JPS6030519A - Composite extruded shape for joining - Google Patents

Abstract

PURPOSE:To obtain a shape improved in electrolytic corrosion resistance and adhesion strength in a composite shape for binding made up of Al and metal of different kinds for joining by extending a part of joining material and inserting it in a body to an extruded shape made of Al. CONSTITUTION:This composite extruded shape for joining is obtained by supplying a joining material, for instance, a copper wire 3 parallel to the direction of extrusion, and after extruding Al for the body of extruded shape to surround tightly around the wire 3, cutting the end part of the extruded shape 1. In this example, the sectional form of the body 1 is deformed circular having grooves 2, 2 on both sides, and the wire 3 is buried and inserted in a body to any position of inside, and at the same time, the wire 3 is extended from the end of the body 1 to use for joining.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite extruded shape for joining made of aluminum and dissimilar metals for joining, such as copper or copper alloy, which prevents electrolytic corrosion and improves bonding strength. The purpose is to make the work easier.

It is generally known that it is difficult to join copper to aluminum by welding or brazing. Therefore,
Conventionally, for example, as shown in FIG.
Fix the copper frame with fasteners C such as bolts and nuts,
As shown in Fig. 2, aluminum a and copper plate are butted together and directly joined by special brazing d, or as shown in Fig. 3, aluminum a' and copper b''
Using a bonding material e which has been bonded together in advance, aluminum a' and aluminum a of this bonding material e are also bonded.

A method has been used in which the copper b' of the bonding material e and the copper plate are welded f, soldered, or brazed g to indirectly join them. However, this type of conventional joining has the following drawbacks.

(1) When using fasteners C such as bolts and nuts 1) Drilling is required, and installation takes time and effort.

2) Poor electrical contact is likely to occur due to insufficient bonding surface.

3) Not suitable for joining small items.

(2) In the case of direct bonding (Figure 2) 1) Since the bonded surfaces are only partial, loosening occurs at locations where vibration occurs.

2) Thermal strain occurs in high temperature areas, causing loosening.

3) Not suitable for joining large objects.

(3) In the case of indirect bonding (Fig. 3) 1) A special brazing agent is required, and the bonding work is time-consuming and labor-intensive.

2) One alloy layer is generated due to high temperature bonding, and
Electrical corrosion is likely to occur.

(4) In the case of joining using roll crimping material (cladding material) or explosive bonding material ■) A special device is required to join aluminum and copper, and large-scale equipment is required.

2) Since copper is exposed over the entire edge, electrolytic corrosion is likely to occur.

3) It is impossible to join shapes other than plate shapes, such as T, round, and rectangular shapes.

4) As mentioned in 3) above, because it is plate-shaped, it cannot be used as is.
It must be cut or processed into the desired size and shape.

This invention was made with the intention of solving the above problem, and its gist is that a joining material such as steel material is integrally embedded and inserted into the main body of an extruded aluminum shape, and It is characterized by a part that extends from the extruded shape body and can be used for joining, and can be used for joining the joining material, the same type of metal as the joining material, and, if necessary, an aluminum extruded shape. The object of the present invention is to provide a composite extruded shape material for joining, which is characterized in that the main body and the aluminum material can be easily and reliably joined to each other, and furthermore, it is possible to prevent electrolytic corrosion or poor electrical contact. be.

Embodiments of the present invention will be described in detail below with reference to FIGS. 4 to 6.

FIG. 4 is a perspective view showing the first embodiment of the composite extruded shape for joining of the present invention, in which l is the main body of the extruded aluminum shape, which has a modified cross section with grooves 2, 2 on both sides. It is formed into a circular shape, and a copper wire 3 serving as a bonding material is integrally buried and inserted in any part inside the circular shape.
extends from the end of the extruded section main body 1 and is used for joining.

The composite extruded section of the present invention constructed as described above is bonded with a bonding material, that is, copper 1iA, through a mandrel (not shown).
3 in a direction parallel to the extrusion direction, at the same time extruding aluminum, which is the metal for the extruded shape body, so as to closely surround the copper wire 3, and then cutting the end of the extruded shape 1. It is formed by

In the above embodiment, the case where there is one copper wire 3 has been explained, but the number and buried position of the copper wires 3 are arbitrary, and the copper wires 3 can be buried as necessary. The material is not limited to the copper wire 3; for example, as in the second embodiment shown in FIG. The copper plate 4 may be partially extended from the extruded section 1a. Furthermore, as in the third embodiment shown in FIG. 6, the bonding material may be formed of a metal other than copper, such as a wire or plate material such as stainless steel, iron, or nickel-chromium. FIG. 6 shows an example of this, in which a copper wire 3 and a stainless steel plate 5, which are bonding materials, are placed in a horizontal piece ld of an extruded aluminum body 1c having a substantially L-shaped cross section. This is a case where the extruded shape member is inserted into the body and a part thereof extends from the extruded shape body 1c.

In the composite extruded shape of the present invention shown in FIG. 6, the diameter of the copper wire 3 is three strokes, and the copper wire 3 has a diameter of 1
The joining copper wire 6 is soldered 8, and the joining stainless steel plate 5 has a thickness of 0.3 mm and a width of 10 mm.
When a tensile load is applied to 7 joined by spot welding 9, the adhesive strength of the copper wire bonding material is 28 kg/nuf.
f (5.5 g at a breaking load of 0.5 mφ), and the joining copper wire 6 broke. Also, in the case of stainless spora 1 welding, the joining stainless steel plate 7 broke.

As explained above, the composite extruded shape of the present invention has a bonding material made of a metal different from aluminum embedded in the main body of the aluminum extruded shape, and this bonding material is also inserted into the extruded shape. Since it is formed so that it can be extended from the main body of the material and used for joining, the adhesive force between the main body of the extruded aluminum shape and the bonding material made of dissimilar metals is extremely high. Since the bonding material is buried and inserted at the same time as extrusion molding, even shapes with complex cross-sectional shapes can be easily manufactured, reducing costs and providing quality that prevents electrolytic corrosion. average of
It is possible to increase the energy consumption and lifespan. In addition, the same type of metal as the bonding material can be easily and reliably bonded to the extension part of the bonding material, and if necessary, the same type of aluminum can be bonded to the extruded shape body. It can be used for various purposes such as various electrical terminals, and its utility value is remarkable.

[Brief explanation of the drawing]

1 to 3 are perspective views showing the bonding mode of conventional bonding materials, FIG. 4 is a perspective view showing a first embodiment of the composite extruded section of the present invention, and FIG. 5 is a perspective view of the composite extrusion of the present invention. FIG. 6 is a perspective view showing a second embodiment of the extruded section, and FIG. 6 is a perspective view showing a third embodiment of the composite extruded section of the present invention. In the figure, 1, la, lc aluminum extruded shape body 3 copper wire (bonding material) 4 copper plate (bonding material) 5 stainless steel plate (bonding material). Patent applicant Nippon Light Metal Co., Ltd. Figure 4

Claims (1)

[Claims] A bonding material made of a metal different from aluminum is integrally embedded in the aluminum extruded shape body, and a part of this bonding material can be extended from the extruded shape body and used for bonding. A composite extruded shape for joining, which is characterized by: