Forging process for inner star wheel

A technology of inner star wheel and process, applied in the field of forging, can solve the problems of uneven temperature of forgings, affecting the metal structure and mechanical properties of forgings, uneven heat distribution of forgings, etc., and achieve the effect of uniform temperature, excellent metal structure and mechanical properties

Inactive Publication Date: 2020-07-10
上海长特锻造有限公司
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Problems solved by technology

[0004] The above existing technical solutions have the following defects: due to the uneven surface of the inner star wheel, the temperature of each position on the surface of the forging is likely to be different during cooling before annealing, and then the same time and heating temperature during annealing will cause the forging to be uneven. The uneven distribution of heat will affect the required metal structure and mechanical properties of forgings

Method used

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  • Forging process for inner star wheel
  • Forging process for inner star wheel
  • Forging process for inner star wheel

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Embodiment Construction

[0029] As mentioned in the background technology, due to the uneven surface of the inner star wheel, the existing forging process cannot equalize the temperature of each part of the inner star wheel forging before heat treatment, which affects the required metal structure and mechanical properties of the part.

[0030] In order to solve the above problems, the present invention discloses a forging process of an inner star wheel, which can ensure that the temperature of the surface of the forging is uniform before heat treatment, and is beneficial to obtain the required metal structure and mechanical properties of the forging.

[0031] The above object of the present invention is achieved through the following technical solutions, and the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] figure 1 It is a flow chart of the forging process of an inner star wheel in the embodiment of the present ...

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Abstract

The invention relates to a forging process of an inner star wheel. The forging process comprises the following steps of: S101, obtaining an inner star wheel forging piece through forging; S102, placing the inner star wheel forging piece in a high-temperature furnace for heat preservation; S103: placing the inner star wheel forging piece in a sand pit after heat preservation; and S104, performing heat treatment to the inner star wheel forging piece in the sand pit. The forging process can ensure that the temperature of the surface of the forging piece is uniform before the heat treatment, and is beneficial to obtaining a metal structure and mechanical properties required by the forging.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging process of an inner star wheel. Background technique [0002] With the rapid development of the automobile industry, the constant velocity universal joint occupies an important position in the automotive drive shaft industry with its unique constant angular velocity torque transmission and superior mechanical properties, and the inner star wheel is the key component of the constant velocity universal joint . The inner star wheel is also called the star sleeve. The quality of the inner star wheel is related to the performance and life of the product. As an important part of auto parts, the inner star wheel is mostly made of forging. [0003] The Chinese patent with the publication number CN103710714B in the prior art discloses a heat treatment method for carburizing and quenching gears of automobile gearboxes, including: a carburizing step, placing the gears in a heatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/30B21K29/00C21D9/34
CPCB21K1/30B21K29/00C21D9/34
Inventor 张俊俊林象王振洲王欢陈国良
Owner 上海长特锻造有限公司
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