Situation:

• Partially high wear rates can appear at hot rolling of profiles due to thermal and mechanical stresses.
• High mechanical abrasion and increased surface disruption at groove zones with high levels of forming.

• This leads to decreased surface quality and tolerance variations and increased groove and roll changes.

Solution:

• Determination of mechanical and thermal stresses of selected profiled rolls
• Further development of the Machine Hammer Peening for the adaption on profiled rolls
• Optimisation through variation of the Machine Hammer Peening parameters for improving the roll material concerning mechanical and tribological properties
• Development and construction of an industrial prototype, including control software
• Industrial tests and verification of the effectiveness of the method
• Cost-benefit analysis for the evaluation of the potential of the method

Operational benefit:

• First implementation of the Machine Hammer Peening on profiled rolls.
• Development of a suitable method concept and industrial prototype.
• Particularly the controlling for the mechanical treatment.
• With the new method parameters the equipment and also the controlling will be able to treat critical roll zones.
• Decreasing wear, Increasing roll service life, improving surface quality.

• Abrasion
• Grooved rolls
• Hot rolling
• Hot rolling of profiles
• Machine hammer peening
• Mechanical stress
• Profiled rolls
• Surface fatigue
• Thermal stress
• Wear rate of tools