Abstract
Abstract This paper describes an upper bound modelling based technique to design preforms for forging of rotationally symmetric parts. A reversing algorithm which results in improved metal flow in the final stages of filling the cavity is applied to the precision forging of bevel gears. The predicted preform has a simple rotationally symmetrical profile which accommodates the simultaneous filling of the gear teeth. Experimental results show that the preform designed by this technique requires less energy in the final stages of the forging.
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