FROM METALCASTINGDESIGN.COM
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Casting Simulation Provides Further Proof of Da Vinci’s Genius
For 17 years, Leonardo Da Vinci researched how to produce a huge equine statue out of bronze in a single pour. But when he had the clay model built and ready to be cast, all the needed bronze was taken to be used for a war against France. The mold and model were destroyed, and the statue was Da Vinci’s “horse that never was.” Many engineers believed the casting would never have been success- ful any way. Recent advances in casting simulation technology pro- vided a way to prove Da Vinci right. The Institute and Museum of the History of Science in Florence, Italy, conducted a casting simulation for the artwork. The result: Da Vinci’s 24-ft., 70-ton horse would have been successfully cast in a single pour in 165 seconds.
Heat Treating’s Strength, Costs Heat treatment can give your part the
critical mechanical properties it needs, allowing you to use a more economical material or manufacturing process. How- ever, the extra cost must be considered in your fi nal unit price. Many fi rms charge on a per-pound basis, but others have a more involved pricing tree. Several factors can affect how much
you pay for heat treating. The level or type of heat treatment required is the fi rst factor. Castings that must use longer temper cycles will cost more. The qual- ity of mechanical properties from these cycles also makes a difference. The added value these properties give to your casting is the trade-off. The shape, complexity and size of
your casting may also weigh in on your heat treating cost. Applied Process, Li-
Wherever you fi nd the cast metal “at” sign (right), reference the given website for more information.
MAY/JUNE 2010
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . POLL QUESTION
The March/April website question
asked: Fill in the blank. Metalcasting surcharges are ________________.
Part of 59.4%
Doing Business
Confusing 12.5% Deceitful 15.6%
This month’s question is available at
www.metalcastingdesign.com.
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vonia, Mich., is a heat treating facility that uses batch-processing to thermally treat ferrous castings. Because of the batch processing, the fi rm can be either volume- or weight-limited. “If the part is compact and dense, we
will be weight limited, which gets the cus- tomer the best price,” said Steve Sumner, plant manager for Applied Process. A small, compact part can fi t more to a basket than the more unwieldy parts. “But a thin, vo- luminous casting without much weight is volume-limited and the price can be higher. The higher the weight to volume ratio, the better the price.” Thin castings have an advantage in
required length of cycle times, however. Just as higher grades of iron require lon- ger soak times to achieve the required properties, so, too, do thicker castings.
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Small & Mighty (p. 33): Read a paper on how casters can disperse nanoparticles.
CastExpo’10 Convenes in Orlando (p. 43): See more pictures from CastExpo’10.
Congress Extends to Buyers, Designers (p. 45): See full presentations from Casting Congress.
Shakeout (p. 64): See a video of students producing a cast sculpture for the Olympics.
METAL CASTING DESIGN & PURCHASING 3
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