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research-article

Parametric Design of Scalable Mechanisms for Additive Manufacturing

[+] Author and Article Information
Xianda Li

Institute of Intelligent Manufacturing and Information Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; 200240
sbnine@sjtu.edu.cn

Jie Zhao

Department of Physics and Astronomy, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; 200240
carrotzhao@sjtu.edu.cn

Ren He

Institute of Intelligent Manufacturing and Information Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; 200240
hrmuye@sjtu.edu.cn

Yaobin Tian

Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
ybtian@ust.hk

Xiangzhi Wei

Institute of Intelligent Manufacturing and Information Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China; 200240
antonwei@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038300 History: Received May 17, 2017; Revised October 07, 2017

Abstract

Additive manufacturing allows a direct fabrication of any sophisticated mechanism when the clearance of each joint is sufficiently large to compensate the fabrication error, which frees the designers of cumbersome assembly jobs. Clearance design for assembly mechanism whose parts are fabricated by subtractive manufacturing has been well defined. However, due to the fabrication error and the diversity of materials the related standard for parts fabricated by additive manufacturing is still under exploration. For saving time and materials in a design process, a designer may fabricate a series of small mechanisms to examine their functionality before the final fabrication of a large mechanism. As a mechanism is scaled the joint clearance may be reduced, which affects the kinematics of the mechanisms. Maintaining certain clearance for various joints during the scaling process, especially for gear systems, is an intricate problem involving intense analysis of nonlinear systems. In this paper, we give a systematic study on the parametric design problem for the major types of joints, which allows the mechanisms to be scaled to an arbitrary level while maintaining the kinematics of the mechanisms. Simulation and experimental results are present to validate our designs.

Copyright (c) 2017 by ASME
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