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Cold forging process of clutch sleeve

A clutch sleeve and cold forging technology, which is applied in the field of cold forging of clutch sleeves, can solve the problems of affecting the accuracy of blank parts, warm forging is easy to produce forging, and the cost of coating heating is high, so as to improve cutting efficiency and product dimensional accuracy , Process energy saving effect

Active Publication Date: 2017-08-11
JIANGSU CHUANGYI PRECISION FORGING
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Warm forging mold materials are required to have high wear resistance, red hardness and less decarburization, but there are almost no lubricants that can effectively cool down in the temperature range exceeding 400 ° C, so the use of molds The life is short, and the temperature error during warm forging will directly affect the accuracy of the blank
[0003] Therefore, the main problems of the existing clutch sleeve processing technology are: heavy blanking weight; high coating heating cost; large machining allowance; rough machining process is required; warm forging is prone to forging defects

Method used

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  • Cold forging process of clutch sleeve

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Effect test

Embodiment Construction

[0022] A cold forging process for a clutch sleeve, comprising the steps of:

[0023] Blanking: Using a circular saw, the blank is cut into bars of set length and weight.

[0024] Spheroidizing annealing: put the bar into the well-type resistance furnace, vacuumize to the air pressure ≤ -0.08MPa, keep the pressure for 20 minutes without rising, confirm that the tank of the well-type resistance furnace is airtight and heat it to 300-400 ℃, open the valve to remove the moisture in the furnace gas, and then fill nitrogen to 0.1MPa for the second time, then start heating. During heating, heat preservation and slow cooling, the pressure of the furnace tank is maintained at 0.1-0.2MPa, the heating temperature is 765℃, the holding time is 4.5 hours, and the furnace is released Temperature≤350℃.

[0025] Shot blasting: Shot blasting is performed on the surface of the bar. The shot blasting machine uses the motor to drive the impeller body to rotate, and throws the steel shot with a di...

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Abstract

The invention discloses a cold forging process of a clutch sleeve. The cold forging process comprises the steps of: blanking-spheroidizing annealing-shot blasting-pretreatment-cold forging-inner hole drilling-thermal refining-sleeve boring-sleeving outside. The forging temperature of cold forging is room temperature; the product structure grains are finer, and the surfaces are not oxidized and decarbonized, so that the size precision is high, and the surface roughness is low; a traditional phosphorus saponification treatment lubricant treatment process is mature; and the mold service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the processing technology of a clutch sleeve, and more specifically relates to a cold forging process of a clutch sleeve. Background technique [0002] The processing technology of the existing clutch sleeve is mainly a warm forging process. For warm forging, when the steel is put into the mold cavity, the temperature must be 800°C. At this time, even a difference of 10°C will cause coarse crystallization or defects in the crystallization structure. The steel with surface defects cannot get the necessary pressure compounding under the pressure in the grinding tool, causing cracks to occur inside. Warm forging mold materials are required to have high wear resistance, red hardness and less decarburization, but there are almost no lubricants that can effectively cool down in the temperature range exceeding 400 ° C, so the use of molds The life is short, and the temperature error during warm forging will directly affect the accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 邢巧梅康林聂相宜
Owner JIANGSU CHUANGYI PRECISION FORGING
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