Gear shaft forging process

A gear shaft and process technology, applied in the field of forging, can solve problems such as low quality, high material loss, and short service life, and achieve the effects of improving production efficiency and income, good processing uniformity, and simple process flow

Inactive Publication Date: 2018-12-14
杭州金越晟重型机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing shaft forging process, due to various problems in the process design, the process cycle of the casting is longer, the material loss is more, time-consuming and labor-intensive, the manufacturing cost is high, the production efficiency is low, and there are Defects such as uneven internal structure of the product cause unstable performance, low quality and short service life

Method used

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Experimental program
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Embodiment Construction

[0030] A gear shaft forging process, comprising the following steps:

[0031] (1) Material selection: vacuum degassing + refining ingots are used as raw materials to ensure the hardenability, purity and grain refinement of the steel; the Ca content in the steel for forgings is not more than 10ppm, and Ca deoxidation treatment is not allowed. The chemical composition is analyzed by furnace sampling according to ASTMA751 standard, and the deviation of finished product analysis conforms to ASTMA29 / A29M regulations.

[0032] (2) Pre-treatment: The surface of the steel ingot is ground, polished, rolled, degreasing and other surface treatments, the grinding depth is not more than 1.5% of the effective size, and the grinding depth-width ratio is less than 1:6 to remove the surface cracks of the steel ingot , pits, scars, pores and other defects, UT inspection defects are not greater than φ2.

[0033] (3) Use a 4t or 8t electro-hydraulic hammer for the first heating and forging of th...

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PUM

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Abstract

The invention mainly discloses a gear shaft forging process. According to the technical field, the gear shaft forging process comprises the steps of material selection, pretreatment, drawing as an initial blank, primary fire forging and upsetting, drawing to a standard specification, heating in a furnace, secondary fire forging and drawing, material separation, drawing of a small end, rounding andfinishing, and cooling and annealing after forging. The product raw material loss is low in the manufacturing process, so that the production cost is reduced; and the product is stable in performance, high in strength and free of damage, so that the production efficiency and the production benefit are greatly improved.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a gear shaft forging process. Background technique [0002] Forging is a processing method that uses a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size, and is one of the two major components of forging (forging and stamping). In the field of machinery, forging is widely used in many aspects. For example, the manufacture of automobile output shafts is mainly completed by forging. However, in the existing shaft forging process, due to various problems in the process design, the process cycle of the casting is long, the material loss is large, time-consuming and labor-intensive, the manufacturing cost is high, the production efficiency is low, and there are Defects such as uneven internal structure of the product result in unstable performance, low quality and short service li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/12
CPCB21K1/12
Inventor 高生李海龙梁光书信东辉谢国荣
Owner 杭州金越晟重型机械有限公司
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