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Closed type forging technology of light and thin type conjunction gear

A closed-type forging and closed-tooth-type technology, which is applied in the field of light and thin type combined with closed-tooth forging technology, can solve problems such as unsuitability for rolling and expansion molding, achieve good hardenability and carburizing ability, improve utilization rate, and improve quenching. The effect of permeability

Active Publication Date: 2018-07-27
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rolling and expanding can improve the utilization rate of materials, but some products are not suitable for rolling and expanding, such as light and thin coupling teeth with deep inner steps. Therefore, how to design a reasonable process for this type of coupling teeth will ensure its The quality of processing can further improve the utilization rate of materials, which has become a new problem to be solved.

Method used

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  • Closed type forging technology of light and thin type conjunction gear
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  • Closed type forging technology of light and thin type conjunction gear

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Embodiment

[0026] A light and thin combined tooth closed forging process of the present invention, such as Figure 1 to Figure 3 shown, including the following steps:

[0027] 1) Feeding; the raw material is carburized steel, and the mass percentage of its composition is: C: 0.25%~0.3%, Si: 0.15%~0.35%, Cr: 0.15%~0.5%, Mn: 0.3%~1.2%, Ni : 2%~3%, Mo: 0.5%~0.75%, V: 0.05%~0.15%, W: 0.8%~1.2%, Ti: 0.035%~0.05%, B: 0.001%~0.005%, Rem: 0.01 %~0.015%, S≤0.02%, P≤0.02%, the balance is Fe;

[0028] 2) Pre-forging;

[0029] 3) Reaming, using a cold rolling ring machine to expand the inner diameter of the workpiece 1 to the target size;

[0030] 4) Heating workpiece 1;

[0031] 5) Final forging, forging the workpiece 1 through the closed forging die 2;

[0032] 6) Normalizing by using the residual heat of forging, the normalizing is isothermal normalizing;

[0033] 7) Carburizing, using carburizing technology to carry out surface hardening treatment on the whole workpiece 1;

[0034] 8) Que...

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Abstract

The invention discloses a closed type forging technology of a light and thin type conjunction gear. The closed type forging technology of the light and thin type conjunction gear comprises the following steps of (1) conducting feeding, (2) conducting pre-forging, (3) conducting hole enlarging, wherein the inner diameter of a workpiece is increased to a target dimension through a cold rolling ringmachine, (4) heating the workpiece, (5) conducting finish forging, wherein the workpiece is forged and formed through a closed type forging die, (6) conducting normalization with forging waste heat; (7) conducting carburization, wherein surface hardening treatment is conducted on the overall workpiece through a carburization technology, (8) conducting quenching, wherein heating and quenching are conducted on the overall workpiece, (9) conducting tempering, wherein low-temperature quenching is conducted on the overall workpiece. The closed type forging technology of the light and thin type conjunction gear is suitable for formation of light and thin conjunction gears, especially the light and thin conjunction gears with deep inner steps, improves the utilization rate of materials and improves the efficiency of follow-up fine trimming; normalization treatment is conducted through the forging waste heat, so that the energy consumption is greatly reduced, and the productivity is improved;and the surface hardness of the workpiece is improved through carburization treatment, and the service life of the gear product is prolonged.

Description

technical field [0001] The invention relates to the technical field of advanced manufacturing and automation, in particular to a light and thin combined tooth closed forging process. Background technique [0002] Gearbox parts have always been under a very harsh working environment, so the performance requirements for gearbox parts have always been much higher than ordinary parts. Gearboxes are dominated by shafts and gears, and forged products have always been the main production method for automotive gearbox parts because of their material saving, energy saving, high output, and high performance. [0003] Rolling and expanding can improve the utilization rate of materials, but some products are not suitable for rolling and expanding, such as light and thin coupling teeth with deep inner steps. Therefore, how to design a reasonable process for this type of coupling teeth will ensure its The quality of processing can further improve the utilization rate of materials, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/02B21J13/10C22C38/02C22C38/04C22C38/44C22C38/46C22C38/50C22C38/54C21D1/18C21D9/32C21D1/28C23C8/22
CPCB21J5/00B21J5/025B21J13/10C21D1/18C21D1/28C21D9/32C22C38/02C22C38/04C22C38/44C22C38/46C22C38/50C22C38/54C23C8/22
Inventor 陈波王正国陆以春易立
Owner JIANGSU BAOJIE FORGING
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