Study On Mechanism Of Cutting Titanium Alloy With Surface-textured Cutting Tool

The titanium alloy,as an important alloy,has many uses,and can be used in the aspects of the air space part,the biological medicine,the daily necessities and the automobile parts.However,the difficult processing property of titanium alloy is one of the most important subjects in the field of cutting.According to the existing titanium alloy research literature,it can be found that the reasonable processing of the micro-texture on the surface of the tool can improve the cutting condition,reduce the cutting temperature and prolong the service life of the cutter.Titanium alloy machining using thermal assisted machining technology can also improve the cutting performance of titanium alloys.In recent years,more researchers of cutting titanium tools have been assisted with advanced thermal processing technology to design cutting tools,in this way,the process of cutting titanium alloy can be easier.Based on the existing literature research data of new cutting titanium alloy surface textured cutting tools,this paper designs four types of grooved surface textured tools,and studies the cutting performance of different types of grooved surface textured tools under texture parameters.A raised hump-type textured cutting tool was also designed,and the cutting performance of the raised hump-type surface textured cutting tool under different thermally assisted processing temperatures and different cutting speeds were studied.In this paper,the microtexture fabrication technology is applied to the surface of cutting tools,and the cutting performance of microtextured tools with different parameters under different cutting speeds and different thermal assisted machining temperatures is studied by experiments and finite element simulation.The main research results are as follows:(1)According to the shape of mole claw,a semi-elliptical groove micro-texture tool is designed,and a semi-circular groove micro-texture tool,a ladder groove micro-texture tool and a triangular groove micro-texture tool are designed to compare with them.The mathematical modeling,force model analysis and chip flow analysis of four kinds of micro-texture tools are carried out respectively.Many kinds of texture with different parameters were prepared for four different texture tools.The properties of micro texture tools with different parameters in the process of cutting titanium alloy were studied,and the reasonable texture parameters were selected for different micro texture tools.It is found that the semi-elliptical groove texture tool can adapt to a variety of cutting conditions.(2)The convex hump is prepared on three different common tool surfaces,and the cutting temperature,tool temperature,tool stress,cutting force and tool wear in the cutting process of the hump type texture cutter are studied by the finite element software modeling and simulation analysis method.It is found that the convex hump type texture cutter has a significant effect in reducing the wear of the tool.(3)In this paper,the cutting performance of micro-texture tool under different heat-assisted machining temperatures is studied in combination with thermal-assisted machining technology,combined with experimental and finite element simulation software.The cutting force and the tool wear condition of the conventional WNMG cutting tool under the conditions of room temperature and three kinds of heat-assisted machining are studied.In this paper,three conventional cutters,including WNMG cutting tool,and the cutting performance comparison under the condition of hot-assisted machining,are studied.It is found that the cutting force of the cutting tool can be effectively reduced after the application of the hot-assisted machining technology,and some negative effects of the convex hump-type texture cutting tool in the cutting process can be compensated.(4)In this paper,the second cutting phenomenon in the cutting process of the micro-texture cutter is simulated,and the three kinds of cutting conditions that may occur in the secondary cutting are analyzed,and the cutting performance of the secondary cutting phenomenon under the condition of hot-assisted machining is simulated by the finite element software.It is found that the secondary cutting phenomenon is different from the conventional cutting in terms of certain cutting performance.