Internal expanding type centering fixture for turning large-scale sleeve parts

Abstract

The invention discloses an internal expanding type centering fixture for large-scale sleeve parts. The internal expanding type centering fixture comprises a chuck fixture and a tail shaft base fixture which have a same shaft axis, wherein the chuck fixture comprises a fixture body, a cone body, a thread bushing and a spring base; the tail shaft base fixture comprises an elastic body, a cone body,a tail shaft, an expanding linking sleeve and an angular contact ball bearing; and the cone body is axially tensioned through bolts mounted on the fixture body or elastic body and the thread bushing on the cone body, so as to expand an elastic part of the fixture body or elastic body along the radial direction and tightly expand a workpiece. The internal expanding type centering fixture is suitable for processing the sleeve parts on a horizontal lathe. By once clamping and positioning the sleeve parts, the purpose of processing an external circle and two end faces of a cylinder jacket of a marine diesel can be realized. The internal expanding type centering fixture is characterized by compact structure, high rotating speed, high axiality, convenience in use and assembly, and the like. Theworkpiece is prevented from being repeatedly mounted on the lathe, so that the workpiece is processed more smoothly.

Description

technical field [0001] The invention relates to the field of machining, in particular to an internal expansion centering fixture suitable for clamping and overall processing of cylinder liners of marine low-speed diesel engines. Background technique [0002] In the machining industry, it is often encountered that the workpiece cannot be processed as a whole due to the clamping during lathe processing. If a small part is turned around, it is nothing more than recalibration, but if it is a large part, the turnaround involves not only the part resetting Calibration, but also need to cooperate with the driver to get on the car and adjust the related fixtures. Taking the machining of the outer circle and end face of the cylinder liner of a marine low-speed diesel engine as an example, the conventional method is: after the inner hole of the cylinder liner is bored, the cover is hoisted on both ends of the cylinder liner by the crane, and then the cylinder is lifted by the crane. ...

AI Technical Summary

Problems solved by technology

Therefore, this is time-consuming and labor-intensive, especially when the processing tasks are relatively busy; on the other hand, after many times of getting on and off the car, the processing accuracy of the workpiece is difficult to be guaranteed

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