High quality and high efficiency cutting tool technology of titanium alloy

Research on machinability of workpiece material is the basis of developing high performance cutting tools. Based on the analysis of material cutting removal mechanism, combined with dynamic mechanical property testing, cutting test and numerical simulation, theoretical modeling and experimental and simulation studies were conducted on the thermal-mechanical load coupling, material cutting deformation and failure mechanism, knife-chip and knife-work interface contact and tribological behavior during the cutting process of titanium alloy, which can reveal the leading factors affecting the machinability of titanium alloy. It is helpful to guide the design, manufacture and selection of high quality and efficient cutting tools for titanium alloy.

In the aspect of tool material design, the matching analysis of mechanical and physical and chemical properties of titanium alloy and tool materials is carried out, the material science and thermodynamics research system of the tool-workpiece function of titanium alloy cutting is established, and the tool wear law in the cutting process of titanium alloy is explored and the tool wear mechanism is revealed through cutting tests and simulation. Then the tool material system suitable for high quality and high efficiency machining of titanium alloy is designed and optimized.

In terms of tool coating preparation, including the design and selection of new tool coating materials and tool coating preparation process, it is necessary to select coating materials with anti-friction, wear-resistant and thermal barrier effects according to the high chemical activity characteristics of titanium alloys, and develop corresponding coating preparation processes and equipment. At the same time, surface post-treatment processes such as micro-sandblasting and cryogenic treatment were developed to improve the micro-geometry of the cutting edge of the tool and the microstructure of the coating surface material, so as to realize the synergistic strengthening of the mechanical properties of the cutting edge of the coating tool and the surface layer.

In terms of tool structure design, according to the characteristics and technical requirements of titanium alloy processing technology, the development of titanium alloy processing special edge tools (such as Wiper blades), overall superhard materials and densely toothed structural tools can achieve high efficiency cutting and high surface quality machining. In the optimization of tool cutting parameters, cutting parameters can be optimized according to economic and technical indicators such as titanium alloy surface processing quality, processing efficiency and processing cost to achieve high quality and efficient processing of titanium alloy. At the same time, the development of tool processing status monitoring technology and the establishment of cutting processing database, to achieve the processing process status monitoring and intelligent push of process parameters and other functions, promote the development of intelligent manufacturing and engineering applications.