Honing magnetorheological polishing method and device

Abstract

The invention relates to the field of polishing equipment and process, in particular to a honing magnetorheological polishing method and device. An electromagnet is positioned in a polishing head; a high gradient magnetic field is formed on the outer surface of the polishing head; magnetorheological polishing liquid flows out from an inner cavity of the polishing head to quickly change as a Bingham medium with bonding plasticity under the effect of the magnetic field; through adjustment of the magnitude of magnetic exciting current, the shearing yield strength of the magnetorheological polishing liquid and the pressure to the surfaces of workpieces under the effect of the magnetic field can be adjusted; the polishing head is driven by a speed adjusting motor to rotate at high speed; the workpieces are driven by a ball screw to perform a linear reciprocating motion; through relative movement of the polishing head and the workpieces, materials on the surfaces of the workpieces are removed; and the magnetorheological polishing liquid flowing through a polishing area is collected by a collecting device for impurity filtration, water feeding and full stirring to continuously participatein the magnetorheological polishing polishing process. The honing magnetorheological polishing method and device are excellent in polishing uniformity and suitable for efficient polishing of the inner walls of nonmagnetic pipe fittings such as stainless steel, ceramic and aluminum alloys.

Description

technical field [0001] The invention relates to the field of polishing equipment and technology, in particular to a method and a device for polishing the inner wall of a non-magnetic pipe fitting by using a magnetorheological polishing liquid. Background technique [0002] With the rapid development of modern manufacturing technology, the processing quality requirements for various mechanical products are getting higher and higher, especially for the smoothness of the inner wall of some small-diameter slender tubes in engineering. Generally, the inner wall of pipe fittings will inevitably produce surface defects such as burrs, microcracks, and wrinkles during the production process, which seriously affects the performance and service life of the pipe fittings. Therefore, it is necessary to increase the process of polishing the inner wall of the pipe fittings to improve the surface quality of the inner wall and eliminate Residual Stress. [0003] Traditional mechanical polis...

AI Technical Summary

Problems solved by technology

[0003] Traditional mechanical polishing is labor-intensive and has low processing efficiency. For slender pipe fittings, limited by the shape of the pipe fittings, it is difficult for ordinary polishing tools to penetrate deep into the pipe fittings for polishing.

The abrasive flow process can be used to smooth the inner wall of the slender pipe fittings. The semi-solid organic polymer material is used as a carrier to suspend abrasive particles with scraping effect in it to form viscoelastic abrasives. The abrasive particles flow under pressure. Fluid medium squeezes and flows through the surface of pipe fittings to achieve material removal on the surface of pipe fittings. However, due to the inherent randomness and variable diversity of the distribution of abrasives in the medium, the processing effect is greatly affected by flow velocity and pressure, and there is a lack of mature theoretical support. The inner surface of the pipe fittings is prone to uneven thickness and uneven surface processing

Chemical polishing is to finish the surface of the workpiece by chemical etching of chemical reagents. The chemical polishing equipment is simple and can handle thin tubes, parts with deep holes and complex shapes. The production efficiency is high, but the service life of the polishing solution is short. , very serious environmental pollution, not suitable for sustainable development

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