JP2646044B2 - EDM control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an electric discharge machine equipped with a display device, and more particularly to a control device for an electric discharge machine having a dial gauge indicating the state of machine control sequentially in data on the screen of the display device. It is.

[0002]

2. Description of the Related Art FIG. 6 is a schematic diagram showing a conventional electric discharge machine, for example, a die-sinking electric discharge machine and a numerical control device (hereinafter abbreviated as an NC device). In the figure, 1 is an electric discharge machine, 2 is a control device for driving a servo mechanism based on an NC program and machining data, that is, an NC device, 3 is a CRT as a display device, 4 is an operation panel, and 5 is an electric discharge machine 1. A dial gauge attached to the main shaft. FIG. 7 is an explanatory diagram for explaining the relationship between the depth of a processing point and time in a conventional apparatus.

Next, the actual machining operation will be described. The operator performs processing in the following procedure. 1) Conditional jump-up during machining (JUMP U
P) and jump down (JUMP DOWN) are input from the operation panel 4. Here, JUMP UP means a distance up and down of a processing point at a portion a in FIG. 7 and is represented by one notch 200 microns. Also, JUMP DOW
N means the discharging time at the portion b in FIG. 7 and is represented by one notch of 0.25 sec. 2) Start processing. 3) In the electric discharge machine 1, the descent enters from the JUMP UP, and the machining point rises and falls by the distance of the set notch (a portion in FIG. 7 ). 4) When JUMP UP ends, JUMP DOWN
And discharge is performed for the time of the set notch for machining (portion b in FIG. 7 ). At the time of this discharge, a servo mechanism works so as to keep the voltage between the electrode and the work constant to obtain stable machining, and controls the movement of the shaft. When sludge (machining residue) accumulates between the electrode and the workpiece due to electric discharge machining, the axis is controlled so that the electrode and the workpiece are separated. This amount is referred to as a contamination amount. If this amount is large, the state becomes unstable (portion c in FIG. 7 ), and the processing does not proceed well . Therefore, it is necessary to change the JUMP amount or adjust the processing liquid. Action is required.

As described above, the amount of contamination is important data indicating the state of machining, and the operator proceeds with machining while monitoring the amount of contamination with the dial gauge 5 attached to the main shaft of the electric discharge machine 1. To go.

[0005]

A conventional electric discharge machine is:
As described above, since the dial gauge 5 is attached to the main shaft, there are the following problems. B) The dial gauge 5 needs to be mounted and adjusted. B) The worker who is on the NC device 2 side during the work must move to the machine side to see the dial gauge 5, which is inconvenient. C) The hands of the dial gauge 5 touch instantaneously, making it difficult to monitor the state. D) Since the amount of contamination is detected by a mechanical means (dial gauge), the cost is high.

In view of the above, the present invention provides a method of displaying a dial gauge on a CRT of an NC device and diversifying the display method to sequentially monitor the state of machine control on the NC device side. It is an object of the present invention to obtain a control device for an electric discharge machine that can be used.

[0007]

A control device for an electric discharge machine according to the present invention has at least a machine information processing means for processing information of the electric discharge machine and a display device, and performs servo control based on an NC program and machining data. A jump-up / jump-down determining means for determining whether a jump-up operation or a jump-down operation is being performed based on information from the machine information processing means, and outputting a determination result; A processing point position calculation for calculating the maximum value and the minimum value of the processing point position during the jump-up operation based on the jump-up signal from the jump-down determining means and the processing point position information from the servo mechanism, and outputting a calculation result; Means, a jump-down signal from the jump-up / jump-down determining means, and a machining point position from the servo mechanism. A jump-down stable / unstable determining means for determining a stable / unstable state during the jump-down operation based on the information and outputting a determination result; and a jump-down based on the determination result of the jump-down stable / unstable determining means. A jump-down movement amount calculating means for calculating a movement amount from an elapsed time at the time of stability or at an unstable time of jump-down and outputting a calculation result, and a dial gauge indicating a state of machine control in the data on the screen of the display device. Dial gauge circumference setting means for displaying the length of the dial gauge arbitrarily configurable, and the dial gauge circumference set by the dial gauge circumference setting means and the processing point position from the processing point position calculation means. Based on the maximum value and the minimum value, calculate the display range and display position on the dial gauge of the movement amount between the maximum value and the minimum value; Based on the dial gauge circumference and the jump down movement amount from the jump down movement amount calculation means, a display range and a display position of the jump down movement amount on the dial gauge are calculated, and the calculated movement amounts are sequentially calculated. The display device is identifiable in a fan shape based on a jump-up signal from the jump-up / jump-down determining means and a jump-down stable signal and a jump-down unstable signal from the jump-down stable / unstable determining means. And a dial gauge display processing means for giving a command to display for a predetermined time together with the dial gauge.

[0008]

According to the present invention, the jump-up state, the jump-down stable state, and the jump-down unstable state are displayed in a fan shape in a distinguishable manner and sequentially displayed on the display device together with the dial gauge for a predetermined time. N
The machining status of the electric discharge machining can be clearly grasped on the C device side.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 is a configuration diagram showing a control device of an electric discharge machine according to one embodiment of the present invention, FIG. 2 is an explanatory diagram for explaining the relationship between the depth of a machining point and time in this embodiment, and FIG.
FIG. 4 and FIG. 5 are diagrams for explaining the transition of the display of the dial gauge of the CRT at the time of UP or JUMPDOWN.
Is a flowchart for explaining the operation of the present embodiment. In FIG. 1, portions corresponding to those in the related art are denoted by the same reference numerals.

In FIG. 1, reference numeral 1 denotes an electric discharge machine having a servo mechanism 1a, 2 denotes an NC unit, 3 denotes a CRT, 4 denotes an operation panel, and 6 denotes an interface for connecting the NC unit 2 and the electric discharge machine 1.

The NC device 2 is configured as follows.

That is, 7 is a machine information processing means,
It processes information such as programs and machining data, and drives and controls the servo mechanism 1a of the electric discharge machine 1 based on the information.

8 is JUMP UP / JUMP DOWN
JUMP UP operation is being performed based on the processing data information from the machine information processing means 7 or JUMPOW
It is to determine whether the operation is N or not and to output the result of the determination.

Reference numeral 9 denotes a processing point position calculating means.
JUMP from UP / JUMP DOWN determination means 8
Based on the UP signal and the processing point position information from the servo mechanism 1a, the maximum value and the minimum value of the processing point position during the JUMP UP operation are calculated, and the calculation result is output.

Numeral 10 denotes a JUMP DOWN stability / instability judging means. The JUMP DOWN signal from the JUMPUP / JUMP DOWN judging means 8 and the servo mechanism 1a.
Is used to determine the stable / unstable state during the JUMP DOWN operation based on the processing point position information (contamination amount) from, and output the determination result.

Numeral 11 denotes a JUMP DOWN movement amount calculating means.
Is calculated from the elapsed time when JUMP DOWN is stable or when JUMP DOWN is unstable, and the calculation result is output.

Numeral 12 denotes a dial gauge circumference setting means for displaying a dial gauge indicating the state of machine control in the data on the screen of the CRT 3 so that the length of one circumference can be set arbitrarily.

Numeral 13 denotes dial gauge display processing means, which is based on the dial gauge circumference set by the dial gauge circumference setting means 12 and the maximum and minimum values of the processing point position from the processing point position calculation means 9. Calculates the display range and display position on the dial gauge of the amount of movement between the maximum value and the minimum value, or calculates the dial gauge circumference and JUMP DOW
On the basis of the JUMP DOWN movement amount from the N movement amount calculation unit 11, a display range and a display position of the JUMP DOWN movement amount on the dial gauge are calculated, and the calculated movement amounts are sequentially determined as JUMP UP / JUMP DOWN determination means 8. Signal from JUMPUP and JUMP DOWN stable
Based on the JUMP DOWN stable signal and the JUMP DOWN unstable signal from the instability determining means 10, the fan is colored in a fan shape and a command is displayed on the CRT 3 together with the dial gauge for a predetermined time. Also, JUMP DOW
Display range and display position from the N start position to the current JUMP DOWN movement position, and the previous JUMP DO
Look at the overlap between the display range and the display position from the minimum of the WN movement position to the maximum of the current JUMP DOWN movement position. If they do not overlap, make the line segment of the minimum and maximum position of the previous JUMP DOWN movement position into a broken line. Is displayed on the CRT 3.

The processing operation of the apparatus of this embodiment configured as described above is performed in the following procedure. 1) From the operation panel 4, input the length of one circumference of the dial gauge. 2) One circumference of the dial gauge is set by the dial gauge circumference setting means 12. When there is no input, the circumference is 1 mm in accordance with the conventional machine. 3) From the operation panel 4, the conditions for processing JUMP UP, J
Enter UMP DOWN. 3) Start processing. 4) Processing starts from JUMP UP, and the processing point rises and falls by the set notch distance. 5) When JUMP UP ends, JUMP DOWN
And discharge for the time of the set notch for machining.

Next, the operation of the dial gauge display processing of the apparatus of this embodiment will be described with reference to the flowcharts shown in FIGS.

First, as an initial setting, the current JUMP U
The P movement position, the maximum / minimum position of the previous JUMP DOWN movement position, and the current JUMP DOWN movement position are cleared (step 1).

Next, it is checked whether or not machining is in progress (step 2). If machining is in progress, the dial gauge display processing means 13 uses the value of the dial gauge circumference set by the dial gauge circumference setting means 12 as a value. After obtaining (step 3), the amount of movement between the maximum value and the minimum value is obtained based on the maximum value and the minimum value of the processing point position from the processing point position calculation means 9 (step 4). If it is determined that the processing is not being performed, the process ends.

When the processing of step 4 is completed, the dial gauge display processing means 13 then displays whether or not to delete the currently displayed minimum and maximum positions of the previous JUMP DOWN movement position. Judgment is made based on the time (step 5). If a certain time has elapsed, the minimum and maximum positions of the previous JUMP DOWN movement position are deleted (step 6).

If it is determined in step 5 that the certain time has not elapsed, whether the electric discharge machine 1 is currently in a JUMP UP state or not is determined to be a JUMP DOWN state.
If you are in the JUMP UP state,
Even if the fixed time has not elapsed, the processing of step 6 is performed. If the processing is in the JUMP DOWN state, step 13 is executed.
Is transferred to (step 7).

When the processing of step 6 is completed, the dial gauge display processing means 13 sets the JUMP UP movement position in the current dial gauge to the JUMP UP start position (step 8). In this case, JUMP
The UP start position is, as shown by a in FIG. 3, a 12 o'clock position on a clock.

Next, it is determined whether the JUMP UP is rising or falling (step 9). If it is rising, the dial gauge is determined from the current JUMP UP movement position at that time and the ratio of the movement amount to the circumference. The display range and display position above are calculated (step 10). If the display range and display ratio are being lowered, the display range and display on the dial gauge are calculated from the current JUMP UP movement position and the ratio of the movement amount to the circumference. The position is calculated (step 11). Here, the movement amount obtained in step 10 is a JUMUP UP increase amount,
Also, the movement amount obtained in step 11 is JUMP UP
It is the descending amount.

When the display range and display position on the dial gauge are determined in step 10 or step 11,
Next, the dial gauge display processing means 13 causes the CRT 3 to change the color of the displayed arc to blue and to form a sector from the JUMP UP start position to the JUMP UP movement position together with the dial gauge, as shown in FIG. G in FIG. 3)
(Step 12). At this time, if it becomes one or more laps, a concentric circle is displayed for that,
If a predetermined time has elapsed after the display, the control returns to step 2.
Note that a to c and f to h in FIG.
The transition of the display of the dial gauge (data in the screen) of the CRT 3 at the time of P is shown, and a to c and f in FIG.
To h.

Next, at step 7, JUMP DOWN
Is determined, the JUMP DOWN movement position in the current dial gauge is set to the JUMP DOWN start position (step 13), and then the JUMP DOWN is set.
Whether P DOWN is in a stable state or in an unstable state is determined based on the amount of contamination (step 14). If it is determined that P DOWN is in a stable state, the current JU at that time is determined.
The display range and display position on the dial gauge are calculated from the MP DOWN movement position and the ratio of the movement amount to the circumference (step 15), and the color of the displayed arc is set to green. Also, if it is determined that the vehicle is in an unstable state, the current JUMP DOWN movement position at that time,
The display range and the display position on the dial gauge are calculated from the ratio of the movement amount to the circumference (step 16), and the color of the arc of the display is set to red. Here, the movement amount obtained in step 15 corresponds to the processing amount, and the movement amount obtained in step 16 corresponds to the contamination amount.

When the display range and display position on the dial gauge are determined in step 15 or step 16,
Next, the dial gauge display processing means 13 executes JUMP D
The display range and display position from the OWN start position to the current JUMP DOWN movement position, and the previous JUMP
The display range and the display position up to the minimum of the DOWN movement position and the maximum of the current JUMPDOWN movement position are read (step 17), and it is determined whether or not the display range and the display position overlap (step 18). If not, the line segment between the minimum position and the maximum position of the previous JUMP DOWN movement position is displayed as a broken line on the CRT 3 (step 1).
9), JUMP DOWN Start position to current JU
The sector up to the MP DOWN movement position is defined as a sector, and d in FIG.
Alternatively, a predetermined time is displayed as shown by e, i, and j in FIG. 3 (step 20). At this time, if the number of turns is one or more, concentric circles are displayed.

Thereafter, the JUMP displayed in step 20
The DOWN start position and the current JUMP DOWN movement position are updated as the minimum and maximum positions of the previous JUMP DOWN movement position, respectively (step 21).
It is determined whether the process is completed (step 22). If the process is not completed, the process returns to step 2;

Note that d, e, i, and j in FIG. 3 indicate the transition of the display of the dial gauge (data on the screen) of the CRT 3 during the JUMP DOWN, respectively, and d, e, and j in FIG. i and j. That is, d in FIG. 3 is a display when the JUMP DOWN is in a stable state, and the color of the arc is green. Also, e, i, in FIG.
j is a display when the JUMP DOWN is in an unstable state, and the color of the arc is red.

In FIG. 3, the bold line indicates JUMP.
It indicates the minimum or maximum position of the UP movement position. When two thick lines are displayed, it means that the JUMP UP operation is being performed. Further, the thin line indicates that the JUMP DOWN operation is being performed, and the broken line indicates the previous JUMP DOWN operation.
The minimum and maximum OWN movement positions are shown.

Since the display of the dial gauge and the like described above is performed based on information such as the servo mechanism 1a of the electric discharge machine and the NC program and machining data, the servo mechanism 1a has one axis (Z). Axis), the servo mechanism 1a is multi-axis (X, Y, Z)
Needless to say, the display in the case of is also possible.

[0034]

As described above, according to the present invention, a jump-up state, a jump-down stable state, and a jump-down unstable state can be discriminated in a fan shape and sequentially displayed on a display device together with a dial gauge. Since the time is displayed, the cost can be reduced compared to the conventional mechanical dial gauge display, no need to install or adjust the dial gauge, and the status of any axis can be easily monitored. In addition, the machining status of the electric discharge machining can be clearly grasped on the NC device side without difficulty during the operation, and there is an effect that the operation efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining a relationship between a depth of a processing point and time in the embodiment.

FIG. 3 shows JUMP UP and JUMP in the present embodiment.
It is an explanatory view for explaining transition of a display of a dial gauge at the time of DOWN.

FIG. 4 is a flowchart for explaining the operation of the present embodiment.

FIG. 5 is a flowchart for explaining the operation of the present embodiment.

FIG. 6 is a configuration diagram schematically showing a conventional electric discharge machine and a numerical control device.

FIG. 7 is an explanatory diagram for explaining the relationship between the depth of a processing point and time in a conventional apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 EDM 1a Servo mechanism part 2 NC device (control device) 3 CRT (display device) 7 Machine information processing means 8 Jump-up / jump-down determination means 9 Machining point position calculation means 10 Jump-down stability / unstable determination means 11 Jump-down movement amount calculating means 12 Dial gauge circumference setting means 13 Dial gauge display processing means

Claims (1)

(57) [Claims] 1. A control device for an electric discharge machine which has at least a machine information processing means for processing information of the electric discharge machine and a display device, and drives a servo mechanism based on an NC program and machining data. A jump-up / jump-down determining means for determining whether a jump-up operation or a jump-down operation is being performed based on information from the means, and outputting a determination result; and a jump-up signal from the jump-up / jump-down determining means. A machining point position calculating unit that calculates a maximum value and a minimum value of the processing point position during the jump-up operation based on the processing point position information from the servo mechanism, and outputs a calculation result; and the jump-up / jump-down determination unit. Jump-down operation based on the jump-down signal from the controller and the processing point position information from the servo mechanism A jump-down stable / unstable determining means for determining a stable / unstable state in the middle and outputting a determination result; based on a determination result of the jump-down stable / unstable determining means, when the jump-down is stable or when the jump-down is unstable A jump-down movement amount calculating means for calculating a movement amount from the elapsed time of, and outputting a calculation result; and a dial gauge indicating a state of machine control in data in a screen of the display device, and a length of one circumference thereof is arbitrarily set. Dial gauge circumference setting means for allowing display, and a dial gauge circumference set by the dial gauge circumference setting means and a maximum value and a minimum value of the processing point position from the processing point position calculation means. Calculating a display range and a display position of the movement amount between the maximum value and the minimum value on the dial gauge, or A display range and a display position of the jump down movement amount on the dial gauge are calculated based on the jump down movement amount from the pump down movement amount calculation means, and the calculated movement amounts are sequentially determined as the jump up / jump down judgment. A fan shape is identified based on the jump-up signal from the means and the jump-down stable signal and the jump-down unstable signal from the jump-down stable / unstable determination means, and is displayed on the display device together with the dial gauge for a predetermined time. A control device for an electric discharge machine, comprising a dial gauge display processing means for issuing a command.