JPS63185456A - Production of metal honeycomb carrier - Google Patents

Abstract

PURPOSE:To easily fix a corrugated sheet and a flat sheet by piercing through- holes beforehand in the corrugated sheet and the flat sheet so that all the through-holes are positioned on the same line at the time of forming a core part, then forming the core part, and allowing a wire to insert into the through- holes on the same line. CONSTITUTION:The metallic corrugated sheet 33 and the flat sheet 35 are laminated, the laminate is wound in plural layers to form the core part 31, and then the corrugated sheet and the flat sheet are fixed to each other. In this case, the through-holes 411, 412, 431, and 432 are pierced beforehand in the corrugated sheet 33 and the flat sheet 35 so that the through-holes are positioned on the same line at the time of forming the core part 31. The corrugated sheet and the flat sheet are wound in multiple layers to form the core part, the wire 37 is then inserted into the through-holes, and the corrugated sheet and the flat sheet are fixed to each other. As a result, the corrugated sheet and the flat sheet can be easily fixed to each other without deteriorating the purification efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a metal honeycomb carrier used in a catalytic converter.

[Conventional technology]

Generally, a metal honeycomb carrier as disclosed in Japanese Patent Publication No. 60-27807, for example, is disposed in the exhaust system of an automobile in order to purify exhaust gas.

FIGS. 7 and 8 show details of this type of metal honeycomb carrier. This metal honeycomb carrier consists of corrugated metal plates 11 and flat plates 13 stacked alternately, and these are arranged around a core material. Then, the temporary core portion 15 as shown in FIG. 7 is formed by multiple winding in a circular shape. This temporary core portion 15 is pressed in the vertical direction to form an elliptical core portion 17 as shown in FIG.

In such a core part 17, if the corrugated plate 11 and the flat plate 13 are left wound together, the exhaust gas will flow into the core part 17, causing the corrugated plate 1 located at the center of the core part 17 to
1 and the flat plate 13 protrude in the axial direction of the core portion 17, a so-called film-out phenomenon occurs.
After forming the corrugated plate 11 and the flat plate 13, the corrugated plate 11 and the flat plate 13 are fixed to each other.

FIG. 9 shows an example of a conventional fixing method. In this fixing method, after the core part 17 is housed in the outer cylinder 19, a through hole is bored through the outer cylinder 19 and the core part 17. After inserting the pin 21 into this through hole, the corrugated plate 11 and the flat plate 13 are fixed to each other by welding 23 the pin 21 to the outer cylinder 19.

[Problem that the invention seeks to solve]

However, in such a conventional fixing method, a relatively large-diameter pin 21 is inserted into the core portion 17, and the pin 21 blocks the exhaust gas passage, reducing the exhaust gas purification performance. There is a problem.

Further, although both ends of the pin 21 are fixed to the outer cylinder 19 by welding, a relatively large gap is formed between the pin 21 and the through hole for inserting the pin 21. There is a risk of exhaust gas leaking from the

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and provides a method for manufacturing a metal honeycomb carrier in which corrugated plates and flat plates can be easily fixed to each other without deteriorating purification performance. The purpose is to

[Means for solving problems]

The method for manufacturing a metal honeycomb carrier according to the present invention involves stacking a metal corrugated plate and a flat plate, winding them in multiple layers to form a core part, and then fixing the corrugated plate and the flat plate to each other. In the method for manufacturing a carrier, through holes are drilled in advance in the corrugated plate and the flat plate at positions where all the through holes are lined up on the same line when forming the core part, and then these corrugated plates and the flat plate are stacked. A core portion is formed by winding the corrugated plate and the flat plate, and then wires are inserted through the through holes arranged on the same line to fix the corrugated plate and the flat plate to each other.

[Action of the invention]

In the method for manufacturing a metal honeycomb carrier of the present invention, through holes are drilled in advance in a corrugated plate and a flat plate at positions where all the through holes are lined up on the same line when forming the core part, and then these corrugated plates are and a flat plate are wound multiple times to form a core portion. Then, wires are inserted through the through holes arranged on the same line, and the corrugated plate and the flat plate are fixed to each other.

That is, the wire prevents the corrugated plate and the flat plate from shifting in the axial direction, thereby reliably preventing the film-out phenomenon.

Further, since the diameter of the wire is smaller than that of the pin, the exhaust gas passage is not significantly blocked by the wire, and a decrease in exhaust gas purification performance can be prevented.

Furthermore, in the method of the present invention, before forming the core part, through holes are drilled in the corrugated plate and the flat plate at positions where all the through holes are lined up on the same line when forming the core part. There is no need to form a through hole for inserting the wire after formation, and the through hole can be formed quickly and easily.

[Embodiments of the invention]

Hereinafter, details of the method of the present invention will be described with reference to the drawings and examples thereof.

FIG. 1 shows a metal honeycomb carrier manufactured by an embodiment of the method of the present invention, and in the figure, reference numeral 31 indicates
A core portion having an elliptical cross-section formed by overlapping a metal corrugated plate 33 and a flat plate 35 and winding them multiple times is shown.

In this metal honeycomb carrier, a wire 37 made of stainless steel, for example, is inserted in a direction perpendicular to the axial direction of the core part 31, and the corrugated plate 33 and the flat plate 35 are interconnected by this wire 37. Fixed.

That is, as shown in FIG. 2, the core part 31 has a pair of through holes 41. at a constant interval in the axial direction of the core part 31.
43 is formed. In addition, in this metal honeycomb carrier, the through holes 41.43 are formed on the short axis of the elliptical core portion 31.

Then, the wire 37 has its tip inserted through one of the through holes 41 from the upper surface of the core section 31 , passes through the lower surface of the core section 31 , and is inserted into the other through hole 43 . The tip and rear ends of the wire 37 are connected by welding 45.

Note that it is desirable that the wire 37 has a high tensile strength and a diameter as small as possible.

The metal honeycomb carrier constructed as described above is manufactured using the method of the present invention as described below.

In the method of the present invention, as shown in FIG.
1, all the through holes 411, 412, 431, 43 are formed in the corrugated plate 33 and the flat plate 35 when forming the core part 31.
The through holes 411, 412,
431 and 432 are drilled.

That is, the corrugated plate 33 is formed with through holes 411.431, while the flat plate 35 is formed with through holes 412.432.

These through holes 411, 412, 431, and 432 are formed by machining using a forming roller or by a non-contact fusing method such as electron beam fusing or laser beam fusing.

Further, in this embodiment, the through hole 411. ．． 412°43
1.432 is made by stacking corrugated plates 33 and flat plates 35 alternately, winding them multiple times in a circular shape around a core material, and when pressed, the neutral axis (short It is formed so as to be located on the axis) N.

In this way, the through holes 411, 412, 431° 432
As shown in FIG. 3, the corrugated plates 33 and the flat plates 35 are stacked alternately and wound multiple times in a circular shape around the core material. Thereafter, the vertical direction is pressed in the direction of the neutral axis N, and the elliptical core part 3 as shown in FIG.
1 is formed.

In the core portion 31 thus formed, as shown in FIG. 2, a through hole 41 is formed by the through holes 411 and 412, and a through hole 43 is formed by the through holes 431 and 432.

Thereafter, the wire 37 is inserted into the through hole 41.43, and both ends of the wire 37 are connected to produce a metal honeycomb carrier.

As described above, in the method of the present invention, the corrugated plate 33 and the flat plate 3
5, when forming the core part 31, all the through holes 411,
After the through holes 411, 412.431.432 are drilled in advance at the positions where the holes 412, 431.432 are lined up on the same line,
These corrugated plates 33 and flat plates 35 are wound multiple times to form the core portion 31. Then, the wires 37 are inserted into the through holes 41 and 43 arranged on the same line, and the corrugated plate 3
3 and the flat plate 35 are fixed to each other.

That is, in the method of the present invention, the corrugated plate 3 is
3 and the flat plate 35 in the axial direction, thereby reliably preventing the film-out phenomenon.

Further, since the diameter of the wire 37 is smaller than that of the pin, the exhaust gas passage is not significantly blocked by the wire 37, and a decrease in exhaust gas purification performance can be prevented.

Furthermore, in the method of the present invention, before forming the core part 31, the corrugated plate 33 and the flat plate 35 are pre-pierced in a position where all the through holes 411, 412, 431, 432 are lined up on the same line when forming the core part 31. Since the holes 411, 412, 431, and 432 are formed, there is no need to form a through hole for inserting the wire 37 after forming the core part 31, and the through hole 4
1.43 can be formed quickly and easily.

Furthermore, since the diameter of the wire 37 is smaller than that of the pin, there is no need to increase the diameter of the through holes 41 and 43.
Leakage of exhaust gas from the through holes 41, 43 can be reduced.

FIG. 4 shows another metal honeycomb carrier manufactured by the method of the present invention, in which the tip 51 and rear end 53 of the wire 37 are connected to the core 31
They are joined to the upper surfaces of each by welding 55° and 57, respectively.

FIG. 5 shows still another metal honeycomb carrier manufactured using the method of the present invention, in which the core portion 3
1, three wires 37 are inserted through it at regular intervals in the longitudinal direction, and the corrugated plate 33 and the flat plate 35 are connected by these three wires 37.

FIG. 6 shows another metal honeycomb carrier manufactured by the method of the present invention. In this example, a pair of through holes 59, 61 are formed by the method of the present invention at regular intervals in the short axis direction of the core portion 31. The wire 37 is inserted through these through holes 59 and 61.

In addition, in the embodiment described above, an example was described in which the method of the present invention was applied to an elliptical core portion 31, but the method of the present invention is not limited to such an embodiment. Of course, it can also be applied to parts.

Further, in the embodiment described above, an example was described in which the through holes 41 and 43 were formed in the short axis direction of the elliptical core portion 31, but the method of the present invention is not limited to such an embodiment, For example, it is of course possible to form through holes at regular intervals in the longitudinal direction.

Further, in the embodiments described above, an example was described in which the wires 37 were connected by welding, but the method of the present invention is not limited to such embodiments; for example, the wires 37
It goes without saying that the leading end and the rear end may be entwined and connected.

〔Effect of the invention〕

As described above, in the method for manufacturing a metal honeycomb carrier of the present invention, after through-holes are pre-drilled in the corrugated plate and the flat plate at positions where all the through-holes are lined up on the same line when forming the core part, These corrugated plates and flat plates are wound multiple times to form a core part, and then wires are inserted through the through holes lined up on the same line, and the corrugated plates and flat plates are fixed to each other, so that the exhaust gas can be removed. There are advantages in that the film-out phenomenon can be reliably prevented without causing a decrease in gas purification performance, and that the through holes can be formed quickly and with high precision.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a metal honeycomb carrier manufactured by the method of the present invention, FIG. 2 is a perspective view showing a core portion with through holes formed therein, and FIG. FIGS. 4 to 6 are perspective views showing other examples of metal honeycomb carriers manufactured by the method of the present invention, and FIG. 7 is a perspective view showing a state in which a plate and a flat plate are wound. FIG. 8 is a perspective view showing an elliptical core portion, and FIG. 9 is a cross-sectional view showing a metal honeycomb carrier in which a corrugated plate and a flat plate are fixed with pins. be. 31... Core part, 33... Corrugated plate, 35... Flat plate,
37...Wire, 41.43, 411°412.43
1,432...Through hole. Figure 11 Figure #42 Figure 3 Figure 4 Figure 6 #IP, Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] In the method for manufacturing a metal honeycomb carrier, in which a corrugated metal plate and a flat plate are stacked, a core sieve is formed by winding them in multiple layers, and then the corrugated plate and the flat plate are fixed to each other. At the time of forming the core part, through holes are drilled in advance at positions where all the through holes are lined up on the same line, and then these corrugated plates and flat plates are wound in multiple layers to form the core part. A method for manufacturing a metal honeycomb carrier, characterized in that the corrugated plate and the flat plate are fixed to each other by inserting wires into through holes arranged on the same line.