combined deep drawing and ironing process analysed experimentally and using FEM

The combined deep drawing and ironing process analysed is the second stage in the
manufacturing of thin walled cans; the subsequent stages are pure ironing stages. In the production it was found that it is extremely important that the can produced in the deep drawing and ironing stage has an even height. The die used was made with a cylindrical die land and detailed FEM-simulations show that an uneven can height can be caused by a slight tilt of the die and or punch. Instead of using a die with a cylindrical die land it is suggested to make the die land with a circular profile. FEM-simulations show that if the die made with a circular profiled die land the can produced is nearly unaffected by a slight tilt of the punch and or die.
The FEM-simulations thus strongly indicate that the combined deep drawing and ironing process becomes significantly more robust when the die is made with a circular profiled die land compared to when a conventional die design with a cylindrical die land is used.
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