A forging plant in the Sauerland region of Germany invested in a double-acting hammer of the Chinese manufacturer Baixie. With the support of the general importer of Baixie products to Germany, Ferrolink GmbH in Remscheid, KTI engineers cushioned the vibrations from the hammer by means of a direct spring suspension without additional weight.
Forge hammers generate strong vibrations. Residual vibrations in the vicinity may, however, not exceed the standards according to DIN 4150. For the firm Kröger Stahlumformung GmbH in Attendorn the question therefore arose: how can vibration insulation be provided for this double-acting hammer with a weight of 51 tonnes and a hammer force of 31.5 kJ, and at low cost?
The solution realised by the KTI engineers was the construction of a direct spring suspension for the hammer without steel plate or concrete block as extra weight. That reduces costs significantly, as it means there is not only no further need for additional weight, but the foundation pit will have smaller dimensions. Fewer and smaller spring isolators are also required.
The KTI team constructed and supplied six spring isolators for direct spring suspension with integrated KTI safety damping for reducing hammer movements. This is achieved by the damper plunger being suspended in a high-viscose and stable-temperature damping mass. The result: the first direct spring suspension for a Chinese hammer in Germany.
KTI engineers designed their solution on the basis of the technical data. After manufacture and delivery, the customer assembled the spring isolator and commenced operations with the double-acting hammer. KTI tested the vibrations on site. The customer has since then being working with the suspension trouble-free. This KTI solution again shows the flexibility, short delivery times and low cost that are now characteristic for this supplier. KTI has in the meantime also implemented this solution with three further Baixie hammers in Brazil.