JP2001159906A - Nc working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an NC working device capable of efficiently restarting operation even when the abnormality of a tool is detected and executing continuous operation even when the tool abnormality is repeated twice or more. SOLUTION: First and second working program specification data for specifying a working program to be executed next out of working programs stored in a schedule table 31 when the 1st and 2nd tool abnormality events are generated are stored in each working program. When a main shaft abnormality detection circuit 34 detects tool abnormality, an execution control part 35 judges the number of times of the tool abnormality and reads out and executes a working program specified by the 1st working program specification data in the case of the 1st tool abnormality or a working program specified by the 2nd working program specification data in the case of the 2nd tool abnormality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC processing apparatus capable of performing a scheduled operation. More specifically, the present invention relates to an NC processing apparatus that executes a plurality of selected processing programs according to a preset schedule to continuously process a workpiece.

[0002]

2. Description of the Related Art Conventionally, when a schedule operation is performed by an NC machining apparatus, machining program names are entered in a schedule table in the order of execution, and a machining program name to be executed first among machining program names inputted in the schedule table is used. After setting the driving pointer to,
Perform cycle start. Then, a machining program corresponding to the machining program name in which the operation pointer is set is read from the machining program memory, and the machining machine body is controlled based on the machining program. When this machining program ends, the machining program corresponding to the next machining program name is read from the machining program memory, and the machining machine body is controlled based on the machining program. After such operations are repeated, the operation is terminated when there is no machining program name or machining program name in the final schedule.

[0003]

In the above-described conventional schedule operation, for example, during machining of a workpiece,
When an abnormality is detected in a tool by tool breakage detection, cutting abnormality detection, automatic tool length measurement, or the like, machining has been performed again from the beginning after the replacement of the tool by the alternative tool function. Therefore, for a certain workpiece, rough machining (1), tool exchange, rough machining (2), tool exchange,
In the case where the finishing processing is performed in order, if a tool abnormality is detected in the finishing processing, the processing is performed from the first rough processing, resulting in extremely low efficiency.

In addition, when a tool abnormality is detected, if the tool is left on the work (such as being stuck in the work), even if the same process is repeated from the beginning, the tool abnormality will occur at the same place. The frequency of detection is high, and eventually the operation cannot be continued. In particular, when performing a continuous machining operation by setting a plurality of works on one table, for example,
If a tool abnormality is repeatedly detected during the processing of the first work, the subsequent work will not be processed at all, and as a result, a situation will occur in which continuous operation is not executed.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional inconvenience, and to efficiently resume operation even when a tool abnormality is detected, and to provide an NC capable of continuous operation even when a tool abnormality is repeated two or more times. An object of the present invention is to provide a processing device.

[0006]

An NC processing apparatus according to the present invention employs the following configuration to achieve the above object. An NC processing apparatus according to claim 1, a processing machine body that processes a workpiece while relatively moving the workpiece and a tool, a processing program memory storing a plurality of types of processing programs,
A schedule table storing the execution order of the selected machining program, and a machining program corresponding to the execution order of the machining program stored in the schedule table are sequentially read from the machining program memory, and based on the machining program, the processing machine main body is read. The NC processing apparatus includes: an execution control unit for controlling the execution of the machining program by the execution control unit; and a tool abnormality detection unit for detecting an abnormality of the tool when the machining program is executed by the execution control unit. In the execution order of the machining program stored in the schedule table, machining program designation data for designating a machining program to be executed next is stored, and the execution control unit detects a tool abnormality by the tool abnormality detection unit. The current machining program It has been read out and execute the machining program corresponding to the machining program specified data, characterized in that.

According to this configuration, in the schedule operation, the machining programs corresponding to the execution order of the machining programs stored in the schedule table are sequentially read from the machining program memory, and the machining machine body is controlled based on the machining programs. The work is processed. If a tool error occurs during this machining, the machining program to be executed next is designated from the machining programs stored in the schedule table by the machining program designation data stored in the machining program executing the machining. Processing is performed according to the processing program. Therefore, since a machining program to be executed next when a tool error occurs can be arbitrarily specified, the operation can be efficiently restarted even if a tool error is detected. For example, when performing rough machining (1), tool exchange, rough machining (2), tool exchange, and finish machining in order for one workpiece, machining that designates a tool exchange machining program as a machining program for performing finish machining is performed. By storing the program designation data, after restarting from a tool error,
This can be done from a tool change machining program. Therefore, unlike the related art, the same program does not have to be executed from the beginning, and the operation can be efficiently restarted. Also, 1
Even when performing a continuous machining operation by setting a plurality of workpieces on one table, if the machining program for machining a certain workpiece stores machining program designation data that specifies the machining program for machining the next workpiece, Even if a tool abnormality occurs during the processing of a certain work, it is possible to fly to the next work and perform continuous processing. In other words, the work currently being processed can be stopped as a defective product and the processing can be continued from the next work.

According to a second aspect of the present invention, in the NC machining apparatus according to the first aspect, each of the machining programs includes the schedule when the first tool abnormality occurs during execution of the machining program. First machining program designating data for designating a machining program to be executed next from the execution order of the machining programs stored in the table, and the schedule table when a second tool error occurs during execution of the same machining program. And the second machining program designating data for designating a machining program to be executed next from the execution sequence of the machining program stored in the execution control means. The execution control means detects that a tool abnormality has been detected by the tool abnormality detection means. At this time, the number of the tool abnormality is determined, and when the tool abnormality is the first time, it is stored in the machining program being executed. With reading and executing a corresponding machining program 1 machining program designation data,
In the case of a second tool abnormality, a machining program corresponding to the second machining program designation data stored in the machining program being executed is read and executed.

According to this configuration, if a tool error occurs during execution of a certain machining program, it is determined what number of tool errors has occurred. At the time of the first tool abnormality, a machining program corresponding to the first machining program designation data stored in the machining program being executed is read, and machining is performed according to the machining program. At the time of the second tool abnormality, a machining program corresponding to the second machining program designation data stored in the currently executed machining program is read, and machining is performed according to the machining program. Therefore, if the first machining program designation data and the second machining program designation data are set as different data, the machining program which is restarted when the tool abnormality occurs for the first time and the machining program which restarts when the tool abnormality occurs for the second time Since the machining program to be restarted can be changed, the schedule to be restarted can be changed according to the number of tool abnormalities.

According to a third aspect of the present invention, there is provided the NC machining apparatus according to the second aspect, wherein a first machining program of a currently executed work is stored as the first machining program designation data, and the second machining is performed. A head machining program of a work to be executed next is stored as program designation data. According to this configuration,
In the case of the first tool abnormality, the leading machining program of the currently executing work is read out, and machining is performed according to the machining program. At the time of the second tool abnormality, the leading machining program of the work to be executed next is read out, and machining is performed according to the machining program. Therefore, when the first tool abnormality occurs, the same machining program is executed again for the same work. However, when the second tool abnormality occurs, machining is performed for the next work. Even when a plurality of workpieces are set in a continuous machining operation and a tool error occurs on the way, it is possible to fly to the next workpiece and perform continuous machining.

According to a fourth aspect of the present invention, in the NC machining apparatus according to any one of the first to third aspects, the execution control means detects a tool abnormality by the tool abnormality detection means. At this time, the processing machine body is returned to the home position. According to this configuration, when a tool abnormality is detected, first, the processing machine main body is returned to the home position, and the next specified processing program is executed from this state. The transition to the program can be performed smoothly.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an NC processing apparatus according to the present embodiment. The NC processing apparatus includes a processing machine body 10 that relatively moves a work and a tool in a three-dimensional direction (X, Y, and Z axis directions) to process the work, and a host computer 20.
, An NC device 30, and a sequencer 40.

The processing machine body 10 includes a table 11, a portal frame 12 movably provided in the front-rear direction (Y-axis direction) of the table 1, and left and right along a horizontal beam 12 A of the portal frame 12. A saddle 13 movably provided in a direction (X-axis direction), and a lifting block 14 provided on the saddle 13 movably in a vertical direction (Z-axis direction).
And a main shaft 15 rotatably provided on the lifting block 14. A tool 16 is attached to the main shaft 15 via a tool holder (not shown).
An operation panel 18 having a display screen 17 is provided near the processing machine body 10.

The host computer 20 has a machining program memory 21. The machining program memory 21 stores a plurality of types of machining programs. As shown in FIG. 2, in each machining program, machining program designation data 22 and 23 for designating a machining program to be executed next when a tool error occurs are stored at the beginning of the program. Specifically, when a first tool error occurs during execution of the machining program, first machining program designation data 22 for designating a machining program to be executed next
And second machining program designation data 23 for designating a machining program to be executed next when a second tool abnormality occurs during execution of the same machining program.
The machining program specified by the machining program designation data 22 and 23 is selected from the execution order of the machining programs stored in the schedule table 31 described later.

The NC device 30 includes a schedule table 31 in which machining program names (file names) of the selected machining programs are stored in order according to the execution order, and the host computer corresponding to the machining program names stored in the schedule table 31. A machining program storage memory 32 for storing a machining program read from the machining program memory 21 of the computer 20, and a memory for storing and executing the machining program stored in the machining program storage memory 32 for controlling the machining machine body 10. An execution buffer 33, a spindle abnormality detection circuit 34 as a tool abnormality detection means for detecting a tool abnormality of the processing machine main body 10 when a machining program is executed, and an execution control unit 35 having a macro program for controlling these. I have. Note that the spindle abnormality detection circuit 34 detects a tool abnormality from the current value of the motor that drives the spindle 15, but is not limited thereto.

The sequencer 40 has a macro program interrupt circuit 41 for giving an interrupt command to the execution control unit 35 based on an abnormality detection signal from the spindle abnormality detection circuit 34 of the NC unit 30. Accordingly, when the spindle abnormality detection circuit 34 detects a tool abnormality, the execution control unit 35 determines the number of the tool abnormality. At the time of the first tool abnormality, a machining program corresponding to the first machining program designation data 22 stored in the machining program being executed is read from the machining program memory 21 and executed. At the time of the second tool abnormality, a machining program corresponding to the second machining program designation data 23 stored in the machining program being executed is read from the machining program memory 21 and executed.

In such a configuration, as shown in FIG. 3, it is assumed that a plurality of (four) workpieces NO1 to NO4 are set in one table 51 to perform a continuous machining operation. First, on the operation panel 18, a program name (file name) shown in FIG. For the first work NO1, machining program names ABC, DEF, and GHI are input in the order of machining.
For the next work NO2, the machining program name JKL,
Input MNO and PQ. For the next work NO3,
Input the machining program names RS and TU. Last work
For NO4, the machining program name VW, XYX is input. Then, it is displayed on the display screen 17 as shown in FIG.

Here, when the cycle starts (cycle start of the schedule operation), the machining programs corresponding to the machining program names stored in the schedule table 31 are sequentially read from the machining program memory 21 of the host computer 20 and stored. After being stored in the memory 32, the processing machine main body 10 is controlled through the execution buffer 33. That is, the processing machine main body 10 is controlled based on the processing program stored in the processing program storage memory 32. If a tool error occurs during this machining, the machining program to be executed next from the machining programs stored in the schedule table 31 by the machining program designation data 22 and 23 stored in the machining program executing the machining. A program is designated, and machining is executed according to the machining program.

That is, as shown in the flowchart of FIG. 6, when a tool abnormality occurs, the tool is first moved to the home position, and then the tool is replaced. Subsequently, it is determined what number of times the tool is abnormal. First tool error (C =
In the case of 0), after the leading machining program of the currently executed work (for example, program name: file name ABC specified by V100 = 1 shown in FIG. 2) is read out,
The process of C = 1 is performed. Therefore, when a tool abnormality occurs for the first time, the same machining program is executed again for the same work. In the second time, when the tool is abnormal (C = 2), the leading machining program of the work to be executed next (for example, the program name designated by V101 = 4 shown in FIG. 2: file name JKL) is read out. , C =
0 processing is performed. Therefore, when a tool abnormality occurs for the second time, machining is performed on the next work,
Even when a plurality of workpieces are set on one table to perform a continuous machining operation, the workpieces can be machined continuously even if a tool error occurs in the middle.

When one work is set on one table and processing is performed, for example, as shown in FIG.
When one workpiece NO5 is set and processed in one table 51, as shown in FIG. 8, the rough processing (1), the tool exchange, the rough processing (2), the tool exchange, and the finishing are performed in the schedule table 31. Enter the name of the machining program ARA1, T1, ARA2, T2, SIAGE for machining. Here, FIG.
As shown in the figure, at the beginning of a machining program for performing finishing machining (machining program name SIAGE), machining program designation data 22 (V
If 100 = 4) is stored, it can be performed from the tool change program (file name T2) after restarting from a tool abnormality. Therefore, unlike the related art, the same program does not have to be executed from the beginning, and the operation can be efficiently restarted.

Therefore, according to the present embodiment, if a tool error occurs during the machining of the schedule operation, the schedule table 31 is used by the machining program designation data 22 and 23 stored in the machining program executing the machining. Is selected from among the machining programs stored in the program, and the machining is executed according to the machining program. That is, the machining program to be executed next when a tool error occurs is arbitrarily designated. Therefore, even if a tool abnormality is detected, the operation can be efficiently restarted.

If a tool error occurs during machining, the number of the tool error is determined. If the first tool error occurs, the first machining program designation data 22 stored in the machining program being executed is determined. Is read, and machining is performed in accordance with the machining program. When a second tool abnormality occurs, the machining program corresponding to the second machining program designation data 23 stored in the machining program being executed is It is read out and processed according to this processing program. Therefore, if the first machining program designation data and the second machining program designation data are set as different data, the machining program which is restarted when the tool abnormality occurs for the first time and the machining program which restarts when the tool abnormality occurs for the second time Since the machining program to be restarted can be changed, the schedule to be restarted can be changed according to the number of tool abnormalities.

In particular, the first machining program designation data 2
As the second, the head machining program of the currently executing work is
Since the first machining program of the work to be executed next is stored as the second machining program designation data 23, in the case of the first tool abnormality, the first machining program of the currently executed work is read out. In the case of the second tool abnormality,
Next, the leading machining program of the work to be executed is read out, and machining is performed according to the machining program. Therefore, when the first tool error occurs, the same machining program is executed again for the same work. However, when the second tool error occurs, machining is performed for the next work. Even when a plurality of workpieces are set in a continuous machining operation, the workpieces can be machined continuously even if a tool error occurs on the way.

When a tool abnormality is detected, the machine body 10 is returned to the home position, and the next designated machining program is executed from this state. Migration can be done smoothly.

In the above embodiment, a plurality of types of machining programs are stored in the machining program memory 21 of the host computer 20, but the present invention is not limited to this.
You may make it memorize | store in a workstation or a personal computer. In the above-described embodiment, the spindle abnormality detection circuit 34 is provided as the tool abnormality detection means. However, the present invention is not limited to this, and a tool abnormality may be detected by automatic tool length measurement or the like.

[0026]

According to the NC machining apparatus of the present invention, if a tool error occurs during machining of a workpiece, the NC table is stored in the schedule table by the machining program designation data stored in the machining program executing the machining. Since the machining program to be executed next is specified from the executed machining programs and machining is executed according to this machining program, that is, it is possible to arbitrarily designate the machining program to be executed next when a tool error occurs. Because you can
The operation can be efficiently restarted even if a tool abnormality is detected, and continuous operation can be performed even when the tool abnormality is repeated two or more times.

[Brief description of the drawings]

FIG. 1 is an overall block diagram showing an embodiment of an NC processing apparatus according to the present invention.

FIG. 2 is a diagram showing an example of a machining program according to the embodiment.

FIG. 3 is a diagram showing a table and a plurality of works set thereon according to the embodiment;

FIG. 4 is a view showing a schedule table when processing a plurality of workpieces shown in FIG. 3;

5 is a diagram showing a screen on which a machining program name registered in the schedule table shown in FIG. 4 is displayed.

FIG. 6 is a diagram showing a processing flow when a tool abnormality is detected in the embodiment.

FIG. 7 is a diagram showing the table and one work set on the table according to the embodiment.

8 is a diagram showing a schedule table when processing the work shown in FIG. 7;

9 is a diagram showing one machining program among the machining program names shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 processing machine body 16 tool 20 host computer 21 processing program memory 30 NC device 31 schedule table 32 processing program storage memory 34 spindle error detection circuit (tool error detection means) 35 execution control unit 40 sequencer

Claims (4)

[Claims] A processing machine for processing the workpiece while the workpiece and the tool are relatively moved; a processing program memory storing a plurality of types of processing programs; a schedule table storing an execution order of the selected processing programs; Execution control means for sequentially reading out the machining programs corresponding to the execution order of the machining programs stored in the schedule table from the machining program memory, and controlling the processing machine main body based on the machining programs; NC comprising tool abnormality detecting means for detecting an abnormality of the tool during execution of a program
In the machining apparatus, each of the machining programs stores machining program designating data for designating a machining program to be executed next from an execution order of the machining programs stored in the schedule table when a tool abnormality occurs, NC processing, wherein when the tool abnormality detecting means detects a tool abnormality, the execution control means reads and executes a machining program corresponding to machining program designation data stored in the machining program being executed. apparatus. 2. The NC machining apparatus according to claim 1, wherein each of the machining programs includes executing a machining program stored in the schedule table when a first tool error occurs during execution of the machining program. First machining program designation data for designating a machining program to be executed next from the sequence, and an execution sequence of the machining program stored in the schedule table when a second tool error occurs during execution of the same machining program And the second machining program designating data for designating a machining program to be executed next from among the above. The execution control means determines the number of times of the tool abnormality when the tool abnormality is detected by the tool abnormality detection means. Judgment is made, and in the case of the first tool abnormality, the first machining program designation data stored in the machining program being executed is added. A corresponding machining program is read and executed, and in the case of a second tool abnormality, a machining program corresponding to the second machining program designation data stored in the currently executed machining program is read and executed. NC processing equipment. 3. The NC machining apparatus according to claim 2, wherein a first machining program of a currently executed work is stored as the first machining program designation data, and a work to be executed next as the second machining program designation data. An NC machining apparatus, wherein a leading machining program is stored. 4. The NC processing apparatus according to claim 1, wherein the execution control unit moves the main body of the processing machine to a home position when a tool abnormality is detected by the tool abnormality detection unit. An NC processing apparatus characterized by returning.