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Machining process of marine gear

A processing technology, marine gear technology, applied in the field of gear processing, can solve the problems of transmission shaft grinding or gnawing, transmission shaft scrapping, large deformation, etc., and achieve the effect of reducing surface stress and hardness

Inactive Publication Date: 2017-07-21
孙阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two processes have limitations. The tooth surface hardness obtained by high-frequency quenching can only reach 52-58HRC, and the deformation is relatively large; although carburizing and quenching can obtain high tooth surface hardness and deformation can be controlled, but at the same time The gear hole has also obtained a higher hardness, and it is easy to grind or gnaw the outer circle of the transmission shaft during interference fit and sliding fit, resulting in the scrapping of the transmission shaft

Method used

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  • Machining process of marine gear

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Embodiment

[0010] A marine gear processing technology, step 1, forging, choose 20CrMnTiH as the material, reserve 2.5mm allowance on one side according to the requirements of the drawing, and forge and shape; Insulate for 2 hours, and air-cool after being out of the furnace; step 3, rough turning, remove a large number of allowance holes, leave 2mm allowance on the end surface of the hole, and leave 1mm allowance on the rest of the surface, and the roughness is guaranteed to be Ra6.3; step 4, inner hole (3), inner hole There is a margin of 1.5-1.6mm on one side of the end face (2), and the rest of the surface is finely turned in place, and the roughness is guaranteed to be Ra3.2; step five, hobbing, to shape the tooth shape of the gear; step six, carburizing, passing Carburizing in a multi-purpose furnace, the hardened layer depth is 1.0-1.5mm, slowly cooling in a protective atmosphere to below 100°C and leaving the furnace for air cooling; step 7, finish turning after carburizing, finish...

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Abstract

The invention discloses a machining process of a gear. The machining process comprises the following steps of forging, normalizing, rough turning, finish turning, hobbing, carburizing, inner hole and inner hole end face finish turning, quenching, tempering, shot blasting, inner hole and inner hole end face grinding, key groove cutting and final finished product obtaining. According to the machining process of the gear, the gear face can have high hardness, the core strength can be guaranteed, the surface hardness of a hole in the transmission shaft cooperation position is reduced, meanwhile, structure stress is reduced, and the use performance of the gear is more reasonable.

Description

technical field [0001] The invention relates to a gear processing method, in particular to a processing technology of a marine gear installed on a transmission shaft. Background technique [0002] Gears are transmission parts of marine gearboxes, and their processing technology directly affects the service life and maintenance costs of gearboxes. Traditional gear processing process: high-frequency quenching of medium-carbon alloy steel (such as 40Cr, 42CrMn): blanking - forging - quenching and tempering - rough and fine turning - tooth profile processing - high-frequency quenching - tempering ——Grinding, or carburizing and quenching with low-carbon alloy steel (such as 20CrMnTi, 20Cr): blanking—forging—normalizing—rough and fine turning—tooth processing—carburizing and quenching—tempering— - Grinding. However, these two processes have limitations. The tooth surface hardness obtained by high-frequency quenching can only reach 52-58HRC, and the deformation is relatively larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 孙阳
Owner 孙阳
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