Surface treatment method of rivet electric contact, grinding material and grinding material preparation method

A technology for surface treatment and electrical contacts, applied in heat treatment equipment, heat treatment furnaces, grinding/polishing equipment, etc., can solve problems such as short circuit faults, welding of electrical contacts, affecting the safe and reliable operation of electrical systems, and reduce contact The effect of resistance

Inactive Publication Date: 2017-11-24
FUDA ALLOY MATERIALS
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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.
[0003] As we all know, contact resistance is the most important parameter to characterize the quality and reliability of electrical contact materials. This is because contact resistance and contact temperature rise are co-dependent and mutually restrictive for a long time. The abnormal increase of contact resistance and contact temperature rise in engineering applications may Induce electrical contact welding, short-circuit fault, or even fire, which directly affects the safe and reliable operation of the electrical system

Method used

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  • Surface treatment method of rivet electric contact, grinding material and grinding material preparation method

Examples

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preparation example Construction

[0057] Preparation Example of Cylindrical Abrasives

[0058] Such as figure 1 As shown, the extrusion molding device includes a cylinder body 1, a material cavity 11 is arranged in the cylinder body, and an extrusion piece disposed in the material cavity is slid by a piston. The extrusion piece includes an extrusion head 21 and is fixedly connected to the extrusion The extrusion drive rod 22 at the rear end of the extrusion head, the outer end of the material chamber relative to the extrusion head is provided with a molding template 3, and the molding template is provided with a plurality of points along the extrusion direction of the extrusion head Cylindrical extrusion holes 31 distributed in arrays, the diameter of the cylindrical extrusion holes is 1-3 mm, preferably 1.5 mm; the length of the cylindrical extrusion holes is 3-10 mm, preferably 5 mm.

[0059] The preparation process is to put the mixed powder and epoxy resin in a mixer, take out the colloid after stirring, ...

Embodiment 1

[0076] Put the abrasive into the sizing agent, the sizing agent described in this embodiment is sulfonic acid, a kind of organic acid, the general formula R-SO3H, R represents a hydrocarbon group, strong acidity, relatively large water solubility, used for making dyes, medicines, Detergent, 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, 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 the product, remove the surface scale or other foreign matter, and then rinse it clean. The product is smoothed with a rolling and polishing machine, and then the product is rinsed clean. Put the product into the ultrasonic cleaning equipment for ul...

Embodiment 2

[0078] 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 15min, rinse and separate the product. Dry the product containing burrs and rings and put it into a vacuum furnace for annealing, set the temperature at 300°C, keep it for about 90 minutes, and then follow the furnace to room temperature and take it out. Use dilute sulfuric acid to pickle the product, remove the surface scale or other foreign matter, and then rinse it clean. The product is smoothed with a rolling and polishing machine, and then the product is rinsed clean. Put the product into the ultrasonic cleaning equipment for ultrasonic cleaning. The cleaned product is then dried, dried, and cooled to a finished product.

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Abstract

The invention discloses a surface treatment method of a rivet electric contact, a grinding material and a grinding material preparation method. The surface treatment method comprises the following steps that mixed powder and epoxy resin are mixed according to the ratio and then placed in a stirring machine; gel is taken out after stirring is conducted for a period of time and then squeezed to obtain a blank; after being subjected to cold storage for a period of time, the blank is taken out, and then the cylindrical grinding material is obtained; and through the grinding material, rammer-making burrs and ring marks of the rivet electric contact can be rapidly removed, and the contact resistance can be decreased. According to the grinding material and the grinding material preparation method, the rammer-making burrs and ring marks of the rivet electric contact can be simultaneously removed, and the contact resistance is decreased; and meanwhile the grinding time is shortened, the testing cost is saved, and technological support is provided for development of the low-voltage electrical apparatus industry.

Description

technical field [0001] The invention belongs to the field of surface treatment of materials, and specifically refers to a surface treatment method of a rivet electric contact, an abrasive material and a preparation method of the abrasive material, through which the contact resistance can be reduced, and the burrs and circle marks made by the rivet electric contact can be removed. 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. For the processing defects of rivet-type electrical contacts, the method of grinding is mainly used to remove them. The applicant has developed a method for remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B31/10B24B31/14C09K3/14C21D1/26C21D1/773C21D9/00
CPCB24B31/10B24B31/14C09K3/1409C21D1/26C21D1/773C21D9/0068
Inventor 王珩黄文明张秀芳林万焕
Owner FUDA ALLOY MATERIALS
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