NDLI: Geometric Modeling of Cutter/Workpiece Engagements in 3-Axis Milling Using Polyhedral Models

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Aras, Eyyup Yip-Hoi, Derek
Copyright Year	2007
Abstract	Modeling the milling process requires cutter/workpiece engagement (CWE) geometry in order to predict cutting forces. The calculation of these engagements is challenging due to the complicated and changing intersection geometry that occurs between the cutter and the in-process workpiece. This geometry defines the instantaneous intersection boundary between the cutting tool and the in-process workpiece at each location along a tool path. This paper presents components of a robust and efficient geometric modeling methodology for finding CWEs generated during 3-axis machining of surfaces using a range of different types of cutting tool geometries. A mapping technique has been developed that transforms a polyhedral model of the removal volume from Euclidean space to a parametric space defined by location along the tool path, engagement angle and the depth-of-cut. As a result, intersection operations are reduced to first order plane-plane intersections. This approach reduces the complexity of the cutter/workpiece intersections and also eliminates robustness problems found in standard polyhedral modeling and improves accuracy over the Z-buffer technique. The CWEs extracted from this method are used as input to a force prediction model that determines the cutting forces experienced during the milling operation. The reported method has been implemented and tested using a combination of commercial applications. This paper highlights ongoing collaborative research into developing a Virtual Machining System.
Starting Page	371
Ending Page	382
Page Count	12
File Format	PDF
ISBN	0791842975
DOI	10.1115/IMECE2007-41414
e-ISBN	0791838129
Volume Number	Volume 3: Design and Manufacturing
Conference Proceedings	ASME 2007 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2007-11-11
Publisher Place	Seattle, Washington, USA
Access Restriction	Subscribed
Subject Keyword	Virtual machining Swept volumes Polyhedral models Cutter/workpiece engagements 3-axis milling Geometric modeling Machining Milling
Content Type	Text
Resource Type	Article

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