Turning method of outer star wheel with closed end of telescopic constant velocity universal joint

Abstract

The invention belongs to the field of machining and turning and discloses a turning method of a tail end sealed type besides-star wheel of a telescopic constant-velocity universal joint. The method includes the following steps that firstly, an inner hole serves as a clamping face by means of a jaw, the bottom of the inner hole serves as a positioning face, the end of a shaft is fixed through an apex, and the outer surface of the shaft is subjected to rough turning; secondly, the surface, subjected to rough turning, of the shaft serves as a clamping face, a middle stair face between the shaft and a blind hole serves as a positioning face, and the outer surface of the blind hole and the inner hole are subjected to finish turning; thirdly, the inner hole subjected to finish turning serves as a clamping face, the outer surface of the blind hole serves as a positioning clamping workpiece, and the outer surface of the shaft, the end face of the shaft and a center hole are subjected to finish turning. The full numerical control lathe machining technology is adopted, devices for milling planes and drilling center holes are omitted, and the problems that due to unstable factors of the plane milling and center hole drilling procedures, product quality is low and blades are excessively abraded are completely solved.

Description

technical field [0001] The invention belongs to the field of mechanical processing and turning processing technology, and in particular relates to a turning processing method of a telescopic constant velocity universal joint end-closed outer star wheel. Background technique [0002] The constant velocity universal joint is a key component of the car, and it is a universal joint in which the output shaft and the input shaft transmit motion at an instantaneous angular velocity ratio equal to 1. Constant velocity universal joints can be divided into central fixed type and telescopic type according to the working performance, and can be divided into end-closed type, bushing type, flange type, wheel type, etc. according to the installation form and shape in the car. Among them, the VL type belongs to the telescopic and flange type constant velocity universal joint, which is widely used because of its advantages of simple structure, small size, light weight, long life and high str...

AI Technical Summary

Problems solved by technology

The disadvantage of this processing method lies in the process of milling the plane and drilling the center hole. First of all, due to the different wear of the center drill and the blade in the combined tool during processing, the depth of the center hole fluctuates greatly, and the size is difficult to control. Frequent adjustments are required. Second, due to the use of a single movable V-shaped block to clamp the outer circle of the shank, and the clamping and positioning method of pressing the middle step surface, the clamping consistency is poor, causing the center hole to deviate, which affects the uneven machining allowance of the subsequent process. There may even be a phenomenon that the car will not come out, and seriously affect the life of the blade. Finally, among the three processes, the first two processes use the blank surface for clamping and positioning, which violates the selection principle of the lathe processing benchmark, and the product quality fluctuates greatly. , especially the shape and position tolerances such as runout are out of tolerance

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