Ultra-precise curved surface finishing method based on non-Newtonian fluid shear thickening effect

Abstract

The invention discloses an ultra-precise curved surface finishing method based on non-Newtonian fluid shear thickening effect. The method includes: adding abrasive particles or micropowder into non-Newtonian fluid with shear thickening effect to prepare non-Newtonian fluid polishing solution, wherein the non-Newtonian fluid accounts for 50%-90% of the mass of the polishing solution, the abrasive particles or the micropowder account for 10%-50% of the mass of the polishing solution, and the particle size of the abrasive particles or the micropowder ranges from 0.05 micrometer to 50 micrometers. Relative motion is generated between a workpiece and the polishing solution during polishing, shear thickening is generated at a contact portion of the polishing solution and the workpiece under shearing action, viscosity of the polishing solution in the contact area is increased to enhance holding force to the abrasive particles or the micropowder, and removal of workpiece surface materials is achieved under the micro cutting or chemical mechanical action of the adding abrasive particles or micropowder with polishing effect in the polishing solution on the workpiece, so that polishing of the workpiece surface is achieved. The ultra-precise curved surface finishing method based on the non-Newtonian fluid shear thickening effect can achieve efficient and high-quality polishing to various curved surfaces, in particular to complex curved surfaces and has great economic and social benefits.

Description

technical field [0001] The invention belongs to precision and ultra-precision machining technology, and relates to an efficient and high-quality polishing method based on the shear thickening effect of non-Newtonian fluid, in particular to an efficient and ultra-precision polishing method for various complex curved surfaces such as aspherical curved surfaces and special-shaped curved surfaces. Background technique [0002] Complex surfaces have become an important working surface for many parts in aerospace, astronomy, auto parts, molds, and biomedical implants. Aspherical optical parts can correct a variety of aberrations well, improve the ability of instrument identification, and simplify the structure of the instrument; complex curved mirrors can effectively reduce the number of reflections and power loss, and improve accuracy and stability; the engine cylinder with complex curved surfaces improves its work efficiency. At the same time, with the increasingly complex, hig...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the prior art, such as complex processing equipment, high cost, low processing efficiency, poor processing consistency, and difficulty in meeting the high-efficiency and high-quality processing requirements of various curved surfaces, especially complex and special-shaped curved surfaces, the present invention proposes a high-efficiency, low-cost A cost-effective method for ultra-precision surface polishing based on the shear thickening effect of non-Newtonian fluids

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