Dr. Hans-Juergen Roscher Profile

Dr. Hans-Juergen Roscher

at Fraunhofer-IWU

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 30 March 2012 Paper

Adaptronic tools for superfinishing of cylinder bores

Hans-Jürgen Roscher, Carsten Hochmuth, Michael Hoffmann, Michael Praedicow

Proceedings Volume 8343, 83430M (2012) https://doi.org/10.1117/12.917906

KEYWORDS: Actuators, Control systems, Amplifiers, Combustion, Manufacturing, Tolerancing, Head, Product engineering, Analog electronics, Interfaces

Read Abstract +

Proceedings Article | 7 April 2009 Paper

New modular piezo actuator with built-in stress-strain transformation

Thomas Rödig, Andreas Schönecker, Lutz Seffner, Welf-Guntram Drossel, Holger Kunze, Hans-Jürgen Roscher

Proceedings Volume 7288, 72881O (2009) https://doi.org/10.1117/12.817529

KEYWORDS: Actuators, Composites, Metals, Ceramics, Transducers, Manufacturing, Kinematics, Solid state electronics, Micro optics, Microfluidics

Read Abstract +

Proceedings Article | 11 April 2007 Paper

Vibration damping with active carbon fiber structures

Reimund Neugebauer, Holger Kunze, Mathias Riedel, Hans-Jürgen Roscher

Proceedings Volume 6527, 65270W (2007) https://doi.org/10.1117/12.716257

KEYWORDS: Actuators, Sensors, Microsoft Foundation Class Library, Carbon, Structured optical fibers, Finite element methods, Model-based design, Kinematics, Diffractive optical elements, Composites

Read Abstract +

Proceedings Article | 30 March 2006 Paper

Control of sheet-metal forming processes with piezoactuators in smart structures

Reimund Neugebauer, Michael Hoffmann, Hans-Jürgen Roscher, Sören Scheffler, Klaus Wolf

Proceedings Volume 6171, 61710E (2006) https://doi.org/10.1117/12.657387

KEYWORDS: Actuators, Metals, Control systems, Smart structures, Sensors, MATLAB, Modulation, Simulink, Computer simulations, Intelligent sensors

Read Abstract +

The most important project in sheet metal forming is streamlining the material flow since each rejects increases production costs. Using the multipoint cushion device together with an elastic blankholder makes it possible to actively manipulate the material flow in the flange range. This allows major enhancements in the deformation ratio, especially with the novel high strength materials in car body production. State-of-the-art is multiple draw pins to initiate the force on selected points on the blankholder. Admittedly, the cushion plate does not allow optimum force allocation because it is situated between hydraulic pressure rollers and draw pins. Replacing selected draw pins with piezoactuators for generating high forces allows systematic control of the force progression at critical forming areas during sheet draw-in. The system, consisting of the piezostack actuator, dynamometer and components for force initiation, was built as a compact unit with low resilience with the intension of using the inherent sensory properties of the piezostack actuator to measure force. Applying this principle throughout allows a reduction of hydraulic components which eventually lead to a less expensive one- point cushion device. Initial finding have already been arrived at in the context of a research project at the Fraunhofer Institute for Machine Tools and Forming Technology in Chemnitz, Germany in cooperation with a partner from the automobile industry. A draw pin was replaced ad hoc with a highly durable piezoactuator integrated in a force control cycle. The force progression during the sheet draw-in could be accurately adjusted according to a predetermined master curve. The master curve was taken up in the unregulated process and represents the quality criteria of a formed useable part. The real-time MATLAB Simulink XPC- Target simulation tool was used to develop an adjustment strategy that connects the specific signals of the press control (such as the tappet path, the die cushion position and the die cushion force) with the reference force (i.e., the master curve) and the actual force of the piezoactuator.

Proceedings Article | 14 August 2003 Paper

Hybrid struts with smart piezoactuators for high-dynamic parallel kinematics

Reimund Neugebauer, Welf-Guntram Drossel, Hans-Juergen Roscher

Proceedings Volume 5054, (2003) https://doi.org/10.1117/12.483895

KEYWORDS: Actuators, Sensors, Kinematics, Control systems, Chemical elements, Bridges, Amplifiers, Solid state electronics, Computer simulations, Information technology

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years