Abstract
The lifespan of a bevel-gear forging die is determined mainly by its stress state. In order to reveal the stress state and to secure the optimal design of the forging die of a miniature automobile level gear, a boundary-element method (BEM) program has been developed and used to assess a doubly-reinforced die for the precision forging of a bevel gear. According to the program developed by authors, the characteristics of the BEM program are given. On the basis of the results calculated by the use of the BEM, the region of dangerous stress is determined and the effect of the amount of interference on the distribution of stress is revealed.
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