JP2001014012A - Numerical controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical controller with such a structure that can temporary stop machining operation at a position where lowering of machining accuracy can be avoided by specifying an error block found after execution of a machining program is started in its early stages. SOLUTION: This numerical controller is provided with an analysis processing part 1 to output analysis error block data about analysis error block in which an error is found before an analysis error block is executed when the error is found in a block under analysis, an execution processing part 2 to successively execute the machining program for every block based on an analyzed result outputted from the analysis processing part 1, a block display part 3 to display the block under analysis based on the analysis block data and an error display part 4 to display the analysis error block based on the analysis error block data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a numerical control device.

[0002]

2. Description of the Related Art A machining program executed in a numerical controller for controlling the operation of a machining apparatus is constituted by combining a plurality of blocks for instructing various settings for executing a predetermined machining operation. The execution of the machining program in the numerical control device is performed based on an analysis result obtained by sequentially analyzing each block constituting the machining program for each block.

FIG. 6 is an explanatory diagram schematically showing a program path and a tool path in two machining operations.

FIG. 6A shows a first example, in which a program path R1 and a tool path R2 are shown. The program path R1 is a trajectory of a processing point of the processing target, and is composed of partial paths Xa, Ya, and Za. Tool path R2
Is the trajectory of the tool axis, and the partial paths xa, ya, za
It is composed of Program path R1 and tool path R
2 is separated by a fixed interval because the tool diameter correction processing is performed in consideration of the tool diameter. FIG.
The machining program for controlling the machining operation shown in FIG.
A block for instructing a machining operation on the partial path xa;
A block for instructing a machining operation in the partial path ya;
It is controlled in combination with a block that instructs a machining operation on the partial path za.

FIG. 6B shows a second example, in which a program path R1 and a tool path R2 are shown. The program path R1 is composed of partial paths Xb, Yb, Zb. The tool path R2 is composed of partial paths xb, yb, zb. The machining program for controlling the machining operation shown in FIG. 6B instructs the machining operation on the partial path xb, the block for instructing the machining operation on the partial path yb, and the machining operation on the partial path zb. It is controlled in combination with a block.

FIG. 7 is a block diagram showing a configuration of a conventional numerical controller.

The conventional numerical control device shown in FIG. 7 is an analysis processing unit 1 for sequentially analyzing a machining program composed of a plurality of blocks for each block and outputting an analysis result, and an output from the analysis processing unit 1. Executes the machining operation of the machining apparatus based on the analysis result of the machining program, and outputs execution block data for the block being executed of the machining program. An execution processing unit 2 that outputs error block data, a block display unit 3 that displays a block in execution of a machining program based on the execution block data output from the execution processing unit 2, and an error block data output from the execution processing unit And an error display section 4 for displaying an error block of the machining program based on the Cage, the analysis processing unit 1 executes processing unit 2
The execution processing unit 2 is connected to the block display unit 3 and the error display unit 4.

The analysis processing unit 1 sequentially analyzes a machining program to be executed for each block, and outputs the analysis result to the execution processing unit 2.

An execution processing unit 2 executes a machining operation such as axis movement of a machining apparatus based on an analysis result of the machining program output from the analysis processing unit 1 and executes execution block data of a block in execution of the machining program. Output to the block display unit 3. When an error occurs in a block during execution of the machining program, error block data for the block in which the error has occurred is output to the error display unit 4.

[0010] The block display section 3 displays a block under execution of the machining program based on the execution block data output from the execution processing section 2.

The error display unit 4 displays an error block of the machining program based on the error block data output from the execution processing unit 2.

Before the execution of the machining program, the presence or absence of an error is checked using a grammar check function of the numerical controller.

[0013]

However, even if the presence or absence of an error is checked in advance before the execution of the machining program, an error may occur due to various correction data and the state of the machining apparatus when actually executing the machining operation. May occur. For example, in a normal processing device and a numerical control device,
If a tool breaks or fails during a machining operation, the tool is automatically replaced with another alternative tool, but the alternative tool and the original tool have different diameters or lengths In this case, even if the tool diameter correction processing or the tool length correction processing is performed on the processing program, all the subsequent processing may not be performed without any trouble.

FIG. 8 is an explanatory diagram schematically showing a program path, a tool path on a program, and an alternative tool path in an example of a machining operation.

In the example shown in FIG.
1, a tool path R2 on the program and an alternative tool path R3 are shown. The program path R1 is a trajectory of a processing point of the processing target, and includes partial paths A1, B1, C1, D1,
E1. Tool path R2 on the program
Is the locus of the axis of the tool on the program that should be used on the program, and the partial paths A2, B2, C2, D
2, E2. The alternative tool path R3 is the trajectory of the axis of the alternative tool, and A3, B3, C3, D3, E
3 is comprised.

The reason why the program path R1 and the program tool path R2 are separated from each other by a predetermined interval is that a tool diameter correction process is performed in consideration of the tool diameter on the program. In addition, the program path R1 and the alternative tool path R3
The reason why are separated by a larger constant interval is that the tool diameter correction processing is performed in consideration of the alternative tool diameter larger than the tool diameter in the program.

When the tool on the program is used from the beginning to the end of the machining operation, the tool axis on the program is operated along the tool path R2 on the program,
The processing object can be processed along the program path R1.

However, when the tool is replaced with a substitute tool due to breakage or failure of the program on the program after the start of the machining operation, the substitute tool and the original program tool usually have different diameters or lengths. ing. Here, it is assumed that the tool diameters are different as described above, and the alternative tool diameter is larger. When the tool is replaced with a substitute tool having a larger diameter, as shown in FIG. 8, it is necessary to perform a tool diameter correction process for increasing the interval between the program path R1 and the alternative tool path R3.

However, even though the tool diameter correction processing is performed, there is a case where subsequent processing cannot be performed normally. For example, in the example of FIG. 8, at the end position X of the partial path C3, the alternative tool approaches the partial path E1 of the program path R1 too much and causes interference, and the alternative tool contacts the part of the partial path E1 of the workpiece. Unnecessary cuts occur. Since such an error in the machining operation is caused by a tool change after the execution of the machining program, it cannot be found by checking before the execution of the machining program.

In the conventional numerical controller shown in FIG. 7, even if an error in the machining operation as described above is found by the analysis in the analysis processing unit 1, the execution processing unit 2 includes an error block including the error. Unless was executed, it was not possible to identify the presence or absence of an error.

Therefore, the machining operation is stopped when the error block enters the execution state in the execution processing unit 2. However, important positions in machining, such as the position where the tool and the object to be machined are in contact with each other. Even in the case of, the machining operation is stopped at that position, so that machining accuracy may be reduced.

In the example shown in FIG. 8, an error in the machining operation occurs at the end position X of the partial path C3. Therefore, when the block for controlling the operation of the partial path C3 is in the execution state, it is determined that the error exists. The identification is performed and the processing operation is stopped. Therefore, the stop position is, for example, the start position Y of the partial route C3. That is, in the conventional numerical controller,
Since the machining operation of the machining device is stopped at a position where the tool and the workpiece are in contact with each other, machining accuracy may be reduced.

A plurality of blocks constituting the machining program are sequentially analyzed by the analysis processing unit 1,
Since the data is sequentially input to the execution processing unit 2 and becomes an execution state, if an error occurs in any of the blocks of the machining program configured by combining a plurality of blocks and the machining operation is stopped, the error is generated. The block that occurred,
In some cases, the block in which the machining operation has been stopped does not match, and it has been difficult in some cases to determine which block has an error.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to identify an error block found after the execution of a machining program for controlling the operation of a machining apparatus at an early stage to reduce machining accuracy. It is an object of the present invention to provide a numerical control device having a configuration capable of temporarily suspending a machining operation at a position where avoidance can be achieved.

[0025]

According to a numerical control device of the present invention, a machining program composed of a plurality of blocks is sequentially analyzed for each block, analysis block data for a block being analyzed is output, and an analysis result is obtained. If an error is detected in the block being analyzed, an analysis processing unit that outputs analysis error block data of the analysis error block in which the error is detected before the analysis error block is executed; An execution processing unit that sequentially executes a machining program for each block based on an analysis result output from the processing unit and outputs execution block data of a block being executed of the machining program, and displays an execution block based on the execution block data. And display the block being analyzed based on the analysis block data A lock display unit, and an error display unit that displays the block being executed based on the execution block data and displays an analysis error block based on the analysis error block data are provided. Error blocks found after the execution of the machining program that controls the machining can be identified early, and the machining operation can be temporarily stopped at a position where a decrease in machining accuracy can be avoided.

As a more practical configuration, a machining program composed of a plurality of blocks is sequentially analyzed for each block, analysis block data for the block being analyzed is output, and an analysis result is output. When the analysis error block is found, the analysis processing unit outputs the analysis error block data of the analysis error block in which the error is detected before the analysis error block is executed, and the analysis result output from the analysis processing unit. In addition to executing the machining program sequentially for each block, outputs the execution block data for the currently executing block of the machining program. If an error occurs in the currently executing block, the execution error for the execution error block in which the error occurred An execution processing unit that outputs block data and an execution block data A block display unit for displaying the block being executed based on the analysis block data and displaying the block being analyzed based on the analysis block data, and displaying the block being executed based on the execution block data, and displaying the analysis error block based on the analysis error block data. And an error display unit for displaying the execution error block based on the execution error block data.

When displaying an analysis error block or an execution error block, the error display section may additionally or separately display information on the error. The error display unit may be provided integrally with the analysis processing unit, the execution processing unit, and the block display unit, or may be provided separately from the analysis processing unit, the execution processing unit, and the block display unit.

When the analysis processing block outputs the analysis error block data, the execution of the machining program by the execution processing section may be stopped.

The stop block of the machining program for stopping the execution of the machining program by the execution processing section may be designated in advance.

The stop block is preferably a block in which the tool of the processing apparatus to be controlled is not in contact with the workpiece.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a numerical controller according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a numerical controller according to the present invention.

The numerical controller according to the present invention shown in FIG. 1 sequentially analyzes a machining program composed of a plurality of blocks for each block, outputs analysis block data for the block being analyzed, and outputs an analysis result. ,
When an error is found in the block being analyzed, an analysis processing unit 1 that outputs analysis error block data of the analysis error block in which the error is found before the analysis error block is executed, and an analysis processing unit 1 Executes the machining program for each block sequentially based on the analysis result of the machining program output from, outputs the execution block data for the executing block of the machining program, and outputs an error if an error occurs in the executing block. An execution processing unit 2 that outputs execution error block data for the execution error block where the error has occurred, and a block in execution of the machining program is displayed based on the execution block data output from the execution processing unit 2 and the analysis processing unit 1 Analysis of machining program based on output analysis block data Block the display unit 3 for displaying the lock
And displaying the block under execution of the machining program based on the execution block data output from the execution processing unit 2 and displaying the analysis error block of the machining program based on the analysis error block data output from the analysis processing unit 1. Further, it comprises an error display unit 4 for displaying an execution error block of the machining program based on the execution error block data output from the execution processing unit 2. The analysis processing unit 1 is connected to the execution processing unit 2, the block display unit 3 and the error display unit 4, and the execution processing unit 2 is connected to the block display unit 3 and the error display unit 4.

The analysis processing section 1 sequentially analyzes a machining program composed of a plurality of blocks for each block, outputs analysis block data of the block being analyzed to the block display section 3, and executes the analysis result. 2 is output. Here, if an error is found in the block being analyzed, the analysis error block data for the analysis error block in which the error was found is output to the error display unit 4 before the analysis error block is executed. I do. In order to perform such processing, the analysis processing unit 1 sequentially performs the analysis for each block several blocks ahead of the executing block in the execution state in the execution processing unit 2.

The execution processing unit 2 sequentially executes the machining program for each block based on the analysis result of the machining program output from the analysis processing unit 1. That is, a processing operation such as axis movement of the processing apparatus to be controlled is executed. In addition, execution block data for the block in execution of the machining program is output to the block display unit 3 and the error display unit 4. When an error occurs in the block being executed, the execution error block data for the execution error block in which the error occurred is output to the error display unit 4.

The block display unit 3 displays a block under execution of the machining program based on the execution block data output from the execution processing unit 2. Further, based on the analysis block data output from the analysis processing unit 1, the block under analysis of the machining program is displayed.

The error display unit 4 displays a block under execution of the machining program based on the execution block data output from the execution processing unit 2. In addition, based on the analysis error block data output from the analysis processing unit 1, an analysis error block of the machining program is displayed. Further, an execution error block of the machining program is displayed based on the execution error block data output from the execution processing unit 2.
When an analysis error block or an execution error block is displayed, information such as the content of the error may be additionally or separately displayed.

The error display section 4 may be provided integrally with the numerical control device, or may be provided at a remote place such as a place where an operator is waiting. Further, the plurality of error display units 4 may be provided integrally with the numerical control device, and may be provided at separate locations. The error display provided at a remote location may be a simple means simply indicating that an error has been found or has occurred.

FIG. 2 is an explanatory diagram showing an example of the machining program.

As shown in FIG. 2, the processing program is generally composed of a plurality of blocks for instructing various settings for the processing operation of the processing apparatus.

FIG. 3 is an explanatory diagram showing a display example on the block display section 3.

As shown in FIG. 3, the block display unit 3
In, based on the execution block data output from the execution processing unit 2, the block under execution of the machining program is indicated by a symbol “>”. Also, based on the analysis block data output from the analysis processing unit 1, the block under analysis of the machining program is indicated by a symbol “>>”. By performing such a display, it is clear which block is being analyzed and which block is being executed, and it is possible to grasp immediately.

FIG. 4 is an explanatory diagram showing a display example on the error display section 4.

As shown in FIG. 4, in the error display section 4, the block under execution of the machining program is indicated by a symbol ">" based on the execution block data output from the execution processing section 2. Further, based on the analysis error block data output from the analysis processing unit 1, the analysis error block of the machining program is indicated by a symbol “**”. Further, when an error occurs in the currently executing block, the execution error block of the machining program may be displayed with a symbol different from the analysis error block based on the execution error block data output from the execution processing unit 2. it can. By performing such a display, it is clear which block has an error, which block is being executed, and which block has an error, and it is possible to grasp immediately.

FIG. 5 is an explanatory diagram showing an example of an additional display on the error display section 4.

When an error is found by the analysis in the analysis processing unit 1, if an error has occurred during the execution in the execution processing unit 2, as shown in FIG. In addition to indicating whether an error has occurred in the block, and additionally or separately indicating the nature of the error, as shown in FIG. Response is possible.

As described above, in the analysis processing unit 2 of the numerical controller according to the present invention, the execution processing unit 2 sequentially analyzes each block several blocks ahead of the currently executing block in the execution state. I have. Therefore, when an error is present in any of the blocks, the analysis error block can be specified at a point several blocks before the block enters the execution state. In addition, the analysis process and the execution process can be temporarily stopped to deal with the error.

Here, when the execution process is temporarily stopped,
If the execution process is paused in a block that is important for the processing operation, such as when the tool of the processing device is in contact with the processing target, the processing accuracy will not increase even if the processing operation is resumed after addressing the error. It may cause a decrease. Therefore, in the numerical control device according to the present invention, the execution process is temporarily performed in a safe block between the analysis error block and the executing block, that is, a block in which the tool of the processing device and the workpiece are in a non-contact state. Stop. As a result, it is possible to avoid a decrease in the processing accuracy due to the suspension of the execution processing.

The stop block for temporarily suspending the execution processing is, for example, the block closest to the analysis error block between the analysis error block and the currently executing block. The execution process may be paused manually according to the display of the analysis error block, or may be automatically performed according to the output of the analysis error block data. When the execution process is to be automatically paused, a stop block that can be safely paused is specified in advance in the machining program, and when the analysis error block data is output, the analysis error block is output. The execution processing is automatically paused at the stop block closest to the analysis error block between and.

Referring to the example shown in FIG.
In the numerical control device according to the present invention, it is found that an error in the machining operation occurs at the end position X of No. 3 in the numerical control device according to the present invention. The execution process of the machining operation is temporarily stopped between the position of the block in the state, for example, the end position of the partial path A3 and the start position of the partial path B3. By such a temporary stop process, it is possible to avoid a decrease in processing accuracy.

[0051]

According to the numerical controller according to the present invention, a machining program composed of a plurality of blocks is sequentially analyzed for each block, and analysis block data for a block under analysis is output, and an analysis result is output. If an error is found in the block being analyzed, an analysis processing unit that outputs analysis error block data for the analysis error block in which the error was found before the analysis error block is executed, and an output from the analysis processing unit An execution processing unit for sequentially executing the machining program for each block based on the analyzed result, and outputting execution block data for the currently executing block of the machining program, and displaying the execution block based on the execution block data, and performing analysis. Block display section that displays blocks being analyzed based on block data And an error display unit for displaying the block being executed based on the execution block data and for displaying the analysis error block based on the analysis error block data. The specified error block can be specified early, and the processing operation can be temporarily stopped at a position where the reduction in processing accuracy can be avoided, so that an appropriate and prompt response to the error can be taken.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a numerical control device according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a machining program.

FIG. 3 is an explanatory diagram showing a display example on a block display unit.

FIG. 4 is an explanatory diagram showing a display example on an error display unit.

FIG. 5 is an explanatory diagram showing an example of an additional display on an error display unit.

FIG. 6 is an explanatory view schematically showing a program path and a tool path in two machining operations.

FIG. 7 is a block diagram showing a configuration of a conventional numerical control device.

FIG. 8 is an explanatory view schematically showing a program path, a tool path on a program, and an alternative tool path in an example of a machining operation.

[Explanation of symbols]

 Reference Signs List 1 analysis processing unit 2 execution processing unit 3 block display unit 4 error display unit R1 program path R2 tool path on program R3 alternative tool path

Claims (7)

[Claims] 1. When a machining program composed of a plurality of blocks is sequentially analyzed for each block, analysis block data for the block being analyzed is output and an analysis result is output, and an error is found in the block being analyzed. An analysis processing unit that outputs analysis error block data about an analysis error block in which an error is found, before the analysis error block is executed, and based on the analysis result output from the analysis processing unit. An execution processing unit that sequentially executes the machining program for each block, and outputs execution block data for an execution block of the machining program; and displaying the execution block based on the execution block data, and displaying the analysis block data. Block displaying the block under analysis based on And radical 113, and displays the running block based on the execution block data, numerical control apparatus characterized by comprising a an error display section for displaying the analysis error blocks based on the analysis error block data. 2. When a machining program composed of a plurality of blocks is sequentially analyzed for each block, analysis block data for the block being analyzed is output and an analysis result is output, and an error is found in the block being analyzed. An analysis processing unit that outputs analysis error block data about an analysis error block in which an error is found, before the analysis error block is executed, and based on the analysis result output from the analysis processing unit. The machining program is sequentially executed for each block, and execution block data for the currently executing block of the machining program is output. If an error occurs in the currently executed block, the execution for the execution error block in which the error has occurred is executed. An execution processing unit that outputs error block data; A block display unit for displaying the block under execution based on the block data, and displaying the block under analysis based on the analysis block data; and displaying the block under execution based on the execution block data, and displaying the analysis error block data. An error display unit for displaying the analysis error block based on the error error block and displaying the execution error block based on the execution error block data. 3. The error display section, when displaying the analysis error block or the execution error block,
3. The numerical control device according to claim 1, wherein information about the error is additionally or separately displayed. 4. The error display unit is integrated with the analysis processing unit, the execution processing unit, and the block display unit, or
4. The numerical control device according to claim 1, wherein the numerical control device is provided apart from the analysis processing unit, the execution processing unit, and the block display unit. 5. 5. The method according to claim 1, wherein when the analysis error block data is output from the analysis processing unit, the execution of the machining program by the execution processing unit is stopped. Numerical control device as described. 6. The numerical control device according to claim 5, wherein a stop block of the machining program for stopping the execution of the machining program by the execution processing unit is specified in advance. 7. The numerical control device according to claim 6, wherein the stop block is a block in which a tool of a processing device to be controlled is not in contact with a workpiece.