Preparation method for drive motor shaft of new energy automobile

A new energy vehicle and drive motor technology, applied in the field of metal parts processing, can solve problems such as damage to the metal streamline structure, poor tooth profile strength of internal splines, and splines are prone to fatigue and fracture, and achieve good quality stability and high molding size The effect of high precision and omitting the pickling step

Inactive Publication Date: 2018-05-22
浙江浙研冷挤压有限公司
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AI Technical Summary

Problems solved by technology

The general new energy vehicle drive motor shaft mainly uses the gear shaping machine tool to process the internal spline, which has problems such as poor strength of the internal spline tooth profile, low precision, easy fatigue fracture at the spline, low processing efficiency, and damage to the metal streamline structure. , reducing its service life
As a result, cold extrusion molding technology came into being, but most of them are processed together with hot forging blank making technology, the process is complicated, the process is complicated, and the hot forging process is prone to decarburization problems, the strength of forgings is reduced, and the precision is low.

Method used

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  • Preparation method for drive motor shaft of new energy automobile

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Embodiment Construction

[0031] Now in conjunction with accompanying drawing, the present invention will be further described:

[0032] The preparation method of a new energy vehicle drive motor shaft described in this embodiment comprises the following steps:

[0033] A. Round steel blanking and stress relief: According to the process requirements, cut the round steel billet into the required length and put it into the heating furnace for heating. When the temperature reaches 600°C, stop heating and keep it warm in the furnace for 8 hour, realize stress relief treatment, the round steel billet material described in the present embodiment adopts 20CrMnTi;

[0034] B. Surface sandblasting, phosphating, and saponification treatment; wherein the process of phosphating and saponification treatment is: artificial pretreatment of the workpiece → degreasing and degreasing → washing → rinsing → phosphating → washing → saponification → drying, wherein the phosphating The temperature is 70°C-80°C, the time is ...

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Abstract

The invention relates to a preparation method for a drive motor shaft of a new energy automobile. The preparation method includes the steps of round steel blanking, stress relieving, surface sand blasting, phosphating, saponification treatment, cold extruding outer shaping, internal spline manufacturing, machining, heat treatment and the like. According to the preparation method for the drive motor shaft of the new energy automobile, cold extrusion is adopted to replace traditional gear shaping molding process, and prior hot forging process of blanks is omitted, so that the strength of products and the tooth profile accuracy are effectively improved; and the preparation method for the drive motor shaft of the new energy automobile has the advantages of reasonable process, raw material saving, cost saving, simple operation, stable work, high production efficiency, high product qualification rate, and good molding quality.

Description

technical field [0001] The invention relates to the technical field of metal parts processing, in particular to a method for preparing a drive motor shaft of a new energy vehicle. Background technique [0002] With the rapid development of new energy vehicles, the requirements for the power system of new energy vehicles are also getting higher and higher. As a key component in the entire power system, the motor shaft of the new energy drive motor plays the role of fixing the rotor core and transmitting power. Its performance directly determines the performance of the new energy vehicle power system. The general new energy vehicle drive motor shaft mainly uses the gear shaping machine tool to process the internal spline, which has problems such as poor strength of the internal spline tooth profile, low precision, easy fatigue fracture at the spline, low processing efficiency, and damage to the metal streamline structure. , reducing its service life. As a result, cold extrus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/50
Inventor 徐军辉
Owner 浙江浙研冷挤压有限公司
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