Simulation of Cutting Behavior in Green Powder Compact by using Distinct Element Method
This study discusses cutting failure characteristics of iron powder compact.Cutting behavior in horizontal milling processing has been demonstrated by 2D distinct element method.Porosity of the compact is set to 20%and parallel bonding which generates resistance against rotational moment between the particles was applied.Strength of green compact is adjusted by changing parallel bonding parameter which are tensile bond strength,cohesion and internal friction angle.Green machining has been also conducted for conventional atomized iron powder compact.Degree of breakage at both of cutting inlet and outlet was investigated for several milling conditions.Influence of rake angle of endmill was also evaluated.Results are summarized as follows;(1)The degree of breakage is emphasized at outlet corner due to poor tensile strength of green compact especially for higher feed rate cutting.(2)The degree of breakage at inlet corner is almost stable even though higher feed rate if higher tensile bond stress and cohesion applied between particles.(3)Restraint of crack propagation is not achieved even if friction angle increased.(4)Negative rake angle of endmill is effective to avoid cracking occurrence.
Green machining Distinct element method Feed late Milling speed Shear failure
Taniguchi Yukinori Yagi Naoki Ohmae Yuya Mizuta Kohei
Department of Mechanical Engineering,National Institute of Technology NARA College,22 Yata-cho,Yamat Student of Faculty of Advanced Engineering,National Institute of Technology NARA College,22 Yata-cho
国际会议
北京
英文
2069-2074
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）