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| 基于数值模拟的管材平面弯曲成形几何加工精度规律 |
| Geometric Machining Precision Law of Tube Plane Bending Forming Based on Numerical Simulation |
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| DOI：10.3969/j.issn.1674-6457.2023.03.020 |
| 中文关键词: 自由弯曲成形技术 数值模拟 加工精度 工艺参数优化 管材平面弯曲构件 |
| 英文关键词: free bending forming technology numerical simulation machining accuracy optimization of process parameters tube plane bending components |
| 基金项目:江苏省重点研发计划(BE2019007?3) |
| Author Name | Affiliation | | XIE Yuan-yuan | College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China | | WANG Hua | College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China | | XU Zhen-hua | College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China | | WANG Jin-ming | College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China | | LYU Zi-gui | Jiangsu Jicui Intelligent Technology Research Institute Co., Ltd., Nanjing 211800, China | | BAI Yong-hua | Jiangsu Jicui Intelligent Technology Research Institute Co., Ltd., Nanjing 211800, China |
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| 中文摘要: |
| 目的 建立高精度的有限元仿真模型可以有效地指导实际加工生产，在减少实验成本及结构件制造开发周期的同时提高成形效率。提高数值模拟中金属管材平面弯曲成形的几何加工精度，同时探究关键工艺参数对几何精度的影响规律，确定最佳工艺参数组合。方法 以管材平面弯曲成形构件为研究对象，建立了基于自由弯曲技术的管材弯曲成形有限元仿真模型，并通过实际加工实验验证了仿真精度，随后针对仿真模型的几何误差进行了参数补偿。将使用较高精度的仿真模型模拟得到的数据作为数据来源，研究关键工艺参数对仿真成形几何精度的影响机制，采用熵值法确定最佳工艺参数组合。结果 通过实际成形实验对比分析，在不同成形条件下，有限元仿真结果与实际加工结果高度吻合，两者之间的加工误差不超过2%，针对规格为32 mm 2 mm的20号碳钢管材，当轴向推进速度为5 mm/s，管材与弯曲模间隙值为0.25 mm时加工精度最高。结论 优化改进后的有限元仿真模型具有较高的几何成形精度，可有效指导实际成形工艺参数的优化工作。 |
| 英文摘要: |
| The establishment of high precision finite element simulation model can effectively guide the actual machining production, reduce the experimental cost and parts manufacturing development cycle, and improve the forming efficiency. The work aims to improve the geometric machining accuracy of metal tube plane bending forming in numerical simulation, explore the influence law of key process parameters on geometric accuracy, and determine the optimal combination of process parameters. With tube plane bending forming components as the research object, a finite element simulation model based on free bending technology was established and the accuracy was verified by actual processing experiments and the errors of the simulation model were compensated. With the data obtained from the high accuracy simulation model as the data source, the influencing mechanism of key process parameters on the geometric accuracy of simulated forming was investigated, and the entropy value method was used to determine the optimal combination of process parameters. Finally, through the comparative analysis of the actual forming experiment, the results showed that under different forming conditions, the finite element simulation results were highly consistent with the actual machining results, and the machining error between the two was less than 2%. The highest machining accuracy was achieved when the axial propulsion speed was 5 mm/s, the clearance between the tube and the bending die was 0.25 mm for a 32 mm×2 mm 20 gauge carbon steel tubes. The improved finite element simulation has high forming geometric accuracy, which can effectively guide the optimization of actual forming process parameters. |
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