The following test series was performed for an HBM customer by the “Schweißtechnische Lehr- und Versuchsanstalt Mecklenburg-Vorpommern GmbH.” It proofs the minor impact of spot welding strain gauges to the base material .
HBM strain gauges were welded onto S355G10+M steel (400 x 200mm, t=80mm). The Heller C39 mobile welding device with contact welding gun P05-K was used to install the HBM LS31 strain gauge to the steel material. Before welding, the surface was grinded down to the bare metal surface.
Different test procedures according to DIN EN ISO 15613 were performed afterwards, which are listed below.
- Visual inspection and peel test
- Microscopic examination
- Hardness test