||Functional surfaces in mechanical handling of microparts
||De Chiffre, Leonardo (Institute for Product Development, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Gegeckaite, Asta (Department of Manufacturing Engineering and Management, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||The present thesis investigates functional surfaces on a mechanical gripping device, in order to improve the handling of micro objects. The projects will focus on different techniques for surface modifications with the applications on micro handling and assembly. The gripper had been tested on robot MELFA RV-1A/ Mitsubishi for handling operation of micro-specimens. Functional surface of gripper was measured by several optical measuring machines, evaluated with powerful image metrology programs and the conclusions had been drawn regarding the suitability for the gripping devices for the micro applications.
Analysis of functional surfaces for mechanical handling of microparts is needed in order to evaluate the impact of tacking surface area ration and different surface parameters. These parameters can strongly affect the functional behavior of handling process of microobjects. For this reason it is a need to develop different techniques for surface modifications.
Mechanical grippers are traditional used for manipulating large objects. Due to this scaling behavior manipulation in microscale is completely different from manipulation in the macro scale. Adhesive forces between gripper and object can be significant, if compared to the gravitation force. These adhesive forces arrives primary from electrostatic attraction, van der Waals and surface tension forces. The balance between these forces depends on the environmental conditions, such as humidity, temperature, surrounding medium, surface condition, material and relative motion.
Design, mathematical modeling and surface structure of griper grasping parts must be developed in order to avoid or decrease influence of surface, material and motion.
Creation date: 2006-12-08
Update date: 2007-02-24