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Mixed powder capable of rapidly removing punched burrs from sheet-type electrical contact and use method of mixed powder

A technology of mixing powder and electric contacts, which is applied in chemical instruments and methods, circuits, electric switches, etc. It can solve the problems of affecting the service life of contacts, unstable thickness and dimension, and poor dimensional consistency, so as to achieve easy pickling removal, The effect of low labor intensity and high friction

Active Publication Date: 2015-06-24
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method has low grinding force and fails to remove the burrs effectively and quickly, which will cause unstable thickness and dimensions, and easy product welding during welding, which will affect the service life of the contacts; and this method has low production efficiency and poor dimensional consistency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 9kg of stamped silver tin oxide flake electrical contact blanks into a 7.5L grinding tank, add 140g of ferric oxide, 55g of ferrous oxide, 4.5g of magnesium oxide, 9g of aluminum oxide, and 20g of zirconium oxide The mixed powder, add water to the position of 70%~80% of the volume of the grinding tank, put it into the centrifugal grinder, set the speed at 1300r / min, take it out after about 40min, rinse and separate the product.

[0029] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0030] Put the product into the ultrasonic cleaning equipment for ultrasonic cleaning.

[0031] The cleaned product is then dried, dried, and cooled to a finished product.

Embodiment 2

[0033] Put 8kg of stamped silver cadmium oxide flake electrical contact blanks into a 7.5L grinding tank, add 120g of ferric oxide, 50g of ferrous oxide, 3.5g of magnesium oxide, 8g of aluminum oxide, and 14g of zirconium oxide The mixed powder, add water to the position of 70%~80% of the volume of the grinding tank, put it into the centrifugal grinder, set the speed at 1400r / min, take it out after about 40min, rinse and separate the product.

[0034] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0035] Put the product into the ultrasonic cleaning equipment for ultrasonic cleaning.

[0036] The cleaned product is then dried, dried, and cooled to a finished product.

Embodiment 3

[0038] Put 10kg of stamped silver-zinc oxide flake electrical contact blanks into a 7.5L grinding tank, add 100g of ferric oxide, 40g of ferrous oxide, 3g of magnesium oxide, 6g of aluminum oxide, and 12g of zirconium oxide Mix the powder, add water to the position of 70%~80% of the volume of the grinding tank, put it into the centrifugal grinder, set the speed at 1500r / min, take it out after about 40min, rinse and separate the product.

[0039] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0040] Put the product into the ultrasonic cleaning equipment for ultrasonic cleaning.

[0041] The cleaned product is then dried, dried, and cooled to a finished product.

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PUM

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Abstract

The invention discloses mixed powder capable of rapidly removing punched burrs from a sheet-type electrical contact and a use method of the mixed powder. The mixed powder comprises the following components by mass: 70-150 parts of ferric oxide with the particle size of 100-400 microns, 35-60 parts of ferrous oxide with the particle size of 50-100 microns, 2-5 parts of magnesium oxide with the particle size of 50-250 microns, 5-10 parts of aluminium oxide with the particle size of 200-300 microns and 5-20 parts of zirconium oxide with the particle size of 20-150 microns. The mixed powder disclosed by the invention achieves the effects that the burr removal efficiency is high, hemming is avoided, residues are prevented, and the roughness of the surface of the contact is more uniform.

Description

technical field [0001] The invention belongs to the field of surface treatment, and specifically refers to a mixed powder for quickly removing punching burrs of sheet-shaped electric contacts and a use method thereof. Background technique [0002] At present, sheet electrical contacts are widely used in electrical fields such as contactors and miniature circuit breakers; as the core components of electrical appliances, the appearance and dimensional stability of sheet electrical contacts directly affect the assembly and performance of electrical appliances. [0003] The main materials involved in sheet electrical contacts are silver tin oxide, silver cadmium oxide, silver zinc oxide, and silver nickel. When the surface of these metal parts is punched into a rivet from a plate, it is very easy to have collapsed burrs and small microscopic metal shavings on the edges, which are commonly referred to as punched burrs; the existence of burrs can easily cause poor welding, even in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14B24B1/00H01H11/04
Inventor 李国伟柏小平黄文明吴斌刘隽义孙启波林万焕
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD