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Mixed powder for rapidly removing forged burrs of rivet electrical contact and application method thereof

A technology of mixing powder and electrical contacts, applied in chemical instruments and methods, contacts, circuits, etc., can solve problems such as poor product consistency, low production efficiency, and unstable dimensions, and achieve low production efficiency and low contact resistance of contacts. Low, easy pickling removal effect

Active Publication Date: 2015-05-27
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low grinding force of this treatment method fails to effectively and quickly remove the burrs, and it is prone to curling, which will cause dimensional instability, automatic riveting jams, and even contact with burrs when the contacts are in service, resulting in early welding; and this kind of The production efficiency of the method is low and the product consistency is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Put 7kg of silver tin oxide integral rivet electrical contact blanks formed by heading into a 7.5L grinding tank, add 110g of ferric oxide, 55g of ferrous oxide, 4.5g of magnesium oxide, 4.5g of yttrium oxide, and zirconia 9g of mixed powder, add wetting agent, 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 1200r / min, take it out after about 30min, rinse and separate the product.

[0032] Dry the deburred product and put it into a vacuum furnace for annealing, set the temperature at 400°C, keep it warm for about 50 minutes, and then take it out with the furnace to room temperature.

[0033] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0034] The product is smoothed with a rolling and polishing machine, and then the product is rinsed clean.

[0035] Put the product into the ultrasonic cleaning equi...

Embodiment 2

[0038] Put 6.5kg of silver tin oxide copper-clad rivet electrical contact blanks formed by heading into a 7.5L grinding tank, add 65g of ferric oxide, 35g of ferrous oxide, 2g of magnesium oxide, 2g of yttrium oxide, and zirconia 6g of mixed powder, add wetting agent, 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 30min, rinse and separate the product.

[0039] Dry the deburred product and put it into a vacuum furnace for annealing, set the temperature at 320°C, keep it warm for about 60 minutes, and then take it out with the furnace to room temperature.

[0040] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0041] The product is smoothed with a rolling and polishing machine, and then the product is rinsed clean.

[0042] Put the product into the ultrasonic cleaning equi...

Embodiment 3

[0045] Put 6.3kg of silver cadmium oxide integral rivet electrical contact blanks formed by heading into a 7.5L grinding tank, add 100g of ferric oxide, 50g of ferrous oxide, 4.5g of magnesium oxide, 4.5g of yttrium oxide, and Mix 14g zirconium powder, add wetting agent, 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 30min, rinse and separate the product.

[0046] Dry the deburred product and put it into a vacuum furnace for annealing, set the temperature at 350°C, keep it warm for about 80 minutes, and then take it out with the furnace to room temperature.

[0047] Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean.

[0048] The product is smoothed with a rolling and polishing machine, and then the product is rinsed clean.

[0049] Put the product into the ultrasonic cleaning e...

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PUM

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Abstract

The invention discloses mixed powder for rapidly removing forged burrs of a rivet electrical contact and an application method thereof. The mixed powder comprises following components: iron sesquioxide, ferrous oxide, magnesium oxide, yttrium oxide and zirconium oxide, wherein the grain size of iron sesquioxide is 50-300 microns and the mass part is 50-120 parts; the grain size of ferrous oxide is 20-100 microns and the mass part is 30-60 parts; the grain size of magnesium oxide is 50-200 microns and the mass part is 1-5 parts; the grain size of yttrium oxide is 5-100 microns and the mass part is 1-5 parts; the grain size of zirconium oxide is 5-150 microns and the mass part is 4-15 parts. In the application process, the mixed powder has the advantages that the speed of removing the burrs is high; no crimped edges and no residues are formed; the surface roughness of the contact is uniform.

Description

technical field [0001] The invention belongs to the field of surface treatment, and specifically refers to a mixed powder for quickly removing burrs made by rivet electric contacts and a use method thereof. Background technique [0002] At present, rivet-type electrical contacts are widely used in electrical fields such as switches, relays, thermostats, contactors, and miniature circuit breakers. They have the characteristics of low manufacturing cost and strong applicability; as the core components of electrical appliances, the appearance of rivet electrical contacts And dimensional stability directly affects the assembly and performance of electrical appliances. [0003] The main materials involved in rivet-type electrical contacts are silver tin oxide, silver cadmium oxide, silver nickel, pure silver, and pure copper. When the surface of these metal parts is processed into rivets by wire upsetting, it is very easy to have flashes and small microscopic metal shavings on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14B24B31/02H01H11/04
CPCH01H1/0237H01H11/048H01H2001/02378
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