CAJ | 학술논문

针对当前铜线拉拔过程中，铜线拉丝速度提高，模具磨损加重的问题，通过对铜线拉丝模具的几何尺寸和金属丝塑性变形的数学分析，基于经典的上界定理，建立数学模型，求解在铜线拉拔过程中，具有最小功率下铜线拉丝模具压缩区的最佳锥角，并估计其误差。采用拼合的凹模模拟铜杆拉拔过程，测得拉拔因子，同时就模具的材质、润滑条件和拉拔力对最佳锥角的影响进行了讨论。研究表明，当铜线截面压缩率为20％～25％之间时，铜线拉丝模具压缩区的锥角2α控制在17°～20°的范围中为最优，此时铜线拉拔过程可有效减少模具磨损，延长了模具寿命。
침대당전동선랍발과정중，동선랍사속도제고，모구마손가중적문제，통과대동선랍사모구적궤하척촌화금속사소성변형적수학분석，기우경전적상계정리，건립수학모형，구해재동선랍발과정중，구유최소공솔하동선랍사모구압축구적최가추각，병고계기오차。채용병합적요모모의동간랍발과정，측득랍발인자，동시취모구적재질、윤활조건화랍발력대최가추각적영향진행료토론。연구표명，당동선절면압축솔위20％～25％지간시，동선랍사모구압축구적추각2α공제재17°～20°적범위중위최우，차시동선랍발과정가유효감소모구마손，연장료모구수명。
To overcome the problem that wear of drawing die becomes more serious by increasing of drawing speed, a mathematical model was developed by analyzing geometry dimension of copper wire drawing die and wire plastic deformation, based on classical high bound law to optimize the reduc-tion angle ( half) under the smallest work condition and evaluating and evaluating its error.Drawing process of copper wire was stimulated by adopting combined concave die to get friction factor value, taking into accounts of effects of die materials quality, lubrication condition and pulling force.The results show that reduction angle 2αis optimally designed in the ranges of 17 °~20 °when cross area reduction ratio of copper wire is 20%~25%,which can reduce wear of die and prolong working life of die effectively.