Device for grinding and processing polycrystalline silicon

Abstract

The invention provides a device for grinding and processing polycrystalline silicon. According to the device for grinding and processing polycrystalline silicon, a lifting motor is adopted to controla wire winder and adjust rising and falling of one end of a balancing frame, and thus synchronous lifting fine adjustment of a grinding tool is controlled. Meanwhile, multiple grinding wheels are adopted; and the multiple grinding wheels are in contact with polycrystalline silicon in left-right alternating and progressive order from edges of two sides of polycrystalline silicon to the center, andthe surface of polycrystalline silicon is ground. The device for grinding and processing polycrystalline silicon has the advantages that load is adjustable, surface grinding thickness is uniform, traces that edge lines are ground by the grinding wheels are reduced, and the surface smoothness of edge leather material, head material and tail material is increased.

Description

technical field [0001] The invention belongs to the production field of crystalline silicon solar cells, in particular to a polysilicon grinding treatment device. Background technique [0002] The growth of polysilicon crystals is an important part of the production of crystalline silicon solar cells. Most of the silicon materials used for the crystal growth are scraps, head and tails of crystalline silicon ingots. In order to reduce scraps, scraps and The influence of surface impurities of tailings on the subsequent processing of crystalline silicon ingots requires grinding of the surface of recycled materials. [0003] In the prior art, the patent No. 2017212130908 is a patent for a differential grinding treatment device for polysilicon edge and tail materials, which discloses a constant load grinding method, and uses a progressive grinding wheel combination method to grind the edge and tail materials . [0004] With the constant load grinding method, the pressure of the...

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Problems solved by technology

[0005] In addition, the grinding wheel is gradually polished from one side to the other. Due to the rough surface of the polysilicon, the unpolished side will slightly tilt up a slope, and the grinding depth remains unchanged under constant load, resulting in the edge of the grinding wheel Grinding into a step shape, which will cause the edge line of the grinding wheel to be more obvious, and affect the smoothness of the surface of the edge and tail, reducing the quality and yield of the product

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