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DFG
FOR 1845
UP-HPC
DFG Research Unit
FOR 1845
Ultra-Precision High Performance Cutting (UP-HPC)

Projects

TP1: Ultra-precise milling with multiple diamond tools

The first project (TP1) focusses on the development of a position control for rotating diamond tools on the basis of thermal expansion of the tool holder. Due to required precision - the cutting edges need to be aligned within the same order of magnitude as the kinematic roughness of the surface - this can only be achieved by a dedicated feedback loop and a sophisticated control of the required heat source. <more>

Research institute:

LFM, Universität Bremen
Contact: Dr.-Ing. Lars Schönemann (schoenemann@iwt.uni-bremen.de)

TP2: Ultra-precision high-speed milling

The focus of the second project (TP2) is the scientific evaluation of high-speed-cutting (HSC) in diamond milling, by analyzing its effect on the wear of the diamond tools as well as on the surface integrity of the machined workpiece. Special attention will be given to difficult to machine and brittle materials, such as hardened steel, polycarbonate, silicon, optical glass and ceramics, which could benefit from this technology. <more>

Research institute:

LFM, Universität Bremen
Contact: M. Sc. Daniel Berger (d.berger@iwt.uni-bremen.de)

TP3: Electromagnetic ultra-precision linear guide

In the third project, an electromagnetically driven ultra-precise linear guide will be developed. Such a guide would offer serveral benefits in ultra-precision machining: apart from a fast and frictionless precision movements, an in-process compensation of static and dynamic deviations, e.g. induced by residual unbalances, could be achieved. Thus, the research work of this project aims at using the high-resolution control of the electromagnetic guide for this purpose. <more>

Research institute: IFW, Leibniz Universität Hannover
Contact: M. Sc. Rudolf Krüger (krueger_r@ifw.uni-hannover.de)

TP4: Balancing of spindles for ultra-precision high-speed milling

Due to the high resulting centrifugal forces, high speed spindles required an extremely well balanced setup. This topic will be addressed in the fourth project of the UP-HPC research group. For the first time, an automatic system for precision balancing of air bearing spindles will developed, which would supersede manual balancing completely and thus considerably reduce setup times. The scientific challenge in this approach, however, is to be able to measure and compensate extremely small residual unbalances, which are below the detection threshold of conventional sensor systems. <more>

Research institutes:

bime, Universität Bremen
Contact: M. Sc. Nasrin Parsa (parsa@bime.de)

LFM, Universität Bremen
Contact: M. Sc. Timo Dörgeloh (t.doergeloh@iwt.uni-bremen.de)

TP5: Model-based toolpath correction for ultra-precision machining

The fifth project is aimed to lay the foundations for an in-process-analysis of the dynamic behavior of ultra-precision machined tools, in order to ensure the reliability of the machining process before commencing the actual cutting operation as well as during the cutting of the workpiece. Therefore, a parametric model of the machine's structure and the cutting operation will be developed and tested in machining experiments. <more>

Research institutes:

bime, Universität Bremen
Contact: M Sc. Johannes Hochbein (hochbein@bime.de)

IFW, Leibniz Universität Hannover
Contact: Dipl.-Ing. Per Schreiber (schreiber@ifw.uni-hannover.de)