Finish turning core expanding die of machine base

Abstract

The invention discloses a finish turning core expanding die of a machine base. The finish turning core expanding die of the machine base comprises a center shaft, wherein a plurality of sliding blocks are arranged on the outer surface of the center shaft, annular springs are arranged on the two sides of the outer surface of each sliding block correspondingly, a plurality of threaded holes are formed in the outer surface of the center shaft, and the inner surfaces of the threaded holes are in threaded connection with set screws. A finish turning die and a workpiece can be quickly fixed on a lathe, the machining benchmark of the machine base can be quickly found, the whole process is efficient and quick, the working efficiency is improved, meanwhile, the quality requirement of a finish turning product of the machine base is met, and the finish turning core expanding die of the machine base can be used for finish turning machining of the machine base clamping workpieces with different sizes and specifications by replacing sliding blocks with different flange outer diameters.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an expanding mandrel for a machine base finish car. Background technique [0002] In the production process of electric locomotive fan motor accessories, the finishing process of the motor frame is a key process, and its machining dimensional accuracy greatly affects the performance of the motor and fan. For the fine turning of the small machine base, the traditional method is to use the three jaws of the lathe chuck to directly tighten the inner hole of the machine base, and then repeatedly adjust the outer circle of the root of the heat sink of the machine base to find the machining reference, and two clamping U-turns are required, so that It is very time-consuming to clamp back and forth, which is not only time-consuming and labor-intensive, but also the three claws tighten one end of the inner hole of the machine base. This series of processing problems plagues the work...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a machine base finishing car expansion mandrel, which can adjust the diameter of the outer circle of the finishing mold to achieve the purpose of tightening the inner hole of the machine base, so as to solve the problem of machine base finishing turning. Clamp adjustment is cumbersome, and at the same time eliminates the hidden danger of deformation in the inner hole of the machine base when the jaws are tightened

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