JPS58112678A - Clad metallic pipe - Google Patents

Abstract

PURPOSE:To decrease the thickness of a clad metallic pipe by welding a metal- laminated plate which is bonded by providing a prescribed adhesive layer in a pipe shape. CONSTITUTION:The clad metallic plate obtained by bonding a metallic plate to another metallic plate of the same kind with or different kind from said metallic plate with an adhesive is formed in a pipe shape and both facing edges are welded together to obtain the titled metallic pipe. Said adhesive contains 10-100g/m<2> metallic powder of iron, aluminum, copper, etc., or a conductive material of fiber having length or a diameter 0.5-1.5 times as great as the thickness of the adhesive layer and is formed to a 15-60mum thikness. This clad metallic pipe has less thickness and has supeiror workability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is made by bonding metal plates of different or similar types with an adhesive containing a substance such as a metal or carbon having conductivity,
KIE tubular clad metal plate without spot welding
It is a solid clad metal tube whose opposing edges S are welded to each other.

Recently, for example, ordinary steel plates are used as a base material, and thin metal plates such as stainless steel are layered on top of this as a composite material.

A clad metal plate is manufactured by bonding the two plates together by interposing a KIl resin adhesive between the two plates. C clad metal plates are extremely inexpensive, and long-term KI maintains corrosion resistance and beautiful surface gloss, so they are suitable for use in buildings, bridges, roads, etc.
Widely used for exterior ◆ applications in gates. However, such conventional adhesive clad metal plates are
Since there is an adhesive as the edge, it is not possible to join by resistance welding, and therefore the joining method, such as bolt fastening 41, which is commonly used for joining parts, is not suitable for assembly. I had no choice but to use tIl. Therefore, since the construction is time consuming and expensive, it has been desired to develop an adhesive clad metal plate that can be resistance welded. In addition, conventional adhesive clad metal plates did not have sufficient adhesive strength between metals, resulting in problems such as the adhesive layer peeling off when subjected to forming processes such as cutting and wringing. .

For this reason, conventional methods to solve these problems include incorporating conductive substances such as metals, carbon powder, or fibers into adhesives, which have already made welding possible. being developed. However, if the inner thickness of the metal plate in this case is made thinner, there is a problem that blisters occur near the welded area and the surface characteristics are impaired, and the reality is that only extremely thick metal plates can be obtained. By the way, when it comes to a rad metal plate like this 1-
J, 11ml, stainless steel, copper, aluminum.

Since expensive materials such as titanium are used, the industry is trying to reduce the inner thickness as much as possible to reduce the economic burden.
It has been gw. This is a craftsman! Despite IIK, conventional clad metal plates can only be made with extremely thick walls, and even if pipes are formed using these unconventional metal plates, they are expensive and lack versatility. If the wall thickness was too thick, the bottom shape would be poor during pipe manufacturing, which would also reduce work efficiency.

On the other hand, in the production of conventional clad metal pipes, there is a stile.

In addition to the above, there is also a method of manufacturing double billets and using hot extrusion method to produce clad metal pipes, and a method of manufacturing double billets with holes,
There are also methods of manufacturing by hot rolling, light cold drawing, and sensual welding41, but these are all seamless pipe manufacturing methods and have relatively thick walls. However, it has the same drawbacks as the previous case, and it is 6 t.

In view of the above-mentioned drawbacks of the conventional art, the present invention has been made to improve and eliminate the drawbacks, and to provide an adhesive layer containing a conductive substance between a metal plate and a metal plate of the same type or a different type. 15-6
To provide an extremely thin inner clad metal tube, which is provided with a thickness of 0μ, and by bonding both metal plates with the adhesive, forming the clad metal plate into a tubular &fE shape, and welding the opposite end edges to each other. It is something to do.

The configuration of the present invention will be explained below based on the embodiments shown in the drawings.

It is an example figure showing the whole pipe manufacturing process concerning the 1st lamp production #4. In the figure, 1 is a heating furnace, 2 is a pressure roll,
3ri roll fore building stunt.

4 is a welding machine, 5 is a pipe cutting machine, and 6 is a piler.

For example, a metal plate with a thickness of 0.05 to 1.0-1, which is to be used as a composite material, Jj, for example, a metal plate with a thickness of 0.4- or more, which is to be used as a base material, cr: a film to be described later. It is a Kg-shaped adhesive. These metal sheets.

B and adhesive Crt In this case, a coiled one is prepared.

Lights, stainless steel, copper,
Examples include copper alloy, nickel, aluminum, aluminum alloy, and titanium. These metals are very expensive, and for economic reasons they also need to be as thin as possible.

The thickness of the metal plate is preferably 0.05 to 1.0 m, more preferably rjo, os to 0.5 m. As the metal plate B to be the base material, it is normal. Carbon steels such as steel and high-strength steel are mainly used. Zinc, tin, carbon steel plate
It may be surface treated with copper plating or the like.

The adhesive C may be a thermoplastic resin adhesive or a thermosetting resin adhesive. The usage form m is hot F in the case of Figure 1.
It is a melt type, but there are also solvent types.

The thickness of the adhesive C, which may be a pressure-sensitive type, an adhesive type, or a one-reaction type, is 15 to 60 degrees. This is because if the tj is less than 15 μm, the adhesive strength will decrease and the practical value will be poor, and if it is more than 60 tones, blistering will occur during welding.

Further, the adhesive Kn is mixed with conductive substances such as metals such as iron, zinc, aluminum, copper, and stainless steel, or carbon powder or fibers. The size of this conductive substance depends on the thickness of the layer of adhesive C, but it must be at least 0.5 times and no more than 1.5 times the thickness of the adhesive layer used. .

This is halo. This is because if the size is less than 5 times, the size is too small and welding is impossible, and if it is 1.5 times or more, the adhesive strength l is significantly reduced and the intended purpose cannot be achieved.

Although it is desirable that the conductive substance has a spherical shape, it is also possible to form it in the shape of an ellipsoid, a prismatic sphere, a columnar shape (fiber shape), etc.
In this case, if the maximum diameter or length of the Kri is within the above range, it is possible to use a smaller one and a larger one. Amount of conductive material used rx
@It differs from the thickness of the adhesive layer or the size K of the conductive substance, but 12! The usable range is lO to 100 y/.

This range! ! The reason for setting IK is that if it is less than 102/-, welding becomes difficult and the adhesion effect becomes poor, while if it is more than 102/♂, the amount is too large and the adhesion effect is deteriorated. It is.

Next, the metal plate B and adhesive C set in the above process.
Using this method, we will explain the 9th aspect of manufacturing clad metal tubes.

As shown in Fig. 1, a metal plate B, adhesives Orj, and adhesive C prepared in a coil shape are arranged between metal plates A and B, and first heated in a heating furnace lK'4. Then, the two gold maple sheets B are bonded together using a pressure roll 2, and the clad metal sheet shown in Fig. gg2 is obtained. Then, the roll forming stand 3f on the clad metal plate DI-j Oka line is formed into a tubular shape as shown in the 3rd SK, and the opposite end edges .
Welding is performed. Welding is electrical resistance welding! It's a li1 rumor. In this case, the adhesive OKn conductive material is contained in the above-mentioned 1 ratio, so that the opposing edges e, . of the tubular clad metal plate can be well welded. When welding is completed, the clad metal tube shown in Fig.
are obtained, cut into a predetermined length by the metal tube E-lamp cutting machine 5, and arranged and stored in the piler 6.

From this, it is possible to obtain an inexpensive rad metal tube with an extremely thin inner thickness, excellent corrosion resistance, etc., and where the metal is located on the outside surface. Moreover, this metal tube mH metal plate.

Since B and adhesive C are set as described above, there is no blistering during welding and the adhesive strength is sufficient.

Furthermore, since the wall thickness of the entire H is thin, formability during processing is improved, and work efficiency can be improved.

In the above example, a case where a clad metal tube with excellent corrosion resistance etc. is located on the outer surface side is obtained, but a metal tube with excellent corrosion resistance etc. is located on the inner surface side.Kl-'! , the metal plate shown in the first FgK and B may be reversely arranged.

Figure 5 shows 7 tons of uneven patterns on one side of the metal sheet that will become the composite material.
- provided, l! shown in FIG. This is an embodiment in which a clad metal pipe 1 (see FIG. 6) with a metal plate located on the inner side is manufactured by welding. in this case.

A layer of adhesive C and a slight gap are formed between the concave portions of the concave-convex pattern 7 and the metal plate B which is to be the base material, resulting in an excellent damping effect. Furthermore, when crimping with the crimping roll 2, the concave-convex pattern 7 of the gold maple plate breaks through the adhesive Cq) layer and comes into contact with the metal plate BK liquid. Comparatively certain. Therefore, when this clad metal region tube 11 is used for an automobile exhaust pipe, etc., in addition to the corrosion resistance, heat resistance, and high rigidity of the metal plate itself made of a composite material such as stainless steel, it also has the above-mentioned distribution effect. It has the effect of increasing rigidity and is of high quality. It should be noted that a configuration in which both sides of the metal plate are provided on the mating uneven pattern 7 may also be used.

FIG. 7 shows a manufacturing mode when the adhesive C is a solvent type. The adhesive C can be supplied by curtain flow from the adhesive 41NB onto the metal structure plate shown in the figure. Other points, as well as the structure and effects of the clad metal pipe produced therefrom, are as described above or by providing an adhesive layer containing a conductive substance between the metal plates of a different type and having a thickness of 15 to 60 μm. Glue both metal plates with adhesive and make a clad metal plate into a tubular shape 51! In this type of clad metal tube that uses an expensive metal plate as a composite material, the inner thickness of the expensive metal plate is It can be made extremely thinner than conventional ones, and is advantageous in terms of cost. Also, since the thickness of the entire clad metal plate is reduced, the bottom shape is excellent when formed into a tubular KIit shape, and one-work efficiency can be improved. Furthermore, Kn clad metal plates can be welded, and after spot welding several places on the clad metal plate in advance, it is also possible to shape the clad metal plate into a tubular shape and weld its opposing edges, which results in excellent welding of both metal plates. Adhesive strength can be obtained.

[Brief explanation of the drawing]

1st drawing showing the entire pipe manufacturing process according to the present invention, 2nd drawing
The figure is a cross-sectional view showing the clad metal plate formed in the middle of the process, Figure 3 is a cross-sectional view showing the clad metal plate in a tubular LJE shape, the 4th IITtlk+ diagram of the lamp clad tube, and Figure 5 is the clad metal plate. FIG. 6 is a cross-sectional view of a clad metal tube manufactured from the clad metal plate shown in FIG. 5, and FIG. 7 is a drawing showing another example of the adhesive supply means. be. A, B...Metal plate C...Adhesive D...Clad metal plate θ, e...Both edges am...Clad metal tube patent applicant Sumitomo Metal Industries Co., Ltd. Agent Patent attorney Yen Toshihiko Ta 1E Figure 4 386- Figure 5 Figure 6

Claims (1)

[Claims] l An adhesive layer is provided between a metal plate and a metal plate of the same type or a different type, and the thickness of the adhesive layer is 15 to 60μ, and the % adhesive is the length or the maximum @ is the adhesive layer thickness. 0.5～
The clad metal plate to which the two metal plates are bonded is formed into a tubular shape, and the opposite end edges A clad metal pipe made of a high-temperature metal pipe.