JPH04106819A - Manufacture of throughlay material - Google Patents

Abstract

PURPOSE:To manufacture a throughlay material whose contact point material side surface joining strength is sufficient, by joining a belt like contact point material to a belt like base material groove, and then, manufacturing an inlay material by means of hot rolling, and afterward, obtaining the through lay material by machining off the base material. CONSTITUTION:A groove 2' whose section is of a reversed trapezoid, is provided by machining in the longitudinal direction of a base material 1, and a belt-like contact point material 3' which has belt-like rectangular cross section is joined to the groove 2' by seam welding, and next, an inlay material 4' is manufactured by hot rolling, and the base material 1 of an inlay material 4' side which has no contact point material 3' is machined off. A seam electric current flows at a portion where the material 3' and the material 1 come into contact with each along the groove 2', and this portion is heated and melted, and comes to possess a strong joining strength. As a result, no cracking occurs at the time of material processing due to the high joining strength of the side surface of the material 3'.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a method for manufacturing a throughlay material used as a material for electrical contact parts.

(Prior art) Conventionally, in order to manufacture a through-lay material, a groove 2 having an inverted trapezoid cross section is cut in the longitudinal direction of a strip-shaped base material l as shown in FIG. As shown in FIG. 2, a band-shaped contact material 3 with a rectangular cross section is hot-rolled to form an inlay material 4 as shown in FIG. The base material I was scraped off to produce a throughlay material 5 as shown in FIG. 2d.

(Problem to be Solved by the Invention) By the way, in the above-described method for manufacturing a through-lay material, in order to press the contact material 3 into the groove 2 of the base material l by hot rolling,
It is necessary to cut the side surface of the groove 2 at an inclination angle of 60 degrees or less.

Therefore, the contact material 3 in the completed throughlay material 5
Since the width of the top surface and the width of the bottom surface are significantly different, the applications are limited.

In addition, in order to press the contact material 3 into the groove 2 of the base material l as described above, since the bonding strength of the side surface of the contact material 3 is weaker than the bonding strength of the bottom surface, when scraping the base material 1 on the back surface, the contact The joints on the sides of material 3 sometimes cracked. Moreover, when the material obtained by cutting the completed throughlay material 5 was press-molded, the joints on the side surfaces of the contact material 3 often peeled off and could not withstand press-forming.

SUMMARY OF THE INVENTION Therefore, the present invention provides a method for manufacturing a through-lay material that has sufficient bonding strength on the side surfaces of the contact material.

(Means for Solving the Problems) In order to solve the above problems, the method for manufacturing a through-lay material of the present invention involves cutting a groove having an inverted trapezoidal cross section in the longitudinal direction of a strip-shaped base material, and then A band-shaped contact material with a rectangular cross section is joined by seam welding, then hot rolled to create an inlay material, and then the base material on the side of the inlay material that does not have the contact material is scraped off to create a through-lay material. It is characterized by making.

(Function) As described above (in the method for manufacturing a through-lay material of the present invention, a contact material having a rectangular cross section is seam welded to a groove having an inverted trapezoidal cross section in a strip-shaped base material, so that the contact material and the base material are bonded to each other on the sides of the groove. A seam current flows through the contacting part, heating and melting this part, resulting in strong joint strength.Therefore, after making the inlay material by hot rolling, the contact material of this inlay material can be used. When the base material on the non-contact side is scraped off, the joints on the side of the contact material will not crack.Also, even if the material obtained by cutting the through-lay material is press-formed, the joint on the side of the contact material will not break. It can sufficiently withstand press molding without peeling.

(Example) An example of the method for manufacturing a through-lay material of the present invention will be described with reference to the drawings.
．． 2n+m Cu80%N i 15%S n 3.5
．． 9/, a strip-shaped base material l made of ~101.5%, in the longitudinal direction, an inclination angle of 80 degrees, a depth of 0.8 mm, a bottom width of 1.2
A groove 2' with an inverted trapezoidal cross section of
Then, in this groove 2', as shown in Fig. 1 (
Ag-Pd40%-C with width 1.3mm and thickness 0.8mm
A band-shaped contact material 3' with a rectangular cross section made of 20% U is joined by seam welding, and then annealed in a tubular furnace at 800°C at 1m/min to a thickness of 1 as shown in Fig. 1C.
mm to make an inlay material 4', and then as shown in Figure 1 d, the back surface was shaved off to a thickness of 0.35 mm to make a through-lay material 5', which was then rolled to a thickness of 1.5 mm at 800°C in the same manner as above.
/min to a thickness of 0.1 mm after annealing through a tubular furnace.
The material was rolled to a thickness of 16 mm, then annealed by passing it through a tube furnace at 800°C at 3 m/min, then rolled to a thickness of 0.08 m, then cut on both left and right sides to a width of 16 mm, and then annealed at 450°C at 3 m/min. It was annealed by passing it through a tubular furnace.

As mentioned above, in the manufacturing method of the through-lay material of the embodiment, the contact material 3' is seam welded to the side surface of the groove 2' of the base material 1, so the bonding strength of the contact material 3' is extremely high, and the back side is When the side base material 1 was scraped off, the joint on the side surface of the contact material 3' did not crack. In addition, the material obtained by cutting the completed throughlay material is press-formed into 9
Even when bent by 0 degrees, the joints on the side surfaces of the contact material 3' did not peel off, and the material did not break.

Furthermore, the contact material 3' is attached to the groove 2 of the base material 1 by seam welding.
In order to bond to the side surface of contact material 3', the side surface of groove 2' can be inclined at an angle of up to 80 degrees. , its uses expand.

(Effects of the Invention) As can be seen from the above explanation, according to the method for manufacturing a through-lay material of the present invention, the bonding strength of the side surface of the contact material is high, so that it does not break during processing of the material, and the top surface width dimension of the contact material This has the effect of making it possible to reduce the difference in the width of the lower surface, expanding the range of applications, and easily manufacturing a through-lay material that can contribute to improving performance and efficiency as a material for electrical contact parts.

[Brief explanation of the drawing]

1A to 1D are diagrams showing the steps of the method for manufacturing a through-ray material of the present invention, and FIGS. 2A to 2D are diagrams showing the steps of the conventional method for manufacturing a through-ray material. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. Figure 5'... Through-lay material diagram (d)

Claims (1)

[Claims] 1) A groove with an inverted trapezoid cross section is cut in the longitudinal direction of the strip-shaped base material, and then a strip-shaped contact material with a rectangular cross section is joined to this groove by seam welding, and then hot rolled to form an inlay material. A method for manufacturing a through-lay material, which comprises making a through-lay material, and then scraping off the base material on the side of the inlay material that does not have the contact material to make a through-lay material.