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赵春江,张飞涛,黄庆学,刘雁伟,苏梦颖.镁合金管高速滚珠旋压变形区温升特性研究[J].稀有金属材料与工程(英文),2019,48(7):2151~2158.[Zhao Chunjiang,Zhang Fietao,Huang Qingxue,Liu Yanwei and Su Mengying.Research on Temperature Rise Characteristics of Deformation Zone of Magnesium Alloy Tube by High Speed Ball Spinning[J].Rare Metal Materials and Engineering,2019,48(7):2151~2158.]
Research on Temperature Rise Characteristics of Deformation Zone of Magnesium Alloy Tube by High Speed Ball Spinning
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Received:December 29, 2017  Revised:March 26, 2018
DOI:
Key words: AZ31B magnesium alloy  thin-walled tube  ball spinning  temperature rising in deformation zone  finite element
Foundation item:国家自然科学基金(51375325);国家自然科学基金山西煤炭联合基金(U1610118, U1510131)
Author NameAffiliation
Zhao Chunjiang,Zhang Fietao,Huang Qingxue,Liu Yanwei and Su Mengying  
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Abstract:
      Ball spinning often requires a continuous cooling of the deformation zone due to the large amount of deformation heat generated by the continuous point-by-point molding characteristics. According to the low forming temperature of magnesium alloy, this paper uses friction and deformation heat to replace the heating process of the thin-walled magnesium alloy tube in ball spinning process. The heat generation laws under different process parameters are calculated by finite element simulation. The results show that the temperature in the spinning deformation zone increases with the increase of rotating speed, thinning amount, feed ratio and friction coefficient. For these four parameters, the friction coefficient has little effect on the temperature increase. The amount of thinning is the most sensitive to the increase of temperature, the effect of mold speed on the increase of temperature is little, and the friction coefficient has the least influence on the temperature rise. Under high speed and larger amount of thinning, the temperature of the deformation zone can reach more than 220℃, which can meet the temperature requirement of hot forming of magnesium alloy. The results of non-contact temperature measurement in the deformation zone show that the simulation results are in good agreement with the measured results.