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IMPROVEMENT OF SURFACE INTEGRITY AND MATERIAL FATIGUE STRENGTH BY HIGH SPEED CBN GRINDING USING SMALL WHEEL DIAMETERS

Objective



In industrial practice,judging precision parts on their geometrical accuracy alone is increasingly seen as inadequate.The demand for consideration of the entire pattern of loads acting on a components imposes new requirements on the microstructure of the workpiece surface zone in terms of thermal damage avoidance and a defined residual stress state,influenced predominantly by the grinding process used to finish the component.The objective must therefore be party to match specific component properties to the expected stresses and partly to assure high process reliability.To thisend,the project aims at development of an intelligent high-speed grinding system based on an improved high-speed grinding machine for small grinding wheel diameters (ds=250mm)and modern sensor systems.

The advantages of high-speed grinding technology and the superhard cutting material CBN will be exploited and enhanced to cover a higher range of cutting speeds,opening the way to lower grinding forces and greater process reliability through reduced grit wear.

Significant project objectives include the development of an innovative system combining a dressable grinding wheel and matched dresser roll for cutting speeds up to vc=250m/s with an innovative monitoring system,capable for example of detecting changes in work material properties due to grinding burn.These capacibilities will be assimilated in a control algorithm and integrated in an intelligent machine control designed for defined influencing of workpiece surface-zone properties during the grinding process.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

TACCHELLA MACCHINE SPA
Address
Regione Sant'anna
15016 Cassine
Italy

Participants (5)

DIAMANT BOART SA
Belgium
Address
Avenue Du Pont De Luttre 74
1190 Brussels
Rheinisch-Westfälische Technische Hochschule Aachen (RWTH)
Germany
Address
Steinbachstraße 53B
52074 Aachen
Robert Bosch GmbH
Germany
Address

70001 Stuttgart
WALTER DITTEL GMBH
Germany
Address
Erpftinger Strasse 36
Landsberg Am Lech
WASSERHYDRAULIK GmbH
Germany
Address
H Rte 6
7951 Ingoldingen