JP3034270B2 - Operation control device in NC processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial Application Field) The present invention relates to an NC such as a wire cut electric discharge machine.
The present invention relates to an operation control device for an NC processing machine that interrupts a current processing, performs another processing, and continues the previous processing again when the interrupted processing is completed in the operation of the processing machine.

(Prior art) Conventionally, many operators of NC processing machines perform various types of processing efficiently, so before starting processing, estimate the processing time required for each processing and calculate it based on the calculation. 1 in
A processing schedule is set up on a daily or weekly basis, and the machine is operated efficiently at night.

Regardless of the machining schedule created in this way, for example, wire electric discharge machining, which requires a long time for machining,
There are many cases in which a request for urgent processing is received after starting a processing that requires days. .

A user who has a plurality of processing machines can respond to this situation to some extent by managing the machines, but it is difficult for a user who has only one processing machine to deal with the situation, and one of the following three methods must be selected. Must.

(1). Ask another processor.

(2). Wait until the current machining is completed.

(3). Dangerous, interrupt the current processing and interrupt the urgent processing.

However, the methods (1) and (2) are rarely selected from the viewpoint of urgency, and the urgent workpiece can be clamped to another location within the machining range of the machine without removing the current workpiece from the table. Where possible, the method of (3) is often used.

When adopting the method of (3), always consider that there is a danger that machining that has been progressed halfway will end in failure if the continuation of interrupted machining cannot be restarted without fail after the completion of interrupted machining. Must. The processing operator had to perform the following operations carefully and without fail.

(A) Stop the processing.

(B) Write down the current absolute coordinate values of each axis and the like.

(C) Write down all necessary information related to NC operation, such as the current block number, execution program name, and whether or not the mirror function is used.

(D) Perform NC reset.

(E) Clamp the interrupted workpiece at another location within the processing range.

(F) Positioning to the machining start point of the interrupted workpiece,
Call the interrupt processing program and execute the interrupt processing.

(G) When the interruption processing is completed, the table is moved to the processing interruption point noted in (B).

(H) The execution program name, the use of the mirror function, and the like noted in (C) are similarly set.

(I) The program is advanced by machine lock and dry run until the block number and coordinate value noted in (C) and (B) are reached.

(J) Release the machine lock and dry run and resume processing.

(Problems to be Solved by the Invention) By the way, in each of the above-described operations, there are many problems as described below, and there is a problem.

In other words, the wrong coordinate values may have been written down, or some of the necessary NC information, execution status, coordinate values, etc. may be forgotten to be written, or the memo may go to somewhere. I may go.

The operation until the restart of machining is complicated and time-consuming, and when the NC program is advanced to the interruption point in the operation (I), it is difficult to stop the execution of the NC just when the interruption point is reached.

In addition, if it failed, it had to start over.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the need for a memo and to eliminate any mistakes or omissions in memory due to the memo, to interrupt the current processing, execute the interrupt processing, and re-start the processing. It is an object of the present invention to provide an operation control device for an NC machine capable of continuing the continuation of the interrupted machining and automatically and in a short time.

[Structure of the Invention] (Means for Solving the Problems) In view of the above problems, the present invention provides a display device provided in an NC processing machine operated under the control of a computer provided in an NC device. A set memo key and a call memo key are displayed only when the NC processing machine is interrupted.An NC status file that stores the current NC status by touching the set memo key and the current coordinate of each axis. A position file for storing values is provided.By touching the call memo key, the NC state at the time of interruption stored in the NC state file is read into the computer, and the set memory point switch provided on the operation panel is pressed. In this way, each coordinate value at the time of interruption stored in the position file is read into the computer and automatically returned to the machining interruption point at the time of interruption. It is a result.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the present embodiment, an NC wire-cut electric discharge machine will be described as an example of the NC machine, but it goes without saying that other NC machines may be used.

Referring to FIG. 1, a nut member 5 protruding downward is provided below the X-axis table 3 in the NC wire cut electric discharge machine 1, and the nut member 5 is provided in the X-axis direction (FIG. 1). , A ball screw 7 extending in a direction perpendicular to the paper surface) is screwed. An X-axis motor 9 such as a servomotor is interlockedly connected to one end of the ball screw 7, and the X-axis motor 9 is provided with a position detector 11.

A nut member 13 protruding upward is integrated with the upper part of the X-axis table 3, and a ball screw extending in the Y-axis direction (left-right direction in FIG. 1) is provided on the nut member 13.
15 is screwed. A base 17A of an L-shaped Y-axis table 17 is attached to one end, for example, the right end of the ball screw 15, and a Y-axis motor 19 is interlocked. The Y-axis motor 19 is provided with a position detector 21.

A work table 23 is erected on the left side of the Y-axis table 17, and a work W to be processed is placed on the work table 23. Above and below the work W, upper and lower wire guides 25 and 27 are provided at corresponding positions.

The wire electrode 29 drawn out from a wire electrode supply reel (not shown) is wound on a wire electrode take-up reel (not shown) via an upper wire guide 25, a work W, and a lower wire guide 27. In addition, a processing power source 31 is connected to the upper wire guide portion 25 and the work W.

With the above configuration, when the X-axis and Y-axis motors 9 and 19 are driven, the X and Y-axis tables 3 and 17 are moved in the X-axis and Y-axis directions, so that the work W also moves in the X-axis and Y-axis directions. Will be done.
When a machining pulse is supplied from the machining power supply 31 to the machining gap formed by the work W and the wire electrode 29, the machining pulse is applied by the work W and the wire electrode 29 to perform electric discharge machining.

A computer 33 equipped with a CPU among the NC devices for controlling the entire wire-cut electric discharge machine 1 is provided. The computer 33 has an interface 35 through which the machining power source 31, the axis driver 37 and the remote controller & It is connected to the operation panel 39.

The interface 35 controls input and output to and from the computer 33.
An appropriate voltage is output to the X-axis and Y-axis motors 9 and 19 based on the axis movement pulse command output from the controller and the axis position information obtained by the position detectors 11 and 21.

The computer 33 is connected to a CRT 41 as a display device, a touch input means 43 as an input device, a hard disk 45 and a floppy disk 47.

The CRT 41 is for displaying axis position and NC operation information and operation keys, and the touch input device 43 is a CR
It recognizes the type of key mounted on the T41 and displayed on the CRT41. An NC machining program for machining is written on the floppy disk 47.

Here, as shown in FIG.
35 is A at 40 mm in the X-axis direction, 30 mm in the Y-axis direction, and at a speed of 3 mm / min.
Consider a case where an NC command to move from point to point B is read from an NC machining program written in a floppy disk 47 and executed. The time interval at which the axis driver 37 responds is 10 msec.
It is assumed that the axis moves by 1 μm with respect to the pulse.

Since the distance from point A to point B is 50 mm,
From the following two equations, the number of output pulses in units of 10 msec in the X-axis direction and the Y-axis direction can be calculated. Note that this calculation is usually completed before starting to execute the NC command.

<X-axis direction speed> <Y-axis direction speed> Since both 0.4 (pulse / 10 msec) in the X-axis direction and 0.3 (pulse / 10 msec) in the Y-axis direction are values of 1 pulse or less, the computer 35 must perform an integer conversion process when outputting to the axis driver 37. No. Further, the computer 35 needs to perform not only the output of the pulse data but also the execution management of the NC operation. Therefore, the following variables are defined inside the computer 35 to cope with execution management and pulse output.

X (out): X-axis output pulse X (mod): X-axis output pulse remainder X (dtg): X-axis remaining movement X (dsp): X-axis coordinate display Y (out): Y-axis Y (mod): The remainder of the Y-axis output pulse Y (dtg): The remaining movement amount of the Y-axis Y (dsp): For displaying the coordinate of the Y-axis Before the execution of the NC, the movement amount of the block is X (dtg) ), Y (d
tg) is set. In this example, X (dtg) = 4000 (pul
se), Y (dtg) = 3000 (pulse).

Since the response time of the axis driver 37 is 10 msec, the computer 35 performs the following calculation for each time cycle.

The values in the X-axis direction 0.4 and the Y-axis direction 0.3 calculated by the above equations (1) and (2) are first added to the variables of X (mod) and Y (mod). If both initial values are 0, X (mod) = 0.
4, Y (mod) = 0.3. Next, X (out), Y
The value of the integer part of X (mod) and Y (mod) is written to (out). This time, both X (out) and Y (out) become 0.

After a lapse of 10 msec, the calculation is performed again. X same as last time
X (mod), Y (mo
d) is added to the variable. X (mod) = 0.8, Y (mod) = 0.
It becomes 6. X to write the integer part of X (mod), Y (mod)
(Out) and Y (out) are again 0 each time.

After a further 10 msec, the calculation is performed again. X (mod) = 1.2 and Y (mod) = 0.9 as in the previous addition. Then, X (out) and Y (out) for writing the integer portions of X (mod) and Y (mod) are such that X (out) = 1 and Y (out) = 0. Therefore, one pulse is output in the X-axis direction. With the output of this one pulse, the following processing is performed for each variable managed in the X-axis direction.

X (mod) = 1.2-1 = 0.2 X (dtg) = 4000-1 = 3999 X (dsp) = current X coordinate value + 1 = new X coordinate value Such processing is repeated every 10 msec, and finally X
When both (dtg) and Y (dtg) become 0, the NC operation of the block ends, the next NC command is read, and the execution moves to the operation to the next block. In practice, in order to smoothly perform the NC operation at the joint in this block, it is general to pre-read several blocks of the NC data and to perform calculations necessary for the operation in advance.

Now, in order to easily and surely perform the interruption interruption work in the NC wire cut electric discharge machine 1, the start switch 39A,
Stop switch 39B and set memory point switch 3
9c is provided. The set memory key 41S and the call memory key 41C are displayed on the CRT 41 only when the wire electric discharge machine 1 is stopped.

When the stop switch 39B is pressed to interrupt the processing, for example, the set memory key 41S and the call memory key 41c are displayed on the CRT 41, so that when the set memory key 41S is touched, the touch input means 43 Informs the computer 33 that the set memory key 41S has been selected.

When the computer 33 recognizes that the set memory key 41S has been selected, the current NC state is collectively displayed as one.
One file 45A is written to the hard disk 45. Various information as shown in FIG. 3, for example, is stored in the NC status file 45A at the time of the interruption.
Such NC states include the pulse output variables described above.

When the set memory key 41S is selected, the current coordinate values of the axes are set as the set memory points in the position file 45B at the time of the interruption of the hard disk 45 in the same manner as the reference point registration of a normal NC device. be registered.

Thereafter, even if the operator resets the NC, the necessary data is written as the files 45A and 45B on the hard disk 45, so that there is no particular problem, and the process can be shifted to the interrupt processing without any change.

To restore the set memory point, set memory point switch 39C provided on the remote control & operation panel 39
By pressing, the location file 45 on the hard disk 45
Each coordinate value at the time of interruption is called from B and returns.

When the call memory key 41C displayed on the CRT 41 is selected and the operator touches the call memory key 41C, the touch input means 43 informs the computer 33 that the call memory key 41C has been selected. Computer 33
Recognizes that the call memory key 41C has been selected,
The NC state data at the time of interruption is read from the NC state file 45A and rewritten.

With the above configuration, the operation of this embodiment will be described with reference to the flowchart shown in FIG. In FIG. 4, in step S1, the remote controller ス タ ー ト start switch 39A of operation panel 39
Press to start normal electric discharge machining. That is, the NC machining program stored in the floppy disk 47 is called by the computer 33, and commands are given to the machining power supply 31 and the axis driver 37 via the interface 35 based on the NC machining program to perform machining.

While performing this processing, if there is no need to perform emergency processing in step S2, the processing is continued as it is, and if it becomes necessary to perform emergency processing, the remote control & operation panel 39 is stopped in step S3. Switch 39B
Press to interrupt the processing.

When the processing is interrupted, the set memory key 41S and the call memory key 41C are displayed on the CRT 41 in step S4. When the set memory key 41S is pressed in step S5, all NC data in the NC state at the
Filed in NC state 45A at the time of interruption at 45. At the same time, in step S6, each coordinate value at the time of interruption is stored in the position file 45B on the hard disk 45.

In this state, the emergency processing is performed, so that the interrupt processing is started in step S7. Steps
In S8, it is determined whether or not the interrupt processing has been completed. If the interrupt processing has not been completed, the processing is further continued. When it is determined that the interrupt processing has been completed, the stop switch 39B is pressed once in step S9, and the set memory point switch 39C is pressed in step S9.
The respective coordinate values at the time of interruption stored in the position file 45B in 5 are read into the computer 33 and automatically returned to the machining interruption point at the time of interruption.

Further, in step S10, when the call memory key 41C displayed on the CRT 41 is touched, the hard disk 45
The NC state at the time of interruption stored in the NC state file 45A at the time of interruption is read into the computer 33, and the same state as when the set memory key 41S is selected appears on the computer 33.

In step S11, in this state, the start switch 39A
By pressing, the continuation of the interrupted machining is started and the machining is ended.

From the above, the machining is interrupted, another interruption machining is performed, and when this interruption machining is completed, in the series of operations for continuing the previous interruption machining, the following effects are obtained in this embodiment. To play.

(A) Since the NC information required when the processing is interrupted is automatically stored by the computer 33, there is no need for a memo as in the related art. In addition, there is no description mistake or omission due to the memo.

(B) Positioning at the machining interruption point can be easily performed. In addition, finer pulse output control than coordinate display is performed.
In NC processing machines, more accurate positioning is possible.

For example, if the coordinate value display is up to 1 μm,
In a processing machine that performs finer control such as 0.1 μm, the accuracy of 1 μm or less is uncertain by a method of manually positioning while watching the coordinate display.

(C) When resuming interrupted machining, it is possible to start resuming NC operation from an accurate place.

For example, if the coordinate value display is up to 1 μm,
In a processing machine that performs finer control such as 0.1 μm, a method of searching for an interruption position by a dry run of a machine lock while observing the coordinate display makes the accuracy of 1 μm or less uncertain. Also, variables such as the remainder of the output pulse do not usually appear on the surface, and cannot be noted. It is also a feat to stop running NC at that point, even if you make notes.

(D) A series of processes of interrupted rework can be performed in a short time.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the present embodiment, for example, an NC wire-cut electric discharge machine has been described as an NC machine.
Other NC machines such as laser machines are also available.

[Effects of the Invention] As can be understood from the above description of the embodiment, in short, the present invention provides a display device (NC) which is operated under the control of a computer (33) provided in an NC device. 41)
The configuration is such that the key for set memo (41S) and the key for call memo (41C) are displayed only when the NC processing machine is interrupted, and the current NC state can be changed by touching the set memo key (41S). An NC status file (45A) for storing and a position file (45B) for storing current axis coordinate values are stored in the NC status file (45A) by touching the call memo key (41C). The NC status at the time of interruption is read into the computer (33), and the set memory point switch (39
Pressing (C) causes the computer (33) to display each coordinate value at the time of interruption stored in the position file (45B).
And automatically returns to the processing interruption point when the operation was interrupted.

According to the present invention having the above configuration, a key for set memo is provided.
The 41S and the call memo key 41C are displayed on the display device only when the NC processing machine is interrupted.By touching the set memo key 41S, the current NC state is stored in the NC state file 45A. In addition, each axis coordinate value is stored in the position file 45B.

Therefore, in the normal state, the current NC state is not stored in the NC state file 45A and each axis coordinate value is not stored in the position file 45B,
Computer load can be reduced and NC
When the processing machine is interrupted, the current NC state and each axis coordinate value can be automatically stored.

As described above, the set memo key 41S and the call memo key 41C are displayed on the display device only when the NC processing machine is interrupted, so it is sufficient to be conscious only when interrupting or reworking. Is a good one. And
When the interrupted machining is restarted, re-machining can be started from the exact position where the interrupted machining has been performed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an NC wire-cut electric discharge machine according to an embodiment for carrying out the present invention, and FIG. 2 is a graph showing, for example, the moving speed of the X axis and the Y axis when moving from point A to point B. FIG. 3 is a diagram showing an example of an NC state file at the time of interruption in which the NC state at the time of interruption is filed. FIG. 4 is a flowchart for explaining the operation of the present invention. 1 NC wire-cut electric discharge machine (NC machine) 9 X-axis motor, 11 Position detector 19 Y-axis motor, 21 Position detector 29 Wire electrode, 31 Machining Power supply 33 Computer 39 Remote control & operation panel 39A Start switch 39B Stop switch 39C Set memory point switch 41 CRT 41S Set memory key 41C Call memory key 43 … Touch input means 45… Hard disk 45A… NC status file at the time of interruption 45B… Position file

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23Q 15/00 G05B 19/4067 B23H 7/20

Claims (1)

(57) [Claims] 1. A display device (41) provided on an NC machine operated under the control of a computer (33) provided on an NC device,
Key for set memo (41
S) and the key for call memo (41C) are displayed and none
An NC state file (45A) storing the current NC state by touching the set memo key (41S) and a position file (45B) storing the current axis coordinate values are provided.
By touching the call memo key (41C), the NC state at the time of interruption stored in the NC state file (45A) is read into the computer (33), and the set memory point provided on the operation panel (39) is read. Switch (39C)
By pressing, each coordinate value at the time of interruption stored in the position file (45B) is read into the computer (33) and automatically returned to the machining interruption point at the time of interruption. Operation control device in the NC machine.