Ingot tilting fixture for turning over polycrystalline silicon ingot

Abstract

An ingot tilting fixture for turning over a polycrystalline silicon ingot comprises a balance hanger rod, side clamping arms, side pressure adjusting screws, side clamping blocks, clamping block rotating pins, arm rotating pins, top loss prevention blocks and a strap. Rotating notches matched with the arm rotating pins are formed in the lower end faces of two ends of the balance hanger rod, the side clamping arms are sleeved at the two ends of the balance hanger rod, the arm rotating pins are mounted on the side clamping arms and correspond to the rotating notches of the balance hanger rod, the side pressure adjusting screws are screwed on the upper end faces of the side clamping arms, the lower ends of the side pressure adjusting screws correspond to the upper end of the balance hanger rod, the side clamping blocks are mounted on the side clamping arms through the clamping block rotating pins and can freely rotate relative to the side clamping arms, the top loss prevention blocks are mounted on the balance hanger rod and correspond to the top of the polycrystalline silicon ingot, and the strap is fixed onto the balance hanger rod. An advanced silicon ingot square-cutting process can be smoothly implemented, internal hidden cracks caused by internal stress imbalance of tilting and square-cutting of the polycrystalline silicon ingot are reduced, cracking of the ingot is avoided, and the yield of polycrystalline silicon rods is improved.

Description

technical field [0001] The invention relates to a processing technology for squaring polycrystalline silicon ingots, in particular to an ingot turning fixture in the squaring process. Background technique [0002] Solar polysilicon wafers are the most important raw materials for solar cells. Polycrystalline silicon rods are obtained by cutting polycrystalline silicon ingots into squares, and then polycrystalline silicon wafers can be processed by performing multi-wire cutting on polycrystalline silicon rods. During the melting and casting process of polycrystalline silicon ingots, since most of the impurities float on the silicon liquid, according to the inherent law of silicon ingot crystallization and impurity removal, the top of polycrystalline silicon ingots has the highest impurity content, so it has high hardness and high brittleness. [0003] When cutting polysilicon ingots into polysilicon rods, at present, the bottom of the polysilicon ingot is first glued to the c...

AI Technical Summary

Problems solved by technology

However, it is very difficult to turn the polycrystalline silicon ingot 180 degrees, because the silicon ingot is heavy and brittle, and the process of clamping, lifting, and turning may damage the silicon ingot, especially if it slips during the clamping and lifting process, the consequences unimaginable

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