JPH0732055A - Manufacture of article made of sheet-like blank and device therefor - Google Patents

Abstract

PURPOSE:To easily bend a wire net in zigzag state at the cross section without changing the mesh of net, or form a bulging part in the hollow part of a metal sheet-made product. CONSTITUTION:A elastic body 13 of urethane rubber, etc., is arranged at the either side of a lower die 7 and an upper die 10 in a pressing device, and a sheet-like blank of the weir netting, etc., is bend-deformed through this elastic body 13. the sheet-like blank 4 is plastic-deformed by pressing to the die 7, 10 positioned at the reverse side because the elastic body 13 is freely deformed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a manufacturing method for manufacturing articles having various cross-sectional shapes from a plastically deformable sheet material such as a wire mesh or a thin steel plate.

[0002]

2. Description of the Related Art When a thin steel plate is plastically processed to produce a tubular article, a female mold and a male mold made of steel are attached to a press machine, and a material such as a thin steel plate is formed by a pair of male and female molds. It is well known that by pinching, plastic working is performed in a cross-sectional shape that follows the shape of the mating surfaces of both molds.
The manufacturing method using this press machine has an advantage that productivity can be improved because the same shape can be efficiently mass-produced.

[0003]

By the way, in the case of manufacturing a filter with a wire mesh, there is a constraint that the mesh should not change during processing, while a conventional press device equipped with a die made of steel or the like is used for the wire mesh. If the wire mesh is only applied to bending, the wire mesh will be stretched during processing, and the mesh of the wire mesh will change in a non-uniform manner, making it impossible to function as a filter.

For this reason, conventionally, the filter has not been bent by a press machine, but a bag-shaped filter is formed by welding a raw material wire mesh, and a ring-shaped mouthpiece is formed at the mouth of the filter. However, this method has a problem that the filtration efficiency is low because the productivity is extremely low and the filtration area of the filter cannot be increased.

In the case where a ring-shaped metal plate is formed in a hollow shape such as a U-shaped cross section by a pressing device, and the groove intervals of the hollow portions are the same, first, the metal plate is formed into a pair of male and female. The mold can be first bent into an L-shaped cross section, and then the pair of other molds can press the side plates of the L-shaped blank to form the U-shaped cross section. When forming a bulging part in the hollow part, as in the case of forming the groove interval of the hollow part so as to widen toward the inner part, it is possible to bend by simply sandwiching with two molds. However, there was a problem that the processing was very difficult.

Further, it has been difficult in the past to bend a single metal plate into a flask shape using a press machine.
INDUSTRIAL APPLICABILITY The present invention makes it extremely easy to bend a wire mesh into an appropriate cross-sectional shape without changing the size of the mesh, or to form a bulge in the hollow part of a metal plate article. It is an object of the present invention to provide a manufacturing method and an apparatus which can be performed.

[0007]

In order to achieve this object, the present invention provides a plastic moldable sheet-like material such as a wire mesh or a metal plate, which is brought into contact with one surface of the sheet-like material, and the other. In the method for producing an article, wherein the sheet-shaped material is plastically deformed into an appropriate shape by sandwiching the sheet-shaped material with a molding die that is in contact with the surface, at least the sheet-shaped material in either one of the two dies. The part contacting with is formed by an elastic body such as urethane rubber, or an elastic body such as urethane rubber is inserted between one of the two molds and the sheet material. In that state, the sheet material is sandwiched between the two molds.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show a filter 1 as an example of a wire mesh article, which is formed in a tubular shape and a zigzag cross section.
A mouthpiece 1 formed by doubly bending a ring made of a metal plate is fitted into the mouth portion 1a of the. This filter 1 is used by being attached to various conduits 3 as indicated by the one-dot chain line in FIG. The base 3 may be formed in a simple U-shaped cross section as shown in FIG.

The pressing device 5 and the processing steps for processing the filter 1 from the material wire net 4 are shown in FIGS. 3 to 10, which will be described below. The press device 5
Is a lower molding die (female) (hereinafter simply referred to as “lower die”) 7 attached to the base body 6, and an upper die (male die) attached to the lower surface of the ram 8 which can be raised and lowered via a disc 9. (Hereinafter referred to as “upper die”) 10, and the upper die 10 is formed to have an uneven cross-section with a flat cross section so as to be closely attached to the inner surface of the filter 1. A cutter 11 having a slightly large diameter is provided.

The lower die 7 is provided with a hole 12 having a diameter larger than that of the disc 9 to which the upper die 10 is attached.
An elastic body 13 formed by forming a soft or relatively soft elastic material such as urethane rubber into a ring shape is slidably and non-fallably fitted therein, and is also supported by the elastic body 13. 14 is fitted so as to be slidable up and down, and the pressing plate 14 is provided with a hole 14a into which the cutter portion 11 of the upper mold 10 can be fitted tightly.

The elastic body 13 has an inner diameter which is equal to that of the pressing plate 1.
The inner diameter of the upper mold 10 is slightly larger than the inner diameter of the upper mold 4, and the vertical length thereof is somewhat longer than the vertical length of the upper mold 10. Further, the vertical height dimension of the cutter portion 11 of the upper die 10 is set to be larger than the thickness dimension of the pressing plate 14. In the above configuration, while the belt-shaped material wire netting 4 is intermittently transferred in a certain direction on the lower mold 7, the transfer of the material wire netting 4 is stopped, and the material wire netting 4 is not fixed but is moved upward. When the mold 10 is lowered, the material wire mesh 4
7 is pushed into the lower mold 7 from the inner peripheral edge of the pressing plate 14 while wrinkling the pleats without changing the size of the mesh, and as shown in FIG. A part 4a of the material wire mesh 4 covering the upper mold 10
However, it is punched out by the shearing action of the cutter portion 11 and the pressing plate 14.

Then, when the pressing plate 14 is pushed down by the disc 9 to which the upper die 10 is attached, the elastic body 13 is moved to the position shown in FIG.
And, as shown in FIG. 9, it is deformed so as to bulge upward inward, and due to this inward bulging deformation, the portion 4a cut from the material wire net 4 is elastically bonded to the outer peripheral surface of the upper mold 10. Since the material wire netting 4a is pressed evenly by the upper mold 1
The filter 1 is obtained by bending into an uneven cross-sectional shape so as to follow the outer surface of No. 0.

In this process, when the material wire netting 4a is punched by the cutter portion 11 of the upper die 10 and the pressing plate 14, the punched material wire netting 4a is elastically restored by its own inner surface of the elastic body 13. Since it is in a stretched state, the punched material wire netting 4a does not fall off.
Next, when the upper die 10 descends to the bottom dead center and then rises, the vertical pressing force on the elastic ring 13 is released, so that the elastic ring 13 restores to its original shape by its elastic restoring force, and accordingly. The pressing plate 14 also rises to its original position.

The bent filter 1 is
Since the springback has a tendency to slightly expand outward in the radius direction, as shown in FIG. It drops toward the hole 6a. In this way, the filter 1 having a zigzag cross section can be continuously manufactured only by repeatedly lowering the upper die 10 toward the lower die 7 while intermittently transferring the material wire net 4 by a predetermined size. You can do it.

The number of concavities and convexities in the upper die 10 and the difference in height between the peaks and valleys are set so that the surface area of the outer surface of the upper die 10 is the same as the area of the portion 4a of the material wire net 4 to be removed. By setting the above, the mesh size of the filter 1 can be made uniform over the whole, so that the quality of the filter 1 can be remarkably improved, and that the filter 1 is bent in a zigzag cross section. As a result, the filtration area is significantly increased, so that the filtration performance can be dramatically improved.

The filter 1 manufactured by the above method is obtained by crushing the mouth 1a into a ring shape (or without crushing) and then fitting the mouthpiece 2 into the mouth 1a. Become a product. In the above-described embodiment, punching and bending from the band-shaped material wire netting 4 are carried out in series by the upper and lower reciprocating motions of the upper die 10, but shown in FIG. 11 as a second embodiment. As described above, the material wire netting 4a punched out in a circular shape in advance may be set in the lower mold 7, and only the bending process may be performed by the upper mold 10 and the lower mold 7.

In the second embodiment, the upper die 10 has a non-concavo-convex portion 1 having the same diameter as the circumscribed circle of the concavo-convex portion of the upper die 10.
0a is provided, and the edge portion of the material wire netting 4a is pressed against the shaft portion 10a via the upper portion of the elastic body 13,
The mouth portion 1a of the filter 1 is crushed into a ring shape (the same may be applied to the first embodiment). In both of the above embodiments, the elastic body 13 was provided on the lower die 7, but as shown in FIGS. 13 to 14 as the third embodiment, the inner peripheral surface of the lower die 7 has a flat cross-section unevenness ( The upper die 11 is formed in a zigzag shape, while the entire upper die 11 is formed of an elastic body 13 such as urethane rubber, and the upper die 11 is pressed downward to fill the lower die 7 with the elastic upper die 10. By doing this, the material wire mesh 4a
May be pressed radially outward against the inner peripheral surface of the lower mold 7.

In this case, the inner peripheral surface in the upper part of the lower die 7 is formed in the non-concave portion 7a, and the upper end of the material wire netting 4a is pressed against the non-concave portion 7a, whereby the filter 1
The mouth portion 1a is crushed into a ring shape (see FIG. 14B). In the case of this third embodiment,
The lower mold 7 is formed as a split mold that can be separated in the horizontal direction, and the filters 1 are bent while they are in close contact with each other, and when the bending is completed, they are separated from each other and the filter 1 is dropped downward. May be.

FIG. 15 shows a fourth embodiment, of which (a) is the case where the lower die 7 is provided with the ring-shaped elastic body 13 as in the first and second embodiments. The inner peripheral surface of the elastic body 13 is formed to have a cross-sectional shape similar to the cross-sectional shape of the upper mold 10. Further, FIG. When the die 10 is made of an elastic body 13, the cross-sectional shape of the upper die 10 (13) is formed to be similar to the cross-sectional shape of the lower die 7, and when formed in this way, the pressing force against the material wire netting 4a is increased. Has the advantage that it can be further equalized.

FIG. 16 shows a laminated filter in which a plurality of filter media 17 made of wire mesh or non-woven fabric are caulked and fixed by a metal plate frame ring 18 having a substantially U-shaped cross section. The cross-sectional shape of the frame ring 18 in the mold filter 16 is conventionally formed such that the gap between the upper surface plate and the lower surface plate is equal, as shown in FIG. 17B, and is shown in FIG. It was manufactured in process.

That is, the material metal plate 19 punched out in a ring shape is bent into a L-shaped cross section by a pressing device, and then pressed again to be bent into a U-shaped cross section, and this U-shaped shape is formed. Frame ring folded in 18
Then, the edges of the plurality of filter media 17 superposed on each other are inserted against the elasticity, and then the frame ring 18 is crushed by a pair of upper and lower molds.

By the way, when a plurality of filter media 17 are punched out to the same diameter and then stacked, the filter media 17 are often displaced as shown in FIG. 18 (a). The diameter D of each filter medium 17 is formed to be small so that the filter medium 17 can be inserted into the ring 18, which causes a problem that the holding strength of the frame ring 18 is small.

Further, as shown in FIG. 18 (b), the filter medium 1
Even when the outer peripheral edge of the filter medium 17 is thick due to the ball-shaped ends of the striations 17a forming the filter 7, the holding force of the frame ring 18 for the filter medium 17 was weak. With respect to this point, as shown in FIGS. 17A and 17A, the groove width of the frame ring 18 is increased at the radially outer portion, in other words, the bulge portion 18a is formed on the peripheral edge of the frame ring 18. Since the bulging portion 18a can absorb the displacement and the difference in the thickness of the filter medium 17 when the above is formed, the holding strength of the filter medium 17 by the frame ring 18 can be improved.

However, the bulging portion 1 can be formed as described above by simply pressing the material plate with the upper and lower dies in the usual press machine.
It could not be formed into a shape with 8a. However, by using the method of the present invention, the frame ring 18 having the bulge portion 18a can be easily manufactured. An example thereof is shown in the fifth embodiment of FIGS.

That is, first, as shown in FIG. 19, the material plate 19 is pressed by the pressing device 5 including the upper mold 10 and the lower mold 7.
In bending B to have an L-shaped cross section, first, a downward convex recess 20 is formed. Next, as shown in FIG. 20, the material plate 19 is attached to the lower mold 7, and the elastic body 13 made of urethane rubber or the like formed in a ring shape is fitted into the recess 20, or as shown in FIG. The disk-shaped elastic body 13 having a thick outer peripheral portion is fitted into the material plate 19, and in this state, the tubular portion 19a of the material plate 19 is pressed by the upper mold 10.

Then, since the cylindrical portion 19a of the material plate 19 is bent inward with the elastic body 13 clogged in the inner peripheral portion, the material plate 19 is bent along the lower surface of the upper mold 10, As a result, the frame ring 18 having the bulge portion 18a can be obtained. Then, after the bulge portion 18a is bent, the elastic body 13 is removed from the frame ring 18 against the elasticity. In this case, the elastic body 13
May be formed in half for easy removal.

FIG. 22 shows a bulge 21a at the bottom.
Is an article 21 made of a metal plate including:
The fifth embodiment shown in FIG. 23 can be easily manufactured. That is, first, by deep-drawing a single metal plate with a pair of upper and lower press dies, a bottomed cylindrical intermediate product 22 having groove widths formed at equal intervals is formed. ,
While being fitted into the lower mold 7 having the lateral recesses 7b, the elastic body 13 is permanently attached to the lower part of the upper mold 10 and the elastic body 13 is pushed into the intermediate product 22. The bulge 21a is formed, and then the upper mold 10 is pulled up.

By the same method as in the sixth embodiment, for example, a flask-shaped article or a gourd-shaped article can be manufactured extremely easily by pressing one metal plate twice. Incidentally, in this sixth embodiment, the article 21
The lower mold 7 is formed in two split molds so as to approach and separate in a direction orthogonal to the paper surface so that the lower mold 7 can be removed.

[0029]

As described above, according to the present invention,
Bending process of sheet material such as wire mesh and steel plate into desired shape by utilizing elastic deformation of elastic body such as urethane rubber, without changing the roughness of the wire mesh. Bending deformation to the cross-sectional shape of the metal plate or forming a bulge in the hollow part of the metal plate article can be performed extremely easily by using a simple press device, etc. It has an effect that a high wire mesh filter and an article made of a metal plate having a bulge portion can be manufactured at extremely low cost.

[Brief description of drawings]

FIG. 1 (a) is a perspective view of a wire mesh filter, and FIG. 1 (b) is an exploded perspective view of the wire mesh filter.

2 (a) is a sectional view taken along line IIa-IIa of FIG. 1 (a),
FIG. 1B is a sectional view taken along the line IIb-IIb of FIG. 1A, and FIG. 1C is another example of a base.

FIG. 3 is a diagram according to the first embodiment and is a diagram showing a press device for manufacturing the filter in FIGS. 1 and 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a plan view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a diagram showing a process of processing a filter.

FIG. 8 is a diagram showing the next process of FIG. 7;

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a diagram showing the next step of FIG. 9;

FIG. 11 is a diagram showing a pressing device according to a second embodiment.

12 is a sectional view taken along line XII-XII of FIG.

FIG. 13 is a diagram showing a pressing device according to a third embodiment.

14A is a sectional view taken along line XIVa-XIVa of FIG.
(B) is a XIVb-XIVb sectional drawing of FIG.

FIG. 15 is a diagram showing a fourth embodiment.

FIG. 16 is a perspective view of a laminated filter.

FIG. 17 is a cross-sectional view showing the form of the frame ring of the filter in FIG. 16 and a view showing a processing step, (a)
(A ') is a diagram of a desirable form, and (b) and (b') show a conventional example.

18 (a) is a diagram showing an overlapping state of filter media of the filter in FIG. 16, and FIG. 18 (b) is a diagram showing an example of end portions of striations in the filter media.

FIG. 19 is a diagram showing a first stage of a processing step of the frame ring in FIG. 17 (a).

FIG. 20 is a diagram showing a step subsequent to that in FIG.

FIG. 21 is a diagram when the same step as in FIG. 20 is performed by another means.

FIG. 22 is a perspective view of another form of article that can be manufactured by the present invention.

FIG. 23 is a view showing the fifth embodiment and is a drawing showing the manufacturing process of the article in FIG. 22;

[Explanation of symbols]

 1 Wire mesh filter 2 Filter mouthpiece 4 Material wire mesh 5 Filter device 7 Lower mold 8 Ram 10 Upper mold 11 Cutter part 13 Elastic body 14 Press plate 16 Laminated filter 18 Frame ring 18a Frame ring bulge part 21 Metal plate Product 21a Bulging part

Claims (2)

[Claims] 1. A plastic-deformable sheet-shaped material such as a wire mesh or a metal plate is clamped between a molding die that contacts one surface of the sheet-shaped material and a molding die that contacts the other surface of the sheet-shaped material. ,
In a method of manufacturing an article in which a sheet-shaped material is plastically deformed into an appropriate shape, at least a portion of one of the two molds that contacts the sheet-shaped material is formed of an elastic body such as urethane rubber. Or insert an elastic body such as urethane rubber between one of the two molds and the sheet-shaped material, and press the sheet-shaped material with both molds in that state. The method for producing an article made of a sheet material, comprising: 2. A plastically deformable sheet-shaped material such as a wire mesh or a metal plate is clamped by a first die that contacts one surface of the sheet-shaped material and a second die that contacts the other surface. By
A manufacturing apparatus for an article, which is configured to plastically deform a sheet-shaped material into an appropriate shape, wherein at least a portion of one of the two molds that comes into contact with the sheet-shaped material is an elastic body such as urethane rubber. An apparatus for manufacturing an article made of a sheet-shaped material, which is characterized by being formed by.