Complex welding tasks
The use of a wood pellet stove for heating has risen sharply in recent years, not only in Danish households but also throughout the rest of Europe. "The sharply growing demand caused us production problems, partly as a result of the relatively complex welding work on the internal steel parts of the stoves. "Many of the components are built up of several plate sections with complex welding details", explains CEO René Ramsdahl. "Each product easily involves about 15 to 20 metres of welding that has to be pressure-resistant and in some cases has as many as four different connections in each product. That calls for professional knowledge and the right processing strategy.
Experience gained with 'Mini cell'
"In 2012 we made a start with the robotised welding of small stain-less steel products on a Valk Welding 'Mini cell'. When the volume rose to over 2,000 units a year we took the step a year later to using a larger welding robot on an H-frame. That gave us the extra capac-ity we needed to weld the frames for the internal parts of the wood pellet stoves with the robot. This has also significantly improved the quality of the welding. "The welding robot produces a very precise weld that is the same for each product", says René Ramsdahl.