Yj. Tseng et Sb. Joshi, RECOGNITION OF INTERACTING ROTATIONAL AND PRISMATIC MACHINING FEATURES FROM 3-D MILL-TURN PARTS, International journal of production research (Print), 36(11), 1998, pp. 3147-3165
Citations number
28
Categorie Soggetti
Engineering,"Operatione Research & Management Science
Current feature recognition methods generally recognize and classify m
achining features into two classes: rotational features and prismatic
features. Based on the different characteristics of geometric shapes a
nd machining methods, rotational features and prismatic features are r
ecognized using different methods. Typically, rotational features are
recognized using two-dimensional (2-D) edge and profile patterns. Pris
matic features are recognized using 3-D geometric characteristics, for
example, patterns in solid models such as 3-D face adjacency relation
ships. However, the current existing feature recognition methods canno
t be applied directly to a class of so-called mill-turn parts where in
teractions between rotational and prismatic features exist. This paper
extends the feature recognition domain to include this class of parts
with interacting rotational and prismatic features. a new approach, c
alled the machining volume generation method, is developed. The featur
e volumes are generated by sweeping boundary faces along a direction d
etermined by the type of machining operation. Different types of machi
ning features can be recognized by generating different forms of machi
ning Volumes using various machining operations. The generated machini
ng volumes are then classified using face adjacency relationships of t
he bounding faces. The algorithms are executed in four steps, classifi
cation of faces, determining machining zones, generation of rotational
machining volumes and prismatic machining volumes, and classification
of features. The algorithms are implemented using the 3-D boundary re
presentation data modelled on the ACIS solid modeller. Example parts a
re used to demonstrate the developed feature recognition method.