Precision Shearing of Cast Materials by the Opposed Dies Shearing Process

Abstract

The opposed dies shearing process is one of the precision shearing processes based on the idea of smooth surface formation by cutting mechanism and can be applied to brittle materials. This feature is considered to be available for finishing of cast products and a new demand for this process is expected. In this paper, precision shearing of cast materials by the opposed dies shearing process was studied. Four kinds of cast iron and cast aluminum under practical use were tested and unique characteristics in shearing brittle materials were cleared. Influences of working conditions on the quality of sheared edge were investigated and optimum conditions were given for each material. In comparison with other shearing processes, it was conned that the sheared edge quality by this process was much better than that by conventional shearing process and almost equal to that by shaving process.