JPH0237404A - Numerical controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerical control device, and more particularly to a numerical control device capable of synchronously executing a plurality of machining programs.

[Prior Art] FIG. 7 is a block diagram of a numerical control device that can simultaneously and independently execute machining programs.

In Figure 7, (1a) and (1b) are shown in Figure 8 (a) (
Paper tapes (2a) and (2b) are perforated with the processing programs shown in b), respectively.
a), (1b) is a machining program analysis device that analyzes the machining program; (5a), (5b) is a movement that calculates the amount of movement based on the analysis results of the machining program analysis device (2a), (2b), respectively; quantity processing device, (6a), (e
b), (6c), and (6d) are movement amount processing devices (5a);
This is a motor that is driven based on the calculation result of (5b).

As shown in FIG. 7, the conventional numerical control device is composed of two systems, system 1 and system 2, and the program of system 1 and the program of system 2 can be executed independently and simultaneously. That is, the machining program analysis devices (2a) and (2b
) respectively analyze the machining program, and the movement amount processing devices (5a) and (5b) respectively control the motors (6a) to (6d) based on the analysis results of the machining program analyzers (2a) and (2b), respectively. It controls the drive.

In this case, a predetermined block of system 1 and a predetermined block of system 2 may be executed synchronously.

For example, the fourth block rN13 z200 of system 1 shown in FIGS. 8(a) and (b);
When executing the th block rN23XO; J at the same time, a machining program as shown in FIGS.

“i” shown in the machining program in Figures 9(a) and (b)
;'' is a synchronous command. This synchronization command "!;" instructs to start executing the block following the synchronization command at the same time. Due to the synchronization command "!;", the third block rNL2 X200 F2000. Even if the execution of J is finished, the third block rN22 of system 2
X300; until the execution of J is finished, the fifth block rN14 Z200. J is not executed. 3rd block of lineage 2 rN22 X300: J
When the execution of is completed, the fifth block rN1 of system 1
4 z200. J and the fifth block rN2 of lineage 2
4 XO; and J start execution at the same time.

[Problem to be solved by the invention] However, the synchronization command "!:" executes the machining program in ascending order of sequence numbers NIO, Nil, ... (hereinafter referred to as
It works effectively when the machining program is executed in the descending order of the sequence number (hereinafter referred to as the "reverse run"), but it is ignored when the machining program is executed in the descending order of sequence numbers (hereinafter referred to as "reverse run"). The problem was that it was not possible to

Furthermore, when checking the machining program, the machining program is executed one block at a time, so-called single block operation, but there is a problem that if the machining program is moved at the feed rate set in the machining program, it may not be possible to check the machining program. there were.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a numerical control device that can achieve synchronization even when reversing a machining program and can arbitrarily set the feed rate.

[Means for Solving the Problems] A numerical control device according to the present invention includes a feed rate conversion means that converts the feed rate set in each block of a plurality of machining programs into a predetermined feed rate, and A counting means that counts up when the direction of progress is forward and counts down when the direction of progress of the machining program is backward, and a count value of the counting means when each block is executed when the direction of progress of the machining program is forward. and a memory means for storing, and when the progress direction of the machining program is reverse and the count value of the counting means becomes equal to the count value stored in the memory means, each block corresponding to this count value is executed. and a synchronization control means for

[Function] The numerical control device having the above configuration executes the machining program at the feed rate converted by the feed rate conversion means when the progress direction of the machining program is forward, and the storage means stores each block of the machining program. The count value of the counting means when executing is stored.

Further, when the processing program is running in the reverse direction and the count value of the counting means and the count value of the storage means match, the synchronization control means causes each block corresponding to the count value to be executed.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a numerical control device according to an embodiment of the present invention. In Fig. 1, (1a) and (tb) are paper tapes perforated with the processing programs shown in Figs. 9 (a) and (b), respectively, and (2a) and (2b) are paper tapes (la), respectively. (3a) and (3b) are data transfer devices that receive and receive interpolated data from the machining program analysis devices (2a) and (2b), respectively. a processing device; (4a) and (4b) are interpolation data storage devices that read and write interpolation data; (5a) and (5b) are movement amount processing devices that calculate a movement amount based on the interpolation data;
(6a), (6b), (8C), (8d) are motors, (
7) is a manual feed rate dial to set the feed rate, (8)
) is a forward/reverse switch that selects forward or backward movement of the machining program; (9) is a speed control processing device that calculates the effective feed rate based on the feed rate of the machining program and the feed rate of the manual feed rate dial; ) is a synchronous control processing device that synchronizes system 1 and system 2.

Next, the operation of the numerical control device shown in FIG. 1 will be explained with reference to FIGS. 2, 3, 4, and 5.

In addition, FIG. 2 is a flowchart showing the operation of the speed control processing device (9), and FIG.
), (2b) and data transfer processing devices (3a), (3b
), FIG. 4 is an explanatory diagram of interpolation data, FIG. 5 is a flowchart showing the operation of the synchronous control processing device (10), and FIG. 6 is a timing chart of system 1 and system 2.

(1) Steps 821 to S24 When feed rate A is input using the manual feed rate dial (7) (step 821), and forward or reverse is input using the forward/reverse switch 8) (step S22), the speed is Processing control device (9) is 1 of system 1
The command speed B of the 1st block is input (step S23), and the command speed C of the machining program for the 1st block of system 2 is input (step 524).
. The command speed B and command speed C are determined by the machining program analysis devices (2a) and (2b), respectively, using the paper tape (1a).
and (1b).

In addition, depending on the program, the command speed can be entered using the keyboard (
Input may also be made using an input device such as a device (not shown).

(2) Steps 325 to S26 The speed processing control device (9) calculates the effective feed rate E of system 1 (step S25) and calculates the effective feed rate E of system 2 (step 828).

The effective feed rate and E are: D-(A/constant 1)×B as well as E-(B/constant 1)×C Calculated by

(3) Steps 331 to 334 The machining program analysis device that has read the machining program (
2a) and (2b) create interpolation data and output the progress direction (forward or backward) of the machining program to the data transfer processing devices (3a) and (3b) (step S3
1).

When the progress direction of the machining program is forward (step 532), the data transfer processing devices (3a) and (3b) store interpolation data in the interpolation data storage devices (4a) and (4b) (step 833), This interpolated data is output to movement amount processing devices (5a) and (5b).

Note that the interpolation data is created for each block as shown in FIG. 4, and is composed of an interpolation mode (linear interpolation or curved interpolation), a starting point, an ending point, a feed rate, and a count value.

Further, the count value indicates when each block is executed, and is calculated by (A/constant 2)×tOn. However, t is the time during which the forward/reverse switch (8) is in the forward or reverse direction.

The count value is counted by the synchronous control processing device (6).

When the progress direction of the machining program is forward, as shown in FIG. 6, system 1 runs from count value "0" to r200J, the first block rN10 Go
Count value r200 J to r500 J, second book rNll GI Zloo FlooO;
J , 7'7 Runt value r500J to r700J, 3rd block rNL2 X200 P2O00,
J, count value r70 (from 14 to r 1150J, 4th block rN13!; J, count value r
From 1150J to r 1350J, the fifth block rN14 Z200; J, . . . is executed.

Similarly, system 2 is r700J from the count value "0".
Until, the first book is N20 GI X200
FLOOO;J, count value r700J to r800
up to J, second block rN21 GO; J,
From count value "800" to r l100J, third block "N22X300.J, count value r
From l100J to r1150J, 4th block rN23! ;J count value r 1150J force) to r 1700J, 5th block rN24 XO
; J, . . . are executed as follows.

The data transfer processing devices (3a) and (3b) have already created interpolated data when the machining program is running backwards or forwards after going backwards (step S33). ), reads the interpolated data from the interpolated data storage devices (4a) and (4b) (step S34), moves the amount processing device (5a),
(5b).

The movement amount processing devices (5a) and (5b) drive the motors (6a) to (6d) based on the effective feed rate E and interpolation data output from the speed control processing device (9).

In this manner, in the single block operation, the machining program is analyzed block by block to create interpolation data, which is stored, and the motors (6a) to (6d) are driven and controlled based on the interpolation data.

(4) Steps 851 to 854 The synchronous control processing unit (klO) executes the 5th block rN142200; J of system 1 and the 5th block rN24 XO; - By the reverse switch (8) (step 551
), determine the direction of progress of the machining program (step 5
52).

The synchronous control processing device (10) counts up the counter value when the direction of progress of the machining program is forward (step S53), and counts down the counter value when the direction of progress of the machining program is backward (step S53).
54).

(5) Steps 355 to S62 When the synchronous control processing device (10) finishes executing the block being interpolated (step S55), the synchronous control processing device (10) executes the system '&
The machining program of system 1 and the machining program of system 2 are synchronized.

That is, when the progress direction of the machining program is normal, the synchronous control processing device (10) executes the machining program analysis device (2a).
), requests analysis of the next block for (2b) (
Step 557). Further, when the progress direction of the machining program is backward, the counter values stored in the interpolation data storage devices (4a) and (4b) are compared with the current counter value (step 958), and the stored counter value is is greater than or equal to the current counter value (step 859), the data transfer processing devices (3a) and (3b
) to read interpolated data (step 560
). Furthermore, when the progress direction of the machining program is forward after backward, the counter value stored in the interpolation data storage devices (4a) and (4b) is compared with the current counter value (step 561). If the counter value is less than or equal to the current counter value (step 5
62), requests reading of interpolated data (step 5
60).

The movement amount processing devices (5a) and (5b) both count the fifth block rN14 z200: J of system 1 and the fifth block rN24 xo; J of system 2 under the synchronous control of the synchronous control processing device (10). value r 11
Execution starts from 50J.

In this case, even if the machining program is running backwards or forwards after going backwards, the pattern shown in FIG. 6 will proceed from right to left according to the count value.

(6) Step 3133 The synchronous control processing device (10) repeatedly executes steps 354 to S[i2 until processing of all systems is completed.

[Effects of the Invention] As explained above, according to the present invention, when the progress direction of the machining program is forward, the count value of the counting means when each block is executed is stored, and the progress of the machining program is When the direction is reverse, the movement is performed at the feed rate set by the feed rate conversion means, and when the count value of the counting means and the count value stored in the storage means become equal, the synchronization control means changes the count value to Since the corresponding blocks are respectively executed, it is possible to obtain a numerical control device that can synchronize each machining program even when the machining program runs backwards.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a numerical control device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the speed control processing device shown in FIG. 1, and FIG. 3 is a processing process shown in FIG. Flowchart showing the operation of the program analysis device and data transfer processing device, FIG. 4 is an explanatory diagram of interpolation data, FIG. 5 is a flowchart showing the operation of the synchronous control processing device shown in FIG. 1, and FIG. 7 is a block diagram of a conventional numerical control device, and FIGS. 8 and 9 are explanatory diagrams of the machining program. In each figure, Las lb...Paper tape, 2a, 2b.
...Machining program analysis device, 3a, 3b...Data transfer processing device, 4a, 4b...Interpolation data storage device, 5a, 5b...Movement amount processing device, Gas 6b,
6c, 8d...Motor, 7...Manual feed speed dial, 8...Forward/reverse switch, 9...Speed control processing device, 10...Synchronization control processing device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In a numerical control device that simultaneously and independently executes a plurality of machining programs each consisting of a plurality of blocks, the feed rate set in each block of the plurality of machining programs is converted into a predetermined feed rate. a feed rate converting means for counting up when the machining program is running in the forward direction, and counting down when the machining program is running in the reverse direction; a storage means for storing the count value of the counting means when each block is executed; and a storage means for storing the count value of the counting means when the processing program is running in a reverse direction; 1. A numerical control device comprising: synchronization control means for executing each block corresponding to a count value when the count value becomes equal to the count value.