复杂曲面热辅助渐进弯曲智能成形设备及工艺研究  

Research on heat-assisted incremental bending intelligent forming equipments and technology for complex curved surfaces

作　　者：魏波 郭晓莹 张飞飞 阎汉生[1] 何凯[2,3] 李峥 WEI Bo;GUO Xiaoying;ZHANG Feifei;YAN Hansheng;HE Kai;LI Zheng(School of Mechanical and Electrical Engineering,Guangdong Polytechnic of Industry and Commerce,Guangzhou 510510,China;Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;Shenzhen Key Laboratory of Precision Engineering,Shenzhen 518055,China;Department of Surgery,The Chinese University of Hong Kong,Hong Kong SAR 999077,China)

机构地区：[1]广东工贸职业技术学院机电工程学院,广州510510 [2]中国科学院深圳先进技术研究院,深圳518055 [3]深圳市精密工程重点实验室,深圳518055 [4]香港中文大学医学院,中国香港999077

出　　处：《现代制造工程》2022年第9期72-81,共10页Modern Manufacturing Engineering

基　　金：国家自然科学基金青年基金项目(52105414);广东普通高校重点领域项目(2019KZDZX1043);广东大学生科技创新培育专项资金资助项目(pdjh2021a0741)。

摘　　要：3D自由复杂曲面的中厚板成形一直是金属成形领域的瓶颈。介绍一种成形力小、成形效率和精度高的复杂曲面热辅助渐进弯曲成形工艺。利用最小能量原理,通过渐进的方式对金属板材进行弯曲成形,最大限度地减小了成形力;采用基于计算机视觉技术的无模型智能控制,对成形后的金属板材进行偏差补偿,确保工件的尺寸精度;通过局部加热的方式减小回弹和增大金属板的成形极限。该工艺分别成形了单曲率金属板、变曲率金属板和双曲率金属板。实验结果表明:热辅助渐进弯曲成形工艺加工复杂曲面板材平均成形偏差小于3mm,平均加工时间小于20 min,与现有方法相比,该方法具有简单、快速和高效等优点。Three-dimensional free complex curved surfaces medium thick plate forming is always a bottleneck in metal forming field.A heat-assisted incremental bending process for complex curved surface with low forming force,high forming efficiency and high precision was introduced.By using the principle of minimum energy,the metal plate was bent in a gradual way to reduce the forming force for the most part.The model-free intelligent control based on computer vision technology was adopted to compensate the errors of the metal plate after forming and ensure the dimensional accuracy of the workpiece.By means of local heating,the springback was reduced and the forming limit of metal plate was increased.The process can form the single curvature metal plate,the variable curvature metal plate and the double curvature metal plate.The experimental results show that heat-assisted incremental bending method form complex curved plate,whose the forming average error is less than 3 mm and the average processing time is less than 20 minutes,compared with the existing methods,this method has the advantages of simple,rapidity and efficiency.

关 键 词：复杂曲面 最小能量 无模型智能控制 成形极限 

分 类 号：TG306[金属学及工艺—金属压力加工]