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The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title: Modeling of deformed swept volumes with SDE and its applications to NC simulation and verification
Author: Lu, Feng
View Online: njit-etd1997-071
(ix, 100 pages ~ 3.4 MB pdf)
Department: Department of Mechanical Engineering
Degree: Master of Science
Program: Mechanical Engineering
Document Type: Thesis
Advisory Committee: Leu, M.C. (Committee chair)
Blackmore, Denis L. (Committee member)
Ji, Zhiming (Committee member)
Date: 1997-10
Keywords: Milling-machines--Numerical control.
Deformations (Mechanics)--Mathematical models.
Availability: Unrestricted
Abstract:

Representation of swept volumes has important applications in NC simulation and verification as well as robot-motion planning. Most research on .the representation of swept volumes has been limited to rigid objects. In this study, a sweep deferential equation (SDE) approach is presented for the representation of deformed swept volumes generated by flexible objects.

The deformed swept volume analysis is integrated with machining physics to account for tool deformation/deflection for the NC simulation. End milling is modeled and analyzed and the tool deformations are calculated and integrated with the SDE program. A program is developed in C++ for the generation of deformed swept volumes. Using Boolean subtraction, the deformed swept volume of the tool is cut from the workpiece to simulate the machined part. It is shown that this representation approach constitutes an efficient and accurate NC simulation technique for collision detection, geometric verification as well as surface error prediction.


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