Ultralow temperature polishing machine

Abstract

The invention provides an ultralow temperature polishing machine which comprises a metal shell, an electromotor, a polishing disk with a taper sleeve, a polishing pad, a test sample fixing device and a top cover with a thermal insulating layer; the ultralow temperature polishing machine is characterized in that the ultralow temperature polishing machine is additionally provided with a draught fan, an electric heater, a temperature sensor, a liquid level sensor and a liquid nitrogen metal container with the thermal insulating layer, wherein the liquid nitrogen metal container is arranged on one side wall of the metal shell; the liquid level sensor is arranged inside the liquid nitrogen metal container; the temperature sensor and the electric heater are arranged on the side wall of the metal shell which is arranged in a working area; a window is arranged on the side wall of the metal shell in the working area which is close to the liquid nitrogen metal container; another window which corresponds to the window on the side wall of the metal shell is also arranged on the thermal insulating layer of the liquid nitrogen metal container; the draught fan is arranged on the outer wall of the liquid nitrogen metal container in space formed by the two windows; and a netted protective guard is arranged at the periphery of the draught fan. The ultralow temperature polishing machine has the advantages that the operation is safe, the polishing degree of materials is high, meanwhile, the scratch resistance capacity of the surface of the materials is increased and the subsurface damage is reduced.

Description

technical field [0001] The invention provides an ultra-low temperature polishing machine, which belongs to the technical field of polishing equipment. Background technique [0002] Mechanical removal is a traditional polishing method, which relies on direct contact and friction between polishing particles and the processed surface to obtain an ultra-smooth surface. The mechanical polishing method has a high removal rate and can also obtain sub-nanometer surface roughness. However, due to direct contact, it is easy to cause scratches and internal stress on the surface, and it is difficult to avoid processing deterioration and sub-surface damage. On this basis, a non-abrasive polishing method was developed. The non-abrasive polishing method uses condensed ice to polish. Since ice must be formed below 0°C, non-abrasive polishing is also called low-temperature polishing. Non-abrasive polishing is a great innovation, which breaks through the shackles of traditional polishing or...

AI Technical Summary

Problems solved by technology

The mechanical polishing method has a high removal rate and can also obtain sub-nanometer surface roughness, but due to direct contact, it is easy to cause scratches and internal stress on the surface, and it is difficult to avoid processing deterioration and sub-surface damage

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