JP2004160498A - Die for press working device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die for press working devices which has the rigidity as a die to a wide sheet and with which the best clearance between a die and a punch for working is secured. <P>SOLUTION: In the die for press working devices which is used in the press working device for continuously working a long size sheet into a prescribed shape and consists of an upper die to which a punch 2 is attached and a lower die to which a die 8 is attached and which has guide posts 9 for supporting the upper die so that there is no relative discrepancy in a vertically movable state, and the lower die 7 has three or more guide posts 9a, 9b respectively on both sides of the die in the width direction of the sheet and holes H1, H2 for passing the sheet 10 through on both sides of the die. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a die for a press working device for feeding a long thin plate between an upper die and a lower die and pressing the upper die to process the thin plate into a predetermined shape.
[0002]
[Prior art]
In the press working, there is a punching work as a general method of continuously making a large number of fine holes in a thin plate of a metal, a synthetic resin or the like. The thin plate to be processed is often a long one wound on a roll, and the thin plate is sequentially fed out (in the case of a large-sized thin plate, is sent one by one in a sheet-by-sheet manner). It is supplied between the upper mold and the lower mold. When the upper mold is depressed, the punch attached thereto bites into the thin plate and penetrates into the die opening of the lower die, thereby making a hole in the thin plate.
FIG. 3A is a plan view showing a relationship between a workpiece (thin plate) and a die (lower die) in a conventional press working device. The thin plate 10 sent out from the roll 11 is sent onto the lower die 7, processed, and then wound up on the roll 12. The entire upper mold overlaps the lower mold 7 and is omitted in FIG. 3a.
[0003]
FIG. 3b shows a relationship between a thin plate and a mold of a conventional press working device, and is a cross-sectional view along AA in FIG. 3a. FIG. 3c shows a relationship between a thin plate and a mold of a conventional press working apparatus, and is a cross-sectional view taken along the line BB in FIG. 3a. In each case, the cross section of the guide post is added to facilitate understanding of the relationship between the mold and the guide post.
A punch 2 is attached to the upper base 1 by a punch plate 3, and a stripper 5 guided by a guide pin 4 from the upper base 1 is pushed down by a spring pressure of a spring 6. The guide pin 4 positions the stripper 5 with respect to the upper die base 1 so that the stripper 5 can move up and down. The stripper 5 guides the tip of the punch 2 to move up and down. A die 8 for receiving the tip of the punch 2 is fixed to the lower mold base 7. The upper die base 1 is assembled so as to be vertically movable by guide posts 9 fixed to the four corners of the lower die base 7, so that the punch 2 and the die 8 are accurately guided so that there is no relative displacement. The upper mold base 1 is pressed down by the free shank F so as to be able to move along the pins 4 and processing is performed. Further, a roll-shaped thin plate 10 is supplied between the punch 2 and the die 8 by a feed roll 11 and a take-up roll 12 provided before and after the processing section, and a constant amount of processing and processing are repeated to continuously drill holes in the thin plate 10. Do.
[0004]
[Problems to be solved by the invention]
The width of the mold must be at least larger than the sum of the width of the thin plate 10 to be processed and the diameter of the guide pin 4 × 2. Since the accuracy required for ensuring the processing accuracy is also maintained by the rigidity of the mold itself and the rigidity and dimensional accuracy of the guide post 9, it is generally said that the maximum width of the processing is about 500 mm.
When the sheet width is wider, it is necessary to increase the thickness of the mold to increase the rigidity, especially in order to prevent distortion occurring in the mold section of FIG. With the support of only the guide posts arranged in the mold, the rigidity of the mold is insufficient, and as a result, the required accuracy of the clearance between the punch and the die cannot be secured, and high-quality machining cannot be performed. In particular, when processing high-quality small-diameter holes (approximately φ1 mm) that do not generate burrs on thin plates made of synthetic resin, etc., the clearance between the die and punch must be 5 μm or less. It is becoming difficult to develop a corresponding mold.
[0005]
An object of the present invention is to solve the above-mentioned problems and to provide a die for a press working device which has rigidity as a die even for a wide thin plate and can secure an optimal die and punch clearance for processing. To provide.
[0006]
[Means for Solving the Problems]
In order to achieve the object of the present invention, it is used in a press working apparatus for continuously processing a long thin plate into a predetermined shape, an upper die having a punch attached thereto, a die attached thereto, and the upper die having a relative position. In a mold for a press working device comprising a lower die having a guide post for vertically moving so that there is no deviation, the lower die is provided with the guide posts on both sides of the die in the width direction of the thin plate. It has three or more holes, and has holes on both sides of the die through which the thin plate passes.
A transport roller is attached to the lower die, and the upper tangent plane of at least two transport rollers is preferably parallel to the die surface.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings in which common parts are denoted by the same reference numerals.
Example 1
FIG. 1a is a plan view showing the relationship between a thin plate and a die (lower die) in the press working apparatus according to the present invention. FIG. 1b is a sectional view taken along the line AA in FIG. 1a of a mold for a press working device according to the present invention.
A punch 2 is attached to the upper base 1 by a punch plate 3, and a stripper 5 guided by a guide pin 4 from the upper base 1 is pushed down by a spring pressure of a spring 6. The guide pins 4 position the stripper 5 with respect to the upper die base 1 such that the stripper 5 can move up and down by 10 mm, and the stripper 5 suppresses the vertical movement of the thin plate hitting the tip of the punch 2. The upper base 1 can be moved up and down 40 mm by a guide post 9 fixed to the lower base 7 and a newly added guide post 9a such that the relative displacement between the punch 2 and the die 8 is 2 μm or less. It is assembled in a state.
[0008]
A die 8 for receiving the tip of the punch 2 is fixed to the lower mold base 7. Elongated holes H1 and H2 are formed on both sides of the row of dies 8 so that the thin plate can pass therethrough. The long thin plate is guided from below the lower mold base 7 through the hole H1 onto the die 8 and through the hole H2 again to the rolls 15a and 15d below the lower mold base 7, where a tension of 50 N / m is applied. Have been added.
In this way, the thin plate can be transported through the elongated holes H1 and H2, and the thin plate can be transported without touching the newly added guide post 9a and processed.
The clearance between the die and the punch is 3 μm, the hardness of the punch is HRC64 to 66, the hardness of the die is HRC58 to 60, and the die has a punch and a die having an interval of 12 mm and a diameter of 1 mm with 76 holes, and a guide post interval of 550 mm. The punching speed of the punch was set to 200 mm / sec, and a burr-free hole could be formed on a polyimide sheet having a width of 1000 mm and a thickness of 50 μm with a sag amount of 10 μm or less.
Example 2
FIG. 2A is a plan view showing a relationship between a thin plate and a die (lower die) in the press working apparatus according to the present invention. FIG. 2B is a cross-sectional view along the line AA in FIG. 2A of the press working apparatus according to the present invention. A punch 2 is attached to the upper base 1 by a punch plate 3, and a stripper 5 guided by a guide pin 4 from the upper base 1 is pushed down by a spring pressure of a spring 6. The guide pins 4 position the stripper 5 with respect to the upper die base 1 such that the stripper 5 can move up and down by 10 mm, and the stripper 5 suppresses the vertical movement of the thin plate hitting the tip of the punch 2.
[0009]
A die 8 for receiving the tip of the punch 2 is fixed to the lower mold base 7. The upper die base 1 is assembled in such a manner that the punch 2 and the die 8 can be moved up and down 40 mm by a guide post 9 fixed to the lower die base 7 so that the relative positional deviation is 2 μm or less. Processing is performed in a state of being mounted on the shank F. Further, after the thin plate 10 coming out of the feed roll 11 provided in the preceding stage of the processing section passes under the guide post 9a, the conveying direction is changed upward by the guide roll 15b attached to the hole H1, and the lower die base is changed. The conveyance direction is changed to be parallel (normally horizontal) to the surface of the die 7 by a guide roll 15 c attached to the hole H <b> 1 after passing through the table 7 and supplied between the punch 2 and the die 8. The processed thin plate 10 is changed its conveyance direction downward by guide rolls 15c, passes through the lower mold base 7, changes its conveyance direction horizontally by guide rolls 15d, passes under the guide post 9b, and then is taken up by a take-up roll. It is taken up by 12. With this configuration, the tension between the delivery roll 11 and the take-up roll 12 is set to 80 N / m, and the thin plate 10 can be continuously drilled by repeating the quantitative transfer and processing at a speed of 50 mm / sec.
[0010]
The clearance between the die and the punch is 3 μm, the hardness of the punch is HRC64 to 66, the hardness of the die is HRC58 to 60, and the die has a punch and a die having an interval of 12 mm and a diameter of 1 mm with 76 holes, and a guide post interval of 550 mm. The punching speed of the punch is set to 200 mm / sec, and a burr-free process is performed on a solar cell substrate mainly composed of a polyimide sheet with a double-sided metal film having a width of 1000 mm and a thickness of 50 μm with a sag of 10 μm or less. It was possible to secure a mold life of 1,000,000 times or more.
[0011]
【The invention's effect】
According to the present invention, it is used in a press working apparatus that continuously processes a long thin plate into a predetermined shape, and an upper die to which a punch is mounted, a die is mounted, and the upper die is relatively displaced. In a die for a press working device comprising a lower die having a guide post for supporting it in a vertically movable state so as not to be moved, the lower die has three or more guide posts on one side, and further the thin plate passes therethrough. Holes are provided on both sides of the die, so that in the processing of a wide thin plate, three or more guide posts on one side increase the rigidity of the upper die, and the positional accuracy between the punch and the die can be secured. Further, since the thin plate can be passed through the holes on both sides of the die, the long thin plate can be conveyed while avoiding the guide post, and continuous processing can be performed.
[0012]
Further, with the improvement of the positional accuracy between the punch and the die, wear of the punch and the die is reduced, and the productivity of press working on a long thin plate is improved.
[Brief description of the drawings]
FIG. 1a is a sectional view of a mold for a press working apparatus according to the present invention.
FIG. 1b is a sectional view of a mold for a press working device according to the present invention.
FIG. 2a is a plan view of a press working apparatus according to the present invention.
2b is a sectional view taken along the line AA in FIG. 2a of the press working device according to the present invention.
FIG. 3a is a plan view showing a relationship between a workpiece (thin plate) and a mold in a conventional press working device.
3b is a sectional view taken along the line AA in FIG. 3a, showing a relationship between a thin plate and a mold of the conventional press working device.
FIG. 3c is a sectional view taken along the line BB in FIG. 3a, showing a relationship between a thin plate and a mold of a conventional press working device.
[Explanation of symbols]
Reference Signs List 1 upper die 2 punch 3 punch plate 4 guide pin 5 stripper 6 spring 7 lower die base 8 die 9 guide post 9a newly added guide post 9b newly added guide post 10 thin plate 11 roll 12 roll 15a guide roll 15b Guide roll 15c Guide roll 15d Guide roll F Free shank H1 hole H2 hole

Claims (2)

Used in a press machine that continuously processes long thin plates into a predetermined shape, an upper die with a punch attached, a die attached, and the upper die can be moved up and down so that there is no relative displacement. A press die comprising a lower die having a guide post for supporting in a proper state, the lower die has at least three guide posts on both sides of the die in the width direction of the thin plate, and further includes the thin plate Characterized by having holes on both sides of the die through which the holes pass. The die according to claim 1, wherein a transport roller is attached to the lower die, and an upper tangent plane of at least two transport rollers is parallel to a die surface.

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