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전차수,최병규 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1
Cutter interference (or part surface gouging) is one of the most critical problems in NC machining of sculptured surfaces. Developed in this study is an algorithmic procedure for cutter interference handling that converts CC-data(cutter contact data; pairs of point and unit normal vector) into interference-free CL-data(cutter location data).
전차수,차경덕 한국CDE학회 2000 한국CDE학회 논문집 Vol.5 No.4
Recently 5-axis NC machines are widely used in Korea. Since 5-axis machines have two more degrees of freedom than 3-axis machines, it is very important to find desirable tool positions(locations and orientations) in order to make an efficient use of expensive 5-axis NC machines. In this research an algorithm to determine “optimal” tool positions for 5-axis machining of sculptured surfaces is developed. For given CC(Cutter Contact) points, this algorithm determines the cutter axis vectors which minimize cusp heights and satisfy constraints. To solve the optimal problem, we deal with following major issues: (1) an approximation method of a cusp height as a measure of optimality (2) Identifying some properties of the optimal problem (3) a search method for the optimal points using the properties. By using a polyhedral model as a machining surface, this algorithm applies to sculptured surfaces covering: overhanged surface.
전차수,조형래,박세형 대한기계학회 1995 대한기계학회논문집 Vol.19 No.4
This paper proposes a new approach for modeling sweep surfaces. The overall modeling procedure consists of following steps : (1)remeshing the section curves based on the curve lengths ; (2)remeshing the guide curve and the boundary curves based on a given sweeping rule ; (3)obtaining intermediate section curves at the remeshed points of the guide curve by blending the initial section curves ; (4)compensation of the intermediate section curves ; (5)interpolating the initial and intermediate curves using Hermite interpolant. The resulting sweep surface is expressed in a G$^{2}$ bicubic parametric spline surface.