JPS59192440A - Control device for resumption of nc processing - Google Patents

Abstract

PURPOSE:To enhance the processing efficiency in an NC system to make an uncontinuous processing, by incorporating such an arrangement that the position of resumption is judged automatically in case a processing has been interrupted and is to be resumed, and thereby facilitating the resumption. CONSTITUTION:If a processing is interrupted, a modal data at the time of interruption, the sequence number of the processing start locational block for the point till which the processing has been conducted or from which the processing was to be commenced, and the processing start position are stored in an unvolatile memory 3. If key entry is made at the time of resumption, a micro-computer 1 searches the sequence number stored in the memory 3 out of the program, and the procesing start locational block is detected, and then the processing start position is read out of the memory 3. Then the subsequent block is refered to, and if there is any alteration in the modal data, the information shall be updated and now the processing is resumed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application and Prior Art-2- The present invention relates to a control device for one machine tool, etc.

The present invention relates to a numerical control device that does not process a workpiece continuously but intermittently, such as a drilling machine that drills a plurality of holes.

For example, in the numerical control device of a drilling machine that drills a plurality of holes in a workpiece W as shown in Fig. 1 (see Fig. 2), the tool is programmed to set the drilling start position in block B1 as shown in Fig. 2. 1”+ (X+ yIZ+), and in the next block B2, the position P of the surface of the workpiece W is
2, the drilling process is started in one direction, for example, in the Z-axis direction [this is fast forwarded, and the drilling process is started from position P2 ()h 1/+ 22), and the drilling process is performed until the final position P4.
Next, it is reversed and returns to the position P7, which is equal to the hole starting position P1, and then automatically or the operator inputs a command to move to the next step while checking the condition of the hole. , move to the next hole U device. Although such an operation is performed, as shown in Fig. 2, at the point indicated by 87 during hole-3 drilling from position P2 to position P3, a power outage or re-retching occurs.
If the drilling process is stopped at d3 and the process is started again, in the incremental method, if the process is continued as it is, the process shown in FIG. 3 will be performed. If it is 1, the machining from the stop position S7 to the end point P3 of the block B3 in FIG. 2 is not performed, and the machining process of the block B4 from the position P3 to P4 is performed together with the machining process 1). As a result, the hole did not reach the specified position, and the hole was moved from position fifsZ to P3 in Figure 2.
In addition, the tool does not return to the drilling start position P1, but returns to point P7', which is shifted in the Z-axis direction, as shown in FIG.

Therefore, in order to avoid the above-mentioned machining errors, conventionally the process is stopped in the middle of machining such as hole machining, and when restarting it, the program is restarted from the beginning, or the sequence number is searched and the process is started at an appropriate location. The user had to go back and redo the process, or go back manually.

This work for restarting is a wasteful work, and the efficiency is -4- is not good.

OBJECTS OF THE INVENTION It is an object of the present invention to improve the above-mentioned drawbacks, and to automatically determine the restart position no matter where the machining is, so that the stop 1-
An object of the present invention is to provide a numerically controlled machining restart control device that allows machining to be continued from the previous position.

Structure of the Invention FIG. 4 is an explanatory diagram of the structure of the present invention. The non-volatile memory MEM stores the latest information such as modal data, a specific code attached to the hole start positioning block, for example a sequence number, and a hole start position in the case of an incremental method. When a machining restart command is input from a key manual means MDI such as a cycle start button, the restart machining start positioning block indexing means BDT starts machining of the suspended machining based on a specific code stored in the non-volatile memory. The positioning block is indexed from the NO program, and the contents of the next block after the machining start positioning block are decoded (position data and Mogoo 5-Rudek'4), and the tool stop 1 block detection means PST is used to specify the block. The tool position indicated by the current value counter COU is compared with the tool stop position indicated by the current value counter COU, and if the tool stop position is larger, the next block is decoded, and as before, the command in that block is decoded. Compare the tool position and the tool stop position. If the incremental method is used, the read position command values of each block are added and the added value is compared with the tool stop position.

Such processing is performed until the tool position commanded by each block exceeds the tool stop position, and the tool stop position block is detected. Then, when the block is detected,
The control means CN and T perform processing according to the modal data read during the above processing up to the position specified by the block, and perform processing from the next block according to the normal processing flow.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 5 to 8.

-6- Fig. 5 is a block diagram of main parts showing an example of the hardware configuration of the apparatus according to the embodiment of the present invention, in which 1 f, t micro combi coater, 2 a CMO which stores NC nib D-grams;
It is possible to configure the S memory with command data and a data reader to read it. Further, 3 is a writable and readable non-volatile optical memory, 4 is a manual data input device, 5 is its interface circuit, 6 is an axis control circuit, 7 is a servo amplifier, 8 is a -[-bo motor, and 9 is a position detection device. vessel, 10
is a current value counter composed of non-volatile elements. Note that the axis control circuit 6. i+-bo motor amplifier7. For convenience of explanation, only the shaft portion of the servo motor 82, position detector 9, and current value counter 10 are shown.

Further, FIG. 6 is a flowchart showing an example of the software configuration of the software 1 of the apparatus according to the embodiment of the present invention.

The micro combicoater 1 reads and decodes the NC nib [1 gram block by block] stored in the CMOS memory 2, controls the axis control circuit 6 as known in the art, and outputs -IJ-
-IJ--drives the BoE-taper 8 via the Bo amplifier 7 ωJ
Then, a predetermined numerically controlled machining is carried out, and at the same time, the processing shown in FIG. 6 is carried out.

Of course, if the modal data is changed during the execution of the NC machine program, the stored information in the modal information storage area of the non-volatile memory 3 is rewritten, and the modal data at the time of current machining is always retained in the non-volatile memory 3. (Steps S1 and S2).

Even if the conventional number (Po1) is J'3 in the control device, the modal data at the time of current machining is generally stored in memory etc.
The above processing can be performed by writing the contents of the memory etc. to the non-volatile memory 3. Of course, it is also possible to configure the above memory etc. with a non-volatile memory etc.

Furthermore, the latest modal data may be stored at the time of execution of a machining start positioning block, which will be described later.

Further, the microcomputer 1 determines whether the block to be executed is an IJIT start positioning block (step 83). This is done in advance as a sequence number, for example N, as a specific code in the machining start positioning block.
This is done by adding 7000 to N7999 to a3 and identifying this sequence number. For example, if the position -8- spacing block for the hole represented by #4 in Fig. 1 is set to 81, then the sequence number of N7004 is set to this block B1 as shown in Fig. 7.
Leave it on. Now, when the block 81 is read by the program and the microcomputer 1 determines that it is the hole machining start positioning block, it stores the sequence number in the sequence number storage area of the non-volatile memory 3 or updates the previous contents. At the same time, the hole machining start position, that is, the end point position of the hole machining start positioning block is detected, and this position is stored in the hole machining start position storage area of the nonvolatile memory 3, or the previous contents are updated (step 3
4.85). Note that if the absolute method is used, there is no need to memorize the hole machining start position.

Further, since means for detecting the tool position are already known, the tool position can be detected using these methods. In FIG. 5, this is done by reading the contents of the current value counter 10 which is counted up and down from 1 to 1 by the output pulse of the position detector 9.

-〇- The above-mentioned processing is continuously performed during processing (step S6). Therefore, if machining is interrupted for some reason such as a power outage or a stop operation, the non-volatile memory 3 will contain the modal data at the time of machining interruption, the data that was completed or about to be executed just before the machining was interrupted. The sequence number of the hole machining start positioning block and the information of the hole machining start position are stored.

Therefore, as shown in FIG. 7, if the machining is interrupted during the machining, as shown in FIG.
For example, if the vehicle stops at point 7) or on the way back from Taisei (P4) (for example, point 87),
To explain one embodiment of the restart processing of the present invention, first, when a cycle start button provided on the machine side is pressed or a separate key manual means is commanded to restart processing, the processing shown in FIG. 8 is performed. . That is, the microcomputer 1 uses the sequence number stored in the non-volatile memory 3 as shown in FIG. 7(a) above.

-10- In the example shown in (b), a matching sequence number such as sequence number N7004 is selected from the cutting program to detect the positioning block B1 at which hole machining is to be started (Step 87). If it is an incremental method, the hole machining start position stored in the non-volatile memory 3,
If the absolute coating method is used, the hole machining start position indicated by the detected hole machining start positioning block is stored in the command position register R (step 8). Next, the contents of the next block (B2) are decoded (step 9), and if there is a change in the mortal data, the stored information in the modal information storage area of the nonvolatile memory 3 is rewritten.

Then, the command end point position of the block B2 is added to the command position register R if the incremental method is used,
If the absolute system is used, the contents of the register R can be replaced at the commanded position of block B2. In this embodiment, since an incremental method is used, the value is added to the register R as described above (step 810).The value of the register R thus obtained is -11- at the position P2 in FIG. will be shown. Therefore, the value of this register R and the current value J
Compare the S7 position where the J' tool is stopped, as indicated by the counter.
Note that in this embodiment, holes are to be drilled in the Z-axis direction, so this comparison is made only in the Z-axis, and the register R is compared only in the Z-axis.
(In this example, since the movement is in the negative direction of the Z axis, the inequality in step S11 in FIG. 8 is reversed when expressed as an absolute value.)
Since the distance between P+ and P2 shown in FIG. Then, if there is modal data, update it and add the command position of the block B3 to the register R (the value of the register R indicates the position of P3 in Fig. 7 (a)), and the value of the 7 axes of the register R and the tool. [stops] 1-S
Compare the Z-axis values at 7 positions. In this case, as shown in Fig. 7 (a), the distance between P+ and P3 is larger than the distance between Pl and 3Z, so the value of the tool stop position SZ is larger than the value of register R. , in this case -12- Processing is performed according to the stored modal data up to the value of register R, that is, up to the position P3 in FIG. 7(a). Then, the processing of block B4 and subsequent blocks after position P3 changes to normal processing. Also, as shown in Figure 7 (B), if there is an interruption on the return path of hole drilling, Figure 7 (B)
This process is the same as that described for the interruption on the outbound trip shown in .

In the above embodiment, a specific sequence number (N7000-N7999) is entered as a specific code in the machining start positioning block in discontinuous machining, and is stored every time the machining start positioning block is read. When machining was interrupted in the middle, the sequence number was searched and restart processing was performed, but by adding a read pointer indicating the character number of the machining start positioning block and storing it, restarting after machining was interrupted. If you do,
Processing may be restarted from that read pointer.

Effects of the Invention and More) As described above, the present invention has the advantage of discontinuous processing.
- In the numerical control method for processing, when processing is interrupted and restarted, the machine automatically determines the restart position and processing, so there is no trouble associated with restarting. This method does not require extensive work and can improve processing efficiency.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a machining process suitable for employing the numerically controlled machining restart control device of the present invention, FIG. 2 is an explanatory diagram of drilling process, and FIG. 3 is an explanatory diagram showing the drawbacks of the conventional method. 4 is an explanatory diagram of the configuration of the present invention. FIG. 5 is a hardware configuration diagram of an apparatus according to an embodiment of the present invention. FIGS. 6 and 8 are flowcharts of an apparatus according to an embodiment of the present invention. The figure is an explanatory diagram of processing in an apparatus according to an embodiment of the present invention. 4...Manual data input device, 9...Position detector, W
...Workpiece, 81-B...Block, P1-P
7...Position, SZ...Interrupted tool stop position. -14- Figure 6 1 Figure 8

Claims (4)

[Claims] (1) In a numerical control device that performs intermittent machining according to the commands of an NC program, there is a non-volatile memory that stores modal data in the program, a specific code attached to the machining start positioning block, and a key for commanding resumption of machining. Manual means and restart machining start positioning block indexing means that determines the machining start positioning block for the interrupted machining from the NC program based on a specific code stored in the non-volatile bamboo memory when a machining restart command is input. , a current value counter that stores the tool stop position, a tool end point position indicated by a block after the restart machining start positioning block indexed by the restart machining start positioning block indexing means, and the value of the current value counter. A tool stop block detection means-1- for detecting tool stop 1 nib block by comparison, and a modal stored in the non-volatile memory up to the tool end point position indicated by the tool stop block detected by the tool stop block detection means. A numerically controlled machining restart control device characterized by comprising a control means that performs machining based on data and then performs normal processing. (2) If controlled by the incremental method,
2. The numerically controlled machining restart control device according to claim 1, wherein the nonvolatile memory also stores a machining start position that is set in a machining start positioning block. (3) The numerically controlled machining restart control device according to claim 1 or 2, wherein the specific code 1ζ is a specific sequence number. (4) The above specific code is a display reading pointer for the number of characters from the beginning of the program! #W [Numerically controlled machining restart control device according to claim 1 or 2.