气固两相磨粒流对刀具刃口钝化的数值模拟  

Numerical Simulation of Tool Edge Preparation by Gas-Solid Two-phase Abrasive Flow

作　　者：杜宇超 赵雪峰[1] 何林[1] DU Yu-chao;ZHAO Xue-feng;HE Lin(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵阳550025

出　　处：《组合机床与自动化加工技术》2019年第5期142-145,151,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51665007)

摘　　要：刀具刃口钝化通过消除刃区结构的微观缺陷,改变切削刃的微观形貌,以得到延长刀具的使用寿命,提高刀具的切削性能,改善已加工零件的表面质量的目的。文章采用计算机流体动力学理论和冲蚀磨损理论相结合,采用流体软件Fluent和离散元EDEM,基于standard k-ε湍流模型和Hertz-Mindlin with Archard Wear磨损模型,建立了刀具在气固两相流内钝化的仿真模型,研究了刀具刃口钝化速度和钝化时间对磨粒速度、刀具磨损量和刀具累积能量的影响规律,为高速高效钝化奠定基础。Tool edge preparation prolongs the service life of tool and elevates the processing surface quality and cutting performance through modifying the cutting edge contour and microstructure. In this paper,based on the theory of computer hydrodynamics and the theory of erosion and abrasion and the standard k-ε turbulence model and the Hertz-Mindlin with Archard Wear wear model, a simulation model of tool edge preparation in gas-solid two-phase flow is established by using the fluid software Fluent and the discrete element EDEM,. The effects of tool preparation speed and preparation time on abrasive velocity, tool wear and tool cumulative energy were studied, which laid a foundation for high speed and high efficiency preparation.

关 键 词：刀具刃口钝化 EDEM FLUENT 气固两相磨粒流 

分 类 号：TH164[机械工程—机械制造及自动化] TG714[金属学及工艺—刀具与模具]