JP7252426B1 - Machine tool control device and machine tool display device - Google Patents

Abstract

To provide a technique capable of accurately determining whether chips can be shredded even if machining conditions change in swing cutting, and facilitating the adjustment of machining conditions. The machine tool control device 1 includes a condition acquisition unit 11 that acquires one or two pieces of information of the feed amount F, the oscillation frequency magnification I, and the oscillation amplitude magnification K as preconditions. , an air cut amount acquisition unit 12 that acquires a specified air cut amount indicating the degree of air cut in the swinging direction, and an air cut amount based on between a pass of n rotations and a pass of rotations after n rotations. and a processing control unit 13 that determines information that the condition acquisition unit 11 has not acquired among the three pieces of information based on the precondition and performs processing control so as to achieve a designated air cut amount.

Description

The present disclosure relates to a machine tool control device and a machine tool display device.

Conventionally, in order to prevent chips that are continuously generated during machining from entangling with the workpiece or cutting tool and cause machining defects or machine failures, the workpiece is moved while the tool and workpiece are oscillated relative to each other. process.

In this type of oscillating machining, by setting the tool path, which is the trajectory of the tool, so that it partially overlaps with the previous tool path, the tool moves away from the surface of the work piece. Techniques for shredding are known (see, for example, Patent Documents 1 and 2).

JP 2018-094690 A Japanese Patent Application Laid-Open No. 2020-009248

By the way, in cutting, it was often determined by the amplitude magnification, which is the ratio of the amplitude to the feed amount of the tool per revolution of the spindle. In the setting of the amplitude magnification, in order to reliably generate an air cut, a value with a slight margin is set instead of setting the limit at which the air cut occurs. For example, even if an air cut occurs at an amplitude magnification of 1.0 times theoretically, machining is performed at an amplitude magnification of 1.2 times with a margin.

However, in the method of determining the oscillation amplitude based on the amplitude magnification, even if the amplitude magnification is the same, the chip shredding depends on the difference in feed speed. Also, in taper machining, even if the feed rate is constant, if the taper angle is large, the feed rate in the swinging direction will be low, which will change whether chips can be shredded. was difficult.

In addition, since the value of the amplitude magnification required to achieve chip shredding changes depending on the set value of the frequency magnification, which is the number of oscillations per rotation of the main shaft, the method of setting the amplitude magnification itself determines the chip shredding. It was difficult to understand the relationship between whether or not it was possible, and it was difficult to adjust the processing conditions.

The present disclosure has been made in view of the above problems, and provides a technique that can accurately determine whether chips can be shredded even if the processing conditions change in rocking cutting, and facilitates adjustment of processing conditions. for the purpose.

The present disclosure relates to a control device for a machine tool that performs machining while relatively swinging a cutting tool and a work, comprising: information regarding a relative feed amount per rotation of the cutting tool and the work; and information on the number of oscillations per relative rotation of the work, and information on the amplitude of oscillation with respect to the relative feed amount per rotation of the cutting tool and the work. Alternatively, a condition acquisition unit that acquires two pieces of information as preconditions, an air cut amount acquisition unit that acquires a specified air cut amount indicating the degree of air cut in the swinging direction, and a pass of n rotations and after n rotations The information that the condition acquisition unit has not acquired among the three pieces of information is determined based on the precondition so that the amount of air cut based on the path of rotation of is equal to the specified amount of air cut, and processing and a machining control unit that performs control.

Further, the present disclosure is a display device for a machine tool that performs machining while relatively swinging a cutting tool and a work, comprising information on a relative feed amount per rotation of the cutting tool and the work; Of the three types of information, information on the number of oscillations per relative rotation between the tool and the work, and information on the amplitude of oscillation relative to the relative feed amount per rotation between the cutting tool and the work, A condition input unit that accepts input of one or two pieces of information as a precondition, an air cut amount input unit that accepts input of a specified air cut amount indicating the degree of air cut in the swinging direction, a pass of n rotations and n rotations Information that the condition acquisition unit has not acquired among the three pieces of information is calculated based on the precondition so that the amount of air cut based on the subsequent rotation pass is equal to the specified amount of air cut. and a display unit for displaying the calculated information of the information calculation unit.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a technique that can accurately determine whether or not chips can be shredded even if the machining conditions change in the swing cutting process, and that facilitate adjustment of the machining conditions.

It is a figure for demonstrating swing cutting. 1 is a functional block diagram of a machine tool control device according to a first embodiment; FIG. It is a block diagram which shows the conditions which the condition acquisition part of 1st Embodiment acquires. It is a figure which shows the example of a processing program. FIG. 4 is a diagram schematically showing the positional relationship between a workpiece and a cutting tool; It is a block diagram which shows the conditions which the condition acquisition part of 2nd Embodiment acquires. FIG. 4 is a diagram schematically showing the positional relationship between a workpiece and a cutting tool when the taper angle is small; FIG. 4 is a diagram schematically showing the positional relationship between a workpiece and a cutting tool when the taper angle is large; FIG. 11 is a block diagram showing conditions acquired by a condition acquisition unit according to the third embodiment; FIG. 11 is a functional block diagram of a display device for a machine tool according to a modification;

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[First embodiment]
A machine tool control device 1 according to a first embodiment of the present invention is for performing oscillating cutting in which a workpiece is cut (turned) while the cutting tool and the workpiece are relatively oscillated. First, swing cutting will be described with reference to FIG.

FIG. 1 is a diagram for explaining swing cutting. In one example of oscillating cutting shown in FIG. 1, at least one main shaft S for relatively rotating the cutting tool T and the work W, and at least one feed shaft for relatively moving the cutting tool T with respect to the work W ( ) are operated to rotate the cutting tool T and the work W relative to each other, and cutting is performed while the cutting tool T and the work W are relatively rocked in the feeding direction. At this time, the tool path, which is the trajectory of the cutting tool T, is set so that the current path partially overlaps the previous path. That is, since the part that has been machined in the previous pass is partially included in the current pass, the tip of the cutting tool T separates from the surface of the workpiece W, which is called an air cut. .

Note that the shape of the workpiece is not limited in the swing cutting performed in this embodiment. That is, even if a plurality of feed axes (Z-axis and X-axis) are required because the work has a tapered portion or an arcuate portion on the machining surface, the work can be cylindrical or cylindrical and the feed axis can be a specific one. It is applicable even if (Z-axis) is sufficient.

Next, the configuration of the machine tool control device 1 will be described. FIG. 2 is a functional block diagram of the machine tool control device 1 according to one embodiment of the present invention. The machine tool control device 1 of the present embodiment includes, for example, a memory such as a ROM (read only memory) or a RAM (random access memory), a CPU (control processing unit), and a communication control unit, which are connected to each other via a bus. It is configured using a computer equipped with a unit. The functions and operations of the above functional units are achieved through the cooperation of the CPU and memory installed in the computer, and the control program stored in the memory. In addition, the control device 1 of the machine tool may be composed of a CNC (Computer Numerical Controller), a PLC (Programmable Logic Controller), or the like, and may be a high-level computer that outputs machining conditions such as rotation speed in addition to the machining program. may be connected to For convenience, FIG. 2 shows only the motor 3 that drives one feed shaft.

As shown in FIG. 2, the machine tool control device 1 includes a condition acquisition unit 11, an air cut amount acquisition unit 12, a machining control unit 13, a storage unit 14, an input unit 15, and a display unit 16. , provided.

The condition acquisition unit 11 acquires machining conditions and oscillation conditions for machining the workpiece W by oscillation. The machining conditions and the swing conditions may be those stored in the storage unit 14, or may be output from an external computer, for example.

Here, the machining conditions include at least information on the relative feed amount per rotation between the cutting tool and the workpiece and information on the shape of the cutting edge of the cutting tool. min), cutting tool feed rate (mm/min), workpiece diameter (mm), cutting tool relief angle (°), and other information. Information on the relative feed amount per rotation between the cutting tool and the workpiece includes the transfer amount F (mm/rev), the rotation speed S (1/min) of the spindle and the feed rate of the cutting tool ( mm/min), and the information on the shape of the cutting edge of the cutting tool includes the R (mm) of the cutting edge.

The oscillation conditions include information on the number of oscillations per relative rotation between the cutting tool and the workpiece, and information on oscillation amplitude relative to the relative feed amount per rotation between the cutting tool and the workpiece. . Information on the number of oscillations per relative rotation between the cutting tool and the workpiece includes an oscillation frequency multiplier I (multiplier) that indicates the oscillation frequency per rotation of the spindle. Further, as the information on the oscillation amplitude with respect to the relative feed amount per rotation of the cutting tool and the workpiece, the oscillation amplitude magnification K (times). The oscillation frequency magnification I (times) may be specified directly, or may be calculated from the oscillation frequency (Hz) and the spindle rotation speed S (1/min) after specifying the oscillation frequency (Hz). good. Similarly, the oscillation amplitude magnification K (times) may be specified directly, or after specifying the oscillation amplitude (mm), the oscillation amplitude (mm), feed rate (mm/min), and spindle rotation speed may be specified. It may be calculated from S (1/min).

The air cut amount acquisition unit 12 acquires a specified air cut amount that is specified in advance by an operator or the like. The air cut amount may be stored in the storage unit 14, obtained from an external computer, or input through the input unit 15, for example.

The amount of air cut here is the amount of air cut between a pass in n rotations and a pass in rotations after n rotations (rotations after n+1). In this embodiment, the amount of air cut between the n-th pass and the (n+1)-th pass is used to determine the machining conditions, but the present invention is not limited to this. For example, the amount of air cut between the nth pass and the n+2th pass may be used to determine the machining conditions.

The distance in the swinging direction is used as the amount of air cut in this embodiment. In the present embodiment, since it swings in the feed direction by the feed shaft, the amount of air cut is a numerical value indicating the degree of air cut in the feed direction. The air cut amount may be an index indicating the size of the air cut, it may be the distance in the swinging direction, or it may be linked to the area including the swinging direction, or the air cut amount predetermined in the table. It may be expressed as a level or a magnification with respect to an arbitrary reference value (for example, workpiece diameter, feed amount, etc.).

The machining control unit 13 performs machining control based on the conditions acquired by the condition acquisition unit 11 so that the amount of air cut after the start of machining becomes the specified amount of air cut. The details of the processing control by the processing control unit 13 will be described later.

The storage unit 14 stores various information for machine tool control and processing. In this embodiment, the storage unit 14 stores the machining conditions, the swing conditions, and the air cut amount designated by the operator. Machining conditions, rocking conditions, and air cut amounts are, for example, input into the machining program by the operator or specified as machine tool parameters. Note that the storage unit 14 may be configured to be arranged outside the control device 1 instead of inside the control device 1 .

The input unit 15 inputs information about processing in accordance with an operator's input operation to input means (not shown) such as a keyboard or a touch panel. Information about processing input by the input unit 15 is stored in the storage unit 10 or the like, or input to each unit of the control device 1 .

The display unit 16 displays various information about the machine tool, the control device 1 and machining.

Next, conditions acquired by the condition acquisition unit 11 and processing control by the processing control unit 13 will be described with reference to FIG. FIG. 3 is a block diagram showing conditions acquired by the condition acquisition unit 11 of the first embodiment.

As shown in FIG. 3 , the condition acquisition section 11 includes a frequency magnification acquisition section 21 and a feed amount acquisition section 22 . The frequency magnification acquisition unit 21 is an oscillation number acquisition unit that acquires information about the number of oscillations per relative rotation of the cutting tool and the workpiece. get. The feed amount acquisition unit 22 acquires the transfer amount F (mm/rev) of the spindle each time as information regarding the relative feed amount per rotation between the cutting tool and the work.

FIG. 4 is a diagram showing an example of a machining program. In the machining program shown in FIG. 4, various information is specified by the operator through the input unit 15 or the like.
In the machining program of FIG. 4, the block "S2000 M03" is a description indicating forward rotation of the spindle. In the "G8.5 P2 I0.5 L0.02" block, "I0.5" indicating the frequency multiplier and "L0.02" indicating the specified air cut amount are described. "F0.1" in the block "G01 Z20.F0.1" is a description indicating the feed amount.

When the machining operation is started, the condition acquisition unit 11 of the control device 1 acquires the frequency magnification and the feed amount from the machining program, and the air cut amount acquisition unit 12 acquires the designated air cut amount. In the example of FIG. 4, the condition acquisition unit 11 acquires a frequency magnification of 0.5 [times] from "I0.5" and a transfer amount of 0.1 [mm/rev] each time from "F0.1". do. Further, the air cut amount acquisition unit 12 acquires the designated air cut amount of 0.02 [mm] from "L0.02".

The machining control unit 13 uses the following formula based on the frequency magnification and the feed amount, which are the conditions acquired by the condition acquisition unit 11, and the specified air cut amount acquired by the air cut amount acquisition unit 12 to perform rocking. Determine the oscillation amplitude for cutting. In this example, a frequency magnification of 0.5 [times], a transfer amount of 0.1 [mm/rev] each time, and a specified air cut amount of 0.02 [mm] are substituted.

In formula (1), I is the frequency magnification [times], F is the transfer amount [mm/rev] each time, L is the specified air cut amount [mm], A is the swing amplitude [mm], and θ is the air cut amount. represents the phase [°] of the workpiece where L is.

FIG. 5 is a diagram schematically showing the positional relationship between the workpiece W and the cutting tool T. As shown in FIG. As shown in FIG. 5, the machining control unit 13 uses a formula to set the air cut amount between the previous pass, which is the nth cutting pass, and the current pass, which is the n+1th cutting pass, to the specified air cut amount. Oscillating cutting is performed based on the oscillation amplitude A calculated using (1).

The machining control unit 13 outputs information indicating the calculated oscillation amplitude to the display unit 16 . The display unit 16 conveys the swing amplitude to the operator using character information, graphic information, or a combination thereof, which indicates the swing amplitude.

According to the control device 1 of the machine tool which performs machining while relatively rocking the cutting tool T and the workpiece W according to the first embodiment described above, the following effects are exhibited.

In the control device 1 of the machine tool according to the present embodiment, the information (for example, the feed amount F) regarding the relative feed amount per rotation of the cutting tool T and the work W, and the relative feed amount of the cutting tool T and the work W Information on the number of oscillations per rotation (e.g., oscillation frequency magnification I) and oscillation amplitude (e.g., oscillation amplitude magnification K) with respect to the relative feed amount per rotation of the cutting tool T and the workpiece A condition acquisition unit 11 that acquires one or two pieces of information out of three types of information as a precondition, and an air cut amount acquisition unit that acquires a designated air cut amount indicating the degree of air cut in the swinging direction. 12, and the condition acquisition unit 11 does not acquire any of the three pieces of information so that the amount of air cut based on the pass of n rotations and the pass of rotations subsequent to n rotations is the specified amount of air cuts. and a processing control unit 13 that determines information based on preconditions and performs processing control. As a result, since the target designated air cut amount is set, it is possible to accurately determine whether chips can be shredded and to easily adjust the machining conditions even if the machining conditions change in the swing cutting.

In addition, the condition acquisition unit 11 of the present embodiment acquires information on the feed amount and information on the number of oscillations among the three pieces of information as preconditions, and the machining control unit 13 acquires the pass of n rotations and the number of rotations rather than n rotations. The information about the swing amplitude is determined based on the information about the feed amount and the information about the number of swings so that the air cut amount based on the pass of the next rotation (n+1 rotations) becomes the specified air cut amount. With the method of determining the oscillation amplitude by setting the oscillation amplitude magnification, as in the prior art, even with the same amplitude magnification, chip shredding depends on the difference in feed rate. For example, when the frequency magnification is 0.5 [times], the amplitude magnification is 1.2 [times], and the feed amount is 0.04 [mm/rev], the theoretical air cut amount is 8.0 [μm]. On the other hand, even if the frequency magnification is 0.5 [times] and the amplitude magnification is 1.2 [times], the theoretical air cut amount is 2.0 [μm] when the feed amount is 0.01 [mm/rev]. It will end up. In this regard, in the control device 1 of the present embodiment, even if the feed amount changes, the oscillation amplitude is calculated based on the designated air cut amount. A different situation can be avoided.

Moreover, the control device 1 of the present embodiment further includes a display section 16 that outputs information determined by the processing control section 13 . As a result, the operator can easily check the safety and the production plan based on the calculation result of the machining control unit 13 such as the oscillation amplitude.

Next, an embodiment different from the first embodiment will be described. In addition, in the following description, the same reference numerals may be assigned to configurations common to the above-described embodiment, and detailed description thereof may be omitted.

[Second embodiment]
FIG. 6 is a block diagram showing conditions acquired by the condition acquisition unit 11a of the second embodiment. The control device 1 according to the second embodiment differs from the machine tool control device 1 according to the first embodiment in the conditions acquired by the condition acquisition unit 11a and the control method of the machining control unit 13a. Other configurations are common to the first embodiment.

As shown in FIG. 6 , the condition acquisition section 11 a includes a frequency magnification acquisition section 21 , a feed amount acquisition section 22 and a taper information acquisition section 23 .

The taper information acquisition unit 23 acquires taper information regarding the taper of the work W from the storage unit 14 . The taper information includes, for example, information related to taper processing such as the direction of movement of the cutting tool T and the taper angle, which is the angle of movement. The taper angle is the angle formed by the central axis and the surface of the work W, for example. Also, the taper information may be specified by the operator and described in the machining program, or may be held as a parameter of the machine tool.

When taper processing is performed, the processing control unit 13a of the second embodiment changes the calculation of the oscillation amplitude in consideration of the size of the taper angle. More specifically, the oscillation amplitude is calculated based on Fz, which is the velocity component of the feed amount F in the Z-axis direction. The effect of the taper angle varies depending on the degree of the angle. Calculation of Fz, which is the velocity component of the feed amount F in the Z-axis direction, will be described separately for a case where the taper angle is small and a case where the taper angle is large.

FIG. 7 is a diagram schematically showing the positional relationship between the workpiece and the cutting tool when the taper angle θ1 is small. In the example shown in FIG. 7, since the taper angle θ1 is small, even if Fz, which is the speed component of the feed amount F in the Z-axis direction, is calculated using geometrical calculation, F≈Fz is established. , the velocity component Fz in the Z-axis direction substantially coincides with F. For example, even when F=feed amount 0.1 [mm/rev], Fz=0.1 [mm/rev]. In this case, the oscillation amplitude A is calculated by substituting Fz=0.1 into the equation (1).

FIG. 8 is a diagram schematically showing the positional relationship between the workpiece and the cutting tool when the taper angle is small. In the example shown in FIG. 7, since the taper angle θ2 is large, it cannot be said that F≈Fz is established even if Fz is calculated using geometric calculation. For example, when F=feed amount 0.1 [mm/rev], Fz=0.01 [mm/rev]. In this case, the oscillation amplitude A is calculated by substituting Fz=0.01 into the equation (1).

According to the control device 1 of the machine tool which performs machining while relatively rocking the cutting tool T and the workpiece W according to the second embodiment described above, the following effects are exhibited.

The condition acquisition unit 11a of the second embodiment acquires taper information regarding the movement direction and movement angle of the cutting tool T, and the processing control unit 13a calculates the feed amount ( The feed amount Fz) is acquired, and the information (oscillation amplitude A) not acquired by the condition acquisition unit 11 is determined using the feed amount in the oscillation direction. In the prior art, the specified air cut amount is not specified in either case of FIGS. The judgment result of shredding will change. In this regard, in the control device 1 of the second embodiment, even if the taper angle is large and the velocity component in the Z-axis direction is greatly different, the oscillation amplitude is calculated based on the designated air cut amount. It is possible to avoid a situation in which the chip shredding determination result differs due to the difference.

[Third embodiment]
FIG. 9 is a block diagram showing conditions acquired by the condition acquisition unit 11b of the third embodiment. The control device 1 according to the third embodiment differs from the machine tool control device 1 according to the first embodiment in the conditions acquired by the condition acquisition unit 11b and the control method of the machining control unit 13b. Other configurations are common to the first embodiment.

As shown in FIG. 9 , the condition acquisition section 11 b includes a feed amount acquisition section 22 and a specific information acquisition section 24 .

The specific information acquisition unit 24 obtains information on the number of oscillations per relative rotation between the cutting tool T and the workpiece W (oscillation frequency magnification I), and the relative feed per rotation between the cutting tool T and the workpiece. Specific information for the processing control unit 13b to specify the oscillation amplitude (oscillation amplitude magnification K) with respect to the amount is acquired from the storage unit 14 . If either one of the oscillation frequency magnification I and the oscillation amplitude magnification K can be uniquely determined, the other can be calculated by Equation (1).

An example of specific information acquired by the specific information acquisition unit 24 will be described. The specified information may be a specified chip length indicating a chip length specified by the operator. By setting the specified chip length, the oscillation frequency magnification I can be uniquely determined. The specific information can also be the upper limit of the frequency. For example, set the oscillation frequency to be close to the frequency upper limit, fix the number of oscillations per spindle rotation if the upper limit is not exceeded, and set the upper limit if the upper limit is exceeded. It is also possible to reduce the number of oscillations per revolution of the main shaft until Thereby, the oscillation frequency scale factor I can be specified. Further, the specific information may be a recommended value of the oscillation frequency, and the oscillation frequency multiplier I can be uniquely determined even when the operation is set to operate at the recommended value.

Further, if the specified information is the upper limit value of the swing amplitude and the swing amplitude is set to always be the upper limit value, the swing amplitude magnification K can be uniquely specified. Further, after specifying the oscillation amplitude magnification K as the specific information, if there are a plurality of options for the oscillation frequency magnification I, the setting is such that a smaller numerical oscillation frequency magnification I is selected in order to perform machining control. can be uniquely specified. The specified information is the lower limit value of the oscillation amplitude, and when the oscillation frequency magnification I is 1.0 or I is 0.99 and the amplitude upper limit value is reached, the oscillation frequency magnification I is set to be shifted in the smaller direction. By doing so, the oscillation frequency scale factor I can be uniquely specified. Also, specified information may be a specified speed upper limit value, acceleration upper limit value, jerk upper limit value, or the like. Alternatively, the acceleration may be controlled to be the lowest. Furthermore, a plurality of such exemplified specific information may be combined. As described above, the specific information is a rule set in the machine tool, and may be any information that allows the machining control unit 13 to identify the information.

In the above example, out of the three pieces of information of the feed amount, the oscillation frequency magnification I, and the oscillation amplitude magnification K, the information on the feed amount is obtained, and based on the specified air cut amount and the specific information, the oscillation frequency magnification I and the oscillation amplitude magnification K is determined, but information on the oscillation frequency magnification I or the oscillation amplitude magnification K is acquired instead of the feed amount, and the remaining two are determined based on the designated air cut amount and specific information. Configuration is fine.

In that case, the identification information can uniquely identify the feed rate using an index related to cycle time or an index related to surface roughness.

The machining control unit 13b of the third embodiment determines the oscillation frequency magnification I and the oscillation amplitude magnification K based on the feed amount, the designated air cut amount, and the specific information.

According to the control device 1 of the machine tool which performs machining while relatively swinging the cutting tool T and the work W according to the third embodiment described above, the following effects are exhibited.

The condition acquisition unit 11b of the third embodiment acquires the information on the feed amount as a precondition among the three pieces of information, and also acquires the specific information indicating the conditions for specifying the information on the number of oscillations or the information on the oscillation amplitude. Then, the machining control unit 13b controls the feed amount based on the information on the feed amount and the specific information so that the amount of air cut between the pass of n rotations and the pass of rotation after n rotations is the specified air cut amount. to determine information about the number of oscillations and information about the amplitude of oscillation. As a result, in the configuration where the condition acquisition unit 11b acquires the feed amount, the rocking frequency scale factor I and the rocking amplitude scale factor K can be easily specified by using the specific information.

Also, the configuration of the control device 1 of the above-described embodiment can be appropriately changed according to circumstances, such as omitting some functions or adding other functions.

In the above embodiment, each of the machining control units 13, 13a, and 13b calculates the oscillation amplitude, but may be configured to determine the amplitude magnification instead of the oscillation amplitude. In this case, in the control stage, the amplitude is determined from the feed amount per revolution of the spindle and the amplitude magnification, and the amplitude is used for control.

Further, the processing control unit may be configured to determine information different from the information regarding the oscillation amplitude depending on the conditions acquired by the condition acquisition unit. For example, the condition acquisition unit may acquire information on the number of oscillations and information on the amplitude of oscillation, and the processing control unit may determine information on the feed amount based on the information on the number of oscillations and the information on the amplitude of oscillation. . Further, the condition acquisition unit acquires information on the number of oscillations, and specific information specifying information on the feed amount set in the machine tool and information on the amplitude of oscillation, and the machining control unit acquires information on the number of oscillations. and specific information, the information about the feed amount and the information about the oscillation amplitude may be determined. Further, the condition acquisition unit acquires information on the oscillation amplitude, and specific information specifying information on the feed amount and the number of oscillations set in the machine tool, and the machining control unit acquires the information on the oscillation amplitude. Information about the feed amount and information about the number of oscillations may be determined based on the specific information. Numerical formula (1) can also be used to calculate specific numerical values.

Moreover, the determination method and the calculation method described above are examples, and the information necessary for processing control may be calculated by a method different from the method using the above-described formula.

Note that the present disclosure is not limited to the above-described embodiments, and includes modifications and improvements within the scope of achieving the object of the present disclosure.

In the above embodiment, the present disclosure is applied to the machine tool control device, but the present disclosure is not limited to this. The present disclosure may be applied to display devices for machine tools.

Here, FIG. 10 is a functional block diagram of the display device 9 of the machine tool according to the modification. As shown in FIG. 10 , the machine tool display device 9 includes a condition input section 91 , an air cut amount input section 92 , an information calculation section 93 , and a display section 96 .

The condition input unit 91 corresponds to the condition acquisition units 11, 11a, and 11b of the above embodiments. That is, the condition input unit 91 receives information on the relative feed amount per rotation between the cutting tool and the work, information on the number of relative oscillations per rotation between the cutting tool and the work, and information on the cutting tool and the work. 1 or 2 of the three pieces of information (1) and (3) regarding the relative feed amount per rotation and the input is accepted as a precondition.

The air cut amount input section 92 corresponds to the air cut amount acquisition section 12 of the above embodiment. That is, the air cut amount input unit 92 receives input of a designated air cut amount indicating the degree of air cut in the swinging direction.

The information calculation unit 93 corresponds to a part of the processing control units 13, 13a, and 13b of the above embodiments. That is, the information calculation unit 93 determines that the condition input unit among the three pieces of information is Information that has not been received is calculated based on preconditions.

The display section 96 corresponds to the display section 16 of the above embodiment. That is, the display section 96 displays information calculated by the information calculation section 93 .

According to the machine tool display device 9 having the above configuration, the same effects as those of the machine tool control device 1 according to the above embodiment can be obtained.

1 machine tool control device 11, 11a, 11b condition acquisition unit 12 air cut amount acquisition unit 13, 13a, 13b machining control unit 16 display unit 9 machine tool display unit 91 condition input unit 92 air cut amount input unit 93 information calculation Part 96 Display part

Claims (5)

A control device for a machine tool that performs machining while relatively swinging a cutting tool and a workpiece,
Information on the relative feed amount per rotation of the cutting tool and the work, information on the relative number of oscillations per rotation of the cutting tool and the work, and relative relationship between the cutting tool and the work a condition acquiring unit that acquires one or two pieces of information as preconditions from among the following three types of information:
an air cut amount acquisition unit that acquires a specified air cut amount indicating the degree of air cut in the swinging direction;
Information that is not acquired by the condition acquisition unit out of the three pieces of information is selected so that the amount of air cut between the pass of n rotations and the pass of rotations after n rotations is equal to the designated amount of air cuts. A control device for a machine tool, comprising: a machining control unit that determines based on the preconditions and controls machining. The condition acquisition unit acquires, from among the three pieces of information, information on the feed amount and information on the number of oscillations as the preconditions,
The machining control unit controls the information on the feed amount and the number of oscillations so that the amount of air cut between a pass of n rotations and a pass of rotations after n rotations is equal to the designated air cut amount. 2. The machine tool control device according to claim 1, wherein the information regarding said swing amplitude is determined based on the information regarding said vibration amplitude. The condition acquisition unit acquires any one of the three pieces of information as the precondition, and acquires specific information indicating a condition for specifying the remaining two pieces of information,
The processing control unit controls any one of the information and the specific information so that an air cut amount based between a pass of n rotations and a pass of rotations after n rotations is equal to the designated air cut amount. 2. The machine tool controller according to claim 1, wherein said remaining two pieces of information are determined based on: The condition acquisition unit acquires taper information regarding a moving direction and a moving angle of the cutting tool,
4. The machine tool control device according to claim 1, wherein said machining control unit determines said feed amount using said taper information. A display device for a machine tool that performs machining while relatively swinging a cutting tool and a workpiece,
Information on the relative feed amount per rotation of the cutting tool and the work, information on the relative number of oscillations per rotation of the cutting tool and the work, and relative relationship between the cutting tool and the work a condition input unit that accepts input as a precondition for one or two of the following three types of information:
an air cut amount input unit that receives input of a specified air cut amount indicating the degree of air cut in the swinging direction;
The information that the condition input unit does not accept among the three pieces of information is selected so that the amount of air cut between the pass of n rotations and the pass of rotations subsequent to n rotations is equal to the specified amount of air cuts. an information calculation unit that calculates based on preconditions;
A display device for a machine tool, comprising: a display unit for displaying information calculated by the information calculation unit.

Images