Wear Patterns and Mechanisms of Cutting Tools in High Speed Face Milling

High speed machining has received an important interest because it leads to an increase of productivity and a better workpiece surface quality. However, at high cutting speeds, the tool wear increases dramatically due to the high temperature at the tool-workpiece interface. Tool wear impairs the surface finish and hence the tool life is reduced. That is why an important objective of metal cutting research has been the assessment of tool wear patterns and mechanisms. In this paper, wear performances of PCBN ...     

模具高速加工技术及其对CAM系统的要求

介绍了模具高速加工技术及高速加工对加工设备、刀具和CAM系统的特殊要求,并对其关键技术进行了探讨.     

基于Mastercam环境下薄壁电极的高速加工设计

分析了注塑模具制造过程中薄壁铜电极的工艺、结构特点,研究了基于Mastercam软件支持下的以控制变形为目的的数控高速加工工艺,并进行了玩具中电池盒的骨位铜电极加工设计,提出利用Mastercam软件高效地解决薄壁铜电极的数控加工方法。     

Assessment of Deformation of Shear Localized Chip in High Speed Machining

As the cutting speed goes higher, the mechanism of chip deformation will be changed significantly, i.e., continuous chip in low cutting speed will shift to serrated chip with shear localization. For the shear localized chip, the parameters used to assess the chip deformation for continuous chip, such as shorten coefficient ξ, shear angle φ and shear strain ε, can not describe the chip deformation correctly or comprehensively. This paper deals with the assessment of chip deformation of shear localization. Th...