Gerhard Hirt

TL;DR: In this paper, the axial profiling process is used for rolling axially profiled rings using finite element analysis (FEA) in order to enable the usage of FEA in the process design stage, which integrates the industrially applied control algorithms of the real process including all relevant sensors and actuators into the FE model of ring rolling.

TL;DR: In this paper, two tooling concepts that allow incremental hole flanging operations at high speeds are investigated, and it is shown that the geometrical accuracy of the parts formed with the second tool concept could be improved significantly (up to 3 times regarding to the mean surface deviation to at maximum speed).

TL;DR: In this article, the spreading behavior of an additive-free lubricant (PAO 4) on coined stainless steel surfaces (AISI 304) under the effect of a controlled temperature gradient of 2

TL;DR: In this article, the sensitivity of the model output with respect to variations in the input parameters plays a vital role for assessing the accuracy and stability of the computation of the numerical model for plate rolling.

TL;DR: In this paper, an alternative strategy based on Thin Plate Spline interpolation is proposed on the example of two high strength materials, and this new strategy can be generally adopted to derive reliable isothermal flow curves over a wide range of temperatures and strain rates.