Guide
Precision Mechanics Parts Testing with Impulse Excitation
Using IET for quality assurance of precision mechanical components including metals, sapphires, and ceramics in manufacturing.
Author: Flowzy
Overview
The Impulse Excitation Technique enables mapping of the full mechanico-elastic fingerprint of components and assemblies, providing comprehensive quality assurance for precision mechanics parts.
Quality Assurance Capabilities
IET measurement technology assures:
- Consistent quality of parts and subassemblies
- Crack detection in finished components
- Mechanical performance measurement
- Manufacturing process optimization
Technology Standards
For determining elastic properties of precision mechanics parts (metals, sapphires, ceramics), the Impulse Excitation Technique is documented in multiple standards:
- ASTM E1876
- ISO 17561
- DIN EN843-2
Measurement Capabilities
Systems operate as standalone devices that return key material properties instantly:
| Property | Description |
|---|---|
| E-modulus | Young’s modulus (stiffness) |
| G-modulus | Shear modulus |
| Poisson’s ratio | Lateral/axial strain ratio |
| Porosity indicators | Density-related variations |
| Microcrack detection | Damping-based identification |
The “tap and read” method based on resonance frequency profiles provides immediate results.
Manufacturing Applications
Process Influence on Properties
The firing or sintering process of ceramic products significantly influences mechanical properties. Critical processes controllable through IET measurement include:
- Material composition
- Firing parameters
- Finishing steps (polishing, grinding)
- Heat treatments
- Hardening cycles
Process Stability Assessment
The resonance frequency profile can be determined before and after each manufacturing step, allowing calculation of process stability. This enables:
- In-line process monitoring
- Batch consistency verification
- Process parameter optimization
- Early detection of drift
Crack Detection
Cracks and microcracks are detected through increased damping of resonance frequencies. Even internal defects invisible to visual inspection produce measurable changes in the vibration response.
Applications by Material
- Metals: Machined components, sintered parts
- Sapphires: Optical and electronic substrates
- Technical ceramics: Wear components, insulators
- Precision assemblies: Multi-material systems
Ready to Get Started?
Contact us to discuss your requirements and see how IET can help.