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.

枪支钻探是一种经常使用的加工质量，通常使用的深孔钻井方法。然而，由于工具的几何形状，扭转振动限制了过程的生产力，尤其是在高饲料速率下产生的。因此，仍在开发合适的阻尼器以提高过程的生产率。但是，以前的事态发展无法在市场上获得接受。此外，原因是某些阻尼器或受控系统的有限有效性，它们的高成本以及它们的复杂性。原始测试表明，粘结而不是夹紧套筒和工具柄之间的焊接而不是焊接界面，因此可能具有阻尼，因此对工具的动态稳定性具有积极影响。该项目的目的是系统地评估粘合枪钻孔工具的静态和动态行为及其对钻井过程的影响以及所得的加工质量。另一个目的是创建一个有限的元素模型，以检查和预测阻尼及其对过程的影响，具体取决于粘合剂的特征以及粘合剂层的厚度。此外，将确定针对不同类型和类型的粘合剂的阻尼机制，以促进特定的优化。总共将使用五种不同的粘合剂（厌氧粘合剂，一组分以及两分量的环氧树脂胶粘剂）。