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Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof

A technology of shifting fork groove and depth, applied in heat treatment equipment, heat treatment furnace, manufacturing tools, etc., can solve problems such as failure to meet process requirements, difficult to meet millimeter level requirements, and process difficulties

Inactive Publication Date: 2011-06-22
马成训
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most enterprises that produce shift forks are mainly faced with the following two problems. First, when producing some shift forks with a large gap between internal and external hardness requirements, there are great difficulties in the process; second, the produced shift forks Most of the groove ends cannot meet the technical requirements for limited depth hardening, and it is difficult to meet the millimeter-level requirements; the present invention effectively solves the above two problems through the improvement of the process and special equipment

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  • Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof
  • Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof
  • Heat treatment process of limited deep hardening of groove end of shifting fork and special device thereof

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the present invention is described in detail as follows:

[0019] As shown in the accompanying drawings, the present invention is a heat treatment process for hardening the groove end of the shift fork with limited depth, which includes the following steps: (1) partially Carry out high-frequency induction quenching treatment; (2) Cooling the groove end by spraying cooling water through the jet pipe; (3) Partial tempering of the groove end.

[0020] In order to avoid insufficient hardness at the front edge of the groove end, a magnetizer is added at the front of the groove end. The magnetizer is a silicon steel sheet to reduce the dissipation of the magnetic force lines and improve the induction efficiency.

[0021] The temperature of the cooling water used is 35°C±5°C, and the spray pipe adopts a flat spray pipe. At the same time, in order to avoid the possibility of high hardness outside the fork groove end, compressed ai...

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Abstract

The invention discloses a heat treatment process of the limited deep hardening of the groove end of a shifting fork and a special parallel sheet-shaped double-circuit curved surface notched inside induction coil thereof, belongs to the processing field of heat treatment. The heat treatment process comprises the following steps: (1) high-frequency induction quenching is performed to local groove end of the shifting fork which is forged preliminarily, normalized and machined; (2) cooling water is injected by an injection pipe to cool the groove end; and (3) tempering local groove end; in addition, when high-frequency induction quenching treatment is performed to local groove end, a CYP-40 super-audio frequency induction heating device is used and the parallel sheet-shaped double-circuit curved surface notched inside induction coil is added aiming at the characteristic of the groove end that the both sides are thin and the middle is thick; and in order to prevent that the hardness of the front edge is not enough, a silicon steel plate is added on the front part of the groove end, thus the loss of magnetic lines can be lowered and the induction efficiency can be increased.

Description

technical field [0001] The invention relates to a heat treatment process and the field of equipment used, in particular to a heat treatment process and special equipment for hardening the groove end of a shift fork to a limited depth. Background technique [0002] At present, most enterprises that produce shift forks are mainly faced with the following two problems. First, when producing some shift forks with a large gap between internal and external hardness requirements, there are great difficulties in the process; second, the produced shift forks Most of the groove ends cannot meet the technical requirements for finite depth hardening, and it is difficult to meet the millimeter-level requirements; the present invention effectively solves the above two problems through the improvement of the technology and special equipment. Contents of the invention [0003] The technical task of the present invention is to address the deficiencies in the above-mentioned technologies, a...

Claims

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Application Information

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IPC IPC(8): C21D9/00
Inventor 赵昌德李广胜王波
Owner 马成训
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