基于变压边力协同可控拉深筋技术控制板金回弹机理研究

项目名称： 基于变压边力协同可控拉深筋技术控制板金回弹机理研究

项目编号： No.51305241

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 苏春建

作者单位： 山东科技大学

项目金额： 25万元

中文摘要： 钣金冲压件高精密成形要求对钣金件成形过程中的回弹进行控制，如何精确预测回弹并对其控制是高性能精确成形制造学科亟需解决的科学问题之一。变压边力技术为控制板材回弹的一项有效措施，可以对冲压件塑性成形的材料流动进行限流或开流，但其只能对冲压件全局进行控制，而较复杂的钣金件成形需要局部进行限流或开流，才能较好地控制板材的回弹。本项目提出通过变压边力协同可控拉深筋来控制回弹，是在压边圈四周放置电动可调阶梯拉深筋，在改变压边力的同时根据冲压件的需要在线调整拉深筋的高度，从而控制板材成形质量。项目拟对阶梯拉深筋对冲压件成形质量的影响规律进行研究，探索拉深筋高度、形状、尺寸，模具参数、板材参数和工艺参数等因素对回弹的影响规律，建立在线调整拉深筋高度形成的阶梯拉深筋系统，对冲压件的回弹进行预测和控制。项目的研究为工程应用提供可靠的理论依据，对冲压件精确成形精度和效率的提高有着重要意义。

中文关键词： 钣金成形；变压边力；可控拉深筋；回弹；

英文摘要： Springback of sheet matal must be controlled during the high precision forming process,While, how to accurately predict and control springback is one of the urgent scientific problem to be solved.Variable blank holder force technology is an effective measure to control sheet metalspringback, which can current limit or open material flow during the process of stamping plastic forming, but it only overall control the stampings, more complex sheet metal stamping need local current limit or open flow to better control the springback of the plate. The project was put forward through the variable blank-holder force and controllable drawbead to control springback, which is place electric adjustable step drawbead around the blank holder, and change the blank-holder force at the same time online adjust the height of the drawbead according to the needs of the stamping, so as to control the quality of sheet forming. To predict and control the springback of stamping parts, the project plan to research the influence law of the step drawbead on stamping forming quality, explore the effect rule of the drawbead height, shape, size, mould parameters, plate parameters and process parameters on springback, and establish step drawbead system composed of online adjustment drawbead height . The project has important significance on p

英文关键词： Sheet metal forming；Variable blank holder force；Controllable drawbead；Springback；