Tooth-surface shot-blasting strengthening method for spiral bevel gear

A spiral bevel gear and shot peening technology, which is applied in the field of shot peening of the tooth surface of the spiral bevel gear, can solve the problems of increasing the surface roughness value and the inability to meet the roughness, so as to improve the surface integrity and improve the surface integrity. performance and fatigue properties, and the effect of improving surface integrity

Active Publication Date: 2020-02-07
ZHONGNAN TRANSMISSION MACHINERY FACTORY CHANGSHAAVIATION IND
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface roughness value increases after shot peening using the existing one-time shot peening method, which cannot meet the roughness requirements

Method used

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  • Tooth-surface shot-blasting strengthening method for spiral bevel gear
  • Tooth-surface shot-blasting strengthening method for spiral bevel gear
  • Tooth-surface shot-blasting strengthening method for spiral bevel gear

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Embodiment 1

[0029] Such as Figure 5 As shown, a tooth surface shot peening method of a spiral bevel gear of the present embodiment comprises the following steps:

[0030] (1) Use the MP1000Ti pneumatic CNC shot blasting machine produced by the French Wheelabrator Group Co., Ltd., and select the projectile model SAE170 (projectile diameter 0.4mm, hardness HRC45~HRC52) cast steel shot to perform shot peening on the 18Cr2Ni4WA steel spiral bevel gear.

[0031] (2) Parts are cleaned and degreased before shot peening to remove dirt and oil stains on the surface of the parts. The cleaning liquid is selected from organic solvents (hydrocarbon cleaning agent is used in this embodiment, aviation gasoline can be used in other embodiments), and the treatment temperature is normal temperature. , The degreasing time is 5min~10min (the degreasing time of this embodiment is 8min).

[0032] (3) The non-shot blasting area of ​​the part is protected, and the combined protection device is used to protect ...

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Abstract

The invention discloses a tooth-surface shot-blasting strengthening method for a spiral bevel gear. The tooth-surface shot-blasting strengthening method for the spiral bevel gear comprises the following steps that the spiral bevel gear is pre-treated to remove surface impurities; a test piece is used for simulating a shot-blasting test, so that the camber height value of the test piece is obtainedto determine a shot-blasting strength value; a non-shot-blasted area of the spiral bevel gear is protected through a protection device; primary shot-blasting is conducted on the tooth surface of thespiral bevel gear, wherein during primary shot-blasting, the air pressure is 2.5+/-0.25Bar; secondary shot-blasting is conducted on the tooth surface of the spiral bevel gear, wherein during secondaryshot-blasting, the air pressure is 1.3+/-0.25Bar; and the protection device is removed, and the spiral bevel gear is cleaned. According to the tooth-surface shot-blasting strengthening method for thespiral bevel gear, after two times of shot-blasting, the roughness of the tooth surface meets requirements.

Description

technical field [0001] The invention relates to the field of surface treatment of gears, in particular to a tooth surface shot peening method for spiral bevel gears. Background technique [0002] The surface strength of 18Cr2Ni4WA spiral bevel gear steel needs to be shot peened to improve the fatigue performance. The process of shot peening is a process in which high-speed moving projectiles are continuously sprayed on the surface of the part, causing extremely strong plastic deformation on the metal surface layer. , forming a thin layer of cold work hardening layer densely covered with countless smooth hemispherical pits (the depth is about 0.07mm ~ 0.5mm), also called surface strengthening layer. After shot peening, the roughness of the tooth surface of the spiral bevel gear decreases, which weakens the beneficial effect of shot peening to a certain extent. Avoiding weakening factors (increased roughness, etc.) is the key to obtaining the best shot peening results. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D7/06
CPCC21D7/06
Inventor 张媛媛许浩谢焕钧陈丽辉孙驹
Owner ZHONGNAN TRANSMISSION MACHINERY FACTORY CHANGSHAAVIATION IND
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