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Middle shaft machining technology

A processing technology and intermediate shaft technology, applied in the field of transmission parts processing, can solve the problem of long processing time of the intermediate shaft, and achieve the effect of improving efficiency, speeding up progress and reducing processes

Inactive Publication Date: 2014-03-12
CHONGQING YUQING MACHINERY MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a machining process for the intermediate shaft to solve the problem that the intermediate shaft needs to be finished twice, resulting in a longer processing time of the intermediate shaft

Method used

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  • Middle shaft machining technology

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Embodiment Construction

[0023] A kind of intermediate shaft processing technique in the present embodiment, comprises the following steps:

[0024] a. Cutting material: 20CrMnTiH-GB / T5216-200 material is used.

[0025] b. Forging the billet: the forging billet is processed by die forging.

[0026] c. Isothermal normalizing: the hardness of isothermal normalizing is 160~190HB.

[0027] d. Finishing: for the size of the outer circle, a grinding allowance of 0.25mm is left for the part to be ground, and the rest is processed to the finished product size; the total axial length is 222.2-222.3 mm (the finished product size is 222.2±0.1mm), and the rest of the size is processed to Finished product size; runout of grinding parts and straightening is 0.02mm.

[0028] e. Gear hobbing: CNC five-axis hobbing gear shaving machine is adopted, the center hole at both ends of the shaft is positioned, the expansion sleeve pull rod is connected with the hydraulic cylinder of the machine tool, and the piston of the ...

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Abstract

The invention discloses a middle shaft machining technology. The middle shaft machining technology comprises the steps of blanking, forging, isothermal normalizing, finish turning, tooth manufacturing, spline rubbing, hole drilling, heat treatment, straightening, external grinding, cleaning, finished product detecting, and packaging and storing, wherein the length of blanks is turned into 222.2-222.3mm in the step of finish turning. According to the technology, the length of the blanks is turned into 222.2-222.3mm before heat treatment, working allowance of secondary finish turning is not reserved, a workpiece is made to reach the requirements of the size and beats of a middle shaft only through one time of finish turning before the heat treatment, and secondary finish turning is not needed, so that the machining processes of the middle shaft are reduced, middle shaft machining time is shortened, the middle shaft machining progress is quickened, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of transmission parts processing. Background technique [0002] The intermediate shaft is a transmission shaft in the automobile gearbox. The shaft itself is integrated with the gear, and its function is to transmit motion and power between the input shaft and the output shaft. The most common size at both ends of the intermediate shaft is 222.2mm, and the allowable error is ±0.1mm. The two ends are where the bearing is assembled, and its size directly determines the positioning reliability of the shaft in the transmission case. Therefore, the size must be guaranteed during the process. precise. [0003] The existing intermediate shaft processing technology is the process of cutting the intermediate shaft, forging, normalizing, finishing turning, gear making, twisting splines, drilling, heat treatment, straightening and grinding the outer circle, and then finishing the end face , and finally cleaning, fini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14B23P2700/50
Inventor 杨倩张龙
Owner CHONGQING YUQING MACHINERY MFR
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