A magnetorheological polishing method and device for the inner wall of a titanium alloy tube

Abstract

The invention provides a titanium alloy pipe inner wall magneto-rheological polishing method and device. Magneto-rheological liquid is pumped into a polishing head inner cavity along the inner surfaceof a transmission rod under the effect of a creepage pump, and flows over through rectangular holes around the middle of a polishing head, the liquid flows to the polishing area from the left side and the right side, under the effect of a magnetic field, the apparent viscosity and the shear yield stress of the magneto-rheological liquid are rapidly increased, a Bingham medium with certain viscousplasticity is formed, along with relative motion of the polishing head and the pipe wall, the Bingham medium carries out shear removal on the pipe wall material, the magneto-rheological liquid obtained after polishing is collected through magneto-rheological liquid collecting mechanisms on the two sides of a pipe fitting, through filtering and stirring, the polishing process is continuously carried out, and circular utilization of the magneto-rheological liquid is achieved; in the magneto-rheological liquid circulation process, heat generated in the polishing area is brought away. The inner wall of the titanium alloy pipe can be automatically polished, the beneficial effects of being easy to control, good in polishing uniformity, high in work efficiency and the like are achieved, and themethod and device are particularly suitable for polishing treatment of the inner wall surface of the fine and long titanium alloy pipe.

Description

technical field [0001] The invention relates to polishing equipment and technology, in particular to a method and device for polishing the inner wall of a titanium alloy tube by using magnetorheological fluid. Background technique [0002] Titanium alloy tubes have the characteristics of high pressure resistance and corrosion resistance, and are widely used in aerospace, medical, military and other fields. Restricted by the use environment, the surface roughness requirements inside the pipe fittings are very high. On the one hand, it is to ensure the smooth transportation of gas or liquid in the pipe, to avoid the surge phenomenon caused by the uneven inner surface of the pipe, and on the other hand, to avoid the surface defects caused by the pipe wall. pollution and corrosion, and improve the service life of pipe fittings. Titanium alloy pipes are mainly processed by two processes: hot extrusion by press and cross-rolling perforation. Affected by the processing technology,...

AI Technical Summary

Problems solved by technology

In the prior art, electrochemical polishing is to use electrochemical reaction to remove the microscopic unevenness left by cutting process, which is not affected by the material and surface hardness of the workpiece, but there are many factors affecting the polishing effect, and the processing shows a certain degree of instability.

Magnetic grinding process uses magnetic grinding brushes formed by magnetic abrasives under the action of a magnetic field to polish the surface of the workpiece. It is widely used in the finishing of planes, inner and outer circular surfaces, and complex mold cavities. However, there are low grinding efficiency and abrasive grains. Defects of high production cost and low lifespan

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