Jahresbericht 2006 - Biba - Universität Bremen

Collaborative Research Centre 570
Distortion Engineering
Subproject B3
Metrology for the in-process distortion
measurement at heat treatment
The subproject serves to accompany the
Subproject B6
Control strategies for the compensation
of geometric distortion of parts
in a process chain
Subproject B7
Mechatronic system for distortion
engineering by dynamical manipulation
of cutting parameters
Projects
subprojects dealing with heat treatment
The project develops control strategies for
The project develops a fast-tool-servo
in questions of measurement techni-
different levels of quality control, in order
including an in-process-measuring system
ques. In the framework of this project, the
to compensate geometric distortion
and a closed-loop control, which is imp-
metrological tasks in the centre of interest
in the production of steel parts. These
lemented into a lathe. Normally, rings are
are the registration of changes in size and
strategies include in- and post-process
distorted in a lathe due to the clamping
shape (geometry measurement), the
feedback loops as well as a process-
process, which leads to roundness and
reconstruction of temperature gradients
linking control, which will all conribute to
wall thickness deviations after unclam-
from punctual and two dimensional tem-
an overall, uniform quality control of the
ping. With the developed set-up, rings
perature measurements and the charac-
process chain.
with small roundness and wall thickness
terization of the wetting behaviour during
(DFG, 01/2004-12/2007)
deviations can be produced, because
the quenching of workpieces in liquids.
the actual ring geometry is acquired
(DFG, 01/2004-12/2007)
with the measuring system and the tool
Subrojekt B5
Product and process design for
distortion control
position is correspondingly adjusted by
the control loop.
(DFG, 1/2006-12/2007)
The objective of the Collaborative
Research Center „Distortion Engineering“
is the control of distortion during manufacturing.
In this subproject concepts,
methods and tools for product and
process design are analysed. By a better
understanding of causes and effects of
distortion the aim is to anticipate distortion
within the planning of a product.
(DFG, 01/2004-12/2007)
Collaborative Research Centre TR4
Process Chains for the Replication of Complex Optical Elements
Subproject M1
Microtopography: Characterization
of the surface microtopography
of aspherical and deterministically
structured surfaces
Microtopography measurements enable
the surface characterizations with respect
to their functional properties. The project
uses laser optical measuring principles
based on scattered light and speckle
correlation processes for microtopography
characterization. In contrast to
conventional measuring devices scattered
light techniques are fast and show
in-process capabilities.
Subproject M3
Non-destructive near-surface-zone
analysis of arbitrary formed and
structured surfaces
The project deals with photothermal
investigations of the near surface zones
of moulds, which are required for the
low-cost production of precisely shaped
optical components. The project focuses
on the improvement of measurement
techniques for the detection of defects
and for the determination of thermal and
structural material parameters.
(DFG, 07/2001-06/2008)
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