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

Abstract

The invention provides a method and device for magnetorheological polishing of the inner wall of a titanium alloy tube. The magnetorheological fluid is pumped into the inner cavity of the polishing head along the inner surface of the transmission rod under the action of a peristaltic pump, and overflows through the rectangular hole around the middle part of the polishing head, respectively. Flows from the left and right sides to the polishing area. Under the action of the magnetic field, the apparent viscosity and shear yield stress of the magnetorheological fluid increase rapidly, forming a Bingham medium with a certain viscoplasticity. With the relative movement of the polishing head and the tube wall, the Bingham medium The medium shears and removes the pipe wall material; the magnetorheological fluid that participates in polishing is collected through the magnetorheological fluid collection mechanisms on both sides of the pipe, and continues to participate in the polishing process after being filtered and stirred, realizing the magnetorheological fluid Recycling; the heat generated in the polishing area is taken away during the circulation of the magnetorheological fluid. The invention can automatically polish the inner wall of titanium alloy pipes, and has the advantages of simple control, good polishing uniformity, and high work efficiency. It is especially suitable for polishing the inner wall surface of slender titanium alloy pipes.

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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