Browsing by Author "WU, MC"

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FLEXIBLE PROCESS PLANNING FOR FINISH MACHINING BASED ON PROCESS REQUIREMENTS MODELING
(1991-03-01)
WU, MC
;
LIU, CR
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工業工程與管理學系
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Department of Industrial Engineering and Management
This research has developed methods to automate the generation of process plans and NC paths for finish machining in milling operations. The generated process plans are flexible and may vary with the capabilities of available manufacturing facilities and desired production criteria. Unmachinable faces of the desired part, if they exist, are also reported. A new concept-process requirement-for modelling the manufacturability of a face is proposed for generating the flexible process plans. In our definition, the process requirement of a face explicitly describes the specifications of the processes capable of machining the face. An algorithm for deriving the process requirements of a workpiece from its boundary representation was developed. With the derived process requirements of a workpiece and the available processes in a particular factory, the set of capable processes for machining the work-piece can be identified. The optimum processes for machining the workpiece are then selected by considering some economic production criteria.
GLOBAL SHAPE INFORMATION MODELING AND CLASSIFICATION OF 2D WORKPIECES
(1994-09-01)
WU, MC
;
CHEN, JR
;
JEN, SR
;
交大名義發表
;
工業工程與管理學系
This paper presents a representation scheme for modelling the global shape information of 2D workpieces and uses this representation scheme to classify workpieces. The global shape information of a workpiece could be seen as its topological structure. Retrieving workpieces with similar global shape would facilitate some design and manufacturing activities. To derive the proposed representation scheme, a 2D workpiece first has to be approximately enclosed by a rectilinear polygon. Then, the simplified skeleton of the rectilinear polygon, a tree structure consisting of a set of line segments, is derived. The line segments on the simplified skeleton involve two types: real links and virtual links. In this paper, we prove that each real link models a rectangular region, and the union of the modelling regions of all real links is equal to the region enclosed by the rectilinear polygon. Briefly, the simplified skeleton of a rectilinear polygon denotes a global decomposition of the polygon, and is topologically similar to the polygon. On the basis of simplified skeletons, a neural network approach is developed for classifying 2D workpieces.