拼焊板盒形件拉深成形理论与控制技术的研究

项目名称： 拼焊板盒形件拉深成形理论与控制技术的研究

项目编号： No.51275444

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 官英平

作者单位： 燕山大学

项目金额： 80万元

中文摘要： 拼焊板拉深成形最突出的问题是法兰和侧壁（对于盒形件等）起皱及侧壁破裂，能否对起皱和破裂进行实时控制是其能否顺利成形的关键。与单板成形相比，由于料厚比、材质、焊缝性能、热影响区以及成形过程中焊缝移动的影响，使拼焊板成形过程更为复杂。而当前汽车工业对拼焊板拉深件的需求日益增加，而且生产过程中依然存在很多亟待解决的问题。针对这一现状，拟开展拼焊板盒形件拉深成形理论及控制技术研究。通过解析法建立综合考虑起皱和破裂的拼焊板盒形件拉深成形极限图和焊缝移动模型，建立完整的可预测拼焊板拉深成形最佳压边力的力学模型。结合力学模型和拉深初期宏观物理量（拉深力、拉深行程、压边力等）的监测，实现对最佳压边力的实时控制，从而实现对成形过程中起皱、破裂及焊缝移动的实时控制，可获得高精度的拉深件，对推动拼焊板冲压件在汽车车身制造业中更为广泛的应用将有重要的意义。

中文关键词： 拼焊板盒形件；成形极限；焊缝移动；人工神经网络；实时控制

英文摘要： The main problem of tailor welded blank deep drawing is the flange wrinkling and sidewall (box-shaped, etc.) wrinkling and rupture, so the possibility of real-time control for sheet metal wrinkling and rupture is the key of the deep drawing process. Due to the influence of weld-line movement, different material thickness and material property, weld properties, heat affected zone and the forming process, tailor welded blank forming process is more complex compared with single sheet metal forming process. At present, tailor welded blank deep drawing part is needed more and more,but there are also some problems in the production. so it is necessary to study tailored welded blanks box-shaped deep drawing process theory and control technology. The best prediction of blank holder force is created by forming limit diagram and the movement model of weld line, Combined with mechanics and initial macroscopic physical quantities (drawing force, drawing stroke, the blank holder force, etc.), is monitored by the control system, the mateial property of tailor welded blanks is identified by the module of BP neural network, the identified material property is used to predict the required best blank holder force in deep drawing. The optimal blank holder force is controled by the control system to get the best quality of tailor

英文关键词： tailor welded blanks box shape parts；forming limited diagram；weld line movement；artificial neural network；real-time control