Shot Peening Intensity Concept
Shot peening intensity indicates the impact degree of shots on workpiece surface, measured by arc height (Almen value).
Intensity Grades
| Almen Strip | Intensity Range | Application |
|---|---|---|
| N (Thin) | 0.15-0.45 mmA | Precision parts, thin plates |
| A (Standard) | 0.15-0.60 mmA | General strengthening |
| C (Thick) | 0.15-0.90 mmA | Heavy parts, thick plates |
Arc Height Test Method
Test Principle
- Fix standard Almen strip on holder
- Strip bends after peening treatment
- Measure arc height = peening intensity
Test Procedure
Preparation
- Select appropriate strip
- Clean strip surface
- Fix strip on holder
Peening Treatment
- Treat strip per process parameters
- Ensure coverage ≥100%
- Record peening time
Arc Height Measurement
- Use Almen gauge
- Record arc height value
- Confirm compliance
Intensity Control Methods
Parameter Adjustment
| Parameter | Adjustment | Effect |
|---|---|---|
| Shot velocity | ↑ | Intensity ↑ |
| Shot flow | ↑ | Intensity ↑ |
| Shot size | ↑ | Intensity ↑ |
| Peening time | ↑ | Coverage ↑ |
Practical Control
Velocity Control
- Adjust blaster RPM
- Check blade wear regularly
- Maintain stable velocity
Flow Control
- Adjust supply valve
- Calibrate flow meter
- Monitor actual flow
Size Selection
- Select shot based on intensity needs
- Maintain size consistency
- Regular screening check
Quality Standards
Aviation Industry
- AMS 2430: Shot peening process specification
- AMS 2432: Automated peening specification
- Intensity specified by design drawing
Automotive Industry
- Intensity typically 0.35-0.55 mmA (A strip)
- Coverage ≥95%
- Periodic test verification
Common Issues
Low intensity
- Insufficient blaster velocity
- Shot size too small
- Severe blade wear
High intensity
- Excessive velocity
- Shot size too large
- Possible over-peening
Technical Support: We provide Almen strips and gauges, can help establish peening intensity test procedures, offer process parameter optimization advice.
