JP4091313B2 - Punching device and punching method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punching device and a punching method suitable for punching a predetermined shape from a sheet-like material, and more particularly to a punching device and a punching method suitable for punching a wiring substrate having a predetermined shape from a wiring substrate sheet-like material having a laminated structure. About.
[0002]
[Prior art]
Predetermined electrical wiring is applied on a substrate made of epoxy resin mixed with glass fiber, etc., and a wiring substrate with a predetermined shape, such as a disk, is punched from a wiring substrate sheet-like material coated with insulating resin thereon In this case, the wiring board is punched and formed by a punch provided with a tip of a predetermined shape and a transfer table (die) provided with a through hole at a position facing the tip of the punch.
[0003]
However, with the improvement of the technology of the wiring board, it has become necessary to punch and form a wiring board of a predetermined shape from a wiring board sheet-like material formed by laminating several layers of the wiring board, such as a rotating coil for an electric motor.
[0004]
Therefore, an attempt has been made to punch and form a wiring board using a punch punching apparatus as shown in FIG.
[0005]
In FIG. 6, 1 is a punch having a tip having a predetermined shape such as a circle, 2 is a press plate for pressing and holding the wiring board sheet-like material 3 around it, and 4 is a tip corresponding to the tip shape of the punch. It is a conveyance stand which has the through-hole 5 provided with the shape.
[0006]
With such a punching device, when a wiring board is punched out from a wiring board sheet-like material in which layers of different rigidity and materials are laminated, a lot of fluffy burrs are generated on the cut surface, and the appearance is only deteriorated. In addition, if the wiring board is arranged in the concave portion having a predetermined shape, the wiring board cannot be arranged with high accuracy, or an accident occurs such that the burr is worn during use and generates dust.
[0007]
In order to suppress the occurrence of this burr, as shown in FIG. 7, a cylindrical blade 7 having a cutting edge 6 is attached to the periphery of the punch 1 of the holding plate 2, and the wiring board sheet 3 is pressed and held by the holding plate 2. In doing so, a method has been devised in which a cylindrical blade 7 partially cuts the upper layer portion of the wiring board sheet 3 and then punches out a wiring board of a predetermined shape by the punch 1 and the carrier 4.
[0008]
However, according to this method, the upper layer portion of the sheet-like material is cut relatively cleanly, but the lowermost layer portion is not cut cleanly, and burrs are easily generated, and a sufficiently satisfactory product cannot be obtained. Also, when the punched sheet is warped and deformed due to residual stress, and the transfer of the sheet is stopped to punch the next wiring board from the sheet, the punch cannot be stopped at a predetermined position accurately. There was a problem that the shift was likely to occur.
[0009]
[Problems to be solved by the invention]
An object of the present invention is to provide a punching device and a punching method that are intended to solve such problems and are excellent in cutting performance and capable of improving productivity.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the upper surface is provided with a transport base on which a sheet-like material made of a laminated wiring board sheet is transported, and a predetermined position provided above the transport base and capable of moving up and down A punch having a tip end surface having a shape, a presser plate that presses and holds the sheet-like material together with a transport table around the punch, and a through hole formed at a position facing the punch of the transport table a fixed holding, comprising a cylindrical blade having a cutting edge for a sharp cutting edge tip of the chromatic vital cutting edge destination is set so as to slightly protrude from the conveying table horizontal plane at the tip, the punch And the presser plate descends to press and hold the sheet-like object, and at least a part of the back side of the sheet-like object is a cutting edge portion of the cylindrical blade when the punch comes into contact with the surface of the sheet-like object Can be cut with the punch and cylindrical blade It is mounted is obtained by a punching apparatus according to claim.
[0011]
Thus, by disposing a cylindrical blade provided with a cutting edge portion having an acute edge at the tip on the back surface side of the sheet material, at least a part of the back surface of the sheet material is easily and cleanly cut, Accordingly, since the shearing force extends upward, it is possible to easily form a cut surface where no burr is generated.
[0012]
According to a second aspect of the present invention, there is provided a transport table on which a sheet-like material is transported on an upper surface, a punch provided above the transport table and having a tip surface having a predetermined shape that can move up and down, and the sheet around the punch. A holding plate that holds and presses the object together with the conveying table, and a holding plate that moves up and down , and a cutting blade portion that is fixedly held in a through hole formed at a position facing the punch of the conveying table and has a sharp edge at the tip. A cylindrical blade provided, and the punch and the holding plate descend to press and hold the sheet-like material, and at least when the punch comes into contact with the surface of the sheet-like material, The punch and the cylindrical blade are attached so that a part thereof is cut by the cutting blade portion of the cylindrical blade. The presser plate descends and the When the punch is pressed and held, at least when the front end surface of the punch comes into contact with the surface of the sheet, a part of the back side of the sheet is cut at the cutting edge of the end of the cylindrical blade. After that, the punch is lowered, and before the tip of the punch exceeds the tip edge of the cutting blade portion, the punch is stopped to punch out a predetermined shape from the sheet-like material, By doing so, it is possible to suppress blunting of the sharp blade edge at the tip of the cutting blade portion, endure many times of use, reduce the frequency of replacement of the cylindrical blade, and improve productivity.
[0013]
In the invention of claim 2 , when a wiring board sheet-like material in which a plurality of sheet-like materials are laminated is adopted, a good wiring board in which the generation of burrs on the cut surface is suppressed with high accuracy and high productivity. Can be manufactured.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a punching apparatus and punching method of the present invention will be described below with reference to the drawings.
[0015]
FIG. 2 is a cross-sectional view of a wiring board sheet-like material 30 having a thickness of 30 to 200 μm used in the present invention. 8 is a substrate layer having a thickness of about 60 μm made of epoxy resin containing glass fiber and the like. In the substrate layer, a copper wire having a diameter of 50 to 70 μm, such as a coil formed by a lithography method and a plating method, is laminated with four layers of an adhesive layer 10 having a thickness of about 60 μm, and the top and bottom surfaces are about 20 μm. It is covered with a thick overcoat layer 11.
[0016]
The sheet-like material used in the present invention may be a single-layer material, but is effectively exhibited when it is a laminate of a plurality of layers, particularly 3 or more layers.
[0017]
FIG. 3 shows a disk-like wiring board 12 having a diameter of about 10 mm punched from such a wiring board sheet-like material 3 by the punching apparatus of the present invention. The product to be punched is not limited to the circular plate as in the above example, but may be any shape such as a square plate, an oval plate, or a donut plate.
[0018]
Next, an example punching apparatus according to the present invention will be described.
FIG. 1 shows a punching device in which a part is cut out according to the present invention. Reference numeral 13 denotes a transport table, on which a sheet-like object 3 is intermittently transported by transport means (not shown). A circular through hole 5 penetrating to the bottom is formed at a predetermined position of the transport table 13, and a circular large diameter having a larger diameter is formed in the through hole 5 via a step portion 14 at the bottom. A portion 15 is formed. In this through-hole 5, a circular cutting edge portion 16 having an inner diameter substantially equal to the outer diameter of the tip end face of the punch and having a cutting edge angle of about 60 degrees in cross section toward the outer end at the tip end. A cylindrical blade 17 provided with an annular protrusion 18 is formed at the bottom thereof, and this protrusion 18 abuts against the stepped portion 14 of the through-hole 5 to cut the cylindrical blade. The tip protruding position of the portion 16 is defined. In this case, the tip of the cutting edge of the cutting edge portion 16 is set so as to slightly protrude from the horizontal surface of the transport table 13. The cylindrical blade 17 has a through-hole 19 at the center, and is held and fixed by a holding plate 20 attached to the transport table 13, thereby preventing the cylindrical blade 17 from falling off the through-hole 5. The inner diameter portion of the cylindrical blade 17 has a diameter substantially the same as the outer shape of the tip of the punch at the tip cutting edge portion 16, but the rear side thereof expands in a divergent shape, so that a punched disc-shaped wiring board is formed. It is formed so that it can easily fall down. The shape of the cutting edge portion 16 of the cylindrical blade 17 is the same as the shape of the product to be punched, for example, circular, but the shape of the through hole 5 of the transport base 13 is the same as that of the cylindrical blade 17. The shape can be stored, for example, a cylindrical shape or a rectangular tube shape, and is not affected by the shape of the punched product.
[0019]
In order to remove the cylindrical blade 17 from the through hole 5 in order to polish the tip edge of the cylindrical blade 17 or replace the cylindrical blade 17, the holding plate 20 is removed from the carrier 13 and the cylindrical blade 17 is inserted into the through hole. By removing from 5, it can be performed easily. The cylindrical blade 17 is made of tool steel, high-speed steel, or the like, and is configured so that the tip thereof is not dulled easily even if it is cut into the bottom layer of the wiring board sheet-like object 3 composed of a plurality of layers. ing.
[0020]
Above the carrier 13, an elevating substrate 22 attached by a guide column 21 so as to be movable up and down is attached to a pressing cylinder 24 attached on an upper surface fixing plate 23, and as the pressing cylinder descends and rises, A predetermined amount is attached so as to be movable up and down. In the central part of the lift board, the tip surface for punching the wiring board 12 into a predetermined shape (in this case a disk shape) from the wiring board sheet-like object 3 is the same as the punching shape, for example, circular tool steel, high speed steel, etc. The punch 1 formed in the above is attached in a replaceable manner by inserting the rear end of the punch 1 into the recess 25 of the elevating substrate and attaching the attachment plate 25 to the elevating substrate 22.
[0021]
A holding plate 2 that presses the wiring board sheet-like material 3 and holds it with the transfer table 13 is attached between the elevating substrate 22 and the transfer table 13 so as to be movable up and down by the guide column 21. The part is formed with a through hole 26 that allows the punch 1 to move up and down. On both sides of the punch 1, a lift board 22 and a press plate 2 are connected by a bolt 28 via a sleeve 27, and the press board 2 is stored in a large-diameter portion 29 formed in the lift board 22. The spring 30 is biased downward. As a result, the elevating substrate 22 is lowered by the downward pressing of the pressing cylinder 24, but when the holding plate 2 is pressed against the sheet-like material 3, the further lowering is stopped and only the punch 1 can be lowered. Reference numeral 31 denotes a spring retainer that is screwed into the upper portion of the large-diameter portion 29 and presses the spring 30. The pressing cylinder 24 can be used by appropriately selecting so-called pressing means such as hydraulic pressure, pneumatic pressure, mechanical pressure by an electric motor, and the like.
[0022]
Next, the effect | action is demonstrated about the said structure.
At the time of punching, as shown in FIG. 1, the lifting substrate 22 is raised, and the punch board 1 and the presser plate 2 are separated upward from the conveyance table 13. The sheet-like product 3 is intermittently conveyed by the pitch of the arrangement in the vertical direction of the wiring board 12 portion in the sheet-like material 3 by a conveying means (not shown).
[0023]
When the portion of the wiring board 12 to be punched is positioned on the inside of the cutting edge 16 of the cylindrical blade 17 on the carriage 13, the transfer of the sheet-like portion 3 is stopped. In this state, the pressing cylinder 24 is The wiring board 12 is punched by operating and lowering the elevating board 22.
[0024]
At this time, as shown in FIG. 4, the presser plate 2 and the punch 1 are lowered and the front end surface 32 of the punch and the bottom surface 33 of the press plate press the surface of the sheet-like object 3, When the sheet 3 is pressed and held, the leading edge of the cutting edge 16 of the cylindrical blade 17 bites into the lowermost layer of the sheet 3 and cuts this layer.
[0025]
Further, as shown in FIG. 5, when the tip surface 32 of the punch 1 is lowered, a shearing force acts on the tip blade tip of the cutting blade portion 16 upward, so that the tip surface 32 of the punch 1 acts on the tip blade tip of the cutting blade portion 16. Before reaching, the disc-like wiring board 12 is punched and cut from the sheet-like material 3, falls into the inside of the cylindrical blade 17, and is accumulated outside the cylindrical blade 17.
[0026]
Thereafter, as the punch 1 is raised, the presser plate 2 is also raised, the sheet-like object 3 is moved and stopped to a predetermined position, and the wiring board 12 is sequentially punched from the sheet-like object 3 by repeating the first step. To go.
[0027]
According to the configuration of the above embodiment, the cylindrical blade 17 having a sharp edge at the tip is attached in the through hole of the transport table 13, and the punch 1 and the presser plate 2 are lowered to press and hold the sheet-like material 3 at least. The punch 1 and the cylinder are arranged so that the punch 1 comes into contact with the surface of the sheet-like object 3 and a part of the back side of the sheet-like object 3 is cut by the cutting edge portion 16 at the tip of the cylindrical blade 17. Since the cutting blade 17 is attached, good cutting performance can be obtained, and even if the wiring board sheet-like product 3 is formed by laminating a plurality of layers having different rigidity and materials, the wiring board 12 is reliably beaten without generating burrs. I can pull it out. In this case, the cutting edge of the cutting edge 16 has a cutting edge that is improved as the angle is sharper, but conversely, the cutting edge is liable to be blunted and is preferably 20 degrees or more, while the angle of the cutting edge is large. In this case, the blunting of the cutting edge is less likely to occur, but the cutting property is lowered, so the range of 20 degrees to 80 degrees is preferable, and the range of 30 degrees to 70 degrees is more preferable. Further, the blade edge angle is not limited to one angle, and may be a two-stage angle, for example, up to several millimeters at the blade tip is 30 degrees, and the subsequent angle is 60 degrees wider than the blade tip. Thus, when the angle is two steps, it is possible to easily obtain a cutting edge portion having good cutting performance and blunt resistance.
[0028]
Further, when the punch 1 and the presser plate 2 are lowered to hold the sheet-like material 3 and at least the front end surface 32 of the punch 1 comes into contact with the surface of the sheet-like material 3, the sheet-like material 3. A part of the rear surface side of the cylindrical blade 17 is cut by the cutting edge portion 16 at the tip of the cylindrical blade 17, and then the punch 1 is lowered, and the punch 1 is punched before the tip surface 32 of the punch 1 exceeds the tip of the cylindrical blade 17. Is stopped and the wiring board 12 is punched out from the sheet-like material 3, so that the leading edge 32 of the cutting edge 16 is damaged or blunted by the contact between the leading edge 32 of the punch and the cutting edge at the leading edge of the cutting edge. Can be prevented, can withstand long-term use, and can improve productivity. In this case, the gap D between the lowest descending position of the tip surface 32 of the punch 1 and the cutting edge at the tip of the cutting edge varies depending on the thickness of the sheet-like material, the material, the lowering speed of the punch, etc. When the used wiring board sheet is used, it is 1 to 500 μm, preferably 10 to 200 μm.
[0029]
In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. In the above-described embodiment, the punch 1 and the presser plate 2 and the cylindrical blade 17 are arranged above and below with respect to the conveying table 13, but this arrangement is reversed, that is, the punch 1 and the presser plate 2 are arranged. On the other hand, the cylindrical blade 17 may be disposed on the upper side, or the entire body may be horizontally disposed, and the punch 1 and the presser plate 2 may be disposed on the left or right side, and the cylindrical blade 17 may be disposed on the right or left side. In short, it is sufficient that the punch 1 and the presser plate 2 are movable with respect to the transport table 13 and the cylindrical blade 17 is disposed to face the fixed state. Moreover, in the said Example, although glass fiber containing epoxy resin was used as board | substrate resin of a wiring board, other resin and polyester resin may be sufficient. Further, in the above-described embodiment, the tip surface 32 of the punch 1 does not exceed the tip of the cutting edge portion 16, but may extend beyond the tip of the cutting edge portion 16.
[0030]
【The invention's effect】
According to the punching device of the first aspect of the present invention, the cylindrical blade 17 having a sharp edge at the tip is mounted in the through hole 5 of the transport table 13, and the punch 1 and the presser plate 2 are lowered so that the sheet-like object 3 is attached. The pressing and holding so that at least the punch 1 comes into contact with the surface of the sheet-like material 3 so that a part of the back side of the sheet-like material 3 is cut by the cutting edge portion 16 of the cylindrical blade 17. Since the punch 1 and the cylindrical blade 17 are attached, good cutting performance can be obtained, and even if the wiring board sheet-like material 3 is formed by laminating a plurality of layers having different rigidity and material, the generation of burrs on the wiring board 12 is suppressed. Can be surely punched.
[0031]
According to the punching method of claim 2, the punch 1 and the presser plate 2 are lowered to press and hold the sheet-like object 3, and at least the front end surface 32 of the punch 1 is on the surface of the sheet-like object 3. When abutting, a part of the back side of the sheet-like material 3 is cut by the cutting edge portion 16 at the tip of the cylindrical blade 17, and then the punch 1 is lowered and the tip surface 32 of the punch 1 is cylindrical. Since the descent of the punch is stopped before the tip of the blade 17 is exceeded and the wiring board 12 is punched out from the sheet-like material 3, the cutting blade by the contact between the tip surface 32 of the punch and the blade tip of the cutting blade tip The tip edge of the portion 16 can be prevented from being damaged or dull, and it can withstand long-term use and improve productivity.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration in which a part of a punching device of an embodiment used in the present invention is cut away.
FIG. 2 is a cross-sectional view of a wiring board sheet-like material used in one embodiment of the present invention.
FIG. 3 is a perspective view showing a wiring board sheet-like material used in one embodiment of the present invention and a wiring board punched therefrom.
FIG. 4 is a cross-sectional view showing a state immediately before a sheet-like material is punched by a punching device according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a state immediately after a wiring board is punched from a sheet-like material.
FIG. 6 is a cross-sectional view of a conventional punching device.
FIG. 7 is a cross-sectional view of another conventional punching device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Punch 2 Holding plate 3 Wiring board sheet-like material 5 Through-hole 8 Epoxy resin board layer 9 Copper wire part 10 Adhesive layer 11 Insulating layer 12 Wiring board 13 Carriage 16 Cutting edge part 17 Cylindrical blade 20 Holding board 21 Guide support | pillar 22 Lifting board

Claims (3)

A transport base on which a sheet-like material made of a laminated wiring board sheet is transported on the upper surface, a punch provided above the transport base and having a tip surface with a predetermined shape that can move up and down, and the periphery of the punch around the punch was pressed and held together with the conveying base the sheet, and the pressing plate moves up and down, the conveyed stand fixed and held in said through hole formed in a position opposite to the punch, chromatic vital said a sharp cutting edge at the tip A cylindrical blade provided with a cutting blade portion set so that the tip of the blade edge slightly protrudes from the horizontal surface of the transport table , the punch and the press plate descend to hold the sheet-like material, The punch and the cylindrical blade are attached so that at least a part of the back side of the sheet-like material is cut by the cutting blade portion of the cylindrical blade when the punch comes into contact with the surface of the sheet-like material. A punching device characterized by that. A conveying table on which the sheet-like material is conveyed, a punch provided above the conveying table and having a tip surface having a predetermined shape that can move up and down, and presses the sheet-like material together with the conveying table around the punch. holding, comprising: a pressing plate which moves up and down, the fixed and held on the carrying table in said through hole formed in a position opposite to the punch, and a cylindrical blade having a cutting edge portion having a sharp edge at the tip The punch and the presser plate are lowered to press and hold the sheet-like material, and at least a part of the back side of the sheet-like material is the cylindrical blade when the punch comes into contact with the surface of the sheet-like material. The punch and the cylindrical blade are attached so as to be cut by the cutting blade portion of the punching device, and the punch and the presser plate are moved down by the punching device. Press and hold sheet When at least the front end surface of the punch comes into contact with the surface of the sheet-like object, a part of the back side of the sheet-like object is cut by the cutting edge part at the end of the cylindrical blade, and then the punch is A punching method, wherein the punch is lowered, and the punch is stopped before the tip of the punch exceeds the tip edge of the cutting edge portion, so that a predetermined shape is punched from the sheet. 3. The punching according to claim 2, wherein the sheet-like material is a laminated wiring board sheet-like material, and the tip of the cutting edge of the cutting blade portion is set so as to slightly protrude from the horizontal surface of the transport table. Way .

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