The Systematic Design of Link-Type Optical Fiber Polisher with Single Flat

摘要

The mechanical device of optical fiber polisher for polishing the end-face of optical connector can be roughly divided into the planetary-gear-type mechanism and the link-type mechanism. This paper focuses on the design of link-type optical fiber polishers. 1999, Buzzetti proposes an optical fiber polisher which is a link-type mechanism with double flats which is the key point of the patent. Buzzetti's optical fiber polisher, which is consist of 7 links and 8 joints and with 2 degrees of freedom, produce 8-shaped polishing traces to polish the end face of optical connector. The purpose of this paper is to synthesize link-type mechanisms with single flat to avoid the patent of Buzzetti's mechanism. First, according to the Yan's creative design methodology, we synthesize 10 new feasible link-type optical fiber polishers. Then, we value the design concepts and propose 2 most feasible new designs with single flat. The most feasible mechanism for optical fiber polisher is double-crank mechanism with single flat. According to vector loop equations, we derive the equations of polishing trace, velocity, acceleration, and curvature of this new optical fiber polisher. Finally, we take the curvature scope percentage (K_(SP)) and the velocity deviation percentage (V_(dp)) as the objective functions, and use global search to achieve optimum design so that the link-type mechanism with single flat will produce the optimum polishing trace which is like the digit "8". The results of this paper are: (1) Based on the Yan's creative design methodology, we synthesize 10 new feasible specialized kinematic chains and propose 2 most feasible optical fiber polishers with single flat to avoid the patent of Buzzetti's mechanism. (2) The velocity deviation percentage of double-scotch-yoke optical fiber polisher (V_(dp) = 36.5520%) is lower then the original mechanism (V_(dp) = 76.8652%), 56.35% improvement is obtained. (3) The maximum acceleration of double-scotch-yoke optical fiber polisher (a_(max) = 671.1 cm/s~2) is lower then the original mechanism (a_(max) = 2323.0 cm/sec~2), 71.11% improvement is obtained.