40-micron ultra-thin metal bond diamond scribing knife for faraday rotation sheet and application thereof

Abstract

The invention discloses a 40-micron ultra-thin metal bond diamond scribing knife for a faraday rotation sheet and an application thereof. The preparation method of the scribing knife comprises the following steps that the copper powder, the tin powder, the aluminum oxide and the titanium hydride are mixed to obtain a metal matrix; then the metal matrix is mixed with the liquid paraffin, the graphite balls and the diamond, then sieving is performed, and sieved objects are taken to obtain materials; the materials are pressed to obtain a cold-pressed blank body; the cold-pressed blank body is sintered to obtain a formed body; and the formed body is machined to obtain the diamond scribing knife for optical filter glass cutting. The disclosed scribing knife has the characteristics of being ultra-thin, high in rigidity and good in self-sharpening performance, under the condition that the thickness is only 40 microns, the cutting speed of an existing faraday rotation sheet can be increased from 0.2 mm / s to 0.5 mm / s, the service life can be improved from 10 pieces to 25-30 pieces, an existing electroforming knife disintegrating port is controlled to be about 50 microns, the disintegratingport of the disclosed scribing knife can be controlled to be 30 microns or within, moreover, batch production can be realized, and no knife breakage and chamfering phenomenon occurs.

Description

Technical field [0001] The invention belongs to the technical field of superhard materials for dicing knife technology, and specifically relates to a 40-micron ultra-thin metal bond diamond dicing knife for Faraday rotating plates and applications thereof. Background technique [0002] The main composition of the Faraday rotator is yttrium iron garnet and glass, the single-stage group is GPG, and the two-stage composition is PGPGP. Yttrium iron garnet has a garnet-type crystal structure and is an important variety of microwave ferrite. It has the characteristics of small resonance line width, low saturation magnetization, low dielectric loss and high density. It has become a widely used microwave ferrite device and an important basic material for circulators, isolators, phase shifters, modulators, filters, switches and other devices. [0003] Yttrium iron garnet has a Mohs hardness of 7-8 (reference diamond Mohs hardness of 10) and a thickness of 0.8 mm. The hardness of ordinary g...

AI Technical Summary

Problems solved by technology

However, this type of blade has the weakness of low cutting ability caused by too high bond strength, resulting in slow cutting speed (≤0.2mm / s); at the same time, due to the high bond strength, the diamond holding force is too strong, causing the scribing knife itself The self-sharpening is very poor, and the scribing knife becomes blunt after cutting a very short distance, and cannot be used due to the deformation and failure of the blade.

Due to the short life, frequent tool changes, and the very low cutting speed, the overall processing efficiency is very low. Enterprises need to purchase a large number of equipment, which increases the cost of equipment.

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