JP4071396B2 - Punch device support member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention particularly relates to a support member for a punching apparatus used for punching a ceramic green sheet (hereinafter simply referred to as a green sheet) for forming a ceramic substrate.
[0002]
[Prior art]
FIG. 2 is a cross-sectional view of the main part of the punching apparatus proposed by the applicant of this application in Japanese Patent Application No. 10-15720. In the figure, A is a support member, which is composed of a base portion 1 and a surface layer 10. The base portion 1 is made of, for example, polypropylene, and is a sheet obtained by integrally injection-molding or extruding the upper plate portion 1a, the beam portion 1b, and the lower plate portion 1c. In the illustrated case, the upper plate portion 1a, the beam portion 1b, and the lower plate portion 1c each have a thickness of 0.5 mm, and the pitch of the beam portions 1b is 5 mm. The surface layer 10 is made of, for example, an epoxy resin, and is coated on the surface of the upper plate portion 1 a with a thickness of 0.1 to 0.3 mm so as to be integrated with the base body portion 1. A punch 2 is slidable in a vertical direction in a hole 4 provided in the punch holder 3. 5 is a green sheet. Reference numeral 11 denotes a table that supports the support member A.
[0003]
Next, a conventional drilling procedure will be described. First, in a state where the green sheet 5 is not placed, the punch 2 is lowered by a driving device (not shown) until the tip of the punch 2 penetrates the upper plate portion 1a, and the surface layer 10 and the upper plate portion 1a have the same diameter as the punch 2. The hole 6 is formed. Thereafter, the green sheet 5 is positioned at a predetermined position, and the punch 2 is lowered by a driving device (not shown) until the tip penetrates the hole 6 to make a hole in the green sheet 5. The punch of the green sheet 5 falls into a space 1d formed by the upper plate portion 1a, the beam portion 1b, and the lower plate portion 1c, and is discharged to the outside by a suction device (not shown).
[0004]
Since the epoxy resin has higher bending rigidity and hardness than polypropylene, the mouth is hardly deformed, and the life as a die can be more than twice as long as that of a support member made of only polypropylene. And, since only one layer of the surface that becomes a so-called cutting edge is made of a material having high bending rigidity and hardness, for example, it is easier to manufacture than an epoxy resin that is difficult to mold and can be formed at a low cost. .
[0005]
[Problems to be solved by the invention]
By the way, when the material of the base portion 1 is extruded as polypropylene, as shown in FIG. 3, on the outer surface side of the connection portion between the upper plate portion 1a and the beam portion 1b and the connection portion between the lower plate portion 1c and the beam portion 1b. The recess 12u and the recess 12b may occur. And when the dimension of the base | substrate part 1 is what is shown in FIG. 2, the height of the recessed part 12u and the recessed part 12b is about 0.15 mm, respectively. The recess 12u is filled by coating the surface layer 10, but conventionally, the recess 12b has not been treated and has been left as it is.
[0006]
FIG. 4 is a diagram schematically showing the deformation of the support member A during drilling. When a punching load P by the punch 2 is applied to the support member A in the presence of the recess 12b, the lower plate portion 1c side is deformed downward by δ1, as shown by a dotted line in FIG. The 10 side is also deformed downward by δ2. As a result, the green sheet 5 was processed with the lower side extended more than the upper side, and when the green sheet 5 was flattened, the diameters of the formed holes were not uniform. Further, the life of the support member A was shortened by repeating the deformation of δ1 or δ2. Further, when the support member A is fixed to the table 11 by vacuum suction, since air enters from the recess 12b, the force for fixing the support member A to the table 11 is weakened.
[0007]
An object of the present invention is to provide a support member for a punch apparatus that solves the above-described problems, is excellent in the quality of processed holes, and can extend the life as a die.
[0008]
[Means for Solving the Problems]
The above-described problem is that the punch and the support member are positioned in a horizontal direction at a predetermined interval, and the support member of the punching device that forms a hole in the work by using the support member that has been punched by the punch as a die, the support is provided. The upper plate part and the lower plate part are connected by a beam part so that a space is provided inside, and a plurality of layers made of different materials are stacked in the thickness direction on the upper plate part and the lower plate part, respectively. And the outer surface side of each outermost layer of the upper plate portion and the lower plate portion is formed flat, and the upper plate portion and the lower plate portion can be used as dies, respectively .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view of a principal part of a punching apparatus showing an embodiment of the present invention. The same parts as those in FIGS. In the figure, B is a support member, which is composed of a base portion 1, a front surface layer 10, and a back surface layer 20. The base portion 1 is made of polypropylene, for example, and is a sheet obtained by integrally extruding the upper plate portion 1a, the beam portion 1b, and the lower plate portion 1c. The material of the front surface layer 10 and the back surface layer 20 is an epoxy resin, and is coated on the surfaces of the upper plate portion 1 a and the lower plate portion 1 c to a thickness of 0.1 to 0.3 mm, and is integrated with the base portion 1. Since the processing procedure is the same as the conventional one, the description is omitted.
[0010]
Next, differences between the present embodiment and the prior art will be described.
Even if the same recess 12u and recess 12b as in the prior art are formed in the base portion 1, the recess 12u and recess 12b are substantially eliminated by forming the surface layer 10 and the back layer 20, and the surface of the support member B and The back side becomes flat. As a result, at the time of drilling, the front surface layer 10 and the back surface layer 20 hardly bend. Therefore, the green sheet 5 is not deformed during drilling, and the diameter of the formed hole is uniform. Furthermore, since the surface is flat, it can be securely fixed to the table 11 even when it is fixed by vacuum suction. Moreover, running costs can be further reduced if the top and bottom are switched.
[0011]
In the above description, the epoxy resin is coated on the surface of polypropylene. However, other means such as bonding an epoxy resin sheet by adhesion, welding, pressure bonding, and screwing may be used. Further, instead of the epoxy resin, a metal such as titanium, copper, and stainless steel may be laminated by adhesion, plating, spraying, or the like. In this case, a thickness of 0.05 mm is sufficient. Further, the number of layers to be stacked is not limited to two, and several types of layers may be stacked.
[0012]
【The invention's effect】
As described above, according to the present invention, the punch and the support member are positioned in the horizontal direction at a predetermined interval, and the punching device is used to make a hole in the workpiece by using the support member that is drilled by the punch as a die. The support member has a structure in which the upper plate portion and the lower plate portion are connected by a beam portion to provide a space therein, and the upper plate portion and the lower plate portion are made of a plurality of layers made of different materials. Is formed by overlapping in the thickness direction, the quality of the processed hole is excellent, and the life as a die can be extended.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a punch device showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of a conventional punch device.
FIG. 3 is a cross-sectional view of a main part of a conventional punch device.
FIG. 4 is a diagram schematically showing deformation of a support member A during conventional drilling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base part 1a Upper board part 1b Beam part 1c Lower board part 2 Punch 2
5 Green sheet 6 Hole 10 Surface layer 20 Back layer B Support member

Claims (1)

In the support member of the punching device which positions the punch and the support member in a horizontal direction at a predetermined interval, and makes a hole in the work using the support member drilled by the punch as a die,
The support member has a structure in which an upper plate portion and a lower plate portion are connected by a beam portion to provide a space inside, and a plurality of layers of different materials are provided in the thickness direction in the upper plate portion and the lower plate portion, respectively. And the outer surface side of the outermost layer of each of the upper plate portion and the lower plate portion is formed flat so that the upper plate portion and the lower plate portion can be used as dies, respectively. Support member for punch device.

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