Manufacturing processes

Janardan, Ravi; Woo, Tae Ho

doi:10.1201/9781420035315.ch55

Cited by 2 publications

(1 citation statement)

References 32 publications

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“…These systems have to be augmented with a component verifying, purely on the basis of a CAD model of the object, that an object being designed can actually be manufactured using the intended techniques. The surveys by Bose and Toussaint [4], [6] and by Janardan and Woo [16] give an overview of geometric problems and algorithms arising in these manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Casting with Skewed Ejection Direction

2005

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Casting is a manufacturing process in which liquid is poured into a cast (mold) that has a cavity with the shape of the object to be manufactured. The liquid then hardens, after which the cast is removed. We address geometric problems concerning the removal of the cast. A cast consists of two parts, one of which retracts in a given direction carrying the object with it. Afterwards, the object will be ejected from the retracted cast part. In this paper we give necessary and sufficient conditions to test the feasibility of the cast part retraction and object ejection, where retraction and ejection directions need not be the same. For polyhedral objects, we show that the test can be performed in O(n 2 log 2 n) time and the cast parts can be constructed within the same time bound. The complexity of the cast parts constructed is worst-case optimal. We also give a polynomial-time algorithm for finding a feasible pair of retraction and ejection directions for a given polyhedral object.

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Section: Introductionmentioning

confidence: 99%

Casting with Skewed Ejection Direction

2005

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Accessibility analysis using computer graphics hardware

Spitz¹,

Requicha

2000

IEEE Trans. Visual. Comput. Graphics

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Analyzing the accessibility of an object's surface to probes or tools is important for many planning and programming tasks that involve spatial reasoning and arise in robotics and automation. This paper presents novel and e cient algorithms for computing accessible directions for tactile probes used in 3-D digitization with Coordinate Measuring Machines. The algorithms are executed in standard computer graphics hardware. They are a non-obvious application of rendering hardware to scienti c and technological areas beyond computer graphics.

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Manufacturing processes

Cited by 2 publications

References 32 publications

Casting with Skewed Ejection Direction

Casting with Skewed Ejection Direction

Accessibility analysis using computer graphics hardware

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