O+P Fluidtechnik 7-8/2018

IFAS JUBILÄUM
FORSCHUNG UND ENTWICKLUNG
07
08
Setup, methods and goal of SFB 442
Self-energizing hydraulic brake – SEHB
4 TH DECADE – THE 2000 TH
One research highlight in this decade was the collaborative research
center (Sonderforschungsbereich) SFB 442. Its goal was to
research and develop environmentally friendly tribological systems
for exemplary use in machine tools. The main idea consisted in
transferring the additive functions
of fluids to the material
surfaces of the tribological
partners. Therefore, biologically
fast degradable and non-toxic
fluids were developed by
using slightly dosed and
environmentally friendly additives.
In order to take over the
missing lubrication and wear
protection features by the
material compounds of the
tribological bodies basic research
work was done to determine
suitable composite materials.
The basic course of action
adopted within SFB 442 is
described in Fig. 6. The starting
situation provides for the
redesign of tribological systems
on the basis of mineral
oils and the aim was to achieve
the effects of the surface-active
additives by transferring the
additive functions directly into
the surfaces. This required
research into and development
of new ester fluids based
on oleic acid methyl esters, as
well as efficient coating
systems, which are capable of
performing the functions of
the additives. Graded carbon
coatings and coatings of hard
material were worked out as a
function of the respective
tribological system and adapted
to meet the specific requirements
for the point or area of
contact. A machine tool with
both components and processes
capable of running on
environmentally compatible
lubricants was utilized within
the research project. At the
same time, the concept had to
allow for the methodical
approach of integrating
environmental protection into
the production process in
accordance with the EU regulatory
framework for Registration,
Evaluation and Authorization
of Chemicals (www.reach-info.de).
Having successfully
completed all 4 phases
within a 12+ year funding span, today it is possible to design tribological
systems with the help of the design and dimensioning method
that incorporates the knowledge acquired from those scientific
results which are stored and accessible in a database. Many interdisciplinary
dissertations resulted and just those from IFAS are
listed in Fig. 7. Two professors that qualified within this research
42 O+P Fluidtechnik 7-8/2018