JPS60213423A - Present position displaying method in wire-cut electric discharge machining device - Google Patents

Abstract

PURPOSE:To facilitate the grasp of the condition of machining, by displaying the general views of electrode paths on the upper and lower surfaces of a workpiece, and as well by displaying the present position of the electrode at the present time with the use of a mark or a line so that the position of the electrode on a tapered surface on machining may be visually idensified. CONSTITUTION:The method of displaying the present position of an electrode in a wire-cut electric discharge machining device is such that indication is made on a display unit for wire electrode paths WUP, WDP on the upper and lower surfaces of a workpiece WK with the use of predetermined data among programmed path data of the upper and lower surfaces of the workpiece WK, data of relatively positional relationship in the heightwise direction among the upper and lower surface of the workpiece WK, an upper guide UG and a lower guide DG, tapered angle data alpha1, alpha2, alpha3 of blocks b1, b2, b3 and vector deviations (u1, v1), (u2, v2), (u3, v3) between the upper and lower surfaces of the workpiece at the block ends. Further, the present position of the electrode upon electric discharge machining may be indicated on the display unit with the use of a mark or a line.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for displaying the current position in a wire electrical discharge machine. The present invention relates to a method for displaying the current position of a wire electric discharge machine in which the current position of a wire electrode is identifiably displayed on a wire electrode path.

<Prior Art> As is well known, a wire electrical discharge machine is a machine in which a wire electrode is stretched between an upper guide and a lower guide, and a discharge is generated between the wire electrode and the workpiece to machine the workpiece. The workpiece is fixed on the table and moved in the X1Y directions along the machining shape by commands from the numerical control device. In case B, if the wire electrode is stretched perpendicularly to the table (workpiece), the machining shape of the upper and lower surfaces of the workpiece will be the same, and the upper guide can be moved in the X and Y directions (U axis, ■ For example, if the upper guide is moved in a direction perpendicular to the direction of movement of the workpiece and the wire electrode is tilted relative to the workpiece, the machining shape of the upper and lower surfaces of the workpiece will not be the same. , so-called taper machining is performed in which the machining surface is inclined.

FIG. 1 is a schematic explanatory diagram of such taper processing, in which a wire electrode WR is stretched between an upper guide UG and a lower guide DG at a predetermined angle with respect to the workpiece WK. Now, let the lower surface PL of the workpiece WK be a program shape (the upper surface QU of the workpiece WK may also be a program shape), set the Taber angle to α, and set the distance from the upper guide UG to the lower surface of the workpiece from the J1 lower guide DG to the lower surface of the workpiece WK. If the distance is S, then
Offset amount d of the lower guide DG with respect to the lower surface PL of the workpiece
1 and the offset amount d2 of the upper guide UG are respectively d = S - tan α + (d/2) d = (J+
S) ・tana-8-tana-(d/2)=
It can be expressed as J-tana-(d/2). Note that d is the processing width. Therefore, for example, if the movement of the upper guide UG on which the wire electrode WR is stretched is controlled so that the offset amounts d1, d become constant according to the movement of the workpiece, wire electrical discharge machining with a constant taper angle can be performed as shown in FIG. can. In addition, in FIG. 2, the dotted line and the one-dot chain line are the passages of the upper guide UG and the lower guide DG, respectively.

Now, when taper machining is performed using such a wire electrical discharge machine, generally speaking, the program path on the lower surface or upper surface of the workpiece, the workpiece thickness T, The deviation vectors (u, , v,) of the upper and lower surfaces of the workpiece at each rough end and the distances J and S are commanded, and machining is performed as commanded based on these data. 3 and 4 are detailed explanatory diagrams of the taper processing method.

In FIG. 3, A, B, C, and D are points of the machining shape (wire electrode path) on the lower surface of the workpiece, and a straight line or arc connecting these points is commanded as the program path.

Then, in program shape 1, the upper guide path is A,
B3, and the path of the lower guide DG is ζ]2. Now, when machining the tapered surface indicated by diagonal lines in FIG. 3, the movement vectors V, .

In the program path, the start point offset vector PL (=AA2) at the start point A of j is known and equal to the end point offset vector at the end of the previous block of the lower guide DG, and the start point offset vector PU (=AA)
is the end point offset vector of the upper guide UG at the end of the previous block, which is also known. Therefore, direct, l1
End point offset vector NL (-BB2) to the lower guide and upper guide at the end point B of lfl13, NU
(=BB3), the lower guide movement vector V, (=
A2B2=AB'), upper guide movement amount vector Vu(
=83B3') can be calculated from the following % formula % (1) (2). Now, the coordinate values of point B2 are parallel to straight line π1 and have offset vectors d, t! Distant straight line A2
B2 can be found as the intersection point of arc B2c2, which is concentric with arc BC and whose radius differs by 4' offset amount d1, and since the intersecting point B is known at the commanded point, the end point offset vector NL to the lower guide (=gB2) is rounded. on the other hand,
The end point offset vector NU up to the upper guide is NU and N
Since the ratio of L is equal to the ratio of pu and PL, it can be determined by the following formula % formula % (3). Next, straight line A, A3 is straight line A
If the points corresponding to point A and point A3 when A2 point reaches point B2 after parallel movement along B are B' and B3, the lower guide movement amount vector Vd and the upper guide movement amount vector vu are respectively ,V,=A2B2=AB+BB'
(1) 'V = B ' B (2) ' If these vectors ■8, ■- are expressed using the start point and end point offset vectors PU, PL, NU, NL, and AB, (1), (2) becomes.

Then, a pulse distribution calculation is performed using the X-axis and Y-axis components (Δx1ΔY) of the lower guide movement vector ■6, and a pulse distribution calculation is performed using the U-axis and V-axis components (ΔU1Δv) of the movement amount vector Vu. A distribution pulse is generated, and the distribution pulse drives the upper guide. By counting up and down the pre-pulse according to the moving direction, the lower guide, in other words, the current position (X, Y) of the wire electrode on the lower guide surface is determined. The relative position of the upper guide with respect to the lower guide (the wire electrode position on the upper guide surface and the lower guide surface Each axial equivalent W deviation U, V) between the wire electrode positions at is obtained.

Now, the current position display of the wire electrode in the conventional method is the lower guide position (x, y) and the upper guide position (U, , V).
It was a digital display.

<Disadvantages of the Prior Art> However, with the method of digitally displaying the wire electrode position, it is not possible to visually determine which tapered surface and in what inclination state the wire electrode is electrically machining. Also, it is better to display the current positions of the wire electrodes on the upper and lower surfaces of the workpiece than to display the current positions of the upper and lower guides, but the conventional method does not display the current positions of the upper and lower guides. This makes it difficult to understand the machining status.

<Objective of the Invention> The object of the present invention is to provide a method for displaying the current position in a wire electrical discharge machine, which allows visually and easily recognizing which taper surface and in which inclined state the In-shaped semi-wire electrode is electrically machining the tapered surface and in which inclination state. It is to be.

Another object of the present invention is to provide a method for displaying the current position in a wire electric discharge machine that can display the position of the wire electrode on the top and bottom of the workpiece.

Still another object of the present invention is to display the wire electrode passage on the upper surface of the workpiece and the lower surface of the workpiece, and to mark the current positions of the upper guide and lower guide during wire electric discharge machining.
Another object of the present invention is to provide a method for displaying the current position in a wire electrical discharge machine, which displays the current position of the wire electrical discharge machine in a way that it can be identified by a straight line and is displayed over the wire electrode path.

Another object of the present invention is to display the wire electrode path on the upper and lower surfaces of the workpiece, and to mark the current position of the wire electrode on the upper and lower surface of the workpiece during wire electrical discharge machining.
Another object of the present invention is to provide a method for displaying the current position in a wire electrical discharge machine, which displays the current position of the wire electrical discharge machine in a way that it can be identified by a straight line and is displayed over the wire electrode path.

<Summary of the Invention> The current position display method in a wire electrical discharge machine of the present invention displays an overall view of the wire electrode passage on the upper and lower surfaces of the workpiece, and also displays the current position of the wire electrode on the upper and lower surfaces of the workpiece or the upper and lower guides. The current position of the wire electrode is displayed in an identifiable manner by a mark or a straight line over the wire electrode path. According to this method, the condition and processing condition of the wire electrode can be easily recognized visually.

<Example> FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are schematic illustrations of a method for displaying the current position of a wire electrode according to the present invention. In Figure 5, points A, B, and C.

D... are points on the machining shape of the lower surface of the workpiece (wire electrode path on the lower surface of the workpiece), and a straight line or arc connecting these points is commanded as the program path WDP. Also, each block b, (i=1.2.3...
) at the taper angle a1 (i=1.2.3...) or the deviation vector (u,, v,) of the upper and lower surfaces of the workpiece at the end of each block (i=1.2.3,...)
is commanded together with the program path, and furthermore, the vertical distance sZ8 from the lower guide to the lower surface of the workpiece, the workpiece thickness T, and the vertical distance Z between the lower guide and the upper guide (see FIG. 6) are also commanded.

Although each vertical distance is specified based on the lower guide, it is not necessarily necessary to use the lower guide as a reference, and it is of course possible to use the upper guide or the lower surface of the workpiece as a reference.

Also, in Fig. 5, points A', B', C', D'
A straight line and a circular arc connecting the ... indicate the machining shape of the upper surface of the workpiece (wire electrode path wup on the upper surface of the workpiece), the dotted line indicates the path locus of the upper guide, and the dashed line indicates the path locus of the lower guide.

Now, the wire electrode path on the lower surface of the workpiece matches the program @WDP, and therefore the wire electrode path on the lower surface of the workpiece can be easily displayed on the display device using the commanded NC program data.

On the other hand, the wire electrode path WUP on the upper surface of the workpiece is lengthened as follows. Now, the coordinate values of point B' on the upper surface of the workpiece of the wire electrode at the end of the first block b1 are a straight line offset by T-tuna from 1 to the command line on the lower surface of the workpiece of the first block b, and a second The command line "t" on the lower surface of the workpiece of block b2 intersects with the straight line L2 which is offset by T-tanα. Also, the coordinate value of the point C' on the upper surface of the workpiece of the wire electrode at the end of the second block b2 is Command straight line opening T-t on the lower surface of the workpiece of 2nd block b2
anα2 offset straight line L2 and third block b3
command arc ♂) on the lower surface of the workpiece T-tana,
, is the intersection with the offset arc ARC. Then, similarly, the current block b and the next block b1+1
By sequentially finding the wire electrode position on the top surface of the workpiece at the end of each block using the command path , the taper angles α1 and αl+1, and the thickness T of the workpiece, the wire electrode path on the top surface of the workpiece is completed. Also, the deviation vector (U,,v,) of the upper and lower surfaces of the workpiece at each block end
When is commanded, it is clear that the wire electrode passage on the upper surface of the workpiece is completely rounded without performing the above calculation. Incidentally, using these position data and the programmed path data on the lower surface of the workpiece, wire electrode path images on the upper and lower surfaces of the workpiece are generated and stored in the screen memory. Similarly, the wire electric potential I on the lower surface of the workpiece at the end of each block
A bus line AA' connecting f and the wire electrode position on the top surface of the workpiece,
Images BB', CC', DD', etc. are generated and stored in the screen memory. In the state described above, if the image information is read from the screen memory and input to the CRT, the wire electrode paths WUP, WDP and each bus line on the top and bottom of the workpiece will be displayed on the display device as shown in Figure 7 or Figure 8. be done.

On the other hand, during wire electrical discharge machining, the current position of the lower guide (X
, Y) and the current position (U, V) of the upper guide relative to the lower guide, and perform the following calculations to
Determine the position of the wire electrode on the lower surface, and mark the position on the lower surface of the workpiece using marks M1 and M2 (see Fig. 7).
Alternatively, the wire electrode paths WUP, WDP are displayed on the upper and lower surfaces of the workpiece by direct $SL (see FIG. 8). Now, the position P of the wire electrode on the top and bottom of the workpiece
Referring to FIG. 6, u(xu, yu) and Pd(xdlyd) are calculated by the following equations. However, the current position of the lower guide DG is (x, y), and the current position of the upper guide UG relative to the lower guide is (U).

■), and the vertical distance from the lower guide to the top surface of the workpiece is 22
(-Z1+T).

xu=U −(Z2/Z) +X (4)y,=v・(
Z2/z) +y (5)xd=U ・(Z, /Z)
+X (6) yd=l (Z, /Z) +Y (7) If the current positions U and V of the upper guide are given in absolute terms rather than relative position deviation data with respect to the lower guide, ( 4) U-XXV-Y is used instead of U and V in formulas (7).

FIG. 9 is a diagram of an apparatus for realizing the present position display method of the present invention. In the figure, 1 is a processor, 2 is a ROM that stores control programs, and 3 is an RA that stores various data.
M14 is an NCC deck reading device for reading NC data from an NC tape (not shown), 5 is a graphic display device, 6 is an operation panel, 7 is a pulse distributor, 8 is an interface circuit, and 9 is a wire electric discharge machine.

The NC data reading device 4 is used to read the NC data and store it in the RAM 3 in advance. In this state, if you operate the switch provided on the operation panel 6 to request the current position display, the processor 1 will change the content i of the built-in register 1a to 1.
Initialize to .

Then, the processor 1 stores the first block b; and the (i + 1)th block b, + stored in the RAM 3.

As described above, the first block b
Position the wire electrode on the top of the workpiece at the end of the wire.

Thereafter, the path data of the first block and the determined wire electrode position on the upper surface of the workpiece are input to the display control section 5a of the graphic display device 5.

Display control unit 5 of graphic display device
a has a computer configuration, and a processing section 5 a-1
, ROM5 a-2, and RAM M-5a-3. When the processing unit 5a-1 receives the above-mentioned data from the processor 1, it uses the input data to generate image information corresponding to the wire electrode passages on the upper and lower surfaces of the workpiece, and stores the data in the RAM.
5a-3, and also generates image information regarding the bus line of the block end and similarly stores it in RAM 5a-3.
Store in 3. After that, the processing device 5a-1 uses the RAM
5 The image information stored in a-3 (image information regarding the wire electrode path and generatrix on the upper and lower surfaces of the workpiece, each consisting of a straight line, a circular arc, a starting point, an ending point, etc.) is transferred one by one to a vector generator. Output to 5b.

The vector generator 5b performs normal linear or circular interpolation calculations using the input image information, and inputs the generated interpolation pulses XP, YP in each axis direction to the address counter 5c. Although not shown, the address counter 5C has an X-axis circumferential address counter and a Y-axis circumferential address counter, and counts the interpolation pulses of each axis, and the screen memory that the X-axis circumferential address counter and Y-axis circumferential address counter instruct each time. Write 1'' in the memory location of CRT 5d. If the image corresponding to the wire electrode path on the work top and bottom surface of the first block and the generatrix of the block end is stored in the screen memory 5d through the processing in -F below, the CRT 5e The stored information is read from the screen memory 5d in synchronization with the deflection of the beam, and the brightness is modulated using the stored information to display the wire electrode path and bus bar on the top and bottom of the work up to the first block on the CRT 5e.

Note that a timing signal for reading stored information from the screen memo IJ 5d and a timing signal for deflecting the beam are output from the timing signal generator 5f. and,
The successive control section 5g reads the stored information from the screen memo 1J5d based on this timing signal, inputs the stored information to the brightness control section 51 via the synthesis circuit 5h, and the brightness control section 51 performs brightness modulation based on the stored information. do. Also, the deflection control section 5 deflects the beam horizontally and vertically in synchronization with the timing signal. Note that 5 is a character generator, 5m is an image memory for storing character images, and 5n is a readout control section.

In parallel with the above image display processing by the graphic display device 5, the processor 1 determines whether the numerical control data (program path data) of the (i+1)th block includes Mo2; indicating the end of the program.

If Mo2; is included, the wire electrode paths on the upper and lower surfaces of the workpieces of all blocks and the busbars at the ends of each block are all stored in the screen memory 5d, and the process ends. Thereafter, by reading the stored information from the screen memory 5d, the wire electrode paths WUP, WDP and the bus line B on the upper and lower surfaces of the workpiece as shown in FIG. 7 or 8 are displayed on the CRT 5e.

On the other hand, if Mo2; is not included, l is updated as i + 1→l, and the above process is repeated until M02; is detected.

As described above, if wire electrical discharge machining is started with the graphic display device 5 displaying the overall view of the wire electrode passages on the upper and lower surfaces of the workpiece, the processor 1 will change 1→l to the first and (i + 1th )
The NC data of the th block is read from the RAM 3 and the well-known wire electric discharge machining process described in the <Prior Art> section is started.

In addition, the pulse distribution process calculates the movement amounts ΔX, ΔY1ΔU, and ΔV to be moved in each axis direction (x, y, u, and v axis directions) during a predetermined 61 seconds using given path data and taper angle. This is performed by inputting the movement amount to the pulse distributor 7 every 61 seconds until the block end is reached.

The current position (x, y) of the lower guide and the current position (U, V) of the upper guide in each axial direction are monitored every 61 seconds by calculating the following equation.

X±ΔX4X Y±ΔY−Y U±ΔU−U V±Δv−+v However, XSY, U, and V are stored in the RAM 3, and the sign in the above equation depends on the moving direction.

As described above, when the wire electrode reaches the block end, the processor 1 updates 1 as i + 1 → i, reads out the NC data of the next block from the RAM 3, and reads Mo2 indicating the program end of the above process. Execute until

On the other hand, the processor 1 uses the current position data x, y, u, and v of each axis stored in the RAM 3 at predetermined intervals in parallel with the above wire electric discharge machining process to calculate (a) the current positions of the upper and lower guides; To display the lower guide position (x, y)
, the position of the upper guide (X+u, y+v) is input into the graphic display device 5, and (b) on the workpiece,
When displaying the current position on the bottom surface, (4) to (7)
), the current position of the wire electrode on the upper and lower surfaces of the workpiece (" u % Y u ), (xd,, yd) is determined,
These are input to the graphic display device 5.

When the current position of the wire electrode is input, the display control unit 5a of the graphic display device 5 displays a predetermined mark image corresponding to the current position on the upper surface of the workpiece or the upper guide from the character generator 5k, as well as the current position on the lower surface of the workpiece or the lower guide. A predetermined mark image corresponding to each is read out and stored at a predetermined position in the screen memory 5m. Incidentally, a plurality of mark images are stored in the character generator 5k, as shown in FIGS. 10(a) to 10(i), for example, and a predetermined mark image is read out and stored in a predetermined location in the screen memory 5m for character images. It is possible to display the mark at any position on the CRT5e by storing the mark at the position . Successive control section 5n
reads stored information from the screen memory 5m in synchronization with the timing signal from the timing signal generator 5f, and inputs this to the brightness control section 51 via the synthesis circuit 5h.

As a result, the current position of the wire electrode on the wire electrode path on the upper and lower surfaces of the workpiece is marked Ml as shown in FIG.
, M2 will be displayed.

From then on, every time a new wire electrode position is input from step 1, the display control unit 5a updates the mark image and its storage position stored in the screen memory 5m, thereby constantly marking the current position of the wire electrode. Display Ml and M2.

Although the above is an example in which the current position of the wire electrode is displayed using a mark, it is also possible to display the wire electrode position using a straight line instead of using the mark. Ta I! C,
In this case, in addition to a screen memory that stores the entire image of the wire electrode passage on the upper and lower surfaces of the workpiece (for example, the screen memory 5d in FIG. 9), a screen memory that stores a straight line image connecting the current positions of the wire electrodes is used. is required. When the current position of the wire electrode is input from the processor 1, the display control unit 5a generates straight line image data connecting the input current positions of the wire electrode and inputs it to the vector generator 5b. 5b executes a linear interpolation calculation based on the linear image data, and outputs the obtained distribution pulses XP and YP to the address counter for the separate screen memory for counting, and the separate screen memory The linear image is stored by sequentially writing 'l'e to the storage location indicated by the counter. The linear image is read out in the same manner and displayed on the CRT 5e superimposed on the overall view of the wire electrode path.

Although the above is a case in which an image of the wire electrode path projected onto the XY plane is displayed on the CRT 5e, control can also be performed to display a perspective view. A case in which a perspective view is displayed will be described below.

FIG. 11 is an explanatory diagram when displaying a perspective view. In the figure, DPS is the display surface of CRT (CRT surface), and BRP is CRT
The origin of the drawing coordinate system (x-y coordinate system) on the surface, whose coordinate values are (Olo), DRP l;L' The origin of the three-dimensional coordinate axis (X-y-1) of the perspective view displayed on the CRT surface The coordinate value is (xolY), and θ is the X axis of the three-dimensional coordinate axes of the perspective view displayed on the CRT screen and the X of the drawing coordinate system.
Angle with the axis (counterclockwise direction is positive based on the X axis)
, β is the angle between the X axis and the y axis of the three-dimensional coordinate axes of the perspective view displayed on the CRT screen. Now, the coordinate values (XpYz z) expressed in the three-dimensional coordinate system are converted into coordinate values (x, y) in the drawing coordinate system using the following equation. Therefore, the three-dimensional coordinate value (X%3'%z), the angles θ, β, and the coordinate value (xolY
o) is given, the graphic display device 5(
In Figure 9), each three-dimensional coordinate value is subjected to conversion processing according to equation (8) to obtain a coordinate value in the drawing coordinate system, and a perspective view is displayed on the CRT screen using the coordinate value in the drawing coordinate system. can.

Now, if the Z-axis coordinate value of the lower guide surface is 0, the three-dimensional coordinate value of the point on the four-gram path (wire electrode path) on the lower surface of the workpiece is (xd, yd, Z,), and the The three-dimensional coordinate values of the point on the wire electrode path are (xu, y, , Z2). however,(
Xl, yd) is the XY plane coordinate value of each point on the lower surface of the workpiece, and (Xu%M,) is the XY plane coordinate value of each point on the upper surface of the workpiece. Also, the three-dimensional coordinate values of the lower guide and the ID are (xlY, O), and the three-dimensional coordinate values of the upper guide are (X+U).

Y+V, Z). Therefore, the above-mentioned angles θ, β and 3 are stored in the RAM 5a-3 of the display control unit 5a in advance.
The coordinate value (xo
, Yo), and input the three-dimensional coordinate values of the wire electrode path and the current position of the wire electrode on the upper and lower surfaces of the workpiece to the display control section 5a, the display control section 5a can process these inputs. For data (8)
At the same time, image data corresponding to the wire electrode path, generatrix, and current position of the wire electrode on the upper and lower surfaces of the workpiece is generated, and a perspective view is displayed on the CRT surface 5e using the image data as shown in FIGS. 12 and 13. Display as shown.

Although the color display was not explained in the above explanation, the well-known color display function of the graphic display device can be used to display the wire electrode passages on the upper and lower surfaces of the workpiece,
Of course, it is possible to display the generatrix, the marks Ml, M, 2, and the straight line SL in different colors. In addition, such colorization is achieved by configuring the image memo IJ5d with three screen memories of red, blue, and periphery, respectively. For example, the wire electrode passage on the upper surface of the workpiece is displayed in red, and the wire electrode passage on the lower surface of the workpiece is displayed in yellow. When displaying each generatrix in blue and displaying the straight line SL indicating the current position of the wire electrode in green, the wire electrode path image on the top surface of the workpiece is stored in the screen memory for red, and the wire electrode path image on the bottom surface of the workpiece is The electrode path image is stored in two screen memories, one for red and one for the periphery.
An image of each generatrix is stored in a blue screen memory, a straight line image indicating the current position of the ear electrode is stored in a peripheral screen memory, and the image is read out from each of these screen memories and placed in a predetermined grid of the color cathode ray tube. Just input it to the electrode.

Further, when the current position of the wire electrode is to be displayed with a green mark, the mark image read out from the screen memory 5m may be input to the peripheral grid electrode of the color cathode ray tube.

<Effects of the Invention> As explained above, according to the present invention, the entire wire electrode passage on the lower surface of the workpiece (machined shape on the lower surface of the workpiece) and the wire electrode passage on the upper surface of the workpiece (machined shape on the upper surface of the workpiece), which are program paths. In addition to displaying the diagram, the current position of the wire electrode is displayed with a mark, or with a straight line connecting the current positions of the wire, so the current position of the wire electrode can be visually identified. It is possible to recognize at a glance which taper surface is being processed by the wire electrode and in what state, making it easier to check or understand the processing status.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic explanatory diagrams of taper machining, Figures 3 and 4 are detailed diagrams of taper machining, Figures 5, 6, and 7.
8 are schematic explanatory diagrams of the method for displaying the current position of a wire electrode according to the present invention, and FIG. 9 is a block diagram of a device for realizing the method for displaying the current position of a wire electrode according to the present invention.
FIG. 0 is an explanatory diagram of a mark image, FIG. 11 is an illustration of the principle of perspective view display, and FIGS. 12 and 13 are explanatory diagrams of examples of perspective view display according to the present invention. WK...work, WR...wire electrode, UG...
・Upper guide, DG... ・Lower guide, WDP...
Wire electrode path (program path) on the lower surface of the workpiece, wup...Wire electrode path on the upper surface of the workpiece 1...Processor, 3...RAM, 5...Graphic device, display device, 5a...・Display control unit, 5d, 5m...Screen memory 5e...CRT,
7...Pulse distributor patent applicant Fanuc Co., Ltd. agent Patent attorney *S Sengansho'' Bud 2 diagram ¥-4S

Claims (7)

[Claims] (1) In a method of displaying the current position of a wire electrical discharge machine that performs taper machining on a workpiece by moving the workpiece relative to the wire electrode and horizontally moving a guide on which the wire electrode is stretched, Program path data on one side of the bottom surface, relative positional relationship data of the workpiece top surface, workpiece bottom surface, top guide, and bottom guide in the height direction, and taper angle data of each block or workpiece top and bottom surfaces at each block end. A wire electrode path on the upper surface of the workpiece and the lower surface of the workpiece is determined and displayed on a display device using predetermined data among the deviation vectors of the workpiece, and the current position during electric discharge machining is identifiably displayed on the display device. A method of displaying the current position in a wire electrical discharge machine. (2) Using each of the above data, taper processing is performed by controlling the relative positions of the upper guide and lower guide with respect to the workpiece, and the current positions of the upper guide and lower guide in the XY plane are monitored, and the upper guide A patent characterized in that the current position of the wire electrode on the upper surface of the workpiece and the lower surface of the workpiece is determined using the current position of the lower guide and the relative positional relationship data of the upper surface of the workpiece, the lower surface of the workpiece, the upper guide, and the lower guide. A method for displaying a current position in a wire electric discharge machine according to claim (1). (3) A current position display method in a wire electric discharge machine according to claim (2), characterized in that the current positions of the upper guide and the lower guide are displayed with marks. (4) Wire electric discharge machining according to claim (1), (2), or (3), characterized in that the current position of the wire electrode on the upper surface of the workpiece and the lower surface of the workpiece is displayed with a mark. How to display the current position on the machine. (5) A method for displaying a current position in a wire electrical discharge machine according to claim (2), characterized in that a straight line is displayed between the positions of the upper guide and the lower guide. (6) A method for displaying a current position in a wire electric discharge machine according to claim (1) or (2), characterized in that a straight line is displayed between the wire electrode positions on the upper surface of the workpiece and the lower surface of the workpiece. (7) The wire according to claim (1) or (2), characterized in that an image showing the wire electrode path and the current position of the wire electrode on the upper and lower surfaces of the workpiece is displayed in a predetermined color. How to display the current position in an electrical discharge machine.