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All-fiber-texture large-size double-flange fan main shaft forging method

A double-flange, full-fiber technology, applied in the field of forging, can solve the problems of poor impact resistance at the root of the flange, easy deformation of the flange, and easy vibration during operation, so as to eliminate the poor impact resistance and meet the design requirements. , the effect of considerable economic benefits

Active Publication Date: 2014-12-03
陕西华威科技股份有限公司
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  • Abstract
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for forging a large-scale double-flange motor spindle with full fiber structure, which solves the problem of directly cutting the fibrous structure of the material and forcing it into shape during the production process of the existing large-scale double-flange motor spindle, so that after the spindle forging is formed The overall fiber structure has no continuity, the impact resistance of the flange root is poor, the flange is easily deformed, the balance is poor, the operation is prone to vibration, noise and even breaks from the flange root.

Method used

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] The forging process of the 45A large double-flange motor spindle includes the following steps:

[0030] a. According to the quality control requirements of raw materials, 45A steel ingots smelted by electric arc furnace + external refining + vacuum degassing are selected as raw materials, which conform to Q / HWG-QW07009-2000, and the content of harmful elements and gases in the chemical composition is controlled to be S≤0.020 , P≤0.015, H≤2ppm, O≤30ppm, N≤65ppm, Cu≤0.20, to ensure the purity and grain refinement of steel;

[0031] b. If figure 1 As shown, put the ingot into a heating furnace with a temperature lower than 450°C for preheating and heat preservation for 5 hours, then raise the temperature at 60°C per hour to 650°C for 4 hours, and then heat it at 60°C per hour to 850°C for 5 hours. Finally, the temperature is raised from...

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Abstract

The invention discloses an all-fiber-texture large-size double-flange fan main shaft forging method which comprises the steps of raw material smelting quality control, heating, primary firing twice-upsetting and drawing out, number printing, blanket making, secondary firing finish forging forming until a technical dimension of a forged piece is obtained, wherein after being forged, a double-flange fan main shaft forged piece is subjected to primary supercooling, normalizing and tempering heat treatment, rough turning, ultrasonic flaw detection, mechanical property testing, semi finish turning processing, deep hole drilling, stable heat treatment and packaging. The double-flange motor main shaft forged by the all-fiber-texture large-size double-flange fan main shaft forging method is of an all-fiber-texture structure, so that the natural defects that a flange formed by cutting is easy to deform and low in structural balance property and the root is easy to break are completely overcome; the impact mechanical property of the root is improved, the material consumption is reduced, and a requirement of a large-size motor on the main shaft design is met; furthermore, compared with the conventional forging method, the main forging process has the advantages that another operation of firing is reduced, and the economical benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of forging, and relates to a forging method for a large double-flange motor main shaft with full fiber structure. Background technique [0002] At present, the large-scale development of equipment in the fields of electric power, petrochemical, and shipbuilding is very rapid, and the construction of generating sets in power plants is also increasing. In the manufacturing process of large generator sets, the quality of the main shaft largely determines the stability and safety of the generator set operation. [0003] The existing method for forging the main shaft of a large-scale double-flange motor is to use a triangular chopping knife to forge the flange step and use a turning tool to cut chips out of the flange step. The overall fibrous structure has no continuity, which affects the impact resistance of the flange root, which is easy to break the root, cause accidents, reduce the service life of the gener...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21K1/06B21J1/06
CPCB21K1/06B23P15/00F16C3/02
Inventor 王璋
Owner 陕西华威科技股份有限公司
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