A wire pulley for polysilicon cutting wire and its preparation process

Abstract

The invention discloses a guide wire wheel for polycrystalline silicon cutting wires. The guide wire wheel comprises a wire wheel body, wherein the wire wheel body is manufactured by carbon fibers; and guide wire groove rings are fixed at the outer periphery of the wire wheel body. The preparation process comprises the steps of: 1) shape cutting; 2) compression molding; 3) accurate cutting; 4) molding of the guide wire groove rings; and 5) balance testing. The guide wire wheel is high in accuracy, low in error, small in weight and high in hardness, and largely prolongs the service life.

Description

technical field [0001] The invention relates to the field of photovoltaics, in particular to a guide wheel for polysilicon cutting wire and a preparation process thereof. Background technique [0002] Polysilicon is an important raw material in the photovoltaic industry, which needs to be cut into specified shapes and sizes when used. Now generally use wire cutting device for its cutting, wherein the cutting wire is guided by the guide wheel, and the quality of the guide wheel determines the quality of the cut product. [0003] The existing guide wheel is made of aluminum material as the wheel body material, and then the outer ring of the wheel body is connected with the guide groove by glue. gram, its mass cannot continue to shrink, and when in use, the centrifugal force is also large, resulting in fuzzy guidance of the cutting wire. Since the speed of the guide wheel generally needs to reach 2800r / min, in the case of fuzzy guidance, great friction will occur. Resulting i...

AI Technical Summary

Problems solved by technology

[0003] The existing guide wheels use aluminum as the material of the wheel body, and then use glue to connect the outer ring of the wheel body with the guide groove. The minimum mass of domestic guide wheels can be 200 grams, and the minimum weight of foreign guide wheels can be 165 gram, its mass cannot continue to shrink, and when in use, the centrifugal force is also large, resulting in fuzzy guidance of the cutting wire. Since the speed of the guide wheel generally needs to reach 2800r / min, in the case of fuzzy guidance, great friction will occur. Resulting in a very short lifespan, generally the normal use period is about 4 hours to 4 days

There are also some made of lipid substances, but their strength is not enough, and they will bounce when used, which is not conducive to cutting

However, there are dozens of guide wheels running at the same time in each wire cutting equipment, the replacement frequency is high, and the labor load is large, which is not conducive to the rapid development of the enterprise.

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