JP7229621B1 - System and program - Google Patents

Abstract

It is an object of the present invention to provide a system and a program for maintaining the machining accuracy of a workpiece even when an abrasive material wears out.
A system comprising at least one computer device, comprising storage means for storing information on the wear rate of the abrasive material of the polishing tool under said conditions in association with information on conditions under which the polishing tool polishes the workpiece; A system comprising: input means for accepting input of conditions for polishing the abrasive; and specifying means for specifying information on the wear rate of the abrasive material corresponding to the accepted conditions.

Description

TECHNICAL FIELD The present invention relates to a system and a program for maintaining the machining accuracy of a workpiece even when an abrasive material wears.

2. Description of the Related Art When a machine tool is used to cut, drill, or otherwise process a workpiece, metal fluff called "burrs" may occur on the processed surface of the workpiece. It is known to perform a process of removing burrs (hereinafter referred to as deburring) or a process of shaving corners where burrs are generated (hereinafter referred to as chamfering).

These processes are performed manually or using machine tools for numerically controlled (NC) machining. In machining using machine tools, NC programs (also called NC data) are used, and workers directly input data to the machine tool, or work designed by CAD (Computer Aided Design) software. Using shape data, CAM (Computer Aided Manufacturing) software is used to identify the path of a tool attached to a machine tool (for example, Patent Document 1).

By the way, when processing such as deburring and chamfering is performed using a machine tool, the abrasive material of the polishing tool attached to the machine tool gradually wears out. As the wear of the abrasive progresses, the cutting depth of the polishing tool into the work decreases, making it difficult to maintain the machining accuracy of the work.

JP 2016-150428 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a system and a program for maintaining the machining accuracy of a workpiece even when the abrasive material wears.

An object of the present invention is to
[1] A system comprising at least one computer device, storage means for storing information on the wear rate of the abrasive material of the polishing tool under the conditions in association with information on the conditions for polishing a workpiece with the polishing tool. , an input means for accepting input of conditions for polishing a workpiece, and a specifying means for specifying information on the wear rate of the abrasive material corresponding to the accepted conditions;
[2] A system comprising at least one computer device, wherein input means receives input of conditions for polishing a workpiece with a polishing tool; and a specifying means for specifying information on the wear rate of the abrasive material under accepted conditions using a predictive model machine-learned with information on the wear rate of the abrasive material of the polishing tool as output data;
[3] Based on the information about the specified wear rate, the contact of the polishing tool with the workpiece is such that the load applied to the polishing tool and/or the amount of change in the load when polishing under the above conditions is within a predetermined range. The system according to [1] or [2] above, comprising generating means for generating control information for controlling the position of the direction or the amount of protrusion or depth of cut in the contact direction of the abrasive material;
[4] The system according to [3] above, comprising control means for controlling the position of the polishing tool in the contact direction or the amount of protrusion or depth of cut of the abrasive material in the contact direction based on the generated control information;
[5] The system according to [3] or [4] above, comprising transmission means for transmitting the generated control information to another computer device different from the one computer device;
[6] Based on the information on the specified wear rate, the position of the contact direction of the polishing tool with the work or the contact direction of the abrasive material is adjusted so that the depth of cut of the polishing tool into the work is within a predetermined range. The system according to the above [1] or [2], comprising generating means for generating control information for controlling the amount of protrusion or the amount of cut;
[7] The system according to [6] above, comprising control means for controlling the position of the polishing tool in the contact direction or the amount of protrusion or depth of cut in the contact direction of the abrasive material, based on the generated control information;
[8] The system according to [6] or [7] above, comprising transmission means for transmitting the generated control information to another computer device different from the one computer device;
[9] Receiving means for receiving information on the conditions under which the work was polished by the polishing tool in a device other than the computer device of the above 1, and information on the wear rate of the abrasive material of the polishing tool under the conditions; The system according to any one of [1] and [3] to [8] above, wherein the storage means stores received information about the wear rate of the abrasive material in association with the received information about the conditions;
[10] Information receiving means for receiving information on conditions under which a workpiece is polished by a polishing tool in a device other than the computer device of the above 1, and information on the wear rate of the abrasive material of the polishing tool under the conditions; , wherein the prediction model performs machine learning with information on the received conditions as input data and information on the wear rate of the abrasive material received as output data. system of;
[11] A system comprising at least one computer device, in which the load and/or the amount of change in the load applied to the polishing tool is associated with information on the conditions under which the workpiece is polished by the polishing tool when polishing is performed under the conditions. a storage means for storing control information for controlling the position of the polishing tool in the contact direction with the workpiece or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool, in order to set the range of A system comprising: input means for accepting input of conditions for polishing a workpiece; and specifying means for specifying control information corresponding to the accepted conditions;
[12] A system comprising at least one computer device, in which the depth of cut of the polishing tool into the workpiece is set within a predetermined range in association with information on the conditions under which the polishing tool polishes the workpiece. Storage means for storing control information for controlling the position of the polishing tool in the contact direction with the work or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool, and the conditions for polishing the work A system comprising input means for accepting input of and specifying means for specifying control information corresponding to the accepted conditions;
[13] A system comprising at least one computer device, wherein input means receives input of conditions for polishing a workpiece with a polishing tool; The position of the polishing tool in the direction of contact with the workpiece, or the amount of protrusion or cut of the abrasive material of the polishing tool in the contact direction, in order to keep the load and/or the amount of change in the load applied to the polishing tool during polishing within a predetermined range. and specifying means for specifying control information under received conditions using a prediction model machine-learned with control information for controlling the loading as output data;
[14] A system comprising at least one computer device, wherein input means receives input of conditions for polishing a workpiece with a polishing tool; To control the position of the polishing tool in the direction of contact with the workpiece, or the amount of protrusion or depth of cut in the direction of contact of the abrasive material of the polishing tool, in order to make the depth of cut of the polishing tool into a predetermined range. A system comprising a specifying means for specifying control information under received conditions using a prediction model machine-learned with control information as output data;
[15] Control means for controlling the position of the polishing tool in the contact direction with the workpiece, or the amount of protrusion or depth of cut in the contact direction of the abrasive material, based on the specified control information. The system according to any one of [14];
[16] The system according to any one of [11] to [15] above, comprising transmission means for transmitting the specified control information to another computer device different from the one computer device;
[17] Information on the conditions under which the workpiece was polished with the polishing tool in another device different from the computer device of 1 above, and the load and/or the amount of change in the load applied to the polishing tool when polishing under the said conditions. information receiving means for receiving information on the position of the polishing tool in the contact direction with the workpiece or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool for setting the predetermined range, wherein the storage means comprises: [11], [15] and the above [11], [15], and The system according to any one of [16];
[18] information on the conditions under which the workpiece was polished by the polishing tool in another device different from the computer device of the above 1, and the load and/or change in the load applied to the polishing tool when polishing under the conditions; an information receiving means for receiving information about the position of the polishing tool in the contact direction with the workpiece or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool, wherein the prediction model is: Machine learning is performed by using information on the received conditions as input data and information on the received position of the polishing tool in the contact direction or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool as output data. The system according to any one of [12], [15] and [16];
[19] Information on the conditions under which the workpiece is polished by the polishing tool in a device other than the computer device of 1 above, and information for setting the depth of cut of the polishing tool into the work under the above conditions to a predetermined range. Information receiving means for receiving information about the position of the polishing tool in the contact direction with the workpiece or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool, and the storage means associates the information about the received conditions with the information. any one of the above [13], [15] and [16], wherein information on the received position of the polishing tool in the contact direction or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool is stored. the system described;
[20] Information on the conditions under which the workpiece is polished by the polishing tool in a device other than the computer device of the above 1, and information for setting the depth of cut of the polishing tool into the work in a predetermined range under the above conditions. Information receiving means for receiving information on the position of the polishing tool in the contact direction with the workpiece or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool, and the prediction model inputs information on the received conditions. Machine-learned information on the position of the received polishing tool in the contact direction or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool is used as output data. [14] to [16] A system according to any of the preceding;
[21] Information on conditions is information on the type of abrasive material, the type of work, the rotational speed of the polishing tool, the feed speed of the polishing tool, the state of the work before polishing, and/or the state of the work after polishing. , the system according to any one of the above [1] to [20];
[22] A program to be executed in a computer device, which associates the computer device with information on conditions for polishing a workpiece with a polishing tool, and stores information on the wear rate of the abrasive material of the polishing tool under said conditions. a program that functions as storage means for storing information, input means for accepting input of conditions for polishing a workpiece, and specifying means for specifying information on the wear rate of the abrasive material corresponding to the accepted conditions;
[23] A program to be executed in a computer device, the computer device having an input means for receiving input of conditions for polishing a work with a polishing tool and information on conditions for polishing the work as input data, A program that uses a predictive model machine-learned with information about the wear rate of the abrasive material of the polishing tool under the conditions as output data to function as a specifying means for specifying information about the wear rate of the abrasive material under the received conditions;
[24] A program to be executed in a computer device, wherein the computer device is associated with information on conditions under which a workpiece is polished by a polishing tool, and a load and/or a load applied to the polishing tool when polishing is performed under the said conditions. A memory that stores control information for controlling the position of the polishing tool in the contact direction with the workpiece or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool in order to keep the amount of change in the predetermined range A program functioning as a means, an input means for receiving an input of conditions for polishing a workpiece, and a specifying means for specifying control information corresponding to the received conditions;
[25] A program to be executed on a computer device, wherein the computer device is associated with information on conditions for polishing a work piece with a polishing tool, and the cutting depth of the polishing tool into the work piece is set within a predetermined range under the conditions. storage means for storing control information for controlling the position of the polishing tool in the contact direction with the workpiece or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool for polishing the workpiece; A program that functions as an input means for accepting an input of an actual condition and a specifying means for specifying control information corresponding to the accepted condition;
[26] A program to be executed in a computer device, the computer device having an input means for receiving input of conditions for polishing a work with a polishing tool and information on conditions for polishing the work as input data, The position of the contact direction of the polishing tool with respect to the workpiece or the protrusion of the contact direction of the abrasive material of the polishing tool to keep the load and/or the amount of change in the load applied to the polishing tool within a predetermined range when polishing under the above conditions. A program that uses a predictive model machine-learned with control information for controlling the amount or depth of cut as output data to function as a specifying means for specifying control information under received conditions;
[27] A program executed in a computer device, the computer device having input means for receiving input of conditions for polishing a work with a polishing tool and information on conditions for polishing the work as input data, Control the position of the polishing tool in the direction of contact with the workpiece or the amount of projection or depth of cut in the contact direction of the abrasive material of the polishing tool so that the depth of cut of the polishing tool into the workpiece is within a predetermined range under the above conditions. A program that uses a machine-learned predictive model with control information for doing as output data and functions as a specifying means for specifying control information under received conditions;
can be achieved by

ADVANTAGE OF THE INVENTION According to this invention, the system and program for enabling it to maintain the processing precision of a workpiece|work even if an abrasive material wears out can be provided.

It is a figure explaining an example of processing of a work by a grinding tool concerning an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram showing the structure of the polishing tool concerning embodiment of this invention concerning embodiment of this invention. 4 is a flowchart of control information generation processing according to the embodiment of the present invention. It is a figure which shows an example of a display screen concerning embodiment of this invention. It is a figure showing the material master table concerning embodiment of this invention. FIG. 4 is a diagram showing a state of burrs formed on a workpiece before processing according to the embodiment of the present invention; FIG. 4 is a diagram showing the workpiece after processing according to the embodiment of the present invention; FIG. 4 is a diagram representing an edge quality master table according to an embodiment of the invention; It is a figure which shows the example of the grinding-tool master table concerning embodiment of this invention. It is a figure showing the wear rate master table concerning an embodiment of the present invention. It is a figure which shows an example of the load and the change amount of load concerning embodiment of this invention. 4 is a flowchart of control information specifying processing according to the embodiment of the present invention. It is a figure showing the control-information master table concerning embodiment of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated in detail hereafter. It should be noted that the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications as long as they do not contradict the gist of the present invention. In addition, each process constituting the flowchart described below is in random order as long as there is no contradiction or inconsistency in the contents of the process. Further, part of the processing may be omitted or other processing may be added as long as there is no contradiction or inconsistency in the processing content.

(system)
The system of the present invention comprises at least one computing device. The computer device provided in the system of the present invention may be a single computer device or a plurality of computer devices. A computer device provided in the system of the present invention may be a computer device provided in a machine tool. A computer device provided in the machine tool can control the machine tool to process a workpiece (workpiece).

Further, the computer device provided in the system of the present invention (hereinafter also referred to as the computer device of the present invention) is not a computer device provided in the machine tool, but a computer capable of communication connection with the computer device provided in the machine tool. It may be a device.

A computer device of the present invention includes at least a control section, a RAM, and a storage section, which are connected by an internal bus. The control unit is composed of a CPU (Central Processing Unit) and a ROM (Read Only Memory), executes a program stored in the storage unit, and controls the computer device. The controller has an internal timer that keeps time. A RAM (Random Access Memory) is a work area for the control unit. The storage unit is a storage area for saving programs and data. The control unit reads out the program and data from the RAM and performs program execution processing.

A computer device of the present invention may include a display and/or an input unit. The display unit displays various information such as the result of calculation in the control unit. The display unit may be a touch panel having a touch sensor. This touch panel functions as an input unit. The user can operate the input unit to input information and input operation instructions.

A computer device of the present invention may comprise a communication interface. The communication interface can be connected to a communication network wirelessly or by wire, and can transmit and receive data to and from other computer devices via the communication network. Data received via the communication interface is loaded into the RAM and processed by the controller.

When the computer device of the present invention is a computer device installed in a machine tool, the display section displays information such as a menu for the user to operate the machine tool. By selecting these displayed menus, the user can execute machining of the workpiece by the machine tool. In addition, in the computer device provided in the machine tool, the control information is specified, and according to the specified control information, the contact direction of the machine tool (the abrasive material of the polishing tool can be brought into contact with the work and pushed into the work direction) can be controlled.

Also, the computer device of the present invention may be provided in a polishing tool holder, which will be described later. In this case, a microcomputer can be used as the computer device of the present invention. In the computer device provided in the polishing tool holder, the control information is specified, and the contact direction of the abrasive material (the direction in which the abrasive material of the polishing tool can be brought into contact with the work and pushed into the work) is determined according to the specified control information. ) can be controlled by the amount of projection or depth of cut.

(polishing tool)
FIG. 1 is a diagram illustrating an example of processing of a work by a polishing tool according to an embodiment of the present invention. As shown in FIG. 1, the polishing tool 1 includes a polishing tool holder 2 and an abrasive material 6 detachably held by the polishing tool holder 2 . Abrasive tool holder 2 comprises a large diameter portion 3 , a sleeve 4 and a shank 5 . The abrasive tool holder 2 holds the abrasive material 6 so that the end of the abrasive material 6 protrudes from the sleeve 4 . When polishing is performed by rotating the polishing tool 1 and pushing the workpiece 7 in the direction of the rotation axis (that is, the direction parallel to the axial direction of the shank 5), the direction of the rotation axis is the contact direction. However, hereinafter, the rotation axis direction is defined as the Z-axis direction (rotation axis direction).

The abrasive material 6 is used for polishing the surface 8 to be processed of the workpiece 7. For example, a brush-like abrasive material is formed by bundling a plurality of linear abrasive materials as shown in FIG. material, elastic whetstone, etc. are used. The material of the workpiece 7 may be either metal or resin. The abrasive material 6 can be appropriately selected according to the material of the work 7 .

When the workpiece 7 is processed by cutting, grinding, drilling, or the like using a machine tool, metal fluff called "burrs" may be generated on the processed surface of the workpiece 7 . The polishing tool 1 is connected to the machine tool, and while the polishing material 6 is in contact with the workpiece 7, the polishing tool 1 is rotated clockwise or counterclockwise around the shank 5 as an axis (rotational axis), whereby the surface to be processed is 8 is polished, and burrs generated on the surface 8 to be processed can be removed. In this case, when the surface 8 to be processed is flat, it is preferable to bring the abrasive material 6 into contact with the work 7 so that the rotation axis R is perpendicular to the surface 8 to be processed. When the surface to be processed 8 is curved, the abrasive material 6 is brought into contact with the work 7 so that the rotation axis R is parallel to the normal line of the surface to be processed 8 at the contact point between the abrasive material 6 and the work. is preferred.

(polishing)
By the way, the polishing tool 1 is used with the shank 5 of the polishing tool 1 connected to the spindle of the machine tool. With the shank 5 of the polishing tool 1 connected to the spindle, the polishing tool 1 can be moved along the machining path by moving the spindle along a path set in advance by a program. As a result, the polishing tool 1 can polish the surface 8 of the work 7 to be processed. The control of the machining path of the polishing tool 1 by the machine tool can be performed not only on the XY plane perpendicular to the Z-axis direction, but also on the position in the Z-axis direction.

In the polishing process, the amount by which the tip of the polishing tool 1 (in the case of the polishing tool 1 having the polishing material 6, the tip of the polishing material 6) is pushed into the surface 8 to be processed of the workpiece 7 in one process (hereinafter referred to as depth of cut) can be set to a predetermined value. For example, when using a polishing tool 1 having an abrasive material 6 with a protruding amount of 5 mm, if the depth of cut is 2 mm, the distance between the work surface 8 of the workpiece 7 and the tip of the sleeve 4 of the polishing tool holder 2 is 3 mm. . When the cutting depth is 0 mm, for example, when using the polishing tool 1 having the abrasive material 6 with a protrusion amount of 5 mm, the distance between the surface 8 to be processed of the workpiece 7 and the tip of the sleeve 4 of the polishing tool holder 2 is 5 mm. (That is, the tip of the abrasive material 6 is in contact with the surface 8 to be processed of the work 7).

When the polishing process is performed, the abrasive material 6 is worn and the protrusion amount of the abrasive material 6 is shortened. When the position of the polishing tool 1 in the Z-axis direction remains the same, the depth of cut becomes smaller when the amount of protrusion of the abrasive material 6 becomes shorter due to the polishing process. When the abrasion of the abrasive material 6 progresses and the depth of cut becomes zero, polishing cannot be performed. Therefore, it is necessary to maintain the depth of cut within a predetermined range (or a predetermined value) in accordance with the state of wear of the abrasive material 6 due to polishing.

As a method of adjusting the depth of cut within a predetermined range or a method of maintaining the depth of cut at a predetermined value, a method of changing the position of the polishing tool 1 in the Z-axis direction, or a method of changing the position of the abrasive material 6 A method of changing the amount of protrusion can be mentioned.

More specifically, as a method for adjusting the depth of cut within a predetermined range, when the depth of cut reaches a predetermined value by polishing, the position of the polishing tool 1 in the Z-axis direction is adjusted by a predetermined distance. A method of moving to the work 7 side can be mentioned. In addition, as a method for adjusting the depth of cut within a predetermined range, a polishing tool holder 2 having a function of adjusting the amount of projection of the abrasive material 6 when the depth of cut reaches a predetermined value by polishing is used. Then, a method of projecting the abrasive material 6 from the sleeve 4 by a predetermined amount can be mentioned.

As a method for maintaining the depth of cut at a predetermined value, there is a method in which the position of the polishing tool 1 in the Z-axis direction is continuously moved toward the work 7 in accordance with the speed at which the abrasive material 6 wears and becomes shorter. As a method for maintaining the depth of cut at a predetermined value, an abrasive tool holder 2 having a function of adjusting the amount of protrusion of the abrasive material 6 is used, and the abrasive material 6 is moved according to the speed at which the abrasive material 6 wears and becomes shorter. A method of continuously protruding from the sleeve 4 can be mentioned.

The load applied to the polishing tool 1 changes according to the depth of cut. In general, when the depth of cut is large, the load applied to the polishing tool 1 becomes large. Further, when the depth of cut is small, the load applied to the polishing tool 1 is small. Therefore, by maintaining the depth of cut of the polishing tool 1 within a predetermined range (or a predetermined value), the load applied to the polishing tool 1 and/or the amount of change in the load can be kept within a predetermined range (or a predetermined value). can be maintained. In addition, when the abrasive material 6 of the polishing tool 1 is worn and its length is shortened, if polishing is performed with the same depth of cut as when the abrasive material is long, the abrasive material 6 will be removed from the sleeve 4. The load applied to the polishing tool 1 may increase regardless of the amount of protrusion. As described above, when the abrasive material 6 of the abrasive tool 1 wears and the load applied to the abrasive tool 1 increases regardless of the amount of protrusion of the abrasive material 6 from the sleeve 4, the measured value of the abrasive tool 1 increases. A value corrected based on the load can be used as the load of the polishing tool 1 . Different calculation formulas for correcting the load are used depending on the diameter of the grinding material 6 and the type of wire. The amount of change in load means, for example, the amount of change in load per unit time.

A known method is used for measuring the load applied to the polishing tool 1 and the amount of change in the load, and there is no particular limitation. As a method for measuring the load applied to the polishing tool 1 and the amount of change in the load, for example, the method described below is used.

FIG. 2 is a schematic diagram showing the structure of the polishing tool according to the embodiment of the present invention. FIG. 2 shows a cross-sectional view in a plane containing the rotation axis R of the polishing tool 1. As shown in FIG. 2(a) and 2(b), the abrasive material 6 is provided inside the large diameter portion 3 and the sleeve 4 of the abrasive tool holder 2. As shown in FIG. The abrasive material 6 is held by an abrasive material holder 6 a at the end opposite to the side protruding from the sleeve 4 . The abrasive material holder 6a has a through hole 6b, and a feed shaft 3a connected to the large diameter portion 3 passes through the through hole 6b. The feed shaft 3a is coaxial with the shank 5 (rotating shaft R). The abrasive material holder 6a is detachably held inside the large diameter portion 3 of the abrasive tool holder 2 via a mounting portion.

The polishing tool 1 has a load detector D inside the large diameter portion 3 . The load detector D can be, for example, a pressure sensor, a vibration detector, or a sound wave detector that detects the amplitude of sound generated in the polishing tool. When the load detector D is a pressure sensor, the load detector D contacts the feed shaft 3a from the rear Z1 and detects the pressure applied to the feed shaft 3a in the Z-axis direction.

The polishing tool holder 2 used for detecting the load comprises a control system comprising at least a control section having a CPU, a storage section connected to the control section, and a timer. A load detector D is connected to the input side of the controller. A motor is connected to the output side of the controller. The polishing tool holder 2 also includes a motor battery that supplies power to the motor, and a control battery that supplies power to the controller and the timer. The motor battery and the control battery can be charged by connecting a cable from the outside.

During the polishing process using the polishing tool 1, the control unit detects the output (load) from the load detector D and sequentially calculates a predetermined amount of load change per unit time. More specifically, the control unit obtains the load output from the load detector D at a constant cycle, and obtains the amount of load change per unit time from the three loads obtained in order along the time series. do. Here, the load can be obtained at intervals of 0.001 second to 1 second. The unit time for calculating the load change amount is three times the time for acquiring the load. The calculation of the amount of change in load is performed at the same interval as the interval at which the load is acquired.

(Controlling the position of the polishing tool in the Z-axis direction)
Abrasive tool 1 is attached to the spindle of a machine tool. By rotating the spindle and rotating the polishing tool 1, the workpiece 7 can be polished. A control section of the machine tool controls the movement of the spindle according to the control information of the machining path of the polishing tool 1 . By moving the spindle, the polishing tool 1 can be moved along the machining path. The processing path of the polishing tool 1 can be controlled not only on the XY plane, but also on the Z-axis direction.

(Control of protrusion amount of abrasive)
2(a) and 2(b), the abrasive material 6 is provided inside the large diameter portion 3 and the sleeve 4 of the abrasive tool holder 2. As shown in FIG. The abrasive material 6 is held by an abrasive material holder 6 a at the end opposite to the side protruding from the sleeve 4 . The abrasive material holder 6a has a through hole 6b, and a feed shaft 3a connected to the large diameter portion 3 passes through the through hole 6b. The feed shaft 3a is coaxial with the shank 5 (rotating shaft R).

2(a) shows the total length of the abrasive material 6 provided inside the sleeve 4 of the polishing tool is La, and FIG. 2(b) shows the length of the abrasive material 6 provided inside the sleeve 4 of the polishing tool. A case of Lb having a shorter total length than La is shown. A case will be described in which when the total length of the abrasive material 6 is Lb, the total length of the abrasive material 6 is changed so as to have the same amount of protrusion as in the case of La.

The amount of protrusion of the abrasive material 6 is determined on the side of the large diameter portion 3 (both upward and Z1 directions in FIG. ), or to the opening side of the sleeve 4, that is, to the tip side of the abrasive material 6 (also referred to as the downward direction or Z2 direction in FIG. 2) (see FIG. 2). The structure is not particularly limited as long as the grinding material holder 6a can be moved along the feed shaft 3a. For example, the feed shaft 3a and the through hole 6b of the grinding material holder 6a are threaded, It is possible to employ a mechanism that allows the grinding material holder 6a to move along the feed shaft 3a by turning a screw.

The amount of protrusion can also be changed manually. In the case of manual operation, for example, a mechanism may be employed in which a dial is provided on the large-diameter portion 3, and when the dial is turned, a screw is turned to move the abrasive material holder 6a along the feed shaft 3a. Further, when the amount of protrusion is automatically changed, the abrasive tool holder 2 may be provided with a microcomputer including at least a control section and a communication section, and the large diameter section 3 may be provided with a battery and a motor. In this case, the amount of protrusion can be changed by a mechanism in which a dial is rotated by driving a motor with a battery to move the abrasive material holder 6a along the feed shaft 3a based on instructions from the control section of the microcomputer. .

By the way, in FIG. 2(a), the abrasive material holder 6a is at the highest position, and if the abrasive material 6 has the same length, the protrusion amount is the smallest. On the other hand, in FIG. 2(b), the abrasive material holder 6a has moved downward. The amount of protrusion of the abrasive material 6 also varies depending on the length of the abrasive material 6 that has worn away. Therefore, when the polishing holder 6a as shown in FIG. 2B is moved downward from the uppermost position in FIG. Control is performed by controlling the amount of movement of the polishing holder 6a, that is, the value of (Lb-La) (that is, the amount of movement of the polishing holder 6a).

The system according to the first embodiment and the second embodiment, which will be described later, adjusts the abrasive material 6 of the polishing tool 1 according to the conditions for polishing the workpiece (hereinafter sometimes referred to as processing conditions). It is possible to specify the wear rate of In the case of a system that identifies the wear rate of the abrasive material 6 of the polishing tool 1 according to such processing conditions, the Z-axis position of the polishing tool 1 or the Z direction of the abrasive material 6 is determined based on the specified wear rate. By controlling the amount of protrusion in the axial direction, the depth of cut of the polishing tool 1 into the workpiece is maintained within a predetermined range (or a predetermined value), or the load applied to the polishing tool 1 or the load per unit time can be maintained within a predetermined range (or a predetermined value).

In a system that can specify the wear rate of the abrasive material 6 of the abrasive tool 1 according to the processing conditions, the machine tool to which the abrasive tool 1 is attached functions as a computer device that specifies the wear rate of the abrasive material 6 of the abrasive tool 1. may In this case, the machine tool specifies the wear rate of the abrasive material 6 of the polishing tool 1, and based on the specified wear rate, the machine tool sets the depth of cut of the polishing tool 1 into the workpiece 7 to a predetermined value. The load applied to the polishing tool 1 or the amount of change in the load per unit time is within a predetermined range (or a predetermined value). The position in the Z-axis direction can be controlled.

In a system that can specify the wear rate of the abrasive material 6 of the polishing tool 1 according to the processing conditions, a computer device different from the machine tool functions as a computer device that specifies the wear rate of the abrasive material 6 of the polishing tool 1. You may In this case, the computer device specifies information about the wear rate of the abrasive material 6 of the polishing tool 1, and controls the position of the polishing tool 1 in the Z-axis direction based on the specified information about the wear rate. Information or control information for controlling the amount of protrusion or depth of cut of the abrasive material 6 in the Z-axis direction can be generated, and the generated control information can be transmitted to the machine tool or the abrasive tool holder 2 . The machine tool controls the position of the polishing tool 1 in the Z-axis direction according to the received control information. Further, in the polishing tool holder 2, the protruding amount or cutting amount of the abrasive material 6 in the Z-axis direction is controlled according to the received control information.

In this case, the machining conditions are input by a machine tool or a device different from the machine tool, the input machining conditions are transmitted to the computer device, and the computer device calculates the wear rate based on the received machining conditions. and may generate control information.

This computer device is capable of communication connection with a plurality of machine tools, receives machining conditions from the plurality of machine tools, and transmits control information generated based on the received machining conditions to the corresponding machine tools. can do.

In a system that can specify the wear rate of the abrasive material 6 of the polishing tool 1 according to the processing conditions, a computer device different from the machine tool functions as a device that specifies the wear rate of the abrasive material 6 of the polishing tool 1. In this case, information on the wear rate of the abrasive material 6 of the identified abrasive tool 1 may be transmitted to the machine tool. In this case, the machine tool receives control information for controlling the position of the polishing tool 1 in the Z-axis direction, or the amount of protrusion or depth of cut of the grinding material 6 in the Z-axis direction, based on the received information about the wear rate. Control information for controlling the amount is generated, and according to the generated control information, the position of the polishing tool 1 in the Z-axis direction, or the amount of protrusion or depth of cut of the grinding material 6 in the Z-axis direction can be controlled. can.

In this case, the machining conditions are input by a machine tool or a device different from the machine tool, the input machining conditions are transmitted to the computer device, and the computer device calculates the wear rate based on the received machining conditions. may identify information about

This computer device is capable of communication connection with a plurality of machine tools, receives machining conditions from the plurality of machine tools, and transmits information on the wear rate specified based on the received machining conditions to the corresponding machine tool. can be sent to

A system according to a third embodiment and a fourth embodiment, which will be described later, controls the load applied to the polishing tool 1 during polishing and/or the amount of change in the load within a predetermined range according to the processing conditions. It is possible to specify control information for controlling the position of the polishing tool 1 in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material 6 of the polishing tool 1 in the Z-axis direction. In addition, the system according to the third embodiment and the fourth embodiment has a Z-axis direction of the polishing tool 1 for setting the depth of cut of the polishing tool to the workpiece within a predetermined range according to the processing conditions. , or the control information for controlling the amount of projection or depth of cut of the grinding material 6 of the grinding tool 1 in the Z-axis direction.

In a system that specifies control information according to such machining conditions, the machine tool to which the polishing tool 1 is attached may function as a computer device that specifies control information. In this case, the machine tool controls the position of the polishing tool 1 in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material 6 of the polishing tool 1 in the Z-axis direction according to the specified control information.

Further, in a system that specifies control information according to such processing conditions, a computer device different from the machine tool may function as a computer device that specifies control information for the grinding material 6 of the polishing tool 1 . In this case, this computer device can transmit the specified control information to the machine tool or sharpener holder 2 . The machine tool controls the position of the polishing tool 1 in the Z-axis direction according to the received control information. Further, in the polishing tool holder 2, the amount of projection or depth of cut of the polishing material 6 in the Z-axis direction is controlled according to the received control information.

In this case, the machining conditions are input by a machine tool or a device different from the machine tool, the input machining conditions are transmitted to the computer device, and the computer device generates control information based on the received machining conditions. may be generated.

This computer device is capable of communication connection with a plurality of machine tools, receives machining conditions from the plurality of machine tools, and transmits control information generated based on the received machining conditions to the corresponding machine tools. can do.

A system according to a first embodiment, which will be described later, uses a computer device to associate information about processing conditions when polishing a workpiece 7 with a polishing tool 1, and obtain information about the wear rate of the abrasive material 6 of the polishing tool 1 under the processing conditions. Information is stored in a master table (wear rate table, which will be described later), and the wear rate of the abrasive material 6 of the polishing tool 1 is specified by referring to the master table according to the input processing conditions. The information on the machining conditions and the information on the wear rate stored in this master table may be supplemented by information received from other devices. For example, when the workpiece is polished by another device, the information on the processing conditions at this time and the information on the measured wear rate are associated and additionally stored in the master table of the computer device. By doing so, the accuracy of the specified wear rate is increased.

A system according to a second embodiment, which will be described later, has a computer device, in which information about the processing conditions for polishing the workpiece 7 is used as input data, and information about the wear rate of the abrasive material 6 of the polishing tool 1 under these processing conditions is output. Using a prediction model (learning model) machine-learned as data, the wear rate of the abrasive material 6 under the input processing conditions is specified. Here, information received from another device may be used as training data for this prediction model. For example, when the workpiece 7 is polished by another device, information on processing conditions is used as input data, and information on the measured wear rate is used as output data. By doing so, the accuracy of the specified wear rate is increased.

A system according to a third embodiment, which will be described later, stores control information in a master table (control information table, which will be described later) in association with information about processing conditions when polishing a workpiece 7 with a polishing tool 1 in a computer device. ), and the control information is specified by referring to the master table according to the input processing conditions. The information on the processing conditions and the control information stored in this master table may be added by information received from other devices. For example, when the workpiece is polished by another device, the information about the processing conditions at this time, the load applied to the polishing tool 1 and/or the amount of change in the load are within a predetermined range. Control information for controlling the position of the workpiece 7 in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material 6 in the Z-axis direction is associated and additionally stored in the master table of the computer device. Further, for example, when the workpiece 7 is polished by another device, information on the processing conditions at this time and the position of the workpiece in the Z-axis direction of the polishing tool 1 so that the depth of cut is within a predetermined range. Alternatively, control information when controlling the amount of protrusion or depth of cut of the grinding material 6 in the Z-axis direction is associated and additionally stored in the master table of the computer device. By doing so, the accuracy of the specified control information is increased.

A system according to a fourth embodiment, which will be described later, has a computer device, in which information on processing conditions for polishing the workpiece 7 is used as input data. can be set within a predetermined range, or control information that can set the depth of cut within a predetermined range as output data, using a machine-learned predictive model, in the input processing conditions It specifies the control information of the grinding material 6 . Here, information received from another device may be used as training data for this prediction model. For example, when the work 7 is polished by another device, information on the processing conditions is used as input data, and control information in which the load applied to the polishing tool 1 and/or the amount of change in the load is within a predetermined range; Alternatively, the control information that sets the depth of cut of the polishing tool 1 within a predetermined range is used as the output data. By doing so, the control information that the load applied to the polishing tool 1 and/or the amount of change in the load according to the input processing conditions is within a predetermined range, or the depth of cut of the polishing tool 1 is set to a predetermined value. It is possible to obtain control information within the range.

<First embodiment>
In the first embodiment, information on the wear rate of the abrasive material of the polishing tool under the processing conditions is stored in association with information on the processing conditions when the work is polished by the polishing tool, and the work is polished. The present invention relates to a system for identifying the wear rate of an abrasive material corresponding to actual processing conditions. Based on the specified wear rate, the system adjusts the load applied to the polishing tool and/or the amount of change in the load when polishing under the processing conditions to be within a predetermined range, or the cutting of the polishing tool to the workpiece. Control information is generated for controlling the position of the polishing tool in the contact direction in contact with the workpiece or the amount of protrusion or the depth of cut of the abrasive material in the contact direction so that the amount of indentation falls within a predetermined range.

FIG. 3 is a flowchart of control information generation processing according to the embodiment of the present invention. A case will be described below in which a computer device provided in a machine tool identifies the wear rate and generates control information. First, the user inputs various machining conditions via the display section provided in the machine tool. Arbitrary conditions can be input as the processing conditions to be input. The machining conditions to be input may be the conditions for actually polishing the workpiece, or hypothetical conditions for the purpose of estimating the wear rate, etc., although the workpiece is not actually machined.

The processing conditions are the conditions for polishing the work, and refer to conditions that can affect the processing of the work and the wear of the abrasive material. The processing conditions include, for example, the material and physical properties of the work, the type and physical properties of the polishing tool used for processing, the state of the work before processing such as the state of burrs, and the quality of the work after processing. In addition to these conditions, conditions (temperature, humidity, etc.) related to the environment in which the workpiece is processed may be included in the processing conditions. The input conditions are stored in the memory of the machine tool. A case will be described below in which information about a workpiece, the state of burrs before machining, and the quality after machining are input as machining conditions.

FIG. 4 is a diagram showing an example of a display screen of a display unit according to the embodiment of the present invention; The display screen 50 is configured so that the user can input information 51 on the workpiece, burr state 52, and post-machining quality 53 for each condition input by the user, for example, by selecting numerical values or selecting numerical values. . Input of each condition will be described below.

Input of work-related information 51 is accepted by the user's operation on the display unit (step S1). Information about the workpiece includes information about hardness and/or tensile strength of the workpiece and specific cutting resistance. If the hardness value is proportional to the tensile strength value, the tensile strength may be calculated from the hardness, or the hardness may be calculated from the tensile strength, and input of either one of the information may be accepted. may Furthermore, it is also possible to receive input of information on the surface properties of the surface to be processed (whether or not it is a material surface, surface roughness, etc.). In other words, the information about the work includes material properties representing properties based on the quality of the material forming the work.

FIG. 5 is a diagram showing a material master table according to the embodiment of the invention. The material master table 60 is stored in the memory of the machine tool. The material master table 60 stores a hardness 63, a tensile strength 64, and a specific cutting resistance 65 in association with a classification code 62 for each work material 61. FIG. The work material 61 is classified into 7 series according to the selection criteria of cemented carbides of ISO and JIS-B50431. The hardness 63, the tensile strength 64, and the specific cutting resistance 65 can each be set to a value measured by a predetermined measuring method. As the information 51 about the work, the material 61 and the classification code 62 shown in FIG. 5 may be input (FIG. 4). The user can set the conditions by simply inputting the material 61 and the classification code 62 along the material master table 60 without inputting various physical properties of the material 61 .

Next, the input of information on the burr state 52 of the workpiece before machining is accepted by the user's operation on the display unit (step S2). Next, the input of information on the post-processing quality 53 is accepted by the user's operation on the display unit (step S3). FIG. 6 is a diagram showing the state of burrs generated on a workpiece before machining according to the embodiment of the present invention. FIG. 6(a) shows a vertical burr, which is a burr that protrudes vertically from the upper surface of the workpiece. In the case of vertical burrs, the length of the burr in the horizontal direction on the upper surface of the work is called "burr thickness", and the length of the burr in the vertical direction of the work is called "burr height". FIG. 6(b) shows a horizontal burr, which is a burr that protrudes horizontally from the upper surface of the workpiece. In the case of horizontal burrs, the length of the burr in the horizontal direction on the upper surface of the workpiece is called "burr height", and the length of the burr in the vertical direction on the upper surface of the workpiece is called "burr thickness". Burrs caused by machining such as cutting, drilling, etc. can be classified as either vertical burrs or horizontal burrs.

FIG. 7 is a diagram showing the workpiece after processing according to the embodiment of the present invention. 7(a) and 7(b) are horizontal views of the edge of the workpiece after machining. Here, an edge is an intersection of two surfaces, a surface parallel to the vertical direction of the workpiece and a surface perpendicular to the workpiece. Moreover, an intersection part means a ridgeline.

FIG. 7(a) shows the state after machining when the upper surface of the workpiece is inclined more gently than the side surface of the workpiece. The workpiece in FIG. 7A is machined such that the top surface quality, which is the length after machining in the horizontal direction of the upper surface of the workpiece, is longer than the depth quality, which is the length after machining in the vertical direction of the upper surface of the workpiece. FIG. 7(b) shows the state after processing when the side surface of the workpiece is slanted more gently than the upper surface. The workpiece shown in FIG. 7B is processed longer for depth quality than for top surface quality.

FIG. 8 is a diagram representing an edge quality master table according to an embodiment of the present invention. Edge quality master table 70 stores dimensions 72 in association with edge quality designations 71 . For example, the edge quality designation 71 is obtained by using, as a reference point, the angle formed by the top surface and the side surface of the workpiece at which the top surface and the side surface intersect, that is, the so-called pin angle of the edge. When set to "0", the height and thickness dimensions of the burr before processing are defined in the positive direction, and the top surface quality and depth quality dimensions after processing are defined in the negative direction to express the edge quality standard. It is the one that was made. The edge quality is specified in Japanese Industrial Standards (see JIS B0721-2004), but is not limited to this, and independently defined edge quality standards may be used.

To explain in more detail using the edge quality master table 70, for example, when the edge quality designation 71 is "minus 2", the dimension 72 must be -0.2 mm or less calculated from the reference point. indicates Similarly, when the edge quality designation 71 is "plus 1", it indicates that the dimension 72 is greater than 0 and less than +0.2 mm calculated from the reference point. When the vertical burr shown in FIG. 6A has a height of +0.3 mm and a thickness of +0.1 mm, the burr height is "plus 2" and the burr thickness is "plus 1". Similarly, when the top surface quality shown in FIG. 7A is −0.4 mm and the depth quality is −0.1 mm, the top surface quality is “minus 2” and the depth quality is “minus 1”. becomes.

The information about the state of the burr input in step S2 is, for example, the burr thickness and height of the vertical burr shown in FIG. 6(a) or the horizontal burr shown in FIG. 6(b). This is information indicating which dimension 72 in the edge quality master table corresponds. That is, the edge quality designation 71 corresponding to the relevant dimension 72 can be set as the edge burr condition. For example, if the vertical burr shown in FIG. 6A has a height of +0.3 mm and a thickness of +0.1 mm, then in step S2, the burr height is "plus 2" and the burr thickness is "Plus 1" is entered. The size of the burr may be measured automatically by scanning control or a visual sensor, or may be manually measured by the user.

The information about the post-processing quality input in step S3 is, for example, the top surface quality or depth quality shown in FIG. 7(a) or FIG. The edge quality designation 71 is used to indicate whether the edge quality corresponds to the dimension 72 of . That is, the edge quality designation 71 corresponding to the relevant dimension 72 can be set as the edge burr condition. Here, the processing user directly inputs the desired edge quality value, or refers to the dimensions 72 stored in the edge quality master table 70 and selects one of the edge quality designations 71. , the quality after processing may be specified. By designing in this way, the user can perform the processing only by being conscious of the quality after processing, and can intuitively and efficiently set the processing conditions.

If there are burrs of multiple sizes, the size of the burr may be used as information for inputting the maximum size. Further, by inputting the measured data, the edge quality master table 70 may be referred to and the edge quality may be automatically selected.

It should be noted that it is not possible to set information with a lower standard than the information regarding the state of burrs received in step S2 in the information regarding quality after processing. Criteria can be set, for example, that "minus 2" is the lowest and "plus 2" is the highest. At this time, if the state of burrs is minus one, the post-processing quality cannot be set to plus one. That is, the quality after processing cannot be increased for the burr state.

In the first embodiment, the processing conditions may include information on the polishing tool used for processing. The selection may be made based on the information about the workpiece received in step S1 or the information about the state of the burr received in step S2.

When inputting information about a polishing tool to be used for processing as a processing condition, a polishing tool master table as shown in FIG. 9 can be prepared. A polishing tool master table 80 stores, for example, a polishing tool diameter 82, a wire type 83, a wire length 84, and a number of segments 85 in association with a polishing tool No.81.

Abrasive tool diameter 82 represents the diameter of the blade portion and brush portion of the abrasive tool that are used for processing. The wire type 83 represents the material of the blade portion and brush portion used for execution of processing. The wire length 84 represents the length of the blade portion or brush portion used to perform processing. The number of segments 85 represents the number of bundles of brushes when the polishing tool has a brush portion. In addition to this information, whether or not the material 61 stored in the material master table 60 is suitable for use may be stored for each polishing tool No. 81 . Information registered in the polishing tool masters, such as polishing tool No. 81, polishing tool diameter 82, wire type 83, wire length 84 and/or number of segments 85, is displayed on the display unit for a plurality of polishing tools 1. It is possible to input which one of these polishing tools 1 is to be used.

Next, the machine tool receives input of the polishing conditions 54 via the display unit (step S4). The polishing conditions 54 specifically define the relative positional relationship and speed between the workpiece and the polishing tool used for processing, and include the rotation speed of the workpiece or polishing tool, the feed speed of the work or polishing tool, and conditions such as depth of cut. All of these polishing conditions 54 can be treated as variables, but it is also possible to treat one of the polishing conditions 54, such as the rotation speed of the polishing tool, as a variable and the other conditions as constants.

The rotation speed means the speed at which the workpiece or polishing tool rotates per unit time, and is also called the number of revolutions. The feed speed refers to the relative speed in the XY plane between the polishing tool used for processing and the work. As described above, the depth of cut refers to the amount by which the tip of the polishing tool is pushed into the surface of the workpiece in one process.

In the machine tool, when the input of information from steps S1 to S4 is received, the control unit of the machine tool refers to the wear rate master table to specify the information on the wear rate of the abrasive material corresponding to the accepted processing conditions. (step S5). For example, the workpiece material is "stainless", the burr height is "plus 2", the burr thickness is "plus 2", the top surface quality is "minus 2", and the depth quality is "minus 2". , and when the polishing condition is "4000/min" and input in steps S1 to S4, the wear rate per unit distance is specified as 0.6 mm/mm. The "wear rate per unit distance" is obtained by dividing the wear amount of the abrasive material by the processing distance of the workpiece. Here, the processing distance of the work is the distance of the work processed by the polishing tool. For example, when the polishing tool is moved while the workpiece is fixed, the moving distance of the polishing tool on the XY plane is the machining distance of the workpiece. Further, for example, when the work is processed by moving while the polishing tool is fixed, the moving distance of the polishing tool on the XY plane becomes the processing distance of the work. When the work is processed in a fixed state, the moving distance of the polishing tool on the XY plane is 10 mm, and if the abrasive material of the polishing tool is worn by 5 mm due to this processing, the wear rate per unit distance is 0.5 mm. / mm.

FIG. 10 is a diagram representing a wear rate master table according to an embodiment of the present invention. Wear rate table 90 stores wear rate 95 in association with work material 91, burr state 92, post-machining quality 93, and polishing conditions 94, for example. The burr condition 92 includes a burr height 92a and a burr thickness 92b. The burr height 92 a and burr thickness 92 b are registered using the edge quality designation 71 . The post-processing quality 93 includes top surface quality 93a and depth quality 93b. The top surface quality 93a and the depth quality 93b are similarly registered under the edge quality name 71. FIG. The polishing conditions 94 are registered with the elements of the polishing conditions 54 that affect the wear rate. The wear rate 95 is, for example, the length of wear (or the amount of wear) of the abrasive material of the polishing tool per unit distance, and is based on the predetermined workpiece material 91, burr state 92, post-processing quality 93, and polishing. In the condition 94, the wear rate of the abrasive material when actually polishing the workpiece by rotating the polishing tool is measured and stored in advance. At step S5, the wear rate 95 corresponding to the machining conditions input at steps S1 to S4 is specified. As the wear rate 95, the length of wear (or the amount of wear) of the abrasive material of the polishing tool per unit time is calculated based on the predetermined work material 91, burr state 92, post-processing quality 93, and polishing conditions 94. Alternatively, the wear rate of the abrasive material when the work is actually polished by rotating the polishing tool may be measured and stored in advance.

Based on the information about the specified wear rate, the load applied to the polishing tool and / or the amount of change in the load can be maintained within a predetermined range (or a predetermined value), or the depth of cut of the polishing tool is a predetermined amount. The position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction (that is, the value of (Lb - La)) is controlled so that it can be maintained within the range of (predetermined value) The control information for performing is generated (step S6).

FIG. 11 is a diagram showing an example of the load and the load change amount according to the embodiment of the present invention. In FIG. 11, the horizontal axis is time, and the vertical axis is the amount of load of the grinding material 6 applied to the polishing tool. Polishing is started with the depth of cut input by the user as a processing condition. The depth of cut at the start of polishing is the upper limit of the predetermined range of depth of cut. The predetermined range of the depth of cut may be automatically set based on the upper limit of the depth of cut, and the user inputs not only the upper limit of the depth of cut but also the lower limit of the depth of cut as a processing condition. good too. When the lower limit of the depth of cut is automatically set based on the upper limit of the depth of cut, a value obtained by subtracting a predetermined value from the upper limit may be used as the lower limit. You may calculate by multiplying a smaller coefficient.

As shown in FIG. 11, at the start of polishing, the load applied to the polishing tool 1 is at its upper limit. When the position of the grinding tool 1 in the Z-axis direction is constant and the amount of protrusion of the grinding material 6 in the Z-axis direction is constant, the grinding material 6 wears as the workpiece 7 is processed by the grinding tool 1. The depth of cut becomes smaller. When the depth of cut becomes smaller and reaches the lower limit of the depth of cut, the load applied to the polishing tool 1 also reaches the lower limit. Here, in order to maintain the processing accuracy, while continuing polishing, the position of the polishing tool 1 in the Z-axis direction is controlled so as to approach the workpiece 7, or the polishing material 6 is continuously moved. By controlling the amount of protrusion in the Z-axis direction to be large, the depth of cut is increased, and accordingly the amount of load applied to the polishing tool 1 is increased.

When the depth of cut increases and reaches the upper limit of the depth of cut, the load applied to the polishing tool 1 also reaches the upper limit. When the upper limit of the depth of cut is reached, the depth of cut is reduced by stopping the movement of the polishing tool 1 in the Z-axis direction or by stopping the increase in the amount of protrusion of the grinding material 6 in the Z-axis direction. turns from an increase to a decrease. By repeating these controls, the depth of cut, the load applied to the polishing tool 1, and/or the amount of change in the load can be maintained within a predetermined range.

In step S6, based on the specified wear rate, for example, by repeating the control as described above, the depth of cut can be maintained within a predetermined range, or the load and the load change amount can be maintained within a predetermined range. Control information is generated for the position of the polishing tool 1 in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material 6 in the Z-axis direction that can be maintained within the range of . The machine tool processes the workpiece according to the control information.

In the first embodiment, when the control unit of the machine tool receives input of the workpiece material, burr state, post-machining quality, and polishing conditions, the wear rate table is referred to for the information on the wear rate. A description has been given of a mode for identifying information on the wear rate stored in the speed table. and a predetermined relational expression is stored, and the control unit of the machine tool, based on the input work material, burr state, post-machining quality, polishing conditions, and the stored relational expression, It may be a mode of specifying information about the wear rate.

In the first embodiment, input reception in steps S1 to S4 was explained as being received via the display unit of the machine tool. can be entered. In addition to performing the input operation at the work place where the machine tool is located, the input operation can be performed at a place other than the work place (for example, the location of the orderer who requests the work place having the machine tool to process). Further, the acceptance of inputs in steps S1 to S4 may be performed by reading data.

<Second Embodiment>
The second embodiment uses a machine-learned predictive model with information on the processing conditions for polishing the workpiece as input data and information on the wear rate of the abrasive material of the polishing tool under the conditions as output data. to a system that identifies information about the wear rate of an abrasive material under actual machining conditions. Based on the specified wear rate, the system adjusts the load applied to the polishing tool and/or the amount of change in the load when polishing under the processing conditions to be within a predetermined range, or the cutting of the polishing tool to the workpiece. Control information is generated for controlling the position of the polishing tool in the contact direction in contact with the workpiece or the amount of protrusion or the depth of cut of the abrasive material in the contact direction so that the amount of indentation falls within a predetermined range.

A case will be described below in which a computer device provided in a machine tool identifies the wear rate and generates control information.

(prediction model)
In the second embodiment, the storage unit of the machine tool contains, as input data, information relating to the processing conditions for polishing the workpiece, and as output data, information relating to the wear rate of the abrasive material of the polishing tool under the processing conditions. A machine-learned prediction model is stored. Machine learning algorithms are not particularly limited, and known ones can be used, for example, linear regression, multiple regression analysis, support vector machines, decision trees, random forests, deep learning using multilayer neural networks is mentioned.

A multilayer neural network has an input layer, an output layer, and multiple intermediate layers. Weights are set for edges connecting nodes in each layer. The edge is assigned a weight corresponding to each input to the node, multiplied by the weight corresponding to each input to the node, and added to the value obtained by multiplying these weights and the bias. The values obtained by the addition are non-linearly transformed using an activation function to calculate an activation value. The calculated activation value becomes the value of the input passed to the node in the next layer. The number of intermediate layers can be designed appropriately. Weights are optimized by the training data.

The information about the processing conditions when polishing the workpiece as the input data includes, for example, the material of the workpiece, the state of burrs (burr height, burr thickness), quality after processing (top surface quality, depth quality), Information about the polishing tool and/or polishing conditions are included. On the other hand, as the output data, information on the wear rate of the abrasive material when actually polishing the workpiece under these processing conditions is stored.

(Specifying processing of control information)
The identification of the information on the wear rate of the abrasive material can be executed along the flowchart of the control information identification processing shown in FIG. 3, as in the first embodiment. First, the machine tool receives input of information 51 on the workpiece via the display unit (step S1). Next, the machine tool accepts input of information on the burr state 52 of the workpiece before machining via the display unit (step S2), and further accepts input of information on the quality 53 after machining (step S3). . The machine tool receives the input of the polishing conditions 54 via the display (step S4).

In the machine tool, when the input of the information from steps S1 to S4 is received, the control unit of the machine tool uses the information on the processing conditions for polishing the workpiece as input data, and determines the abrasive material of the polishing tool under the processing conditions. Information on the wear rate of the abrasive material corresponding to the received processing conditions is identified using a predictive model machine-learned with the information on the wear rate of the abrasive as output data (step S5). In the second embodiment, based on the above-specified information about the wear rate, the load applied to the polishing tool and/or the amount of change in the load is within a predetermined range (or the depth of cut of the polishing tool is Control information for controlling the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction (that is, the value of (Lb−La)) is generated so that it falls within a predetermined range). (step S6).

In the second embodiment, it is assumed that the inputs in steps S1 to S4 are received via the display unit of the machine tool. It may be entered in other possible devices. Further, the acceptance of inputs in steps S1 to S4 may be performed by reading data.

<First Embodiment and Second Embodiment>
In the first embodiment and the second embodiment, the machine tool is used as an example of a computer device for specifying information about the wear rate of the present invention. Determining the wear rate information may be performed in a computer device. Further, the determination of the wear rate may be performed only by the machine tool, or may be performed in a system in which the machine tool and other devices cooperate.

In the first embodiment and the second embodiment, the step of controlling the position of the polishing tool in the Z-axis direction or the amount of projection or depth of cut of the grinding material in the Z-axis direction based on the control information includes: Although the control unit of the machine tool has been described as an example, it may be controlled by the control unit of a microcomputer provided in the polishing tool holder connected to the machine tool.

A case where a machine tool cooperates with other devices to execute a program will be described below. When the program is executed on the machine tool and the server device, the machine tool executes the step of receiving the input of each condition in steps S1 to S4 in the process of specifying the control information in FIG. 3, and specifies the information on the wear rate in step S5. It is conceivable that the step of performing is executed in the server device. After identifying information about the wear rate in the server device, the step of generating control information based on the identified information about the wear rate is executed in the server device, and is transmitted to the control unit of the machine tool. Information about the wear rate thus obtained may be transmitted to the control unit of the machine tool, and the control unit of the machine tool may execute the step of generating the control information.

The step of controlling the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material in the Z-axis direction based on the control information generated by the control unit of the machine tool is performed by the control unit of the machine tool. may be executed in the controller of a microcomputer provided in the polishing tool holder connected to the machine tool. In this case, the generated control information shall be transmitted to the control section of the machine tool or microcomputer that executes the control by means of communication as necessary.

Further, in addition to the machine tool and the server device, when the program is executed by another computer device that can communicate with the machine tool and the server device, input of each condition of steps S1 to S4 in the control information specifying process of FIG. It is conceivable that the step of receiving is performed in another computer device, and the step of specifying the information on the wear rate in step S5 is performed in the server device. After specifying the information on the wear rate in the server device, the step of generating the control information based on the specified information on the wear rate is executed in the server device and transmitted to the control section of the machine tool via the communication section. , the aspect executed in the server device and transmitted to another computer device via the communication unit, and the information about the specified wear rate are sent to the control unit of the machine tool or another computer device via the communication unit. , and the step of generating the control information may be executed in a machine tool controller or other computer device.

The step of controlling the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction based on control information generated in a control unit of a server device, machine tool, or other computer device, It may be executed in the control section of the machine tool, or may be executed in the control section of a microcomputer provided in the polishing tool holder connected to the machine tool. In this case, the generated control information shall be transmitted to the control section of the machine tool or microcomputer that executes the control by means of communication as necessary.

<Third Embodiment>
In the third embodiment, the load applied to the polishing tool and/or the amount of change in the load applied to the polishing tool when polishing is performed under the processing conditions is set within a predetermined range in association with information about the processing conditions when the work is polished by the polishing tool. Control information for controlling the position of the polishing tool in the contact direction in contact with the work for polishing, or the amount of protrusion or depth of cut in the contact direction of the abrasive material of the polishing tool, and the processing conditions when polishing the work. Regarding the system, identifying the corresponding control information. Further, in the third embodiment, the polishing tool is associated with information about processing conditions when polishing a workpiece with the polishing tool, and the polishing tool is used to set the depth of cut of the polishing tool into the workpiece within a predetermined range under the processing conditions. store control information for controlling the position in the contact direction of contact with the work or the amount of protrusion of the abrasive material of the polishing tool in the contact direction, and specify the control information corresponding to the processing conditions when polishing the work; Regarding the system.

A case of specifying control information in a computer device provided in a machine tool will be described below.

The descriptions of the material master table of FIG. 5, the edge quality master table of FIG. 8, and the polishing tool master table of FIG. 9 in the first embodiment are similarly applied to the third embodiment. The description of the state of burrs on the workpiece before machining in FIG. 6 and the workpiece after machining in FIG. 7 in the first embodiment also applies to the third embodiment. Furthermore, the description of the display screen in FIG. 4 in the first embodiment also applies to the third embodiment.

The identification of the control information can be executed along the flowchart of the control information identification processing shown in FIG. 12 . First, the machine tool receives input of information 101 on the workpiece (step S11). Next, the machine tool accepts input of information on the burr state 102 of the workpiece before machining via the display unit (step S12), and accepts input of information on the quality 103 after machining (step S13). The machine tool receives input of the polishing conditions 104 via the display unit (step S14). Arbitrary conditions are input as the processing conditions input in steps S11 to S14. The machining conditions to be input may be the conditions when the work is actually polished from now on, or may be hypothetical conditions for the purpose of predicting the control information, although the work is not actually machined.

In the machine tool, when the input of the information from step S11 to step S14 is received, the control unit of the machine tool refers to the control information master table to specify the control information corresponding to the received machining conditions (step S15).

FIG. 13 is a diagram showing a control information master table according to the embodiment of the invention. In the control information master table 100, for example, a wear rate 105 is stored in association with a workpiece material 101, a burr state 102, a post-machining quality 103, and a polishing condition 104. FIG. The burr state 102 includes a burr height 102a and a burr thickness 102b. The burr height 102 a and burr thickness 102 b are registered using the edge quality designation 71 . The post-processing quality 103 includes top surface quality 103a and depth quality 103b. The top surface quality 103a and the depth quality 103b are similarly registered in the edge quality designation 71. FIG. The polishing conditions 104 are registered with the elements of the polishing conditions 54 that affect the wear rate.

The control information 105 is for setting the load applied to the polishing tool and/or the amount of change in the load to a predetermined range (or a predetermined value), or the depth of cut of the polishing tool to a predetermined range (or a predetermined value). This is information for controlling the position of the polishing tool in the Z-axis direction, or the amount of projection or depth of cut in the Z-axis direction of the abrasive material of the polishing tool (that is, the value of (Lb−La)). The control information 105 is the load applied to the polishing tool when the polishing tool is actually rotated and the workpiece is polished under the predetermined workpiece material 101, burr state 102, post-processing quality 103, and polishing conditions 104. / Or control information capable of controlling the amount of change in load within a predetermined range or control information capable of controlling the amount of cutting of the polishing tool within a predetermined range is stored in advance. At step S15, the control information 105 corresponding to the processing conditions input at steps S11 to S14 is specified.

More specifically, the control information 105 is the position of the polishing tool in the Z-axis direction or the value of (Lb-La) in the Z-axis direction of the abrasive material of the polishing tool until a predetermined time has elapsed from the start of polishing. without changing the position of the polishing tool in the Z-axis direction or the value of (Lb-La) in the Z-axis direction of the abrasive material of the polishing tool at a predetermined speed after a predetermined first time has elapsed. Furthermore, after a predetermined second time has elapsed, control is repeated such that the position of the polishing tool in the Z-axis direction or the change in the value of (Lb−La) in the Z-axis direction of the abrasive material of the polishing tool is stopped. It is what makes it possible to execute.

Based on the generated control information, the control unit of the machine tool controls the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material in the Z-axis direction. A machine tool performs machining of a workpiece at a controlled position or amount of protrusion or depth of cut.

In the third embodiment, the input reception in steps S11 to S14 was explained as being received via the display unit of the machine tool, but it is assumed that the input is made in another device that can communicate with the machine tool by wire or wirelessly. can do. Further, the input reception in steps S11 to S14 may be performed by reading data.

<Fourth Embodiment>
A fourth embodiment provides information on processing conditions when polishing a workpiece, and a polishing tool for setting the load applied to the polishing tool and/or the amount of change in the load when polishing is performed under the processing conditions within a predetermined range. Using a machine-learned predictive model as teaching data, the position of the contact direction in contact with the work or the control information for controlling the amount of protrusion or depth of cut of the abrasive material of the polishing tool in the contact direction A system for specifying control information in processing conditions. In the fourth embodiment, there is provided information on processing conditions when polishing a work, and a polishing tool for making the depth of cut of the polishing tool into the work within a predetermined range under the processing conditions. Control information under actual processing conditions using a predictive model machine-learned using as teaching data control information for controlling the position in the contact direction or the amount of projection or depth of cut of the abrasive material of the polishing tool in the contact direction. to identify the system.

A case of specifying control information in a computer device provided in a machine tool will be described below.

(prediction model)
In the fourth embodiment, the storage unit of the machine tool contains information on the processing conditions for polishing the workpiece as input data, and when the workpiece is polished under the processing conditions, the load and/or load applied to the polishing tool is Alternatively, the teacher data includes control information for controlling the position of the polishing tool in the Z-axis direction or the amount of projection or depth of cut in the Z-axis direction of the abrasive material of the polishing tool so that the amount of change in the load is within a predetermined range. A prediction model machine-learned as is stored. In the fourth embodiment, the storage unit of the machine tool contains information on the processing conditions for polishing the workpiece as input data, and when the workpiece is polished under the processing conditions, the depth of cut of the polishing tool is set as input data. Prediction machine-learned using as teacher data the position of the polishing tool in the Z-axis direction or the control information for controlling the amount of projection or depth of cut of the abrasive material of the polishing tool in the Z-axis direction to achieve a predetermined range. A model is stored. Machine learning algorithms are not particularly limited, and known ones can be used, for example, linear regression, multiple regression analysis, support vector machines, decision trees, random forests, deep learning using multilayer neural networks is mentioned.

A multilayer neural network has an input layer, an output layer, and multiple intermediate layers. Weights are set for edges connecting nodes in each layer. The edge is assigned a weight corresponding to each input to the node, multiplied by the weight corresponding to each input to the node, and added to the value obtained by multiplying these weights and the bias. The values obtained by the addition are non-linearly transformed using an activation function to calculate an activation value. The calculated activation value becomes the value of the input passed to the node in the next layer. The number of intermediate layers can be designed appropriately. Weights are optimized by the training data.

The information about the processing conditions when polishing the workpiece as the input data includes, for example, the material of the workpiece, the state of burrs (burr height, burr thickness), quality after processing (top surface quality, depth quality), Information about the polishing tool and/or polishing conditions are included. On the other hand, the output data includes the upper limit or lower limit of the load applied to the polishing tool (the upper limit or lower limit of the amount of change in the load) and the Z-axis direction of the polishing tool when the workpiece is actually polished under these processing conditions. Control information of the position or the amount of protrusion or depth of cut of the grinding material of the grinding tool in the Z-axis direction is stored. Alternatively, as the output data, the upper or lower limit of the depth of cut of the polishing tool when actually polishing the workpiece under these processing conditions, the position of the polishing tool in the Z-axis direction, or the Z Control information for the amount of protrusion or depth of cut in the axial direction is stored.

(Specifying processing of control information)
The identification of the information on the wear rate of the abrasive material can be performed along the flowchart of the control information identification process shown in FIG. 12, as in the third embodiment. First, the machine tool receives input of information 101 on the workpiece via the display unit (step S11). Next, the machine tool accepts input of information on the burr state 102 of the workpiece before machining via the display unit (step S12), and accepts input of information on the quality 103 after machining (step S13). The machine tool receives input of the polishing conditions 104 via the display unit (step S14).

In the machine tool, when the input of the information from steps S11 to S14 is received, the control unit of the machine tool uses the information on the processing conditions for polishing the workpiece as input data, and determines the abrasive material of the polishing tool under the processing conditions. Control information corresponding to the received processing conditions is specified using a predictive model machine-learned using information about the wear rate of 1 as output data (step S15). In step S15, the Z-axis direction of the polishing tool is adjusted so that the load applied to the polishing tool and/or the amount of change in the load falls within a predetermined range (or the depth of cut of the polishing tool falls within a predetermined range). Control information is generated for controlling the position or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction (that is, the value of (Lb−La)).

Based on the generated control information, the control unit of the machine tool controls the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the grinding material in the Z-axis direction. A machine tool performs machining of a workpiece at a controlled position or amount of protrusion or depth of cut.

In the fourth embodiment, the prediction model teaching data stored in the storage unit of the machine tool may include information on the machining time from the start of machining and information on the machining path associated with the machining time. In this case, it is possible to more accurately specify information about the wear rate when a predetermined time has passed since the start of machining.

In the fourth embodiment, it is assumed that the inputs in steps S11 to S14 are received via the display unit of the machine tool. It may be entered in other possible devices. Moreover, it is good also as what receives an input without providing specific UI.

Further, the input reception in steps S11 to S14 may be performed by inputting a numerical value, selecting from a menu and inputting, or reading data.

<Third Embodiment and Fourth Embodiment>
In the third and fourth embodiments, a machine tool was used as an example of a device for executing a program for specifying information about the wear rate of the present invention. Any other device may execute the program. Further, the program for specifying information on the wear rate may be executed by the machine tool alone, or may be executed by a system that cooperates with another device that can communicate with the machine tool by wire or wirelessly. .

In the third and fourth embodiments, the step of controlling the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction based on the control information includes: Although the control unit of the machine tool has been described as an example, it may be controlled by the control unit of a microcomputer including at least a control unit and a communication unit provided in a polishing tool holder connected to the machine tool.

A case where a machine tool cooperates with other devices to execute a program will be described below. When the program is executed on the machine tool and the server device, the machine tool executes the step of receiving the input of each condition in steps S11 to S14 in the control information specifying process of FIG. 12, and the step of specifying the control information in step S15. is executed in the server device. After specifying the control information corresponding to the machining conditions in the server device, the control information is transmitted to the control unit of the machine tool, or transmitted to the control unit of the microcomputer provided in the polishing tool holder connected to the machine tool. It is good also as the aspect carried out.

Further, in addition to the machine tool and the server device, when executing the program on another computer device that can communicate with the machine tool and the server device, input of each condition of steps S11 to S14 in the control information specifying process of FIG. It is conceivable that the step of receiving the information is executed in another computer device, and the step of specifying the control information in step S15 is executed in the server device. After specifying the control information corresponding to the machining conditions in the server device, the control information is transmitted to the control unit of the machine tool, or transmitted to the control unit of the microcomputer provided in the polishing tool holder connected to the machine tool. It is good also as the aspect carried out.

The step of controlling the position of the polishing tool in the Z-axis direction or the amount of protrusion or depth of cut of the abrasive material in the Z-axis direction may be executed in the control unit of the machine tool, and may be performed in the polishing tool holder connected to the machine tool. It may be executed in the control unit of the provided microcomputer.

1 polishing tool 2 polishing tool holder 3 large diameter portion 3a feed shaft 4 sleeve
5 shank 6 abrasive 6a abrasive holder 6b through hole 7 work
8 surface to be machined, 50 display screen, 51 information on workpiece, 52 state of burr,
53 quality after processing, 54 polishing conditions, 60 material master table,
70 edge quality master table; 80 sharpener master table;
90 wear rate table, 100 control information table

Claims (13)

A system comprising at least one computer device,
storage means for storing information on the wear rate of the abrasive material of the polishing tool under the conditions in association with information on the conditions under which the work is polished by the polishing tool;
input means for receiving input of conditions for polishing a workpiece;
and identification means for identifying information about the wear rate of the abrasive material corresponding to the received conditions. A system comprising at least one computer device,
input means for receiving input of conditions for polishing a workpiece with a polishing tool;
Using a machine-learned predictive model with information on the conditions for polishing the workpiece as input data and information on the wear rate of the abrasive material of the polishing tool under the conditions as output data, wear of the abrasive material under the received conditions. and identification means for identifying information about speed. Based on the information about the specified wear rate, the position of the polishing tool in the contact direction with the workpiece so that the load applied to the polishing tool and/or the amount of change in the load when polishing under the above conditions is within a predetermined range. 3. The system according to claim 1, further comprising generating means for generating control information for controlling the amount of protrusion or depth of cut of the abrasive material in the contact direction. 4. The system according to claim 3, further comprising control means for controlling the position of the polishing tool in the contact direction or the amount of protrusion or depth of cut of the abrasive material in the contact direction based on the generated control information. 4. The system according to claim 3, further comprising transmitting means for transmitting the generated control information to another computer device different from said one computer device. Based on the information on the specified wear rate, the position of the polishing tool in the contact direction with the workpiece or the protrusion amount of the abrasive material in the contact direction or 3. The system according to claim 1, further comprising generating means for generating control information for controlling the depth of cut. 7. The system according to claim 6, further comprising control means for controlling the position of the polishing tool in the contact direction or the amount of protrusion or depth of cut of the abrasive material in the contact direction based on the generated control information. 7. The system according to claim 6, further comprising transmitting means for transmitting the generated control information to another computer device different from said one computer device. receiving means for receiving information on conditions under which the workpiece was polished by the polishing tool in another device different from the computer device of the first and information on the wear rate of the abrasive material of the polishing tool under the conditions;
2. The system according to claim 1, wherein the storage means stores the received information about the abrasive material wear rate in association with the received information about the conditions. an information receiving means for receiving information on conditions under which the workpiece was polished by the polishing tool in another device different from the computer device described above and information on the wear rate of the abrasive material of the polishing tool under the conditions;
3. The system according to claim 2, wherein the predictive model is machine-learned using information on the received conditions as input data and information on the wear rate of the abrasive material as output data. The information on the conditions is information on the type of abrasive material, the type of work, the rotation speed of the polishing tool, the feeding speed of the polishing tool, the state of the work before polishing, and/or the state of the work after polishing. 11. The system of any of 1, 2, 9 and 10 . A program executed on a computer device,
a computer device;
storage means for storing information on the wear rate of the abrasive material of the polishing tool under the conditions in association with information on the conditions under which the work is polished by the polishing tool;
input means for receiving input of conditions for polishing a workpiece;
A program that functions as an identification means for identifying information about the wear rate of the abrasive material corresponding to the received conditions. A program executed on a computer device,
a computer device;
input means for receiving input of conditions for polishing a workpiece with a polishing tool;
Using a machine-learned predictive model with information on the conditions for polishing the workpiece as input data and information on the wear rate of the abrasive material of the polishing tool under the conditions as output data, wear of the abrasive material under the received conditions. A program that acts as an identification means for identifying information about speed.

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