Open Access System for Information Sharing

Login Library

 

Article
Cited 2 time in webofscience Cited 0 time in scopus
Metadata Downloads

CASTING WITH SKEWED EJECTION DIRECTION

Title
CASTING WITH SKEWED EJECTION DIRECTION
Authors
Ahn, HKCheng, SWCheong, O
POSTECH Authors
Ahn, HK
Date Issued
Apr-2006
Publisher
SPRINGER
Abstract
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.
Keywords
computational geometry; casting; castability; algorithm; computer-aided design and manufacturing; DESIGN; SEARCH; MOLD
URI
http://oasis.postech.ac.kr/handle/2014.oak/28553
DOI
10.1007/S00453-005-1
ISSN
0178-4617
Article Type
Article
Citation
ALGORITHMICA, vol. 44, no. 4, page. 325 - 342, 2006-04
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

 AHN, HEE KAP
Dept of Computer Science & Enginrg
Read more

Views & Downloads

Browse