Method for grinding four sides and four corners of polycrystalline silicon

Abstract

The invention provides a method for grinding four sides and four corners of polycrystalline silicon, which mainly comprises the following steps: oppositely arranging a pair of poculiform sand wheels along a transverse axis to ensure that an outer ring grinding space and an inner ring adjusting space are formed between the two poculiform sand wheels; when the two poculiform sand wheels rotate around the transverse axis, conveying the polycrystalline silicon to pass through the outer ring grinding space for double-side or double-corner grinding; and when the polycrystalline silicon enters the inner ring adjusting space, rotating the polycrystalline silicon around a longitudinal axis thereof so as to change to another side to be ground or another corner to be ground, and conveying the polycrystalline silicon out of the inner ring adjusting space to ensure that the polycrystalline silicon is subjected to the other double-side or double-corner grinding when passing through the outer ring grinding space. Therefore, a grinding process in the prior art is simplified, the accurate grinding size of the polycrystalline silicon is ensured, and the work efficiency and the quality of the polycrystalline silicon are improved.

Description

technical field [0001] The invention relates to a silicon material grinding technology, in particular to a grinding method for four sides and four corners of polysilicon. Background technique [0002] With the depletion of non-renewable energy, the development of renewable energy is gradually being valued by people. Solar energy, as an unlimited energy and clean energy, naturally becomes the top priority in the field of new energy. For this reason, people have invested a lot in this field. Human and material resources are used for research and development, and at the same time, it promotes the development of related industries, for example, the production and processing of silicon materials as raw materials for solar cells. [0003] A solar cell is composed of many solar silicon wafers bonded to a metal plate coated with an anti-corrosion conductive layer with conductive adhesive, and directly converts light energy into electrical energy through the photoelectric effect or p...

AI Technical Summary

Problems solved by technology

[0005] Since the four sides and four corners of the polycrystalline silicon rod need to be ground, in the existing processing technology, the usual practice is to place the polycrystalline silicon rod between two relatively parallel grinding wheels for double-sided grinding. Grinding, because this method can only grind two sides of the polycrystalline silicon rod at a time, if it is ground on all four sides and four corners, it will need four operations, which is not only time-consuming and labor-intensive, but also prone to damage due to frequent operations. The precise size of the polysilicon rod cannot be guaranteed, which will affect the quality of the polysilicon rod

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