Abstract
Recently, warm forging process takes the place of hot forging process gradually, for example, in manufacturing CVJ. However, die damage is serious problem in warm forging process with large expansion of surface of work piece, because it is not inquired enough. Though trying to extend die life by means of FEM analysis, it dose not play an enough role, because there is few method to evaluate die damage in warm forging condition. The test of Pin-on-disk and Ogoshi wear out can not be also applied to the method of die damage of warm forging process. In this study, we have established new test which could systematically evaluate die damage in warm forging process. And we have examined forging condition in warm forging process about quality of die and cooling system of die. This test aims at utilizing for establishment of simulation engineering of die damage prediction and quantitative evaluation method.
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