Monolithic Shape Memory Alloy Based Micro/Meso Manipulator

Northwestern University, Evanston IL

Investigators

Abstract

The research objective of this grant is to develop a monolithic, fist-sized, device for the three-dimensional manipulation of micro/meso-scale objects, ranging in size from several microns to several millimeters. The device will be built of a shape memory alloy whose salient feature is to remember its state. The idea is to integrate structural, actuation and sensing functions into a single/monolithic component that will provide for high reliability, accuracy and robustness at a low cost. The manipulator will be built by a novel Selective Laser Sintering process by which shape memory alloy powder is molted by the laser and deposited under computer control in the required shapes. A comprehensive investigation of the physical and mechanical properties of the manipulator, in conjunction with models of the shape memory effects taking place during its operation, will also be undertaken. Several generations of prototype manipulators will be built and tested. The direct benefits of this project are threefold. An inexpensive pragmatic device that will enhance the efficiency of micro-assembly type of operations and contribute to the realization of tabletop factories of the future for micro manufacturing will be built. A better understanding of the manufacturability and operation of shape memory alloy based devices will add to the knowledge base. The findings will be incorporated into ongoing courses and disseminated through journal articles, seminars, reports, short courses, Internet, etc. contributing to education in micro-manufacturing technologies.