Machining process for guaranteeing precision of external circle of shaft sleeve

Abstract

The invention relates to the technical field of a shaft sleeve machining process, in particular to a machining process for guaranteeing the precision of an external circle of a shaft sleeve. The machining process comprises the following steps of: casting a steel piece blank; roughly milling each mounting surface, each positioning surface and each circular arc by using a planer type milling machine; roughly turning a front shaft neck, an inner hole and a back-end inner hole by using a vertical lathe; carrying out semi-precisely turning on the front shaft neck and precisely turning the inner hole and the back-end inner hole by using a vertical lathe face; by utilizing a pentahedron machining center, precisely milling and drilling each mounting surface, each positioning surface and holes and screw holes on faces, and precisely milling an circular-arc face; utilizing a rocker arm drill and a horizontal milling machine to ream a mounting hole circular arc and a plane lug boss; and utilizing an external circle milling bed to mill the external circle of the front end shaft neck. The machining process for guaranteeing the precision of the external circle of the shaft sleeve, disclosed by the invention, effectively ensures that the machining precision of the shaft neck is effectively ensured and the deformation amount of the shaft neck is controlled within 0.005 mm; and the machining process is suitable for machining parts with the similar structure, so that the machining process is easy to use and popularize.

Description

technical field [0001] The invention relates to the technical field of a processing method for a shaft sleeve, in particular to a processing method for ensuring the precision of the outer circle of a shaft sleeve. Background technique [0002] The shaft sleeve, also known as the hollow shaft sleeve, is a safety-critical part of the running part of a diesel locomotive. Bearings and axle transmission gears are installed on the outer journal of the shaft sleeve. The shaft sleeve is cast steel blank, and the material is ZG40Cr. The shaft sleeve has a special structural shape, one end is a semi-open cylinder and a parallel fork plane structure, and the other end is a hollow thin-walled shaft sleeve. The overall structural rigidity of the part is poor, and the shape and position accuracy, size and size of the outer circle of the shaft sleeve are relatively high, which is the key quality characteristic of the part. Specific requirements: the outer diameter of the journal is ￠380 ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing shaft sleeve processing method is difficult to ensure the processing quality of the shaft sleeve, which leads to the difference in journal size, shape and position accuracy and center distance, and affects the normal use of parts, the present invention provides a method to ensure the accuracy of the outer circle of the shaft sleeve. processing methods