期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2018
卷号：2235&2236
页码：479-483
出版社：Newswood and International Association of Engineers
摘要：Investment casting, also known as precision
casting or lost-wax casting is an industrial method to
produce high dimensional accuracy castings. This
method uses an expendable-mould process to cast
complex shapes with superior surface qualities. Ferrous
and non-ferrous metals, both can be cast by this process.
Even castings having thin sections (0.4mm) are being
cast using this method. But this process may sometime
produce casting having defects such as gas porosity,
shrinkage cavity, cold shut, burrs, sand cut, pinhole,
blowhole, insufficient pouring, etc. Porosity is the most
common defect encountered in the castings. To achieve
excellent surface qualities with minimum or no castings
defects, a proper feeding system has to be designed. It is
a critical step for design engineers to design feeder,
choose the optimum location of feeder and number of
feeders. Traditional manual methods used to design a
feeder may involve a large number of trials which in
turn may reduce profits, percentage yield or other
resources. To decrease the product development time,
one such modern approach is to use computerised
casting simulation software. In this software, a large
number of geometrical changes can be made to feeding
system instantly and at the same time, tested for its
optimality. In this paper, a step by step guide to design
feeding system for a part of pressure vessel of ‘Elbow’
shape (Bronze: BS 1400 – Gr. LG2) is presented.
Modelling of feeder is done using Siemens NX software
and simulation is done using SoftCAST software. All the
design parameters are set in such a way that all the
hotspots, shrinkage cavities and gas porosities occur in
feeder and not in casting. This modern technique has
shown significant quality improvement than the
traditional methods.
