WO2024004046A1

WO2024004046A1 - Machining control device and program

Info

Publication number: WO2024004046A1
Application number: PCT/JP2022/025819
Authority: WO
Inventors: 東錫金
Original assignee: ファナック株式会社
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2024-01-04

Abstract

Provided is a machining control device and program whereby a cord can be machined by turning. The machining control device according to one embodiment comprises a machining control unit. The machining control unit forms a binary image composed of a first value and a second value into a workpiece by controlling a machine tool such that a tool is brought into contact with a region to be cut of the workpiece while the workpiece is being rotated, the region to be cut corresponding to the first value, and the tool is not brought into contact with a non-cutting region of the workpiece corresponding to the second value.

Description

Processing control device and program

The present invention relates to a processing control device and a program.

A method of milling a two-dimensional code onto a workpiece is known.

Patent No. 6650646

With conventional methods, codes such as two-dimensional codes or barcodes cannot be processed into workpieces by turning. When processing a cord into a workpiece using a conventional method using a turning machine, it is necessary to once stop the rotation of the workpiece before milling. Therefore, the processing time becomes long.

The problem to be solved by the embodiments of the present invention is to provide a processing control device and a program that can process a code by turning.

The processing control device of the embodiment includes a processing control section. The machining control unit brings a tool into contact with a cutting target area of the rotating workpiece corresponding to the first value, and converts the binary image consisting of a first value and a second value into the cutting target area of the rotating workpiece. The cutting area corresponding to the second value is formed on the workpiece by controlling the machine tool so that the tool does not come into contact with it.

According to the present invention, the cord can be processed by turning.

FIG. 1 is a block diagram illustrating an example of a control system according to an embodiment and a main configuration of components included in the control system. FIG. 2 is a perspective view showing an example of a workpiece on which a cord is formed. FIG. 2 is a plan view showing an example of a workpiece on which a cord is formed, viewed from the front. FIG. 4 is a cross-sectional view taken along line AA of the workpiece in FIG. 3. 2 is a flowchart showing an example of processing by the processor in FIG. 1. The figure for explaining the method of forming a cord into a cylinder by turning processing. The figure for explaining the method of forming a cord into a cylinder by turning processing.

A numerical control system according to an embodiment will be described below with reference to the drawings. Note that in each of the drawings used to describe the embodiments below, the scale of each part may be changed as appropriate. Further, each drawing used in the description of the embodiments below may omit the configuration for the sake of explanation. Also, the same reference numerals indicate similar elements in each drawing and this specification.
FIG. 1 is a block diagram showing an example of a main configuration of a control system 1 and components included in the control system 1 according to an embodiment. The control system 1 is a system that controls the industrial machine 200. The control system 1 processes a code such as a one-dimensional code or a two-dimensional code on the surface of a workpiece. One-dimensional codes are also called barcodes. The two-dimensional code is, for example, a QR code (registered trademark), DataMatrix, PDF417, or other two-dimensional code. The control system 1 includes, as an example, a control device 100 and an industrial machine 200.

The control device 100 is a device that controls industrial machinery 200 and the like. The control device 100 controls the industrial machine 200 using a method such as NC (numerical control), CNC (computerized numerical control), or PLC (programmable logic controller). The control device 100 controls the industrial machine 200 to process and form a code, such as a one-dimensional code or a two-dimensional code, on the surface of a workpiece by cutting. The material of the workpiece is a material that can be turned, such as metal or resin. The control device 100 includes, for example, a processor 110, a ROM (read-only memory) 120, a RAM (random-access memory) 130, an auxiliary storage device 140, a control interface 150, an input device 160, and a display device 170. A bus 180 or the like connects these parts.
Note that the control device 100 is an example of a processing control device.

The processor 110 is a central part of a computer that performs processing such as calculations and control necessary for the operation of the control device 100, and performs various calculations and processing. The processor 110 is, for example, a CPU (central processing unit), MPU (micro processing unit), SoC (system on a chip), DSP (digital signal processor), GPU (graphics processing unit), ASIC (application specific integrated circuit), These include a PLD (programmable logic device) or an FPGA (field-programmable gate array). Alternatively, processor 110 is a combination of more than one of these. Further, the processor 110 may be a combination of these and a hardware accelerator. The processor 110 controls each part to realize various functions of the control device 100 based on programs such as firmware, system software, and application software stored in the ROM 120 or the auxiliary storage device 140. Furthermore, the processor 110 executes processing to be described later based on the program. Note that part or all of the program may be incorporated into the circuit of the processor 110.

ROM 120 and RAM 130 are main storage devices of a computer with processor 110 at its core.
The ROM 120 is a nonvolatile memory used exclusively for reading data. The ROM 120 stores, for example, firmware among the above programs. The ROM 120 also stores data used by the processor 110 to perform various processes.
The RAM 130 is a memory used for reading and writing data. The RAM 130 is used as a work area for storing data temporarily used by the processor 110 to perform various processes. RAM 130 is typically volatile memory.

The auxiliary storage device 140 is an auxiliary storage device of a computer with the processor 110 at its core. The auxiliary storage device 140 is, for example, an EEPROM (electric erasable programmable read-only memory), an HDD (hard disk drive), or a flash memory. The auxiliary storage device 140 stores, for example, system software and application software among the above programs. Further, the auxiliary storage device 140 stores data used by the processor 110 to perform various types of processing, data generated by processing in the processor 110, various setting values, and the like.

The control interface 150 is an interface for the control device 100 to communicate with the industrial machine 200 and the like. Control device 100 controls industrial machine 200 and the like via control interface 150.

The input device 160 accepts operations by the operator of the control device 100. Input device 160 is, for example, a keyboard, keypad, touch pad, mouse, or controller. Moreover, the input device 160 may be a device for voice input.

The display device 170 displays a screen for notifying the operator of the control device 100 of various information. The display device 170 is, for example, a display such as a liquid crystal display or an organic EL (electro-luminescence) display. Further, a touch panel can also be used as the input device 160 and the display device 170. That is, the display panel included in the touch panel can be used as the display device 170, and the pointing device provided in the touch panel for touch input can be used as the input device 160.
Note that the display device 170 is an example of a display section.

The bus 180 includes a control bus, an address bus, a data bus, etc., and transmits signals sent and received by each part of the control device 100.

The industrial machine 200 is a machine that can turn the outer periphery of a workpiece. The industrial machine 200 is, for example, a lathe or a turning center. Industrial machine 200 includes, for example, a cutting tool 210.

The cutting tool 210 is a tool for cutting the workpiece 300. The industrial machine 200 brings the cutting tool 210 into contact with the rotating workpiece 300, and performs turning on the abutted portion.

FIG. 2 is a perspective view showing an example of a workpiece 300 on which a cord 400 is formed.
FIG. 3 is a plan view showing an example of the workpiece 300 on which the cord 400 is formed, viewed from the front.
FIG. 4 is a cross-sectional view taken along the line AA, showing an example of the workpiece 300 on which the cord 400 is formed. Note that FIG. 4 also shows a code 500. A code 500 indicates a code formed on the workpiece 300.

The control system 1 forms the cord 400 on the workpiece 300 by turning. At least a portion of the workpiece 300 is a cylinder 310. However, the workpiece 300 shown in FIGS. 2 to 4 and the like is entirely a cylinder 310. Note that at least a portion of the cylinder 310 may be hollow. The control system 1 forms a cord 400 on the side of the cylinder 310. The code 400 is a code that stores information, such as a two-dimensional code or a barcode. The information stored in the code can be read using a code reader or the like. Note that the code 400 may be inverted in brightness and darkness. Further, the code 400 may be reversed (left and right).

Furthermore, as shown in FIG. 3, the control system 1 forms the cord 400 so that a portion of the cord 400 is not stretched or compressed when the workpiece 300 is viewed from the front. For this purpose, the control system 1 cuts a portion where the dark portion of the code 500 is projected onto the surface of the cylinder 310, as shown in FIG. Note that the portion of the code 500 that is painted black is the dark portion. The white part is the bright part. Code 500 is a binary image consisting of dark and bright parts. Note that the front direction will be described later.

Note that the color of the dark part of the code 500 is an example of the first value. The color of the bright portion of code 500 is an example of the second value.

Hereinafter, the operation of the control system 1 according to the embodiment will be explained based on FIG. 5 and the like. Note that the contents of the processing in the following operation description are merely examples, and various processing that can obtain similar results can be used as appropriate. FIG. 5 is a flowchart illustrating an example of processing by the processor 110 of the control device 100. The processor 110 executes the process shown in FIG. 5 based on a program stored in, for example, the ROM 120 or the auxiliary storage device 140.

In step ST11 of FIG. 5, the processor 110 of the control device 100 acquires data to be encoded (hereinafter referred to as "original data"). The processor 110 acquires original data according to an operation input to the input device 160, for example. Processor 110 obtains original data according to information input from other devices, for example.

Then, the processor 110 generates the code 500 using the original data. The generated code 500 is a code that stores original data.

In step ST12, the processor 110 determines cutting parameters for forming the cord 400 on the cylinder 310 by cutting. Processor 110 determines cutting parameters according to operational input to input device 160, for example. Processor 110 determines cutting parameters according to information input from other devices, for example. The cutting parameters include various parameters such as code direction, code size, code position, cutting depth, and reference direction.

The cord direction is a parameter that determines whether the vertical direction of the cord 500 is aligned with the z-axis direction or the horizontal direction of the cord 500 is aligned with the z-axis direction.

The code size is a parameter that determines the size of the code 400 and code 500. The cord size determines the size of the cord 400 and the cord 500, for example, by the vertical length and the horizontal length of the cord 500. Alternatively, the cord size determines the size of the cord 400 and the cord 500 based on the length of the cord 500 in the z-axis direction and the length in the y-axis direction, for example. Note that the length of the cord 500 in the y-axis direction is within 2R. Here, R is the radius of the cylinder 310. Further, the length of the cord 500 in the z-axis direction is equal to or less than the height of the cylinder 310.

Note that the origin of the orthogonal coordinate system (x, y, z) used in the description of this embodiment is a point on a straight line that coincides with the central axis of the cylinder 310. In other words, the central axis of the cylinder 310 and the z-axis coincide.

The code position is a parameter that determines which part of the cylinder 310 the code 400 is cut into. The code position is determined by the yz coordinates of the code 500, for example. Note that the code 500 is assumed to be parallel to the yz coordinate plane.
For example, code position defines the position of code 400 by the coordinates of the center of code 500. Let the coordinates of the center of the code 500 be (y0, z0). If the length of the code 500 in the z-axis direction is 2Lz and the length of the code 500 in the y-axis direction is 2Ly, the coordinates of the four vertices of the code 500 are (y1, z1) = (y0-Ly, z0-Lz ), (y2, z1) = (y0 + Ly, z0 - Lz), (y2, z2) = (y0 + Ly, z0 + Lz), (y1, z2) = (y0 - Ly, z0 - Lz).

Note that the code position satisfies -R≦y1, y2≦R, Zb≦z1, and z2≦Zu. Here, Zb and Zu are the z coordinates of the bottom surface of the cylinder 310, respectively. However, Zb<Zu.

Furthermore, it is preferable that y0=0. This is because when y0=0, the cord 400 is formed so that the cord 400 is located at the center of the cylinder 310 when the cylinder 310 is viewed from the front. Note that the center in this case is the center in the front direction and the direction perpendicular to the z-axis.

The cutting depth is a parameter indicating how deep from the surface of the cylinder 310 the cutting is to be performed. The industrial machine 200 cuts the cord 400 on the cylinder 310 so that the depth from the surface of the cylinder 310 is the depth indicated by the cutting depth.

The reference direction is a parameter that determines the surface direction of the workpiece 310. The direction in which the front direction is viewed from the central axis of the cylinder of the workpiece 300 is the reference direction.

In step ST13, the processor 110 determines which part of the surface of the cylinder 310 is to be cut. To this end, the processor 110 projects the code 500 parallel to the yz coordinate plane onto the surface of the cylinder 310, defined by the code position. However, the rotational position of the cylinder 310 is assumed to be a position where the reference direction and the x direction coincide. Furthermore, it is assumed that the projection is performed on the surface of the cylinder 310 within a range of ±(2/π) [rad] from the reference direction. Processor 110 also projects code 500 in the x-axis direction. As a result, the coordinates (Y, Z) on the code 500 are projected onto the coordinates (R, Θ, Z) of the cylindrical coordinate system (r, θ, z). Note that the cylindrical coordinate system (r, θ, z) used in the description of this embodiment has the same origin as the orthogonal coordinate system (x, y, z). Further, the z-axis of the cylindrical coordinate system (r, θ, z) and the z-axis of the orthogonal coordinate system (x, y, z) are the same. Further, the reference direction is a direction in which θ=0. Therefore, when the reference direction and the x direction match, the point on the x axis is θ=0. When the reference direction and the x direction match, Θ is as follows.

The processor 110 determines that the area where the dark part of the code 500 is projected onto the surface of the cylinder 310 is to be cut out of the area where the code 500 is projected onto the surface of the cylinder 310 as described above. The area where the dark part of the code 500 is projected onto the surface of the cylinder 310 is an example of the cutting target area corresponding to the first value. Further, among the regions in which the code 500 is projected onto the surface of the cylinder 310 as described above, the region in which the bright portion of the code 500 is projected onto the surface of the cylinder 310 is an example of a non-cutting region corresponding to the second value.

In step ST14, the processor 110 controls the industrial machine 200 to turn the cord 400 into the cylinder 310 based on the cutting parameters determined in step ST12 and the area determined in step ST14. That is, the processor 110 controls the industrial machine 200 to cut the area determined in step ST13 on the surface of the cylinder 310 to the depth indicated by the cutting depth by turning. Based on the control, the industrial machine 200 forms the cord 400 on the cylinder 310 by turning.

6 and 7 are diagrams for explaining a method of forming the cord 400 into the cylinder 310 by turning.
A method of forming the cord 400 into the cylinder 310 by turning will be described with reference to FIGS. 6 and 7. Note that here, it is assumed that the rotation direction of the cylinder 310 is the D direction (clockwise) shown in FIGS. 6 and 7. Also, consider turning a portion of the first line of the code 500 whose y coordinate is from Y1 to Y2 into a cylinder 310. Note that the first line of the code 500 is the bottom line of the code 500 shown in FIGS. 6 and 7.

The coordinates (Y1, Z1) on the code 500 are projected onto the coordinates (R, Θ1, Z1) of the cylindrical coordinate system (r, θ, z) by the process of step ST13. Note that Z1 is the z coordinate of the first line of the code 500. Θ1 is as follows.

Further, the coordinates (Y2, Z1) on the code 500 are projected onto the coordinates (R, Θ2, Z1) of the cylindrical coordinate system (r, θ, z) by the process of step ST13. Θ2 is as follows.

Further, θw shown in FIGS. 6 and 7 indicates the θ coordinate of the contact position of the cutting tool 210. That is, θw indicates the angle of the contact position of the cutting tool 210 from the reference direction.

The processor 110 brings the cutting tool 210 into contact with the cylinder 310 at a position where θw=Θ1 and z=Z1 as shown in FIG.

Then, the processor 110 keeps the cutting tool 210 in contact with the cutting tool 210 until the position where θw=Θ2 and z=Z1 as shown in FIG. Then, the processor 110 moves the cutting tool 210 away from the cylinder 310 at a position where θw=Θ2. As a result, the range of θ=Θ1 to θ=Θ2 of the cylinder 310 is cut.

In this way, in the first line of the code 500, the portion whose y coordinate is from Y1 to Y2 is formed into the cylinder 310 by turning.

The processor 110 similarly performs turning on the parts other than Y1 to Y2 on the first line of the code 500. Note that the processor 110 may turn one line of the code 500 into the cylinder 310 while rotating the cylinder 310 once, or may turn one line of the code 500 into the cylinder while rotating the cylinder 310 multiple times. 310 may be turned. Furthermore, the processor 110 may perform the turning process on one line of the code 500 in one time, or may perform the turning process in multiple times.

When the turning process for one line is completed, the processor 110 moves at least either the workpiece 300 or the cutting tool 210 in the z-axis direction to perform the turning process on the next line. Processor 110 repeats this to turn all rows of code 500 into cylinder 310 to form code 400 on cylinder 310.
After the process of step ST14, the processor 110 ends the process shown in FIG.

As described above, by performing the processing in step ST14, the processor 110 converts the binary image consisting of the first value and the second value into the cutting target area corresponding to the first value of the rotating workpiece. It functions as an example of a processing control unit formed on the workpiece by controlling the machine tool so that the tool does not come into contact with the tool in the non-cutting area corresponding to the second value of the workpiece.

According to the control system 1 of the embodiment, the control device 100 brings the processing tool into contact with the region to be cut of the rotating workpiece 300. Then, the control device 100 moves the processing tool away from the workpiece 300 outside the cutting target area. Thereby, the control system 1 of the embodiment can form the cord by turning.

According to the control system 1 of the embodiment, the control device 100 sets the region where the dark portion of the code 500 is projected onto the workpiece 300 as the region to be cut. The cord 400 formed using such a cutting target area is formed on the curved surface of the side surface of the cylinder 310, but as shown in FIG. I haven't done that. Therefore, the reading accuracy and visibility of the code 400 are improved.

According to the control system 1 of the embodiment, the control device 100 forms the code 400 on the workpiece 300. The code 400 is an image in which a plurality of cells (modules) are arranged in a matrix or in a line. Therefore, this image is suitable for the turning process of this embodiment.

The above embodiment can also be modified as follows.
In the above embodiment, the processor 110 of the control device 100 generated the code in step ST11. However, a device other than the control device 100 may generate the code. In this case, the processor 110 obtains the code from the device or the like.

In the above embodiment, the control system 1 cut the cord into the cylinder 310. However, the control system 1 may cut a binary image other than the code into the cylinder 310 instead of the code.

Instead of the cylinder 310, the workpiece 310 may include a column with a fan-shaped bottom, such as a semicircle. In this case, the control system 1 lathes the cord on the side surface of the column.

In the embodiments described above, the cord is rectangular. However, the cord may have a shape other than a rectangle.

The processor 110 may implement part or all of the processing implemented by the program in the above embodiments using a circuit hardware configuration.

The program that implements the processing of the embodiment is transferred, for example, while being stored in the device. However, the device may be transferred without the program stored therein. Then, the program may be separately transferred and written into the device. Transfer of the program at this time can be realized, for example, by recording it on a removable storage medium or by downloading it via a network such as the Internet or a LAN (local area network).

Although the embodiments of the present invention have been described above, they are shown as examples and do not limit the scope of the present invention. Embodiments of the present invention can be implemented in various ways without departing from the gist of the present invention.

1 Control System 100 Control Device 110 Processor 120 ROM
130 RAM
140 Auxiliary storage device 150 Control interface 160 Input device 170 Display device 180 Bus 200 Industrial machine 210 Cutting tool 300 Workpiece 310 Cylinder 400,500 Code

Claims

A binary image consisting of a first value and a second value is made to correspond to the second value of the rotating workpiece by bringing a tool into contact with a cutting target area corresponding to the first value of the rotating workpiece. A machining control device comprising a machining control unit that controls a machine tool so that a tool does not come into contact with the workpiece in an area outside of cutting.
The cutting target area is an area in which the first value of the binary image is projected onto the surface of the workpiece,
The processing control device according to claim 1, wherein the non-cutting area is an area in which the second value of the binary image is projected onto the surface of the workpiece.
The processing control device according to claim 1 or 2, wherein the binary image is a two-dimensional code or a barcode.
The processor included in the processing control device,
A binary image consisting of a first value and a second value is made to correspond to the second value of the rotating workpiece by bringing a tool into contact with a cutting target area corresponding to the first value of the rotating workpiece. A program that functions as a machining control unit to form on the workpiece by controlling the machine tool so that the tool does not come into contact with the outside of the cutting area.