JP6943556B2 - Machining path calculation device, machining path calculation method and computer program - Google Patents

Description

The present invention relates to a machining path calculation device for calculating a path of a spindle for machining a work, a machining path calculation method, and a computer program.

When a machine tool processes a workpiece, the arithmetic unit calculates the machining path of the spindle before machining the workpiece, and calculates the shape (model) of the workpiece after machining based on the calculated machining path. The arithmetic unit generates the surface shape of the model based on the image data (rendering).

The arithmetic unit compares one pixel constituting the surface of the model with another pixel adjacent to the one pixel, obtains the rate of change of the normal vector, and calculates the rate of change in the orientation of the surface. The arithmetic unit assigns a color to each pixel corresponding to the rate of change in the orientation of the surface, in other words, the degree of unevenness of the surface. The operator can visually recognize the defect on the surface of the model (see, for example, Patent Document 1).

Japanese Patent No. 5666013

However, when the minimum unit of the rate of change is large, in other words, when the resolution of the rate of change is large, the operator may not be able to visually recognize the slight degree of unevenness on the model surface.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a machining path calculation device, a machining path calculation method, and a computer program capable of visually recognizing a slight degree of unevenness on the model surface.

The machining path calculation device according to the present invention is a machining path calculation device that calculates a machining path for machining a workpiece based on a plurality of command points that indicate the positions of the spindles, and obtains an evaluation cross section that intersects the machining path. Regarding the setting unit to be set, the intersection calculation unit that calculates the intersection of the evaluation cross section and the processing path set by the setting unit, and the intersection calculated by the intersection calculation unit, in the first region of the work surface after processing. A feature amount calculation unit that calculates a feature amount indicating the degree of unevenness, a first generation unit that generates first image data in the first region based on the feature amount calculated by the feature amount calculation unit, and the first generation unit. When the designation of the second area located in one area is accepted, the first area is based on the feature amount calculated by the feature amount calculation unit according to the feature amount indicating the degree of unevenness in the second area. It is characterized by including a second generation unit for generating the second image data in the above.

In the processing path calculation device according to the present invention, the first generation unit sets a color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the first region. The first image data is generated based on the set color, and the second generation unit corresponds to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region. The second image data is generated based on the set color.

The processing path calculation device according to the present invention relates to an intersection position correction unit that corrects the position of the intersection calculated by the intersection calculation unit and a first region of the work surface after processing with respect to the intersection corrected by the intersection position correction unit. A correction feature amount calculation unit that calculates a feature amount indicating the degree of unevenness in the above, and a third generation unit that generates first correction image data in the first region based on the feature amount calculated by the correction feature amount calculation unit. When the designation of the second region located in the first region is accepted, the feature quantity calculated by the correction feature quantity calculation unit is based on the feature quantity indicating the degree of unevenness in the second region. It is characterized by including a fourth generation unit that generates the second corrected image data in the first region.

In the processing path calculation device according to the present invention, the third generation unit sets a color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the first region. The first corrected image data is generated based on the set color, and the fourth generation unit sets each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region. The feature is that the corresponding color is set and the second corrected image data is generated based on the set color.

The processing path calculation device according to the present invention displays an image based on the first image data and an image based on the first corrected image data side by side on a display unit, and displays an image based on the second image data and the second corrected image. It is characterized in that images based on data are displayed side by side on a display unit.

The machining path calculation method according to the present invention is a machining path calculation method for calculating a machining path for machining a workpiece based on a plurality of command points instructing the position of a spindle, in which an evaluation cross section intersecting the machining path is obtained. Set, calculate the intersection of the set evaluation cross section and the processing path, calculate the feature amount indicating the degree of unevenness in the first region of the work surface after machining, and based on the calculated feature amount, calculate the intersection. When the first image data in the first region is generated and the designation of the second region located in the first region is accepted, the feature calculated according to the feature amount indicating the degree of unevenness in the second region. It is characterized in that the second image data in the first region is generated based on the quantity.

The computer program according to the present invention is a computer program that can be executed by a machining path calculation device that calculates a machining path for machining a workpiece based on a plurality of command points that indicate the positions of the spindles. An evaluation cross section that intersects the machining path is set, the intersection of the set evaluation cross section and the machining path is calculated, and the feature quantity indicating the degree of unevenness in the first region of the work surface after machining is calculated with respect to the calculated intersection. When the calculation is performed, the first image data in the first region is generated based on the calculated feature amount, and the designation of the second region located in the first region is accepted, the degree of unevenness in the second region is received. It is characterized in that the process of generating the second image data in the first region is executed based on the calculated feature amount according to the feature amount indicating.

In the present invention, with respect to the intersection of the evaluation cross section and the processing path, a feature amount indicating the degree of unevenness in the first region of the work surface after processing is calculated, and first image data corresponding to the calculated feature amount is generated. When the operator specifies the second region in the first region, the second image data in the first region is generated based on the feature amount indicating the degree of unevenness in the second region. The processing path calculation device generates the second image data based on the feature amount of the second region narrower than the first region.

In the present invention, the second generation unit sets the color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region. Since the color is set for each feature amount based on the maximum value and the minimum value of the feature amount in the second area narrower than the first area, it cannot be displayed by the first image data based on the feature amount in the first area. The operator can visually recognize the slight degree of unevenness in the second region.

In the present invention, the first corrected image data in the first region is generated with respect to the corrected intersection. When the designation of the second region located in the first region is accepted, the second corrected image data in the first region is generated based on the feature amount indicating the degree of unevenness in the second region. Since the correction of the intersection is reflected in the image data, the operator can visually recognize the degree of unevenness in consideration of the correction result.

In the present invention, with respect to the corrected intersection, the fourth generation unit sets the color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region. Since the color is set for each feature amount based on the maximum value and the minimum value of the feature amount in the second region narrower than the first region, the first one based on the feature amount in the first region with respect to the corrected intersection. The operator can visually recognize a slight degree of unevenness in the second region that could not be displayed by the image data.

In the present invention, since the image based on the first image data and the image based on the first corrected image data are displayed side by side, the operator determines the degree of unevenness of the work surface before and after the correction based on the feature amount of the first region. Can be compared. Further, since the image based on the second image data and the image based on the second corrected image data are displayed side by side, the operator should compare the degree of unevenness of the work surface before and after the correction based on the feature amount of the second region. Can be done.

In the machining path calculation device, the machining path calculation method, and the computer program according to the present invention, a feature amount indicating the degree of unevenness in the first region of the work surface after machining is calculated with respect to the intersection of the evaluation cross section and the machining path. , Generates the first image data corresponding to the calculated feature amount. When the operator specifies the second region in the first region, the second image data in the first region is generated based on the feature amount indicating the degree of unevenness in the second region. The processing path calculation device generates the second image data based on the feature amount of the second region narrower than the first region. The second image data can display a slight degree of unevenness in the second region, which could not be displayed by the first image data based on the feature amount of the first region.

It is a perspective view which shows the machine tool. It is a block diagram which shows the structure of the control device. It is a top view which shows the machining path and the evaluation cross section with respect to a work. It is a perspective view which shows the evaluation cross section with respect to a work. It is a schematic diagram which shows the command point and the intersection of the evaluation cross section and a processing path. It is a conceptual diagram which shows an example of the intersection table. It is explanatory drawing explaining the calculation method which calculates the feature amount of the intersection point on the evaluation cross section D. It is explanatory drawing explaining the 1st correction method of the intersection position on the evaluation cross section D. It is explanatory drawing explaining the 2nd correction method of the intersection position on the evaluation cross section. It is explanatory drawing explaining the correction method of a command point. It is a front view which shows an example of the display part for displaying the work shape after processing and the degree of unevenness of the work surface. It is a figure which shows an example of a color table. It is a front view which shows an example of the display part when the program list is called. It is a front view which shows an example of the display part which displayed the work W shape and the degree of unevenness of the work W surface based on the 1st image data and the 1st correction image data. It is a front view which shows an example of the display part which displays the state which operated the area designation button. It is a front view which shows an example of the display part which displays the 2nd area. It is a front view which shows an example of the display part which displayed the work W shape and the degree of unevenness of the work W surface based on the 2nd image data and the 2nd correction image data. It is a flowchart explaining the display process which displays the work W shape and the degree of unevenness of the work W surface. It is a figure which shows an example of the image which is displayed on the display part when the adjustment scale is operated.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings showing the machine tool according to the first embodiment. In the following description, the up / down, left / right, and front / back indicated by the arrows are used in the figure. FIG. 1 is a perspective view illustrating a machine tool.

The machine tool includes a rectangular base 1 extending back and forth. A work holding portion 3 for holding the work W (see FIG. 3) is provided on the front side of the upper portion of the base 1. The work holding portion 3 can rotate around the A-axis with the left-right direction as the axial direction and the C-axis with the vertical direction as the axial direction.

A support base 2 for supporting the column 4, which will be described later, is provided on the rear side of the upper part of the base 1. A Y-axis direction moving mechanism 10 that moves in the front-rear direction is provided on the upper portion of the support base 2. The Y-axis direction moving mechanism 10 includes two rails 11 extending in the front-rear direction, a Y-axis screw shaft 12, a Y-axis motor 13, and a bearing 14.

Rails 11 are provided on the left and right sides of the upper part of the support base 2. The Y-axis screw shaft 12 extends back and forth and is provided between the two rails 11. Bearings 14 are provided at the front end and the middle of the Y-axis screw shaft 12. The bearing provided in the middle part is not shown. The Y-axis motor 13 is connected to the rear end of the Y-axis screw shaft 12.

A nut (not shown) is screwed to the Y-axis screw shaft 12 via a rolling element (not shown). The rolling element is, for example, a ball. A plurality of sliders 15 are slidably provided on each rail 11. A moving plate 16 is connected to the upper part of the nut and the slider 15. The moving plate 16 extends in the horizontal direction. The rotation of the Y-axis motor 13 causes the Y-axis screw shaft 12 to rotate, the nut to move in the front-rear direction, and the moving plate 16 to move in the front-rear direction.

An X-axis direction moving mechanism 20 that moves in the left-right direction is provided on the upper surface of the moving plate 16. The X-axis direction moving mechanism 20 includes two rails 21 extending to the left and right, an X-axis screw shaft 22, an X-axis motor (not shown), and a bearing 24.

Rails 21 are provided on the front and rear surfaces of the upper surface of the moving plate 16. The X-axis screw shaft 22 extends to the left and right and is provided between the two rails 21. Bearings 24 are provided at the left end and the middle of the X-axis screw shaft 22. The description of the bearing provided in the middle of the X-axis screw shaft 22 is omitted. The X-axis motor is connected to the right end of the X-axis screw shaft 22.

A nut (not shown) is screwed to the X-axis screw shaft 22 via a rolling element (not shown). Grease is applied to the X-axis screw shaft 22. A plurality of sliders 26 are slidably provided on each rail 21. A column 4 is connected to the upper part of the nut and the slider 26. Column 4 has a columnar shape. The rotation of the X-axis motor causes the X-axis screw shaft 22 to rotate, the nut to move in the left-right direction, and the column 4 to move in the left-right direction.

A Z-axis direction moving mechanism 30 that moves in the vertical direction is provided on the front surface of the column 4. The Z-axis direction moving mechanism 30 includes two rails 31 extending vertically, a Z-axis screw shaft 32, a Z-axis motor 33, and a bearing 34.

Rails 31 are provided on the left and right sides of the front surface of the column 4. The Z-axis screw shaft 32 extends vertically and is provided between the two rails 31. Bearings 34 are provided at the lower end and the middle portion of the Z-axis screw shaft 32, respectively. The bearing provided in the middle part is not shown. The Z-axis motor 33 is connected to the upper end of the Z-axis screw shaft 32.

A nut (not shown) is screwed to the Z-axis screw shaft 32 via a rolling element (not shown). Grease is applied to the Z-axis screw shaft 32. A plurality of sliders 35 are slidably provided on each rail 31. The spindle head 5 is connected to the front portion of the nut and the slider 35. The rotation of the Z-axis motor 33 causes the Z-axis screw shaft 32 to rotate, the nut to move in the vertical direction, and the spindle head 5 to move in the vertical direction. The Z-axis motor 33, the Z-axis screw shaft 32, the nut, and the rolling element form a ball screw mechanism.

A spindle 5a extending vertically is provided in the spindle head 5. The spindle 5a rotates about the axis. A spindle motor 6 is provided at the upper end of the spindle head 5. A tool is attached to the lower end of the spindle 5a. The rotation of the spindle motor 6 causes the spindle 5a to rotate, and the tool to rotate. The rotated tool processes the work W held by the work holding portion 3.

The machine tool is equipped with a tool changer (not shown) for changing tools. The tool changing device replaces the tool housed in the tool magazine (not shown) with the tool mounted on the spindle 5a.

FIG. 2 is a block diagram illustrating the configuration of the control device 50. The control device 50 (machining path calculation device) includes a CPU 51, a storage unit 52, a RAM 53, and an input / output interface 54. The storage unit 52 is a rewritable memory, such as EPROM or EEPROM. The control device 50 controls the machine tool based on the control program stored in the storage unit 52. Intersection table storage unit 52 to be described later, the color table, the route number i, the command point P _k, and stores the intersection S _i ^d like (d, i, k is a natural number). The control device 50 may include a ROM in which a control program is stored in advance.

When the operator operates the operation unit 7, a signal is input from the operation unit 7 to the input / output interface 54. The operation unit 7 is, for example, a keyboard, a button, a touch panel, or the like. The input / output interface 54 outputs a signal to the display unit 8. The display unit 8 displays characters, figures, symbols, and the like. The display unit 8 is, for example, a liquid crystal display panel.

The control device 50 includes an X-axis control circuit 55 corresponding to the X-axis motor 23, a servo amplifier 55a, and a differentiator 23b. The X-axis motor 23 includes an encoder 23a. The X-axis control circuit 55 outputs a command indicating the amount of current to the servo amplifier 55a based on the command from the CPU 51. The servo amplifier 55a receives the command and outputs a drive current to the X-axis motor 23.

The encoder 23a outputs a position feedback signal to the X-axis control circuit 55. The X-axis control circuit 55 executes position feedback control based on the position feedback signal.

The encoder 23a outputs a position feedback signal to the differentiator 23b, and the differentiator 23b converts the position feedback signal into a velocity feedback signal and outputs the position feedback signal to the X-axis control circuit 55. The X-axis control circuit 55 executes speed feedback control based on the speed feedback signal.

The current detector 55b detects the value of the drive current output by the servo amplifier 55a. The current detector 55b feeds back the value of the drive current to the X-axis control circuit 55. The X-axis control circuit 55 executes current control based on the value of the drive current.

The control device 50 includes a Y-axis control circuit 56 corresponding to the Y-axis motor 13, a servo amplifier 56a, and a differentiator 13b. The Y-axis motor 13 includes an encoder 13a. The Y-axis control circuit 56 outputs a command indicating the amount of current to the servo amplifier 56a based on the command from the CPU 51. The servo amplifier 56a receives the command and outputs a drive current to the Y-axis motor 13.

The encoder 13a outputs a position feedback signal to the Y-axis control circuit 56. The Y-axis control circuit 56 executes position feedback control based on the position feedback signal.

The encoder 13a outputs a position feedback signal to the differentiator 13b, and the differentiator 13b converts the position feedback signal into a speed feedback signal and outputs the position feedback signal to the Y-axis control circuit 56. The Y-axis control circuit 56 executes speed feedback control based on the speed feedback signal.

The current detector 56b detects the value of the drive current output by the servo amplifier 56a. The current detector 56b feeds back the value of the drive current to the Y-axis control circuit 56. The Y-axis control circuit 56 executes current control based on the value of the drive current.

The control device 50 includes a Z-axis control circuit 57 corresponding to the Z-axis motor 33, a servo amplifier 57a, and a differentiator 33b. The Z-axis motor 33 includes an encoder 33a. The Z-axis control circuit 57 outputs a command indicating the amount of current to the servo amplifier 57a based on a command from the CPU 51. The servo amplifier 57a receives the command and outputs a drive current to the Z-axis motor 33.

The encoder 33a outputs a position feedback signal to the Z-axis control circuit 57. The Z-axis control circuit 57 executes position feedback control based on the position feedback signal.

The encoder 33a outputs a position feedback signal to the differentiator 33b, and the differentiator 33b converts the position feedback signal into a speed feedback signal and outputs the position feedback signal to the Z-axis control circuit 57. The Z-axis control circuit 57 executes speed feedback control based on the speed feedback signal.

The current detector 57b detects the value of the drive current output by the servo amplifier 57a. The current detector 57b feeds back the value of the drive current to the Z-axis control circuit 57. The Z-axis control circuit 57 executes current control based on the value of the drive current.

The control device 50 also executes feedback control on the spindle motor 6 in the same manner as the X to Z axis motors 23, 13, 33.

The machine tool includes a magazine motor 60 and a magazine control circuit 58. The tool magazine is driven by the rotation of the magazine motor 60. The magazine control circuit 58 controls the rotation of the magazine motor 60.

The storage unit 52 stores a processing program for processing the work W. The machining program has a plurality of command points P _k that indicate the position of the spindle 5a. k indicates the order of instructions constituting the machining program. The spindle 5a sequentially moves a plurality of command points P _k , and the tool mounted on the spindle 5a processes the work W.

The storage unit 52 stores the command point P _k in advance. The control device 50 sets a path (machining path α) in which the spindle 5a moves based on the _{plurality of command points P k.} The control device 50 executes the movement of the spindle 5a based on the machining path α.

The method of setting the processing path α will be described. FIG. 3 is a plan view illustrating the processing path α and the evaluation cross section for the work W, and FIG. 4 is a perspective view illustrating the evaluation cross section for the work W. In the figure, the X direction indicates the left-right direction, the Y direction indicates the front-rear direction, and the Z direction indicates the up-down direction. The shape of the work W in FIGS. 3 and 4 shows the shape after processing.

The control device 50 sets an evaluation cross section D ^d (d indicates a cross section number and is a natural number) with respect to the work W. As shown in FIG. 3, when most of the main shaft 5a reciprocates along the X direction, the processing path α becomes a path along the X direction. As shown in FIG. 3, the control device 50 sets a plurality of ^{evaluation cross sections D d along a direction substantially orthogonal to the machining path α.} The plurality of evaluation cross sections are arranged in the X direction. The operator instructs in advance that the processing path α is in the X direction.

FIG. 5 is a _{schematic diagram illustrating the intersection of the command point P k} , the evaluation cross section D ^d, and the processing path α, and FIG. 6 is a conceptual diagram showing an example of the intersection table. In FIGS. 5 and 6, "i" (i is a natural number) indicates a route number in the movement of the spindle 5a in the X direction. As shown in FIG. 5, for example, the route of route number 1 (i = 1) indicates a route moving from left to right, and the route of route number 2 (i = 2) wraps the route of route number 1 at the right end. The route that moves from right to left is shown. The same applies to route numbers 3 and below. The spindle 5a moves in the order of the route numbers. ● indicates a command point, and ○ indicates ^{an intersection of the evaluation cross section D d} and the processing path α. The arrow indicates the traveling direction of the processing path α.

As shown in FIG. 6, the control device 50, each evaluation section D ^d, the moving path P _k -P _k + ₁ calculates the intersection S _i ^d and the path number i, the intersection S _i ^d coordinates (X (Coordinates, Y coordinates and Z coordinates) and the movement path P _{k −} P _{k + 1} are associated and stored in the intersection table. The X coordinate is the coordinate in the X direction, the Y coordinate is the coordinate in the Y direction, and the Z coordinate is the coordinate in the Z direction.

The control device 50 obtains the feature amount of the intersection on the evaluation cross section D ^d by, for example, the following calculation method. FIG. 7 is an explanatory diagram illustrating a calculation method for calculating the feature amount of the intersection on the evaluation cross section D ^d. The control device 50 uses _{the Z coordinate of the target intersection S i} ^{d and} the Z coordinates of _{the intersection S i-1} ^d and the intersection S _{i + 1} d located on both sides of the _{intersection S i} ^d , respectively, to use the ^{intersection S i d.} Calculate the second-order intersection of _i ^d. The Z coordinate of the intersection S _i-1 ^d is larger than the Z coordinate of the intersection S _i ^d. The Z coordinate of the intersection S _{i + 1} ^d is smaller than the Z coordinate of the intersection S _i ^d.

Controller 50 calculates the intersection S _i ^d Z coordinate z _i ^d and the intersection point S _{i + 1} ^d coordinate z _{i + 1} ^d of the difference d _a of ^{_{(d a = z i d -z}} i + 1 d) , calculates the intersection point S _i-1 ^d coordinate z _i-1 ^d and the intersection point S _i ^d coordinate z _i ^d of the difference d _b of the _{(d b = z i-1} d -z i d). Controller 50, a difference d _a difference d _a and the difference d _b - calculates a difference d _b (second order differential). The control device 50 calculates the second-order difference as a feature amount for all the intersections except the intersections located at the ends in each evaluation cross section. The large / small size of the second-order difference corresponds to the large / small degree of unevenness on the work surface after processing.

The control device 50 corrects the intersection position on the evaluation cross section D ^d by, for example, the first correction method. FIG. 8 is an explanatory diagram illustrating a first method of correcting the intersection position on the evaluation cross section D ^d. The control device 50 corrects the intersection position so as to gradually change the coordinates in the Z direction, for example. For the intersection coordinates S _i ^d to be corrected, the correction points t using _{the intersection coordinates s i-2} ^d , s _i-1 ^d , s _{i + 1} ^d , and s _{i + 2} ^d of each of the two front and rear points. Determine _i ^d.

The Z coordinate values of the four intersection coordinates s _i-2 ^d , s _i-1 ^d , s _{i + 1} ^d , and s _{i + 2} ^d _{are z i-2} , z _i-1 , z _{i + 1} , z _{i. +2} , the Z coordinate value of the correction point t _i ^d _{is z i} ′, and the difference between the Z coordinate values is d ₁ = z _{i-2 −} z _i-1 , d ₂ = z _{i-1 −} z _i , d ₃ = z _i ′ − z _{i + 1} , d ₄ = z _{i + 1 −} z _{i + 2} . Calculate _{z i} ′ such that the double difference of Z coordinate values d ₁₂ ′, d ₂₃ ′, d ₃₄ ′ (difference of Z coordinate values d ₁ , d ₂ , d ₃ , d ₄ ) changes linearly. do.

The double difference d ₁₂ ′, d ₂₃ ′, and d ₃₄ ′ of the Z coordinate value can be obtained by the following equation.
d ₁₂ ′ ＝ d ₂ −d ₁ ＝ (zi _-1 −z _i ′) − (zi _-2 −z _i-1 ) ＝ 2 z _i-1 −z _i ′ − z _i-2・ ・ ・ ( 1)
d ₂₃ ′ ＝ d ₃ −d ₂ ＝ (z _i ′ − z _{i + 1} ) − (zi _-1 −z _i ′) ＝ 2 z _i ′ −z _{i + 1} −z _i-1 ··· (2 )
d ₃₄ ′ ＝ d ₄ −d ₃ ＝ (z _{i + 1} −z _{i + 2} ) − (z _i ′ _{− z i + 1} ) ＝ 2 z _{i + 1} −z _{i + 2} −z _i ′ ・ ・ (3)

Because these change linearly,
d ₂₃ ′ = (d ₁₂ ′ + d ₃₄ ′) / 2 ・ ・ ・ (4)
Meet.

Solving _{z i} ′ based on equations (1) to (4)
z _i ′ = (−z _i-2 + 4z _i-1 + 4z _{i + 1 −z i + 2} ) / 6
Will be.

Performing the correction for all the intersections S _i ^d on evaluation section D ^d. Note that only intersections whose Z coordinate values are far apart from the Z coordinate values of other intersections may be corrected.

The control device 50 corrects the intersection position on the evaluation cross section D ^d by, for example, a second correction method. FIG. 9 is an explanatory diagram illustrating a second method of correcting the intersection position on the evaluation cross section. In FIG. 9, u corresponds to the XY coordinates and v corresponds to the Z coordinates. The controller 50, for example using other multiple intersections surrounding the intersection S _i ^d to be corrected of the subject, to create a smooth curve (spline curves, Bezier curves, NURBS curve, etc.), the curved line The intersection S _i ^d to be corrected is projected onto.

When using the four intersections s _i-2 ^d , s _i-1 ^d , s _{i + 1} ^d , and s _{i + 2} ^d _{as a smooth curve, the interval s i-2} on the evaluation cross section D ^d (uv plane) ^d ~s _i-1 ^d, the interval ^{_{s i-1 d ~s i +}} 1 d, the interval ^{_{s i + 1 d ~s i +}} 2 d of each of the curve formula _{v 1 (u), v 2} (u), v ₃ (u) has the following equation.
v _j (u) = a _j (u-u _j ) ³ + b _j (u-u _j ) ² + c _j (u-u _j ) + d _j
(J = 1, 2, 3)

A controller based on the fact that the first and second derivatives pass through the intersections s _i-2 ^d , s _i-1 ^d , s _{i + 1} ^d , s _{i + 2} ^{d, and at the boundary point are continuous.} 50 can determine _{a j to} d _j.

Selection of the four intersection points as described above, not limited to the case of using a continuous two points located on both sides of the intersection S _i ^d. For example, intersections s _i-3 ^d , s _i-1 ^d , s _{i + 1} ^d , s _{i + 3} ^d may be selected discontinuously for every two points.

As shown in FIG. 9, the correction point t _i ^d position is a position on a smooth curve where the distance from the _{intersection point S i} ^{d to be corrected is the minimum.} Following the correction point t _i ^d is also referred to as a point of intersection t _i ^d. The control device 50 calculates the second-order difference _{of the intersection point t i} ^d as, for example, the corrected feature amount.

^{Let T d} be the corrected intersection group existing on the d-th evaluation cross section D ^d.
T ^d = {t _i ^d | d: section number, i: route number}

The control device 50 corrects the position of the command point by using ^{T d for the intersection group.} FIG. 10 is an explanatory diagram illustrating a method of correcting the command point. In FIG. 10, p _{a to p f} indicate command points.

For example, when the command point p _c is the correction target, as shown in FIG. 10A, the command point p _c is located between the cross section D ^d-1 and the cross section D ^d , and the route number is i. Controller 50 refers to the intersection table described above, to obtain the cross-sectional location and path numbers for command points p _c.

As shown in FIG. 10B, the intersection control device 50 surrounding the command point p _c, for example, four intersection points aligned on the machining path ^{_{α t i d + 1, t}} i d, t i d-1, t i d Search for ^-2. The control device 50 creates a smooth curve (spline curve, Bezier curve, NURBS curve, etc.) from _{four intersections t i} ^{d + 1} , t _i ^d , t _i ^d-1 , and t _i ^{d-2, and on the curve.} The command point p _c is projected onto, and the correction point p _c ′ is determined. The control device 50 obtains a smooth curve by the same method as the second correction method described above. The position of the correction point p _c ′ is the position on the smooth curve where the distance from the _{command point p c is the minimum.} The control device 50 similarly corrects the positions of the other command points.

The CPU 51 displays the shape of the work W after processing and the degree of unevenness on the surface of the work W on the display unit 8 based on the processing program. FIG. 11 is a front view showing an example of a display unit 8 for displaying the shape of the work W after processing and the degree of unevenness on the surface of the work W.

As shown in FIG. 11, when displaying the work W shape after processing and the degree of unevenness on the surface of the work W, the display unit 8 displays the first display screen for displaying the shape of the work W before correction and the degree of unevenness on the surface of the work W. 81, a second display screen 82 for displaying the corrected work W shape and the degree of unevenness on the work W surface, a program selection button 83 for selecting a machining program, an area designation button 84 for specifying an area, and an unevenness on the work W surface. A concavo-convex scale 85 indicating the degree, an adjustment scale 86 for adjusting the scale range of the concavo-convex scale 85, a display reset button 87 for resetting the display, and the like are displayed.

The first display scene 81 and the second display screen 82 are arranged side by side. The uneven scale 85 is arranged below the first display screen 81 and the second display screen 82. The uneven scale 85 includes a rectangular color display unit 85f extending to the left and right, a minimum value display unit 85a, a first intermediate value display unit 85b, a median value display unit 85c, a second intermediate value display unit 85d, and a maximum value display unit 85e. Be prepared. The minimum value display unit 85a, the first intermediate value display unit 85b, the median value display unit 85c, the second intermediate value display unit 85d, and the maximum value display unit 85e are arranged below the color display unit 85f and are in the initial state. Is blank in.

The minimum value display unit 85a, the first intermediate value display unit 85b, the median value display unit 85c, the second intermediate value display unit 85d, and the maximum value display unit 85e are the maximum value, the minimum value, the maximum value, and the maximum value of the feature amount in a predetermined area. Display the median between the minimums, the first intermediate between the minimums and the median, and the second intermediate between the maximums and the median.

FIG. 12 is a diagram showing an example of a color table. The storage unit 52 stores the color table. The color table shows the correspondence between the feature amount and the color ratio (red: green: blue). The color ratio of the minimum value of the feature amount is 0: 0: 1, which corresponds to blue. The color ratio of the first intermediate value is 0: 1: 1, which corresponds to cyan. The median color ratio is 0: 1: 0, which corresponds to green. The color ratio of the second intermediate value is 1: 1: 0, which corresponds to yellow. The maximum color ratio is 1: 0: 0, which corresponds to red.

The feature amount between the minimum value and the first intermediate value is 0:00 to 1: 1 and corresponds to blue to cyan. As the features increase, the proportion of green increases linearly. The feature quantity between the first intermediate value and the median is 0: 1: 1 to 0, which corresponds to cyan to green. As the features increase, the proportion of blue decreases linearly. The feature amount between the median and the second intermediate value is 0 to 1: 1: 0 and corresponds to green to yellow. The proportion of red increases linearly as the features increase. The feature amount between the second intermediate value and the maximum value is 1: 1 to 0: 0, and corresponds to yellow to red. As the features increase, the proportion of green decreases linearly.

The color display unit 85f displays the color corresponding to the color table. The color display unit 85f has blue, cyan, and green at locations corresponding to the minimum value display unit 85a, the first intermediate value display unit 85b, the median value display unit 85c, the second intermediate value display unit 85d, and the maximum value display unit 85e. , Yellow and red are displayed respectively. At the corresponding portion between the minimum value display unit 85a and the first intermediate value display unit 85b, the color is displayed so as to continuously change from blue to cyan. At the corresponding portion between the first intermediate value display unit 85b and the median value display unit 85c, the color is displayed so as to continuously change from cyan to green. The color is displayed so as to continuously change from green to yellow at the corresponding portion between the median value display unit 85c and the second intermediate value display unit 85d. At the corresponding portion between the second intermediate value display unit 85d and the maximum value display unit 85e, the color is displayed so as to continuously change from yellow to red.

The adjustment scale 86 includes an adjustment unit 86a for adjusting the minimum value and the maximum value used in the uneven scale 85, and a range display unit 86b indicating a range between the minimum value and the maximum value adjusted by the adjustment unit 86a. ..

FIG. 13 is a front view showing an example of the display unit 8 when the program list 90 is called. When displaying the shape of the work W after processing and the degree of unevenness on the surface of the work W, the operator operates the program selection button 83 by the operation unit 7 to call the program list 90.

The program list 90 includes a program display unit 91, a pre-correction button 92, a post-correction button 93, a pre-correction button 94, and a cancel button 95. The program display unit 91 shows one or a plurality of machining programs. The operator operates the operation unit 7 to select one of the machining programs.

When the operator operates the operation unit 7 to select the pre-correction button 92 after selecting the machining program, the CPU 51 recognizes the entire region of the work W as the first region R1, and based on the selected machining program, the first The feature amount of the intersection before correction in one region R1 is calculated, and the work W shape before correction and the degree of unevenness of the work W surface are displayed on the display unit 8. In other words, the first image data in the first region R1 is generated based on the feature amount indicating the degree of unevenness in the first region R1 on the surface of the work W after processing.

After selecting the machining program, when the operator operates the operation unit 7 to select the corrected button 93, the CPU 51 recognizes the entire area of the work W as the first area R1, and based on the selected machining program, the first The intersection before correction in the region R1 is corrected, the feature amount of the intersection after correction is calculated, and the first corrected image data in the first region R1 is generated. Based on the first corrected image data, the CPU 51 displays the corrected work W shape and the degree of unevenness on the work W surface on the display unit 8.

After selecting the machining program, when the operator operates the operation unit 7 to select the correction front / rear button 94, the CPU 51 recognizes the entire region of the work W as the first region R1 and described above based on the selected machining program. As described above, the feature amounts of the intersections before and after the correction in the first region R1 are calculated, the first image data and the first corrected image data are generated, and the first display screen 81 and the second display screen 82 are corrected. The degree of unevenness of the previous work W shape and the surface of the work W and the degree of unevenness of the corrected work W shape and the surface of the work W are displayed side by side.

When the operator selects the cancel button 95, the CPU 51 deletes the program list 90 from the display unit 8. Although the CPU 51 recognizes the entire area of the work W as the first area R1, an area narrower than the entire area may be recognized as the first area R1.

A case where the operator operates the operation unit 7 to select the correction front / rear button 94 after selecting the machining program will be described. FIG. 14 is a front view showing an example of the display unit 8 displaying the shape of the work W and the degree of unevenness on the surface of the work W based on the first image data and the first corrected image data.

The CPU 51 acquires the minimum value and the maximum value of the feature amount from the selected machining program, and calculates the first intermediate value, the second intermediate value, and the median value. For example, the calculation is as follows.
First intermediate value = minimum value + (maximum value-minimum value) / 4 ... (5)
Median = minimum value + (maximum value-minimum value) / 2 ... (6)
Second intermediate value = minimum value + 3 (maximum value-minimum value) / 4 ... (7)
The minimum and maximum values are the minimum and maximum values before correction.

For example, when the minimum value is −0.30547 and the maximum value is 0.34748, the first intermediate value, the median value, and the second intermediate value are −0.142223, 0.02101, and 0.18423, respectively. As shown in FIG. 14, the CPU 51 has a minimum value display unit 85a, a first intermediate value display unit 85b, a median value display unit 85c, a second intermediate value display unit 85d, and a maximum value display unit 85e of −0.30547, −. 0.14223, 0.02101, 0.18423, and 0.34748 are displayed, respectively.

The CPU 51 creates a color table based on the calculated minimum value, maximum value, first intermediate value, median value, and second intermediate value (see FIG. 12), and stores the color table in the storage unit 52. As shown in FIG. 14, the CPU 51 displays the work W shape before correction on the first display screen 81, and displays the work W shape after correction on the second display screen 82.

The CPU 51 calculates the feature amount of each part of the work W before the correction, refers to the color table stored in the storage unit 52, and displays the color corresponding to the calculated feature amount on the portion on the first display screen 81. It is displayed, and the degree of unevenness on the surface of the work W is displayed. The feature amount of each part of the work W before the correction and the color table stored in the storage unit 52 constitute the first image data. That is, the CPU 51 generates the first image data, and based on the generated first image data, displays the work W shape and the degree of unevenness on the work W surface on the first display screen 81.

Further, the feature amount of each part constituting the corrected work W is calculated, the color table stored in the storage unit 52 is referred to, and the color corresponding to the calculated feature amount is displayed on the portion on the second display screen 82. Display and check the degree of unevenness on the surface of the work W. The feature amount of each part of the work W after the correction and the color table stored in the storage unit 52 constitute the first corrected image data. That is, the CPU 51 generates the first corrected image data, and based on the generated first corrected image data, the work W shape and the degree of unevenness of the work W surface are displayed on the second display screen 82.

For example, the work W displayed on the first display screen 81 has a red region R, a yellow region Y, a cyan region C, and a blue region B, and the other regions are green regions G. For example, the work W displayed on the second display screen 82 has a yellow region Y and a cyan region C, and the other regions are green regions G. That is, by the correction, the feature amount of the red region R (feature amount near the maximum value) is changed to the feature amount of the yellow region Y (feature amount near the second intermediate value), and the feature amount of the blue region B (minimum value). The feature amount near the value) is changed to the feature amount in the cyan region C (feature amount near the first intermediate value).

FIG. 15 is a front view showing an example of a display unit 8 that displays a state in which the area designation button 84 is operated. The worker specifies the area of the work W as needed. As shown in FIG. 15, the operator operates the operation unit 7 to operate the area designation button 84. When the operator operates the area designation button 84, the CPU 51 starts accepting the area designation.

FIG. 16 is a front view showing an example of the display unit 8 displaying the second region R2. As shown in FIG. 16, the operator operates the operation unit 7 to specify the start point S and the end point E. The CPU 51 recognizes a square area whose diagonal line is a line connecting the start point S and the end point E as the second area R2, and displays the second area R2 on the display unit 8. The second region R2 is located within the first region R1.

FIG. 17 is a front view showing an example of a display unit 8 displaying the shape of the work W and the degree of unevenness on the surface of the work W based on the second image data and the second corrected image data. The CPU 51 calculates a feature amount for all the sampling points in the second region R2, sets the minimum feature amount among the calculated feature amounts to the minimum value used by the unevenness scale 85, and sets the maximum feature amount to the unevenness scale 85. Set to the maximum value used in.

The CPU 51 calculates the first intermediate value, the median value, and the second intermediate value, respectively, based on the minimum and maximum values of the feature amount in the second region R2 and the above-mentioned equations (5) to (7). For example, when the minimum value and the maximum value of the feature amount in the second region R2 are −0.10027 and 0.12430, respectively, the first intermediate value is −0.04413 and the median value is 0.01202. The second intermediate value is 0.06816. The CPU 51 creates a color table by associating the calculated minimum value, first intermediate value, median value, second intermediate value, and maximum value with blue, cyan, green, yellow, and red, and stores the stored unit 52. Remember (see FIG. 12).

The feature amount of each part of the work W before the correction and the color table stored in the storage unit 52 constitute the second image data. That is, the CPU 51 generates the second image data in the first region R1 before correction based on the feature amount indicating the degree of unevenness in the second region R2, and the first image data is based on the generated second image data. The shape of the work W and the degree of unevenness are displayed on the display screen 81. As shown in FIG. 17, the CPU 51 sets the minimum value, the first intermediate value, the median value, the second intermediate value, and the maximum value in the minimum value display unit 85a, the first intermediate value display unit 85b, the median value display unit 85c, and the maximum value. (Ii) Display on the intermediate value display unit 85d and the maximum value display unit 85e, respectively. The CPU 51 displays the color corresponding to the feature amount of each part in the first region R1 (the color corresponding to the feature amount in the color display unit 85f) on the portion on the first display screen 81, and determines the degree of unevenness of the work W. indicate.

Further, the feature amount of each part constituting the corrected work W is calculated, the color table stored in the storage unit 52 is referred to, and the color corresponding to the calculated feature amount is displayed on the portion on the second display screen 82. Display and check the degree of unevenness on the surface of the work W. The feature amount of each part of the work W after the correction and the color table stored in the storage unit 52 constitute the second corrected image data. That is, the CPU 51 generates the second corrected image data, and based on the generated second corrected image data, the work W shape and the degree of unevenness of the work W surface are displayed on the second display screen 82.

When the operator specifies the second area R2, the CPU 51 sets the maximum value and the minimum value set by the unevenness scale 85 from the maximum value and the minimum value in the first area R1 to the maximum value and the minimum value in the second area R2. To generate the second image data and the second corrected image data. The CPU 51 resets the color to be displayed on each part of the entire work W based on the second image data and the second corrected image data.

Before changing the maximum value and the minimum value, the entire second area R2 of the first display screen 81 was the green area G (see FIG. 16), but after changing the maximum value and the minimum value, the second area A red region R and a blue region B appeared in R2 (see FIG. 17). When the second area R2 is set, the CPU 51 sets a color for each feature amount based on the maximum value and the minimum value of the feature amount in the second area R2 narrower than the first area R1 and generates the second image data. do. Therefore, in the second image data, the operator can visually recognize a slight degree of unevenness in the second region R2, which could not be displayed in the first image data based on the feature amount of the first region R1.

The CPU 51 generates second corrected image data showing the corrected work W shape and the degree of unevenness in the first area R1 based on the feature amount of the second area R2. As shown in FIG. 17, the CPU 51 displays the corrected work W shape and the degree of unevenness on the work W surface on the second display screen 82 based on the second corrected image data.

FIG. 18 is a flowchart illustrating a display process for displaying the shape of the work W and the degree of unevenness on the surface of the work W. In the initial state, the display unit 8 displays the image shown in FIG. The CPU 51 determines whether or not the machining program has been called by operating the program selection button 83 (step S1). If the machining program is not called (step S1: NO), the process is returned to step S1. When the machining program is called (step S1: YES), the CPU 51 displays the program list 90 on the display unit 8 (see step S2, FIG. 13).

The CPU 51 determines which machining program displayed on the program display unit 91 has been selected by the operator (step S3). If any of the machining programs is not selected (step S3: NO), the CPU 51 determines whether or not the operator has operated the cancel button 95 (step S5). If the cancel button 95 is not operated (step S5: NO), the CPU 51 returns the process to step S3.

When the cancel button 95 is being operated (step S5: YES), the CPU 51 deletes the program list 90 from the display unit 8 (step S6), and returns the process to step S1.

When any machining program is selected in step S3 (step S3: YES), the CPU 51 determines whether or not the operator has operated the pre-correction button 92, the post-correction button 93, or the pre-correction button 94 (step S3). S4). When the operator does not operate the pre-correction button 92, the post-correction button 93, or the pre-correction button 94 (step S4: NO), the CPU 51 proceeds to step S5.

When the operator is operating the pre-correction button 92, the post-correction button 93, or the pre-correction button 94 (step S4: YES), the CPU 51 reads the selected machining program (step S7) and displays the feature amount of the work W. A color table is created by calculation and stored in the storage unit 52 (see step S8 and FIG. 12).

The CPU 51 displays the shape of the work W on the display unit 8, refers to the color table stored in the storage unit 52, displays the color corresponding to the feature amount of the work W on the work W, and displays the work W on the display unit 8. The degree of unevenness on the surface is displayed (step S9: see FIG. 14).

The CPU 51 determines whether or not the operator operates the area designation button 84, sets the start point S and the end point E, and executes the area (second area R2) designation (step S10). When the area designation is executed (see step S10: YES and FIGS. 15 and 16), the CPU 51 recreates the color table based on the feature amount of the second area R2 and stores it in the storage unit 52 (step S11). , Return the process to step S9. In step S9, the CPU 51 refers to the color table based on the feature amount of the second region R2 stored in the storage unit 52, and displays the work W shape and the degree of unevenness of the work W surface in the first region R1 (see FIG. 17). ). If the area designation is not executed (step S10: NO), the CPU 51 ends the process.

FIG. 19 is a diagram showing an example of an image displayed on the display unit 8 when the adjustment scale 86 is operated. The operator can operate the adjustment scale 86 via the operation unit 7 to change the maximum value or the minimum value in the color table.

For example, when the numerical value of the adjustment unit 86a or the length of the horizontally long rectangle of the range display unit 86b is changed and the minimum value of the adjustment scale 86 is changed to 25.0%, the initial maximum value and the minimum value are changed to the initial minimum value. The CPU 51 sets a value obtained by adding 25% of the difference between the values (that is, the initial first intermediate value) as the minimum value.

As shown in FIG. 14, when the initial minimum value is −0.30547, the initial maximum value is 0.34748, and the minimum value of the adjustment scale 86 is changed to 25.0%, FIG. 19 shows. As shown, the minimum value is −0.14222 (initial first intermediate value), and the CPU 51 recalculates the first intermediate value, the median value, and the second intermediate value, and recreates the color table. The operator can also change the maximum value of the adjustment scale 86.

In the machine tool control device according to the embodiment, a feature amount indicating the degree of unevenness in the first region R1 of the surface of the work W after machining was calculated and calculated with respect to the intersection of the evaluation cross section and the machining path α. The first image data corresponding to the feature amount is generated. When the operator specifies the second region R2 in the first region R1, the second image data in the first region R1 is generated based on the feature amount indicating the degree of unevenness in the second region R2. The processing path calculation device generates the second image data based on the feature amount of the second region R2 which is narrower than the first region R1. The second image data can display a slight degree of unevenness in the second region R2, which could not be displayed by the first image data based on the feature amount of the first region R1.

Further, the control device creates a color table based on the maximum value and the minimum value of the feature amount in the second region R2, and sets the color corresponding to each feature amount in the first region R1 based on the color table. .. Since the color is set for each feature amount based on the maximum value and the minimum value of the feature amount in the second area R2 narrower than the first area R1, the first image data based on the feature amount in the first area R1 The operator can visually recognize the slight degree of unevenness in the second region R2 that could not be displayed.

Regarding the corrected intersection, the first corrected image data in the first region R1 is generated. The CPU 51 displays the work W shape and the degree of unevenness on the work W surface on the second display screen 82 based on the first corrected image data. When the designation of the second region R2 located in the first region R1 is accepted, the second corrected image data in the first region R1 is generated based on the feature amount indicating the degree of unevenness in the second region R2. The CPU 51 displays the work W shape and the degree of unevenness on the work W surface on the second display screen 82 based on the second corrected image data. Since the correction of the intersection is reflected in the first and second corrected image data, the operator can visually recognize the degree of unevenness in consideration of the correction result.

Further, regarding the corrected intersection, the control device 50 sets a color corresponding to each feature amount in the first region R1 based on the maximum value and the minimum value of the feature amount in the second region R2. Since the color is set for each feature amount based on the maximum value and the minimum value of the feature amount in the second area R2 narrower than the first area R1, the corrected intersection point is based on the feature amount of the first area R1. The operator can visually recognize a slight degree of unevenness in the second region R2, which could not be displayed by the first image data.

Further, an image based on the image data before correction (first image data) generated based on the feature amount of the first region R1 and an image data after correction generated based on the feature amount of the first region R1 (first image data). Since the images based on (1 corrected image data) are displayed side by side on the first display screen 81 and the second display screen 82, the degree of unevenness on the surface of the work W based on the feature amount of the first region R1 before and after the correction can be determined. Workers can compare. Further, an image based on the image data before correction (second image data) generated based on the feature amount of the second region R2 and an image data after correction generated based on the feature amount of the second region R2 (second image data). Since the images based on (2 corrected image data) are displayed side by side on the first display screen 81 and the second display screen 82, the degree of unevenness on the surface of the work W based on the feature amount of the second region R2 before and after the correction can be determined. Workers can compare.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The technical features described in each example can be combined with each other and the scope of the invention is intended to include all modifications within the claims and scope equivalent to the claims. Will be done.

5a Main shaft 7 Operation unit 8 Display unit 50 Control device (machining path calculation device)
51 CPU
52 Storage unit 53 RAM

Claims (5)

In a machining path calculation device that calculates a machining path for machining a workpiece based on a plurality of command points that indicate the position of the spindle.
A setting unit that sets an evaluation cross section that intersects the machining path,
An intersection calculation unit that calculates the intersection of the evaluation cross section and the processing path set by the setting unit, and the intersection calculation unit.
With respect to the intersection calculated by the intersection calculation unit, a feature amount calculation unit that calculates a feature amount indicating the degree of unevenness in the first region of the work surface after processing, and a feature amount calculation unit.
A first generation unit that generates the first image data in the first region based on the feature amount calculated by the feature amount calculation unit, and
When the designation of the second region located in the first region is accepted, the first feature amount is calculated based on the feature amount calculated by the feature amount calculation unit according to the feature amount indicating the degree of unevenness in the second region. It is provided with a second generation unit that generates the second image data in one area.
The first generation unit sets a color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the first region, and based on the set color, the first generation unit. Generate image data
The second generation unit sets a color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region, and based on the set color, the second generation unit. A processing path calculation device characterized by generating image data. An intersection position correction unit that corrects the position of the intersection calculated by the intersection calculation unit, and an intersection position correction unit.
Relates intersection corrected by intersection point position correcting unit, and a correction feature quantity calculator for calculating a correction feature amount indicating a degree of roughness in the first region of the workpiece surface after machining,
A third generation unit that generates the first correction image data in the first region based on the correction feature amount calculated by the correction feature amount calculation unit.
When receiving the designation of the second region located within the first region, according to the feature amount indicating the degree of irregularity in the second region, based on the correction characteristic amount calculated by the correction characteristic calculating section, A fourth generation unit for generating the second corrected image data in the first region is provided.
The third generation unit sets a color corresponding to each correction feature amount in the first region based on the maximum value and the minimum value of the feature amount in the first region, and based on the set color, the third generation unit. 1 Generate corrected image data and
The fourth generation unit sets a color corresponding to each correction feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region, and based on the set color, the fourth generation unit. 2. The processing path calculation device according to claim 1, wherein the corrected image data is generated. An image based on the first image data and an image based on the first corrected image data are displayed side by side on the display unit.
The processing path calculation device according to claim 2, wherein an image based on the second image data and an image based on the second corrected image data are displayed side by side on a display unit. In the machining path calculation method for calculating the machining path for machining a workpiece based on a plurality of command points that indicate the position of the spindle,
Set the evaluation cross section that intersects the processing path,
Calculate the intersection of the set evaluation cross section and the processing path,
With respect to the calculated intersection, the feature quantity indicating the degree of unevenness in the first region of the work surface after processing is calculated.
Based on the calculated feature amount, the first image data in the first region is generated, and the first image data is generated.
When the designation of the second region located in the first region is accepted, the second image in the first region is based on the calculated feature amount according to the feature amount indicating the degree of unevenness in the second region. Generate data,
A color corresponding to each feature amount in the first region is set based on the maximum value and the minimum value of the feature amount in the first region, and the first image data is generated based on the set color.
A color corresponding to each feature amount in the first region is set based on the maximum value and the minimum value of the feature amount in the second region, and the second image data is generated based on the set color. A characteristic processing path calculation method. In a computer program that can be executed by a machining path calculation device that calculates a machining path for machining a workpiece based on a plurality of command points that indicate the position of the spindle.
In the processing path calculation device,
Set the evaluation cross section that intersects the processing path,
Calculate the intersection of the set evaluation cross section and the processing path,
With respect to the calculated intersection, the feature quantity indicating the degree of unevenness in the first region of the work surface after processing is calculated.
Based on the calculated feature amount, the first image data in the first region is generated, and the first image data is generated.
When the designation of the second region located in the first region is accepted, the second image in the first region is based on the calculated feature amount according to the feature amount indicating the degree of unevenness in the second region. Generate data,
A color corresponding to each feature amount in the first region is set based on the maximum value and the minimum value of the feature amount in the first region, and the first image data is generated based on the set color.
A process of setting a color corresponding to each feature amount in the first region based on the maximum value and the minimum value of the feature amount in the second region and generating the second image data based on the set color. A computer program characterized by being executed.

Images