Productivity increase in tool grinding with the help of a "sensing" spindle

借助“传感”主轴提高刀具磨削的生产率

• 批准号: 417859800
• 负责人: Professor Dr.-Ing. Berend Denkena
• 金额: --
• 依托单位: VOLLMER WERKE Maschinenfabrik GmbH
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/417859800?language=en
• 关键词: Productivity; increase; tool; grinding; help

Currently, axial slots in cemented carbide milling cutters and drills are machined using creep grinding operations (peripheral longitudinal grinding). As a result of the process forces and limited stiffness of the workpiece, significant displacement occurs between the workpiece and the grinding wheel. Minimizing the displacement requires a time-consuming set-up process with and without the use of a steady rest. The aim of the proposed project is to minimise the displacement and shorten the set-up time by eliminating the steady rest. Therefore, a displacement compensation is developed, which compensates the displacement occurring in the process. For this purpose, a force sensor system is developed which is installed in the workpiece spindle and measures the acting process forces. Rigidity models and automated measuring cycles are used to calculate the displacements caused by the process forces to compensate them by use of machine axes as part of online compensation. Thus, the productivity is significantly maximized, especially for small batch sizes. Furthermore, raw material is saved by minimizing rejects.

目前，硬质合金铣刀和钻头中的轴向槽是通过缓进磨削操作(圆周纵向磨削)加工的。由于加工力和工件的有限硬度，在工件和砂轮之间会产生很大的位移。最大限度地减少位移需要耗时的设置过程，无论是否使用稳定的支撑件。拟议项目的目的是通过消除稳定的休息来最大限度地减少位移并缩短安装时间。因此，研制了一种位移补偿方法，对加工过程中产生的位移进行补偿。为此，研制了一种安装在工件主轴上的力传感器系统，用于测量作用力。刚性模型和自动测量周期用于计算过程力引起的位移，通过使用机床轴进行补偿，作为在线补偿的一部分。因此，生产率显著地最大化，尤其是对于小批量。此外，通过将废品率降至最低，节省了原材料。