An ultra-precision cutting method based on surface microstructure design

Abstract

The invention provides an ultra-precision cutting method based on surface microstructure design, comprising the following steps: Rough machining: using a machine tool to remove excess material on the workpiece, preparing the geometric profile of the workpiece for semi-finishing, and leaving Machining allowance, the thickness of the machining allowance is micron level; semi-finishing: on the surface of the workpiece to be processed after rough machining, use the machine tool to process several densely arranged defect structures, that is, the geometric size is micron level or nanometer level The depth of various micro / nano structures is less than the machining allowance; finishing: use machine tools to remove the micro / nano structures and remaining machining allowances processed in semi-finishing, and the cutting depth is equal to that in rough machining The thickness of the reserved machining allowance, through comprehensive control of the finishing process and semi-finishing process, the designed micro / nano structure is obtained on the surface of the workpiece to be processed, so as to control the cutting force on the tool during finishing and reduce the cutting process In order to achieve the purpose of improving the life of the tool and obtaining nano-scale surface roughness on difficult-to-machine materials, the generation of medium heat is achieved.

Description

technical field [0001] The invention relates to the technical field of cutting processing, in particular to an ultra-precision cutting method based on surface microstructure design. Background technique [0002] Among the refractory materials in the prior art, titanium alloy is a promising high-quality alloy material, because of its outstanding advantages such as high strength, low density, good corrosion resistance and low elastic modulus, especially under high temperature conditions. It can maintain these characteristics well, so it has been widely used in aerospace, aviation and medical equipment and other fields. Titanium alloys are generally considered to be difficult materials to machine for the following reasons: (1) When machining titanium alloys, a large amount of heat is generated in the workpiece-tool and tool-chip contact areas. Due to the low thermal conductivity of titanium alloys, it leads to This area forms a high temperature that is difficult to eliminate; ...

AI Technical Summary

Problems solved by technology

However, most of the tools are made of diamond. Since diamond itself is a difficult-to-machine material, it is necessary to process specific micro- and nano-structures on the surface of diamond tools to reduce cutting force, cutting temperature and improve the contact area between the tool and the workpiece. The purpose is very difficult

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