Device and method for polishing inner wall of special-shaped metal tube

Abstract

The invention discloses a device and method for polishing the inner wall of a special-shaped metal pipe, and belongs to the technical field of polishing and grinding the inner wall of precision pipes. Inject the magnetorheological fluid into the gap formed between the special-shaped metal tube and the mandrel, and apply magnetic fields with different strengths in different areas inside the special-shaped metal tube, so that the magnetorheological fluid inside the special-shaped metal tube will flow in the special-shaped metal tube under the action of the magnetic field. The wall forms a polishing film, and by controlling the movement of the magnetorheological fluid in the special-shaped metal tube, the abrasive in the magnetorheological fluid performs an all-round and efficient polishing process on the inner wall of the special-shaped metal tube. Compared with conventional polishing methods, it has high processing efficiency and a small amount of magnetorheological fluid, which can realize the processing purpose of different parts of the inner wall of special-shaped metal tubes with different roughness, and meet individual needs; at the same time, the polishing precision is high, and there is no tool wear and clogging phenomenon , high removal rate and no subsurface damage.

Description

technical field [0001] The invention belongs to the technical field of precision pipe inner wall polishing and grinding, and in particular relates to a polishing device and method for the inner wall of a special-shaped metal pipe. Background technique [0002] Metal pipes are widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. In some fields with high precision requirements, there are high requirements for the surface roughness of the inner wall of metal pipes. The roughness requirements of the inner wall of complex special-shaped metal pipe fittings are relatively high (Ra0.012~Ra0.025), or the roughness requirements of different parts of the inner wall of special-shaped pipe fittings are also different under certain conditions. [0003] At present, the methods that can roughen the interior of metal pipes mainly include: inner coating method, chemical polishing met...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a device and method for polishing the inner wall of a special-shaped metal tube, which has a reasonable structure design and simple operation, and solves the technical problem of polishing the inner wall of a special-shaped metal tube with complex shapes that is difficult to achieve at present.

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