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In this work, the influence of electrode surface patterning on shape evolution in through-mask electrochemical micromachining (EMM) process is investigated numerically and experimentally. With finite element method, the anodic dissolution process is predicted and the etching behavioral trends under various parameters involving spacing and opening ratio, mask aspect ratio, and the etched feature aspect...
Constraint screw and DOF to single opened chain PRC, RPS and CPS were analyzed, type synthesis to lower-mobility parallel robot mechanisms based on single-opened-chain RPC, RPS and CPS were carried out by screw theory and single-opened-chain type synthesis method. As a result, some new-style parallel robot mechanisms with three, four or five DOF were presented. By analyzing the kinematic output characteristic...
Lower mobility parallel robot mechanisms have become analysis hotspot in the field of parallel robot mechanisms because of the characteristics of simple structure, lower price and easy control, they have good prospect in industrial application. In this paper, a new symmetric 3-PCR parallel robot mechanism was designed according to screw theory and single opened chain type synthesis method. On the...
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