JPH01173108A - Production of working data for piercing device - Google Patents

Abstract

PURPOSE:To improve both the working accuracy and the working efficiency by decreasing the moving frequency in the X direction having a large inertia. CONSTITUTION:The distances of X-direction are obtained against the punching scheduled positions and then arranged in the order of smaller ones. Then the moving variable of an XY table that sets successively said X-direction distances at '0' is obtained as the X-direction moving variable of the XY table. The Y-direction moving variable of the XY table is obtained for each press stroke together with the turn-on/turn-off data on an actuator for each punch based on the working position on each Y-direction line distant from each punch by the extent equal to those arranged X-direction distances respectively. Thus a working is possible in the minimized X-direction moving frequency of the XY table. Then the working accuracy and the working efficiency are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for creating processing data applied to a piercing device.

(Prior Art) It is necessary to form through holes in sheet materials such as green sheets used in multilayer substrates for electronic circuits to connect upper and lower layers.

Therefore, an apparatus for piercing the sheet material has been proposed, for example, in Japanese Patent Application No. 135831/1983.

This device includes a press mechanism in which a plurality of punches are arranged on an upper mold, and a punch selection actuator is provided for each of the punches to select the punch to be operated for punching, and the press mechanism performs the piercing process. It has an XY child table for positioning the sheet material to be applied with respect to the press mechanism.

In this device, the XY child table positioning and punch selection are performed based on NC data provided by CAD or the like.

In other words, N indicates the coordinates of the planned processing position of the sheet material.
The C data is converted into XY child table positioning data and punch on/off data for each press stroke, and table movement and punch selection actuator on/off control are performed based on these data.

[Problem that the invention seeks to solve]

By the way, the above-mentioned XY child table includes an X-direction movable body and an X-direction movable body. Now, on the X-direction movable body,
Considering the XY child table where the direction movable body is arranged, when moving the sheet material in the X direction, only the X direction movable body is moved, but when moving the sheet material in the X direction, , along with the X-direction movable body, the X-direction movable body also
direction. This means that for a table with the above configuration, the inertia is greater when moving in the X direction than when moving in the X direction. Therefore, in order to improve machining accuracy and machining efficiency, it is necessary to It is desirable to reduce the number of movements.

An object of the present invention is to provide a method for creating machining data that allows piercing to be performed in consideration of the above points.

(Means and effects for solving the problems) The present invention has the following features:
The step of setting the processing area in charge of each punch for the sheet material, and the X formed between each of the punches and the planned processing position within the processing area in charge of each of the punches.
A step of determining the respective distances in the X direction and arranging the distances in the X direction in ascending order, and determining the amount of movement of the XY child table to sequentially reduce each of the arranged distances in the X direction to 0 in the X direction of the table for each press stroke. Based on the step determined as the directional movement amount and the processing position on each Y-direction line that is separated from each punch by the arranged X-direction distance, the XY child table X-direction movement amount for each press stroke, and the and obtaining on/off data of the actuator for the punch, thereby obtaining machining data that allows machining to be performed with the number of X-direction movement of the XY child table as small as possible.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a piercing device. This piercing device includes a mechanical section 10 having an XY child table 1 and a press mechanism 12, and a controller 20 that controls the mechanical section 10.

The XY child table 1 has a guide plate 111 fixedly arranged.
, a guide plate 112 guided in the X direction by the guide groove 111a of this guide plate 111, and a workpiece mounting table 1 guided in the X direction by the guide groove 112a of this guide plate 112.
13.

In this XY child table 1, the guide plate 112 and the workpiece mounting table 113 function as an X-direction movable body and an X-direction movable body, respectively.
13 moves on the ■Y plane.

FIG. 6 shows a sheet material 30 such as a green sheet to be pierced. As shown in the figure, this sheet material 30 is fixedly supported around its periphery by a rectangular frame 40.

This sheet material 30 is placed at a predetermined position on the workpiece mounting table 113 by a workpiece supply means such as a handling robot.

Thereafter, the workpiece mounting table 113 is moved in the Y direction, and thereby the unprocessed sheet material 30 is carried into the press mechanism 12. Each time the press mechanism 12 strokes, the table 11 is moved in the X and Y directions by a preset distance programmed in advance, thereby piercing the sheet material 30 at a predetermined position.

Here, the configuration and operation of the press mechanism 12 will be explained. As shown in FIG. 2, in this press mechanism 12, a cylinder block 122 is located above an upper mold 121, and air cylinders 123 for punch selection are arranged in the cylinder block 122 in a matrix. In this embodiment, 8 rows each in the X and Y directions shown in FIG. 1, that is, 64 in total, are arranged.

Punches 124 are arranged in the upper mold 121 at positions facing each of the cylinders 123 .

These punches 124 are supported so as to be able to move up and down, and are normally raised to the position shown in the figure by springs 125.

FIG. 2 shows a state in which the cylinder block 122 is positioned at the top dead center of the press stroke, and in this state the air cylinder 123 is selectively operated. That is, the air cylinder 1 corresponding to the punch 124 that is operated for punching
Air is supplied to 23, thereby extending its piston rod 123a.

The figure shows a state in which air is supplied to the left and right cylinders 123. The rod 123a of the cylinder 123 to which air has been supplied is extended to a position where its tip touches the upper end surface of the punch 124, and at this time a gap l is formed between the tip end surface of the rod 123a and the upper surface of the upper die 121. .

When the unprocessed sheet material 30 is positioned on the guide plate 127 of the lower die 126 by the XY table 11, the cylinder block 122 is moved downward by the pressing blade accompanying the rotation of the cam 128, and at this time, the upper die 121 and Stripper plate 129 is also moved down at the same time.

The upper die 121 stops moving downward when the lower surface of the stripper plate 129 comes into contact with the sheet material 30, and then only the cylinder block 122 moves downward against the spring 130. Then, as shown in FIG. 3, when the cylinder block 122 moves downward to the position where the interval l shown in FIG. As shown in the figure, the pressed punch 124
The sheet material 30 is punched out.

Note that this figure shows a state in which the press mechanism 12 is operated to the bottom dead center.

FIG. 4 illustrates the configuration of the controller 20. C
The NC data given to the controller 20 from the AD etc. is basically a set of data indicating the coordinates of the planned processing position of the sheet material 30, and this NC data is input into the memory in the microcomputer 201 shown in the figure. Ru.

To perform piercing at the scheduled processing position of the sheet material 30, table positioning data for positioning the table 11 for each press cycle and cylinder on/off information for selecting the punch to be operated for each press cycle are required. data is required as processing data.

By the way, in the case of the XY child table 1 having the configuration shown in FIG. 1, the workpiece mounting table 113 can be moved in the Y direction at high speed without much inertia. This is because only the stand 113 needs to be moved.

On the other hand, the movement of the workpiece mounting table 113 in the X direction is
Since the guide plate 112 and the workpiece mounting table 113 move integrally, if the movement is performed at high speed, there is a risk that mechanical vibrations will be generated due to the influence of inertia, resulting in positioning errors.

Therefore, in order to improve machining accuracy and machining efficiency,
It is necessary to create the table positioning data so that the number of times and amount of movement of the XY child table 1 in the X direction is as small as possible.

FIG. 5 shows an embodiment of the present invention for creating machining data based on the above-mentioned NC data in consideration of the above points.

The data creation procedure shown in the figure is executed by the microcomputer 201 or an external processing data creation device.

Now each punch 124 of the press mechanism 12 is 124-1.
．． 124-2. ...124-n, in the process data creation procedure shown in FIG.
The processing area A-1 in charge of 24-t (t-1, 2, . . . n) is determined (step 100).

The hatched areas in Fig. 7 are sheet material 3.
0 is divided into a lattice pattern, the processing area A-1 of the punch 124-i is shown, and this area A-i has the coordinates X
-X section Bi coordinates 1sln 1max Y - Y It is surrounded by the section.

1m1n 1max Processing area A for each of the above punches 124-1 to 124-n
After determining -1 to A-n, the processor 201 allocates processing positions of the sheet material 1 to individual processing areas. That is, since the coordinates of each planned processing position of the sheet material 1 are given in advance as NC data, a process is executed to recognize the coordinates of the planned processing position in each area based on these coordinates (step 101).

Now, if the X coordinates of the planned machining positions existing in the area A-L shown in Fig. 7 are arranged in descending order, then X ≦X
<X <-<Xl, <Xi, a! 1sln
11 12 ...(1) and Y passing through the X coordinate X1j (j-1~m)
When the Y coordinates of the planned machining positions on the line are arranged in descending order, Y ≦ y < y ＜... Ylsln
1j-11j-21j-k<YIj1a!
...It is expressed as (2). In other words, area A
-i has the coordinates of the processing position as shown below.

(X, Y), (X, Y),...tt
tt-t ll 1l-2 (XY12
12-2 1□, tz-t” (X, Y),
...(X, Y), (X, Y),...
ll I■-11m 1m-2 Note that FIG. 8 illustrates each planned processing position in areas A-1 and A-2.

In step 102 shown in FIG. 5, punch 124-i
The coordinates (X, " , "") are Y Xl""1sin-ε...(3) Yl"
"Im□. (4) However, it is initialized as ε>0, and the value l, which will be described later, is initialized to j-1. Furthermore, the position of the punch 124-1 shown in FIG. , has coordinates initialized by the above equations (3) and (4).

In the next step 103, X in each press cycle is
The calculation shown in the following equation (5) for determining the direction table movement amount ΔX and the calculation shown in the following equation (6) for updating the X direction coordinate X1 of the punch 274-i are executed.

x, ” −x + ΔX ... (6) Min(X −X )i shown on the right side of the above equation (5)
j 1 is the X coordinate X (X
, X...X) and punch 274-ilj
ll 12' means to find the minimum distance between X18 and the current X coordinate of im when the minimum distance is changed. Also, Min is l
This means finding the smallest value from 1 to n.

Now, for ease of explanation, suppose that area A-i is only areas A-1 and A-2 illustrated in FIG. 8. In this case, the distance is zero in area A-1 * (X-X) As (XX).

jllll zero *(X-X), (X-X) and *(X-X) exist, and the minimum* value of their distance is (X-X). In addition, 11.1 lines in area A-2 are (X - X '') ij as distance (X - X)
i 21 2*
*, (X-X) and (X-X) exist, and the minimum value of their distance is (X-X'').
Since (X −X )<(X −X ), the initial X-direction movement amount ΔX of the XY table 11
, becomes the book ΔX−(X−X).

l ttt According to equation (6), the current X coordinate of the punch 124-L
The movement amount ΔXl is added to 1*, but this is the punch 27
4- means to virtually shift the current position of i in the X direction by ΔXl.

That is, in the example shown in FIG. 8, this means that the initial positions of the punches 124-1 and 124-2, indicated by the mark Q, are virtually shifted to the positions indicated by the mark ◎ in the figure.

In the next step 104, the following formula (7) is used to calculate the Y-direction table movement amount ΔY for each press stroke.
and the calculation shown in equation (8) below for updating the Y-direction coordinate Y1* of the punch 124-L are executed.

...(7) Y, *l*+ΔY ...(8) Y Min(Y - Y '') shown on the right side of the above formula (7)
ij-k l is the X coordinate X updated by equation (6),
(Ylj
-1'X1j-2'...) and the current Y coordinate Y1* of the punch 124-i. means.

Here, equation (7) will be explained in more detail using FIG.

In the example in the figure, the processing position 0 on the Y line passing through the coordinate X1, each Y coordinate Y11-L, 11-2 1l-3Y
and the distance (Y
-Y ), (Y -Y book) and * tt-t t 11-2
1 (Y - Y) is obtained, and the minimum value of these is determined as * (Y - Y) force 1゛ Y-direction table movement amount ΔY.

On the other hand, equation (7) is expressed as the Y coordinate of the current punch 274-i
Since this means changing the punch 274-i by the amount of movement ΔY4, the punch 274-i is virtually shifted in the X direction by ΔY7 in the ΔXY1 direction according to equations (6) and (8).

To explain this with reference to FIG.
It will be virtually shifted to the position shown in .

In the next step 105, the processing data D − (ΔX
ΔY P) ... (9) it'
i't is set, and the process shown in equation (10) below is executed to increment the processed data number l by 1.

t-tt1...(10)(9
) formula P7 is each punch 124-1 in data number l
．． 124-2. . . . 124-n on/off data, that is, each air cylinder 123-1, 123-2, which is a punch selection actuator shown in FIG. ...123-
This is on/off data of n.

In the example of FIG. 8, punch 1 for area °A-1
24-1 should be pierced at the Δ mark position, but the punch 124-2 for area A-2 should not be pierced at the Δ mark position.

Therefore, in the case of the example shown in the figure, the machining data D1 that is first set after initialization in step 101 is as follows.

(Processing data D1) Eight X: (X-X”) ΔX: (Y-Y”) t tt-t i Pl:124-1 (on).

124-2 (off) In step 106, the X coordinate X1 updated using equation (6)
It is determined based on the following equation (11) whether machining data for all machining positions on the Y line passing through the book have been set.

* However, xlj−x.

If the determination result in step 106 is No, a process is performed to set ΔX to 0 (step 108), and then the procedure returns to step 104.

In other words, in the example of FIG. 8, in step 106, Xl,
It is determined whether or not the machining data has been set for all of the machining position devices Ytt-t'Y and Y on the Y line passing through. In the example shown in FIG. 8, since the determination result in step 106 is NO, the process of setting ΔX (-ΔX2) to 0 is executed in step 107, and then the procedure returns to step 104.
Returned to °.

In FIG. 8, the punches 124-1 and 124-2 currently exist at the virtual positions indicated by Δ marks in the figure, so the calculation result of equation (7) in step 104 is ΔY−(Y− Y) ■Y(Y - Y). Then, for the punch 124-1, the coordinates (X
, Y).

Therefore, in step 105, processing data D2 shown below is set.

(Processing data D2) ΔX: 0 ΔY: (Y-Y) 2 11-2 1l-1P2: 12
4-1 (on).

124-2 (OFF) Similarly, processing data D3 described below is set, and at this point the determination result in step 106 becomes YES.

(Processing data D3) ΔX: 0 ΔY; (Y-Y) 3 11-1 1l-2 P3:124-1 (on).

124-2 (OFF) When the judgment result in step 106 is YES, it is judged in the next step 107 whether or not the creation of processing data for all scheduled processing positions of the sheet material 30 has been completed, and if the judgment result is NO. In this case, the Y coordinate Y1 of the virtual position of the punch
After the process of returning only the book to the initial value according to the following formula (12) is executed (step 109), the procedure is changed to step 103.
will be returned to.

Yl""Ylmin-ε...(12)
In addition, when the process of step 109 is performed, in the example of FIG. 8, the punches 124-1 and 124-2 are returned to the virtual positions indicated by ◎.

In the example of FIG. 8, since only machining data for three machining positions that can be applied to area A-1 are currently obtained, the result of the determination at step 107 is naturally NO.

Therefore, in step 103, the X direction shortness M(X −X ), (X −X ”) marked with Δ in the area A-1
*12 1 1: l 1 and (X −X ”) and 1 at the Δ mark in area A-2
4 L Ne X-direction distance book based on the X coordinate X of the indicated position
Book (X
-X), (X-X) and *(X-X) are determined, and the minimum value (X-X) among them is determined as the X-direction table movement amount ΔX4.

Furthermore, in step 104, the Y-direction table movement amount for the three machining positions on the Y line passing through x21*ΔY-(Y-Y) 2l-12-(Y-Y-ε)-21-12m1
n*ΔY−(Y−Y)−(Y−Y
) and *ΔY−(Y −Y )■(Y −Y
)B 21-3 2 21-3 2
1-2 are obtained, and the processing data shown below is set in step 105 until the determination result in step 106 becomes YES.

(Processing data D4) * ΔX:<X-X> Aggression (X -X -ε+ΔX1) 21 2min ΔY: (Y-Y 4 21-2 2m1n-” P4: 124-1 (off).

124-2 (ON) (Processing data Ds) ΔX: 0 ΔY: (Y-Y) 5 21-2 2l-1P5: 12
4-1 (off).

124-2 (ON) (Processing data D,) ΔX: O ΔY: (Y-Y) 8 21-3 2l-2P6: 12
4-1 (off).

124-2 (ON) When the processing data for all processing positions of the sheet material 30 are created as described above, the determination result in step 107 becomes YES and the creation of the processing data is completed.

FIG. 9 shows the punch 124-1.12 in the example of FIG.
4-2 shows the virtual movement locus, which simply shows the movement pattern of the table 11 based on the table movement amount ΔX ΔY obtained by the above procedure. The figure shows a table movement pattern for efficiently performing piercing with the least amount of table movement in the X direction.

Once the machining data D - (ΔX ΔY P) t t't't is created as described above, actual machining is performed using this data.

That is, the microcomputer 201 shown in FIG.
2-wheel servo amplifier 205 via NC board 202
A two-axis rotation command is given to the cam 128 shown in FIG. 2, which causes the motor 208 to rotate the cam 128 shown in FIG.

Then, every time the press mechanism 12 performs a press operation, ΔX
Command signals NO corresponding to ΔY and Pl are output from the microcomputer 201, among which signals corresponding to ΔX and ΔYl are output from the NC board 202.
are applied to the X-axis servo amplifier 203 and the Y-axis servo amplifier 204 via the motors 206 and 20'l (operated) so that the On the other hand, the command signal corresponding to Pl is
12 through each cylinder 123-1.123-2.・・・
・Driver 213-1, 213- for 123-n
2.213-n respectively.

Pl is all punches 124-1, 124-2 . On/off data for ..., basically cylinder 123-1
, 123-2. For example, if the punch to be turned on (moved downward) is 124-1, a signal based on the data Pl is sent to the driver 213-1 associated with the cylinder 123-1. 1” is added. In this case, the driver 213-1 switches the electromagnetic valve 214-1 to supply air to the cylinder 123-1, which causes the cylinder 123-1 to extend and move the punch 124-1 downward.

In addition, at the time of the first press action, data D −
(ΔX, ΔY, P1), and at the Nth press action, data DN-(ΔxN.

8Y, PN) are used respectively.

Further, the output timing of the processing data in the microcomputer 201 is determined based on the output of an absolute encoder 211 that is linked to the motor 208, that is, the output of the encoder that indicates the cam rotation angle of the press mechanism 12.

In FIG. 4, tachogenerators 215, 216 and 217 are connected to motors 206, 207 and 208, respectively.
The outputs thereof are fed back to servo amplifiers 203, 204 and 205.

Further, pulse encoders 209 and 210 shown in the figure are provided to detect the moving position of the table 11, and their output pulses are fed back to the computer 201 via the NC board 202.

Further, the output of the absolute encoder 211 is input to the computer 201 manually through the rotary cam board 218.

By the way, when punching a sheet material with the punch 124 shown in FIG. 2, the sharpness of the cutting edges of the punch 124 and the die plate 127 has a great influence on the processing quality.

That is, the punch 124 and the die plate 127
As the wear of the cutting edge progresses, the sharpness against the sheet material decreases, resulting in a rack 301 as shown in FIG. 10 at the punched portion of the sheet material 30.

Therefore, the number of strokes of the press mechanism 12 is counted, and when the count value exceeds a certain value, the punch 1
24 and the die plate 127 with new ones, but this method has the following problems.

That is, in the piercing device shown in the above embodiment, the punch 124 to be operated for punching is selected for each press stroke, so the number of press strokes does not necessarily indicate the degree of wear of each punch 124.

In order to solve this problem, it is sufficient to manage the number of punching operations for each individual punch.
) The punch-on-off data P shown in the formula may be used.

That is, since this data Pl is on/off data for each punch 124 for each press stroke as described above, the number of punching operations of each punch 124 can be obtained by aggregating this data Pl.

Therefore, in this embodiment, the microcomputer 201
The number of punching operations of each punch 124 is managed based on the data Pl, and when the number of punching operations reaches a specified number, the punch and the die plate being used at that time are replaced.

〔Effect of the invention〕

If the present invention is applied to a piercing device equipped with an XY table in which a movable body in the Y direction is moved on a movable body in the X direction, piercing can be performed while minimizing the amount of movement of the table in the X direction, This makes it possible to improve machining accuracy and machining efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view conceptually showing an example of a piercing device to which the present invention is applied, FIGS. 2 and 3 are sectional views showing the configuration and operation of the press mechanism, and FIG. Block diagram illustrating the configuration of the controller shown in Figure 5.
The figure is a flowchart illustrating the processing data creation procedure according to the present invention, FIG. 6 is a perspective view showing how sheet materials are attached to support claims, and FIG. 7 is a conceptual diagram showing how to set the processing area in charge. , Fig. 8 is a conceptual diagram showing an example of the arrangement of processing positions within the processing area in charge and the principle of creating processing data according to the present invention, Fig. 9 is a diagram illustrating the movement pattern of the table, and Fig. 10 is a diagram showing an example of the arrangement of processing positions within the processing area in charge. FIG. 3 is a partial view showing a state of punching a sheet material using a die plate. 10... Mechanism section, 11... XY table, 111.
112... Guide plate, 113... Workpiece mounting table, 12... Press mechanism, 1
23...Air cylinder, 124...Punch, 20.
... Controller, 201 ... Microcomputer, 30 ... Sheet material. Figure 2 Figure 3 Figure 4 Figure 6 Figure 7

Claims (1)

[Scope of Claims] A press means in which a plurality of punches are arranged on an upper mold, and a punch selection actuator is provided for each of the punches to select a punch to be operated for punching, and on an X-direction movable body. A movable body in the Y direction is configured to move in the XY direction, and the position of the sheet material to be pierced by the press means is changed for each press stroke.
and a step of setting a processing area in charge of each of the punches on the sheet material, and setting a planned processing position of each of the punches in the processing area in charge of each punch. determining the distances in the X direction, and arranging the moving distances in the X direction in descending order;
a step of determining the amount of movement of the table as the amount of movement of the table in the X direction for each of the press strokes; A method for creating machining data in a piercing device, comprising the steps of determining the amount of movement of an XY table in the Y direction in each press cycle, and the on/off data of the actuator for those punches.