Study and buildup of a decision matrix for selection and design of micro machining clamping systems - Development and study of universally usable hybrid micro clamping systems

根据以前的研究和第一个资助期的结果，由于这些系统所基于的夹紧方法的各种缺点，众所周知的微型夹紧系统不可能得到普遍使用。例如，虽然机械装夹具有装夹时间短、装夹刚度高、自动化能力强、资本和运营成本低的特点，但由于存在损坏的风险，软件和薄壁零件都不能被修复。蜡夹持力非常大，可以可靠地夹紧各种微小零件，而不会损坏它们。然而，由于工件的热膨胀和漂浮，如果没有特殊的定位系统，这种方法很难保证足够的夹紧精度用于微加工。此外，蜡夹紧比机械夹紧的夹紧时间长得多。所有这些都会导致额外的时间和成本，并使得仅对小批量有效地使用该方法成为可能。本项目的目标是开发和研究新的、通用的、混合的微夹紧系统。本项目的目标是开发和研究新的、通用的、混合的微夹紧系统，一方面实际地利用在第一个资助期内获得的关于用于微加工的已知夹紧装置的性能和适用性的知识，另一方面，获得关于未知或未被研究的混合微夹紧装置的行为和特性的新的基本知识。新型混合微夹紧系统将通过组合基于材料、力或形状的各种众所周知的夹紧方法来开发，包括用冰、蜡、这种传统方法的组合应该同时使用它们的不同优点，例如可靠且无损伤的工件夹持和具有高精度和重复性的固定，和/或弥补它们的缺点，例如增加夹紧刚度。然而，这一点必须通过对这些混合微夹紧系统的性能的理论和实验研究来验证。将在这些研究期间获得的基本知识将被纳入在第一个供资期间创建的数据库系统。

According to the results of the previous studies and the 1st funding period, a universal usage of the well-known micro clamping systems is not possible due to various disadvantages of the clamping methods, on which these systems are based. For example, though the mechanical clamping, which shows a very short clamping time, high clamping stiffness and automation capability, as well as low capital and operating costs, nether soft nor thin-walled workpieces can be fixed because of the risk of their damage. The wax clamping allows to achieve very high holding forces and to clamp various micro workpieces reliably and without their damage. However, it is hardly possible with this method to ensure a clamping accuracy sufficient for micromachining without special positioning systems due to the thermal expansion and floating of the workpiece. In addition, the clamping with wax shows much longer clamping times than the mechanical clamping does. All this results in an additional time and costs and makes an efficient usage of this method only for small batches possible. Hence, there is a need for a universally usable micro clamping system.The goal of this project is the development and study of new, universally usable, hybrid micro clamping systems, on the one hand, to use practically the knowledge about the properties and suitability of the known clamping devices for micromachining, which were obtained during the 1st funding period and, on the other hand, to obtain new fundamental knowledge of the behavior and properties of unknown or not studied, hybrid micro clamping devices.The novel hybrid micro clamping systems are to be developed through a combination of various, well-known clamping methods based on material, force or form closures, including the clamping with ice, wax, glue, vacuum, chuck jaws etc. This combination of the conventional methods should result in a simultaneous usage of their different advantages, such as a reliable and damage-free workpiece clamping and a fixation with a high accuracy and repeatability, and/or in a compensation of their disadvantages, such as an increase in the clamping stiffness. However, this must be verified through theoretical and experimental studies of the properties of these hybrid micro clamping systems. Fundamental knowledge, which will be obtained during these studies, is to be implemented into the database system created during the 1st funding period.