Duotank welds beer tanks error free thanks to Arc-Eye seam tracking system
Duotank builds stainless steel and copper beer tanks with a content of 250, 500 or 1,000 litres. The beer tanks consist of an internal and an external tank with cooling pipes in between. Both tank parts consist of a lid, shell and a bottom. The shell part is rolled in-house to the required diameter, the lid and bottom that are supplied by third parties are welded onto it. The internal and the external tank are welded on both sides at the same time with a semi-automated TIG welding process.
The challenge is tracking the weld seams in the former welding sequence
The lid and the bottom elements are both pressed parts and are never cut 100% centred. For welding that means dealing with a welding trajectory that is not consistent and with a risk of gaps between shell and lid. As only one side is controlled digitally, the communication between both sides is a restricting factor. “The operators needed to observe the weld-seam tracking system painstakingly with a screen. For that reason, the seam-tracking system on the semi-automatic is not quite what we expected,” explained Mark Cox.