JPS61111855A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To make an inspection of NC programs easy and accurate, by displaying a tool path and a work in an optimum position on a CRT display unit in a state of keeping an electric discharge machine stationary. 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 a series of display contents and processes to be displayed on a CRT display unit 34 on the basis of the analytic data and inputs the data required for display into the CRT display unit 34 via a display table 33. An automatic center coordinate setter 36 calculates a center coordinate value for describing a work, an electrode and its path in a most inspectable point on a screen of the CRT display unit 34, and delivers the center coordinate value obtained by this calculation to the NC program checker 13.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to the contents of a numerical control program (hereinafter referred to as an NC program) created for flil control of a family IF7111 equipment, that is, Movement trajectory.

Compatible with movement trajectory! 8 seats a + qm, or the electrical conditions that are not set in the No program, or the workpiece to be machined by this NC program, the electrode that is the tool for machining the workpiece is automatically displayed on the CRT display. The present invention relates to an electrical discharge machining apparatus that enables easy and accurate inspection by full visual inspection to determine whether or not an NC program created by outputting to an optimal position performs a predetermined machining process.

[Prior art]

FIG. 1 is a block diagram showing the structure of a conventional VWl processing equipment of this type. (1) is a machining tool that faces the workpiece (2) with a predetermined gap and is attached to the main shaft (a) of the electrical discharge machining device (VCwC).
It is raised and lowered at a predetermined speed by forward and reverse rotation of a ball screw (4) which is rotationally driven by a Z-axis motor (5). (3) The above workpiece (2
) is fixed and contains machining fluid. It is configured to move freely in the axial direction. (8
) is an input switch, a tape reader that reads the program of No. 00 tape (9), and al) is this tape reader that stores the program input from 0I.

1 circuit αυ is a storage device that outputs data, 06 is a servo control circuit, 0η is a servo controller drive circuit, 0 is a servo motor drive circuit, 0 is a pulse generator (a), and is turned on by a pulse generator (a).
This transistor OI is a switching transistor controlled by 0FFJ, and this transistor OI uses the voltage on the DC power supply plane as a predetermined pulse voltage to apply the processing ff, l'l (1
) and the workpiece (2) through the variable resistor (a).

It should be noted that this variable resistor, the switching transistor OI, and the Varnu generator (a) constitute a power supply circuit for electrical discharge machining (al). The handle is the main shaft (c) above, the pole screw (4), and the 77rl tank (3).
).

It supports the X-axis direct current servo motor (6), the Y-axis direct current servo motor (7), the two-axis direct current servo motor (5), etc. relative to the grounded floor surface. It is designed not to change its position. 2) is a table fixed to this bed holder, and the holder is a ben sprayer not attached to the above-mentioned processing tank (3). 5)
(6) This is a machine lock switch to prevent (7) from being driven and to prevent current from flowing into the t-source circuit. In addition, 01J is a start switch that sends a start signal when performing electrical discharge machining according to an NC program set by a logic circuit (to), (14 is a logic circuit (to) that receives a start signal by this start switch) This logic circuit α3
An NC program analysis device that analyzes the NC program set by (C) is an analysis table that contains the analysis data anvil created by this NC program analysis device αω.Based on the data of this analysis table (C), Further, processing data is created by a processing data creation device, and the data created by this processing data creation wave @(c) is configured to be medically managed in a processing data table. Furthermore, @ is a CRT display device that displays data input by the inspector and data set by the electric discharge machining device on the screen.

Conventional electric discharge machining equipment is configured as described above,
The following is a poem about the inspection method for NC programs. In other words, check the NC program, this N
The C program is run on the machine and the electrical discharge machining equipment is operated in the same way as during machining. The method is to write the NC program to NO tape (9) K: and write N to tape reader Q1.
(How to apply 3 tapes (9), how to write and set f or CRT display device + fiKNC program,
Alternatively, there is a method of setting the NC program stored in the storage device a1) by specifying the program number from the input switch (8). After setting the NC program in this way, when the start signal 6υ is pressed, when the logic circuit α is inputted with all the signals, the NO program analysis equipment 0→ is activated and the No program is analyzed, and the result is No. The program analysis device (4) sets the analysis data tape IL/cause. The data set in the analysis data table (c) in this way is converted into processing data by the processing data creation device t (c), and the converted data is set in the processing data tape ~ (e). I'm being used to it.

The above-described No. program inspection method will be explained in detail with reference to FIG. 2 (a drawing showing data for one linear movement or circular arc movement created when inspecting a No. program).

First, the NC program for one circular arc movement is analyzed by the NC program analysis device 1Q→, and the data is set in the analysis data table (c). In this case, the coordinates (X8
, ys), the coordinates of the movement end point "P3" due to circular movement (xe, ye) 1 The center point of the circular arc P! coordinates (xo, yo
) and arc rotation direction "clockwise" as data in the analysis data table (c).

From this data, the processing data creation system @ (a) divides the arc AJ of the arc movement received in the form of data into small pieces between 8 points and 1 point, and converts 1 arc into small arcs, that is, 1 arc AB 1 circle. 11111 B O, create arc C3'D and a large number of continuous arcs. and.

The durability of one circular arc movement data for this one small arc is poor. For example, regarding the small arc ABVr.

This small arc ABf: coordinates of starting point A when moving (al
, at ), coordinates of the end point B of movement (bl , bt )
, the center point (01, 02) of the small arc AB, and the rotation direction "clockwise" data are created. Flat arc EF, small arc FG, small arc GH, small arc H work.

and small arc 1. For lj, create data for the starting point, end point, and center point (and one circular arc direction).

In addition, even for linear movement of $171K, when the start point and end point are set as analysis data in the same way as for the above-mentioned circular movement, the processing data creation device (c) processes the line segment b into multiple small line segments. I am planning to create a data association. 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 as the command speed Fll (W/
(minutes).

JJThe operator inspects the NC program by observing the operation of the electrical discharge machining device that operates according to the above-mentioned key 110, but the format of the NC program, certain b, is N.
(3) If there is an error in the size of the data set in the program, the NC program analysis device 010 can be used to
(RT display dimming) is displayed. In addition, the inspection of the internal world of the NC program is performed by operating the electric discharge machining device f by -1, but if the machine lock switch (to) is pressed during this inspection,
Each servo motor (fi) (6) (7) and power supply circuit Q
Activate D and press h.

N (3) By operating only the program analysis device α4 and the machining data creation control (c), the CRT display device (to ).Furthermore, when actually operating and inspecting the electrical discharge machining device, the recording paper is set on the table (E) fixed to the bed top, and the machining 111 (3) is displayed.
), if you attach the pen to the pen,
The operation of the tool in the X-Y plane, which is the horizontal fknd, can be recorded on recording paper, and can also be inspected using this recording.

As mentioned above, in conventional electrical discharge machining equipment, when checking the NC program, the program is inspected while actually operating the electrical discharge and 71n machining equipment using this NG-program, which results in unnecessary work as well as unnecessary work.
Not only does it require the time E, but as shown in the example of one circular arc movement, the movement route is divided into many points and the coordinates of the many divided points are determined, and one circular movement command is issued with many coordinates. Because it is configured to convert into a set of fluctuations in the price exchange.

It takes a considerable amount of working time to 114 yen, and has the drawback of reducing the program inspection rate and the operation rate of the electrical discharge machining equipment. Furthermore, when inspecting the electrical discharge machining equipment by operating it without pressing the machine lock switch (to), it is difficult to set the workpiece (2) in all the equipment, which also prevents the electrical discharge machining equipment from being set. This causes a total decrease in the operating rate.

Furthermore, press the machine lock switch (to) and press N.
When inspecting a C program, the tool operation must be
A formatting error in one program, which can be read by a change in the coordinate values displayed on the RT display Ff,
It is extremely difficult to discover errors in specifying the transfer direction other than errors displayed as errors on the CRT display, such as exceeding the range of data set during the NC program, and mistakes in setting the transfer amount. It is.

[Summary of the invention]

This invention was made by focusing on the above point, and the electric discharge machining equipment is kept stationary; the tool trajectory and the workpiece are automatically moved to the optimal position on the CR'I' display device while the electrical discharge machining device remains stationary. The purpose of the present invention is to provide an electrical machining device that allows the contents of an NC program to be visually inspected easily, quickly, and accurately by displaying the contents.

[Embodiments of the invention]

Wg8-FIG. 7 all show an embodiment of the present invention, and since the same reference numerals and constituent members are the same as those of the above-mentioned conventional device (FIG. 1), the explanation thereof will be omitted.

First, in the block diagram of the electric discharge machining apparatus according to the present invention shown in Figure @8, the tape reader (8) reads the program of the opened NC tape (9), and (8) is used to specify the NC program, input data, or each other. The input terminal 1'lθ used when the device is to be used for cropping is a logic circuit that sets/resets the program specified 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 device, al) is a storage device that stores the NC program and calls it when necessary, 03 is an NC program inspection device that inspects the NC program set by the logic circuit OQ, and 04) is this NC program inspection device 0
The NC program analysis device that analyzes the set NC program is activated by the program f'E Analysis'A @04) The analysis data table in which the analysis data is set by TK. Based on the data set in this analysis data table,
A display data table that sets the data converted by the NC program inspection device @03 to the CBT display device attached to the CBT display device. Inspection start switch for input to logic circuit Qi, (to) 1 to be inspected
1 The workpiece/electrode data setting switch where the program inputs the workpiece and electrode to be machined.
This is a center coordinate value setting device that calculates the optimum center coordinate value for setting the screen center of the RT display device (b) to the optimum coordinate value.

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

First, the inspector must examine the NC program he or she wants to inspect using the logic circuit αυ.
Set to . This setting procedure is exactly the same as the procedure for setting the NC program when performing conventional electrical discharge machining.
For example, various means are available, such as setting a program using NC tape, specifying the NC program value in the cross storage device #41), or writing and setting the NO program using an input switch on the CRT display device. All you have to do is set it.

Furthermore, the workpiece and electrodes are set in order to confirm the movement of the t-pole and the relationship between its position and the position of the workpiece on a CRT display device during actual machining. To set the data of the workpiece and electrode.

First, press the work/electrode data setting switch (to). Next, Kasui Fuchi (8), the key person, selects the shape of the electrode for the object to be processed from among several shapes that have not been prepared, and inputs the number corresponding to that shape.

Next, enter each dimension of the shape. When data on the workpiece and electrodes are input, the NC program inspection device i1α transfers these data and dimension/plane information to be set on the screen to the automatic center coordinate value setting device (to). The data sent from the XC program inspection device (kl) to the automatic center coordinate value setting device (to) includes the shape and size of the workpiece, the shape and size of the electrode, the positional relationship data between the workpiece and the electrode, 'wL
These are the coordinate values of the poles. From these data, the locus maw of a predetermined point on the workpiece is calculated. An example of calculating stiffness data and a predetermined coordinate value of a workpiece will be explained with reference to FIG.

That is, in Figure 4, the electrode and the workpiece are shaped like a rectangular parallelepiped, and each side is parallel to each axis. The respective sizes of the electrode and workpiece are electric fence horizontally long (Txe) and vertically long ('rye).
), length 'rze), workpiece horizontal length (Wxe)
, vertical length (Wye), thickness (WzQ), and the positional relationship between the electrode and the workpiece is 1llll in the X-axis direction (SX),
The distance in the Y-axis direction (Sy) and the distance in the Z-axis direction (S2i). Also, w, W (7) tc>O coordinate [tj:X
= (Xtl, 7=(Yt), Z= (zt)
There is.

If a predetermined position of the workpiece is the center of the workpiece, the center coordinate value of the workpiece is X=(Xt+SX).

Y=(Yt+Sy), Z=(Zt+Sz). This coordinate value is sent to the No. program inspection device α as the center coordinate value of the screen. On the other hand, the NC program inspection device 03 calculates a scale value from the input set electrode size, workpiece size, and coordinate system set on the screen. The number of graduations of each coordinate axis output on the scale f [ke screen and the workpiece corresponding to this axis Vr! The length of one scale on each axis is calculated from the length of the birch tree, and the thickest h of the l scale lengths is stored as a scale value. Then, when the inspector presses the test start switch (to), the NC program inspection device *Ql sets the 6 coordinate values and scale values on the screen in the display data table (to) in preparation for the inspection.
Activate the RT display equipment e4. By this 11, CRT
A coordinate system is set on the - side of the display device @ (corporate), in which the center of the workpiece is the center of the screen and the workpiece has a scale value that outputs the largest output on the screen.

Then, the coordinate system set on one screen is, for example, two planes of X-
If there is a Y-coordinate map, as shown in Figure 5, the X-axis (502) and 'Y-axis (FIO
), the calculated scale (508) and the coordinates of the display area fit (Ft041) are displayed on the screen.

Furthermore, the input burnt f-Y S X , S ye S Z
The electrode is also drawn at a predetermined position based on r TXe I force "e, Tze. For example, suppose the w pole of a prism is set at the center of the workpiece on the X-Y plane. In the case of input data, it is displayed as shown in (505) in Fig. 5.Also, data such as electrode coordinate values, i! air condition, and NC program under test are displayed.
F (fi06) is also displayed at the corner of the screen.

Then, the NG program inspection system @03 then sets each data of the workpiece in the display data table 8I and performs the second ORT.
Start up the display side I41 and display the workpiece (507) on the screen 73° After completing the preparation in this way, start up the NO program analysis device 04, and this NO program analysis device FQ41 will display 11092 minutes. After creating the analysis data of the NO program and setting the data in the analysis data table e24, the analysis introduction signal is input to the 2hc program inspection device α-clean. As a result, the NO program inspection device U converts the data to V for the CR1 display device (B),
1 Set the data value in the display data table (g) and display the CRT.
Display techniques [Start H4 meeting. This data conversion work can be done by simply converting circular movement, which required a large number of calculations and creating a large amount of data, as in the conventional method described in [7] above.
The simple task of rearranging and creating one set of data for one display device (goods) can be completed quickly and accurately.

The operations described in 1.1 and 5.1 will be explained in more detail with reference to FIG. In order to display the tool movement trajectory based on the NC program for arc movement on the OR'I' display, the CF
? The data that the NO program inspection device α1 should set in the display data table a for the T display device (incorporated) is the coordinate value of the starting point of the circular cut (Xu, Y+
t), circle [(7) End point coordinates i1 [(Xu, Y+
t), the center position value (Xe+, Yak) of the arc, and the arc rotation direction [clockwise J (602), and in the case of f arc trajectory (60, 1), the starting point coordinate value (XI
2, YN), 'End point of the arc (Xex,
”, raa), center coordinates of the arc Tsukuda (Xllll, Yl
12) fp rotation arc rotation direction "Left 1'ilD J (
6 (14).

In this way, the data created by the No. program analysis device 041 is directly converted into the coordinate f for the caT display button, but since the data is simply converted into one piece of data, it can be done in a very short time. Completed.

CR1 display device (to) When the data is set, the data is displayed on the screen almost at the same time. □, b of 1 dedication line
At the same time, I hit H, first, σ, mom.

The coordinate value of the point is t9C program mail visa;・ is the starting point.

Convert the terminal point V4 electric to the C blind T display device Jiang ← 9 and set the data in the display data table (to).

The CRT display device (incorporated) that inputs this information displays a straight line on its screen, but this task is also completed in an extremely short time. Also, C! When you turn on the RT display device (goods),
You will have to wait for the signal when the movement is complete.

Subsequently, the No program analyzer ata41e can be activated immediately to analyze the next block of the NC program.

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 movement programs that slow the movement speed can be displayed instantly. Also, as shown in Figure @7, the type of tool movement, i.e., whether it is moving by rapid traverse, moving by one block or by specifying speed, and the type b is movement when stopping when contact is detected. The types of lines to be displayed on the 0EIT display device by distinguishing between
) etc., which specify the line type, are also displayed at the same time.
The T display device (b) can display by changing the types of lines.

Furthermore, the CRT display device 04 is simultaneously set with a display data table 1vc showing the main machining electrical conditions.

It can also display tool seating data, NC program blocks that are being displayed, etc., so the various operations described above are repeated until the end of the NC program, and only one NC program is displayed. It is.

In addition, although the above-mentioned [Tage Example] was specifically described in the case where the NC program was analyzed and displayed one block at a time, the relationship between analysis and display is different every block or every few blocks. It goes without saying that the same effect can be obtained even if the information is displayed after all the information has been analyzed. In addition to the trajectory, it is also possible to display processing-related data such as air conditions and feed speed at the same time, and the settings of the NC program to be inspected can be set by setting a setting mechanism on the screen to be inspected. You can also let it stand.

As mentioned above, according to the present invention, not only program format errors found by conventional inspection methods, but also data range overflow, etc. can be detected by T.
! i Not only can messages from the electrical machining equipment be clarified, but tool movement trajectories based on the NC program can be displayed on the CRT.
Since it is displayed as a line on the display device, if you operate the electrical discharge machining equipment as in the past, you can discover the NC program that could not be found only from the numerical values displayed on the CRT display device. Errors in content, such as mistakes in specifying the amount of movement or mistakes in specifying the direction of movement, can now be visually identified. Also.

Previously, the processing data creation device @ (E) was operated to perform NC.
Because the program was converted into a large amount of data required for final machining and the No. program was inspected, a considerable amount of inspection work time was required, reducing the operating rate of the electrical discharge machining equipment. According to this invention, since the NC program inspection device 03 is used, the trajectory is instantly displayed on the CRT display device and the trout at the same time as the NC program is analyzed.
This has the effect that the NC program can be inspected and processed in an extremely short time.

Since the NC program is checked to see if the desired machining can be performed, it is normal to display the entire workpiece on the screen to check. The machining performed by electric discharge machining equipment is almost never mass-produced and is mostly performed on single items, and therefore the shape and size of the workpiece differs depending on the machining process. Therefore, in order to properly output the workpiece on the screen, calculating the center coordinates of the screen and setting the values is a task each time an inspection is performed, but in the present invention.

The center of the workpiece is automatically set as the center of the screen.

Further, since the NC program inspection device sets a scale that allows the workpiece to fit on the screen according to the size of the workpiece, the workpiece is always properly output on the screen, and inspection efficiency can be greatly improved.

In addition, since the No. program can be inspected without operating tools or processing tanks, the workpiece can be set up and prepared for machining while the program is being inspected. This has the effect of significantly improving the operating rate. Furthermore, according to the present invention, since the electrical discharge machining device is operated for program inspection,
It does not mean that it saves energy either.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of a conventional electrical discharge machining device.
Figure 2 shows 1 created when inspecting a conventional NO program.
Data drawing for two linear movement rules and circular movement, @8
Figures 7 to 7 all show an example tube of this invention.
! FIG. 8 is a block diagram showing the configuration of the electrical discharge machining apparatus, and FIGS. 4 to 7 are display screen explanatory diagrams showing the screens of the ORT display device. In meat, (1) is for processing! Birch, (2) is a processed product, (9)
is NOf-f, (1012?-)l -ta, Ql)
tl' listed fl ff1. Ql is the NC program inspection device it, α◆ is the NO program analysis device, (II is the logic circuit, 0. is the servo control circuit, Q'h is the servo motor drive circuit, anr; is the power supply circuit,
(Foundation) is analysis data table, eie-i display data table. (b) is a CRT display equipment, and (to) is an automatic center coordinate value setting device. In addition, the same symbols in each figure indicate the same or corresponding parts. Daikonto Masuo Oiwa (Ha)

Claims (4)

[Claims] (1) A logic circuit that sets a predetermined machining program, an NC program analysis device that analyzes the NC program selected by this logic circuit, and a display on a CRT display device based on the analysis data of the NC program analysis device. An NC program inspection device that sets the display contents and inputs the necessary data for display to the CRT display device via the display data table, and the An electrical discharge machining device characterized by comprising an automatic center coordinate value setting device that calculates a center coordinate value for drawing in a position that is easy to inspect and sends the center coordinate value obtained by this calculation to an NC program inspection device. (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 device. (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.