Production of Crankshafts by Clamp Shearing
A crankshaft can be produced from a bar by stopping the clamp-shearing operation in the middle of the press stroke. This paper deals with the technical development of the production process. In the preliminary shearing test of 15 mm bars of copper and mild steel, the optimum shear-forming conditions and the strength of the connected shear-formed zone were experimentally investigated. This was successfully applied to the actual production of a crankshaft of Al-63S in an electrical business machine. The newly developed clamp-shearing tool for making crankshafts has been working for the last three years and its construction is discussed in detail in this paper.
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