Cryogenic temperature extrusion machining is introduced into the turning process of 6061-T6 aluminum al-loy,combined with finite element simulation technology,the effect of cryogenic temperature extrusion machining on the turn-ing of 6061-T6 aluminum alloy is explored. The finite element simulation models of cryogenic temperature extrusion machi-ning (CT-EM) and room temperature extrusion cutting (RT-EM) are established and simulated to compare and analyze the effect of different tool rake angle and compression ratio on the effective strain,effective strain rate,effective stress,cutting temperature and chip morphology. The results show that with the increase of tool rake angle and compression ratio,the effec-tive strain rate,maximum effective stress distribution area and maximum cutting temperature of CT-EM and RT-EM are de-creasing. The value and distribution area of maximum effective strain decrease with the increase of rake angle and increase with the increase of compression ratio. Effective strain rate,value and distribution area of maximum effective strain and ef-fective stress distribution area of CT-EM are larger than those of RT-EM. CT-EM has a larger effective strain rate,the value of maximum effective strain and distribution area,and the distribution range of effective stress than RT-EM,with lower cut-ting temperature,flatter chip morphology,higher filling rate,and better forming effect.
关键词
铝合金/深冷挤出切削/有限元/等效应变/等效应力/切屑形态
Key words
aluminum alloy/cryogenic temperature txtrusion machining/finite element analysis/effective strain/effective stress/chip morphology
维普
万方数据