Coining of micro Structures with an electromagnetically driven Tool
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Date
2012-07-18
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Abstract
For coining micro structures into high-grade steel 1.4301 a highly dynamic tool system
based on a pulsed magnetic field inside a cylindrical coil was developed. Two kinds of
structures were coined at different tool velocities. The coining results were evaluated
regarding geometrical accuracy, material flow behaviour and energy input. In addition the
high velocity process was compared to a quasi-static process. By increasing the coining
velocity to 30 m/s the accuracy of the quasi-static process can be reached. The energy
that is needed for reaching a similar result is less for coining at high velocities. The tool
velocity also influences the flow behaviour of the workpiece material.
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Keywords
coining, high speed forming, impact