details DESIGN
Add strength with as-cast stiffeners and cored pockets.
• Determining the viability of as-cast cored pockets for weight reduction as well as structural strength largely depends on their location with reference to the part- ing plane.
• Webs and cross ribs in place of thicker cross sections provide the required stiff ness and save weight. Cast iron mechanical properties are directly infl uenced by the section thickness. T inner is stronger than thicker, which is counterintuitive to a lot of design engineers.
Design fastening/mounting features to be easily accessible to feed, to ensure soundness.
• T e design must ensure the attach- ment lugs do not exhibit undesirable discontinuities after machining and drilling, which could be detrimental to the overall system performance.
• Design engineers must spend adequate time to evaluate various alternatives before fi nalizing the parting planes for the pattern and corebox and the orien- tation with regards to the gravity.
Jiten Shah is president of Product Development & Analysis (PDA) LLC (
www.pda-llc.com), Naperville, Ill., and a 25-year casting design and manufacturing veteran.
Jul/Aug 2014 | METAL CASTING DESIGN & PURCHASING | 17
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60