摘要
在Simufat.forming软件中进行C15不锈钢变薄拉深成形过程有限元仿真模拟,以变薄率、凹模锥角和拉深速度为工艺参数变量,设计3因素3水平L_(9)(3^(3))正交试验,以工件变薄拉深过程中的拉深力、残余应力与壁厚回弹量为成形质量评价指标,采用变异系数法对3个评价指标进行客观权重分配,引入Vague集对正交试验结果进行多目标优化,得到最优工艺参数组合以及各工艺参数对综合评价指标的影响顺序。结果表明:变薄率为42%、凹模锥角为9°、拉深速度为10 mm·s^(-1)时,C15不锈钢变薄拉深工件的成形质量较高。各工艺因素对变薄拉深件的综合成形质量的影响顺序为:拉深速度>变薄率>凹模锥角。对仿真结果进行试验验证,仿真和试验结果的最大相对误差(壁厚回弹量)不大于7.61%,仿真结果具有良好的可靠性,可对实际生产提供理论指导。
Finite element simulation of ironing process for C15 stainless steel was carried out in Simufat.forming software. Taking ironing rate, concave mold cone angle and ironing speed as the process parameter variables, L_(9)(3^(3))orthogonal experiment with three factors and three levels was designed. Taking ironing force, residual stress and wall thickness springback amount as the evaluation indexes of forming quality, the variation coefficient method was adopted to objective weight distribution of three evaluation indexes. The Vague set was introduced to the orthogonal test results for multi-objective optimization, the optimal combination of process parameters and the influence order of each process parameter on the comprehensive evaluation index were obtained. The results show that when the ironing rate is 42%, the concave mold cone angle is 9° and the ironing speed is 10 mm·s^(-1), the forming quality of C15 stainless steel ironing workpiece is higher. The influence order of process factors on comprehensive forming quality for ironing parts is as follows: ironing speed > ironing rate >concave mold cone angle. The maximum relative error(wall thickness springback amount) of the simulation and test results is not more than 7.61%. The simulation results have good reliability, which can provide theoretical guidance for practical production.
作者
张辰锐
李辉
Zhang Chenrui;Li Hui(Department of Physics,Lyuliang University,Lyuliang 033000,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第1期115-120,共6页
Forging & Stamping Technology
基金
国家自然科学基金优秀青年科学基金资助项目(51422404)
山西省高等学校科技创新项目(2020L0683)
山西省高等学校教学改革创新项目(J20221165)
吕梁市重点研发项目(2021GXYF-2-60)。
