Deep rolling of valve
Task
Replace slide grinding (vibratory grinding); roller burnishing to Rz < 2 μm yield residual compressive stress
Solution
Burnishing and yielding residual compressive stresses by deep rolling of the tulip area with EG45-40M tool
User benefits
- Reduce the process costs of about 25%
- Process time ampulated of about 30%
- Fatigue strength reached
Details
- Workpiece: Valve
- Part of: Ship diesel engine
- Material: NIMONIC
- Tensile strength: 1600 N/mm2
- Hardness: 40-45 HRC
Parameter
- Tool: EG45-40M
- Circumferential speed: 250 m/min
- Feed rate: 0,15 mm/rev.
- Rolling force: 750 bar
- Cycle time: 3-5 seconds
DOWNLOAD Application Example Valve
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ECOROLL AG - Deep rolling of a valve Burnishing and yielding residual compressive stresses by deep rolling of tulip area