Bibliography:
1. @Article ={Kawabe et_al :1983,
title ={Programming for machining based
on workpiece
models in Computer},
author ={S.Kawabe,S.Shimura,K.Miyashita,F.Kimura,T.Sata},
year ={1983},
journal ={Annals of CIRP},
volume ={32},
number={1},
pages ={351-355},
annote ={
Here, a programming method is proposed which is able to
generate cutter motions from the Solid model of a workpiece
in Computer.Besides the system has ability to avoid collisions
by making full use of the functions of Solid modeling. The solid
Modeling package used in the system is GEOMAP-3 which has
been developed to place at the kernel of an integrated CAD/CAM
system. In the system an object model for the workpiece is defined
as a solid model and is attached with the necessary machining
information such as surface finish,dimensions,tolerances,material,
some special specifications like holes.Object models for blank
parts and the environment are also defined.This is an interactive
type of data generation for machining process from the work-
piece model.Machining operations are restricted to hole cutting,
contour milling,area cutting including pocketing.After generating
cutter paths cutting simulation is performed to check collision of
the tool against work-piece & clamps to generate a new cutter path
to avoid it when collision is detected.
Thus in this study basically a programming system for 2(1/2)
NC machining based on workpiece models in Computer along-
with NC data is developed.
}
2. @Article={Chuan-Jun Su and Amitabha Mukerjee:1991,
title ={Automated
machinability checking for
CAD/CAM},
author ={Chuan-jun Su and Amitabha Mukerjee},
year ={1991},
journal ={IEEE Transactions on Robotics and Automation
},
volume ={7},
number ={5},
pages ={691-699},
annote ={
This paper presents a methodology to determine whether
or not a part is machinable on a three axis milling machine
by
consideration of tool motion.The method gives a set of machining
directions ,called the basis set and testing if the process plan
generated succeeds in machining the workpiece in that direction.
The machinability checking module presented acts as a filter that
rejects improper part designs for a three axis milling machine
before the NC code generation module is activated.The algorithm
developed is based on consideration of the tool motion.First, a
convex enclosing object is constructed about the part.The part
is then orthogonally projectedto the infinite planes containing
the enclosing object faces.Next,the truncated prisms that are
bounded by the part faces & the projections are constructed.
If for every part face there exists atleast one truncated right
prism that does not intersect the part itself, then the part satis-
-fies the criterion for machinability.The algorithm is presented
alongwith some practical considerations such as cutter
informationThe algorithm is incarporated into object based
automatic NC code generation system.Part is designed in the
I-DEAS modeler which checks machinability & generates
NC code for generating the part.
}