文章摘要
某大曲率薄壁件成形参数优化
Optimization of Forming Parameters for a Large Curvature Thin-walled Part
  
DOI:10.3969/j.issn.1674-6457.2023.04.025
中文关键词: 大曲率薄壁件  冲压速度  摩擦因数  正交试验  响应面试验
英文关键词: large curvature thin-walled part  stamping speed  friction coefficient  orthogonal experiment  response surface test
基金项目:河南省科技攻关项目(212102210340)
Author NameAffiliation
LI Ye School of Mechanical and Electrical Engineering, Huanghe Jiaotong University, Henan Jiaozuo 454950, China 
ZHOU Pei-li Department of Automobile Engineering & Technical Service, Guangdong Machinery Technician College, Guangzhou 510450, China 
LI Yan-qin School of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China 
ZHANG De-hai School of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China 
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中文摘要:
      目的 根据某大曲率薄壁件形状需求,以最大减薄率为优化目标,采用数值模拟与响应面相结合的方法对其成形的工艺参数进行优化,以得到合格的零件产品。方法 首先,研究压边力、拉延筋阻力、摩擦因数、冲压速度等单因素参数对最大减薄率的影响规律。根据规律变化确定正交试验的参数范围,并对正交试验结果进行极差分析,确定本次板料冲压成形有限元分析的工艺参数对最大减薄率影响大小的排序为:摩擦因数>压边力>拉延筋阻力百分比>冲压速度;根据极差分析结果,选定对最大减薄率影响较小的冲压速度为3 000 mm/s、其他3个工艺参数为变量进行再次优化,以摩擦因数、压边力、拉延筋阻力为优化对象建立响应面。结果 通过响应面预测结果可知,摩擦因数为0.09、压边力为409.730 kN、拉延筋阻力为32.384%时,最大减薄率得到最小值7.926%。将该组工艺参数进行模拟,得到最大减薄率为9.40%,与响应面预测值仅相差1.474%,相对误差率为15.68%。结论 经过试验验证,试验和优化的数值分析结果吻合较好,最大减薄率仅相差0.60%,证明了该方法的可行性。
英文摘要:
      The work aims to optimize the forming process parameters of a large curvature thin-walled part by combining numerical simulation with response surface method according to the shape requirement with the maximum thinning rate as the optimization objective, so as to obtain qualified parts. Firstly, the effect of single-factor parameters such as edge pressing force, rib resistance, friction coefficient and stamping speed on the maximum thinning rate was studied. According to the change law, the parameter range of the orthogonal experiment was determined and the range analysis was carried out to the orthogonal experiment results. Then, the sequence of the effect of the process parameters on the maximum thinning rate in the finite element analysis of sheet metal stamping was determined as follows:friction coefficient>pressing force>percentage of rib resistance> stamping speed. According to the results of range analysis, the stamping speed with little effect on the maximum thinning rate was selected as 3 000 mm/s, and the other three process parameters were selected as variables for re-optimization. Next, the friction coefficient, edge pressing force and rib resistance were used as the optimization object to establish the response surface. After predicted by the response surface, the minimum value of the maximum thinning rate was 7.926% when the friction coefficient was 0.09, the edge pressing force was 409.730 kN, and the rib resistance was 32.384%. After simulated by this set of process parameters, the maximum thinning rate was 9.40%, which was only 1.474% different from the predicted value of the response surface, and the relative error rate was 15.68%. After experimental verification, the experimental results are in good agreement with the optimized numerical analysis results, and the maximum thinning rate is only 0.60%, which proves the feasibility of the proposed method.
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