JP2003058216A - Input program for wear compensation of tool, input device and cnc machine tool with input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operator to easily correct the value of wear compensation recorded in a computer 5a of a CNC(computerized numerical control) machine tool 5 beforehand and to easily obtain information regarding the life of the tool in the middle of working a work. SOLUTION: In an input device or the like, a personal computer 6 is connected with the CNC machine tool 5 by a communication channel 7, required information is obtained from the computer 5a of the CNC machine tool 5 and a tool life information image 3, a program image 1 and a tool path image 2 are displayed on a display 6a in real time. Then, a compensation value input image 4 is displayed by the input of the operator, and when the operator inputs a compensation value to a compensation value input part 4d and clicks a write command 4e, it is inputted to the computer 5a of the CNC machine tool 5. Also, the life information image 3 regarding the tool during working is displayed on the display 6a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called CNC machine tool for performing numerical control by a computer, and an input program for tool wear correction, which has an effect of facilitating input of a correction value for tool wear correction. , Tool wear compensation input device, CN with tool wear compensation input device
C Machine tools, etc. A normal CNC machine tool holds many kinds of tools, and when machining an arbitrary work, the tools are selected in the order entered as a machining program in the computer in advance, and the computer processes each selected tool in advance in the computer. Numerical control is performed so that the tool follows the trajectory input as a program. In the numerical control, the distance between an arbitrary center provided on the spindle of the CNC machine tool (hereinafter simply referred to as "spindle center") and the blade edge of the tool in the original position is input as the shape correction, and the value of the shape correction is entered. The tool is moved by a value obtained by subtracting the distance between the center of the spindle and the machined surface of the workpiece. However, because the machine itself is relatively displaced due to wear of the tool, temperature change, and change over time, a difference occurs between the actual machining result and the planned result. By inputting this deviation as wear correction and reflecting it in numerical control, it becomes possible to machine the work for the first time with the required accuracy. When machining a work with a CNC machine tool, the temperature of the machine itself is kept constant, but the temperature change of the machine itself due to wear of the tool and change of the outside air temperature is always occurring, and the machined work piece is processed. The most frequent work is to inspect and input the result as wear correction.

[0002]

2. Description of the Related Art Conventionally, the work of inputting the wear correction amount is
I went directly to the computer of the machine tool. When the operator inspects the machined work and finds a machining part to be corrected, he / she operates the computer of the CNC machine tool to call the part program display screen included in the machining program of the work to determine which machining part is to be machined. It is checked whether or not it is performed under the tool selection command, and the correction number of the tool to be changed is obtained. Then, the correction number of the tool is input to call the tool correction setting screen, the wear correction amount is input, and the write command is pressed. However, a computer of a CNC machine tool inputs a large number of machining programs for machining various kinds of workpieces, and each machining program is composed of a large number of part programs. Therefore, a huge number of part programs are input to the computer of the CNC machine tool, and skill is required to call the desired part program display screen accurately and quickly. Further, conventionally, many procedures have to be performed for inputting the tool wear correction amount, which has a problem that the work takes time and an operation error occurs. The computer of the CNC machine tool has a tool life management function. This function presets the life of each tool as the machining time or the number of workpieces to be machined and stores it, counts the time machined by the tool or the number of the machines machined, and reaches the set value. Sometimes it is a function to inform the operator that the tool life has expired. However, since there was no function to display in real time information such as the remaining life of the tool currently being machined and when it is necessary to replace the tool, the operator had no idea beforehand. I couldn't prepare for the exchange.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, in which a program image or a tool path image is displayed in advance on a display of a personal computer and an operator edits it. When you inspect the subsequent work and find the machining part you want to correct, just click a part of the program image or tool path image to display the correction value input image for the tool to be corrected on the display and Input program for tool wear compensation, which makes it easy to enter the compensation value for wear compensation.
An object is to provide an input device for tool wear correction, a CNC machine tool with a tool wear correction input device, and the like. Also,
While machining a workpiece with a CNC machine tool, the tool life information regarding the tool in use is acquired and displayed as a tool life information image so that the operator can always check the tool life, and work in advance. It is to allow the person to prepare for the tool change.

[0004]

A program for controlling a personal computer connected to a CNC machine tool via a communication line to realize the function of inputting a correction value for tool wear compensation to the computer of the CNC machine tool. And C
Obtaining tool life information regarding a tool in use and a part program for machining the workpiece from a computer of the CNC machine tool and recording the same in its own recording device during machining of the workpiece by the NC machine tool, With a tool life information image that displays the tool life information, a program image that displays the part program or a tool path image that is obtained by analyzing the part program and converting the part program into tool path data, or either When both the step of displaying both in real time on the display and the operator inputs to specify an arbitrary tool, the correction value input image regarding the tool specified by the operator is displayed on the display, and the operator wears. The step of prompting the user to enter the correction value for the correction, and the operator entering the correction value for the wear correction When performed, the program or the like, characterized in that a step of inputting the correction value in the CNC machine tool computer. In addition, the above-mentioned program and the like are recorded on the hard disk of the personal computer as an input device. Further, a CNC machine tool having the input device is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The personal computer 6 comprises a CPU, hard disk, input device, recording device, display 6a, etc.
It is connected to the computer 5a of the NC machine tool 5 via a communication line 7. The CNC machine tool 5 has a computer 5a, selects a tool in the order input as a machining program in advance by numerical control of the computer 5a, and causes the tool to follow the trajectory previously input as a machining program for each of the selected tools. It is numerically controlled. In this embodiment, C
The NC machine tool 5 has a turret that holds a plurality of tools at the same time, and holds different tools in the respective tool holding parts, or holds the same tool in a plurality of tool holding parts to process a workpiece. is doing. Further, in order to process a plurality of types of works, a plurality of processing programs are input to the computer 5a. Each machining program is composed of a plurality of part programs 1b.
Is a series of commands starting from the tool selection command 1a, and refers to all commands necessary for performing all the machining performed by the selected tool, such as rotation of the spindle, fast feed of the tool, machining feed, and return after machining. . The tool selection command 1a is composed of the tool number or group number of the tool and the offset number of the tool. The tool number is a number assigned to each tool, and the group number is a group number of the same tool displayed when a plurality of the same tools are held.
An offset number is given to each tool for each purpose of use of the tool, a tool number is given to each tool belonging to the group, and an offset number is given for each purpose of use. The purpose of use refers to the difference in machining performed using the same tool.For example, the position of the blade of the tool that processes the workpiece differs depending on the purpose of use, such as machining the outer circumference of the work or the end surface with the same tool. This is because the correction value differs depending on the purpose of use. The offset number is a number indicating the tool correction for each tool recorded in the computer 5a. The offset number is given in advance for each tool number and each purpose of use, and the shape correction and wear correction values are recorded for each offset number. I am doing it. Here, the values of the shape correction and the wear correction are made up of an X value which is a radial distance from the spindle center 2a and a Z value which is an axial distance from the spindle center 2a. The computer 5a also has a tool life management function. This is because the life of each tool is set in advance as the number of workpieces to be machined and stored in the computer 5a, the number of workpieces machined by the tool is counted and recorded, and the counted value becomes a preset value. This is a function to notify the operator when the tool life has expired. Furthermore, in the case of tools with group numbers, the tools are used in the order in which they are registered, and when the life of each individual tool is exhausted, the tool with the next registered number is used. It has the function of managing the entire life as the life of the tool.

The program recorded on the hard disk of the personal computer 6 causes the personal computer to realize the following functions.
First, while machining a workpiece with the CNC machine tool 5, the tool life information regarding the tool in use and the part program 1b for machining the workpiece are acquired from the computer 5a of the CNC machine tool 5 and stored in its own recording device. Record. The recording device is used when processing any one workpiece,
It has the capacity to record the life information of all tools and all part programs 1b, and erases old records as well as inputs new records. Then, a tool life information image 3 displaying the acquired tool life information and a program image 1 displaying the acquired part program 1b.
Then, the part program 1b is analyzed, converted into tool path data, and the tool path image 2 displayed on the image as a tool path 2b, which is a path moved by the tool, is displayed on the display 6a in real time. Here, the tool life information image 3
The display changes each time the tool is changed. In the program image 1, the part program 1b for processing the work is sequentially displayed on the image, and the block being executed is highlighted. The tool path 2b of the tool path image 2 is displayed in different colors for each tool. When the worker clicks on an arbitrary part program 1b of the program image 1 after finishing the work, the clicked part program 1b
That is, the input is made to specify the tool number selected by the tool selection command 1a or the tool that belongs to the selected group and is actually processed. Further, when the user clicks on an arbitrary tool locus 2b of the tool path image 2, it means that the input for designating the tool of the tool number that moved the tool locus 2b is performed. Then, together with the tool life information image 3 regarding the tool with the specified tool number, the correction value input image 4 regarding wear correction regarding the tool with the specified tool number is displayed on the display 6a to prompt the operator to input the correction value. Then, the operator sets the offset number to be corrected by pressing the selection section 4f of the correction value input screen 4, inputs the correction value into the correction value input section 4d, and clicks the write command 4e, and the input correction value is input. Is input to the computer 5a of the CNC machine tool 5.

An example of the tool life image 3 of the tool having the group number 3a is shown in FIG. 2. A life display 3 for displaying the tool life of the entire group together with the group number 3a.
b, Count display 3 that displays the number of workpieces that have already been processed
c, life expectancy reaching time 3d for predicting and displaying the time when the life of the entire group disappears, used rate display 3e for displaying the used rate of tools of the entire group, tool number 3 of each tool
Used rate display for each tool that displays the used rate for each g 3
f, etc. are displayed. For tools without group numbers, the tool number for each tool, tool life,
The count display and used rate are displayed. Next, an example of the program image 1 is shown in FIG. 3, but all the part programs 1 used when machining an arbitrary one work
Since b is displayed according to the order of the command, the trader can operate the scroll bar 1c to see all the part programs 1b for the finished work. When the operator checks the work after machining and finds one that does not fit within the planned accuracy, in the part program image 1, the part program 1b starting from the tool selection command 1a regarding the tool that has been machined with poor accuracy. The correction value input image 4 for wear correction can be called by clicking on. Furthermore, FIG. 4 shows an example of the tool path image 2 in which the tool path data is displayed as a trajectory of the tool. In FIG. 4, the difference in tools is represented by the difference in line type. Is displayed in different colors. Further, in the tool path image 2, the radial distance from the spindle center 2a is shown in the vertical direction, and the axial distance from the spindle center 2a is shown in the horizontal direction. The correction value input image 4 for wear correction can also be called up by clicking on the tool path 2b of the tool that has been machined with poor accuracy in the tool path image 2. When performing complicated machining with a large number of tools, the tool paths 2b will be lined up in multiple layers with a slight position between each other, but if you click in the enlarged state using the enlargement function, you will make a mistake. The correction value input image 4 for wear correction related to the tool is not called. An example of the correction value input image 4 for wear correction is shown in FIG. 5, but the selection unit 4f, the offset number 4a after selection, and the shape correction value 4 input for each selected offset number 4a
b, the wear correction value 4c, etc. are displayed separately for the X value and the Z value. The operator clicks the selection section 4f to select an arbitrary offset number, inputs the necessary correction value into the correction value input section 4d, and clicks the write command 4e to input the correction value input into the correction value input section 4d to the CNC. Input to the computer 5a of the machine tool 5.

[0008]

According to the present invention, when an operator inspects a machined work and finds a machining region to be compensated, the operator should just click a part of the program image 1 or the tool path image 2 to correct the tool. A correction value input image 4 for wear correction is displayed on the display 6a, a program enabling input of wear correction of a tool, an input device composed of a personal computer in which the program is recorded in a hard disk, a CNC machine tool with the input device, etc. Could be provided. Further, according to the present invention, the tool life information image 3,
Since the correction value input image 4 is displayed at the same time as the program image 1 and the tool path image 2, even when the correction value input image for the wrong tool is called up, the correct tool input is simply made on the part program image 1 or the tool path image 2. There is an effect that it is possible to call the correct correction value input image 4 by not performing the operation of inputting again after returning to the original screen only by performing the above. Further, according to the present invention, the tool life image regarding the tool being machined by the CNC machine tool is displayed in real time, and the worker can always check the consumption condition regarding the tool being machined only by looking at the tool life image. Further, there is an effect that the operator can prepare for the tool exchange in advance by obtaining information about when the tool needs to be exchanged.

[Brief description of drawings]

FIG. 1 is an example of a display image on a display of an input device according to the present invention.

FIG. 2 is an example of a tool life information image.

FIG. 3 is an example of a program image.

FIG. 4 is an example of a tool path image.

FIG. 5 is an example of a correction value input image.

FIG. 6 is a configuration diagram of a CNC machine tool according to the present invention.

[Explanation of symbols]

1: Program image 1a: Tool selection command 1
b: Part program 1c: Scroll bar 2: Tool path image 2
a: Spindle center 2b: Tool locus 3: Tool life information image 3
a: Group number 3b: Life display 3c: Count display 3
d: Lifetime estimated time 3e: Used rate display 3f: Used rate display 3
g: Tool number 4: Correction value input image 4a: Offset number 4
b: Shape correction value 4c: Wear correction value 4d: Correction value input section 4
e: Write command 4f: Selection unit 5: CNC machine tool 5
a: computer 6: personal computer 6a: display 7
: Communication line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuya Furukawa             Fuji Machinery, 19 Chasuyama, Yamamachi, Chiryu City, Aichi Prefecture             Manufacturing Co., Ltd. (72) Inventor Masahiro Okada             Fuji Machinery, 19 Chasuyama, Yamamachi, Chiryu City, Aichi Prefecture             Manufacturing Co., Ltd. (72) Inventor Nobuyuki Ishikawa             Fuji Machinery, 19 Chasuyama, Yamamachi, Chiryu City, Aichi Prefecture             Manufacturing Co., Ltd. F-term (reference) 5H269 AB01 BB03 BB07 EE05 QC01                       QD03 QD06

Claims (6)

[Claims] 1. A program for controlling a personal computer, which is connected to a CNC machine tool via a communication line, to allow the personal computer to realize a function of inputting a correction value for tool wear compensation to the computer of the CNC machine tool. Obtaining a part program for machining the work from a computer of the CNC machine tool and recording it in its own recording device during machining of the work by the CNC machine tool, and a program image for displaying the part program or At least one of the tool path image, in which the part program is analyzed and each tool moved to machine the work, is converted into a record (hereinafter simply referred to as "tool path data") and displayed as an image. The step of displaying on the display of the personal computer, and that the operator has input to specify an arbitrary tool First, a step of displaying a correction value input image for the tool designated by the operator on the display, and when the operator inputs a correction value for wear correction and issues a write command, the correction value is CNC machined. And a step of inputting to a computer of a machine. 2. The program according to claim 1, wherein after the operator inputs to designate an arbitrary tool,
A program for displaying a correction value input image relating to a tool designated by an operator together with one or both of a program image and a tool path image on a display. 3. A program for causing a personal computer to realize a function of controlling a personal computer connected to a CNC machine tool via a communication line and inputting a correction value for tool wear compensation to the computer of the CNC machine tool, Obtaining tool life information regarding a tool in use and a part program for machining the workpiece from a computer of the CNC machine tool while recording the workpiece in the CNC machine tool, and recording it in its own recording device, With a tool life information image that displays the tool life information,
A step of displaying in real time at least one of a program image displaying the part program or a tool path image obtained by analyzing the part program, converting the part program into tool path data, and displaying the tool path data, When the operator makes an input to specify an arbitrary tool, a step of displaying a correction value input image for the tool specified by the operator on the display, and a step in which the operator inputs and writes a correction value for wear correction And a step of inputting the correction value to a computer of a CNC machine tool when a command is given. 4. The program according to claim 3, wherein after the operator inputs to designate an arbitrary tool,
A program for displaying a tool life information image and a correction value input image regarding a tool designated by an operator together with either or both of a program image and a tool path image on a display. 5. A personal computer that can be connected to a CNC machine tool via a communication line, and a program recorded in a hard disk of the personal computer, wherein the program is recorded in a hard disk of the personal computer.
An input device comprising one of the programs described in. 6. A CNC machine tool comprising the input device according to claim 5 as a CNC machine tool.