Sprenger A (1999)
Publication Type: Thesis
Publication year: 1999
Publisher: Meisenbach
Edited Volumes: Fertigungstechnik - Erlangen 89
The use of the space frame concept in lightweight body construction in large series is made difficult by the strong fluctuations in properties of aluminum profiles, which lead to low reproducibility in conventional bending processes. For this reason, the foundations for an adaptive profile bending process are developed in the presented dissertation. With the developed control concept, profiles can be bent robustly in just one forming step, so that subsequent straightening and calibration processes can be dispensed with. The adaptive process control provides that the course of the tool reaction force against the travel path of the profile clamping units is recorded during the so-called bending phase. From this information, a value for the axial tensile stress that is optimally adapted to the properties of the respective profile can be determined as a controlled variable. The core of the adaptive forming process is a neural network that maps the relationship between the sensor data and the spring back behavior of the profile. The learning ability of the neural network also allows continuous improvement in the performance of process control in series production. Studies on various profile cross sections and bending radii have shown that the control strategy can be applied to almost all bending tasks.
APA:
Sprenger, A. (1999). Adaptives Streckbiegen von Aluminium-Strangpreßprofilen (Dissertation).
MLA:
Sprenger, Axel. Adaptives Streckbiegen von Aluminium-Strangpreßprofilen. Dissertation, Meisenbach, 1999.
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