Method for molding micro-profiled composite joint strips

A forming method and a technology of contact strips, applied in metal processing equipment, metal rolling, metal rolling, etc., can solve the problems of large deviation of welding bars from neutral line, poor downstream welding, waste of precious metals, etc., and solve the problem of welding bars and The effect of offsetting the center line, reducing the adjustment time of the production process, and improving production efficiency

Active Publication Date: 2017-06-09
SHANGHAI TOUCH METALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is: the interface of the existing strip is arched during the processing process of the composite wire material, the thickness of the silver layer is effectively reduced, and the defective rate of the finished product is high; the precious metal wrapping of the composite wire material increases the composite ratio , there is more waste of precious metal; it is difficult to form the required cross-sectional shape; the product welding rod deviates from the neutral line greatly, resulting in poor downstream welding

Method used

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  • Method for molding micro-profiled composite joint strips
  • Method for molding micro-profiled composite joint strips
  • Method for molding micro-profiled composite joint strips

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The AgNi20 round wire is rolled into a square wire with a width of 3.0mm and a thickness of 1.55mm; the CuNi30Fe round wire is rolled into a trapezoidal wire with a width of 3.2mm and a thickness of 1.10mm, and is heated at 880°C, 4m / Hydrogen protection annealing was carried out under the condition of min to reduce the hardness of the matrix material; the two kinds of wires were subjected to ultrasonic cleaning and surface roughness treatment, and then hot-rolled and composited; the composite wires were processed to a square size of 3.0× after mold correction and heat treatment 1.8;

[0043] The AgNi20 / CuNi30Fe with a specification of 3.0×1.8 is preformed into a bimodal composite wire of 2.70×1.42 (such as Figure 8 shown), the specific size is: H 1 = 0.12mm, H 2 = 0.72mm, H 3 = 1.50mm; L 1 =0.60mm, L 2 =1.40mm, L 3 = 2.7mm; shoulder inclination angle β = 12°; finished precious metal thickness 0.70mm, total thickness H 3 =1.18mm, finished product width=3.0mm, fi...

Embodiment 2

[0046]The AgNi10 round wire was rolled into a square wire with a width of 1.20mm and a thickness of 0.76mm, and hydrogen protection annealing was carried out at 780°C and 4m / min; the CuNi30 round wire was rolled into a width of 1.20mm and a thickness of 0.25mm square wire, and under the conditions of 850 ℃, 4m / min hydrogen protection annealing; ultrasonic cleaning of the two kinds of wire, and then roll welding composite; composite wire through mold correction and heat treatment after processing to square Type size 0.96×0.36;

[0047] The AgNi10 / CuNi30 with a specification of 0.96×0.36 is preformed into a bimodal composite filament of 0.93×0.31 (such as Figure 10 shown), the specific size is: H 1 = 0.02mm, H 2 = 0.21mm, H 3 = 0.31 mm; L 1 =0.40mm, L 2 =0.62mm,L 3 = 0.93mm; shoulder inclination angle β = 0°; finished precious metal thickness 0.18mm, total thickness 0.26mm, finished product width = 1.0mm, product inclination angle 0°;

[0048] Continuous forming rolling ...

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Abstract

The invention discloses a method for molding micro-profiled composite joint strips. The method is characterized by comprising the following steps: performing wire drawing or roller drawing on square composite wires for pre-forming the needed double-peak appearance wires; and performing final forming on the pre-formed composite wires through a precision-rolling mill with a welding rib limited concave-convex molding roller, thereby obtaining the needed product with a special profile shape. The stress point of the composite strip in the rolling process is changed in a manner of pre-forming the double-peak appearance, so that the interface of the micro-profiled composite wire can be straightened, the precious metal cladding phenomenon is reduced, the utilization rate of precious metals is greatly improved, and the needed micro-profiled composite product is easily formed; and moreover, rolling forming is performed by utilizing the welding rib limited roller, the welding rib position does not need to be adjusted in the production process, the process wastes can be reduced, the production efficiency is improved, and the production cost of the whole product is reduced.

Description

technical field [0001] The invention relates to a forming method of a micro-special-shaped composite contact strip with a bimodal shape, and belongs to the technical field of bimetallic composite materials. Background technique [0002] The micro-shaped composite tape is a weak-current layered electrical contact material with a small cross-sectional area and a special shape. It is generally composed of two or three layers. Gold, silver and other precious metals and their alloys with properties such as anti-oxidation, anti-melting and bonding; the middle layer is generally made of gold and its alloys, silver and its alloys with good electrical and thermal conductivity, or diffusion resistance. , palladium and its alloys, Ni and other materials; the base layer is generally composed of copper, copper-nickel alloy, nickel and other alloys with good welding performance and electrical conductivity. [0003] Electrical contact materials are key materials for electrical contact com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16B21B27/02
CPCB21B1/166B21B27/024B21B2205/00B21B2261/00B21B2261/06
Inventor 刘玲陈俊曹晓宁王健吴训张健
Owner SHANGHAI TOUCH METALS TECH
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