Description
To monitor production quality, brake pistons were previously cut up at random and visually inspected by employees. During setup of the system, all the pistons were cut up, resulting in high scrap rates and high labor costs.
The system solution NFT for brake pistons determines dynamic parameters (natural frequencies and damping) and evaluates them using frequency bands (pass/fail). Our high frequency ranges (40 kHz) with high frequency resolution allow even the smallest defects to be identified. Cracks in the wall and base, geometric and form defects, and defects after hardening of the phenolic pistons can thus be detected non-destructively.
MAUL-THEET helps manufacturers work more cost-efficiently (less scrap, fewer false positives, time savings through non-destructive testing). By using the NFT for brake pistons, we ensure that only the highest quality brake pistons are delivered.
Advantages & Innovations
- Crack detection in the complete component (wall/floor), also in phenolic pistons
- Detection of geometric and form defects, even in phenolic pistons
- Detection of defects after curing/through-curing, even in phenolic pistons
- Cost and time savings through non-destructive testing
- Automated testing system for quality control
- Software guided measurement
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
Application & Integration
- Automatic measurement with just one click
- Setting frequency bands for quality control (good/bad statement)
- Calculation of damping or loss factor
- Freely selectable dB values for the attenuation calculation
- Quality factor for damping value
- Vibration measurement with a laser Doppler vibrometer
- Frequency range up to 40kHz
- Frequency resolution < 1Hz to 20kHz
- Automatic measurement report generation
- Data export via ASCII files
Application & Integration
- Quality control
- Series testing
- Material testing
- Research and development
- Product testing
- Model updating
- Damping values of brake pistons
Components
Vibration exciter
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 40kHz
- Impact forces up to 2500N
- High reproducibility
Vibration sensor
The NFT for brake pistons can be operated with the following vibration sensors
- Laser Doppler vibrometer
Measurement data acquisition
4-channel measuring system with synchronous scanning
- AC, DC and IEPE coupling
- Anti-aliasing filter
- 24-bit resolution
- Frequency ranges 1 to 100kHz
- Frequency resolution 100 to 26500 FFT lines
Windows PC
- Standard or industrial PC, also according to customer requirements, with Windows 10/11
Software
The NFT software controls the entire testing process. It includes automatic brake piston measurement (one-click), data analysis, and documentation and report generation.
Specification of the test object
- Name and meta data
- dB values for attenuation calculation (0.5 to 3dB)
- Frequency range 1 to 100kHz selectable
- Frequency resolution (number of FFT lines) selectable
- Frequency bands and permissible tolerance ranges
Measurements for a test object
- Measurements on a component
- Presentation of results and measurement report for a component
What we can do for you
Automatic measurement procedure
- Triggering the automatic modal hammer
- Measurement of the excitation force and the vibration response
- FRF averaging
- Peak picking, attenuation calculation and quality assessment
Report creation and output of results for each examinee
- Custom report template
- Printer, PDF, Excel, CSV, etc.
What we can do for you
In addition to manufacturing and supplying standard measurement systems for determining natural frequency and damping, we design, plan, and develop customized solutions tailored to your requirements. We are also happy to perform the measurements for you as a service.
Please contact us, we will be happy to make you an offer.