JPS63143605A - Numerical controller having preprocessing function for block data - Google Patents

Abstract

PURPOSE:To prevent the generation of a suspending state in a working machine controlled by a numerical controller and to attain continuous operation by previously executing the preprocessing of all block data specified by a repeating function prior to program operation and storing the reprocessed data in a repeating function preprocessing data memory area of a memory. CONSTITUTION:A repeating function specification block data preprocessing means 72 executes the reprocessing of all block data specified by the repeating function prior to program operation and a repeating function preprocessing data memory area 83 stores preprocessed data. When the block data to be preprocessed at the time of program operation are not the block data specified by the repeating function, a block data preprocessing means 71 executes the preprocessing of the block data and a preprocessed data storing area 82 stores the data preprocessed by the means 71. Consequently, the generation of a suspending state in a working machine or the like to be controlled can be prevented and continuous operation can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerical control device having a block data preprocessing function, and more particularly to a numerical control device having a block data preprocessing function for controlling a machine tool or the like.

[Conventional technology]

Conventionally, in numerical control devices that have this kind of block data preprocessing function, a block that is several blocks ahead of the currently operating block (component of the operation program that is input to the numerical control device to control the machine tool; the same applies hereinafter) Pre-processing of block data up to (processing to convert block data of blocks subsequent to the block to be executed during program operation into information that can be processed by an interpolator, etc.)
I just couldn't do it.

Therefore, if there are many consecutive blocks in which the operating time of the machine tool corresponding to one block is shorter than the preprocessing time of the block data of one block (in this case, in the operation program, consecutive blocks with the same content are (often specified by the repeat function), the preprocessing data stored in memory runs out and the machine tool operation corresponding to that block waits until the preprocessing of a certain block data is completed. I was worried.

FIG. 3 is a flowchart showing block data preprocessing in an example of a conventional numerical control device having a block data preprocessing function.

In the preprocessing of block data in this numerical control device, first, block data in the operating program stored in the memory is sequentially read out (step 31).

Preprocessing is performed on the read block data (
Step 32), the preprocessed data that is the result of the preprocessing is stored in the preprocessed data memory area in the memory (
Step 33).

When the preprocessing of one block data is completed, it is determined whether the next block data still exists in the operation program (step 34), and if the next block data exists, control returns to the process of step 31, and if the next block data does not exist. If so, the process ends.

[Problem that the invention seeks to solve]

In the above-mentioned conventional numerical control device having a block data preprocessing function, when program operation of a large number of blocks is performed continuously in small increments with an operation time shorter than the preprocessing time, the preprocessing data memory area in the memory is used. Since the preprocessing data stored in the block will be lost, the machine tool, which is controlled by the difference between the preprocessing time of a certain block and the operation time of the immediately preceding block, will be in a standstill state.

For example, if the machine tool to be controlled is a grinding machine,
This resting state causes the disadvantage that streak-like scratches appear on the machined surface of the workpiece ground by the grindstone.

In view of the above-mentioned points, it is an object of the present invention to provide a program to operate the block data specified by the repeat function when performing continuous operation of a block whose operation time is shorter than the preprocessing time by specifying the block with the repeat function. By pre-processing all the data beforehand and storing it in a dedicated area called the pre-processing data memory area for repeated functions in the memory, it is possible to prevent the machine tools, etc. to be controlled from being in a sleep state and enable continuous operation. An object of the present invention is to provide a numerical control device having a block data preprocessing function.

[Means for solving problems]

The numerical control device having a block data preprocessing function according to the present invention has a repeat function designated block data preprocessing unit that preprocesses all block data designated by the repeat function before performing a program operation.

a repeat function preprocessing data memory area in which preprocessed data preprocessed by this repeat function designated block data preprocessing means is stored; and a repeat function preprocessing data memory area in which the preprocessed data preprocessed by this repeat function designated block data preprocessing means is stored, and block data to be preprocessed during program operation is stored in the repeat function. Preprocesses the block data when it is not the block data specified by .

a block data preprocessing means; a preprocessing data memory area in which preprocessed data preprocessed by the block data preprocessing means is stored; the repeat function specifying block data preprocessing means; and the block data preprocessing means. When the block data to be executed during program operation is the block data specified by the repeat function, the preprocessing data stored in the preprocessing data memory area for the repeat function is transferred to the interpolation calculator and repeated. and block data program operation processing means for transferring the preprocessing data stored in the preprocessing data memory area to the interpolation calculator when the block data is not specified by the function.

[Effect]

In the numerical control device having the block data preprocessing function of the present invention, the repetition function specified block data preprocessing means preprocesses all the block data specified by the repetition function before performing the program operation. The preprocessing data memory area stores the preprocessing data preprocessed by the block data preprocessing means designated by the repeat function, and the block data to be preprocessed by the block data preprocessing means during program operation is designated by the repeat function. The block data preprocessing means preprocesses the block data when it is not the block data that has been processed, the preprocessing data memory area stores the preprocessing data that has been preprocessed by the block data preprocessing means, and the block data preprocessing means specifies a repeat function. When the block data that the block data program operation processing means with the PRO-7 data preprocessing means attempts to execute during program operation is the block data specified by the repeat function, it is stored in the preprocessing data memory area for the repeat function. The preprocessing data stored in the preprocessing data memory area is transferred to the interpolation calculator when the block data is not specified by the repeat function.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of a numerical control device having a block data preprocessing function according to the present invention, and its numerical control device 1.
2 is a block diagram showing a machine tool 2 controlled by the machine tool 2. FIG. The numerical control device 1 having the block data preprocessing function of this embodiment exchanges information with the operator and the machine tool 2.
an operation unit 3 into which block data (operation program) for performing program operation is input; a brain unit 4 which performs arithmetic processing necessary to control the machine tool 2 based on the input block data; A control unit 5 transmits information such as position and speed necessary for operation of the machine tool 2 to a drive unit 6 based on control information input from the unit 4, and a servo motor (not shown) and a detector (not shown). The drive unit 6 drives the machine tool 2 based on information input from the control unit 5 (also inputs feedback information from the machine tool 2).

When the block data to be executed during program operation is specified by the repeat function, the brain unit 4 uses the preprocessing data stored in the repeat function preprocessing data memory area 83 in the memory 8 with an interpolation calculator. 9 and transfers the preprocessing data stored in the preprocessing data memory area 82 to the interpolation calculator 9 if it is not specified by the repeat function, and the block data program operation processing means 7 necessary for calculation processing. The interpolation calculator 9 includes a memory 8 that stores information, and an interpolation calculator 9 that performs interpolation calculation processing based on preprocessed data and transfers control information to the control unit 5.

The block data program operation processing means 7 includes a block data preprocessing means 71 that performs preprocessing of block data when the block data to be preprocessed during program operation is not the block data specified by the repeat function.
and a repetitive function specified block data preprocessing means 72 that preprocesses all block data specified by the repetitive function before performing the program operation.

The memory 8 includes a block data memory area 81 in which block data constituting an operation program for controlling the machine tool 2 is stored, and a block data memory area 81 in which preprocessed data as a result of processing by the block data preprocessing means 71 is stored. It is configured to include a processing data memory area 82 and a repeating function preprocessing data memory area 83 in which preprocessing data of the processing result of the repeating function designation block data preprocessing means 72 is stored.

Referring to FIG. 2, preprocessing of block data in the numerical control device 1 includes a program determination step 11, a repetitive function existence determination step 12, a repetitive function designation process preprocessing step 13, and a repetitive function preprocessing data save. Step 7 Step 14, next block existence determination step 15, block data reading step 16,
Repetitive function existence determination step 17, block data preprocessing step 18, and preprocessing data save step 19
and a next block existence determination step 20.

Next, the operation of the numerical control device 1 having the block data preprocessing function configured as described above will be explained.

When operating the machine tool 2 under the control of the numerical control device 1, an operating program is first input from the operation unit 3,
Block data constituting this driving program is stored in the block data memory area 81 of the brain section 4.

The brain unit 4 determines whether this operating program is a new operating program or a changed operating program during one operation period (from power-on to power-off) of the numerical control device 1 (step 11).

If this determination indicates that the driving program is a new driving program or a changed driving program, it is determined whether or not the driving program includes a repeat function (step 1).
2).

If it is determined that a repeat function is included, preprocessing of the block data specified by the repeat function is performed by the repeat function specified block data preprocessing means 72 in the block data program operation processing means 7 (step 1).
3) is stored in the repetitive function preprocessing data memory area 83 in the memory 8 (step 14).

Next, it is determined whether the block data designated by the repeat function still exists in the driving program (step 15).

If it is determined that the block data designated by the repeat function exists, the control unit returns to the process of step 13.

If the operation program is not a new operation program or a changed operation program as determined in step 11 (at this time, the preprocessed data of the block data specified by the repeat function is already stored in the memory s), the operation program as determined in step 12 is When the repeat function is not included in the program, or when the block data specified by the repeat function no longer exists in the judgment in step 15, program operation is started and the block data stored in the block data memory area 81 is The block data program is read out by the program operation processing means 7 for processing (step 16).

It is determined whether the read block data is block data indicating a repeat function (step 17).
.

If it is determined in this judgment that the block data is not block data indicating a repetitive function, the block data is preprocessed by the programmer 7 data preprocessing means 71 (step 18).

The preprocessed data obtained through this process is stored in the preprocessed data memory area 82 (step 19).

When this process is completed, block data memory area 8
It is determined whether the next block data still exists in the operation program stored in 1 (step 20).
.

When the program data read out in the judgment of step 17 is block data indicating a repeat function (for this block data, step 13 and step 14
The determination in step 20 is also made for the preprocessing (which has already been preprocessed).

If it is determined that the next block data exists, control returns to step 16.

If it is determined in step 20 that the next block data does not exist, the preprocessing of the block data of the driving program stored in the block data memory area 81 is completed.

Even while the preprocessing is being performed as described above, the program operation of the machine tool 2 is being performed, and if the block data to be executed is the block data specified by the repeat function, the preprocessing for the repeat function is performed. The preprocessing data stored in the data memory area 83 is transferred to the interpolation calculator 9 by the block data program operation processing means 7, and the process is repeated.

However, if the block data is not specified by the function, the preprocessed data stored in the preprocessed data memory area 82 is transferred to the interpolation calculator 9.

In the interpolation calculator 9, interpolation calculation processing is performed on the transferred preprocessed data, and control information as a result of the processing is transferred to the control unit 5.

Based on the control information transferred from the interpolation calculator 9 of the brain section 4, the machine tool 2 is operated under the control of the control section 5 and the driving of the drive section 6.

Next, the operation of the machine tool 2 controlled by the numerical control device 1 as described above is changed to a machine tool (same as the machine tool 2) controlled by a numerical control device having a conventional block data preprocessing function. This will be explained using a time chart in comparison with the operation of .

Here, an explanation will be given taking as an example a case where the machine tool 2 (this operating program assumes a grinding machine) is controlled by an operating program as shown in FIG.

The operation program shown in FIG. 4 has sequence number N30.
This is an operation program in which sequence numbers N30 and N40 are specified in the repeat function G27 of sequence number NIO in order to execute the two blocks N40 and N40 100 times in succession.

It is assumed that the operation time and preprocessing time of the machine tool 2 corresponding to blocks with sequence numbers N30 and N40 are approximately 10 msec and approximately 80 msec, respectively. Further, it is assumed that the time (block transfer time) in which preprocessed data corresponding to one block is transferred to the interpolation calculator 9 is approximately 5 msec.

When this operation program is executed under the control of the numerical control device 1, the preprocessing of the block data of N30 and N40 is completed before the program operation as described above, so the operation time of each block is It will be continuous just by the transfer time (5th
(see figure).

On the other hand, when this operation program is executed under the control of a numerical control device having a conventional block data preprocessing function, the preprocessing time (for example, the block with sequence number N40) of a certain block (for example, the block with sequence number N40) is The machine tool 2 will be in a rest state for about 70 msec, which is the difference between the operation time (about 80 msec) and the operation time of the immediately preceding block with sequence number N30 (about 10 msec).

According to the numerical control device 1 having the block data preprocessing function of this embodiment, this dormant state can be avoided.

〔Effect of the invention〕

As explained above, in the present invention, when a block whose operating time is shorter than the preprocessing time is operated continuously at high speed in small steps by specifying that block with the repeat function, the block data specified by the repeat function is By pre-processing all the data in advance and storing it in the pre-processing data memory area for repeated functions in the memory before starting programmed operation, machine tools controlled by numerical control devices can be prevented from being in a pause state and can be operated continuously. It has the effect of making it possible.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention and a machine tool controlled by a numerical control device having a block data preprocessing function of the embodiment. 3 is a flowchart showing the preprocessing of block data in the numerical control device having the block data preprocessing function of this embodiment. FIG. A flowchart showing the processing; FIG. 4 is a diagram showing an example of an operation program for operating the machine tool shown in FIG. 1; FIG. Figure 4 shows a time chart of the operation of a machine tool that is operated based on the operation program shown in Figure 6. FIG. 3 is a diagram showing a time chart of the operation of the machine tool. In the figure, 1... numerical control device, 2... machine tool, 3... operating section, 4... brain section, 5... control section, 6... drive section, 7... Block data program operation processing means, 8...Memory, 9...Interpolation calculator, 71...Block data preprocessing means, 72...Repetition function specification block data preprocessing means, 81...Block data Memory area, 82... Preprocessing data memory area, 83... Preprocessing data memory area for repeat function.

Claims (1)

[Claims] A repetitive function specified block data preprocessing means for preprocessing all block data specified by the repetitive function before program operation; A preprocessing data memory area for the repeat function in which preprocessed data is stored, and a preprocessing area for preprocessing the block data when the block data to be preprocessed during program operation is not the block data specified by the repeat function. a block data preprocessing means to perform the block data preprocessing; a preprocessing data memory area in which preprocessed data preprocessed by the block data preprocessing means is stored; the repeating function specifying block data preprocessing means and the block data preprocessing. When the block data to be executed during program operation is the block data specified by the repeat function, the preprocessing data stored in the preprocessing data memory area for the repeat function is transferred to the interpolation calculator and repeated. block data program operation processing means for transferring the preprocessing data stored in the preprocessing data memory area to the interpolation calculator when the block data is not specified by the function; Numerical control device with pre-processing function.