JPS60207910A - Numerical control device - Google Patents

Abstract

PURPOSE:To execute proper feeding speed override or main axis speed override automatically by storing a feeding speed override value and a main axis speed override value in a memory in accordance with an offset No. CONSTITUTION:An offset detecting means 100 and a command speed detecting means 101 detect an offset No. commanded at present by a command program and a feeding speed or main axis speed respectively. On the other hand, a storage control means 102 stores an override value set up by an override value setting means 103 in an area of a memory 104 which corresponds to the detected result of the detecting means 100. Then, an operating means 106 multiplies the override value read out from the memory 104 by the detected result of the detecting means 101. A control means 107 controls the feeding speed or the main axis speed in accordance with the operated result. Thus, proper feeding speed override or main axis speed override can be automatically executed.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement in a numerical control device, and more particularly to a numerical control device that can automatically perform appropriate feed rate overrides and spindle speed overrides. be.

Conventional technology and problems Numerical control devices move the workpiece and cutter relatively along a path according to the machining path information included in the command program, but the relative feed rate is determined by the cutting speed in the command program. Commanded by the command, the cutter is installed 4J
The rotational speed of the spindle is specified by the spindle speed command.

By the way, the creation of the command program that controls the operation of the numerical control device is done based on a design drawing, and it is not possible to fully consider the abrasive quality of the cutter and workpiece, so it is difficult to determine the appropriate cutting speed. There were cases where it was not possible to give commands and spindle speed commands.

To deal with such a case, conventional numerical control devices have an override dial on the operation panel so that the feed rate or spindle speed commanded by the command program can be corrected by the operator's dial operation. However, with this conventional device, the operator operates the override dial and corrects the feed rate or spindle speed without looking at the actual machining status, so it has the disadvantage that the operator must constantly monitor the machining status of the workpiece. was there. Furthermore, when machining a plurality of workpieces into the same shape, if the feed rate or spindle speed is corrected twice by the operator's dial operation, there is a risk that the machining accuracy of each workpiece will be different.

OBJECTS OF THE INVENTION The present invention has been made to improve the above-mentioned drawbacks, and its purpose is to automatically perform appropriate feed rate override or spindle speed override.

Configuration of the Invention FIG. 1 is a configuration diagram of the present invention. Offcent number detection means 100 detects the offcent number currently commanded by the command program, and command speed detection means 101 detects the feed speed or spindle speed currently commanded by the command program. The storage control means 102 transfers the override value set by the override value setting means 103 to the offset number detection means 100 of the memory 104 according to the storage command.
is stored in an area corresponding to the detection result. The processing time successive output means 105 includes an offset number detection means 1 in the memory 104.
The calculation means 106 reads out the override value stored in the area corresponding to the detection result of 00, and the calculation means 106 multiplies the override value read from the memory 104 by the detection result of the command speed detection means 101. 106
The °C feed rate or spindle speed is controlled based on the calculation result.

Embodiment of the Invention FIG. 2 is a block diagram of an embodiment of the present invention, in which 1 is a microprocessor, 2 is a tape league, 3 is a command tape, 4 is a working memory, and 5 is a non-volatile memory for storage. Memory, 6 is an operation panel, 7.8 is an override dial for setting override values for the feed rate and spindle speed, 9 is a keyboard, 10 is a data output section, 11 is a spindle motor control unit, 12 is a servo unit, 13 is a Spindle motor, 14 is a speed detector, 15 is a spindle head, 16 is a spindle, 17 is a tapper, 18 is a tool, 19 is a pulse generator, 20.21° 22 is an interpolator for the x, y, and z axes, respectively.
23.24.25 are the servo units for the x, y, and z axes, respectively.

27.28 are x, y, z axis motors, 4, 30 respectively
31 is a position detector, 32 is a tool changing unit, and 33 is a workpiece.

Furthermore, Fig. 3 shows an example of a command program recorded on the command tape, in which block #l records the program number of the command program, and block #2 shows the number of commands per unit time of the spindle. The spindle speed command that commands the rotation speed S of block #3 does not indicate that this block is a block that commands positioning, and the code GOO and x
, the amount of movement in the y and z axis directions XI, yl, zl and the feed rate f
1 is recorded. Further, block #4 includes a code Got indicating that the block is a block that commands linear interpolation, and a movement amount X2 in the x, y, and z axis directions. yz, 2
2 and feed rate "2" are recorded, block #5 has a tool change command, and block #6 has a code G4 indicating that this block is a block that commands tool radius correction.
] and offsen 1 number DI are recorded. Also,
Block #7 does not indicate that the block is a block that commands positioning, and contains the code GOO and the amount of movement in the x, y, and z axis directions X3. y3. z3 and feed rate r3 are recorded, and block #8 does not indicate that this block is a block that commands linear interpolation, but has the code GOI and x, y.
, the amount of movement in the z-axis direction x4. y4. z4 and feed rate f
4 is recorded.

Furthermore, FIG. 4 is a memory map showing the contents of memory 4, including an area for storing offset numbers, an area for storing program numbers, and an area for storing offset numbers.
- Write down the feed speed override value and spindle speed override value corresponding to Dn 1. Areas #BO to #Bn for α are provided.

FIG. 5 is a memory map showing the memory contents of the memory 5, with offset numbers ~Dn and offset numbers) mdo~
Areas #CO to #Cn where dn are stored in correspondence with °ζ
and areas #PO to #Pn for storing program numbers,
For each 1-hour program, set the feed speed override value V and spindle speed override F value Sν to offset numbers DO to Dn.
Areas stored corresponding to #EO-0 to #EO-n,
#El-0~#El-n--#En-0~#E
nn is provided.

First, to briefly explain the present invention, the present invention stores the override value set by the override dial 7°8 in the memory 5 during the test run of the th tape 3, and stores it in the memory 5 when performing actual processing. The feed rate or spindle speed is automatically corrected based on the stored override value.

FIG. 6 is a flowchart showing the processing contents of the microprocessor l when the override value set by the override dial 7.8 is stored in the memory 5, and the operation of FIG. 2 will be explained below with reference to the same figure. .

When an instruction is given to store an override value, the microprocessor 1 first stores an offset number in a predetermined area #A1 of the working memory 4 shown in FIG.
DO" (step S1), then set N=1 (step S2), and then store block #N of the command program recorded on the command tape 3 (N-1 in this case).
is read (step 33). Next, the microprocessor 1 determines whether a program number is recorded in the block #N (step S4). Judgment result is YES
In the case of S, the microprocessor l stores the program number recorded in the block #N read in step S4 in a predetermined area #A2 of the memory 4 (step S5).
Then, the program numbers stored in area #A2 are areas #PO and PI of memory 5.

-1----- is stored (step S6).

If the determination result in step S6 is YES, the microprocessor l stores the feed speed override value V and spindle speed override value sv stored in the area corresponding to the program number stored in area #82 in the memory 4. are transferred and stored in areas #BO to Bn (step 37). For example, if the same program number as the program number stored in area #^2 is stored in area #P1, area #[! Transfer the feed speed override values vl-0 to vl-n and the spindle speed override values 5vl-0 to Sshi1-n stored in 1-0 to #E1-n to areas #BO to #Bn of memory 4. It is something to remember. When the process of step S7 is completed, the microprocessor 1 increments N by +1 (step S8), and then returns to the process of step S3. If the determination result in step S6 is NO, the microprocessor 1 stores 100% as the feed speed override value and spindle speed override value in areas #BO to Bn of the memory 4 (step S9), and then increases N by +1.
After that, the process returns to step S3. In the command program shown in FIG. 3, the above-described processing is performed when block #l is read.

If the determination result in step S4 is NO, the microprocessor 1 determines whether the block #N read in step S3 is a block that commands the tool diameter and offset of the tool position (step knob 511). .

If the determination result in step Sll is YES, the offset amount corresponding to the offset number recorded in the block is read out from the holding memory 5, and the tool diameter or tool position offset processing is performed (step 512). When determining that the process in step S12 has been completed (step 513), the microprocessor l stores the offset number recorded in block #N read in step S3 in a predetermined area #^1 of the memory 4 (step 514).
), then increment N by +1 (step 515), and then return to step S3. In the processing program shown in FIG. 3, when block #6 is read, the above-described processing is performed and the offset number DI is stored in area #^l of the memory 4.

Further, if the determination result in step Sol is NO, the microprocessor l reads the block # read in step S3.
It is determined whether N is a block that commands the end of machining (step 316). If the II tili result is NO, the microprocessor 1 executes processing according to the read block (step 517), and during the execution of the processing, the feed speed override value and spindle speed override value can be stored from the keyboard 9. When commanded, step S] 8) reads the override value set on the override dial 7.8 (step 521), and writes it in area #A1 of the memory 4. Offcent number f being Q
The override value read in step S21 is stored in areas #BO to #Bn of the memory 4 corresponding to lO=Dn (
step 522), then increase N by +1 step 520
), after which the process returns to step S3.

The processing of steps SIT to SI9 is performed in block #8 of Fig. 3.
Taking the case of reading as an example, the explanation is as follows. When reading block #8, microprocessor 1 reads the X recorded in block #8.

Amount of movement in the y and z axis directions x4. y4. z4 to interpolators 20-22, respectively. Next, the micro processor 1 multiplies the feed rate f4 recorded in block #8 by the feed rate override value V set by the override dial 7, and applies the multiplication result v-f4 to the pulse generator 19. At the same time, the spindle speed S commanded in block #2 is multiplied by the spindle speed override value sv set by the override dial 8, and the multiplication result 5
V-8 is added to the spindle motor control unit 11. The main shaft motor control unit 1 applies a voltage corresponding to the multiplication result to the servo unit 12, and the output of the servo unit 12 causes the main shaft motor 13 to rotate at a speed corresponding to the multiplication result 5v-3. Further, the pulse generator 19 outputs the multiplication result V・f4
Add a pulse with a frequency corresponding to to the interpolators 20 to 22,
Interpolators 20-22 perform pulse distribution in synchronization with the pulse train from pulse generator 19, and servo units 23-2
5 drives the motors 26 to 28 in accordance with the interpolation pulses from the interpolators 21 to 23, moves the work 33 and the tool 18 relatively at a speed corresponding to the multiplication result ■・r4, and executes machining of the work 33. . In addition, override dial 7.
Every time the override values V and VS set by 8 are changed, the microprocessor I multiplies the feed speed f4 and the override value ■, and calculates the spindle speed S and the override value sv.
It performs multiplication with . While the workpiece 33 is being machined as described above, the operator operates the override dial 7.8, and when the feed rate and spindle speed are optimal, input the feed rate override value V from the keyboard 9. and commands to store the spindle speed override sv. When determining that storage of the override values V and Sν has been instructed (step 31B), the microprocessor 1 stores the override values V and SV set by the override dial 7.8 in the area # of the memory 4.
It is stored in the area corresponding to the offset number stored in area #81 in BO~#B (step 52
2).

In this case, in area #81, when block #6 was processed, offset number 1 and old number 1. Since the override values SV and V are stored in area #B1.

Further, if the determination result in step S16 is YES, the microprocessor 1 stores the override values v and sv stored in areas #BO to #Bn of the memory 4 in a predetermined area of the memo I 75 (step 523).

For example, if the program number written in area #^2-C of memory 4 is stored in area #P1 of memory 5, the stored contents of area #BO=Bn are stored in area #IEI-0~ of memory 5. It is transferred to the IEI-n and stored. Also, if the program number iQ written in area #^2 of memory 4 is not stored in areas #PO to #Pn of memory 5, the program number iQ written in area #^2 of memory 4 is not stored in areas #PO to #Pn of memory 5. The program number is stored in the area #[10-0~#[! 0-n, --, # En
-0 to #tin-n, the storage contents of areas #110 to #9Bn are transferred to the area corresponding to the free area.

That is, by executing the process of flowchart 1 shown in FIG.
The feed speed override value ■ and the spindle speed override value Sv are stored for each gram in correspondence with the offset number.

Figure 7 shows the microprocessor 1 used during actual processing.
2 is a flowchart showing the processing contents, and the operation shown in FIG. 2 during machining operation will be explained below with reference to the same figure.

When the start of machining is commanded, the microprocessor 1 first sets N to "1" (step 330), and then executes block #N of the command program recorded on the th order tape 3.
is read (step 331), and it is determined whether a program number is recorded in the block (step 53).
2). If the judgment result is YES, the microprocessor sensor 1 should transfer the feed speed override value ■ and spindle speed override value sv corresponding to the command program stored in the memory 5 to the areas JM#BO to #Bn of the memory 4. Step 533), then the program number recorded in the block is stored in area #A2 of the memory 4 (step 534), and then N is incremented by +1 step 535), after which the process returns to step 331. For example, step 3
If the program number recorded in the block read in step 31 is stored in area #Pn of memory 5, microprocessor 1 reads areas #En-0 to #E of memory 5.
Feedrate override value vn- stored in n-n
0 to vn-n and spindle speed override value s v n
-0~s v'ii'f-Memo January Area #BO~#
Further, if the determination result in step S32 is NO, the microprocessor 1 determines whether the block read in step S331 is a block that commands the tool diameter and offset of the tool position. (step 336). Judgment result is Y
In the case of ES, the feed speed override value and spindle speed override value corresponding to the offset number recorded in the block are read from the memory 4 (step 537).
For example, if the offset number recorded in the block is D2, the feed speed override value and spindle speed override value stored in area #B2 of the memory 4 are read. When the process of step 337 is completed, the microprocessor 1 increments N by 1 (step 33B) and returns to the process of step S31.

If the determination result in step S36 is No, the microprocessor 1 determines whether the block read in step S31 is a block that commands the end of machining (step 539). If the determination result is NO, the microprocessor I executes processing according to the read block (step 540).

For example, when block #8 of the processing program shown in FIG. 3 is read, the microbe 1 controller 1 first moves the amount X4.
y4. Add z4 to interpolators 20°21.22, respectively. Next, the feed speed f4 recorded in block #8
and the feedrate override value read in step 336■
The multiplication result f4·■ is added to the pulse generator 19, and the spindle speed S commanded in block #2 is multiplied by the spindle speed override value Sν read in step S36, and the multiplication result 5- sv to the spindle motor control unit 11. As a result, as described above, relative feeding between the tool]8 and the workpiece is performed at a speed corresponding to the multiplication result f4·V, and the spindle motor 13 rotates at a speed corresponding to the calculation result 5-sv. do. And step S3
When it is determined that the process in step 9 has been completed, step 341)
Microprocessor 1 increases N by +1 (step 542)
, the process returns to step S31.

In addition, if the lucky result (judgment in step S39) is YIES, the microprocessor 1
The feed speed override value and spindle speed override value stored in area #A2 are transferred and stored in a predetermined area of the memory 5 according to the program number stored in area #A2 (
Step 543), after which the process ends. For example, if the program number stored in area #A2 of memory 4 and the program number stored in area #PI of memory 5 are the same, then 1. α
Save the contents to memory 5 area # [! 1-0 to #El-n are transferred and stored.

That is, by executing the process shown in the flowchart shown in FIG. 7, the feed rate override value and spindle speed override value corresponding to the offset number during machining are read from the memory 4, and the feed rate and spindle speed are automatically corrected. will be done.

In the above embodiment, the feed rate override value and the spindle speed override value are stored in the memory in correspondence with the offset number, but it is of course possible to store either one of them. . Further, in this embodiment, since the speed override value and the spindle override value are stored in correspondence with the offset number, the memory capacity can be reduced. In addition, the feed rate and spindle speed generally need to be the same if the tools are the same, so as in this example, the feed rate override value and spindle speed override value are stored in memory corresponding to the offset number. Then, the feedrate is set according to the feedrate override value corresponding to the offset number during machining and the spindle speed override value.

Even if the spindle speed is modified, an appropriate feed rate of 5 spindle speeds can be obtained.

As described in detail, the present invention includes an offset number detecting means (comprised of a microprocessor sensor 1 in the embodiment) for detecting an offset number currently commanded by a command program; Command speed detection means (comprised of microprocessor 1 in the embodiment) for detecting the commanded feed speed or spindle speed, and override value setting means (for setting an override value).
In the embodiment, it consists of an override dial 7.8), and a storage control means (which stores the override value set by the override value setting means in response to a storage command in an area of the memory corresponding to the detection result of the offset number detection means).
In the embodiment, it consists of a microprocessor 1);
At the time of processing, a succession means (consisting of the microprocessor 1 in the embodiment) reads out an override value stored in an area corresponding to the detection result of the offset number detection means of the memory, and an override value read out by the succession means. a calculation means (comprised of a microprocessor 1 in the embodiment) for multiplying the command speed by the detection result of the command speed detection means; and a control means (for the embodiment) for controlling the feed speed or spindle speed based on the calculation result of the calculation means. In the microprocessor 1,
Since it is equipped with interpolators 20 to 22 (consisting of spindle morph control unit 1, servo unit +2, 23 to 25, etc.), appropriate feed speed override and spindle speed override can be automatically performed. It has the advantage of being able to Moreover, the present invention sets the override value to 7!
・Write in correspondence with the numbers 1. .alpha., there is also the advantage that the memory capacity can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a block diagram showing an example of a command program, FIG. 4 is a memory map showing the storage contents of the memory 4, and FIG. 5 is a memory map showing the contents stored in the memory 5, and FIGS. 6 and 7 are flowcharts showing the processing contents of the microprocessor 1. 1 is a microprocessor, 2 is a tape league, 3 is a 1-order tape, 4, 5, 104 is a memory, 6 is an operation panel, 7,
8 is an override dial, 9 is a keyboard, ]O is a data output section, 11 is a spindle motor control unit, 12 is a servo unit, 13 is a spindle motor, 14 is a speed detector,
15 is a spindle head, 16 is a spindle, 17 is a tapper, 18 is a tool, 19 is a pulse generator, 20 to 22 are interpolators,
Angler is the servo unit, 29-31 is the motor, 29-31 is the position detector 232 is the tool change unit 1-133 is the workpiece,
100 is an offset number detection means, 101 is a command speed detection means, 102 is a memory control means, 103 is an override value setting means, 105 is a succession means, 106 is a calculation means, 1
07 is a control means. Patent Applicant Fanasoku Co., Ltd. Representative Patent Attorney Gobe Tamamushi (2 others) Figure 1'-(Figure 3 Figure 4)

Claims (1)

[Claims] In a numerical control device that processes a workpiece according to a command program, an offset number detection means for detecting an offset number currently commanded by the command program and a feed rate or spindle speed currently commanded by the command program are provided. a command speed detection means for detecting;
an override value setting means for setting an override value;
a memory having an area for storing override values corresponding to offset numbers; and storage control for storing the override value set by the override value setting means in response to a storage command in an area of the memory corresponding to the detection result of the offset number detection means. means for successively reading the override value stored in the area corresponding to the detection result of the offset number detecting means of the memory during machining; and detecting the override value successively received by the successive reading means and the command speed detecting means. 1. A numerical control device comprising: a calculation means for multiplying the result by the calculation means; and a control means for controlling the feed rate or spindle speed based on the calculation result of the calculation means.