The one-piece ductile iron casting for agriculture tillage equipment is produced via green sand with one coldbox core.


Compared to the original weldment (right), the casting design (left) improved strength by repositioning some of the metal.


• Wil-Rich reported the casting in- creased strength. Monarch designed the casting to add extra material in areas where strength was needed, which was more diffi cult and costly in a weldment. “We looked for ways to lighten the part with cast windows but still


sembly interferences associated with the weldment.


provide the required strength through varying fi llets,” said Matt Downing, pattern shop manager, Monarch In- dustries. “With good communication, it wasn’t long before we had a cast part that met the customers’ needs and was ready for FEA testing.” T e customer also reported that


the cast component improved the overall appearance of the shank arm.


T e company logo and part number were incorporated into the design. T e castings were machined and


painted onsite, allowing Monarch to deliver components ready for assembly.


Sept/Oct 2015 | METAL CASTING DESIGN & PURCHASING | 35


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