Author : Omkar Tunge, Sanket Kuhikar, Sanket Gaikwad and Anand R. Nadgire

Versatility of the Manufacturing sector demands the production of Special Purpose Machines for increasing productivity, reducing machining time and human work force. Raw castings often contain irregularities caused by seams & imperfection in moulds, as well as access ports for pouring material into the moulds. A special purpose trimming machine can be used for removal of fins from castings rather than conventional manual grinding. This requires customized punch and dies according to the workpiece. This paper mainly deals with design of punch and die in a trimming machine for fettling of a differential bearing cap casting. Parameters are selected considering the geometry and material of the fin.

Keywords: Castings, trimming, fins, punch, die, fettling, differential bearing cap