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Surface integrity of laser prepared cutting edges

激光加工切割边缘的表面完整性

基本信息

批准号：
319868306
负责人：
Professor Dr.-Ing. Jan C. Aurich
金额：
--
依托单位：
Lehrstuhl für Fertigungstechnik und Betriebsorganisation (FBK)
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 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/319868306?language=en
关键词：
Surface integrity laser prepared cutting

项目摘要

The performance of cutting tools is considerably affected by the micro geometry of the cutting tool. Current demands on the technique used to prepare the cutting edge with regard to the accuracy of the manufactured micro geometry and the surface integrity of the cutting edge are difficult to be met. Laser technology allows the machining of tool micro geometries with high accuracies. However, the surface integrity of such tool micro geometries often does not cover the demands, such as low tensile stresses and the prevention of voids. In this proposal, the surface integrities of laser prepared cutting edges of cemented carbide indexable inserts used for turning will be investigated. The percentage of the binder phase, the size of the tungsten carbide and important laser- and process parameters will be varied to prepare the cutting edges. Different settings will be used to evaluate the effect of specific laser parameters (e.g. the pulse duration, wavelength or pulse repetition frequency), process parameters (e.g. the temporal or spatial pulse overlap) and the composition of the cemented carbide on the surface integrity of the cutting edges after laser machining. Thus, appropriate strategies for the laser preparation of cutting edges can be derived for specific cemented carbides. Finally, laser prepared cutting edges will be used for external cylindrical turning. The preparation strategies for these indexable inserts will be different. Effects of the preparation strategy on the performance of the indexable inserts can thus be evaluated. A phenomenological model will be developed in order to summarize the results. The results of the proposal enhance the performance of indexable inserts by using laser technology for the preparation of cutting edges.

切削刀具的微观几何形状对切削刀具的性能有很大的影响。目前对用于制备切削刃的技术在所制造的微几何形状的精度和切削刃的表面完整性方面的要求难以满足。激光技术允许以高精度加工刀具的微小几何形状。然而，这种工具微几何形状的表面完整性通常不能满足要求，例如低拉伸应力和防止空隙。本文对车削用硬质合金可转位刀片的激光切削刃表面完整性进行了研究。粘结相的百分比、碳化钨的尺寸以及重要的激光和工艺参数将被改变以制备切削刃。将使用不同的设置来评估特定激光参数（例如脉冲持续时间、波长或脉冲重复频率）、工艺参数（例如时间或空间脉冲重叠）和硬质合金成分对激光加工后切削刃表面完整性的影响。因此，可以为特定的硬质合金导出用于激光制备切削刃的适当策略。最后，激光制备的切削刃将用于外圆车削。这些可转位刀片的准备策略将有所不同。因此，可以评估准备策略对可转位刀片性能的影响。为了总结结果，将开发一个现象学模型。该提案的结果通过使用激光技术制备切削刃来提高可转位刀片的性能。