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Method for manufacturing connector of ratchet ring spanner

The technology of a ratchet wrench and its manufacturing method is applied in the field of connector manufacturing to achieve the effects of less energy consumption, stable dimensional control, and improved surface roughness

Inactive Publication Date: 2013-12-18
DANYANG CITY EAGLE TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the purpose of the present invention is to provide a method for manufacturing the connector of the ring ratchet wrench, which uses powder metallurgy (MIM) technology to solve the problem of unstable machining accuracy in mass production of machining, so as to improve efficiency. cut costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The manufacturing method of the connecting head of the plum blossom ratchet wrench comprises the following steps: 1) batching, 2) injection molding, 3) extraction, 4) sintering; it is characterized in that:

[0011] 1. Ingredients: take: 50-85 parts of stainless steel powder; 5-8 parts of wax, 2.3-2.8 parts of polypropylene, 6.5-7.3 parts of low-pressure polyethylene, 4.5-5.2 parts of thermoplastic elastomer; mix and heat to control the temperature at 170-200°C, the time is controlled at 20-30 minutes, after the material is discharged, the mixed material is cut into pieces, cooled and crushed;

[0012] 2. Injection molding: the above-mentioned mixed material is injected into a blank by an injection molding machine through a mold;

[0013] 3. Extraction: put the injection blank into a trichlorethylene solvent with a purity of 99.9%, the amount added is based on covering the blank by 10-20mm, and keep warm at a temperature of 50-60°C for 5-6 hours;

[0014] 4. Sinter...

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PUM

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Abstract

The invention discloses a method for manufacturing a connector of a ratchet ring spanner. The method comprises the following steps of 1) burdening; 2) injection molding; 3) extracting; 4) sintering. According to the method, the problem that the connector is difficultly machined can be solved, the dimensional precision of the connector, and especially, the surface roughness of a half-moon slot can be greatly improved, so as to play a deceive role in increasing the service life of the connector. The dimensional precision of the connector can be controlled in a range of 0.05mm. The twisting force of the spanner can reach up to 1.4 times of an American standard, and the life can reach up to more than 2 times of the American standard.

Description

technical field [0001] The invention relates to a method for manufacturing a connecting head of a plum blossom ratchet wrench. Background technique [0002] The connection head of the ring ratchet wrench is made of stainless steel. The processing method used before is machining. When processing by turning, there are about 15 processes and 10 laborers are used. Since the material used in the lathing process is a solid bar, the weight before processing is three times the weight of the finished product after processing, and the waste of material is serious; the processing accuracy of mass production is unstable, and the burrs generated by lathe processing are a problem that plagues the entire industry, which is time-consuming. Laborious; many processes, high precision, difficult inspection of the production process, high skill requirements for operators, unable to effectively guarantee product quality, high scrap rate, not suitable for mass production, and unable to meet market...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115B22F3/26B22F3/10
Inventor 朱荣祥
Owner DANYANG CITY EAGLE TOOLS