JPH03230823A - Method for adjusting working reference holes - Google Patents

Abstract

PURPOSE:To hold the interval between reference holes to a target value even when positional variation is generated in a workpiece by measuring the interval between the reference hole and the corresponding workpiece and changing the piercing position in a reference hole piercing process based on result measured. CONSTITUTION:In a marking-off process to determine the positional relation between the position of the workpiece and the position of a reference hole 5 to be pierced, the interval between the workpiece (A foil 7, uneven sectional shape, recessed parts) and the reference hole 5 is set to the target value. The reference hole piercing performed in the reference hole piercing process is performed based on this setting. In this way, the reference holes are formed at positions far by prescribed target distances from the workpiece. When the interval is out of the target value beyond an allowable limit, it is detected in an arithmetic process and the piercing positions are changed in a reference hole adjusting process and corrected so that the interval between the workpiece and the reference hole approaches to the target value. In this way, the intervals can be always held in the target values.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hole position adjustment method for adjusting the hole position of a reference hole provided in a long strip-shaped material.

In particular, the present invention relates to a hole position adjustment method when drilling a reference hole in a band material on which metal foil or other workpiece has been previously formed.

[Prior Art] The above-mentioned reference holes are formed in a strip material at predetermined intervals, and when the strip material is subsequently processed,
This hole is used as a reference for the process.

It is desirable that the distance between the reference holes is maintained at a constant value as accurately as possible.

The hole position adjustment method of the reference hole that is commonly used in the past is as follows:
In this method, the strip material is intermittently fed into a mold equipped with a hole punch and a positioning bottle at predetermined intervals, and the hole punch and positioning bottle are operated repeatedly at precise timing in accordance with the movement of the strip material. Ta.

[Problems to be Solved by the Invention] According to the conventional reference hole position adjustment method described above, by accurately adjusting the feeding timing of the strip material and the actuation timing of the punch, it is possible to set the distance between the reference holes with high accuracy. However, such accurate positioning is only possible with respect to the distance between the reference holes and if the strip has been preformed with metal foil or other workpiece before drilling the reference holes. However, it has been extremely difficult to maintain the positional relationship between the metal foil and the reference hole accurately at a constant value using only a constant pitch feed method for forming the reference hole.

The present invention has been made in view of the above-mentioned problems in the conventional reference hole position adjustment method. It is an object of the present invention to provide a method for adjusting the position of a reference hole for machining, which allows accurate positioning of the mutual positional relationship between a workpiece and a reference hole previously formed on a band material.

[Means for Solving the Problem] In order to achieve the above object, the reference hole position adjustment method according to the present invention includes a cueing step for determining the positional relationship between the position of the workpiece and the position of the reference hole to be drilled. , a reference hole punching step of punching a reference hole corresponding to the cue position of the workpiece; a hole position measuring step of measuring n intervals (n is a natural number) between the drilled reference hole and the workpiece; The method includes a calculation step of calculating n measured interval data, and a reference hole position adjustment step of changing the hole drilling position for the workpiece based on the calculation results.

The above-mentioned processed member is a member that has been previously formed on the strip material by some kind of processing before drilling the reference hole. For example, examples include coating materials such as metal foil that are coated on the strip material by pressure welding and rolling, uneven shapes formed on the strip material by so-called coining processing, and recesses formed on the strip material by drawing processing. It will be done.

[Operation] In the above-mentioned indexing step, the distance between the workpiece (Al foil 7, uneven shape 42, recess 44) and the reference hole (5) is set to a target value. The reference hole punching operation performed in the reference hole punching process is performed based on the above settings. As a result, a reference hole is formed at a position spaced apart from the workpiece by a predetermined target distance.

If the distance between the workpiece and the reference hole deviates from the target value by more than an allowable limit when drilling the reference hole continuously, this is detected in the calculation process. In that case, in the reference hole position adjustment process, the position of the reference hole is changed and the distance between the workpiece and the reference hole is corrected so that it approaches the target value.

[Example] FIG. 1 shows an example of an apparatus for implementing the reference hole position adjustment method according to the present invention.

In the figure, a band material 2 is wound around a band material supplying device 1. As shown in FIG. 2, this strip material 2 is made by pressing and rolling a rectangular covering material, such as aluminum (AI) foil 7, on a base material (Fe-Ni base material) 6 made of iron-nickel alloy. This is a so-called clad material formed by sequentially joining at equal intervals. In FIG. 2, two reference holes 5 are provided on the right side of each Al foil 7.
This shows a state in which the strip material supply device 1 is open.
The reference holes 5 are not yet drilled in the band material 2 which is wound around the belt.

Returning to FIG. 1, the strip 2- is intermittently conveyed to the right in the figure by an air feeder 8 serving as a strip conveying means.
They are sequentially sent to a mold 4 (described in detail later). The strip material 2 undergoes drilling of the reference holes 5 by a mold 4, and is then wound up by a winding device 3. As shown in FIG. 2, the wound strip 2 has two reference holes 5 formed on the right side of each Al foil 7. Generally, the AI foil 7 on the strip material 2 is subjected to various processing in subsequent steps, and each of the reference holes 5 described above is used as a reference hole for processing in the subsequent steps.

The mold 4 described above has an upper mold 9 and a lower mold 10, as shown in FIG. These molds are arranged opposite to each other with the strip material 2 conveyed in the direction of arrow A interposed therebetween, the lower mold 10 is fixed, and the upper right mold 9 is pressed by a press (not shown) as shown in the figure. The upper mold 9 is designed to reciprocate in the vertical direction (B-B), and has a main body 11 and a slider 12 broadly. The slider 12 is the main body 1
It is possible to move in the left and right direction CG-C) in the figure with respect to 1,
Normally, the left end 12a is pressed against the lower right end surface 11a of the main body 11 by the spring force of the spring 13.

Press members 14 and 15 are attached to the bottom surface of the main body 11 and the bottom surface of the slider 12, respectively, with an appropriate gap S between them. The main body side press member 14 has a spring 1
6, it is urged downward, that is, in the direction toward the lower mold 10. On the other hand, although not shown, the slider side press member 15 is similarly urged downward by a spring force.

The upper mold body 11 is provided with a punch 18 for making holes. Further, the slider 12 is provided with a positioning bin 19. As shown in FIG. 5, the hole punch 18 is
Two positioning bins 19 are provided in the width direction of the strip material 2, and at least two positioning bins 19 are provided in the width direction of the strip material. Of course, as shown in the figure, four may be provided in two directions: the belt material conveyance direction and the belt material radial direction. An escape hole 21 is provided in the lower mold 10 at a position facing the punch 18 and the positioning pin 19.

When the strip material 2 is fed to a predetermined position between the upper mold 9 and the lower mold 10 and once stopped, the upper mold 9 is lowered by a press (not shown) and pressed against the lower mold 10. At this time, the punch 18 is used to punch the reference hole 5 (
(See Figure 2). The positioning pin 19 fits into the reference hole 5 already made by the punch 18, and the hole in the reference hole positions the strip material 2 at the time. This operation is repeated at a predetermined timing as the strip material 2 is intermittently conveyed in the A direction by the air feeder 8 (Fig. 1), so that the strip material 2 has a plurality of reference holes. 5 are opened in a row at approximately regular intervals.

As already mentioned, the band material 2 is a clad material having a rectangular Al foil 7 (see FIG. 2). In this case, although these AI foils 7 are formed at substantially constant intervals, when this is viewed very strictly, there are variations among the respective Al foils. Therefore,
Even if the distance between the reference holes 5 is positioned accurately, the positional relationship between the Al foil 7 and the reference hole 5 may not always be constant with respect to the Al foil 7. do not have. If there is variation in the positional relationship between the A1 foil 7 and the reference hole 5, there is a risk that various processing operations performed on the AI foil 7 in subsequent steps will be hindered. Therefore, in order to eliminate such variations in the positional relationship between the AI foil 7 and the reference hole 5, Honjitsuo employs a configuration as described below.

First, in FIG. 1, a first television camera 22 is disposed on the left side of the mold 4, that is, on the upstream side with respect to the belt material conveyance direction A. This camera captures an image of the strip material 2 being fed into the mold 4 and outputs the image signal to the control device 23. The control device 23 that received the video signal
The image of the strip material based on the video signal is captured by the first television camera 2.
The image is displayed on a monitor 24 placed upstream of the camera 2. At this time, two cue lines 25 as shown in FIG. 3 are always displayed at fixed positions on the monitor 24 together with the image of the strip material. The intervals between these cue lines 25 are set to correspond to appropriate values depending on the required positional accuracy of the reference holes 5. In the embodiment, the interval is set to correspond to a length of 20 Pm.

Regarding the mold 4, as shown in FIG. 4, a cutter 17 is provided on the left side of the punch 18 for making the hole in the upper mold 9. As shown in FIG. 5, this cutter 17 extends in the width direction of the strip material 2 (in a direction perpendicular to the conveyance direction of the strip material), and has a length longer than the width direction of the strip material 2. are doing. In FIG. 4, a knockout 20 is provided inside the lower mold 10 at a position facing the cutter 17 and is biased upward by a spring 26.

A space 27 is formed above the cutter 17, and a flat cam 28 is disposed within the space 27. As shown in FIG. 5, this flat cam 28 is driven by an air cylinder 29 to reciprocate in the direction of arrow DD (direction perpendicular to the direction of conveyance of the strip material). This reciprocating movement causes the flat cam 28 to reach a position where it extends above the cutter 17 (projection position: chain line E),
The position to evacuate from there (evacuation position: solid line and broken line F)
It is designed to take two positions.

When the flat cam 28 is in the extended position (dashed line E) in FIG. 5, the upward movement of the cutter 17 in FIG. When the upper mold 9 is pressed against the lower mold 10, the strip material 2 is cut by the cutter 17. On the other hand, flat cam 2
When the cutter 8 is in the retracted position (solid line and broken line F) in FIG.
The strip material 2 is not cut. When drilling the reference hole 5 under normal conditions, the flat plate cam 28 is placed in the retracted position (solid line and broken line F) in FIG. 5, so that the cutter 17 can freely move upward. It has become.

12- The operation of the air cylinder 29 for moving the flat cam 28 in the DD direction is controlled by the control device 23.

As already explained in FIG. 4, the slider 12 can move in the C--C direction and is biased leftward by the spring 13. In this example,
Furthermore, two fixed cams 30 and 31 are arranged parallel to each other at an appropriate interval on the bottom surface of the slider 12. One moving cam 32 is provided corresponding to the left fixed cam 30, and another moving cam 33 is provided corresponding to the right fixed cam 31. These moving cams 32 and 33 are driven by air cylinders 34 and 35 (see FIG. 5) fixed to the upper mold body 11, respectively, so as to reciprocate in a direction perpendicular to the direction of conveyance of the strip material. It has become.

In the state shown in FIG. 5, both air cylinders 34 and 35 are turned off, and the slider 12 is in an upstream position that touches the bottom right end surface 11a of the upper mold body 11.

When the left air cylinder 34 is turned on from this state, the left moving cam 32 protrudes in a direction perpendicular to the belt material conveyance direction (upward in the figure) and hits the left fixed cam 30. As a result, the slider 12 moves to the right in the figure. direction (downstream direction with respect to the belt material conveyance direction) by an appropriate distance, for example, 5 μm.

Further, when the left air cylinder 34 is turned off and the right air cylinder 35 is turned on, the right moving cam 33 extends and hits the right fixed cam 31, and as a result, the slider 12 is further moved downstream by an appropriate distance, for example, 5 μm, a total of 10 μm. move in the direction. That is, the slider 12 has an upstream position corresponding to the bottom right end surface 11a of the upper die main body 11, a central position 5 μm downstream from that, and a further 5 μm from there.
It is possible to take three downstream positions. As the slider 12 moves between these three positions, the positioning bin 19 attached to the slider also moves between three positions, upstream, central, and downstream, which are separated by 5 μm from each other. .

In the initial state when drilling is performed, the positioning bin 19 is placed in the center position in advance.

Both air cylinders 34 and 35 are connected to the control device 23, and are turned on and off by commands from the control device.

In FIG. 1, a second television camera 3 is installed downstream of the mold 4 (on the right side of the figure) and upstream of the air feeder 8 (on the left side of the figure).
6 are arranged. This camera takes an image of the strip material 2 that has been drilled in the reference hole 5 and sends the image signal to the control device 23. The control device 23 that has received the strip video signal from the second television camera 36 determines the distance between the tip of each A1 foil 7 and the center of the reference hole 5 in FIG. 2 based on the video signal. L1 is calculated, and based on the calculation result, both air cylinders 34 and 35 in FIG.
The position of the positioning bin 19 is adjusted by controlling on/off. This positioning control of the positioning bin 19 is performed by shifting the strip material 2 upstream or downstream in the conveying direction when punching the reference hole 5 with the punch 18. Line 15- is used to adjust the position.

Hereinafter, a specific example of the control executed by the control device 23 will be described, and a flow of work for drilling the reference hole 5 will be described.

In FIG. 1, the strip material 2 discharged from the strip material supply device 1 is placed in the mold 4.
The film is wound up by the winding device 3 via the winding device 3.

In this state, the air feeder 8 can automatically convey the strip 2 intermittently.

However, when the strip material 2 is initially unwound from the strip material supply device 1, the strip material 2 has not yet reached the air feeder 8. It is necessary to feed it into the mold 4 by the following steps.

Furthermore, when drilling the first reference hole 5, it is necessary to accurately position the distance between the hole and the A1 foil 7.

In this embodiment, an operator manually feeds the strip 2 into the mold 4. At this time, the operator performs the feeding work while checking the monitor 24. When the tip of the strip 6-2 reaches the mold 4, the monitor 24 shows that the hole in the mold 4 is at a distance 111L2 from the first television camera 22, measured from the center of the punch 18. Some A1
The foil 7a is projected. The operator positions the strip material 2 so that the tip of the Al foil 7a falls between the two cueing lines 25 displayed on the monitor 24.

When the position setting of the strip material 2 is completed, the operator presses the operation button (not shown, not shown) placed on the press machine operation section 37.
is pressed. As a result, the upper die 9 in FIG. 4 is pushed down only once, and the first reference hole 5a is opened at the target position.

Next, the operator visually advances the strip 2 by one section between the two adjacent A1 foils 7, and in this state presses the activation button of the press operating section 37. As a result, the upper mold 9 descends again to open the second reference hole 5b. In this case, the strip material 2 already has the first reference hole 5.
The reference hole 5b is accurately positioned with respect to the A1 foil 7 because the holes a are opened and these holes fit into the positioning pins 19 of the upper mold 9.

The above operations by the operator are repeated until the leading end of the strip material 2 reaches the air feeder 8. After the strip material 2 comes to be supported by the air feeder 8, the strip material 2 is continuously and intermittently conveyed by the air feeder 8, and under the control of the control device 23, the strip material 2 is fed to the standard by the mold 4. Drilling of holes is done automatically.

As mentioned above, in FIG. 1, the second television camera 36 placed upstream of the air feeder 8 controls the image of the strip 2 with the reference holes 5 drilled. Based on the video signal, the control device 23 adjusts the reference hole 5 and the Al foil 7.
Calculate the interval L1 between the two. This calculation is executed for each of the n reference holes. Here, n is a natural number, and is set to an appropriate value depending on the quality of the band material 2 to which it is applied.

The data table in the control device 23 stores the following five types of reference values regarding the distance between the reference hole and the A1 foil.

(1) Target value which is the target interval value (2) First limit value on the plus side: +a (3) Second limit value on the plus side: +b (4) First limit value on the minus side knee a (5) Minus side Second limit value knee b The first limit value +a on the plus side and the first limit value -a on the minus side have the same absolute value and opposite signs.

Also, the second limit value on the positive side +b and the second limit value on the negative side -
Similarly, b has the same absolute value and opposite sign. The relationship between a and b is a (b).

The control device 23 individually compares the n reference hole interval values L1 calculated as described above with the above target value to calculate the deviation from the target value.

Then, the average of the obtained n deviation values is calculated.

The calculated average deviation value is each of the above limit values +a.

It is compared with +b, -a, and -su, respectively. As a result of the comparison, the control device 23 controls the positioning bin adjusting air cylinders 34, 35 and the cutter 17 shown in FIG. 5 as follows.

(1) The first case where the average deviation value Va is both positive and negative
If it is between the limit values +a and -a (a < V
a<+a): In this case, the air cylinders 34 and 35 are maintained in their previous state.

(2) When the average deviation value Va exceeds both first limit values +a and -a but is smaller than both second limit values +b and -b (b<Va<-a or +a<Va<+b). In this case, it is determined that the position of the drilled reference hole 5 deviates from the corresponding AI foil 7 by more than the allowable value, and the position of the positioning bin 19 shown in FIG. 5 is changed. That is, when the average deviation value Va exceeds +a (first limit), it is determined that the distance between the foil and the hole has become wider,
The left air cylinder 34 in FIG. 5 is turned off and the right air cylinder 35 is turned on to move the positioning bin 19 to the downstream position (right position in the figure). This will cause the next 2
0- The Al foil to be punched is drawn close to the punch 18.

On the other hand, when the average deviation value Va becomes -a (first limit) or less, it is determined that the distance between the foil and the hole has become smaller, and both air cylinders 34 and 35 are turned off and the positioning bin is 19 to the upstream position (the position shown).

By moving the positioning bin 19 as described above, the distance between the foil and the hole can be returned to the target value again.

(3) The second case where the average deviation value Va is both positive and negative
When the limit values +b and -b are exceeded (Va (-b or +b<Va), the position of the reference hole 5 is normally corrected to the target position by the control in (2) above. In abnormal situations, such as when the position of the Al foil 7 on the strip material 2 has a very large variation, even with the control described in (2) above, the reference hole position cannot be corrected, and as a result, the average deviation value Va may exceed the second limit value +b or -b. In this case, the control device 23 leaves the adjustment air cylinders 34 and 35 as they are, turns on the cutter air cylinder 29, and operates the flat plate cam. 28 cutter 1
7 to the upper position (extended position). This prevents the strip material 2 from being sent to the next process because the strip material 2 is cut and the reference hole 5 is in an abnormal position.

As described above, according to this embodiment, the positioning inside the mold 4, especially the upper mold 9, is performed based on the distance between the reference hole 5 and the A1 foil 7 detected by the second television camera 36 in FIG. The position of the bin 19 is controlled by a control device 23. As a result, even if the position of the AI foil 7 on the strip material 2 varies, the distance between the A1 foil 7 and the reference hole 5 can be maintained at a constant value.

Note that the control device 23 measures n reference hole positions, takes the average, and then calculates the average value above each limit value a, -a, +b.
and -b. Even if the individual reference hole positions exceed each limit value, if the average value does not exceed each limit value, the above-mentioned bin position adjustment air cylinder 34°35 and cutter air cylinder 29 No operation control is performed.

Although the present invention has been described above using one example, the present invention is not limited to that example.

For example, in the above example, the average of n measured values was taken and control was performed using that average value, but the value used for control is not limited to the average value, but any other calculated value may be used. I can do it.

The gist of the present invention is to change the position at which the reference hole 5 is formed based on the n measured values, and other methods such as the above-mentioned cutting process of the strip material 2 by the cutter 17 are performed. The accompanying processing may or may not be performed.

In the above embodiment, a method of changing the position of the positioning pin 19 of the upper mold 9 was adopted as a method for changing the position of the reference hole 5, but apart from this, a method shown in FIG. It can also be adopted. This method consists of fixing the entire mold 4 consisting of an upper mold 9 and a lower mold 10 on a slider 38, and moving the slider 38 on a fixed base 39 in parallel with the strip material 2. It is capable of reciprocating movement in the direction of H-H. When changing the position of the reference hole 5, the entire mold 4 is moved relative to the strip 2.

Another method for changing the position of the reference hole 5 is to fix both the positioning bin and the mold and move the strip material for position adjustment. You can also do that.

Figures 7a to 7d show an example of an apparatus for carrying out such a method.

In this device, both the upper die 9 and the lower die 10 are fixed in position, and the strip material 2 is conveyed between them. The method in which the strip material 2 is intermittently conveyed by the air feeder 8 (see Fig. 1) is the same as the method described above, but in this device, in addition to the air feeder 8, there is also a The strip 2 can be moved 24- for position adjustment by means of conveying means, for example a servo motor (not shown).

When making a reference hole in the strip material 2 using the punch 18 attached to the upper mold 9, first lower the upper mold 9,
Its descent is stopped when the guide bin 19 attached to it enters halfway into the already drilled reference hole 5 (FIG. 7b).

If the position of the reference hole 5 deviates by more than the allowable value,
In the state shown in the figure, the above-mentioned servo motor is operated to move the strip material 2 in the direction to correct the misalignment. In Figure 7c,
A state in which the strip material 2 has moved to the right is shown. In this case, since the guide bin 19 is placed in the reference hole 5, the range in which the strip material 2 moves is within the range of the gap between the reference hole 5 and the guide bin 19. As described above, the position of the strip material 2 is corrected, and then the upper die 9, which had been stopped for a while, is lowered again, and a reference hole is punched at an accurate position by the punch 18.

FIG. 8 shows a modification of the strip material 2. In the above-mentioned embodiment, as shown in FIG.
I thought about metal foil such as. On the other hand, in FIG. 8, two bottles 4 are formed by coining the base material 6.
A concavo-convex shape 42 having numbers 0 and 41 is formed, and this is used as a processed member. Regarding the band material 52 according to this modification, in the next step, for example, as shown in FIG.
Work such as fitting is performed.

FIG. 10 shows yet another modification of the strip material 2.

This band material 62 has a concave portion 44 formed by drawing process.
It has as a processing member. Regarding this strip material 62, in the next process, for example, a product 4 as shown in FIG.
5 is inserted into the recess 44 using the reference hole 5 as a reference.

[Effects of the Invention] According to the present invention, it is possible to measure n intervals between the reference hole (5) drilled in the reference hole punching process and the corresponding workpiece (AI foil 7, uneven shape 42, recess 44, etc.). However, based on the measurement results, the positions of the holes in the reference hole punching process are changed. Therefore, the strip material (
2) Even if there are variations in position in the previously formed workpiece, the distance between the workpiece and the corresponding reference hole can always be maintained at the target value.

[Brief explanation of drawings]

FIG. 1 is a side view showing the entire apparatus for carrying out the hole position adjustment method according to the present invention, FIG. 2 is a plan view showing an example of a band material to which the present invention is applied, and FIG. 3 is the same as that shown in FIG. FIG. 4 is a side sectional view showing an example of a mold used in the reference hole punching process in the device shown in FIG. 1, and FIG. ■- in the diagram
■Bottom view when looking at the upper mold from the bottom according to the line, No. 6
The figure is a schematic side view showing an example of a means for implementing the reference hole position adjustment process, and FIGS. 7a to 7d are schematic side views showing another example of the means for implementing the reference hole position adjustment process, Fig. 8 is a plan view showing a modified example of the band material, Fig. 9 is a side view of the band material, Fig. 10 is a plan view showing another modification example of the band material, and Fig. 11 is a side view of the band material. It is a side sectional view of a strip material. 7-... Al (aluminum) foil, 42... uneven shape, 44... recess, 5... reference hole, 22... first television camera, 24... monitor, 4... gold Mold, 9... Upper die, 10... Lower die, 18... Hole punch, 36-@2 TV camera, 23... I
II control device, 34.35... Air cylinder for position adjustment, 30.31... Fixed cam, 32.33... Moving cam, 19... Positioning bin, 38... Slider

Claims (2)

[Claims] (1) In a method for adjusting the position of a reference hole for processing, which is used when pressing a strip having a pre-processed workpiece using a progressive die, the position of the workpiece and the position of the reference hole to be drilled are as follows: a reference hole punching step of punching out a reference hole corresponding to the cue position of the workpiece, and a distance of n (n is n) between the drilled reference hole and the workpiece. natural number); a calculation step of calculating n measured data; and a reference hole position adjustment step of changing the drilling position with respect to the workpiece based on the calculation result. How to adjust the reference hole position for machining. (2) In a method for adjusting the position of a working reference hole used when pressing a cladding material formed by joining a covering material onto a strip using a progressive mold, the position and opening of the covering material are adjusted. a cueing step for determining the positional relationship with the position of the reference hole to be formed; a reference hole punching step for punching out the reference hole at the cueing position of the covering material; and a spacing between the drilled reference hole and the covering material. A hole position measurement step for measuring n holes (n is a natural number), a calculation step for calculating the n measured interval data, and a reference hole position adjustment step for changing the drilling position for the covering material based on the calculation results. A method for adjusting the position of a reference hole for machining, comprising: