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Basic Principles of Deep Rolling
Fig. 1: Compressive residual stresses in rim zone
Kinematik
Fig. 2: Cold-forming
Material Flow
Fig. 3: Percentage cold-forming
Eigenspannungen
Fig. 4: Smoothing

Deep rolling is similar to roller burnishing when deforming and positively influencing a component’s edge zone characteristics. However, it is the only process to increase fatigue strength which combines

  • the generation of compressive stresses,
  • cold work in a material’s rim zone and
  • smoothing a component’s surface and thus removing micro notches.

This combination can improve fatigue strength up to five times and therefore significantly increase the service life of a component. Deep rolling is especially recommended for components which underlie dynamic stress during operation and can therefore be destroyed by material fatigue.

Compared to alternatives (e.g. shot peening), deep rolling generates lower costs and investment and is suitable for almost every metal surface. Deep rolling tools can be used on existing customer tool machines (conventional and CNC-controlled) and can be integrated seamlessly into the process chain. A workpiece can be deep rolled in one setting directly after machining. Set-up and transportation costs can be eliminated. This process can be used with a wide variety of components to increase fatigue strength or enable light-weight design solutions.

All mechanical (e.g. shot peening), thermal (e.g. laser hardening) and thermochemical (e.g. nitriding) processes to increase the fatigue strength of a workpiece can be replaced by deep rolling. Since we would like to offer you demand-oriented solutions, please get in touch with us for detailed information and advice.