Upright magnetorheological polishing device and method

Abstract

The invention relates to an upright magnetorheological polishing device. The device comprises a polishing mechanism and a clamping mechanism; the polishing mechanism comprises a magnetic frame, a coiland a vertically arranged liquid storage pipe; the inner hole of the liquid storage pipe fits a workpiece and contains magnetorheological liquid; the workpiece is clamped by the clamping mechanism tofit the position of the liquid storage pipe; a magnetic field is formed in the inner hole of the liquid storage pipe by the coil, and a flexible polishing film is formed by the magnetorheological liquid; the workpiece and the polishing film move relatively in the vertical direction and rotate relatively along the axis of the workpiece. According to the upright magnetorheological polishing deviceand an upright magnetorheological polishing method, a rheologic effect is generated by the magnetorheological liquid to shear the polishing film with higher yield stress and apparent viscosity and viscoplasticity, the relative movement of the magnetorheological liquid and a to-be-processed surface is utilized to perform material removing on the surface, the polishing process is not limited by theshape of the surface of the workpiece, the polishing efficiency is high, and damage is not generated. The device has a simple structure and is easy to control, and workpieces with different characteristics and demands can be polished.

Description

technical field [0001] The invention relates to the field of polishing, in particular to a vertical magnetorheological polishing device. [0002] The invention also relates to a vertical magnetorheological polishing method. Background technique [0003] Titanium alloy tubes have the characteristics of high pressure resistance and corrosion resistance, and are widely used in aerospace, medical, military and other fields. In foreign countries, due to the mature development and supporting application technology of titanium alloy pipes, the development and supporting application technologies of titanium alloy pipes are mature. Therefore, titanium alloy pipes have been used in aviation and aerospace fields in developed countries. Titanium alloy tubes are widely used in bleed air lines, hydraulic lines, and fuel lines of advanced aircraft. Due to the limitation of the use environment, the roughness of the pipe fittings surface is required to be high, mainly to ensure the sealing...

AI Technical Summary

Problems solved by technology

Due to the limitation of the use environment, the roughness of the pipe fittings surface is required to be high, mainly to ensure the sealing performance of the pipe fittings at the joints, to prevent the leakage of liquid or gas, which will cause the deterioration of the use environment and cause unnecessary pollution and corrosion. Sexual damage and reduction in service life of pipe fittings

For titanium alloy pipes, especially pipe fittings with small diameters and pipe fittings with surface threads, the traditional polishing method will cause plastic deformation of the pipe fittings or fail to penetrate deep into the thread

Titanium alloy tubes are mainly processed by press hot extrusion and skew rolling perforation. The processed titanium alloy tubes are pickled to remove some surface defects. It is more difficult to comprehensively treat the outer surface of the tube, and the scratches, pits, micro-cracks, and burrs caused by the process will seriously affect the performance in practice

[0004] Titanium alloy is a typical difficult-to-machine material, with high toughness and specific strength, large elastic deformation, and high chemical activity. The traditional grinding method will cause surface morphology, surface Tissue, surface hardness, etc. will undergo great changes, and may even cause thermal damage such as surface burns

Among the existing surface treatment methods, electrochemical finishing uses the principle of electrochemical dissolution of metal anodes, so that the passivation film formed on the surface is leveled under the action of an external flow field, and the processing is not affected by the material and surface of the workpiece. Hardness is restricted, but there are many factors that affect the leveling effect of electrochemical finishing, and as the finishing process progresses, the leveling effect decreases; magnetic grinding uses sintered magnetic abrasives to form a magnetic brush under the action of a magnetic field. Using a flexible magnetic brush to process the surface of the workpiece, magnetic grinding has good adaptability and is widely used in the surface finishing of plane, round and complex curved surfaces, but there are problems of low grinding efficiency, long period of abrasive grain production, and poor economy. shortcoming

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