Enhancing Deep Drawing Processes by Using a Thermomechanical Tool Design

Abstract

The nature of phase transformation in metastable austenitic steels due to strain- induced ’-martensite formation is used as new contribution to lightweight construction in crash safety applications. A thermomechanical tool design was developed to enhance the ’-martensite evolution in local areas. Draw and stop beads allow a concerted stretch-out of material by increasing true strain . The local warming of defined regions avoids the phase transformation to retain the original austenitic lattice while a regional cooling enforce this nature by realizing a constant true strain .

Graphical Modelling of a Meta-Model of CAD Models for Deep Drawing Tools

“…The application of 3D CAD modelling in design and construction processes is state of the art in modern engineering. Interactive CAD models are created, completed, or expanded with 3D CAD systems which have been used for years both in the general domain of sheet metal forming and its subfield of deep drawing tools (Behrens et al, 2012;Voges-Schwieger et al, 2009). A finished product model includes a multitude of information, such as geometrical data, technological and functional information as well as information about design and manufacturing process (Feldhusen and Grote, 2013).…”

The STG-framework: a pattern-based algorithmic framework for developing generative models of parametric architectural design at the conceptual design stage

“…Nowadays, the development and design of deep drawing tools in a 3D CAD system are state-of-the-art. These systems allow for the creation, addition and expansion of virtual deep drawing tools [7,25]. In addition to geometry data, the 3D CAD models could also include technological and functional information as well as information about design and manufacturing process [9].…”

Local Strain Hardening of Metal Components by Means of Martensite Generation

“…Unlike in the example of the stainless-steels bearing a pure austenitic matrix, this material possesses a remainder austenite share merely of approximately 15 %, which is available to the conversion. In support of the conducted tool construction (details in [28]), accompanying simulation calculations, aided by the Finite Element Analysis were carried out. An objective of this simulation is to survey the faultless production.…”

“…Based on this experiment, a qualitative impact of increased hardening, being a result of forming, as well as phase conversion become possible. As a result of temperature control, the formation of α'-martensite is able to be suppressed to a large extent, so that the hardness of kinematic hardening is able to be approximated [28,27]. The microhardness measurements follow the grindings of the additionally forming-element's round structures (Fig.…”