Process limits for incremental flanging and hole flanging operations using a CNC controlled forming tool

使用 CNC 控制成型工具进行增量翻边和孔翻边操作的工艺限制

基本信息

批准号：
208824065
负责人：
Professor Dr.-Ing. Gerhard Hirt
金额：
--
依托单位：
Departement Maschinenbau und Verfahrenstechnik
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 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/208824065?language=en
关键词：
Process limits incremental flanging hole

项目摘要

Incremental sheet forming (ISF) offers a set of technological advantages and potentials. These include low part specific tooling, high flexibility due to short ramp up times and increased forming limits. Especially the recently developed process combinations (e.g. the combination of stretch forming and ISF) offer the possibility of low cost production of complex sheet metal parts meeting low tooling demand and reduced process times. Thus, the technological progress has reached a state that requires investigations of the complete process chain. Beside the primary forming and trimming steps finishing operations, such as flanging and hole flanging for the introduction of functional elements, are part of the complete manufacturing process. Therefore systematic studies on the application of ISF for forming of these elements are carried out within this work. The overall objective of the project is to explore the fundamentals of flanging as well as hole flanging operations by ISF and to enable the technological requirements for the use of these finishing operations by ISF. In the first project period a basic understanding of the process has been established. Individual influences of single process parameters was considered and analysed. It was shown that the incremental forming character allows (significant) extension of known process limitations of conventional forming operations. In the proposed research period the compiled knowledge is to be made accessible in a commonly applied CAM tool. A direct implementation of the follow-up operations in the computer aided manufacturing (CAM) routine is a requirement for an efficient use of the shown technology potentials. Furthermore, the achievable hole flange properties are to be optimized with respect to the resulting geometrical accuracy. To fully utilize the demonstrated potential of incremental hole flanging operations it is mandatory to meet the geometrical accuracy (wall angle of 90°). Additionally the influence of pre-forming steps is to be analysed. Therefore it is to be examined to what extent the identified high forming limits are transferable to a subsequent processing of preformed components. Finally, the obtained results are transferred to a complex application component.

渐进式板材成形 (ISF) 具有一系列技术优势和潜力，其中包括零件专用模具少、由于升温时间短而具有高灵活性以及增加的成形限制，尤其是最近开发的工艺组合（例如拉伸成形和 ISF 的组合）。）提供了复合材料钣金零件的低成本生产的可能性，满足低模具需求和减少加工时间，因此，除了主要成型和修整步骤精加工操作之外，技术进步已经达到了需要研究完整工艺链的状态。例如用于引入功能元件的翻边和孔翻边是完整制造过程的一部分，因此，本项目的总体目标是探索 ISF 成形的基本原理。 ISF 的翻边和孔翻边操作，并满足 ISF 使用这些精加工操作的技术要求，在第一个项目期间，已经考虑并确定了对工艺的个人影响。分析了。结果表明，渐进成形特性可以（显着）扩展传统成形操作的已知工艺限制，在拟议的研究期间，可以在常用的 CAM 工具中直接实现后续的应用。计算机辅助制造 (CAM) 例程中的要求是有效利用所显示的技术潜力，此外，要根据最终的几何精度来优化可实现的孔法兰属性，以充分利用增量的潜力。孔翻边操作必须满足几何精度（壁角为 90°）。此外，还需要分析预成型步骤的影响，因此需要检查确定的高成型极限在多大程度上可转移到预成型部件的后续加工。，获得的结果被传输到复杂的应用程序组件。