JPS61111850A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To perform an inspection of NC programs so easily and accurately,, by displaying a tool path, an electrode and a work hole on a CRT display unit in a state of keeping an electric discharge machine stationary intact. CONSTITUTION:The program specified by an input switch 8 is set to a logical circuit 15 and analyzed by an NC program analyzer 14. An NC program checker 13 sets display contents and processes to be displayed on a CRT display unit 34 on the basis of analytic data of the program analyzer 14 and inputs the data required for display into the CRT display unit 34 via a display table 33. A work detail processor 37 analyzes and processes the contents of the NC program for the end and simultaneously makes out the data required for displaying the aiming operation on a CRT screen.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The invention is based on a numerical control program (hereinafter referred to as N (3 programs) created for controlling an electric discharge kneading device).

), that is, the trajectory of the adventure.

By outputting the right to be machined, the hole drilled as a result of the machining, the electrode reference value corresponding to the movement trajectory, or the electrical conditions set in the NC program to the CRT display device, Create 7' (N.

η− It is related to processing shade.

[Prior art]

FIG. 1 is a diagram showing the horizontal punching of a conventional electrical discharge machining apparatus of this type. (1) A machining electrode that faces the Vi workpiece (2) with a predetermined gap and is removably attached to the main shaft of the electrical discharge machining device. A6 (3) fixes and processes the workpiece (2), which is raised and lowered in a predetermined sequence by forward and reverse rotation of a pole screw (4) which is rotationally driven by a servo motor (5). A processing tank containing liquid, this processing tank (3)
It can be freely moved in the X-axis direction and the Y-axis direction by a circumferential DC servo motor (6) and a circumferential Y-axis DC servo motor (7).

(8) is an input switch; C1O is a tape reader that reads the program from the NC tape (9); al) is a storage device that stores the program input from this tape reader αO and outputs data to the logic circuit α; aQ
is the servo control circuit, αη is the servo motor drive circuit.

(to) is a DC power supply, 0 is a switching transistor controlled by a pulse generator 0.1, and this transistor 01 uses the voltage of the DC power supply αm as a predetermined pulse voltage, and This is provided to apply voltage to the electric discharge machining device between the electric clamp for machining (1) and the workpiece (2) via a variable resistor (A). Then, the switching transistor (lI?l) and the pulse force ±2 are used to form the electric discharge machining Wt power supply circuit (l). (5) is the main shaft (a). , ball screw (4)
, a bed that supports the processing tank (3), the X-axis circumferential DC servo motor (6), the Y-axis stone flow servo motor (7), the Z-movement DC servo motor (5), etc., and is placed on the grounded floor surface. vs 1. They are placed in different positions relative to each other. ω9
The table fixed to Keko's bed (Company), the bending machine that was not defeated by the processing tank (3) above, and (7) are simply analyzed by the NC program analysis device α4, which will be described later. Based on the analysis results, each of the servo motors (5), (6), and (7) is driven as fxl, q, and the power supply circuit I! This is a machine port/tsuk switch that allows current to flow to 21J.

G1) is a start switch that sends a start signal when electrical discharge machining is performed according to the NC program set by the logic circuit OQ; (141 is this start switch 0
1) When the start signal is received, the signal from the 9th logic circuit 0 is applied to the N set by this logic circuit
NC program analysis device that analyzes O progera and mu, 3
4 is an analysis table that stores the analysis data created by this NO program analysis device 04, based on the data in ■ on this analysis tape.

Further, processing data is created by a processing data creation device (incorporated), and the data created by this processing data creation device @Kuni is stored in a processing data table.

Conventional electrical discharge machining equipment is configured as described above.
A detailed explanation of the NC program inspection method is as follows. , that is, the inspection of the NC program is performed using this N
The C program is applied to the machine at the time of cutting, and the electrical discharge machining device is operated in the same way as a machining machine.The first thing to do is to set the NO program to the electrical discharge machining equipment, but this As a method, insert the NO program into the NC tape (9), and use the tape reader QGVcN.
of -p (9), or by writing and setting the NC program on the CRT display device (2), or by specifying the program number of the NC program stored in the storage device using the input switch (8). There are ways to do it and then remove it. After setting the NC program in this way, when start '1--al) is pressed, the logic circuit α~ to which the signal was input starts the NC program analysis device α4), and the NC program is analyzed fl, , the results are set in the analysis data table (c) by the N,C program analysis device (4). The data set in the analysis data table ■ in this way is converted into processing data by the processing data creation device (c), and the converted data is used in the processing data table (b). It is made to be.

The nine NC program inspection methods described above are shown in Figure 2 (N
11. After one straight line created when inspecting a C program.
A detailed explanation of b is as follows using a drawing showing data for arc movement.

First, the NC program for arc movement 1 is analyzed by NO program analysis equipment 04, and the data is set in the analysis data table. In this case, a transfer from an NC program that moves by one arc to a move that moves by one arc! I Coordinates of starting point Ps (X
, S, 78), displacement due to disk movement @fi point rP
3” coordinates (xe, ye,), center of arc, q,
When the coordinates of P2 (, Xll IVD) and the arc rotation direction "clockwise" are set as data in the analysis data table bowl.

From this data, the machining data creation device (A) generates the data by dividing arcs A and T of lost arc movement into small arcs between point B and work point O. A large number of continuous arcs are created, namely arcs A, B, EC, and CD. and.

One arc movement data is created for this one small arc. For example, for small arc AB.

The coordinates of the starting point A when moving through this small arc (al
, al ), the locus of the end point B of movement ja tbr , bt
).

The center point (01, 02) of the small arc AB and the rotation direction "
In other words, data for "clockwise rotation" is created. and small arc 1. Even if it is closed to T, the coordinates of the start point, end point, and center point and data in one circular arc direction are created.

Even if it is a linear movement, once the start point and end point are set as analysis data in the same way as for the circular movement described above, the machining data creation device (a) compresses this line segment into multiple small line segments and creates the machining data. is configured to create. The tool moves based on a large number of machining data created in this way, and its moving speed is set at the same time in the machining data table.
The command is given based on the command speed Fa (1 minute).

Electrical discharge machining equipment that operates according to the procedure described above
The operator inspects the NC program by observing the operation of [, but if there is an error in the format of the NC program or the size of data set by the NC program, the An error is displayed on the CRT display man. Also, NC
The operator inspects the contents of the program by observing the operation of the electrical discharge machining equipment, but if the machine lock switch (to) is pressed during this inspection, each servo motor ( 5) (6) (7) and power supply circuit e'r
Activate J.

Only the NC program analysis device 0 station and the processing data creation device are operated to display program format errors and errors related to the size of data set by the NC program on the CRT display @ (company). being exposed. Furthermore, when actually operating and inspecting the electrical discharge machining equipment, record paper is set on the table holder fixed to the bed (A), and a pen is attached to the pen mounting poem fixed to the machining tank (3). If this is done, the operation of the tool in the X-Y plane, which is a horizontal plane, can be recorded on the recording paper, and inspection can be performed using this recording.

As mentioned above, with conventional electrical discharge machining equipment, when checking the NC program, the program is inspected while actually operating the electrical discharge machining equipment using this NC program, which not only results in unnecessary work. Not only does it take more time than necessary, but, as shown in the example of circular movement, the movement path is divided into many points and the coordinates of the many divided points are determined to perform one circular movement! E! Configured to convert an I command into a set of movements to a number of coordinate values.
To do so.

It requires a considerable amount of work time, and has the drawback of dramatically reducing program inspection efficiency and the operating volume of the one-shot processing equipment.

Furthermore, when operating the electrical discharge machining device without pressing the machine lock switch (to) and performing an inspection, the workpiece (2) cannot be set on the Y eyelid, and the electrical discharge This is causing a decrease in the operating rate of processing equipment. Even more, press the machine lock switch ω and N
(3) When inspecting a program, there is no other way than to read the tool operation by changes in the coordinate values displayed on the CRT display.
and exceeding the range of data set during the NC program;
It is extremely difficult to discover errors in setting the amount.

[Summary of the invention]

This invention was made with attention to the point that the electric discharge machining apparatus is stationary and the electrode that moves for machining shows a tool trajectory on a CRT display device.

5. By displaying the removed part due to machining, that is, the machined hole. It is an object of the present invention to provide an electrical discharge machining apparatus that allows surface parts to be quickly and accurately inspected by visual inspection of the contents of an NC program.

[Example of modification of invention]

Although FIGS. 3 to 8 all show a simple embodiment of the present invention, the same reference numerals as in the above-mentioned conventional system (FIG. 1) refer to the same structural members, and a portion of the explanation thereof will be omitted.

First, in the block diagram of the electrical discharge machining apparatus according to the present invention shown in FIG. , or an input switch used to operate each device, αQ is a logic circuit that sets a program designated by this input switch (8) and operates each device.

(Foundation) is a CR that displays data set by the operator or specified programs, and output from each device.
T display devices m and an are storage devices that store NC programs and call them when necessary; (to) an NC program inspection device that inspects the NC program set by the logic circuit αO; (141 is this NO program The NC program analysis device (c) is started by the inspection equipment and analyzes the set NC program.
An analysis data table in which analysis data is set by the C program analysis device α4, 03 is a table in which the NC program inspection device α3 converts the data for CRT display @ based on the data set in this analysis data table (goods). The display data table for setting data, (a) is the NC program inspection system @03 when performing NC program inspection.
This is a test start switch for inputting a signal to start up the logic circuit α0.

(C) is a plane-three-dimensional selection dial that selects a plane or three-dimensional display that is set when displaying tool paths etc. on the screen of a CRT display @-; (A) is a dial that displays tt= on the screen according to the NC program. The electrode data setting switch is used to set the shape and size of the electrode when the electrode is used. Create and again NO-y” o-gram inspection device (to)
This is a processing content processing device that delivers the data to.

Since the electrical discharge machining apparatus of the present invention is assembled as described above, prior to the NC program inspection.

First, the inspector inspects the desired NC program as a logic circuit (
to). This setting procedure is exactly the same as the procedure for setting an NC program when performing conventional electrical discharge machining, such as setting a program with NO tape, specifying an NC program in the spare storage device αD, or After setting the NC program in this way, press the inspection start switch (A). Then.

NC programs are automatically checked.

That is, as described above, when the inspection start switch (b) is pressed, the NC program inspection device α3 displays the selected plane or plane on the CRT display device (b) as shown in FIG. 3 for stereoscopic display
Set up dimensional space.

For example, if the X-Y plane is not selected with the plane-solid selection dial (G) in one-plane display, the X-axis (402) and Y-axis
Along with the axis (401), the scale of the axis (40B).

The coordinate values (404) of the display area are displayed, and the center (405) of the screen is set as the drawing start position.

At the same time, some data A to F (406) such as tool coordinate values, electrical conditions, and the name of the program being inspected are also displayed in the corner of the screen. After completing fishing preparations in this way, when the NO program analysis device α station is started, this N
O program analysis device α is 1' for 1 block, IC
Create program analysis data.

After setting the data in the analysis data table (goods).

A signal indicating the end of analysis is input to the NC program inspection device α3. As a result, the inspection equipment α gull will be NO PRO.

Convert the data for the CRT display @ (b), set the data in the 1 display data table (to), and start the CRT display (b). This data conversion work is uniquely suited for CRT display (
b) It can be completed quickly and accurately with a simple task of simply rearranging the data and creating a single piece of data.

The operation described above will be explained in more detail with reference to FIG. In order to display the movement trajectory of the tool according to the NC program for arc movement on the CRT display device, the data that should be set in the display data table by the NC program inspection device 3 for the CRT display device @(B) is as follows. Arc trajectory (501)
In the case of , the starting point coordinates of the arc (X++, YB1)
, the coordinate value of the end point of the arc (XI!, YB).

The center coordinate value of the circular arc (Xe+, YOI) and the circular rotation direction [clockwise J (502), and in the case of the arc locus (F) (1B) with '#I, the starting point coordinate value of one circular arc (
X1t, Y+z).

The end point coordinates of the arc (X113, Yos), the center coordinates of the arc (X6!, '5'i), and the arc rotation direction "counterclockwise J (504)." □ In this way, the NO program analysis device α The data created by → is converted into coordinate values for the CRT display device (b), but the work of converting just one piece of data can be completed in an extremely short time.

The CRT display device c34 displays the arc on the screen almost at the same time as this data is set.

Similarly, in the case of a straight line, the coordinate values of the start point and end point are determined by the NC program inspection technique α3.

Set the data obtained by converting the coordinate value of the end point into the coordinate value for the CRT display device (c) in the display data table device, and input this [Also, the dRT display device IM displays a straight line on its screen, but this work also needs to be done. It can also be completed in a very short time. In addition, when the CRT display is installed, there is no need to wait for a movement completion signal.
The program analysis device 1Q4 can be started.

Furthermore, since it is not affected by the movement speed command written in the NC program or the program specifying the waiting time, all tool trajectories caused by a movement program that slows down the movement speed can be displayed instantly. As shown in Fig. 6, the type of tool movement, i.e., whether it is movement by rapid traverse or movement by speed specification, whether it is movement when stopping when contact is detected, etc. In order to distinguish and display on the CRT display device (c), the types of lines are solid lines (601), broken lines (602), and dashed lines (601).
If data specifying the line type, such as 0B>, is also set in the display data table (to) at the same time, the CRT display device can change the line type and display it based on this data. .

Furthermore, the electrode is set to E condition and electrical discharge machining is performed.
The C program is processed by the NO program inspection device [1 (Ll) and processed by the processing content processing bag @ (B).The data created as a result of processing is displayed in the display data table by the NC program inspection device (to). Based on this, the movement of the electric contact from the machining start position to the machining command position specified by the program is drawn.For example, the two planes in Fig. 7.

Taking the xz plane and xy plane as an example, (701) is an electrode drawn on the xy plane that moves in two directions.

(702) to (714) are electric currents moving in two directions.
is drawn on the xZ plane.

Next, the locus of movement of the electrode during machining and the machining hole will be explained with reference to FIG. 8, taking the two planes of FIG. 7 as an example.

The locus of movement of the electrode during processing is drawn as shown in FIG. 8 (808). Furthermore, the machined holes machined by this movement are drawn as shown by (801) and (802). The machined hole is drawn using the size and shape of tW and the amount of movement of the machining pot.

□When setting a plane or 8-dimensional space for the screen that displays the contents of the NC program as described above, set the plane -
Adjust the 3D selection dial (A) to the desired plane or 8-dimensional space. Each plane is prepared so that any combination of axes can be selected. If the setting is slanted, the plane is automatically set.

If you still want to set the shape and size of the electrode, press the electrode data setting switch (G). Then press the input switch (8) and enter the number corresponding to the shape of the stain and the size of the straight bar. If there is no input, the shape and size will be automatically set to the most common ones.

Furthermore, the CR7 display device (Incorporated) simultaneously displays data, and the various operations described above are repeated until the end of the NC program to display one NC program.

Note that in the first embodiment described above, the NC program is analyzed and displayed one block at a time, and the relationship between analysis and display is as follows: -! Needless to say, the same effect can be obtained even if it is displayed every few blocks or after all blocks have been analyzed. In addition to dimensions and trajectories, it is also possible to simultaneously display data related to machining, such as electrical conditions and feed speed, and the settings of the NC program to be inspected can be set on the screen to be inspected. You can also do that.

Furthermore, the type of trajectory movement may be represented by the type of line or by one color. In addition, the color, shape, and display timing of the machining hole and tW display during machining may be changed.

〔Effect of the invention〕

As described above, according to the present invention, not only program format errors found by conventional inspection methods, but also data range overflow, etc., are revealed by messages from the electrical discharge and processing equipment, just as in the conventional method. (, the tool movement trajectory by the NC program is OR'I
'The NC program is displayed as a line on the display device (c), so it could not be discovered from the numbers displayed on the CRT display device alone without operating the electrical discharge machining device as in the past. Errors in content, such as errors in specifying the moving hand and errors in specifying the direction of movement, can now be visually identified. It's a size.

Conventionally, if you do not always keep track of the power supply status, it is the same as moving one mile, so it is difficult to tell whether the electrode is being processed or simply moving, but with this invention, the electrode is processed and Since the machined hole is also drawn, you can see at a glance where the machined hole of any size and shape will be drilled, along with the movement trajectory, and you can easily see detailed contents of the NC program that you would not know unless you actually machined it. Now you can see it in advance.

Conventionally, NC was performed by operating up to the machining data creation wave @(c).
The NC program was inspected by converting the program into a large amount of data required for actual machining, which required a considerable amount of inspection work time and reduced the operating rate of the electrical discharge machining equipment. According to the above, since the NC program inspection device αj is used, the trajectory is instantly displayed on the CR7 display device (incorporated) as soon as the NC program is analyzed.
This has the effect that the NC program can be inspected and processed in an extremely short time.

In addition, since the NC program can be inspected without creating tools or machining tanks, the workpiece can be set up and prepared for machining at the same time as the program is being inspected. This has the effect of significantly improving the operating rate. Furthermore, according to the present invention, since the electric discharge machining apparatus is not operated for program inspection,
Needless to say, it also saves electric energy.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of a conventional electrical discharge machining device.
Figure 2 shows the conventional NC program v! Data drawings for one linear movement and one circular arc movement created during inspection, Figures 3 to 8 (2), all show a large-scale embodiment of the present invention, and Figure 8 shows the configuration of the electrical discharge machining device. Block diagram shown,
FIGS. 4 to 8 are explanatory diagrams of display screens showing the screens of the CR7 display device. In the figure, (1) is the processing electrode, (2) is the workpiece, and (9)
is the NO tape, 00 is the tape reader, (11) is the storage device 5αTen is the NC program inspection device, C4) is the NC program analysis device, C0 is the logic circuit, Qd is the servo control circuit, Q71t″l: servo motor drive circuit, C1) is a power supply circuit, 1'241 is an analysis data tape v, a container is a display data table, an HViCRT display device, and @ is a processing content processing device. Note that the same reference numerals in Figure 1 indicate the same or equivalent parts.

Claims (4)

[Claims] (1) A storage device that stores a large number of NC programs necessary for electric discharge machining, a logic circuit that sets a predetermined machining program from this storage device, and an NC program analysis device that analyzes the NC program selected by this logic circuit. Based on the analysis data of this program analysis device, CRT
An NC program inspection device that sets display contents and display procedures to be displayed on a display device and inputs necessary data for display to a CRT display device via a display data table, and an NC program that performs the intended processing. The apparatus is characterized by being equipped with a processing content processing device capable of analyzing and processing the content of the image data and creating data necessary for displaying the target processing on the CRT screen. Electrical discharge machining equipment. (2) The electric discharge machining apparatus according to claim 1, wherein the NC program inspection apparatus is connected to an inspection start switch for inputting a signal for starting the NC program to a logic circuit. . (3) The electric discharge machining apparatus according to claim 1, wherein an analysis data table for setting analysis data is connected to the NC program inspection apparatus. (4) A patent characterized in that the display data table is provided for setting data converted for a CRT display device by the NC program inspection device based on the data set in the analysis data table. An electric discharge machining apparatus according to claim 1 or 3.