range, high detection precision and high response speed. In a numerically controlled machine tool, it is often used to detect the coordinates of the tool and the workpiece to observe and track the feed error, so as to compensate the motion error of the tool.

The grating ruler 700 in this embodiment is designed inside the whole workbench and is not exposed outside the workbench, that is, the grating ruler 700 is invisible in the direction perpendicular to the linear motion of the workbench, so as to avoid the grating ruler 700 from being interfered by the outside, and simultaneously, the grating ruler 700 can measure the movement amount of the workbench at the nearest distance, so as to ensure that the detected data is close to the actual motion value of the workbench.

In one embodiment, the grating scale 700 includes: a scale grating mounted to the machine base 900 below the lower table 100, and a grating readhead mounted to the lower table 100.

During operation of the machining center, the grating reading head moves linearly with the lower table 100 of the machining center, and the scale grating is fixed to a fixed structure of the machining center, for example, the machine tool base 900, thereby measuring the displacement of the lower table 100.

In one embodiment, the machining center further comprises: and a tank chain 500 which is provided between the lower table 100 and the machine tool base 900 and has both ends connected to the lower table 100 and the machine tool base 900, respectively. The tank chain 500 is used to tow and protect cables that drive the power and control signals provided to the workstation.

A second embodiment of a linear motor drive-based die cutting machining center according to the present invention will be described in detail with reference to fig. 3 to 4; this embodiment is mainly applied to mould processing, through improving the workstation into split type structure, has avoided because the huge magnetic attraction that produces between linear electric motor and the magnetic sheet leads to the workstation atress to warp and then influence the condition emergence of machining precision and workstation normal operating, sets up the protection casing in the workstation outside simultaneously to let in compressed air, avoid the dust to get into actuating mechanism.

As shown in fig. 3 and 4, the mold cutting center driven by a linear motor according to the present embodiment mainly includes: lower table 100, upper table 200, linear motor 300, linear guide 810, magnetic plate 910, and inner shield 410.

The linear guide 810 is installed on the machine tool base 900, and the linear motor 300 drives the lower table 100 to move linearly on the machine tool base 900 along the linear guide 810. The linear guide 810 functions to support and guide the table in a reciprocating linear motion in a given direction.

The magnetic plate 910 is mounted on the machine tool base 900.

The inner shield 410 is installed outside the lower table 100 and at least partially shields the outer side surface of the linear guide 810.

When the lower table 100 moves on the linear guide 810, if substances such as dust and impurities enter the table from the outside and fall on the linear guide 810, the path accuracy of the lower table 100 during movement is affected, and therefore the inner shield 410 is installed on the outer side of the lower table 100, and the inner shield 410 partially or completely shields the outer side surface of the linear guide 810 to prevent dust from falling on the linear guide 810. It should be noted that the shielding means that the inner shield 410 can partially or completely isolate the outer side surfaces of the linear guide 810 and the slider 820 from the outside in a non-closed manner, and a certain distance is left between the inner shield 410 and the linear guide 810 and the slider 820.

In one embodiment, inner shroud 410 has a first end 411 extending toward machine base 900, and the bottom surface of first end 411 of inner shroud 410 is no higher than the bottom surface of linear guide 810.

Both ends of the inner shield 410 extend towards the machine tool base body to form a first end portion 411, and the bottom surface of the first end portion 411 is not higher than the bottom surface of the linear guide 810. If the area of the position where the first end 411 projects on the machine tool base 900 is lower than the area of the position where the linear guide 810 is located, that is, the linear guide 810 is located on a boss higher than the area of the position where the first end 411 projects on the machine tool base 900, the surface of the first end 411 is located outside and lower than the boss when extending to the surface of the machine tool base 900. Therefore, the end surface of the first end 411 is lower than the top surface of the boss, i.e., lower than the bottom surface of the linear guide 810, and the inner side surface of the first end 411 is in contact with the side surface of the boss or has a certain gap therebetween, thereby preventing dust from entering from the outer region of the linear guide 810.

In one embodiment, the machining center further includes an outer shroud 420 and an intermediate layer 430.

The outer shield 420 is mounted outside the lower table 100 and extends towards the machine base 900 with a second end 421 at least partially shielding the outer side of the first end 411 of the inner shield 410.

The outer shield 420 is disposed outside the inner shield 410, and has a structure similar to that of the inner shield 410, and the outer shield 420 also has a second end 421 extending toward the machine tool base 900, with a certain distance between the second end 421 and the first end 411 for mounting the middle layer 430.

The top of the middle layer 430 is sandwiched between the first end 411 of the inner shield 410 and the second end 421 of the outer shield 420, and has a certain gap with the first end 411 and the second end 421, and the bottom of the middle layer 430 is mounted on the machine tool base 900.

After the outer shield 420 and the middle layer 430 are added, the inner shield 410, the middle layer 430 and the outer shield 420 can perform a double-layer shielding function. Specifically, if the external dust enters the inside of the workbench, the external dust needs to pass through the gap between the second end 421 of the outer shield 420 and the middle layer 430, then pass through the gap between the middle layer 430 and the first end 411 of the inner shield 410, and finally pass through the gap between the first end 411 and the boss where the linear guide 810 is located, so as to reach the inside of the workbench. Through the design of the S-shaped bent path, dust cannot easily enter the execution unit.

In one embodiment, the interior of the inner shroud 410 is vented with compressed air.

Machining center is connected with or is equipped with air feeder, and air feeder can provide compressed air, and the of giving vent to anger of air supply line can let in workstation inner region through tank chain 500 etc to provide compressed air, compressed air can follow the crooked route blowout of above-mentioned S type, makes workstation inner region' S atmospheric pressure be a little higher than external atmospheric pressure, further prevents that the dust from getting into inside the execution unit and falling on linear guide 810, thereby has guaranteed the operating life of lathe. The compressed air flows as indicated by the dashed lines and arrows in fig. 4.

In one embodiment, the machining center further comprises: and a slider 820 mounted to the lower table 100 and moving on the linear guide 810 when the lower table 100 is driven by the linear motor 300. The slider 820 is used for matching the linear guide 810 to move, and the shape of the slider 820 is matched with the linear guide 810.

The specific structures of the lower table 100, the upper table 200, the linear motor 300, the grating scale 700, the linear guide 810, the slider 820, the machine tool base 900, the magnetic plate 910, and other components of this embodiment can refer to the structural arrangements described in the foregoing first embodiment, and are not described again.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A mold cutting machining center based on linear motor drive, characterized by comprising:

a machine tool base (900);

a lower table (100) attached to the machine tool base (900);

an upper table (200) mounted on the lower table (100) for placing a mold;

a linear motor (300) mounted on the lower table (100) and facing the machine tool base (900), for driving the lower table (100) to make a linear motion on the machine tool base (900);

a magnetic plate (910) attached to the machine tool base (900);

wherein, lower workstation (100) install in advance on lathe base member (900), be used for bearing linear electric motor (300) with the huge magnetic attraction that produces between magnetic sheet (910), last workstation (200) is in lower workstation (100) receive magnetic sheet (910) magnetic attraction and warp and install after stable, make last workstation (200) do not receive the suction of linear electric motor (300) influence.

2. The machining center of claim 1, further comprising: and the linear guide rail (810) is arranged on the machine tool base body (900), and the linear motor (300) drives the lower workbench (100) to do linear motion on the machine tool base body (900) along the linear guide rail (810).

3. The machining center of claim 2, further comprising: a slider (820) mounted to the lower table (100) and moving on the linear guide (810) when the lower table (100) is driven by the linear motor (300).

4. The machining center of claim 2, further comprising: and a grating scale (700) mounted between the lower table (100) and the machine tool base (900).

5. Machining center according to claim 4, characterized in that the grating ruler (700) comprises: a scale grating mounted on the machine tool base (900) and located below the lower table (100), and a grating readhead mounted on the lower table (100).

6. The machining center of claim 2, further comprising: an inner shield (410) mounted outside the lower table (100) and at least partially shielding an outer side surface of the linear guide (810).

7. The machining center according to claim 6, characterized in that the inner shield (410) extends with a first end (411) towards the machine base (900), the bottom surface of the first end (411) of the inner shield (410) being no higher than the bottom surface of the linear guide (810).

8. The machining center of claim 7, further comprising: an outer shield (420) attached to the outside of the lower table (100) and extending toward the machine tool base (900) with a second end (421) at least partially covering the outside of the first end (411) of the inner shield (410); and the top of the middle layer (430) is clamped between the first end part (411) of the inner protective cover (410) and the second end part (421) of the outer protective cover (420), a certain gap is reserved between the middle layer and the first end part (411) and the second end part (421), and the bottom of the middle layer (430) is installed on the machine tool base body (900).

9. Machining center according to any of claims 6-8, characterized in that the inner shield (410) is internally ventilated with compressed air.

10. The machining center of claim 1, further comprising: and a tank chain (500) which is arranged between the lower workbench (100) and the machine tool base body (900), and two ends of the tank chain are respectively connected to the lower workbench (100) and the machine tool base body (900).