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Input shaft sleeve precision forging method

An input shaft sleeve and precision forging technology is applied in the field of metal forging die technology, which can solve the problems of short service life of the die, increased manufacturing cost, low production efficiency of cutting process, etc., and achieves high production efficiency, low forging cost, and blank production. convenient effects

Inactive Publication Date: 2015-08-26
JIANGSU PACIFIC PRECISION FORGING +1
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Problems solved by technology

First of all, the general-purpose cutting process can achieve precise forming processing. The disadvantage is that the production efficiency of the cutting process is low, and it is only suitable for single-piece or small-batch production applications.
Due to the high-strength forging, the tool life is short, resulting in increased manufacturing costs

Method used

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  • Input shaft sleeve precision forging method
  • Input shaft sleeve precision forging method
  • Input shaft sleeve precision forging method

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Embodiment Construction

[0016] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0017] The precision forging forming method of the input shaft sleeve described in the present invention is a manufacturing method using a composite forging process. Its core technology is embodied in the step-by-step implementation of warm forging pre-forming and cold precision forging forming to organize production. The specific steps are as follows: One-step billet making, first calculate the bar size according to the size of the forging billet, cut the billet according to the conventional method, and remove the billet skin by cutting method; the second step is warm forging pre-forming, put the billet from which the skin has been removed and put it in the furnace for heating , this embodiment is an input shaft sleeve for a car gearbox. The material of the blank is 16MnCr5. The blank is heated to 800°C to 820°C. The heated blank is tak...

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Abstract

The invention discloses an input shaft sleeve precision forging method. The compound forging technology is adopted in the method. The method comprises the specific steps of blank manufacturing, warm forging preforming, punching, annealing, shot blasting, surface lubricating and cold precision forging. According to the method, input shaft sleeves are manufactured efficiently by the step-by-step forging technology, and warm forging preforming, punching and cold precision forging are die forging procedures and respectively undertake different forging tasks. Due to the adoption of the decentralized process route, molding capacity is reasonably distributed into three dies; accordingly, on one hand, the requirement for the tonnage of a matched press is low, forging force born by each die is small, and die expansion and die fatigue damage accidents are avoided; on the other hand, metal in the dies is extruded step by step, and die filling is well achieved. Most important of all, the density of metal issue of a tooth part formed through precision forging is high, and metal fiber can not be damaged for no reason, so that the strength index of the tooth part is high and product quality meets automotive matching requirements.

Description

technical field [0001] The invention relates to a metal forging die process, in particular to a closed die forging process, in particular to a precise forging forming method of an input shaft sleeve. Background technique [0002] The input shaft sleeve is the supporting transmission part of the automobile gearbox, and the upper and lower end surfaces and the outer peripheral wall of the large end are provided with alternate concave and convex teeth. Under the existing technological conditions, there are three relatively mature forming methods to realize the processing of this kind of component with three-sided teeth at the big end. First of all, the general-purpose cutting process can achieve precise forming processing. The disadvantage is that the production efficiency of the cutting process is low, and it is only suitable for single-piece or small-batch production applications. The second is to use the powder metallurgy process to produce the input shaft sleeve. Although ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 刘志群卫飞张贵华
Owner JIANGSU PACIFIC PRECISION FORGING