The present work includes a new procedure for the operational fatigue strength assessment of tool components considering dynamic influences.
Experimental investigations are carried out on specimen made from the quenched and tempered steel 42CrMoS4-QT as well as from the cast iron with spheroidal graphite EN-GJS-600-3 and with lamellar graphite EN-GJL-250. The results of the tests serve on the one hand for the general validation of operational fatigue strength calculations. On the other hand, the frequency dependency in relation to impact loads is examined. In addition to the validated calculation models, the material tests result in the recognition of a pronounced frequency dependency, which must be considered in future design calculations.
In investigations on a forming and cutting tool, the methodical procedure developed from the material tests is used. An FE simulation of an overall model is created, which is validated with measurements on the tool. The investigations on the forming and cutting tool provide a validated FE simulation model, which contains the tool as well as the press model and the sheet metal part to be machined in the manufacturing process.
Using the submodel technique on a single component, suitable FE results are generated for an operational fatigue strength calculation. The calculation is based on the validated calculation model from the material tests.
In the course of the analyzes on the tool, the validated calculation model for the cast material EN-GJS-600-3 is used. The calculation results correlate with damage that has actually occurred to a component.
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The present work includes a new procedure for the operational fatigue strength assessment of tool components considering dynamic influences.
Experimental investigations are carried out on specimen made from the quenched and tempered steel 42CrMoS4-QT as well as from the cast iron with spheroidal graphite EN-GJS-600-3 and with lamellar graphite EN-GJL-250. The results of the tests serve on the one hand for the general validation of operational fatigue strength calculations. On the other hand, th...
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