CAJ | 학술논문

阐述了塑性成形中热力耦合效应的数值分析方法,建立了铝合金空拉拔过程热耦合计算的有限元模型,设计了两组模拟方案,一组以拉拔速度为变量,速度变化范围为50～200mm/s,一组以摩擦系数为变量,变化范围为0.02～0.4.通过模拟仿真获得了拉拔过程中模具和管子温度场的分布,并依据拉拔速度方案和摩擦系数方案得到了拉拔结束后模具最高温度分布和拉拔速度及摩擦系数的关系.结果表明,模具最高温度随拉拔速度的增加和摩擦系数的增加都是近似线性的增加;对坯料及模具温度场的仿真预测为润滑剂的选取、拉拔工艺及模具设计提供了依据.
천술료소성성형중열력우합효응적수치분석방법,건립료려합금공랍발과정열우합계산적유한원모형,설계료량조모의방안,일조이랍발속도위변량,속도변화범위위50～200mm/s,일조이마찰계수위변량,변화범위위0.02～0.4.통과모의방진획득료랍발과정중모구화관자온도장적분포,병의거랍발속도방안화마찰계수방안득도료랍발결속후모구최고온도분포화랍발속도급마찰계수적관계.결과표명,모구최고온도수랍발속도적증가화마찰계수적증가도시근사선성적증가;대배료급모구온도장적방진예측위윤활제적선취、랍발공예급모구설계제공료의거.
The method of numerical analysis coupled thermal-mechanical effect during plastic forming was illustrated.A simulation model of drawing process based on heat coupling was set up,and two simulation plans,one with different drawing velocity in the range of 50～150 mm/s and another with different friction coefficient in the range of 0.02～0.4,was designed.According these two plans,the relationship between the maximum temperature of die and velocity of drawing,and the relationship between the maximum temperature of the die and the friction coefficient were gained.The results show that the maximum temperature of the die has a nearly linear increase with the increase of drawing velocity or the increase of friction coefficient.The simulation predictions of temperature field offer some references for the selection of anti-friction material and design of drawing process and die.