锻压技术

基于有限元计算的冷锻压力机组合机身的结构优化

英文标题：Structural optimization on combination body of cold forging press based on finite element calculation

作者：白玉冰侯佳欣张志国李江国蒋鹏

单位：中国锻压协会北京机电研究所有限公司中国国际工程咨询有限公司江苏中兴西田数控科技有限公司中机锻压江苏股份有限公司

分类号：TH17

出版年,卷(期):页码：2020,45(6):130-135

摘要：

以连杆式冷锻压力机的闭式组合机身为研究对象，将机身三维模型导入Workbench中建立有限元分析模型，进行静力学分析和模态计算，得到机身应力整体在160 MPa以下，机身挠度为0.36 mm，一阶频率为15.886 Hz，均满足使用要求。立柱Z向变形为0.32 mm，超过许用值0.2 mm，因此机身有优化的余量和必要。采用多目标优化的方法，以静力学分析为基础，定义机身不同板厚为设计变量，设置机身受到的应力、立柱Z向变形为约束条件，以机身重量为目标函数。对比3组不同计算结果得到的优化方案，选择方案1：机身重量由73828 kg变为66706 kg，机身重量减少9.6%，实现了机身的轻量化。对优化后的机身进行刚度计算和模态分析，得到机身挠度为0.35 mm，立柱Z向变形量为0.18 mm，一阶频率为15.688 Hz，可以满足实际使用要求。因此在压力机设计中，可以考虑减薄板厚，以实现在满足使用要求的前提下达到机身减重、降低制造成本的可能。

For the closed combination body of connecting rod cold forging press, the finite element analysis model for static analysis and modal calculation was established by importing 3D model of body into Workbench, and the stress of press below 160 MPa, the deflection of 0.36 mm for press, and the first-order frequency of 15.886 Hz were obtained to meet the requirements of engineering. However, the Z-direction deformation of 0.32 mm for column exceeded the allowable value of 0.2 mm, so the press had the optimized allowance and necessity. Based on static analysis， the different thicknesses of press were designed as the define variables, the stress on the press and the Z-direction deformation of the column were set as the constraints, and the weight of press was taken as the objective function by the multi-objective optimization method. Then, the optimization schemes obtained from the three different results were compared, and the scheme one was selected. The calculation results show that the weight of press is changed from 73828 kg to 66706 kg, and the weight is reduced by 9.6% to realize the lightweight of press. Furthermore, the stiffness calculation and modal analysis of the optimized press show that the deflection of press is 0.35 mm, the Z-direction deformation of column is 0.18 mm, and the first-order frequency is 15.688 Hz, which meet the actual use requirements. Thus, in the design of press, the thickness of sheet is reduced to achieve the possibility of reducing the weight for press body and the manufacturing cost under the premise of meeting the requirements of use.

基金项目：

白玉冰（1981-），男，学士，工程师 E-mail：byb81@126.com

参考文献：

［1］潘庆元.1350吨多连杆冷锻压力机的参数优化及动力学研究
［D］.北京：机械科学研究总院集团有限公司，2013.

Pan Q Y. Parameters Optimization and Dynamics Research on a 1350 ton Muiti-link Cold Forging Press
［D］.Beijing：China Academy of Machinery Science and Technology Group Co.,Ltd.，2013.

［2］张皓,贾方,王兴松.闭式压力机组合机身的有限元分析
［J］.锻压装备与制造技术,2006,41 (4):32-35．

Zhang H,Jia F,Wang X S.FE analysis of combined frame of straight side press
［J］. China Metal forming Equipment& Manufacturing Technology，2006，41 (4):32-35．

［3］金红.高速压力机闭式组合机身有限元分析及优化
［D］.桂林：广西大学，2004.

Jing H. Finite Element Anslysis and Optimization of High-speed Colse Combined
［D］.Guilin：Guangxi University，2004.

［4］闫玉芝. LTH450T高速压力机运动机构及机身结构的仿真分析与优化
［D］.济南：山东大学,2014.

Yan Y Z. Simulation Analysis and Optimization of LTH450T High-speed Press Motion Mechanism and Fuselage Structure
［D］. Jinan：Shandong University, 2014.

［5］郝滨海,张勇,杨芳. 高能螺旋压力机整体机身有限元分析及结构改进
［J］. 山东大学学报：工学版, 2002，32(2): 163-166.

Hao B H, Zhang Y, Yang F. FEM analysis and optimiz ation of high-energy screw press straight-side frame
［J］. Journal of Shandong University：Engineering Science, 2002，32(2): 163-166.

［6］刘惟信.机械最优化设计
［M］.第2版.北京: 清华大学出版社,2000.

Liu W X. Mechanical Optimization Design
［M］.The 2nd Edition. Beijing: Tsinghua University Press,2000.

［7］ANSYS.Inc. ANSYS Advanced Analysis Techniques Guide
［M］. Canonsburg,PA,USA:ANSYS.Inc., 1999.

［8］侯佳欣，李江国，蒋鹏.12500 kN冷锻压力机机身结构的有限元分析
［J］.锻压技术，2018，43（5）：89-94.

Hou J X，Li J G，Jiang P. Structural FEM analysis on 12500 kN cold-forging press frame
［J］.Forging & Stamping Technology，2018，43（5）：89-94.

［9］杨东祺. CWFP12500KN冷锻压力机机身有限元模态分析及结构优化
［D］.北京：机械科学研究总院集团有限公司,2014.

Yang D Q. Study on Finite Element Modal Analysis and Structure Optimum Design of CWFP12500KN Cold Forging Press
［D］. Beijing：China Academy of Machinery Science and Technology Group Co.,Ltd.,2014.

［10］宋志安，于涛，李红艳．机械结构有限元分析: ANSYS 与ANSYS Workbench 工程应用
［M］．北京:国防工业出版社，2012.

［11］袁金刚. 伺服压力机整机有限元分析与机身的结构优化
［D］.武汉：华中科技大学,2009.

Yuan J G. Finite Element Analysis of Servo Press Machine and Structural Optimization of the Fuselage
［D］. Wuhan：Huazhong University of Science and Technology, 2009.

［12］马正鹏. 物理拉深筋对高强钢板成形质量影响的数值模拟及其结构参数优化
［D］.济南：山东大学,2009.

Ma Z P. Numerical Simulation of the Effect of Physical Drawing Bars on the Forming Quality of High-strength Steel Plate and Optimization of Its Structural Parameters
［D］. Jinan：Shandong University, 2009.

服务与反馈：

【文章下载】【加入收藏】