JPH0373224A - Method for measuring wire guide span and method for realizing vertically wire electrode in wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To realize accuracy the vertically in an extremely short time by calculating a distance between upper and lower wire guides and a vertically realizing gauge to utilize positional data obtained for such calculation for data to realize the verticality. CONSTITUTION:One wire guide 2 is located sequentially in four positions and a workpiece mounting bed 10 is moved in every location of the wire guide to obtain a position where a verticality realizing gauge 40 makes contact with a wire electrode 1. Then, these positional data, i.e., four positional data of one wire guide 2 and the contact position data of the verticality realizing gauge 40 and wire electrode 1 in each of the four positions are utilized to be added calculatively to a previously measured distance between the upper and lower ends of a detecting surface of said gauge 40 so that a distance between the wire guide 2 and verticality realizing gauge 40 is figured out. The displacement of the wire guide 2 needed to realize the verticality is figured out by utilizing these data through the calculation and the wire guide 2 is moved according to the result figured out to realize high accuracy verticality in a short time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wire-cut electric discharge machine, and in particular, the invention relates to a wire-cut electrical discharge machine, and in particular, a method for quickly and accurately positioning a wire guide so that the wire electrode is perpendicular to the plane of movement of a workpiece. The purpose is to obtain accurate wire guide span data required for the subsequent taper processing through the vertical alignment process.

[Prior Art] In a wire-cut electric discharge machine, the perpendicularity of the wire electrode to the moving plane of the workpiece, which is the reference plane for machining, directly affects machining accuracy and is an extremely important matter. Accurately measuring the distance between the wire guides is essential, along with vertical alignment, in order to accurately perform taber processing.

The following two methods are conventionally known as typical methods for vertically extending wire electrodes of this type. The first method is described in Japanese Unexamined Patent Publication No. 104099/1985, in which a workpiece that can be mounted in two directions, the X-axis and the Y-axis, which are perpendicular to each other, is mounted using a table and a pair of upper and lower wire guides. a moving device for moving one of the two parallel to the X-axis and the Y-axis; Attach a vertical gauge having a second detection surface consisting of two vertical detection pieces, upper and lower. First, to attach the workpiece, place the stand in one direction of the X-axis and place the detection piece on either the upper or lower side of the first detection surface. moves until it makes contact with the wire electrode. When a contact is detected, if the contact is either above or below the detection piece, move the one wire guide parallel to the X-axis in a direction away from the detection piece with which the wire electrode has contacted, or detect the contact. The detection piece is moved a preset minute distance in the direction of contacting the detection piece that was missing. This operation is repeated until the upper and lower detection pieces come into contact with the wire electrode at the same time, and this is also repeated for the Y-axis to complete vertical alignment.

The second method is the method described in Japanese Patent Application Laid-Open No. 1-103229, using the same equipment as the above method, first,
After moving one wire guide parallel to the X-axis and tilting the wire electrode, the workpiece mounting table is moved parallel to the X-axis until one of the upper and lower detection pieces of the vertical gauge comes into contact with the wire electrode. Move in one direction. Then, for mounting the workpiece, the table is moved by a distance d in a direction in which the vertical gauge on the table is separated from the wire electrode, and further, the one wire guide is guided by the wire guide. The wire electrode is moved further away from the vertical gauge by a distance e parallel to the X-axis. Next, for mounting the workpiece, the table is moved in one direction of the X axis until the other of the upper and lower detection pieces of the vertical gauge on the table contacts the wire electrode, and the moving distance f is determined. Then input the above-mentioned distances fid, e, f, the distances a and b between each wire guide and the detection piece near it, and the upper and lower detection values measured in advance. In this method, the moving distance required to vertically move the initially moved wire guide is calculated from the distance W between the pieces. (In the above explanation, the terminology described in the publication was not used in order to contrast with the present invention, and substantially the same method was explained using original terms. However, the symbols were used as described in the publication.) [Problems to be Solved] However, the first method is a method in which the wire guide is moved by minute distances and the movement of the wire guide is repeated until the wire electrodes come into contact with the two upper and lower detection pieces at the same time. It takes a lot of time to make the machine vertical, which reduces work efficiency and poses a problem in productivity.

In the second method, the distance W between the upper and lower detection pieces of the vertical gauge and the distances a and b between each wire guide and the detection pieces near it are measured in advance and inputted as machine-specific values. It is a calculation that uses certain things.

However, in a normal wire-cut electrical discharge machine, the upper and lower wire guides are subject to severe wear and must be replaced after a certain period of operation. The distances a and b change slightly. Therefore, the above method of inputting and using the values of a and b as machine-specific values cannot perform accurate vertical alignment, and it is difficult to measure the exact values of a and b. The conventionally proposed method is to perform the process after vertically extending the wire electrode.
It contained fundamental contradictions and was not practical.

Conventionally, in this type of wire-cut electric discharge machine, when performing Taber machining, which is often required, the thickness B shown in FIG.
For a workpiece 50, if the program plane S on which the machining trajectory is commanded is set at a distance p above the table top surface, then in order to perform taper machining at an angle θ on the workpiece, The distance SU in the horizontal direction between the intersection point Q between the programming surface S and the wire electrode 1 and the upper wire guide 2, and the distance SL between the intersection point ○ and the lower wire guide 3 must be determined in advance.

For this purpose, the distance e from the lower wire guide 3 to the workpiece mounting table and the vertical adjustment fj17 of the upper wire guide 2 are
．． When is O, the workpiece is mounted from the upper wire guide 2 to the base 1.
The distance d between the top surfaces of 0, the adjustment amount Z by which the upper wire guide 2 is adjusted up and down for machining, and the distance p between the program plane S and the top surface of the workpiece mounting table 10 are calculated according to the following formula. Calculate.

SU= (d+z−p)−t, anθ−−−・・・−(
1) St, = (e0p) ・tanθ------
-----(2) In the above equation, p is a value h arbitrarily set by the operator, and Z changes depending on the thickness of the workpiece, but this value can be read by the upper wire guide vertical adjustment device. I can do it. However, the above d and e
The value of must be accurately measured each time processing is performed due to dimensional changes due to the use of the upper and lower wire guides and variations in parts.

Hereafter, let d and e above be the true wire guide span, and d
is called the true upper wire guide span, and e is called the true lower wire guide span.

The wire guide spans d and e are the distance a between the upper wire guide 2 and the detection surface end of the vertical output gauge 40 close to the upper wire guide 2 and close to the lower wire guide 3, which will be used in the explanation of the vertical alignment method below. The distance from the edge of the detection surface has the following relationship.

d=a+h+c-z e=b-c Here, h is the distance between the upper and lower detection surface ends of the vertically protruding gauge 40, and C is the lower wire guide 3 of the vertically protruding gauge 40 for mounting the workpiece from the top surface of the table. The height to the edge of the detection surface is close to h, and both values are specific to the vertical alignment gauge 40 used.

Therefore, the values of the wire guide spans d and e of the tool can be easily determined from the values of a and b.

Therefore, in the following description, for ease of explanation, the values of a and b will be referred to as the upper and lower wire guide spans, respectively.

The present invention has been made in order to solve the above-mentioned problems.
can be calculated easily and accurately, and the position data obtained for the calculation is used as data for vertical alignment, so accurate vertical alignment can be completed in an extremely short time.

The present invention provides an improved method in which the values of a and b can be used in calculations for subsequent processing, particularly Taber processing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a workpiece mount on which a workpiece is placed and fixed, relative to a wire electrode, along an X-axis that is orthogonal to each other, A workpiece drive device that moves the workpiece in both directions of the Y-axis, two wire guides that are placed above and below the workpiece and that stretch the wire electrode, and one of the wire guides that moves the workpiece in the U-axis direction parallel to the X-axis. and a wire guide drive device that moves the wire guide in the U-axis direction parallel to the Y-axis, a vertically extending gauge having two mutually orthogonal detection surfaces placed and fixed on the workpiece mounting base, and the detection surfaces and In a wire electrical discharge machine equipped with a detection device that detects contact with a wire electrode, the one wire guide is moved in the direction of one of the two UiV axes by the wire guide drive device, and the wire Two positions uz, u3 sandwiching a plane perpendicular to the wire guide movement direction including a perpendicular line UV-0 to the workpiece mounting table movement plane passing through the guide, and two positions u1, u4 further outside these two positions. in the direction
@Next positioning, and at each positioning time, the workpiece mounting table is moved by the workpiece drive device in a direction parallel to the moving direction of the wire guide among the two axes of the X and Y directions, and The contact positions XX, x2, x3, and x4 between the detection surface of the output gauge and the wire electrode at each of the above-mentioned times are determined, and among the previous positions, u1. The distance Ul between u2 and u
3. From u4 to the distance U3, from the four contact positions x1 and x2 to the distance WI X 1,
Determine the distance x3 from X4, and use those values and the previously measured distance between the upper and lower ends of the detection surface of the vertical gauge to determine the distance between the one wire guide and the vertical gauge near that wire guide. The method is characterized in that the distance a from the edge of the detection surface of the gauge and the distance between the other wire guide and the edge of the detection surface of the vertical gauge near the wire guide are determined by calculation.

In the second invention, the method described above is executed for the other one of the two axes of the one wire guide, and the six values of a and b obtained for the two directions are arithmetic averaged. , are the measurement results of a and b above.

The third invention is a workpiece mounting base on which a workpiece is placed and fixed relative to a wire electrode,
A workpiece drive device that moves in both directions of the X-axis and Y-axis that are orthogonal to each other, two wire guides that are placed above and below the workpiece and that stretch wire electrodes, and one of the wire guides is U axis direction parallel to the axis and U parallel to the Y axis
a wire guide drive device for moving the wire guide in the axial direction; the one wire guide is adjustable in position in a direction perpendicular to a plane of movement moved by the Uiv axis; In a wire-cut electrical discharge machine equipped with a vertically extending gauge that can be placed and fixed and has two detection surfaces orthogonal to each other, and a detection device that detects contact between the detection surface and the wire electrode, the one wire guide is At any vertical adjustment position, the wire guide driving device moves the wire guide in one of the two UiV axes to include the perpendicular line uV-0 to the workpiece mount movement plane passing through the other wire guide. Two positions u2 and u-3 sandwiching a plane perpendicular to the wire guide movement direction and two positions u1 and u4 further outside these two positions are sequentially positioned in one direction, and the workpiece mounting base is positioned at each positioning point. is moved by the workpiece driving device in a direction parallel to the moving direction of the wire guide among the two axis directions of X and Y to determine the contact position of the detection surface of the vertically drawn gauge and the wire electrode at each point in time. Find x1, x2, x3, and
, x2, and the distance X1 between x3. The distance between the one wire guide and the edge of the detection surface of the vertical gauge near the wire guide is determined by the distance x3 between x4 and the previously measured distance Wlh between the upper and lower ends of the detection surface of the vertical gauge. a and the distance between the other wire guide and the edge of the detection surface of the vertically extending gauge near the wire guide are calculated, and then the moving distance of the one wire guide necessary for vertically extending the wire electrode, that is, the distance of the other wire guide is calculated. a perpendicular line uv-o passing through the wire guide to the plane of movement of the workpiece mount;
The distance ti from one position ui among the respective positions uo, u2, u3, and u4 to a plane perpendicular to the wire guide movement direction including
The distance tj = (Ui - ti) from another position uj across the plane containing o and separated by a distance Ui is expressed as the value a, b, h, the distance Ui, and the distance between each contact position. , the distance Xi corresponding to the above-mentioned Ul, and based on the calculation result, the wire guide driving device is driven to vertically move one of the two axes of the Ui. The third invention is one in which vertical alignment of the wire electrode is completed by performing the same process in the other axis direction of the two UiV axes.

A fourth aspect of the present invention is characterized in that the accuracy of vertical alignment is increased by repeating the above method at least twice.

A fifth invention is based on the third or fourth invention, in which the method is measured, calculated, and used in each vertical movement in the U-axis direction and the V-axis direction that was performed immediately before after all the vertical movement operations have been completed. The distance a between one of the wire guides and the edge of the detection surface of the vertical gauge near the wire guide, and the distance d between the other wire guide and the edge of the detection surface of the vertical gauge near the wire guide are each two. This method is characterized in that the arithmetic mean of two values is determined and this arithmetic mean value is used as calculation data for subsequent processing.

Next, a sixth invention is the same wire-cut electric discharge machine as the third invention, in which the one wire guide is moved at an arbitrary vertical position by the wire guide driving device to
A perpendicular line uv to the movement plane of the workpiece mount passing through the other wire guide by moving in one axis direction of the two axes iV
a first step of positioning the workpiece mount at a first position ul sufficiently distant from a plane perpendicular to the wire guide movement direction including -o;
, Y, in a direction parallel to the moving direction of the wire guide, and a second step of determining a first contact position xl between the detection surface of the vertical gauge and the wire electrode using the detection device. and a third step of moving the one wire guide in the same direction as above by the wire guide drive device to position it at a second position ul that is closer to the plane than the first position ul, a fourth step of moving the workpiece mounting base in the same direction as above using the workpiece drive device, and determining a second contact position xl between the detection surface of the vertically extending gauge and the wire electrode using the detection device; a fifth step of positioning the wire guide at a third position u3 remote from a plane perpendicular to the wire guide movement direction including the vertical muV-0 on the opposite side to the second position ul; a sixth step of moving the workpiece mounting base in the same direction as described above by the object driving device, and determining a third contact position x3 between the detection surface of the vertical gauge and the wire electrode by the detection device, and the wire guide. a seventh step of moving the one wire guide in the same direction by a drive device and positioning it at a fourth position u4 farther from the plane than the third position u3, and by the workpiece drive device an eighth step of moving the workpiece mount in the same direction as described above, and determining a fourth contact position X4 between the detection surface of the vertical gauge and the wire electrode using the detection device; , u2, and the distance Ul between u3. The distance U3 between u4, the distance X1 between x1 and X2 of the four contact positions, the distance X3 between x3 and a ninth step of calculating the distances a and b between each of the upper and lower wire guides and the detection surface end of the vertical gauge near each wire guide; The distance of movement of the one wire guide necessary for the vertical alignment of the wire electrode in the same axial direction of the axes, that is, the vertical auv -o of the movement of the workpiece mount through the other wire guide. A distance ti from one position ui of each of the positions tg, u2, u3, and u4 to a plane perpendicular to the wire guide movement direction, or a distance Ui from that one position ui to a plane that includes the vertical auv-0. The distance tj=(Ui−t) from the other first place tZua separated by the numerical values a and b obtained in the first step, the measured value h measured in advance, and the distance U
It and the distance Ui among the distances between the contact positions
The first step is to calculate the distance Xi corresponding to a second process consisting of the first step;
This method is characterized by comprising third and fourth steps in which substantially the same steps as the second step are executed in the other axial directions of the two UiV axes.

A seventh invention of the present invention aims to improve the accuracy of vertical alignment by repeating the first to fourth steps in the sixth invention at least twice.

Furthermore, an eighth invention is a method according to the sixth or seventh invention, in which, in each of the vertically extending steps in the U-axis direction and the V-axis direction, which are performed immediately after the completion of all vertically moving steps,
The measured, calculated, and used distance a between the one wire guide and the edge of the detection surface of the vertical gauge near the wire guide, and the distance a between the other wire guide and the edge of the detection surface of the vertical gauge near the wire guide. The method is characterized in that it includes a step of calculating the arithmetic mean of two values of each distance, and the arithmetic mean value obtained by this step can be used as calculation data for subsequent processing. .

[Function] According to the present invention, the vertical gauge is mounted on a workpiece stand, and the distances a and b between the upper and lower wire guides and the ends of the vertical gauge nearer to each wire guide are determined by one wire guide. are sequentially positioned at the four positions mentioned above, and for each positioning, the workpiece mounting table is moved to determine the contact position between the vertical gauge and the wire electrode, and these position data, that is, the four positions of one wire guide, are Calculate by using the position data and the data of the contact position between the vertical gauge and the wire electrode for each of the four positions, and add to this the distance between the upper and lower ends of the detection surface of the vertical gauge, which has been measured in advance. Then, using these obtained data, calculate the amount of movement of the wire guide necessary for vertical alignment, and move the wire guide according to the calculation result, so it is a short process. Highly accurate vertical alignment can be performed on time. Moreover, according to this method, accurate vertical alignment is always possible without being affected by variations in the shape and dimensions of the wire guide.

Next, the calculation method of the present invention will be explained with reference to FIGS. 4 and 5.

In Fig. 4, the position of the other wire guide is determined relative to the four positioning positions Ui, U2, U3, U4 of the one wire guide and the contact positions x1, x2, x3, X, ↓ of the vertical gauge and the wire electrode. Draw an auxiliary line parallel to the line segment u2-0 connecting U2 and O through h through the ul, and connect this auxiliary line with a line passing through the point ○ and parallel to the line connecting u1 to u4. Letting the intersection point be O゛, and let the intersection point of this auxiliary line and the extension line of x1 to x4 be X'', compare △ul-o-o' and △ul -x' -Xi formed there. The following equation holds.

Ul: (a+h ten b) = DJx Xi):
a Also, the following equation holds true from Δu3-o-u4 and Δx3-○-x4.

U3: (a + b) = X3: b From these,
The following two equations are derived.

a-ul = (01-XI) ・(a ten b)-
(11) U3・b=X3・(a+h+b)・・・・・・
(12) The following equation is derived from the above equation (11).

a=1/Xi (U□-xl)・(h×b)...(1
3) Substituting this (13) into (12), U3・b=
X3·U 1 / X 1 (h + b) Furthermore, the following equation is derived from this equation.

b ” U t・h−X3/ (U3・X I U
l-X 3)...(14) The above formula (13) and (14)
From the equation, the following equation holds true.

a=U3-h・(Ux Xi)/(U3・Xx
Ux・X3)・・・・・・・・・・・・・・・-(15
) As is clear from these equations, the values of a and b can be calculated from the five values of h, Ux = U3, XI, and X3.

Further, with reference to FIG. 5, a method of calculating the amount of movement of one wire guide required for vertical alignment will be explained.

Two positions ui sandwiching the intersection uv between the moving surface of one wire guide and the perpendicular line from the other wire guide O to the moving surface
, uj and the contact position between the vertical gauge and the wire electrode at each position are Xi, Xj, and Zui OtJ
When v is α and Zuj Ouv is β, the distance t from ui to the point uV and the distance Ui between the Ui and ui
And the distance X□ between Xi and X0 can be expressed by the following formula.

t= (a ten b)・j a nα・・・・・・・・・
...(a) Ug =: (a ten b) -tana+
(a 10 b) - tan β - (b)

tan β = [X knee (h - b) - tan al
l bSubstituting this into equation (b), Ui=(a+h+b)(tanα+Xt/b-htan
α/b-tanα) From this, we can further derive the following equation.

t, an α= [(a+h×b)・X4−b−Ui]/(a+h×b)・h By substituting this tan α into the above equation (a), the following equation (d) is obtained.

ti=b・(Xi-Ui)/h0a-Xi/h1Xi・
・・・・・・・・・・・・(d) That is, the four positioning positions of one wire guide necessary for vertically extending the wire electrode, U], u2, u3,
The distance mt from any one ui of u4 to the point uv is
Another position u sandwiching the point uV from the position Ui
, i, the distance Xi between the contact positions Xi, It can be calculated by

As is clear from the above description, the present invention allows one wire guide to be adjusted vertically at any position, even if the wire electrode is not vertically aligned in advance. By sequentially positioning the two positions (four positions in total) and finding the contact position between the wire electrode and the vertical gauge for each positioning, you can detect the upper and lower wire guides and the detection surface of the vertical gauge near each wire guide. The distance to the end can be measured extremely accurately, and the data obtained from this measurement can be used to calculate the data necessary for vertically aligning the wire electrode. Therefore, it is possible to perform vertical alignment relatively easily and accurately. Further, even if the wire guide is replaced, accurate vertical alignment can be performed without being affected by variations in the replaced wire guide.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show a workpiece drive device equipped with an X-axis and a Y-axis that are orthogonal to each other, and one wire guide (upper wire guide 2 in this embodiment) whose vertical position can be adjusted. (This vertical position adjustment device is omitted in the figure), and a wire guide for the wire guide 2 having a U axis parallel to the X axis and an axis parallel to the Y axis. 1 is a diagram showing a schematic configuration of a wire-cut electrical discharge machine having a disturbance device.

For mounting the workpiece, the table 10 has an X-axis motor 11 and a Y-axis motor 1.
2, it is sent in the X-axis direction and the Y-axis direction that are orthogonal to each other, and is movable within the horizontal X-Y plane. X,
The feed mechanism including the Y-axis motor 11.12 constitutes a workpiece drive. Wire electrode 1 is connected to upper and lower wire guides 2
．． The wire electrode 1 is guided by the upper and lower wire guides 2 and 3 and runs in the vertical direction while being given a predetermined tension by a brake roller and a drive roller (not shown). The lower wire guide 3 is fixed at a predetermined position, and the upper wire guide 2 is adjusted in the vertical direction (U to be described later) by a vertical position adjustment device (not shown).
- The position in the direction perpendicular to the V-plane can be adjusted arbitrarily, and can be moved within the horizontal plane parallel to the X-Y plane, the U-V plane, by the U-axis motor 13 and the V-axis motor 14. The feeding mechanism including these UiV axis motors 13 and 14 constitutes a wire guide drive device. The inclination angle of the wire electrode is controlled by the position of the upper wire guide 2 on the U-■ plane.

Each of the UiV axes has a mechanical origin, and sends an origin signal to the NC device at each mechanical origin position. In addition, the reference numeral 6 indicates a detection device, and the reference numerals 7 and 8 indicate a U-axis moving device and a V-axis moving device, respectively, and these devices are provided with a device for repeatedly performing the same type of operation according to input predetermined setting values. A repeater 9 is connected.

Said X, Y, UiV (7) each axis (7) Mo If 11~
14 is connected to the NC device 20, and the NC device is connected to the CPU
21 and a memory 22, and controls each shaft motor 11-14 via controllers 23-26 and drivers 27-30.

On the other hand, the workpiece mounting table 10 has first and second detection planes PL, P which are orthogonal to each other before starting the vertical alignment work.
2 is mounted and fixed, and the detection surfaces PL and P2 are perpendicular to the X and Y axes, respectively. Each detection surface PL of the vertical gauge 40,
P2 is formed with upper and lower detection end faces 45, 46 and 47, 48, respectively.

A detection device 6 that detects contact between the vertically extending gauge 40 and the wire electrode 1 connects the wire electrode 1 via the feeder 15 to each detection end surface 45, 46, 47, .
48, by applying a low voltage of about 5 to 1 oV between the tonneaus, the contact between them is electrically detected by the detection circuit 31.

The CPU 21 uses N stored in advance in the memory 22.
It runs C programs and calculation programs.
Drive the Ui-axis motor and the X, Y-axis motors according to the NC program and input information, store their position information and contact position information based on the detection signal from the detection circuit in the memory 22, and according to the calculation program, Based on this position information and the previously measured distance between the upper and lower detection ends of the vertical gauge, the distance between each wire guide and the detection end surface of the vertical gauge near the wire guide is calculated, and the calculation result is calculated. memory 2
Store in 2.

Next, using this information and calculation results, calculate the travel distance of the upper wire guide required for vertical alignment.
By driving the wire guide drive device according to the calculation result, vertical alignment is completed.

At this time, following the measurement and calculation of the distance (hereinafter simply referred to as wire guide span) between the wire guide and the detection end face of the vertical gauge near it in the U-axis direction as described above, the vertical alignment in the U-axis direction is After that, measure and calculate the wire guide span in the V-axis direction, and then perform vertical extension in the V-axis direction, or vertically extend the wire in both the U-axis and After calculating the guide span, it is possible to determine the average value of the wire guide spans measured for both UiV axes, and then perform the calculation based on the average value, as desired.

FIG. 3 is a flowchart for explaining the above control and calculation.
The vertical feed operation and calculation of the wire cut electric discharge machine of the present invention will be explained based on FIGS. 5 and 6.

N (When a wire guide span measurement command is given to the J machine 20 (step 100), it is determined whether Uivg has been returned to the origin of the machine by t (step to
i) If the mechanical home position has not been returned, a warning will be displayed to prompt the operator to select the home position return mode, or the wire guide drive device will automatically shift to the Ui-axis mechanical home position return mode. When the return to the zero machine origin point is completed, in which the upper wire guide 2 is positioned at the machine origin point by energizing the upper wire guide 2, O is assigned to item j (step 102).

Then, by energizing the disturbance device on one side of the Ui axis, for example, the U axis, the upper wire guide 2 is moved to the position ui + positioning (step 103);
When the positioning is completed, the workpiece mounting table 10 is driven in the X-axis direction (rightward in Fig. 4), and the wire electric [1] is attached to the vertical gauge 40 attached to the workpiece table. When mounting the workpiece at the position Xl in contact with the detection end surface, the table lO is stopped and the position is memorized (step 106).
), then it is determined whether item i is equal to or greater than 1 (step 107), and it is determined whether item i is equal to or greater than 1.
If not, add 1 to item i.Step 1
09), it is determined in step 110 whether item i is equal to 4, and if not, the process returns to step 103 and steps 103 to 106 are executed again. Here, the upper wire guide 2 is positioned from ul to U2,
Further, when mounting the workpiece, the table 10 is moved from the position Xl to the position X2. It is determined again in step 107 whether i is equal to or greater than 1, and if i is 1 or greater than 1, the process moves to step 108.

Here, the following calculation is performed to obtain ui and xi.

Ui :I ui+x ui IXL=l
Xi+l -Xi 1 or more operations are repeated until it is determined in step 110 that the item is mini 4. When it is determined that i=4, the process moves to step 111, and the next data Ul calculated in step 108 up to that point is = l uz −u11' XI = l X?
, X1lU2=lu3 U21 X2=IX3
X21U3=ILI4 U3[X3=lX4
31, UX, U3, XI, 2 to vertical gauge 40
The distance a to the upper surface of the upper detection end surface 45 and the distance s from the lower wire guide 3 to the lower surface of the lower detection end surface are expressed by the above-mentioned equations (14) and (15), that is, b=U1・h-X3/(U3・xl-Ul・x3)・・
(14) a=03-h-(Ul-Xi)/(U3・X
] UrX3) (15) The calculations based on the following two equations are executed, and the values of a and b, which are the calculation results, are stored in the memory 22.

Next, although not directly related to the present invention, after the vertical alignment of the present invention is completed, a workpiece having a thickness of B is mounted on the table 10, and the workpiece is subjected to taber machining as shown in Fig. 6. The data required for this purpose are the distance d from the upper wire guide 2 to the upper surface of the workpiece 50 when the vertical adjustment amount Z of the upper wire guide 2 is 0, and the distance from the lower wire guide 3 to the lower surface of the workpiece 50. e, the vertical position adjustment amount Z of the upper wire guide that has been measured and inputted in advance, the distance lc from the lower surface of the vertical output gauge 40 to the lower surface of the lower detection end surface 46, and the above a calculated in step 111, b
The value is calculated using the following formula (step 112).

d=a+h+c-z e=b-c Next, determine the amount of movement t to move the upper wire guide 2 from any one of the four positions Ui among the four positions U1, U2, U3, and U4 for vertical alignment. □Or, t, 1=(U knee ti)
The process moves to step 113 where . In this step, the calculation of equation (d) as previously explained with reference to FIG. 5 is executed.

t i=b ・(Xi u i) / h 10a −
xi/h + xi・・・・・・・・・・・・・(
d) In addition, if the arbitrary position of the above upper wire guide is selected from one of U3 and U4 instead of one of u1 and U2 in FIG. j
= Calculate the value of (ut - t i).

Next, the process moves to step 114, and the upper wire guide 2 is
ti or tj = (U knee t
The wire guide drive device is energized in order to move the wire guide by a distance of 1.

This completes the vertical alignment of the upper wire guide 2 in the U-axis direction.0 Next, the same process as above is performed in the V-axis direction to complete the vertical alignment of the UiVM axis.

In the above example, a method was shown in which after measuring the wire guide spans a and b in the U-axis direction, the vertical alignment in that direction is performed. Of course, it is also possible to measure a and b in the V-axis direction, find the arithmetic average of these a and b values, and then perform vertical alignment in each axis direction. be.

Also, calculate d and e from the arithmetic mean of the values of a and b above,
The data d and e may be used as data for subsequent taber processing.

Furthermore, in order to check whether or not the above-mentioned vertical alignment has been performed accurately, step 115 is provided in the above embodiment, and the workpiece is mounted on the stand by the workpiece drive device toward the wire electrode that has been vertically aligned. It is confirmed whether the wire electrodes touch the upper and lower detection end surfaces 45 and 46 of the vertically drawn gauge 40 at the same time. If the upper and lower detection end surfaces of the wire electrodes do not contact at the same time, return to step 10'2 againh, and thereafter tg, u2, u
3. It is also possible to repeat the same process by giving a different value to u4. However, according to the present invention, fairly accurate vertical alignment is possible, and therefore this step is not necessarily necessary in practice, so the explanation using a flowchart is omitted.

[Effects of the Invention] According to the present invention, it is possible to measure the distance between each of the upper and lower wire guides and the ends of the upper and lower detection surfaces of the vertical gauge to be used that are close to each wire guide, that is, to measure the guide span. Measurement is performed in a short time, and the data obtained from the measurement is used to calculate the amount of movement of the upper wire guide required for vertical alignment, and the wire guide drive device is operated according to the results. Accurate in a very short time.

It is possible to perform highly accurate vertical alignment, and is useful not only for general machining, but especially as a pre-process for taper machining.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing the configuration of a wire-cut electric discharge machine of the present invention, Fig. 2 is a block diagram mainly showing the configuration of its control device, and Fig. 3 shows the method of the present invention as a processing procedure on a CPU. FIG. 4 is an explanatory diagram illustrating the principle of measuring the wire guide span of the present invention by the operation of the upper wire guide 2 relative to the lower wire guide 3, and FIG. 5 shows the amount of movement of the upper wire guide necessary for vertical alignment. An explanatory diagram explaining the principle of calculation, Fig. 6 is a workpiece 50 of thickness B.
FIG. 3 is a relationship diagram when tapering is applied to In the figure, 1 is a wire electrode, 2 is an upper wire guide, 3 is a lower wire guide, 4 is a workpiece drive device, 5 is a wire guide drive device, 10 is a workpiece mounting table, 11 is an X-axis motor, 1
2 is the Y-axis motor, 13 is the U-axis motor, 14 is the V-axis motor, 20 is the NG device, 21 is the CPUi 22 is the memory h
, 40 is a vertical draw gauge, and 50 is a workpiece having a thickness of B.

Claims (8)

[Claims] (1) A workpiece drive device that moves the workpiece mounting base on which the workpiece is placed and fixed relative to the wire electrode in both directions of the X-axis and Y-axis that are perpendicular to each other, and two wire guides arranged to stretch wire electrodes; and a wire guide drive device that moves one of the wire guides in a U-axis direction parallel to the X-axis and a V-axis direction parallel to the Y-axis. , a vertical gauge having two mutually orthogonal detection surfaces mounted and fixed on the workpiece mounting base;
In a wire-cut electrical discharge machine equipped with a detection device that detects contact between the detection surface and the wire electrode, the one wire guide is moved in the direction of one of the two axes U and V by the wire guide drive device. and two positions u_2 and u_3 sandwiching a plane perpendicular to the wire guide movement direction including a perpendicular line u_v-o to the workpiece mounting table movement plane passing through the other wire guide, and two positions further outside the two positions. The workpiece is sequentially positioned at positions u_1 and u_4 in one direction, and at each positioning point, the workpiece is driven in a direction parallel to the moving direction of the wire guide among the two axis directions of the X and Y directions. The contact positions x_1, x_2, x_3, and x_4 of the detection surface of the vertical gauge and the wire electrode at each time point are determined by moving the device, and the distance U_1 between them is determined from u_1 and u_2 of the previous four positions.
, the distance U_3 between u_3 and u_4, and the distance X_ between x_1 and x_2 of the four contact positions
1, and the distance X_3 between them from x_3 and x_4, and from those values and the previously measured distance h between the upper and lower ends of the detection surface of the vertical gauge, determine the distance between the one wire guide and its wire. A wire cut discharge characterized in that the distance a from the edge of the detection surface of a vertical gauge close to the guide and the distance between the other wire guide and the edge of the detection surface of the vertical gauge close to the wire guide are calculated. How to measure wire guide span in processing machines. (2) The above method is applied to the U of the one wire guide,
Claim (1) characterized in that the measurement results of a and b are obtained by performing the measurement in the other axis direction of the two V axes and arithmetic averaging the respective values of a and b obtained in the two directions. 1) A method for measuring wire guide span in a wire-cut electrical discharge machine. (3) A workpiece drive device that moves the workpiece mounting base on which the workpiece is placed and fixed relative to the wire electrode in both directions of the X-axis and Y-axis that are orthogonal to each other, and two wire guides arranged to stretch wire electrodes; and a wire guide drive device that moves one of the wire guides in a U-axis direction parallel to the X-axis and a V-axis direction parallel to the Y-axis. , the one wire guide is connected to the U, V
a vertically extending gauge whose position is adjustable in a direction perpendicular to a plane of movement moved by the shaft, which can be placed and fixed on the workpiece mounting base and has two detection surfaces perpendicular to each other; In a wire-cut electric discharge machine equipped with a detection device that detects contact between a surface and a wire electrode, when the one wire guide is placed in an arbitrary vertical adjustment position, the wire guide driving device moves the inner of the two axes U and V. two positions u sandwiching a plane perpendicular to the wire guide movement direction including a perpendicular line u_v-o to the workpiece mount movement plane passing through the other wire guide in one axis direction;
_2, u_3 and two positions further outside those two positions u_1
. a contact position x_1 between the detection surface of the vertical gauge and the wire electrode at each point in time;
Find x_2, x_3, x_4, and select u_1 from the previous four positions.
, the distance U_1 between u_2 and the distance U between u_3 and u_4
_3, the distance X_1 between x_1 and x_2 among the four contact positions, the distance X_3 between x_3 and x_4, and the previously measured distance h between the upper and lower ends of the detection surface of the vertical gauge. , by calculating the distance a between the one wire guide and the edge of the detection surface of the vertical gauge near the wire guide, and the distance b between the other wire guide and the edge of the detection surface of the vertical gauge near the wire guide. After determining, the distance of movement of the one wire guide necessary for vertical alignment of the wire electrode, that is, the distance perpendicular to the direction of movement of the wire guide that includes the perpendicular line u_vo to the plane of movement of the workpiece mount that passes through the other wire guide. One position u_ among the respective positions u_1, u_2, u_3, u_4 on the plane
Distance t_i from i or distance t_j from another position U_j that is across the plane containing the perpendicular line u_v-o from one position u_i and separated by a distance U_i = (U_i-t_
i) is calculated using the numerical values a, b, h, the distance U_i, and the distance X_i corresponding to the U_i among the distances between the respective contact positions, and the wire guide driving device is driven based on the calculation result. Then, by vertically extending one of the two axes U and V, and performing substantially the same process as above for the other one of the two axes U and V, the wire electrode 1. A method for vertically pulling out a wire electrode in a wire-cut electric discharge machine, characterized by completing the vertically pulling out the wire electrode. (4) The method for vertically drawing out a wire electrode in a wire electric discharge machine according to claim (3), characterized in that the above method is repeated at least twice. (5) U performed immediately after all vertical alignment work is completed
In each vertical alignment in the axial direction and the V-axis direction, the distance a between the one wire guide used and the detection surface end of the vertical alignment gauge near the wire guide, and the distance a between the other wire guide and the A claim characterized in that the arithmetic mean of two values of the distance b from the edge of the detection surface of a vertical gauge near the wire guide is determined, and the arithmetic mean value is used as calculation data for subsequent machining. A method for vertically extending a wire electrode in a wire-cut electric discharge machine according to item (3) or (4). (6) In the wire-cut electric discharge machine according to claim (3), the one wire guide is moved in an axial direction of the two axes U and V by the wire guide drive device at an arbitrary vertical position. a first step of positioning at a first position u_1 sufficiently distant from a plane perpendicular to the direction of movement of the wire guide including a line u_v−_o passing through the other wire guide and perpendicular to the plane of movement of the workpiece mount; Then, the workpiece drive device moves the workpiece mounting base in a direction parallel to the moving direction of the wire guide among the two axis directions of the a second step of determining a first contact position x_1 with the electrode, and moving the one wire guide in the same direction as above by the wire guide driving device to be closer to the plane than the first position u_1. second position u_
A third step is to move the workpiece mount in the same direction as above by the workpiece drive device, and to position the workpiece mounting base in the same direction as above by the workpiece drive device, and to determine a second contact position between the detection surface of the vertically drawn gauge and the wire electrode by the detection device. a fourth step of determining x_2; and a third position u_3 in which the one wire guide is separated from the plane perpendicular to the wire guide movement direction including the perpendicular line u_v-_o on the opposite side to the second position u_2. a fifth step of moving the workpiece mount in the same direction as above by the workpiece drive device, and positioning the wire electrode by the detection device to a third contact position x_3 between the detection surface of the vertical gauge and the wire electrode; a sixth step of moving the one wire guide in the same direction as above by the wire guide driving device and positioning it at a fourth position u_4 which is farther from the plane than the third position u_3. seventh step, and an eighth step of moving the workpiece mounting base in the same direction as above using the workpiece driving device, and determining a fourth contact position x_4 between the detection surface of the vertical gauge and the wire electrode using the detection device. the distance U_1 between u_1 and u_2 among the four positions, the distance U_3 between u_3 and u_4, and the distance x_1 and x among the four contact positions.
The distance X_1 between _2 and the distance X_3 between x_3 and x_4
and the previously measured distance h between the detection surface ends of the vertical gauges, calculate the distances a and b between each of the upper and lower wire guides and the detection surface ends of the vertical gauges near each wire guide. a first step consisting of a ninth step of calculating; a moving distance of the one wire guide necessary for vertically extending the wire electrode in the same axial direction of the two U and V axes, that is, the distance of the other wire guide; each of said positions u_1, u_ to a plane perpendicular to said wire guide movement direction including a perpendicular line u_v−_o to said workpiece mount movement plane through the wire guide;
2, distance t_ from one position U_i among u_3, u_4
i or another position u that is separated from the position u_i by a distance U_i across the plane containing the perpendicular line u_v−_o
The distance t_j = (U_i - t_i) from _j is determined by the numerical values a and b obtained in the first step, the measured value h measured in advance, and the distance U_i and the distance between each contact position. , a first step of calculating based on the distance X_i corresponding to the distance U_i, and driving the wire guide drive device based on the calculation result to vertically align one of the two axes U and V. a second step, and a third and fourth step in which substantially the same steps as the first and second steps are performed in the other axial direction of the U and V axes. A method for vertically extending a wire electrode in a wire-cut electric discharge machine, characterized by comprising the steps of: (7) The method for vertically drawing out a wire electrode in a wire-cut electric discharge machine according to claim (6), wherein the first to fourth steps are repeated at least twice. (8) After the completion of all vertical loading processes, the one wire guide that was measured, calculated, and used in each of the vertical loading processes in the U-axis direction and V-axis direction that was performed immediately before, and the wire guide that is close to that wire guide. A step is provided for calculating the arithmetic mean of two values, respectively, a distance a to the edge of the detection surface of the vertical gauge and a distance b between the other wire guide and the edge of the detection surface of the vertical gauge near the wire guide. A wire electrode in a wire-cut electric discharge machine according to claim (6) or (7), characterized in that the arithmetic mean value obtained through the process can be used as calculation data for subsequent machining. Vertical method.