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Abrasive for rapidly removing tampered burr and ring wear of riveted electrical contact, its preparation method and application

A technology of electrical contacts and abrasives, applied in chemical instruments and methods, machine tools suitable for grinding the edge of workpieces, grinding/polishing equipment, etc., can solve the problem of increased rivet processing costs, easy ring marks on the rivet working surface, and inability to Removal and other issues

Active Publication Date: 2017-01-04
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 manufacturing process of rivet-type electrical contacts is formed by upsetting wire rods. During this process, two major processing defects are prone to occur: (1) Burrs are prone to appear on the edge of the rivet; (2) Ring marks are prone to appear on the working surface of the rivet.
For the first method, there are Si and Al elements in the abrasive. Although ring marks can be removed, these elements are easily adsorbed on the rivet working surface, and cannot be removed by pickling treatment, which will affect the quality of the rivet.
For the second method, the appearance of ring marks appears after the mold has been working for a period of time. Although this method can process or replace the mold in time to avoid the appearance of ring marks, it directly causes the increase of rivet processing costs, greatly greatly shorten the service life of the mold

Method used

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  • Abrasive for rapidly removing tampered burr and ring wear of riveted electrical contact, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Contain mixed powder ferric oxide, ferrous oxide, magnesia, yttrium oxide, 10kg of mixed powder of zirconia, epoxy resin 15kg is placed in the blender, the epoxy resin described in the present embodiment is national designation E51 or E44, After stirring for 30 minutes, take out the colloid, put the colloid into the mold, put the mold in a refrigerator, control the temperature at 8°C, and refrigerate for 20 minutes. After taking out the mold, turn it over, pour out all 10,000 abrasives, and the side length is 15mm, the abrasive is put into the sizing agent, the sizing agent described in the present embodiment is sulfonic acid, a kind of organic acid, general formula R-SO3H, R represents hydrocarbon group, strong acidity, relatively large water solubility is arranged, is used for making dyestuff, Drugs, detergents, acidic, add water to 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 10min...

Embodiment 2

[0041] Put 5.9kg of ferric oxide, 2.9kg of ferrous oxide, 0.3kg of magnesia, 0.3kg of yttrium oxide, and 0.6kg of zirconia mixed powder into a total of 10kg, and place 15kg of epoxy resin with grade E44 in a mixer and stir for 10 minutes Finally, take out the colloid, put the colloid in the mold, put the mold in a refrigerator, control the temperature at 8°C, and refrigerate for 20 minutes. After taking out the mold, turn it over, pour out all 10,000 abrasives, and the side length is 12mm. Put the abrasive into the sizing 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 10min, rinse and separate the product. Dry the product containing burrs and ring marks and put it into a vacuum furnace for annealing, set the temperature at 400°C, keep it for about 50 minutes, and then follow the furnace to room temperature and take it out. Use dilute sulfuric acid to pickle...

Embodiment 3

[0043]Put 6.1kg of ferric oxide, 3.1kg of ferrous oxide, 0.2kg of magnesia, 0.2kg of yttrium oxide, and 0.4kg of zirconia mixed powder into a total of 10kg, and place 15kg of E51 epoxy resin in a mixer and stir for 15 minutes Finally, take out the colloid, put the colloid in the mold, put the mold in a refrigerator, control the temperature at 5°C, and refrigerate for 15 minutes. After taking out the mold, turn it over, pour out all 10,000 abrasives, and the side length is 15mm. Put the abrasive into the sizing 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 12min, rinse and separate the product. Dry the products containing burrs and ring marks and put them into a vacuum furnace for annealing. The temperature is set at 350 ° C, and the temperature is kept for about 60 minutes. After that, it is taken out with the furnace to room temperature. Use dilute sulfur...

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Abstract

The invention discloses an abrasive for rapidly removing tampered burr and ring wear of a riveted electrical contact, its preparation method and an application. The preparation method comprises the following steps of placing the mixed powder and epoxy resin in a blender after being mixed at a ratio; after blending for a period of time, taking out a colloid; placing the colloid in a mould and refrigerating; taking out the abrasive after a period of time. The abrasive can rapidly remove tampered burr and ring wear of the riveted electrical contact. The abrasive can remove tampered burr and ring wear of the riveted electrical contact; meanwhile, the abrasive shortens the grinding time, saves the testing cost and provides technical support for the development of low-voltage appliance industry.

Description

technical field [0001] The invention belongs to the field of surface treatment of materials, and specifically refers to an abrasive for quickly removing upsetting burrs and ring marks of rivet electric contacts, a preparation method and application thereof. Background technique [0002] The electrical contact material is an important factor affecting the reliability of the switch electrical contact system. The manufacturing process of rivet-type electrical contacts is formed by upsetting wire rods. During this process, two major processing defects are prone to occur: (1) Burrs are prone to appear on the edge of the rivet; (2) Ring marks are prone to appear on the working surface of the rivet. [0003] For the processing defects of rivet-type electrical contacts, the method of grinding is mainly used to remove them. The applicant has previously developed a mixed powder for quickly removing burrs from rivet electrical contacts and its use method. See Chinese Patent No. 201310...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14B24B31/14B24D18/00H01H11/04
CPCB24B31/14B24D18/009C09K3/1481H01H11/04
Inventor 黄文明王珩孙启波林万焕
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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