Cutting by laser-induced shock waves

激光诱导冲击波切割

• 批准号: 289438332
• 负责人: Professor Dr.-Ing. Frank Vollertsen
• 金额: --
• 依托单位: BIAS - Bremer Institut für Angewandte Strahltechnik GmbH
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/289438332?language=en
• 关键词: Cutting; laser; induced; shock; waves

In cutting or punching, the geometric accuracy of the tools and their positioning relative to each other becomes increasingly important as the process dimensions decrease. Ensuring a very precise cutting clearance between the punch and die is a particular challenge in the processing of metallic foil materials in the micro range. The "laser shock-cutting" method offers a solution, particularly in the area of small process dimensions because it provides an approach for process simplification. Compared to mechanical cutting, laser shock-cutting dispenses with the problem of tool positioning because either the punch or die is replaced by a laser-induced shock wave. For establishment of this process, knowledge of the relevant parameters and the process boundaries is necessary. The aim of the proposed research project is therefore to understand how the foil thickness, workpiece material, and grain size affect both the cut-edge geometry and achievable cutting quality. The working hypothesis intended to be verified is that the ductility decreases with a decreasing number of grains over the foil cross-section and at the same time, the separability of the material is improved in laser shock cutting.

在切削或冲压中，随着加工尺寸的减小，刀具的几何精度及其相对位置变得越来越重要。确保冲头和冲模之间非常精确的切割间隙是加工微小范围内金属箔材料的一个特殊挑战。“激光冲击切割”方法提供了一种解决方案，特别是在小工艺尺寸领域，因为它提供了一种简化工艺的方法。与机械切割相比，激光冲击切割免除了工具定位的问题，因为冲头或模具被激光诱导的冲击波所取代。为了建立该过程，需要了解相关参数和过程边界。因此，拟议的研究项目的目的是了解箔厚度，工件材料和晶粒尺寸如何影响切割边缘的几何形状和可实现的切割质量。要验证的工作假设是，随着箔横截面上晶粒数量的减少，延展性降低，同时，在激光冲击切割中，材料的可分离性得到改善。

项目成果

Laser shock punching: principle and influencing factors

• DOI: 10.1007/s11740-019-00886-3
• 发表时间: 2019-06-01
• 期刊: PRODUCTION ENGINEERING-RESEARCH AND DEVELOPMENT
• 影响因子: 1.7
• 作者: Fenske, H.;Vollertsen, F.
• 通讯作者: Vollertsen, F.