The invention belongs to the technical field of
crystal material precision
machining, and particularly relates to an edge breakage prevention method for a multi-
wire cutting crystal material, which comprises the steps of preparing a
crystal to be
cut, selecting a protective material, fixing the protective material, carrying out multi-
wire cutting operation and carrying out subsequent treatment. The protective material is tightly attached to the to-be-
cut surface of the crystal in a vacuum or
electrostatic adsorption mode and is matched with mainstream multi-
wire cutting equipment,
cutting parameters are accurately controlled, and the protective material is cleaned and reused after
cutting. Stress buffering is achieved through the moderate elasticity of the acrylic glass,
visualization of the
cutting process is guaranteed through high light
transmittance, the material cost is low, repeated use is achieved, and equipment does not need to be transformed. By applying the method, the edge
breakage rate of brittle crystals such as
yttrium vanadate can be reduced to 1% or below, the yield is increased to 99% or above, the comprehensive
processing cost is reduced by 60% or above, and the method is suitable for high-end
processing scenes such as
laser crystals and
semiconductor substrates and has wide popularization value.