Variable stiffness probing systems for micro-coordinate measuring machines
Variable stiffness probing systems for micro-coordinate measuring machines
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DOI：
10.1016/j.precisioneng.2015.08.004
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发表时间：
2016
影响因子：
3.6
通讯作者：
Khalid Alblalaihid;S. Lawes;P. Kinnell
中科院分区：
文献类型：
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作者：
Khalid Alblalaihid;S. Lawes;P. Kinnell
微尺度探测系统用于专业的微坐标测量机上，用于测量小型、复杂和易碎的部件。探头刚度是微尺度探测系统的一项重要性能。它影响接触力，坚固性，易于制造，精度和动态响应。因此，选择最佳刚度是一项重大的设计挑战，并且经常导致不希望的妥协。例如，当接触易碎表面时，探头刚度应低，以防止损坏；然而，对于一个更健壮的探测系统，刚度应该增加。本文提出了一种微尺度探测系统的新概念，该系统能够在使用过程中快速方便地改变和控制探头刚度。首先解释了使用所提议的探针的预期策略。然后通过有限元分析和实验结果的结合，对新概念进行了充分的定义和探索。描述了两种可能的探针配置，并对每种配置的预测性能模型进行了介绍和比较。这些模型表明，采用所提出的概念可以显著降低刚度，并表明在理论上可以实现具有完美同位素刚度的探测系统。
Micro-scale probing systems are used on specialist micro-coordinate measuring machines to measure small, intricate and fragile components. Probe stiffness is a critical property of micro-scale probing systems; it influences contact force, robustness, ease of manufacture, accuracy and dynamic response. Selecting the optimum stiffness, therefore, represents a significant design challenge, and often leads to undesirable compromises. For example, when contacting fragile surfaces the probe stiffness should be low to prevent damage; however, for a more robust probing system the stiffness should be increased. This paper presents a novel concept for micro-scale probing systems with the ability to quickly and easily change and control probe stiffness during use. The intended strategy for using the proposed probe is first explained. Then the new concept is fully defined and explored through a combination of finite element analysis and experimental results. Two possible configurations of probe are described, and models for predicted performance for each are presented and compared. The models demonstrate significant stiffness reduction is possible with the proposed concept, and show it is theoretically possible to achieve a probing system with perfectly isotopic stiffness.