In situ punch wear measurement in a blanking tool, by means of thin layer activation
In situ punch wear measurement in a blanking tool, by means of thin layer activation
复制标题
通过薄层激活在冲裁工具中进行原位冲头磨损测量
DOI：
10.1016/j.wear.2007.12.014
复制
发表时间：
2008
期刊：
影响因子：
5
通讯作者：
X. Roizard
中科院分区：
文献类型：
--
作者：
G. Monteil;F. Gréban;X. Roizard
提高引线框冲裁行业的生产率是其竞争力的关键。因此，研究人员面临的挑战涵盖了广泛的科学领域（材料、润滑、工艺等）。其中，冲头耐磨性的提高是冲裁工艺中最重要的参数之一。因此，对凸模磨损的认识是本文的主题。由于冲裁压力机冲裁模间隙对中对毛刺量的影响很大，因此在不拆卸工具的情况下直接测量冲裁压力机中的冲裁模磨损是至关重要的。本文介绍了一种直接测量凸模磨损量的新方法--选择性激活技术。借助于这种技术，已经建立了活动损失与冲头上的磨损体积之间的精确关系。此外，该方法允许冲裁工艺参数的影响，如润滑或冲裁材料的性质，被真实的时间量化。用这种方法测得的磨损体积已经通过在完成大量冲裁零件后进行的磨损冲头的轮廓测量来证实。这些几何结果与选择性激活技术表现出良好的一致性。
The improvement in the productivity of the leadframe blanking industry of is a key for its competitiveness. Consequently the challenge for researchers covers a wide range of scientific areas (materials, lubrication, process, etc.). Among others the improvement of the punch wear resistance is one of the most important parameters in the blanking process. Consequently punch wear understanding is the topic of this paper. Because of the strong influence of the centering of the punch-die clearance upon the burr amount, it is crucial to directly measure punch wear in the blanking press without disassembling the tool. In this paper a new method for a direct measurement of the punch wear, selective activation technique, which has never been applied in the field of blanking is described. With the help of this technique, a precise relation between the loss of activity and the worn volume on the punch has been established. In addition this method allows the influence of the blanking process parameters, like lubrication or nature of the blanked material, to be quantified in real time. The measured wear volumes by this method have been confirmed by means of measurements of the profile of the worn punch carried out after completion of a large amount of blanked parts. These geometrical results exhibit a good agreement with the selective activation technique.