Variable stiffness conical helical spring array polishing plate

Abstract

The invention discloses a variable stiffness conical helical spring array polishing plate, which comprises a polishing plate body, a conical helical spring array, a polishing pad and hemispherical brackets, wherein a polishing cavity is formed in the upper part of the polishing plate body, and the bottom of the polishing plate body is fixedly connected with a rotating workbench driven by a motor; the conical helical spring array is arranged on the inner bottom surface of the polishing cavity of the polishing plate body; the polishing pad for abrasive particle supporting and waterproof protection is attached to the upper surface of the conical helical spring array; the conical helical spring array comprises a plurality of mutually independent conical helical springs, and each conical helical spring corresponds to one hemispherical bracket; the upper cover of the polishing pad is covered with an abrasive particle layer filled with a polishing solution for lubrication and radiation. The variable stiffness conical helical spring array polishing plate has the beneficial effects that the polishing plate is compact in structure, the problem of incapability of a conventional polishing plate in machining an irregular curved surface is effectively solved, and the machining efficiency is improved; the variable stiffness conical springs are additionally arranged at the bottom of the polishing plate, so that the polishing plate has high adaptability when contacting a curved surface.

Description

technical field [0001] The invention relates to the technical field of ultra-precision machining of artificial joints, more specifically, a novel polishing disc for efficient polishing of free-form surfaces of cobalt-based alloy artificial joints is invented. Background technique [0002] As an important part of biological materials, metal materials for artificial joints have made great progress in the past 20 years. Artificial joints are implanted prostheses made by simulating human joints to replace diseased or damaged joints and restore their functions. At present, hip and knee replacements are mainly used. Medical cobalt-based alloy has good corrosion resistance, wear resistance and thermal fatigue resistance, high thermal conductivity, low thermal expansion coefficient, Young's modulus does not change with its strength, and good biocompatibility, so it is Widely used in the field of artificial joints. The ultra-smooth cobalt-based alloy surface will make artificial jo...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing polishing discs use a rigid disc at the bottom to support the abrasive grains, so this type of polishing disc can only process flat workpieces, so it is difficult to polish the free-form surface of cobalt-based alloy artificial joints

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