Determination method of first initial side surface of fly-cut monocrystalline germanium two-dimensional six-surface rotating drum

Abstract

The invention discloses a determination method of a first initial side surface of a fly-cut monocrystalline germanium two-dimensional six-surface rotating drum. The determination method comprises the following steps: (S1) a monocrystalline germanium cylinder rod growing along a crystal surface is cut as upper and lower reference planes; (S2) the upper reference plane is roughly turned as an end surface; (S3) after the end surface is roughly turned, a vertical line is produced perpendicular to the radial center line on the upper reference plane of the monocrystalline germanium cylinder rod from the geometric center point of the monocrystalline germanium rod by a distance R with the radial center line of any white spot petal on the surface as reference; (S4) a normal plane of the radial center line is produced by passing through the vertical line; (S5) the normal plane is deflected to the geometric center axle of the rod around the vertical line; the deflected angle is a theoretic dip angle theta formed between a first surface of the two-dimensional six-surface rotating drum and the upper reference plane; and the obtained deflected plane is the first surface of the two-dimensional six-surface rotating drum; and (S6) on this basis, a radial blank allowance is left for the first surface of the two-dimensional six-surface rotating drum, so that the ultraprecise fly cutting for the first surface of the two-dimensional six-surface rotating drum after rough milling and grinding is convenient.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for determining the first initial side surface of a fly-cut single-crystal germanium two-dimensional six-sided drum. Background technique [0002] Due to the special optical properties of single crystal germanium materials, it is widely used in high-tech fields such as aerospace exploration, weaponry and equipment. However, the directionality of the crystal structure of single crystal germanium leads to the anisotropy of its physical and mechanical properties, and also leads to the anisotropy of the surface quality after cutting. In the early 1980s, the academic field began to study the influence of the crystal structure of single crystal germanium on the surface quality of machining, but the current research results are limited to the general description of machining phenomena. The process method that the surface quality of precision machining is affected...

AI Technical Summary

Problems solved by technology

However, the existing ultra-precision fly-cut single-crystal germanium two-dimensional six-sided drum process does not consider the anisotropic periodic variation of single-crystal germanium material mechanics, and the determination of the first initial side surface is not directional selection, but random Arbitrary selection, thus lacking crystal orientation process and process optimal matching process

In order to achieve the processing quality and the consistency requirements of the processed surface, the existing cutting parameters can only be selected too small in order to achieve the brittle-plastic transition, which leads to low efficiency, long cycle time, high production cost and high scrap rate of ultra-precision fly-cutting.

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