基于切削能的硬质合金刀具前刀面切削刃近域微槽设计理论与方法

In view of the important influence of the structure near cutting edge upon cutting tool life, we propose a new design idea of the small size groove on the rake face near the cutting edge based on cutting energy. Through these studies, such as the cutting energy model, the design principle and method of the small size groove, and the cutting performance experiment for the new cutting tool, it will be revealed that the influence mechanism of the small size groove on the frictional energy and shear energy generation, distribution and heat conduction. The influences of the small size groove on the strength and anti brittleness damage of the area near cutting edge are studied, and the scientific evaluation system will be established for the small size groove based cutting energy design idea. Based on small size groove modeling method of the temperature field proposed by application team before, the small size groove iteration design is carried out to optimize the generation, distribution and conduction of cutting energy, reduce the cutting heat passing to cutting tool and the cutting temperature in rake face, and improve the tool durability. With manufacturing new designed cutting tool and carrying out cutting performance experiment, the effects of cutting parameters and the small size groove on cutting energy are studied further more，the design evaluation system of the small size groove will be revised, and the scientific design method and theory of the small size groove on the rake face near the cutting edge based on cutting energy will be established. In this project, it will publish 8-10 papers, and apply for more than 3 national invention patents. 2-3 kinds of new cutting tool will be developed. Besides, it will train 5-8 doctoral and graduate students.

前刀面切削刃近域结构对刀具寿命有非常重要的影响，针对其设计本项目提出基于切削能的近域微槽设计思想。通过切削能量模型、前刀面切削刃近域设计原理与方法以及创新微槽刀具切削性能实验等研究，揭示前刀面切削刃近域微槽结构对摩擦能和剪切能的产生、分配与热传导影响机制，预测评价微槽对刀刃强度及抗脆性破损的影响，建立切削刃近域微槽科学评价技术及体系。以切削难加工材料硬质合金刀具为背景，利用团队提出的基于温度场的切削刃近域设计方法，开展刀具微槽迭代设计，优化切削能的产生、分配和传导，降低传入刀具的切削热，达到降低刀具切削温度，提高刀具耐用度的目的。制备刀具，开展切削性能实验，进一步研究微槽结构对切削能的影响，修正微槽设计评价技术及体系，形成基于切削能的切削刃近域微槽造型科学设计方法理论。发表学术论文8~10 篇，申请国家发明专利3项以上，培养博士生、硕士研究生5~8人，研制2~3款新刀具。

前刀面切削刃近域结构对刀具寿命有非常重要的影响，基于此，项目开展了基于切削能的硬质合金刀具前刀面切削刃近域微槽设计理论与方法研究。通过切削能量模型、前刀面切削刃近域设计原理与方法和创新微槽刀具切削性能实验等研究，揭示了前刀面切削刃近域微槽结构对摩擦能和剪切能的产生、分配与热传导影响机制，预测评价了微槽对刀刃强度及抗脆性破损的影响，建立了切削刃近域微槽科学评价技术及体系。以切削难加工材料硬质合金刀具为背景，针对高温合金GH4169、40CrMnMo高强度钢、304不锈钢、201不锈钢及H13模具钢，开展刀具微槽迭代设计，优化切削能的产生、分配和传导，降低传入刀具的切削热，达到了降低刀具切削温度、提高刀具耐用度的目的。形成了刀具主切削刃近域微槽造型科学设计方法理论，实现了刀具微槽精准设计。发表了学术论文32篇(SCI、EI论文17篇，核心期刊论文10篇以上)，申请发明专利7项，获发明专利授权6项，培养了博士研究生6人、硕士研究生6人，完成了8场国际和全国性学术报告，为企业开发了6款新型微槽刀具。