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details DESIGN


Design Makes Connection for Construction Frame


JITEN SHAH, PRODUCT DEVELOPMENT & ANALYSIS, NAPERVILLE, ILLINOIS CASTING PROFILE


Cast Component: Construction frame connector.


Casting Process: Nobake sand.


Material: Steel 86-20 Grade ASTM A958.


Weight: Various sizes, 41-320 lbs.


Dimensions: Various sizes, 14 x 7 in. to 27 x 14 in.


Machining the small mounting holes was chosen over casting the holes due to their size.


• Cores are an integral part of the sand casting process and typically are placed manually into the mold. T e size (diameter or thickness) with reference to the adjacent casting section thickness, the location with reference to the parting plane, and the ease of placement and core se- curity are key considerations in choosing between as-cast and machined cored holes.


from a steel fabrication, off ered a mechanical design with integrated features, reduced stress concentrations and isotropic properties. T e design reduced fab- rication and welding time, simplifi ed assembly and translates to a wide range of load requirements.


A


new connector design for steel construction was made successful with the metalcasting process and collaborative design between the customer, Cast Connex Corp., Toronto, the Univ. of Toronto, Toronto, and the supplier, Pacifi c Steel Casting Co., Berkeley, Calif. T e fi nal steel casting connector, which was converted


20 | METAL CASTING DESIGN & PURCHASING | Mar/Apr 2013


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