Journal ArticleDOI
Methods for detecting errors in numerically controlled machining of sculptured surfaces
TLDR
A technique designed to move the NC proof process into software is described, which outputs a color-coded graphics display of the machined surface that shows out-of-tolerance areas.Abstract:
The numerically controlled (NC) machining of sculptured surfaces is an error-prone process often requiring several attempts before an error-free NC program is produced. A technique designed to move the NC proof process into software is described. The system outputs a color-coded graphics display of the machined surface that shows out-of-tolerance areas. To gain efficiency, surface curvature and cutting-tool size are used as inputs to a surface discretization algorithm, which guarantees that a user-defined level of simulation accuracy is achieved. The simulation time grows linearly in both desired accuracy and in the number of tool movements. In typical test cases, NC programs for complex automotive body panels were simulated and verified in CPU times that ranged between 5 and 30 minutes. >read more
Citations
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Journal ArticleDOI
Optimizing tool orientations for 5-axis machining by configuration-space search method
TL;DR: A searching method in the machining configuration space (C-space) is proposed to find the optimal tool orientation by considering the local gouging, rear gouging and global tool collision in machining.
Journal ArticleDOI
5-axis machining of sculptured surfaces with a flat-end cutter
Susan X. Li,Robert B. Jerard +1 more
TL;DR: Research on algorithms for the generation of gouge-free, nonisoparametric 5-axis tool paths across composite surface patches is described, which includes the tesselation of the parametric surfaces into triangles.
Journal ArticleDOI
A new format for 5-axis tool path computation, using Bspline curves
TL;DR: A new format of tool path polynomial interpolation in 5-axis machining is presented that involves a faster tool path and a better surface quality and imposes a modification of the process so as to take the interpolation format and the inverse kinematics transformation into account.
Journal ArticleDOI
A classified bibliography of literature on NC milling path generation
Donald Dragomatz,Stephen Mann +1 more
TL;DR: The literature is partitioned into categories and papers related to path generation classified according to the topics they cover, to be useful to those looking for references on specific topics as well as those seeking an introduction to the literature as a whole.
Journal ArticleDOI
Modeling of cutting geometry and forces for 5-axis sculptured surface machining
TL;DR: 5-Axis sculptured surface machining is simulated using discrete geometric models of the tool and workpiece to determine the tool contact area, and a discrete mechanistic model to estimate the cutting forces.
References
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Book
Geometric Modeling
TL;DR: This text accurately treats the parametric geometry of curves, surfaces and solids, the construction of geometric models and the analytical techniques that can be used and applications.
Book
Computational Geometry for Design and Manufacture
I. D. Faux,M. J. Pratt +1 more
TL;DR: In this paper, the mathematical techniques for the representation, analysis and synthesis of shape information by computers are discussed, and splines and related means for defining composite curves and "patched" surfaces are discussed.
Journal ArticleDOI
A survey of curve and surface methods in CAGD
TL;DR: It is suggested that B6zier curves should be considered as a single type of curve, but the design of these curves should not be confused with other types of curves, which are known to have different properties.
ReportDOI
Surfaces for computer-aided design of space forms
TL;DR: A method is described which makes possible the description of free-form doubly curved surfaces of a very general kind, specifically devised for use in the Computer-Aided Design Project at M.I.T.