Tool for turning excircle of transmission shaft universal joint fork and method for positioning and centering universal joint fork

Abstract

The invention discloses a tool for turning the excircle of a transmission shaft universal joint fork. The tool comprises a connecting flange and a tailstock center which are arranged on an external machine tool, wherein the connecting flange is connected with a V-shaped block; a V-shaped groove in press fit with the two lug parts of the universal joint fork is formed on the V-shaped block; one end of the tailstock center is provided with a centering part matched with an inner nest of the universal joint fork; and a press center matched with a central nest of the universal joint fork is convexly arranged in the center of the centering part. The centering part is matched with the inner nest, so that the inner nest with relatively high blank quality can be used as a centering standard to achieve a better centering effect; and the press center is matched with the central nest of the universal joint fork, so that the universal joint fork can be firmly pressed on the V-shaped block through the press center. The invention also discloses a method for positioning and centering the universal joint fork by using the tool for turning the excircle of the transmission shaft universal joint fork. The better centering effect can be achieved; meanwhile, press operation is simple and convenient, and work efficiency is improved.

Description

technical field [0001] The invention relates to a transmission shaft universal joint forklift outer circle tooling. Background technique [0002] The universal joint yoke of the transmission shaft includes two ears and an outer circle part, and one end of the two ears is respectively connected with the outer circle part through the parting surface. central fossa. The existing drive shaft universal joint forklift outer circle tooling is clamped, positioned and centered with a double-slanted column back-pull chuck, and the jaws are clamped at the parting surface. This method of positioning and centering has the following defects: it is difficult to control the error at the parting surface during the forging process of the blank, and there will be problems such as burrs and unevenness, which will easily lead to incorrect clamping of the blank, resulting in the occurrence of parts Uneven wall thickness of the outer circle after processing or flying out during part processing. ...

AI Technical Summary

Problems solved by technology

This method of positioning and centering has the following defects: it is difficult to control the error at the parting surface during the blank forging process, and there will be problems such as burrs and unevenness, which will easily lead to incorrect clamping of the blank, resulting in the occurrence of parts Uneven wall thickness of the outer circle after processing or flying out during part processing

In addition, the subsequent process of turning the outer circle is to use the outer circle for positioning, which may easily cause the position of the boring ear hole to fail to meet the product requirements, and the car is prone to deviation when turning the spring groove

In a word, in the process of machining the outer circle of the universal joint fork of the transmission shaft, the error of the positioning rough reference is too large, which causes the disadvantages of uneven wall thickness of the outer circle of the parts and parts flying out; The accuracy of the subsequent process is reduced

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