JPH0360886A - Manufacture of cupped gauze filter - Google Patents

Abstract

PURPOSE:To obtain a cupped gauze filter having high reliability by laminating two sheets of the gauzes, projecting high energy density beam along welding line forming three-way edges in flat bag body, forming the flat bag body and forming opening as cupped-state. CONSTITUTION:The gauzes 1, 2 are laminated and the high energy density beam 23 of light beam from an light beam heating apparatus or electron beam from an electron beam heating apparatus, etc., is applied on these along the welding line 3 for forming three-way edges in the flat bag body 6. Two gauzes 1, 2 are melted, and by shifting this beam 23 along the welding line 3, the welding and cutting are continuously executed at the same time. Welded bead B is formed along the welding line 3 to form the flat bag body 6 opened at one side edge part as the opening edge 5. Successively, the opening edge 5 is opened to form the cupped shape and the cupped bag body 7 is formed. By this method, the cupped gauze filter hardly developing weak position in the gauze and deformation of the net, can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a cup-shaped wire mesh filter to be attached to fuel piping of an automobile.

<Prior Art> Conventionally, a cup-shaped wire mesh filter 50 as shown in FIG. 15 has been installed in fuel piping of automobiles and the like.

Such a cup-shaped wire mesh filter 50 is made by deep drawing a flat wire mesh 51 using a punch 55 and a die 56 to form it into a cup shape, as shown in FIG. A cap 54 was attached to the opening. However, in this cup-shaped wire mesh filter 50, creases 52 due to deep drawing occur irregularly, creating weak points in the wire mesh, and the mesh becomes deformed and becomes larger.

Therefore, the same applicant as the present application is
In No. 551, a method for manufacturing a wire mesh filter was proposed in which regularly set fold lines are formed in a flat wire mesh and then formed into a cup shape. However, in this method of manufacturing a cup-shaped wire mesh filter, it is difficult to center the fold line and the punch, which causes variations, and it is therefore necessary to take the trouble of checking for irregular wrinkles after drawing.

Therefore, as shown in FIGS. 17A, B, and C to FIG. The beam 23 is irradiated along the welding line 63 (FIG. 17B), and the bent wire mesh 61 is simultaneously welded and cut to form a flat bag body 66 (FIG. 17C). In recent years, a method of manufacturing a cup-shaped wire mesh filter in which a cup-shaped bag body 67 is formed by expanding the wire mesh filter (FIG. 18) has also come into use.

<Problems to be Solved by the Invention> In such a welded cup-shaped wire mesh filter, when the cup-shaped bag body 67 is formed, the welding process length can be reduced by allowing the bent portion 62 of the gold 1i161 to form part of the filter as it is. (The length of weld bead B) was considered to be shortened. However, if the wire mesh is bent too strongly, the wires of gold W461 may exceed their elastic limit and crack, which significantly reduces the function as a filter.

Therefore, if the wire mesh 61 is bent within its elastic limit,
There was a problem in that a gap was likely to occur inside the folded portion 62.

Therefore, even if the wire mesh 61 melts when the bent gold w461 is irradiated with a high energy density beam 23 such as a light beam, the molten metal of the upper and lower wire meshes 61 will not fuse with each other at the origin of the gap. First, there is a problem in that poor welding occurs as shown in FIG. 19.

This invention was made to solve the above-mentioned problems, and provides a method for manufacturing a highly reliable cup-shaped wire mesh filter that maintains the uniformity of the mesh and prevents the occurrence of welding defects at the welded portion. The purpose is to

Means for Solving the Problems> This invention has been made to achieve the above object, and the method for manufacturing a cup-shaped wire mesh filter of the first invention is to overlap two wire meshes and to A high energy density beam is irradiated along the welding lines forming the three peripheries of the flat bag, welding and cutting the two wire meshes to form a flat bag, and then the flat bag is cupped. An opening is formed in the shape.

The method for manufacturing a cup-shaped wire mesh filter according to the second invention is to overlap two wire meshes, apply a metal filler along the welding lines forming the three peripheries of the flat bag, and then apply a high-grade metal filler on the metal filler. An energy density beam is irradiated to weld and cut the two wire meshes to form a flat bag, and then a cup-shaped opening is formed in the flat bag.

<Function> In the first invention, since the two wire meshes can be easily overlapped without any gaps, the irradiation energy of the high energy density beam from above is absorbed by the upper wire mesh and is surely transmitted to the lower wire mesh. The molten metal is transferred to the wire mesh, and the molten metal from both wire meshes fuses together, allowing for sound welding.

In the second invention, two wire meshes can be easily overlapped without any gaps, and even in the case of a coarse mesh wire mesh, the gaps between the strands of the wire mesh are filled by melting the metal filler,
This enables sound welding of two wire meshes.

<Example> First, the present invention will be explained in detail.

The method for manufacturing a cup-shaped wire mesh filter according to the present invention is as follows:
As shown in the figure, wire meshes 1.2 are overlapped, and a light beam from a light beam heating device or an electron beam from an electron beam heating device A high energy density beam 23 (hereinafter abbreviated as beam 23) is irradiated. Note that 22 is a condensing lens.

The irradiated beam 23 is absorbed by the surface of the wire mesh 1 and becomes thermal energy, and this heat is conducted to the wire mesh 2 to form two pieces of gold 1i! 11.2 melts. This beam 23 is connected to the welding line 3
Welding and cutting are performed simultaneously and continuously by moving the blade along the .

Then, as shown in FIG. 2, a weld bead B is formed along the weld line 3 to form a flat bag body 6 whose one edge is open as an opening edge 5.

Next, the opening edge 5 is expanded to form a cup-shaped opening, and a third opening is formed.
A cup-shaped bag body 7 as shown in the figure is formed.

Hereinafter, an embodiment of the present invention will be explained in detail with reference to FIG. 4, which shows an upper die 25. An example of the lower mold 28 is shown.

Upper mold 25. Each of the lower molds 28 is provided with through holes 26 and 29 each having a planar U-shape and having an inner edge shape that matches the shape of the welding line 3 forming the three peripheral edges of the flat bag body 6.

In the experimental example, the wire mesh 1.2 is made of a stainless steel material with a wire diameter of 35 μm, and a wire mesh of mesh 325 is used in each length and width of 1 inch. Two wire meshes are overlapped and placed on the lower mold 28.

At this time, as shown in FIG.
It is placed a little further back than the tip end 29a. By superimposing the upper die 25 on top of it, the through hole 26.2
9 are aligned vertically, and their inner edges are aligned with the weld line 3, so that the wire meshes 1.2 are overlapped without any gaps.

Next, the gold M41, 2 is irradiated with the beam 23 from above by passing through the through hole 26 of the upper die 25 (see FIGS. 5 and 6). Note that during welding, oxidation is prevented by creating a vacuum or an inert gas atmosphere such as argon gas around the welding area.

It is desirable to adjust the irradiation of the beam 23 to a position where the beam irradiation range A (spot diameter) touches the inner edge of the through hole 26, as shown in FIGS. 6 and 7. The wire mesh 1.2 is then irradiated with the beam 23 having sufficient power.
The metal is melted in the irradiation range A, and the molten metal contracts from the center of the irradiation range A due to surface tension and solidifies to form a weld bead B. Subsequently, it moves either on the beam 23 or the wire mesh 1.2 side, By moving the irradiation position of the beam 23 along the inner edge of the through hole 26, that is, along the weld line 3, weld beads B can be formed continuously. Through this series of work,
The two wire meshes 1.2 are welded and cut at the same time, and a flat bag 6 (see FIG. 2) having an open edge 5 can be manufactured.

In the experimental example, when the output of the beam 23 is 50 W or more and the diameter of the irradiation range A is in the range of 1.0 to 5.0 mIn, the width of the welding bead B can be kept at a size that makes it easy to caulk to the cap 8, and favorable results can be obtained. It was done. Note that the diameter of irradiation range A is 1.0 ff1
If it is less than m, weld bead B becomes discontinuous, and
If it exceeds 5.0 (2), the width of the weld bead B becomes wider and its variation becomes larger. Furthermore, the shape of the irradiation range A is suitably circular. This is because the shape of the beam 23 has no directionality with respect to its moving direction. Also, beam 23
The irradiation position is the position where the inner edge of the through hole 26 and the outer periphery of the irradiation range A are in contact with each other, thereby stabilizing the width of the weld bead B and making it possible to perform good welding.

Next, the opening edge 5 of the flat bag 6 is opened, and a cylindrical bottle (not shown) or the like is inserted therein to form a cup-shaped opening (see FIG. 3), thereby forming a cup-shaped bag 7. do. Note that the cup-shaped opening may be formed by pressing the weld beads B at both ends of the opening edge 5 inwardly.

Then, a double tubular base 8 is placed over the opening edge 5 of the cup-shaped bag body 7 and fixed by caulking to obtain a cup-shaped wire mesh filter 10 (see FIGS. 8 and 9).

10 to 12 show another embodiment of the present invention, which is characterized in that a preliminary opening is formed at the opening edge of the flat bag. In the following description, the same reference numerals are given to the same parts as those in the first embodiment, and the description thereof will be omitted.

In this second embodiment, the opening edge 5 of the flat bag body 16 is processed to form a preliminary opening 15 to facilitate expansion of the opening edge 5. This flat bag body 16 includes a conical bottle 30 for forming the preliminary opening 15 and a bottle 30.
It is manufactured by an upper mold 25 having a recess 31 provided corresponding to the upper mold 25 and a lower mold 28 having a recess 32 as well.

When the wire meshes 1 and 2 are overlapped, the pin 30 is sandwiched between them, and then the wire meshes 1 and 2 are placed between the upper mold 25 and the lower mold 28.
They are overlapped without any gaps and welded in the same manner as in the first embodiment. As a result, as shown in FIG. 12, a flat bag 16 having a hollow preliminary opening 15 at the opening a5 can be obtained. By forming this preliminary opening 15, the opening edge 5
can be expanded very easily.

FIG. 13 shows a third embodiment of the present invention, which is characterized in that welding is performed by applying a metal filler along the weld line.

In this third embodiment, the metal filler 12 is applied along the welding line -3, and the metal filler 12 is irradiated with a beam 23 to weld the wire meshes 1 and 2.

The metal filler 12 is desirably a paste made by kneading powder of the same metal as the material forming the wire mesh 1.2 with a 1% aqueous polyvinyl alcohol solution. By applying this metal filler 12, a paste-like substance is filled between the meshes of the wire meshes 1 and 2, and is melted by the beam 23 irradiation to create a kind of molten pool, and the wire meshes 1.2 are welded.

According to this manufacturing method, sound welding can be performed even on a wire mesh with a coarse mesh.

Note that this invention is not limited to the above description and aspects, and its embodiments can be changed without departing from the technical idea of this invention. for example,
As shown in FIG. 14, the two wire meshes are made by bending one wire mesh to form an upper metal mesh 1111a and a lower mold metal [1b], with the folded line 1c positioned outward from the through hole 26.29. Even if welding is performed, similar actions and effects can be obtained.

<Effects of the Invention> As explained above, the method for manufacturing the cup-shaped wire mesh filter of the present invention involves superimposing two wire meshes and applying high-energy density welding from above along the welding lines forming the three peripheries of the flat bag. A beam is irradiated to weld and cut the two wire meshes to form a flat bag, and then a cup-shaped opening is formed in the flat bag, so the two wire meshes are overlapped without any gaps and are healthy. Can perform welding.

Therefore, unlike the conventional example, there is no need for the step of bending a single sheet of wire mesh, and furthermore, it is possible to prevent the occurrence of defective welding due to gaps that tend to occur at the folded portion.

In addition, since there is no deep drawing process for cup-shaped wire mesh, there are fewer weak points in the wire mesh and less deformation of the mesh, and combined with sound welding, a highly reliable cup-shaped wire mesh filter can be obtained. In-process defects can be reduced during manufacturing.

Further, by applying the metal filler along the weld line, it is possible to perform sound welding even on a coarse wire mesh.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing an outline of the manufacturing method of the cup-shaped wire mesh filter of the present invention, and FIG. 1 is an explanatory diagram of irradiation of a high energy density beam to two overlapping wire meshes, 342 Figure 3 is a perspective view showing a flat bag; Figure 3 is a perspective view showing a cup-shaped bag with an opening; Figures 4 to 9 are explanatory views showing an embodiment of the cup-shaped wire mesh filter of the present invention. Fig. 4 is a perspective view showing the overlapping of two wire meshes, Fig. 5 is a side view, Fig. 6 is a plan view, Fig. 7 is a partially enlarged view of the X part in Fig. 6, FIG. 8 is a perspective view showing how the cap fits into the cup-shaped bag body. FIG. 9 is a perspective view of the cup-shaped wire mesh filter. FIG. 10 is an explanation showing how two wire meshes are overlapped in the second embodiment. Figure 11 is a side view, Figure 12 is a perspective view of a flat bag having a preliminary opening, Figure 13 is a plan view illustrating the application of metal filler in the third embodiment, and Figure 14 is a side view. FIG. 15 is a perspective view illustrating a modified example of overlapping wire mesh; FIG. 15 is a perspective view of a cup-shaped wire mesh filter produced by conventional probe drawing processing; FIG. 16 is a side sectional view illustrating deep drawing processing; Figures A, B, C to Figure 19 are diagrams showing an outline of the manufacturing method of a cup-shaped wire mesh filter by conventional welding.
Figure 7A is an explanatory diagram showing the bending of the wire mesh, Figure 17B is also an explanatory diagram of beam irradiation, Figure 17C is a perspective view showing the same conventional flat bag, and Figure 18 is the same cup-shaped bag. FIG. 19 is an enlarged view of the Y portion of FIG. 18. 1.2...Wire mesh, 3...Welding line, 6...Flat bag body, 7...Cup-shaped bag body, 10...Cup-shaped wire mesh filter, 2...Metal filler 5...・Preliminary opening. Patent Applicant: Aisan Kogyo Co., Ltd. Chazu No. 1"-5 Figure No. 5? Bow No. 5 Figure 6 Figure 7 Figure B Figure 8 Figure 7 Figure A Figure 9

Claims (1)

[Claims] 1) Two wire meshes are overlapped, and a high energy density beam is irradiated from above along the welding lines forming the three peripheries of the flat bag to weld and melt the two wire meshes. A method for manufacturing a cup-shaped wire mesh filter, comprising: forming a flat bag by performing the following steps, and then forming an opening in the flat bag into a cup shape. 2) Overlap the two wire meshes, apply metal filler along the welding lines forming the three peripheries of the flat bag, and then irradiate the metal filler with a high energy density beam to separate the two wire meshes. A method for manufacturing a cup-shaped wire mesh filter, comprising: forming a flat bag by welding and cutting, and then forming an opening in the flat bag into a cup shape.