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Preparation method of high-strength composite brush assisted by nickel coating

A high-strength, nickel-plated technology, applied in the field of micro-connection, can solve the problems of reducing the strength and reliability of solder joints, destroying the brush structure, etc., and achieves wide adjustable range of welding parameters, simple process, and precise adjustment of welding process parameters. Effect

Active Publication Date: 2022-02-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive pressure or excessive welding current will damage the brush structure, especially the dissolution problem between interconnect materials, which also reduces the strength and reliability of solder joints

Method used

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  • Preparation method of high-strength composite brush assisted by nickel coating
  • Preparation method of high-strength composite brush assisted by nickel coating
  • Preparation method of high-strength composite brush assisted by nickel coating

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Experimental program
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Effect test

specific Embodiment approach 1

[0030] Specific implementation mode 1: This implementation mode records a method for preparing a high-strength composite brush assisted by nickel plating. The main body of the composite brush includes a beryllium bronze alloy brush piece, a gold-nickel alloy brush wire, and a beryllium bronze alloy brush piece The Ni layer of surface electroplating; Described method comprises the steps:

[0031] Step 1: Mechanically polish the beryllium bronze alloy brush piece and the gold-nickel alloy brush wire until the surface is smooth and smooth, without obvious protrusions or defects;

[0032] Step 2: Chemically clean the surface of the beryllium bronze alloy brush, rinse with running water for 10 seconds after cleaning, and dry with cold air at 30-40°C;

[0033] Step 3: Paste insulating tape on the non-welding side of the surface of the beryllium bronze alloy brush;

[0034] Step 4: pickling the welding side surface of the beryllium bronze alloy brush piece, the purpose is to remove ...

specific Embodiment approach 2

[0041] Specific embodiment two: the preparation method of a kind of high-strength composite electric brush assisted by nickel coating described in specific embodiment one, in step two, the specific components of the cleaning solution used in the chemical cleaning are: 50g / L sodium hydroxide, 50g A mixed solution composed of / L sodium carbonate and 50g / L sodium borate; the chemical cleaning time is 30-300s.

specific Embodiment approach 3

[0042] Specific embodiment three: the preparation method of the high-strength composite electric brush assisted by a kind of nickel coating described in specific embodiment one, in step four, the acid that adopts is the nitric acid solution of 5vol.%; The time of described pickling is 20 ~40s.

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Abstract

A method for preparing a high-strength composite brush assisted by nickel plating belongs to the technical field of micro-connection. The purpose of the present invention is to solve the problem of connection of dissimilar materials in the composite electric brush, mechanically grind the beryllium bronze alloy brush and the gold-nickel alloy brush wire; chemically clean the surface of the brush, rinse with running water after cleaning, and dry it with cold air. Paste insulating tape on the non-welding side, pickle the surface of the welding side, conduct nickel electroplating treatment on the surface of the welding side, then rinse with running water, dry with cold air, and remove the insulating tape pasted on the non-welding side; pickle the surface of the brush wire; The side to be welded is attached to the brush wire and placed between the upper and lower chucks of the resistance welding machine; pressure is applied on the upper electrode to make the two fixed and in close contact; pulse current is applied between the upper and lower electrodes to realize the brush and brush wire. welding between. The shear resistance of the brush after the nickel plating layer is assisted by welding is improved by an order of magnitude, and the preparation of a high-strength and high-reliability micro-brush can be realized.

Description

technical field [0001] The invention belongs to the technical field of micro-connection, and in particular relates to a preparation method of a high-strength composite electric brush assisted by nickel plating. Background technique [0002] Conductive slip ring, also known as collector ring, is a precision device that realizes the transmission and transmission of signals, power and current between two relative rotating mechanisms. It is widely used in aerospace, navigation, photoelectric measurement and other equipment. [0003] With the improvement of miniaturization in aerospace, weapon equipment, medical equipment, microwave devices and other fields, the microstructures in devices are constantly developing towards higher performance, smaller size, lower cost and higher reliability. In order to achieve miniaturization and high performance, the mechanical structure and materials in the device are constantly improving to increase the assembly density of electronic products, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R43/12
CPCH01R43/12
Inventor 田艳红王尚吴炳英杭春进郑振
Owner HARBIN INST OF TECH