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Abstract：
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Strength checking formula for blanking punch in current documents have been reviewed and the anti-bending ability of blanking punch is discussed.At first,existing two groups of strength checking formulae are listed to expose the differences between them.Then,on the basis of pressure rod stability theory from Mechanics of Materials,those formulae are deduced and analyzed considering the configuration and working condition of blanking punch.Finally,It is pointed out that one group of formulae on strength checking computation are incorrect on selecting safety coefficient either in theory or in practice,and the other group are validated to be reasonable and practical by selecting one existing blanking punch as a sample.
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Funds：
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江西省自然科学基金资助项目(0450042);;
江西省教育厅科研资助项目(赣教技字[2005]28号)
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AuthorIntro：
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Reference：
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