Super-mirror polishing method of metal plate

Abstract

The invention discloses a super-mirror polishing method of a metal plate. The method comprises the following steps: (1) the metal plate is grinded by a grinding tool, or is coldly rolled by a finishing mill to obtain a straight board shape, wherein the reduction rate of the cold rolling is 3-30%; (2) a water abrasive paper is bonded on a turntable of a metallographic polisher for polishing the metal plate processed in the step (1); and (3) the surface of the metal plate polished in the step (2) is polished by a polisher with a sponge disc under the speed of 1500-2500 r/min until the roughness Ra is smaller than 10 nm; and grinding paste with the particle size of W0.5-W5.0 is coated on the sponge disc. The method has the advantages of short flow, high efficiency, flexible operation and wide application range.

Description

technical field [0001] The invention belongs to the field of metal processing, and in particular relates to a super-mirror polishing method for a metal plate. Background technique [0002] With the innovation of mechanical processing technology and the development of emerging material technology, there is an increasing demand for mirror polishing of metal surfaces. How to polish metal surfaces efficiently, with high quality and without pollution and obtain super mirror polishing effects has become a A research focus direction. At present, the polishing technology of metal surface mainly includes chemical polishing, electrolytic polishing, mechanical polishing and their composite polishing methods. Chemical polishing is a polishing process completed by chemical etching. It is characterized in that it does not need DC power supply and conductive hangers, and can polish workpieces with complex shapes and various sizes, but the service life of the solution is short, and it is d...

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Problems solved by technology

Chemical polishing is a polishing process completed by chemical etching. It is characterized in that it does not need DC power supply and conductive hangers, and can polish workpieces with complex shapes and various sizes, but the service life of the solution is short, and it is difficult to ensure the concentration of the solution; electrolytic polishing is The process of putting the workpiece into a specific solution for anodic electrolysis to smooth the surface of the workpiece and produce a metallic luster, but it pollutes the environment and cannot remove defects such as macroscopic scratches and pitting on the surface of the workpiece; mechanical polishing is through grinding Processing to obtain a smooth surface. Traditional surface treatment methods for metal materials include planing, milling, EDM, wire cutting, etc. Usually, the surface roughness Ra value obtained by these processing technologies is greater than 10 μm, and high-precision grinding machines are used. The surface roughness Ra value of the electric machining machine tool is 0.32-1.6 μm, and other more advanced equipment processing makes the Ra value better than 0.1 μm, but its machine tool equipment is expensive and the processing time will be prolonged; and special polishing treatment methods, such as: apply No. 200520200625.9 is a hydraulic polishing machine for stainless steel pots, and the application No. 200920231300.5 is a high-precision stainless steel polishing device. Both of them require certain equipment support, and they are not suitable for processing the surface of large and complex parts, and it is difficult to achieve a mirror effect. In addition, there are compound processing methods of these several technologies, for example: the application number is 201210181335.9, an ultra-precision compound polishing method, which combines three polishing processes of chemistry, electrolysis and machinery, but it has complex processes, long process and low efficiency , high cost and other disadvantages

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