A special positioning fixture for assembling sapphire crystal rods

Abstract

The invention provides a special positioning fixture for assembling a sapphire crystalbar, which comprises a grip, a screw rod, a positioning apex, a bracket, a platform, an axial positioning base and a crystalbar excircle radial positioning angle plate, wherein the crystalbar excircle radial positioning angle plate implements positioning connection by inserting two positioning pins into two positioning holes in the axial positioning base. The invention has the characteristic of high crystalbar assembling coaxiality and the like, can reduce the required reserved machining allowance to ensure the machining accuracy, and can obviously enhance the subsequent machining efficiency.

Description

(1) Technical field [0001] The invention relates to a special positioning fixture, in particular to a special positioning fixture for assembling sapphire crystal rods. (2) Background technology [0002] Sapphire has excellent physical and chemical properties, and is currently widely used in the manufacture of high-brightness LED substrates. The preparation process of the sapphire substrate includes a series of processes such as crystal growth, directional extraction of the ingot, grinding of the cut end, rolling of the ingot, slicing, grinding, and polishing. [0003] Among them, in order to improve the processing efficiency in the ingot barrel grinding process, it is necessary to assemble the sapphire ingots with the same diameter but relatively short length within a certain total length, and then enter the process of grinding the outer circle. In order to reduce the amount of reserved removal and improve the efficiency of cylindrical grinding, it is necessary to accuratel...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the bonding efficiency is low, and the concentricity deviation between the assembled ingots cannot be guaranteed to be basically consistent, which is not conducive to the processing of subsequent processes.

In addition, although the current method can guarantee the coaxiality of the two centering discs, it is not easy to ensure the coaxiality between the center of the centering disc and the center of the ingot, which is likely to cause Since the center of the ingot is not in the same axis as the center of the centering disk, the ingot swings when grinding the outer circle, which affects the efficiency of the outer circle grinding process.

Images