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The XM360 cannon is being redeveloped into the XM360E1 for the next M1 Abrams tank upgrade.


to minimize the distortion dur- ing the quench. The next issue involved facilitating part inspec- tion during the straightening pro- cess. The team decided to design an inspection fixture using go/ no-go gages on critical features. A conventional metal inspection fixture was deemed too costly with too great a lead time for a single casting. As an alternative, the check fixture was designed to use the conventional metal go/ no-go gages. HAB created the gating design using CAD model- ing, but did not perform verifica- tion with solidification software due to the high cost and long lead time estimates received. Instead, the company relied on its exten- sive tooling experience and ability to produce a sound casting. After inspection, HAB shipped the SLA patterns to Acme Castings, along with a gat- ing design model that included fully dimensioned gating draw- ings and all wax gate bars cut to size and identified. The met- alcaster gated the part accord- ing to HAB’s design, dipped the ceramic and fired the shell.


February 2014 MODERN CASTING | 45


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