Description
The quality control test stand makes it possible to fully automatically determine the modal parameters (natural frequencies and damping) of various technical components, to detect deviating parts and to mark/eject them.
This test is particularly essential for the final inspection of aluminum components (porosity, grain coarsening, and geometric deviations), brake pads (shape deviation and pad detachment), or brake discs (coating and cracks). During quality control in production, the modal parameters are characteristics that can be determined quickly.
MAUL-THEET offers a complete system that performs these measurements fully automatically, evaluates them and, if necessary, marks or ejects the component if it deviates from the norm.
Standards and guidelines
Advantages & Innovations
- Crack detection in components
- Detection of blowholes and coarse grain formation
- Detection of geometric deviations
- Detection of brake pad detachments
- Detection of delamination
- Cost and time savings through low personnel costs and non-destructive testing
- Automated test system for determining natural frequencies and damping
- 100% testing compliant with VDA 301 & VDA 302
- User-friendly software
- Very short cycle times
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
Application & Integration
- Fully automatic measurement and evaluation
- 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
- Excitation by automatic modal hammer
- Vibration measurement with a microphone or laser Doppler vibrometer
- Frequency range up to 100kHz
- Frequency resolution < 1Hz to 20kHz
- Automatic measurement report generation
- Central database via LabLINK or SQL
- Data export in ASCII or CSV format
Application & Integration
- Quality control
- Series testing
- End-of-line testing
- 100% inspection
- In-line testing
- Testing of brake components according to VDA 301 and VDA 302
- Natural frequency measurement
- Damping determination
- Determination of resonances
- Component tests
- Material testing
- Prototype study
Components
Excitation unit
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 60kHz
- Impact forces up to 2500N
- High reproducibility
Vibration sensor
The VQC can be operated with the following vibration sensors
- Laser Doppler vibrometer
- Microphone
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 VQC software controls the entire testing process. It includes the automatic measurement of test items in the series, the analysis and communication with the production line control.
System solutions
Specification of the test object
- Component identification via bar or QR code
- 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
Measuring sequence in series
- Start of the measuring process after component positioning has been completed
- Averaging
- Determination of quality parameters (frequency, attenuation, etc.)
- Transmission of the quality decision to the manufacturing and production facility
System solutions
Automatic measurement procedure
- Automatic component positioning
- Triggering the automatic modal hammer
- Measurement of impact force and vibration response
- FRF averaging
- Peak picking, attenuation calculation and quality assessment
- Control for component separation
Output of the test data
- LabLINK connection according to customer specifications
- SQL database connection according to customer specifications
- Printer, PDF, Excel, CSV, etc.
System solutions
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.
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