Self-pressurized high-speed polishing method and device for inner surface of hole by means of abrasive particles and magnetic flow

Abstract

The invention provides a self-pressurized high-speed polishing method for the inner surface of a hole by means of abrasive particles and a magnetic flow. According to the method, the abrasive particles are coated with and restrained on the inner surface of the hole of a workpiece by the aid of ferromagnetic particles in a magnetorheological polishing fluid, which flows at a high speed, under the effect of a magnetic field produced by moving magnetic bodies, a flexible polishing abrasive brush flowing at a high speed is formed and reciprocates to rub against the inner surface of the hole of the machined workpiece to remove burrs and reduce the roughness of the inner surface of the hole, and burr removal and deterministic polishing are realized for various types of inner surfaces of holes. The invention further provides a self-pressurized high-speed polishing device for the inner surface of the hole by means of the abrasive particles and the magnetic flow. The device comprises a polishing mechanism, the magnetic bodies, a clamping mechanism, a sliding guide rail and a driving motor, wherein the driving motor drives the magnetic bodies to enable the polishing fluid to reciprocate in the hole at the high speed for polishing. The method and the device can solve problems that special holes are difficult to polish and the polishing efficiency is low, and have the advantages of high precision, high machining efficiency, low damage and low cost.

Description

technical field [0001] The invention relates to ultra-precision machining, in particular to a self-pressurized high-speed abrasive magnetic flow hole inner surface polishing method and device for polishing the inner surface of special holes (irregular special-shaped holes, threaded holes, rifled holes, fine holes, etc.) . Background technique [0002] With the advancement of modern science and technology, various special holes are more and more widely used in aerospace, aviation, automobile, weapons, electrical appliances, chemical industry, hydraulic pressure, medical and other industries, such as the rifling holes of gun barrels and the threaded holes in precision machine tools , fuel nozzles of internal combustion engines, etc., in which the accuracy of the rifling hole of the gun barrel is required to have a deformation of no more than 1 μm and an inner surface roughness of more than 0.2 μm. At present, the processing accuracy and surface quality requirements for these ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a high precision, high processing efficiency, small damage and low cost problem for special holes (irregular special-shaped holes, threaded holes, rifled holes, fine holes, etc.) difficult to polish and low polishing efficiency. Inner surface polishing method of self-pressurized high-speed abrasive magnetic flow hole based on magnetorheological effect

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