Machining feature recognition and tool-path planning.
Date Issued
2005
Date
2005
Author(s)
Sheen, Bor-Tyng
DOI
zh-TW
Abstract
This study develops an effective method for identifying machining features. While recognizing features, the workpiece is sliced at some specified positions. The sectional curves of the workpiece faces and slicing plane constitute the feature profiles. Not only the isolated machining features but also the intersecting machining features can be identified by the information from these intersection profiles.
As a result of slicing a 3D part into 2D pockets for generating tool paths, pocket is the one of main tasks. When a pocket is machined, it is an issue for finding the optimal result from the feasible tools. This paper presents a method which a upper bound O( N ) is used to choose the combination of optimal cutting tools, where N is the number of feasible tools.
After the recognition of machining features, the recognized machining features can be applied for scheduling the manufacturing sequences. Different kinds of tool paths can be automatically generated for various machining features to improve the cutting efficiency.
After the recognition of machining features and the choosing of tools, the generation of tool paths becomes another issue. Many researches remove the overcutting zones after the whole raw offsets are produced. The paper proposes a dynamic method to remove overcutting zones. This dynamic method can reduce the computational time number and thus secure against the dangers of errors. Meanwhile, a methodology is offered to solve the problem of pocket multi-islands. The speed for the generation of tool paths is even faster than some commercial CAD/CAM packages.
Subjects
特徵辨識
具路徑
形工件
具組合
腦數值控制
過切
Machining feature
tool path
pocket
CAD/CAM
CNC
Type
thesis
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