基于微几何学的变尺度强化带复杂刃形刀具刃切削机理研究

The cutting parameter and cutting load of different cutting edge sections of complex geometries tools are very different, like multi-tooth accurate threading tools for oil pipes. In order to exert the performance of each cutting edge section and achieve the optimal cutting of workpiece material, the new idea of "Variable Size" design for edge preparation of complex geometries tools is put forward. It's main idea is to regulate the edge preparation geometric parameters of complex geometries tools, build the theory model of variable size edge preparation and study the edge-cutting mechanism from the aspect of engineered micro-geometry based on the modern principles of metal cutting, numerical analysis and complex edge preparation technology. In aspect of cutting edge design in cutting edge normal plane, the design of complex cutting edge structure for accurate full form threading tools is proposed. For assessment of cutting edge surface quality, on the basis of 3D morphology numerical lens projection technology, micro abrasive jet polish technology, tribology , cutting edge microstructures are regulated and wear mechanism is studied. This study will form the "Variable Size" design system of edge preparation for complex geometries tools, enrich the modern cutting mechanism, conduct the design and production of modern tools and promote the development of advanced cutting technology.

石油管精密螺纹梳齿刀具等复杂刃形刀具的各切削刃区段切削层参数和切削载荷差异较大，为充分发挥刀具各刃区段切削性能，实现工件材料的最佳剪切切除，提出复杂刃形刀具切削刃强化带"变尺度"设计的新理念和新方法。其核心思想是，基于现代金属切削原理、数值分析、刃口复合强化技术，从微几何学角度综合调控复杂刃形刀具刃区强化带几何参数，构建变尺度切削刃强化带理论模型，深入研究其刃切削机理；在切削刃法剖面内刃口结构设计方面，提出适用于精密螺纹成形刀具的复合型刃口结构设计方法；在刃区表面质量评定技术方面，基于3D形貌数字微透镜投影技术、微磨料气流研磨技术、摩擦学，综合调控各刃区段微观形貌，研究刀具微观磨损机理。本项目将形成复杂刃形刀具切削刃强化带"变尺度"设计的理论体系，丰富现代刃切削机理，指导现代刀具的设计与生产，促进先进切削技术的快速发展。

石油管精密螺纹梳齿刀具等复杂刃形刀具的各切削刃区段切削层参数和切削载荷差异较大，为充分发挥刀具各刃区段切削性能,实现工件材料的最佳剪切切除，提出复杂.刃形刀具切削刃强化带“变尺度”设计的新理念和新方法。其核心思想是，基于现代金属切削原理、数值分析、刃口复合强化技术，从微几何学角度综合调控复杂刃形刀具刃区强化带几何参数，构建变尺度切削刃强化带理论模型，深入研究其刃切削机理；在切削刃法剖面内刃口结构设计方面，提出适用于精密螺纹成形刀具的复合型刃口结构设计方法；在刃区表面质量评定技术方面，基于 3D 形貌数字微透镜投影技术、微磨料气流研磨技术、摩擦学及分形理论，构建其理论模型，综合调控各刃区段微观形貌，研究刀具微观磨损机理，建立刃区微观形貌的表面完整性综合评定体系。本项目将形成复杂刃形刀具切削刃强化带“变尺度”设计的理论体系，丰富现代刃切削机理，指导现代刀具的设计与生产，促进先进切削技术的快速发展。