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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 high coating heating cost, short service life of molds, influence on the accuracy of blank parts, etc., so as to save process energy consumption and improve cutting efficiency. , The effect of reducing machining allowance

Active Publication Date: 2019-03-22
JIANGSU CHUANGYI PRECISION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A cold forging process of a clutch sleeve includes the following steps:

[0023] Cutting: Use a circular saw to cut the blank into bars of set length and weight.

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

[0025] Shot blasting: The surface of the bar is shot blasted. The shot blasting machine uses the motor to drive the impeller body to rotate, and uses the centrifugal force to throw a 0.6mm diameter steel shot onto the ...

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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 a processing technology of a clutch sleeve, and more particularly relates to a cold forging process of a clutch sleeve. Background technique [0002] The existing processing technology of the clutch sleeve is mainly a warm forging technology. For warm forging, when the steel is placed in the mold cavity, the temperature must be 800°C. At this time, even a difference of 10°C will cause coarse crystals or defects in the crystal structure. The steel with surface defects cannot get the necessary pressure recombination under the pressure in the abrasive tool, causing cracks inside. The mold material for warm forging requires high wear resistance, red hardness and less decarburization. However, there is almost no lubricant that can effectively cool the temperature in the temperature range over 400 ℃, so the use of the mold The life is short, and the temperature error during warm forging will directly affect the accuracy of the blank. [...

Claims

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Application Information

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Patent Type & Authority Patents(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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