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Author Hu, Y N. Chen, Y H. Institution Univ of Hong Kong, Hong Kong, Hong Kong
Source International Journal of Advanced Manufacturing Technology. v 15 n 9 1999. p 630-639.
Abstract Rapid prototyping plays an important role in product development. There are two ways to realize rapid prototyping: one is to develop new prototyping equipment such as stereolithography apparatus (SLA), selective laser sintering (SLS), etc., and the other is to improve existing CNC techniques. In this work, a robot system for rapid prototyping, which is an enhancement of the CNC based method, is presented. A robot arm holding a milling tool is used to machine the prototype of a solid model drawn using a commercial CAD system. In a previous paper, Part 1, a strategy using the robot for rough machining was discussed and then an automatic tool-path generation method using a grid height array was presented. As a verification of the proposed algorithm, a number of prototypes were produced, which demonstrated the feasibility and advantages of the algorithm. In this paper, Part 2, an approach to represent C-space by incorporating possible variations in tooling orientations is proposed. In order to reduce the error on complex surfaces resulting from undercut or overcut operations, a curvature-matching algorithm is also developed. Finally, experimental work using collision-free planning for manipulator movement and stimulation for the curvature matching algorithm is carried out. (Auth abstract) [References: 16] XX