The HeatTreatmentCongress is the biggest industry meeting for the heat treatment branch in Europe and a forum for exchange and innovation. This year’s main topics included heat treatment in the age of “Industry 4.0” and innovations in the field of measurement technology in the field of heat treatment. Topics that drive QASS and commit us to innovation. That’s why we were there.
Self-learning measuring systems from QASS inspect non-destructive and detect faults such as:
- Grinding overheating, e. g. on gear shafts
- Cracks in workpieces or tools
- Mix-up of components
- Quality of the raw material
- Hardness measurement (Rockwell, Brinell, Vickers…)
Detection Of Grinding Burns On Gear Shafts With QASS µmagnetic
During the production of hardened workpieces, such as gear shafts, grinding burns can occur: tempered areas in the material as well as undesired new hardening zones.
The comparison “intact” to “damaged” is based on the determined energy sums for the measuring signal from undamaged and damaged components. The QASS µmagnetic measuring system uses the effect of the magnetic Barkhausen noise to determine the mechanical hardness at different depths of ferromagnetic materials, non-destructive and in-process, without penetrating the material.
The video on the right shows: between damaged and intact components there is a clear difference in the measurement signals. The test works at different rotational speeds; the variations in the signal image of the damaged shaft correspond to the characteristic of the abrasive flame, which consists of strictly located areas of soft and harder zones. On average, the mechanical hardness of the damaged component is considerably reduced.
In this video we want to detect overheating during grinding of gear shafts with the new measurement system QASS µmagnetic.
Test Fot Mixed-Up Components
Test for mixed-up metal components: QASS measuring systems can test the used raw material or the components to be mounted for correctness. Each material has its own magnetic structure, deviations in the carbon content or in the hardness state also cause the magnetic fingerprint to deviate.
Use QASS µmagnetic to check the delivery condition of your raw material or carry out a mix-up test on parts after heat treatment.
QASS µmagnetic detects the magnetic fingerprint of material and/or components, of workpieces that have been delivered and distinguishes between hard and unhardened materials as well as between drawn or undrawn and rolled or unrolled materials.
QASS µmagnetic is sensitive to microstructural changes, which can result from mechanical processing or heat treatment, and compares the measured values with the reference state.
The Future Of Crack Detection
In automated industrial manufacturing processes, the separation efficiency in crack detection increases from now on – non-destructive and in-process: With the 3D-pattern recognition from QASS, the measuring system is able to filter out interfering signals to a large extent – even signals that are similar to a crack event.
Up to now, QASS measurement systems have achieved their outstanding selectivity on the basis of a threshold value analysis. Now the system uses the entire signal and achieves an even more precise distinction between “cracked” and “not cracked”, with even lower false-positive and false-negative rates.
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