Minimization of torsion vibrations at deep-drilling tools through glued joints with defined damping

通过具有确定阻尼的胶合接头最大限度地减少深钻工具的扭转振动

• 批准号: 240919758
• 负责人: Professor Dr.-Ing. Uwe Heisel
• 金额: --
• 依托单位: Institut für Werkzeugmaschinen (IFW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/240919758?language=en
• 关键词: Minimization; torsion; vibrations; deep; drilling

Gun drilling is a deep hole drilling method often used owing to the attainable machining quality. Torsional vibrations, limiting the productivity of the process, may however arise especially at high feed rates due to the slim geometry of the tools. Hence, the development of suitable dampers is still being worked on to increase the productivity of the process. Previous developments, however, could not gain acceptance on the market. The reasons for that are, among other things, the limited effectiveness of some dampers or in the case of controlled systems, their high costs as well as their complexity.Preliminary tests showed that bonded instead of soldered interfaces between the clamping sleeve and the shank of the tool may have a damping and therefore positive influence on the dynamic stability of the tool. The aim of this project is to systematically assess the static and dynamic behaviour of bonded gun drilling tools and their effects on the drilling process as well as the resulting machining quality. Another aim is to create a finite elements model of the bonded tools for examining and predicting the damping and its effects on the process, depending on the characteristics of the adhesive as well as the thickness of the adhesive layer. In addition, the damping mechanisms occurring for different types and kinds of adhesives will be identified to facilitate a specific optimisation. Altogether five different adhesives (anaerobic adhesive, one-component as well as two-component epoxy resin adhesives) by different manufacturers will be used for this.

枪钻加工是一种常用的深孔加工方法，由于可以达到加工质量。然而，由于工具的细长几何形状，特别是在高进给速率下，可能会出现限制工艺生产率的扭转振动。因此，仍在开发合适的阻尼器以提高该过程的生产率。然而，以前的发展不能获得市场的接受。原因之一是某些阻尼器的有效性有限，或者在受控系统的情况下，其成本高且复杂。初步测试表明，夹紧套筒和刀具柄之间的粘合而非焊接界面可能具有阻尼，从而对刀具的动态稳定性产生积极影响。该项目的目的是系统地评估粘结枪钻刀具的静态和动态行为及其对钻孔过程和加工质量的影响。另一个目的是创建粘合工具的有限元模型，用于检查和预测阻尼及其对工艺的影响，具体取决于粘合剂的特性以及粘合剂层的厚度。此外，将确定不同类型和种类的粘合剂的阻尼机制，以促进特定的优化。为此，将使用不同制造商生产的总共五种不同的粘合剂（厌氧粘合剂、单组分和双组分环氧树脂粘合剂）。