Display device for machine tool

Abstract

The invention provides a technology capable of ascertaining the degree of a problem caused by a return operation in swing machining of a machine tool. A display device (1) for a machine tool includes: a machining condition acquisition unit (11) that acquires at least a frequency parameter and an amplitude parameter as machining conditions for performing swing machining; a speed calculation unit (12) that calculates, on the basis of at least the frequency parameter and the amplitude parameter, a minimum feed speed, which is the minimum among the speeds that change due to the swing operation; and a display control unit (15) that displays an image based on the minimum feed speed on a display unit (20).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a display device of a machine tool. BACKGROUND

[0002] In the past, in a machine tool that performs swing machining to chop chips by swinging a tool with respect to a work, in order to set machining conditions, a technique of displaying various parameters such as a feed rate is known (for example, Patent Literature 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2023-000009 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In swing machining, since a swing motion is superimposed on a normal cutting motion, the feed rate constantly varies. In a case where the maximum speed at the time of the forward motion cannot be grasped, the operator cannot appropriately select a tool, and cannot appropriately set parameters for vibration machining. In this regard, in the technique described in Patent Literature 1, the operator can confirm the maximum speed in the swing motion by display.

[0008] However, the generation of a return motion at the time of swing with a minimum speed being negative can cause the generation of fretting wear, deterioration of position accuracy due to backlash, and the generation of impact. The problems that occur due to such a return motion are difficult to grasp only by display of the maximum speed.

[0009] The present disclosure was made in view of the above-described problems, and aims to provide a technique capable of grasping the degree of problems that occur due to a return motion in swing machining of a machine tool.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] The present disclosure is a display device of a machine tool that performs swing machining while swinging a cutting tool with respect to a work, and includes: a machining condition acquisition section that acquires at least a frequency parameter and an amplitude parameter as machining conditions for performing the swing machining; a speed calculation section that calculates, based on at least the frequency parameter and the amplitude parameter, a minimum feed rate that is the minimum of speeds that vary due to a swing motion; and a display control section that displays, on a display section, an image based on the minimum feed rate. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a functional block diagram of a display device of a machine tool according to a first embodiment.

[0013] Figure 2is a flowchart showing an example of a processing flow of display control of the display device of the first embodiment.

[0014] Figure 3 is an example of an image in which the minimum feed rate and the maximum feed rate based on the swing frequency and the swing amplitude are displayed on the display section by the display device.

[0015] Figure 4 is an example of an image in which the minimum feed rate and the maximum feed rate based on the swing frequency ratio and the swing amplitude ratio are displayed on the display section by the display device.

[0016] Figure 5 is a flowchart showing an example of a processing flow of display control of the display device of the second embodiment.

[0017] Figure 6 is an example of an image in which the swing component rate based on the swing frequency and the swing amplitude is displayed on the display section by the display device.

[0018] Figure 7 is an example of an image in which the swing component rate based on the swing frequency ratio and the swing amplitude ratio is displayed on the display section by the display device. DETAILED DESCRIPTION

[0019] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In addition, in the description of the second and subsequent embodiments, the same reference numerals are assigned to the structures common to the first embodiment, and the description thereof will be appropriately omitted.

[0020] [First Embodiment]

[0021] Figure 1 is a functional block diagram of the display device 1 of the machine tool of the first embodiment. The display device 1 of the first embodiment is a computer that displays various information of a machine tool that performs swing machining while swinging a cutting tool with respect to a workpiece on a display section 20. The display device 1 is used in connection with, for example, a computer that controls the machine tool, that is, a control device not shown.

[0022] The machine tool performs machining of a workpiece by a cutting tool by causing at least one spindle that rotates the cutting tool with respect to the workpiece and at least one feed shaft that moves the cutting tool with respect to the workpiece to act. The machine tool performs various machining according to a machining program.

[0023] The machine tool can perform a swing operation in which the speed, including the forward speed, the reverse speed, and the like, is constantly switched. Alternatively, the machine tool can perform a swing operation in which the speed is varied in a sinusoidal curve shape. In the following description, the control of the machine tool in which the speed is varied in a sinusoidal curve shape is adopted.

[0024] Further, in the machining of the machine tool of the present embodiment, the shape of the workpiece is not limited. That is, even in the case where the machined surface of the workpiece has a tapered portion or a circular arc portion and a plurality of feed axes (Z-axis and X-axis) are required, and in the case where the workpiece is cylindrical or cylindrical and the feed axis is a specific one axis (Z-axis) is sufficient, the present application can be applied.

[0025] The hardware structure of the display device 1 of the machine tool will be described. The display device 1 is constituted, for example, using a computer which has a memory such as a ROM (read only memory), a RAM (random access memory), a CPU (control processing unit), and a communication control section connected to each other via a bus. In addition, the display device 1 has a display section 20 which displays various information and an input section 21 which is used by an operator to input various information. The display section 20 is constituted, for example, by a display which displays various information. The input section 21 is, for example, an operation unit such as a touch panel, a keyboard, a button, and the like.

[0026] The display device 1 of the machine tool can be constituted as a CNC (Computer Numerical Controller), and can also be connected to an upper computer (not shown) such as a CNC, a PLC (Programmable Logic Controller), and the like. In addition to the machining program, machining conditions such as a rotational speed and the like can be input from the upper computer to the display device 1 of the machine tool.

[0027] Next, the functional sections implemented by the display device 1 will be described. The display device 1 has a machining condition acquisition section 11, a speed calculation section 12, and a display control section 15 as functional sections. These functional sections of the display device 1 are implemented by cooperation of the above-described CPU, the memory, and a control program stored in the memory.

[0028] The machining condition acquisition section 11 is a machining condition acquisition function which acquires machining conditions for performing swing machining. The machining conditions can be, for example, conditions input to the display device 1 by an operator through the input section 21, an external computer, or the like in accordance with the display of the display section 20 of the display device 1, or can be conditions automatically acquired from a machining program or a set parameter of the machine tool, and the like.

[0029] The machining conditions include information required for machining such as spindle rotation speed (1 / min), feed amount per one rotation of the spindle (mm / rev), workpiece diameter (mm), command position of the feed axis, and swing conditions. In addition, the feed amount per one rotation of the spindle (mm / rev) can be calculated by the combination of the rotation speed of the spindle (1 / min) and the feed speed of the cutting tool (mm / min).

[0030] The swing conditions included in the machining conditions will be described. In the swing conditions, as information for uniquely determining a vibration waveform, at least a parameter of a frequency related to the swing frequency of the cutting tool or the workpiece and a parameter of an amplitude related to the swing amplitude of the cutting tool or the workpiece are included. The frequency parameter can be the number of vibrations per one rotation of the relative movement of the cutting tool and the workpiece, or the number of vibrations per unit time. In addition, it can be a cycle parameter of the forward and backward movement. The amplitude parameter can be information related to the swing amplitude corresponding to the feed amount per one rotation of the relative movement of the cutting tool and the workpiece, or a distance parameter of the forward and backward movement. These cycle parameter of the forward and backward movement and distance parameter of the forward and backward movement can be determined depending on the forward speed, the backward speed, the forward distance, the backward distance, the spindle rotation speed, the control cycle, and the like. The frequency parameter and the amplitude parameter can also be determined depending on the spindle rotation speed, the feed speed per rotation, the feed speed per minute, the number of vibrations per one rotation of the relative movement of the cutting tool and the workpiece, i.e., the frequency ratio, the swing amplitude corresponding to the feed amount per one rotation of the relative movement of the cutting tool and the workpiece, i.e., the amplitude ratio, and the like.

[0031] In the present embodiment, as the parameter of the frequency, the swing frequency f (Hz) per one rotation of the spindle and the swing frequency ratio I (times) are used. The swing frequency ratio I (times) can be directly designated, or can be calculated from the swing frequency (Hz) and the rotation speed S (1 / min) of the spindle on the basis of the designated swing frequency (Hz).

[0032] In addition, as the parameter of the amplitude, the swing amplitude A (mm) corresponding to the magnitude of the feed amount per one rotation of the spindle and the swing amplitude ratio K (times) indicating the magnitude of the swing amplitude are used. In addition, the swing amplitude ratio K (times) can also be directly designated as well.

[0033] The speed calculation section 12 is a speed calculation function that calculates the feed speed of the feed axis of the swing movement from the machining conditions. The speed calculation section 12 calculates the feed speed using at least the frequency parameter and the amplitude parameter included in the machining conditions.

[0034] The speed calculating section 12 of the present embodiment calculates the speed that varies due to the wobbling operation, based on at least the frequency parameter and the amplitude parameter. In this example, the speed calculated by the speed calculating section 12 is the actual operation speed after superimposing the wobbling operation on the constant feed. In addition, the speed that varies due to the wobbling operation includes the minimum speed and the maximum speed among the calculated speeds.

[0035] The display control section 15 is a display control function that displays various information of the display device 1, information of the input result to the operator, on the display section 20. In addition, the display control section 15 performs display control to display an image based on the minimum feed speed calculated by the speed calculating section 12 on the display section 20. In addition, the display control section 15 can perform display control to display the maximum feed speed calculated by the speed calculating section 12 together with the minimum speed on the display section 20.

[0036] Next, the processing flow of the display control will be described with reference to Figure 2 The processing flow of the display control of the display device 1 of the first embodiment will be described with reference to the flowchart of Fig. 6. Note that the order and contents of the processing shown in the flowchart are merely one example, and the order and contents of the processing can be appropriately changed. Figure 2

[0037] First, the machining condition acquiring section 11 acquires machining conditions from the input of the operator or the machining program, parameters of the machine tool (step Sll). The machining conditions acquired by the machining condition acquiring section 11 are, for example, a feed speed F (mm / rev) indicating a feed amount, a spindle speed S (min -1 ), a wobbling frequency f (Hz) or a wobbling frequency ratio I (times) as a frequency parameter, a wobbling amplitude A (mm) or a wobbling amplitude ratio K (times) as a wobbling parameter, and the like.

[0038] Next, the speed calculating section 12 calculates the minimum feed speed and the maximum feed speed from the machining conditions acquired by the machining condition acquiring section 11 (step S12). In this example, the speed calculating section 12 calculates the minimum feed speed and the maximum feed speed from the frequency parameter and the amplitude parameter included in the machining conditions.

[0039] An example in which the speed calculating section 12 calculates the feed speed using the wobbling frequency f (Hz) as a frequency parameter and the wobbling amplitude A (mm) as an amplitude parameter will be described. In this case, the speed calculating section 12 calculates the minimum feed speed based on the following mathematical expression (1), and calculates the maximum feed speed based on the following mathematical expression (2).

[0040] [Mathematical Expression 1]

[0041]

[0042] ​[Math. 2]

[0043]

[0044] An example in which the speed calculating section 12 calculates the feed speed using the swing frequency ratio I (times) as a frequency parameter and the swing amplitude ratio K (times) as an amplitude parameter will be described. In this case, the speed calculating section 12 calculates the minimum feed speed based on the following mathematical expression (3) and calculates the maximum feed speed based on the following mathematical expression (4).

[0045] [Math. 3]

[0046]

[0047] [Math. 4]

[0048]

[0049] Next, the display control section 15 performs display control to display an image containing the minimum feed speed and the maximum feed speed calculated by the speed calculating section 12 on the display section 20 (step S13). In the present embodiment, the display control section 15 displays the minimum feed speed and the maximum feed speed on the same display screen of the display section 20.

[0050] Referring to Figure 3 and Figure 4 , the image displayed on the display section 20 by the display control section 15 will be described.

[0051] Figure 3 An example of an image in which the minimum feed speed and the maximum feed speed based on the swing frequency f and the swing amplitude A are displayed on the display section 20 by the display device 1 is shown. In the image shown in Figure 3 The machining condition display 51, the swing condition display 52, and the machining state display 53 are contained in the image shown in

[0052] The feed speed F and the spindle speed S are displayed in the machining condition display 51 as contents indicating machining conditions. The swing frequency f and the swing amplitude A are displayed in the swing condition display 52 as contents indicating the swing condition contained in the machining conditions. The minimum feed speed F as a result of calculation by the speed calculating section 12 based on the mathematical expression (1) and the maximum feed speed F as a result of calculation by the speed calculating section 12 based on the mathematical expression (2) are displayed in the machining state display 53.

[0053] Figure 4 An example of an image in which the minimum feed speed and the maximum feed speed based on the swing frequency ratio I and the swing amplitude ratio K are displayed on the display section by the display device 1 is shown. In the image shown in Figure 4The illustrated image includes a machining condition display 61, a swing condition display 62, and a machining state display 63.

[0054] In the machining condition display 61, a feed speed F and a spindle speed S as feed amounts are displayed as contents indicating machining conditions. In the swing condition display 62, a swing frequency ratio I and a swing amplitude ratio K are displayed as contents indicating swing conditions included in machining conditions. In the machining state display 63, a minimum feed speed F as a calculation result of the speed calculation section 12 based on equation (3) and a maximum feed speed F as a calculation result of the speed calculation section 12 based on equation (4) are displayed.

[0055] The display device 1 of the machine tool that performs swing machining while relatively swinging the cutting tool with respect to the workpiece according to the first embodiment has the following effects.

[0056] The display device 1 of the machine tool according to the present embodiment has a machining condition acquisition section 11 that acquires at least a frequency parameter and an amplitude parameter as machining conditions for performing swing machining, a speed calculation section 12 that calculates at least a minimum feed speed that is the minimum of speeds that change due to swing motion, based on at least the frequency parameter and the amplitude parameter, and a display control section 15 that displays an image based on the minimum feed speed on a display section 20.

[0057] Thus, the minimum feed speed related to the degree of problems caused by return motion and the like is automatically calculated based on machining conditions and displayed on the display section 20. Therefore, the degree of problems caused by return motion can be easily grasped.

[0058] In addition, in the present embodiment, the speed calculation section 12 calculates at least a maximum feed speed that is the maximum of speeds that change due to swing motion, based on at least the frequency parameter and the amplitude parameter, and the display control section 15 displays the minimum feed speed and the maximum feed speed on the same display section 20. Thus, the maximum feed speed is automatically calculated and displayed in addition to the minimum feed speed, so the operator can easily grasp the variation range (rough change) of the speed in swing machining. In addition, sometimes a recommended feed speed is set for each tool or each workpiece. In this regard, according to the structure of the present embodiment, the variation range of the speed can be grasped, so the operator can easily confirm whether the change in the feed speed converges within the recommended range.

[0059] [Second Embodiment]

[0060] Next, a display device 1 of a second embodiment that performs display control different from that of the first embodiment will be described. The structure of the display device 1 of the second embodiment is the same as that of the first embodiment. In the second embodiment, the speed calculating section 12 calculates the minimum feed speed by the swing component speed, which is different from the first embodiment.

[0061] Figure 5 is a flowchart showing an example of a processing flow of the display control of the display device of the second embodiment. In the second embodiment, the machining condition acquiring section 11 acquires the swing condition from the input of the operator or the machining program, the parameters of the machine tool (step S21). The swing condition acquired by the machining condition acquiring section 11 is, for example, a swing frequency f (Hz) or a swing frequency ratio I (times) as a frequency parameter, a swing amplitude A (mm) or a swing amplitude ratio K (times) as a swing parameter, and the like. In addition, in a case where the swing frequency ratio I (times) and the swing amplitude ratio K (times) are acquired as the swing condition by the machining condition acquiring section 11, the feed speed F (mm / rev) and the spindle speed S (min -1 ).

[0062] Next, the speed calculating section 12 calculates the swing component speed based on the swing condition acquired by the machining condition acquiring section 11 (step S22). For example, in a case where the machine tool that is the control target of the display device 1 performs cutting processing with swing in a manner of superimposing the swing component on the constant feed, the speed calculating section 12 calculates the speed of the swing component itself that is superimposed as the swing component speed. In this example, the speed calculating section 12 calculates the swing component speed based on the frequency parameter and the amplitude parameter included in the swing condition.

[0063] An example in which the speed calculating section 12 calculates the swing component speed using the swing frequency f (Hz) as the frequency parameter and the swing amplitude A (mm) as the amplitude parameter will be described. In this example, the speed calculating section 12 calculates the absolute value of the maximum swing component speed in the absolute value of the speed that changes due to the swing operation based on the following mathematical expression (5). In the present embodiment, a structure in which the speed varies in a sinusoidal curve shape is adopted, and thus the absolute values of the positive and negative maximum values of the swing component speed are the same. Further, even in a structure in which the swing component speed varies in a triangular wave shape, the same can be applied in a case where the absolute values of the positive and negative maximum values of the swing component speed that change due to the swing operation are the same.

[0064] [Mathematical Expression 5]

[0065]

[0066] An example in which the speed calculating section 12 calculates the wobble component speed using the wobble frequency ratio I (times) as a frequency parameter and the wobble amplitude ratio K (times) as an amplitude parameter will be described. In this case, the speed calculating section 12 calculates the absolute value of the maximum wobble component speed among the absolute values of the speed that changes due to the wobble operation based on the following equation (6), and calculates the maximum feed speed based on equation (6).

[0067] [Equation 6]

[0068]

[0069] Next, the display control section 15 performs display control to display an image that contains the wobble component speed calculated by the speed calculating section 12 on the display section 20 (step S23). In the present embodiment, the display control section 15 displays the absolute value of the wobble component speed on the same display screen of the display section 20.

[0070] Referring to Figure 6 and Figure 7 , the image displayed on the display section 20 by the display control section 15 will be described.

[0071] Figure 6 An example of an image in which the wobble component speed based on the wobble frequency f and the wobble amplitude A is displayed on the display section 20 by the display device 1 is shown. The image shown in Figure 6 contains a wobble condition display 72 and a machining state display 73. In the wobble condition display 72, the wobble frequency f and the wobble amplitude A are displayed as contents that indicate the wobble condition. In the machining state display 73, the wobble component speed that is the result of the calculation by the speed calculating section 12 based on equation (5) is displayed in absolute value.

[0072] Figure 7 An example of an image in which the wobble component speed based on the wobble frequency ratio and the wobble amplitude ratio is displayed on the display section 20 by the display device 1 is shown. The image shown in Figure 7 contains a machining condition display 81, a wobble condition display 82, and a machining state display 83.

[0073] The feed speed F and the spindle speed S, which are also the reference feed speed, are displayed in the machining condition display 81 as contents that indicate the machining condition. In the wobble condition display 82, the wobble frequency ratio I and the wobble amplitude ratio K are displayed as contents that indicate the wobble condition included in the machining condition. In the machining state display 63, the wobble component speed that is the result of the calculation by the speed calculating section 12 based on equation (6) is displayed in absolute value.

[0074] As explained above, in the second embodiment, the speed calculation unit 12 calculates the minimum feed rate as the oscillation component speed (e.g., ) that does not include the constant reference feed rate component that serves as the reference for the oscillating motion. Figure 6 The processing status is displayed as 73. Figure 7 The processing status display shows the oscillation speed of 83. Therefore, the degree of problems caused by return motion, etc., can be understood in more detail based on the oscillation component speed.

[0075] Furthermore, in the second embodiment, the display control unit 15 displays the oscillation component speed using absolute values. Therefore, when the minimum and maximum speeds are the same, the speed variation between the maximum and minimum values ​​can be represented solely by displaying the absolute values. This reduces display costs compared to displaying both the minimum and maximum feed rates.

[0076] Furthermore, in the second embodiment, the processing condition acquisition unit 11 acquires a constant reference feed rate that serves as the reference for the oscillating motion, and the display control unit 15 displays the oscillating component speed and the reference feed rate (e.g., ... Figure 7 The processing conditions (including the feed rate of the 81) are displayed on the same display unit 20. Therefore, based on both the oscillating component speed and the reference feed rate, the maximum and minimum speeds of the actual operation can be easily determined, display costs can be reduced, and the range of speed variations during oscillating processing and the extent of problems caused by the return motion can be monitored in more detail.

[0077] Furthermore, the method for calculating the oscillation component speed is not configured in the above embodiment. When the machine tool, which is the object controlled by the display device 1, performs cutting operations accompanied by oscillation by controlling the actual forward and backward speeds, the speed calculation unit 12 can also calculate a constant reference feed rate as a reference based on the average of the total forward and backward speeds, and calculate the oscillation component speed by subtracting this constant reference feed rate.

[0078] In addition, in the second embodiment, the oscillating component speed is displayed as an absolute value, but it is not limited to this structure. For example, the oscillating component speed can be displayed as the minimum feed speed, and the speeds that assign positive or negative values ​​to the oscillating component speed can be displayed as the minimum feed speed and the maximum feed speed.

[0079] In addition, in the second embodiment, an example of displaying the oscillation component speed as the minimum feed rate and the maximum feed rate was described, but it is also possible to further add a display that changes in real time corresponding to the actual oscillation machining.

[0080] Furthermore, this disclosure is not limited to the above-described embodiments and variations; variations and improvements within the scope of achieving the purpose of this disclosure are also included in this disclosure.

[0081] With respect to the above-described embodiments and modifications, the following supplementary notes are also disclosed.

[0082] (Supplementary Note 1)

[0083] A display device (1) of a machine tool that performs swing cutting while oscillating a cutting tool relative to a workpiece,

[0084] The display device of the machine tool includes:

[0085] a machining condition acquisition section (11) that acquires at least a frequency parameter and an amplitude parameter as machining conditions for performing the swing cutting;

[0086] a speed calculation section (12) that calculates, based on at least the frequency parameter and the amplitude parameter, a minimum feed rate that is a minimum of speeds that vary due to a swing motion; and

[0087] a display control section (15) that displays, on a display section (20), an image based on the minimum feed rate.

[0088] (Supplementary Note 2)

[0089] In the above-described display device (1),

[0090] the speed calculation section (12) calculates, based on at least the frequency parameter and the amplitude parameter, a maximum feed rate that is a maximum of the speeds that vary due to the swing motion,

[0091] the display control section (15) displays, on the same display section (20), the minimum feed rate and the maximum feed rate.

[0092] (Supplementary Note 3)

[0093] In the above-described display device (1),

[0094] the speed calculation section (12) calculates the minimum feed rate as a swing component speed that does not include a component of a constant reference feed rate that is a reference of the swing motion.

[0095] (Supplementary Note 4)

[0096] In the above-described display device (1),

[0097] the display control section (15) displays the swing component speed as an absolute value.

[0098] (Supplementary Note 5)

[0099] In the above-described display device (1),

[0100] The processing condition acquisition section (11) acquires a constant reference feed rate that becomes a reference of the swing operation,

[0101] The display control section (15) displays the swing component speed and the reference feed rate in the same display section (20).

[0102] (Addendum 6)

[0103] A display device (1) of a machine tool that performs swing processing by superimposing a swing command of a sinusoidal shape on a constant feed or a swing command of a triangular wave shape in which a minimum feed rate and a maximum feed rate are the same, while swinging a cutting tool relative to a workpiece,

[0104] The display device of the machine tool includes:

[0105] A processing condition acquisition section (11) that acquires at least a frequency parameter and an amplitude parameter as processing conditions for performing the swing processing;

[0106] A speed calculation section (12) that calculates a maximum absolute value speed from among absolute values of a variable speed of the swing command, based on at least the frequency parameter and the amplitude parameter; and

[0107] A display control section (15) that displays an image based on the maximum absolute value speed on a display section.

[0108] (Addendum 7)

[0109] In the display device (1) of Addendum 6 described above,

[0110] The processing condition acquisition section (11) acquires a constant reference feed rate that becomes a reference of the swing operation,

[0111] The display control section (15) displays a swing component speed that does not include a component of the reference feed rate and the reference feed rate in the same display section (20).

[0112] Explanation of Reference Numerals

[0113] 1 Display device of machine tool

[0114] 11 Processing condition acquisition section

[0115] 12 Speed calculation section

[0116] 15 Display control section

[0117] 20 Display section.

Claims

1. A display device for a machine tool, wherein the machine tool performs oscillating machining while oscillating the cutting tool relative to the workpiece, characterized in that, The machine tool's display device includes: The processing condition acquisition unit acquires at least frequency parameters and amplitude parameters as processing conditions for performing the oscillating processing; The speed calculation unit calculates, at least based on the frequency parameter and the amplitude parameter, the minimum feed speed among the speeds that change due to the oscillating motion; as well as The display control unit displays an image based on the minimum feed rate on the display unit.

2. The display device for a machine tool according to claim 1, characterized in that, The speed calculation unit, based at least on the frequency parameter and the amplitude parameter, also calculates the maximum feed rate, which is the largest among the speeds that change due to the oscillating motion. The display control unit displays the minimum feed rate and the maximum feed rate on the same display unit.

3. The display device for a machine tool according to claim 1 or 2, characterized in that, The speed calculation unit calculates the minimum feed rate as the oscillation component speed, which does not include a constant reference feed rate that serves as the reference for the oscillation motion.

4. The display device for a machine tool according to claim 3, characterized in that, The display control unit displays the speed of the oscillation component using absolute values.

5. The display device for a machine tool according to claim 3 or 4, characterized in that, The processing condition acquisition unit acquires a constant reference feed rate that serves as the reference for the oscillating motion. The display control unit displays the oscillation component speed and the reference feed speed on the same display unit.

6. A display device for a machine tool, wherein the machine tool performs oscillating machining by superimposing a sinusoidal oscillation command on a constant feed rate or a triangular wave oscillation command in which the minimum and maximum feed rates are the same. Its features are, The machine tool's display device includes: The processing condition acquisition unit acquires at least frequency parameters and amplitude parameters as processing conditions for performing the oscillating processing; The speed calculation unit calculates, at least based on the frequency parameter and the amplitude parameter, the maximum absolute value speed among the absolute values ​​of the speed changes of the swing command; as well as The display control unit displays an image based on the maximum absolute value of the velocity.

7. The display device for a machine tool according to claim 6, characterized in that, The machining condition acquisition unit acquires a constant reference feed rate that serves as the reference for the oscillating motion. The display control unit displays the oscillation component speed, which does not include the reference feed speed, and the reference feed speed on the same display unit.

Images