By Pierre Lambert
Capillary Forces in MicroassemblyВ discusses using capillary forces as a gripping precept in microscale meeting. sincerely written and well-organized, this article brings togetherВ physical conceptsВ at the microscale with useful purposes in micromanipulation. all through this paintings, the reader will discover a assessment of the prevailing gripping rules, parts to version capillary forces in addition to descriptions of theВ simulation and experimental attempt benchВ developed to review the layout parameters. utilizing recognized recommendations from floor technological know-how (such as floor rigidity, capillary results, wettability, and get in touch with angles) as inputs to mechanical types, the volume of attempt required to address micro-componentsВ isВ predicted. those advancements areВ then appliedВ in a case studyВ concerningВ the decide and position of ballsВ in aВ watch ball bearing.
Researchers and engineers curious about micromanipulation and precision meeting will locate this a hugely worthwhile reference forВ microassembly procedure layout and analysis.
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Additional info for Capillary Forces in Microassembly: Modeling, Simulation, Experiments, and Case Study
The ﬁrst reason for a theoretical modeling is that even if these eﬀects can be measured with adapted force sensors such as AFM, they cannot be separated from other contributions (all forces contribute to the global measured force amount). A model is therefore necessary to discriminate each contribution. The second justiﬁcation is that we intended to investigate the inﬂuence of a large number of parameters before setting up a experimental validation. Consequently, these eﬀects have ﬁrst been assessed by simulation.
Moreover, the study of the capillary force is a good way to enter the microworld because it is involved at many scales from the nanoscale (capillary condensation) up to the submillimetric scale. This will be discussed again in the chapter devoted to the capillary forces. ], material characteristics and sensitivity to environmental conditions (for example, UV radiation), mechanical properties, roughness characteristics (Ra ), physical properties, clean room related aspects. Shape Memory Alloy. 1 µN , 1 mN , 2–5 N  None None Condition on the refractive index  11 Standing waves 12 Squ.
The results are given as a function of the geometry ratio, and seem to be independent from the actual size. A second example, a micromanipulation driven by the electrostatic force is presented in  and shown in Fig. 2). The authors described the handling of insulating objects: the gripping, the centering, the moving, and the releasing tasks are performed by controlling the electrostatic force. It turns out that the humidity rate greatly inﬂuences the reliability of this kind of electrostatic gripper.
Capillary Forces in Microassembly: Modeling, Simulation, Experiments, and Case Study by Pierre Lambert