Inner surface polishing and derusting tool of hollow axle of CRH train

Abstract

The invention discloses an inner surface polishing and derusting tool of a hollow axle of a CRH train, and belongs to the field of polishing devices for the inner surfaces of hollow axles of CRH trains. The tool comprises a lengthened rod, a polishing head base, an end nut, a polishing piece assembly and an outer-layer polishing piece. The outer-layer polishing piece and the polishing piece assembly of the polishing and derusting tool both adopt low-cost industrial scouring pads; the surface hardness satisfies the inner diameter cleaning and derusting demands of an axle hollow cylinder; the inner diameter of the hollow axle cannot be scratched; and the advantages of convenience to tailor, manufacture and replace are achieved; the polishing head base, the end nut and the polishing piece assembly form a polishing end; the outer-layer polishing piece is wound at the external of the polishing end to increase the outer diameter; a certain pressure can be applied to the inner side wall of the axle hollow cylinder to increase the slide friction force in cleaning and derusting; a butt joint base is used for coaxially and fixedly connecting the tool with an electric portable drill; and thetool is synchronously rotated along with the electric portable drill, so that the derusting operation on the inner side of the axle hollow cylinder is simple, convenient, labor-saved and efficient.

Description

technical field [0001] The invention belongs to the field of a grinding device for the inner surface of a hollow axle used in an EMU train, and in particular relates to a tool for grinding and derusting the inner surface of a hollow axle of an EMU. Background technique [0002] The axle of the EMU train is a hollow tube structure with a length of more than 2 meters. The size of the central hole used for the ultrasonic flaw detection of the axle is mostly Φ30, and also Φ65. The design parameters require that the inner diameter and side wall of the hollow shaft have a high degree of smoothness. [0003] However, the axle is prone to rust during transportation, storage and use. If the inner wall of the center hole is not derusted, the result of the ultrasonic inspection with rust detection will be unqualified. [0004] At present, there is no special tool for derusting the inner wall of the axle center hole with a depth of Φ30 or Φ65 and more than 1000mm. Contents of the inve...

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Problems solved by technology

[0005] In order to solve the current technical problem of lack of tools specially used for derusting the inner wall of the axle center hole of the Φ30 or Φ65 EMU train, the invention provides a grinding and derusting tool for the inner surface of the hollow axle of the EMU

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