Local heating in robot-based incremental sheet metal forming

基于机器人的增量金属板材成形中的局部加热

基本信息

批准号：
186246236
负责人：
Professor Dr.-Ing. Bernd Kuhlenkötter, since 9/2016
金额：
--
依托单位：
Lehrstuhl für Produktionssysteme
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/186246236?language=en
关键词：
Local heating robot based incremental

项目摘要

The term Roboforming describes a robot-based incremental sheet metal forming process in which two cooperating industrial robots form a sheet metal by repeated localized forming with two simple and workpiece-independent tools. This kinematically controlled forming process can be used for a fast and cost efficient production of sheet metal prototypes or parts in small lot sizes.The aim of the first funding period was to increase geometrical accuracy and to reduce springback and subsequent deformation of already formed areas for simple part geometries. Therefore the forming machine had to be upgraded with a system for localized resistance heating of the moving incremental forming zone. It was proven that with this incremental heating method a reduction of the forming forces according to flow curves at elevated temperatures known from other forming and heating processes can be achieved qualitatively in steel forming. Also a reduction of subsequent deformation was achieved. Within this first funding period the upgrade of the forming machine was designed and implemented. According to this the phenomenological basics, the design and engineering of forming tools with inner cooling and further cooling systems, an implementation of highly dynamic temperature measurement and control and the start of operation of the facility was achieved. Additionally stable process conditions for the heating process were identified. Also the process-specific factors of influence, their interdependencies and their relationship to the target factors of the process should be investigated and optimized.The aim of this new project is to overcome existing constraints of incremental sheet metal forming by forming at elevated temperatures. Therefore both temperature measurement and control will be optimized for more complex parts. According to the achievable geometrical accuracy when forming at elevated temperatures, geometrical deviations resulting of the heating shall be compensated.Within this second funding period, especially materials which are hard to form at room temperature shall be focussed. Within this material range forming of titanium and Complexphase-steel will be realized and the influence of this forming process on the material properties will be analysed. In incremental sheet metal forming the maximum formable sheet thickness very often is limited. For steel forming an investigation of the influence of this process variant on sheet thickness restrictions will be carried out. With this research programme, further fields of application for incremental sheet metal forming will be made accessible.

术语RoboForming描述了一个基于机器人的增量钣金形成过程，其中两个合作的工业机器人通过重复使用两个简单和工件独立的工具来形成钣金。这种运动控制的形成过程可用于快速且具有成本效率的金属原型或小尺寸的零件的生产。第一个资金时期的目的是提高几何准确性，并减少春回和随后形成的简单零件几何形成区域的变形。因此，必须使用一个系统升级成型机，以用于移动增量形成区的局部电阻加热。事实证明，使用这种增量加热方法，可以根据钢形成在定性的质量上实现从其他形成和加热过程中升高的温度下的流动曲线减少形成力。还减少了随后的变形。在第一个融资期内，设计和实施了组装机的升级。据此，现象学基础知识，具有内部冷却和进一步冷却系统的形成工具的设计和工程，实现了高度动态的温度测量和控制以及设施的运行开始。另外，还确定了加热过程的稳定过程条件。同样，应研究和优化特定过程的影响因素，它们的相互依存关系及其与过程因素的关系。该新项目的目的是克服通过在升高温度下形成形成的增量钣金形成的现有限制。因此，将对更复杂的零件进行优化的温度测量和控制。根据在升高温度下形成的几何准确性，应补偿导致加热的几何偏差。在第二个资金期间，尤其是在室温下很难形成的材料。在此材料范围内，将实现钛和复合实体 - 钢的形成，并将分析这种形成过程对材料特性的影响。在增量的钣金中，形成最大形成板的厚度经常受到限制。对于钢，将对该过程变体对板厚度限制的影响进行研究。通过此研究计划，将使进一步的增量钣金形成申请领域可访问。