Fabrication technology of big flange stub axle type components

A manufacturing process and large flange technology, which is applied in the field of large flange and short shaft parts manufacturing process, can solve the problems that the technical requirements cannot be met, the flange end cannot reach the forging ratio, and the forging allowance is large, so as to shorten the cold working hours, Save raw materials and improve forgeability

Inactive Publication Date: 2008-02-06
天津市天重江天重工有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The original free forging process is to press the program by upsetting, and then elongate to form the size of each section, but the flange end cannot reach the forging ratio during the forming process, so the internal defects cannot be forged, the quality is poor, a...

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  • Fabrication technology of big flange stub axle type components

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Embodiment Construction

[0013] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given hereby, and the details are as follows:

[0014] The manufacturing process of the large flange and short shaft parts of the present invention includes the following steps: smelting→refining→vacuum casting→forging→first heat treatment after forging→detection (preliminary investigation)→rough machining→ultrasonic flaw detection→performance heat treatment→sampling for mechanical energy inspection, ultrasonic Flaw detection→semi-finishing→stress relief→finishing.

[0015] The main technological process of the forging of the present invention is as follows: heating → chamfering, cutting nozzle → upsetting, elongating and compacting → blanking → preform → die forging, firstly the preform is forged by free forging on a large hydraulic press, and then Put the preform in the mold and forge the die forgings close to the size of the finished ...

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PUM

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Abstract

The invention relates to a processing technique for large flange short-axle type parts. The invention is characterized in that: the processing technique comprises the processing procedures of refining, forging, heat treating, detecting, and machining. The forging processing procedure is that: firstly a preformed stock is forged by free forging on a large-size hydraulic machine, and secondly, the preformed stock is placed in the die to be vertically upset forged into a die-forging part the dimension of which is approximate to that of a finish product. The invention overcomes the drawbacks that the large water press can only freely form by large-size forging piece, and can save raw materials and shorten cold processing time. The invention has the most advantage that the processing technique improves forging ability of the large flange arranged at the end of large flange short-axle parts.

Description

technical field [0001] The invention relates to the manufacture of a main shaft of a large-scale wind power generating set, in particular to a manufacturing process of a short shaft with a large flange. Background technique [0002] At present, in terms of the forging process of the main shaft of large-scale wind turbines, domestic and foreign fan shaft manufacturers generally adopt the traditional free forging process. In the present invention, the main process is: heating→pressing the jaws, chamfering, cutting nozzle→upsetting, elongating and compacting→cutting→preform→upsetting and forging the flange to the size of the forging→demoulding. The original free forging process is to press the program by upsetting, and then elongate to form the size of each section, but the flange end cannot reach the forging ratio during the forming process, so that the internal defects cannot be forged, the quality is poor, and the technology cannot be achieved. Require. Moreover, the tradi...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J13/02B21K1/06B23P15/00
Inventor 孙书静
Owner 天津市天重江天重工有限公司
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