Manufacture method for central transmission rod with wall margin and dynamic unbalance value controlled

Abstract

The invention belongs to the technical field of aero-engine machining, and particularly relates to a manufacture method for a central transmission rod with a wall margin and dynamic unbalance value controlled. The manufacture method for the central transmission rod with the wall margin and dynamic unbalance value controlled comprises the steps that before heat treatment, allowances of processes for machining an inner hole and an outer diameter are adjusted to ensure that deformation caused by the heat treatment can be eliminated after the heat treatment; in the process of the heat treatment, the heat treatment is carried out by hoisting to reduce deformation of the heat treatment; pre-balance is added before dynamic balance, a dynamic unbalance value is not removed during the pre-balance,and only an unbalanced actual value and position of a part are recorded; and after the pre-balance, a flat milling direction is determined by considering a previously marked position in a flat millingprocess, a deformation rule of the part is found out, more operable space for the final dynamic balance de-weight is reserved, and preconditions for ensuring a dynamic balance value of the part are provided. According to the manufacture method for the central transmission rod with the wall margin and dynamic unbalance value controlled, the deformation of the part during the heat treatment can beeffectively reduced, and direct qualification without the de-weight is achieved; and an accurate machining method and parameter analysis are obtained, and practical application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and specifically relates to a method for manufacturing a central transmission rod to control wall thickness difference and dynamic unbalance. , The processing of the inner hole, the control of the wall thickness difference of the parts and the manufacture of the dynamic unbalance. Background technique [0002] At present, for the processing of central transmission rod parts, the inner hole processing of the parts and most of the machining allowance of the outer diameter of the parts are completed before heat treatment. During the whole processing process, the deformation control of the parts is not ideal. [0003] The processing procedure of the existing technology is: incoming material - blanking - punching tip hole - rough turning outer diameter - quenching and tempering - rough turning outer diameter - punching tip hole - machining inner hole - machining outer diameter (standard)...

AI Technical Summary

Problems solved by technology

[0004] Before the heat treatment of the part, the inner hole is processed by a more flexible gun drill. There is a processing resistance when processing the inner hole, and there is a phenomenon of uneven wall thickness difference in the inner hole, and the size of the inner hole has reached the final; At this time, the parts did not adopt tooling to control the deformation, but placed the parts freely in the heat treatment equipment for heat treatment, which caused a large deformation of the parts. The amount of heat treatment can not offset the amount of deformation. The final required wall thickness of the part is 0.05mm, the dynamic balance is 19g.mm, and the precision is very high. The weight removal belt required by the part itself cannot meet the weight removal requirements.

In summary, the emergence of the above problems will eventually lead to the unqualified wall thickness difference and dynamic unbalance of the parts

Images