JPH04135644A - Heat-resistant structure body and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a high-strength and heat-resistant structure body which can be easily produced without forming a large space in a center part by using specified constitutional elements in a rolled state and joining each devided constitutional element integrally. CONSTITUTION:Respective constitutional elements 3, 4 where when the devided element are collected integrally an oval cross section shows an ellipse are formed. Namely, the mother material consists of a metal corrugated plate 1 in a strip state having continuous corrugation pattern and a flat strip metal plate 2, and is taken-up on roll cores 5, 6, having a similar shape as the outside shape of the constitutional elements 3, 4. Thus, the plate material 1, 2 are alternately taken-up on the core to form the constitutional elements 3, 4. Thus, unnecessary space in the center part is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a heat-resistant structure used in a high-temperature environment.

In other words, it is a cylindrical, honeycomb-structured heat-resistant structure in which corrugated metal sheets and flat metal base materials are alternately wound, and the overall cross-sectional shape is approximately elliptical. The present invention relates to a heat-resistant structure used in a catalytic converter for purifying gas, to which a catalyst is attached as a carrier.

"Prior Art" Conventionally, the following types of heat-resistant structures have been used.

First, one band-shaped metal corrugated sheet material and one flat metal sheet material,
A heat-resistant structure was used in which the wires were wound alternately from a fixed center so that the overall cross-sectional shape was approximately elliptical. In other words, a heat-resistant structure having a honeycomb structure having a circular cross-sectional shape as a whole is manufactured by appropriately applying a conventional manufacturing method.

Second, multiple corrugated metal sheets and flat metal sheets are used, and multiple sets of these are stacked alternately, core rings are placed on top and bottom of the sheets, and then the core rings are folded back in the same direction around both core rings. A heat-resistant structure with an approximately elliptical overall cross-sectional shape was used, which was manufactured by following a special and unique process of forming an S-curve shape.

Third, the same heat-resistant structure was used, which was manufactured using corrugated metal sheets and flat metal sheets, and through other special and unique processes.

These honeycomb heat-resistant structures whose overall cross-sectional shape is approximately oval are called oval types, and this oval type has a variety of types compared to the conventional track field type. It has better performance and has been increasingly used recently.

"Problems to be Solved by the Invention" By the way, the following problems have been pointed out in such conventional heat-resistant structures whose overall cross-sectional shape is approximately elliptical.

First, in the heat-resistant structure according to the first conventional example,
as follows. In other words, in a heat-resistant structure wrapped from a fixed center, a large space is inevitably formed in the center due to molding, and as a result, when used as a carrier for a catalytic converter, for example, the cleaning rate of exhaust gas is reduced in the center. Problems such as a decline in performance were pointed out.

Next, the second. The heat-resistant structure according to the third conventional example is as follows. In other words, this heat-resistant structure having a substantially S-curve shape is manufactured through a special and unique process, and its molding is complicated, extremely troublesome, and time-consuming, making it difficult to manufacture and commercialize and industrialize. .

This point was pointed out in the conventional example.

In view of the above circumstances, the present invention has been made to solve the problems of the conventional example described above, and uses predetermined constituent elements wound in a roll shape to integrally integrate each divided constituent element. We propose a heat-resistant structure and its manufacturing method that (1) eliminates the formation of a large space in the center), (2) is easy to manufacture, and (3) has excellent strength. The purpose is to

"Means for Solving the Problem" The technical means of the present invention to achieve this object are as follows.

First, claim 1 is as follows. In other words, this heat-resistant structure consists of a metal corrugated sheet material in which corrugated irregularities are continuously bent to form a belt shape, and a flat metal sheet material in a flat belt shape, which are alternately wrapped around each other, and the overall cross-sectional shape is It consists of a honeycomb structure with an almost oval shape.

The heat-resistant structure is formed by integrally joining each divided component. Each of the constituent elements has a roll shape in which the corrugated plate material and the flat plate material are wound alternately from a fixed center in accordance with the respective outer shapes.

Claim 2 is as follows. That is, this method of manufacturing a heat-resistant structure includes the following component forming step and molding step.

In the component forming step, each component is formed by dividing a component whose overall cross-sectional shape is approximately elliptical when assembled integrally. Then, a metal corrugated sheet material having a band-like shape in which corrugated irregularities are continuously bent and a flat metal sheet material forming a flat band-like shape are attached to each winding core that has a similar shape to the external shape of each component. Each component is formed by alternately winding up each component into a roll shape.

In the molding process, the respective components are then integrally joined to form a honeycomb-structured heat-resistant structure having a generally elliptical overall cross-sectional shape.

"Function" Since the present invention consists of such means, it works as follows.

First, the heat-resistant structure of claim 1 includes each divided component,
In other words, each component made of a corrugated sheet material and a flat sheet material wound in a predetermined manner is integrally joined to form a honeycomb structure with an approximately elliptical overall cross-sectional shape. Moreover, in the manufacturing method of claim 2, the heat-resistant structure is manufactured by following the component forming step and the molding step. That is, after each component is formed by winding a corrugated sheet material and a flat sheet material around a winding core in a predetermined manner, a predetermined heat-resistant structure is obtained by integrally joining each component.

First, since this heat-resistant structure is formed by integrally joining each divided component, a large space is not formed in the center.

Secondly, this heat-resistant structure is easily manufactured by joining each component that has been wound through a component forming process and a molding process.

Thirdly, since this heat-resistant structure is made up of a collection of divided components, the generated thermal stress is dispersed among the components, and the structure is particularly excellent in overall strength.

"Example" The present invention will be described in detail below based on the example shown in the drawings.

The drawings provide a detailed explanation of the invention. First, regarding the manufacturing method, the component forming process.

The molding process will be explained in order, and then the heat-resistant structure will be explained.

The component forming process is as follows.

FIG. 1 is a perspective view showing the base material, in which (1) the corrugated sheet material 1 is shown and (2) the flat sheet material 2 is shown. FIG. 2 is a schematic front sectional view showing each component 3.4 for explaining the component forming process.

In the component forming step, each of the components 3 and 4 is formed by dividing components whose overall cross-sectional shape is approximately elliptical when assembled integrally. That is, first, as the base materials, a metal corrugated sheet material 1 in which corrugated irregularities are continuously bent and formed into a belt shape, and a metal flat sheet material 2 in a flat belt shape are prepared (Fig. 1). reference). And these corrugated sheet materials 1
and the flat plate material 2 are alternately wound into a roll shape around respective winding cores 5, 6 which have similar external shapes to the external shapes of the respective constituent elements 3.4. 4 is formed (see Figure 2).

The corrugated plate material 1 is formed by corrugating, pressing, etc. a strip-shaped metal foil such as stainless steel foil, so that a large number of linear wave-like irregularities with a predetermined pitch and height are bent in parallel and continuously. Become. As the flat plate material 2, a band-shaped metal foil such as stainless steel foil is used as is. Winding core 5
．． 6 is a similar shape that matches the external shape of the outermost portion of each component 3.4 which is to be formed into a divided shape of an approximately elliptical shape. In addition, each corrugated plate material 1 and flat plate material 2 forming the components 3 and 4 are usually joined by brazing or the like in this component forming process, but
Instead of this, for example, a brazing material or the like may be interposed in this component forming step, and the soldering may be performed by heating in the next forming step. The joint may be brazed by heating. In addition, each corrugated plate material 1 and the flat plate material 2 may be joined entirely by brazing or the like, but on the other hand,
Parts may be joined by brazing or the like.

In the illustrated embodiment, the component 3.4 whose overall cross-sectional shape is approximately elliptical is divided into two parts. However, the present invention is not limited to such illustrated embodiments, and the present invention is not limited to such illustrated embodiments, and the component having a generally elliptical overall cross-sectional shape is divided into two or more plurality of components 3, 4 degrees, etc. For example, it may be divided into three or four parts. Of course, in this case, a predetermined number of similarly shaped winding cores 5.6, . . . are used.

In the illustrated embodiment, each winding core 5, 6 has one
Although a corrugated sheet material 1 and a flat sheet material 2 are shown rolled up one by one, the present invention is not limited to this.
Each component 3.4 may be formed by winding a plurality of corrugated sheet materials 1 and a plurality of flat sheet materials 2 around winding cores 5 and 6, respectively.

The component forming process is as follows.

Next, the molding process will be described.

FIG. 3 is a schematic front sectional view showing the molded heat-resistant structure 7, etc., for explaining the molding process. In the molding process, after such a component forming step, each component 3.4 is integrally joined to form a cylindrical, honeycomb-structured heat-resistant structure 7 whose overall cross-sectional shape is approximately elliptical. is formed. That is, the components 3 and 4 are brought into contact with each other, and the contact surfaces 8.
By fully or partially joining the parts 9 by brazing or the like, the constituent elements 3.4 are integrally joined, thereby forming a predetermined heat-resistant structure 7. In addition, 10 in the figure is an outer cylinder, and as described later, such an outer cylinder 10 is used in the illustrated embodiment.
A heat-resistant structure 7 is inserted inside.

The molding process is as follows.

Next, the heat-resistant structure 7 will be described.

By such a manufacturing method, that is, a component forming step,
Following the molding process, the heat-resistant structure 7 is manufactured.

In other words, this heat-resistant structure 7 is constructed by alternately wrapping a metal corrugated sheet material 1, which is formed into a belt shape by continuously bending corrugated irregularities, and a flat metal sheet material 2, which is a flat belt shape. It has a honeycomb structure in which the cross-sectional shape is approximately oval. This heat-resistant structure 7 has each divided component 3
. .

Now, this heat-resistant structure 7 is a planar assembly of a large number of hollow columnar cells in substantially triangular, semi-hexagonal, trapezoidal, and other harmful shapes, with the corrugated plate material 1 and the flat plate material 2 forming cell walls. It has a barrel, cylindrical honeycomb structure.

It is known for its properties such as high heat resistance and strength, can be used in high-temperature environments, excellent weight-to-weight ratio strength, light weight, high rigidity and strength, and excellent fluid rectification effect. Furthermore, this heat-resistant structure 7 has a large surface area per unit volume, that is, the surface areas of the corrugated plate material 1 and the flat plate material 2, which are cell walls, are large, so that it is suitable for use in, for example, a catalytic converter that purifies the exhaust gas of an automobile engine. used. A catalyst for reduction, for example, is attached to the surfaces of the corrugated plate material 1 and the flat plate material 2, which are the cell walls, as supporting bodies.

By the way, FIG. 4 shows such a heat-resistant structure 7 as an outer cylinder 10.
FIG. 3 is a schematic front cross-sectional view showing a state in which brazing is performed for insertion into the interior. FIG. 5 is a schematic front sectional view showing a product in which the heat-resistant structure 7 is inserted into the outer cylinder 10.

That is, in the illustrated embodiment, as shown in the third part above, the outer cylinder 10 divided into two parts is attached to the heat-resistant structure 7 from the outside, and then the heat-resistant structure 7 is attached inside as shown in FIG. With the outer cylinder 10 inserted, the two parts of the outer cylinder 10 are joined by brazing etc. to form a cylindrical body, and the fifth
The product will be commercialized as shown in the figure. Reference numeral 11 in FIG. 4 indicates a brazed joint between the outer cylinder 10 which is divided into two parts. Inserting the heat-resistant structure 7 into the outer cylinder 10, which is a case, in this manner has the advantage that its overall strength is further improved.

Further, in the illustrated embodiment, the outer cylinder 10 is made into a cylindrical body by joining two parts, but an integral cylindrical body is used from the beginning, and the heat-resistant structure 7 is attached to it. It may also be inserted and attached.

The heat-resistant structure 7 has this structure.

The heat-resistant structure 7 and its manufacturing method according to the present invention have been described above. Therefore, it becomes as follows.

First, this heat-resistant structure 7 consists of divided components 3 and 4.
In other words, the components 3 and 4 in which the corrugated sheet material 1 and the flat sheet material 2 are wound in a predetermined manner are integrally joined to form a honeycomb structure having an approximately elliptical overall cross-sectional shape.

In addition, in the manufacturing method, the heat-resistant structure 7 is manufactured by following the component forming process and the molding process. That is, a corrugated sheet material 1 and a flat sheet material 2 are wound in a predetermined manner around a core 5.
6 is wound around the center to form each component 3.4, and then a predetermined heat-resistant structure 7 is obtained by integrally joining each component 3.4.

So here's the first one. Second. It will be like the third one.

First, this heat-resistant structure 7 has each divided component 3
．． 4 are integrally joined, so there is no large space formed in the center.

In other words, unlike the prior art example of this kind described above, the winding is not wound from a constant center as a whole, so a large space is not formed in the center.

Secondly, this heat-resistant structure 7 follows the component forming process and the molding process, and each rolled component 3, 4
can be manufactured simply and easily by joining them together. In other words, unlike the prior art example of this kind described above, the heat resistant structure of the honeycomb structure with a circular cross-sectional shape as a whole does not require a complicated and troublesome special process such as winding it in a substantially S-curve shape. It can be manufactured simply and easily by appropriately applying a general manufacturing method that has been used in the past.

Thirdly, this heat-resistant structure 7 has each divided component 3
．． 4 are gathered together. Therefore, when used as a support base for a catalytic converter, for example, the heat-resistant structure 7 has particularly excellent overall strength because the thermal stress generated by heating is dispersed to each component 3.4. There is.

Note that this heat-resistant structure 7 and its manufacturing method relate to a so-called oval type structure in which the overall cross-sectional shape is approximately elliptical; It can also be applied to things called molds and other shapes. In other words, the technical concept of using each component 3.4 wound into a roll and joining each divided component 3.4 integrally can also be applied to heat-resistant structures of track field type and other shapes. It is applicable.

"Effects of the Invention" As explained above, the heat-resistant structure and the manufacturing method thereof according to the present invention utilize predetermined constituent elements wound in a roll shape and integrally join the divided constituent elements. This provides the following effects.

First, a large space is not formed in the center. Therefore, for example, when used as a carrier for a catalytic converter, the cleaning rate of exhaust gas does not decrease in the central part.

Secondly, it is easy to manufacture, and easy to commercialize and industrialize. In other words, conventional manufacturing methods for this type of heat-resistant structure having a circular cross-sectional shape can be applied as appropriate, and by following predetermined component forming steps and molding steps, the structure can be easily manufactured without requiring much time for molding.

Thirdly, it is also excellent in terms of strength. That is, since thermal stress is dispersed, the overall strength is particularly improved from this aspect.

In this way, the problems that existed in this type of conventional example are completely eliminated, and the effects of the present invention are remarkable and great.

[Brief explanation of drawings]

The drawings serve to explain embodiments of a heat-resistant structure and a method for manufacturing the same according to the present invention. FIG. 1 is a perspective view showing the base material, (1)
The figure shows a corrugated plate material, and the figure (2) shows a flat plate material. FIG. 2 is a schematic front sectional view showing each component for explaining the component forming process. FIG. 3 is a schematic front cross-sectional view showing the molded heat-resistant structure etc. for explaining the molding process. FIG. 4 is a schematic front sectional view showing a state in which brazing is performed to insert the heat-resistant structure into the outer cylinder. FIG. 5 is a schematic front sectional view showing a product in which a heat-resistant structure is inserted into an outer cylinder. 1... Corrugated plate material 2... Flat plate material 3... Component 4... Component 5... Winding core 6... Winding core 70.・Heat-resistant structure 8...Abutting surface 9...Abutting surface 0... Outer cylinder 1... Brazing is done at the joint part in Figure 1.

Claims (2)

[Claims] (1) A metal corrugated sheet material with continuous bending of corrugated irregularities to form a band shape and a flat metal sheet material forming a flat band shape are alternately wrapped around each other, and the overall cross-sectional shape is approximately oval. A heat-resistant structure having a honeycomb structure, the heat-resistant structure is formed by integrally joining each divided component, and each of the components has the above-mentioned corrugated plate material and flat plate material centered at a certain center. 1. A heat-resistant structure characterized by forming a roll-like structure that is wound alternately in a manner corresponding to each external shape. (2) A process in which each component is formed by dividing pieces whose overall cross-sectional shape is approximately elliptical when assembled together, and in which the corrugated unevenness is continuously bent to form a band-like metal. A method of winding corrugated steel sheets and metal flat sheets in the form of flat strips alternately around each winding core that has a similar shape to the external shape of each component to form a roll. a component forming step of forming each component, and then a molding step of integrally joining each component to form a heat-resistant structure with a honeycomb structure having a generally elliptical overall cross-sectional shape. A method for manufacturing a heat-resistant structure, comprising the steps of: