Boots – shoes – and leggings
Patent
1988-09-26
1990-03-06
Ruggiero, Joseph
Boots, shoes, and leggings
3644742, 36447424, 36447429, G06F 1546
Patent
active
049071645
ABSTRACT:
A method is presented to generate 2D tool paths and to optimize the ordering of these tool paths for 21/2 axis milling of cavities for molds and dies. All motion of the cutting tool is dictated and the number of retractions is reduced to a minimum without violating a prechosen set of ordering guidelines. Predrill locations for tool plunges are specified. A 3D solid model of the cavity region with optional islands, avoidance and containment regions is constructed and a planar section through the model forms a closed curve with nested and disjoint loops. Successive inset curves are taken until there are no arcs in the curve. An ordered list of roughing tool paths is generated with a retraction indicated when necessary to prevent gouging, and finishing tool paths are augmented with tangential approach and exit arcs and milled last.
REFERENCES:
patent: 4618924 (1986-10-01), Hinds
patent: 4736306 (1988-04-01), Christensen et al.
patent: 4757461 (1988-07-01), Stohr et al.
patent: 4792889 (1988-12-01), Kragelin et al.
patent: 4833617 (1989-05-01), Wang
A. A. G. Requicha and H. B. Voelcker, "Solid Modeling: a Historical Summary and Historical Perspective", IEEE Computer Graphics and Applications, Mar. 1982, 9-24.
Davis Jr. James C.
General Electric Company
Ruggiero Joseph
Webb II Paul R.
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