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Abstract：
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Speed is one of the main factors to affect the life of aluminum extrusion porthole die.At different extrusion speeds,mold temperature and pressure are different,and such situations have a direct impact on the die life.Taking aluminum extrusion rectangular tube as an example,extrusion process of porthole die was simulated by finite element software Deform,and the regularity for change of porthole die temperature and pressure was obtained.The results show that with velocity increases,the temperature of porthole die working parts gradually increases,and the pressure reduces at first than gradually increases.The mechanism of temperature and pressure change affecting the die life was studied.It is pointed out that the influence of extrusion velocity affecting die life can accelerate plastic deformation,wearing of porthole die working parts and failure of stress concentration parts,and also can intensify the heat and cold fatigue phenomenon of porthole die.
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Funds：
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有色金属及材料加工新技术教育部重点实验室开放基金(GXKFJ-13)
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AuthorIntro：
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Reference：
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