JPH0550330A - Controller of electric discharge machine - Google Patents

Abstract

PURPOSE:To monitor a machine control state at the side of a numerical control system by forming a jump-up state, a jump-down stable state and a jump-down unstable state into a sector form, and making them so as to be displayed as long as the specified time on a display distinguishably in order together with a dial gauge. CONSTITUTION:A jump up and down judging means 8 judges whether it is jump up or down on the basis of machining data information out of a machine information processing means 7. A machining point position calculating means 9 inputs a jump-up machining point position and both maximum and minimum values into a dial gauge display processing means 13 from the judged result and information of a servo mechanism 1a. In addition, with the judged result to a jump-down stable-unstable judging means 10, an amount of travel being calculated by a travel calculating means 11 is also inputted into the dial gauge display processing means 13. In brief, this display processing means 13 forms information on these data being inputted into a sectoral diagram sorted by color and displays it on a cathode-ray tube 3.

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 for sequentially displaying machine control status on screen data of the display device. 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 NC device). In the figure, 1 is an electric discharge machine, 2 is a controller for driving a servo mechanism based on an NC program and machining data, that is, an NC device, 3 is a CRT which is a display device, 4 is an operation panel, and 5 is an electric discharge machine 1. It is a dial gauge attached to the spindle. FIG. 7 is an explanatory diagram for explaining the relationship between the depth of a processing point and time in a conventional device.

Next, an actual machining operation will be described. The worker performs the processing according to the following procedure. 1) Jump-up conditions for processing (JUMP U
P) and jump down (JUMP DOWN) are input from the operation panel 4. Here, JUMP UP means the vertical distance of the processing point at the portion a in FIG. 5, and is represented by one notch of 200 microns. Also, JUMP DOW
N means the time of discharging in the portion b in FIG. 5, and is represented by one notch of 0.25 sec. 2) Start processing. 3) In the electric discharge machine 1, the descent is entered from the JUMP UP, and the machining point rises and descends by the set notch distance (portion a in FIG. 5). 4) When JUMP UP ends, JUMP DOWN
Then, the electric discharge is performed for the set notch time to perform machining (portion b in FIG. 5). At the time of this discharge, a servo mechanism works to keep the voltage between the electrode and the work constant in order to obtain stable machining, and controls the movement of the shaft. When sludge (machining residue) accumulates between the electrode and the work due to electrical discharge machining, the axis is controlled so that the electrode and the work are separated. This amount is called the contamination amount, and when this amount becomes large, the state becomes unstable (part c in FIG. 5), and the machining does not proceed well. Therefore, the JUMP amount is changed or the machining fluid is adjusted. Treatment is required.

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

[0005]

DISCLOSURE OF THE INVENTION 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) It is necessary to install and adjust the dial gauge 5. (B) It is inconvenient for the worker on the NC device 2 side during the work to move to the machine side in order to see the dial gauge 5. C) The needle of the dial gauge 5 touches in an instant, making it difficult to monitor the condition. D) Since the amount of contamination is detected by mechanical means (dial gauge), the cost is high.

In view of the above points, the present invention displays the dial gauge on the CRT of the NC device and diversifies the display method so that the NC device side can successively monitor the state of machine control. An object of the present invention is to obtain a control device for an electric discharge machine that can be used.

[0007]

A controller of 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 a servo based on an NC program and machining data. In a device for driving a mechanism, a jump-up / jump-down judging means for judging whether the jump-up operation or the jump-down operation is in progress based on the information from the machine information processing means and outputting the judgment result, and the jump-up Calculation of 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 determination means and the processing point position information from the servo mechanism, and the calculation result is output. Means, a jump-down signal from the jump-up / jump-down determination means, and a machining position from the servo mechanism. Jump down stability / unstable judgment means for judging the stable / unstable state during the jump down operation based on the information and outputting the judgment result, and jump down based on the judgment result of this jump down stable / unstable judgment means A jump-down movement amount calculating means for calculating the movement amount from the elapsed time during stable or jump-down instability, and outputting the calculation result, and a dial gauge indicating the state of machine control in the screen data of the display device. Dial gauge circumference setting means for displaying the length of the dial gauge, and the dial gauge circumference set by the dial gauge circumference setting means and the machining point position from the machining point position calculating means. Based on the maximum value and the minimum value, the display range and the display position of the movement amount between the maximum value and the minimum value on the dial gauge are calculated, and Based on the dial gauge circumference and the jump-down movement amount from the jump-down movement amount calculating means, a display range and a display position of the jump-down movement amount on the dial gauge are calculated, and the calculated movement amount is sequentially calculated. The display device is fan-shaped and identifiable based on the jump-up signal from the jump-up / jump-down determination means and the jump-down stability signal and the jump-down unstable signal from the jump-down stability / unstable determination means. And a dial gauge display processing means for issuing a command to display the dial gauge for a predetermined time.

[0008]

In the present invention, the jump-up state, the jump-down stable state, and the jump-down unstable state are fan-shaped so that they can be sequentially displayed together with the dial gauge for a predetermined time so that they can be identified. N
The machining status of electric discharge machining can be clearly understood on the side of the C device.

[0009]

The present invention will be described below with reference to the illustrated embodiments.
FIG. 1 is a configuration diagram showing a control device of an electric discharge machine according to an 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. 3 is its JUMP.
Explanatory drawing for explaining the transition of the display of the dial gauge of the CRT at the time of UP and JUMP DOWN, FIG. 4 and FIG.
2 is a flow chart for explaining the operation of the present embodiment, and in FIG. 1, parts corresponding to the conventional ones are given the same reference numerals.

In FIG. 1, 1 is an electric discharge machine having a servomechanism 1a, 2 is an NC device, 3 is a CRT, 4 is an operation panel, and 6 is an interface for connecting the NC device 2 and the electric discharge machine 1.

The NC device 2 is constructed as follows.

That is, 7 is a machine information processing means, and NC
Information such as a program and machining data is processed, and the servo mechanism 1a of the electric discharge machine 1 is drive-controlled based on the information.

8 is JUMP UP / JUMP DOWN
JUMP UP is in operation based on the processing data information from the machine information processing means 7 or JUMP DOWN.
It is determined whether or not N operation is in progress, and the determination result is output.

Reference numeral 9 is a processing point position calculating means, which is a JUMP.
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.

Reference numeral 10 denotes a JUMP DOWN stable / unstable determination means, which is a JUMP DOWN signal from the JUMPUP / JUMP DOWN determination means 8 and the servo mechanism 1a.
Based on the machining point position information (contamination amount) from, the stable / unstable state during the JUMP DOWN operation is determined and the determination result is output.

Reference numeral 11 is a JUMP DOWN movement amount calculating means, which is a JUMP DOWN stable / unstable judging means 10.
Based on the result of the determination, the moving amount is calculated from the elapsed time when the JUMP DOWN is stable or when the JUMP DOWN is unstable, and the calculation result is output.

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

Reference numeral 13 is a 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 calculating means 9. , Calculate the display range and display position on the dial gauge of the movement amount between the maximum value and the minimum value, or dial gauge circumference and JUMP DOWN
The display range and the display position of the JUMP DOWN movement amount on the dial gauge are calculated based on the JUMP DOWN movement amount from the N movement amount calculation means 11, and the calculated movement amount is sequentially determined by the JUMP UP / JUMP DOWN determination means 8 JUMPUP signal from JUMP DOWN stable
Based on the JUMP DOWN stable signal and the JUMP DOWN unstable signal from the instability determination means 10, the CRT 3 is instructed to display the color on the CRT 3 together with the dial gauge for a predetermined time. Also, JUMP DOW
The display range and display position from the N start position to the current JUMP DOWN movement position, and the previous JUMP DO
Check the overlap between the minimum WN movement position and the maximum display range and display position of the current JUMP DOWN movement position. If they do not overlap, make the line segment between the minimum and maximum positions of the previous JUMP DOWN movement position dashed. To be 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, enter the length of one turn of the dial gauge. 2) The dial gauge circumference setting means 12 sets one circumference of the dial gauge. When there is no input, the circumference is 1 mm, in line with conventional machines. 3) From the operation panel 4, conditions for processing JUMP UP, J
Enter UMP DOWN. 3) Start processing. 4) The machining starts from JUMP UP, and the machining point moves up and down by the set notch distance. 5) When JUMP UP ends, JUMP DOWN
Enter, and discharge and process for the set notch time.

Next, the dial gauge display processing operation of the apparatus of this embodiment will be described with reference to the flow charts 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 processing is in progress (step 2). If processing is in progress, the dial gauge display processing means 13 determines the value of the dial gauge circumference set by the dial gauge circumference setting means 12. After obtaining (step 3), the movement amount 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 calculating means 9 (step 4). If it is determined that the processing is not being performed, the processing ends.

When the processing of step 4 is completed, the dial gauge display processing means 13 then displays the information indicating whether to erase the minimum and maximum positions of the previous JUMP DOWN movement position currently displayed. Judging by time (step 5), if a certain time has elapsed, the minimum and maximum positions of the previous JUMP DOWN movement position are erased (step 6).

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

When the processing of step 6 is completed, the dial gauge display processing means 13 next sets the JUMP UP moving 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 the 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 moving position at that time and the ratio of the moving amount to the circumference. Calculate the display range and display position above (step 10), and if it is descending, display range and display on the dial gauge from the current JUMP UP movement position at that time and the ratio of the movement amount to the circumference. The position is calculated (step 11). Here, the amount of movement obtained in step 10 is the amount of increase in JUMPUP,
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 obtained in step 10 or step 11,
Next, the dial gauge display processing means 13 makes the color of the displayed arc blue on the CRT 3, and makes a fan shape from the JUMP UP start position to the JUMP UP movement position together with the dial gauge, and b (or b in FIG. 3). G in FIG. 3)
Is displayed for a predetermined time (step 12). At this time, if there are more than one lap, display concentric circles for that,
After the display, if a predetermined time has passed, the control is returned to step 2.
Note that a to c and f to h in FIG. 3 are JUMP U, respectively.
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.
Corresponds to ~ h.

Next, in step 7, JUMP DOWN
If it is determined that the JUMP DOWN movement position in the current dial gauge is set to the JUMP DOWN start position (step 13), then the JUM
Whether P DOWN is in a stable state or an unstable state is determined by the contamination amount (step 14). If it is determined that the P DOWN is in a stable state, the current JU at that time is determined.
The display range and the 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 arc of the display is set to green. Further, if it is determined that the state is unstable, the current JUMP DOWN movement position at that time,
The display range and 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 obtained in step 15 or step 16,
Next, the dial gauge display processing means 13 uses the 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 minimum of the DOWN movement position and the maximum display range and display position of the current JUMP DOWN movement position are read (step 17), and it is determined whether or not these display ranges and display positions overlap (step 18). If not, after displaying the line segment of the minimum position and the maximum position of the previous JUMP DOWN moving position as a broken line on the CRT 3 (step 1
9), JUMP DOWN Start position to current JU
A fan shape is formed up to the MP DOWN movement position, and d in FIG.
Alternatively, it is displayed for a predetermined time as indicated by e, i, j in FIG. 3 (step 20). At this time, if the number of turns is one or more, concentric circles are displayed for that amount.

Then, the JUMP displayed in step 20 is displayed.
The DOWN start position and the current JUMP DOWN movement position are updated as the minimum position and the maximum position of the previous JUMP DOWN movement position, respectively (step 21),
If it is finished (step 22), if it is not finished, the process returns to step 2, and if it is finished, the process is finished.

Note that d, e, i, and j in FIG. 3 show the transition of the display of the dial gauge (in-screen data) of the CRT 3 at the time of JUMP DOWN, and d, e, and i in FIG. 2 respectively. It corresponds to 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. In addition, e, i,
j is a display when the JUMP DOWN is in an unstable state, and the color of the arc is red.

Further, in FIG. 3, the thick line is JUMP.
It indicates the minimum position or the maximum position of the UP movement position, and when two thick lines are displayed, it means that the JUMP UP operation is in progress. The thin line means that the JUMP DOWN operation is in progress, and the broken line shows the previous JUMP D.
The minimum position and the maximum position of the OWN movement position are shown.

Since the display of the dial gauge and the like described above is performed based on the servo mechanism unit 1a of the electric discharge machine and the information such as the NC program and machining data, the servo mechanism unit 1a has one axis (Z axis). (Axis), the servo mechanism section 1a has multiple axes (X, Y, Z)
It goes without saying that the display in the case of is also possible.

[0034]

As described above, according to the present invention, the jump-up state, the jump-down stable state, and the jump-down unstable state are fan-shaped so that they can be discriminated from each other on the sequential display device together with the dial gauge. Since the time is displayed, the cost can be reduced compared to the conventional mechanical dial gauge display, there is no need to install or adjust the dial gauge, and the status of any axis can be easily monitored. The working state of the electric discharge machining can be clearly grasped on the side of the NC device without difficulty during the work, and the working efficiency is improved.

[Brief description of drawings]

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

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

FIG. 3 shows JUMP UP and JUMP in this embodiment.
It is explanatory drawing for demonstrating the transition of the display of the dial gauge at the time of DOWN.

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

FIG. 5 is a flow chart for explaining the operation of this 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 device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric discharge machine 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)

[Claims] 1. A control device for an electric discharge machine, which has a machine information processing means for processing at least information of an 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 judging means for judging whether the jump-up operation or the jump-down operation is in progress based on the information from the means, and outputting a judgment result; and a jump-up signal from the jump-up / jump-down judging means. A processing point position calculating means for calculating the maximum value and the minimum value of the processing point position during the jump-up operation based on the processing point position information from the servo mechanism and outputting the calculation result, and the jump-up / jump-down determination means. Jump-down operation based on the jump-down signal from and the machining point position information from the servo mechanism. When a jumpdown is stable or a jumpdown is unstable, based on the result of this jumpdown stability / unstable determination means The jump-down movement amount calculating means for calculating the movement amount from the elapsed time and outputting the calculation result, and the dial gauge indicating the state of machine control in the data in the screen of the display device, the length of one round is arbitrarily set. Dial gauge circumference setting means for enabling display, based on the dial gauge circumference set by the dial gauge circumference setting means and the maximum and minimum values of the machining point position from the machining point position calculating means. Then, the display range and display position of the movement amount between the maximum value and the minimum value on the dial gauge are calculated, or the circumference of the dial gauge and the jitter are calculated. Based on the jump-down movement amount from the pump-down movement amount calculating means, the display range and display position of the jump-down movement amount on the dial gauge are calculated, and the calculated movement amount is sequentially determined as the jump-up / jump-down determination. Based on the jump-up signal from the means, the jump-down stability signal and the jump-down stability signal and the jump-down instability signal from the jump-down stability / unstable determination means, the display device is displayed together with the dial gauge for a predetermined time so as to be discriminable. A control device for an electric discharge machine, comprising: dial gauge display processing means for issuing a command.