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Internal laser cladding of barrels with the newly developed Mini-ID cladding head

: Kubisch, Frank; Pfennig, Martin; Brückner, Frank; Nowotny, Steffen

Associazione Italiana di Metallurgia -AIM-; International Federation for Heat Treatment and Surface Engineering -IFHTSE-:
Heat treatment and surface engineering. CD-ROM : From tradition to innovation. European Conference on Heat Treatment 2015 & 22nd IFHTSE congress, Venice (Italy), 20 - 22 May 2015
Milano: AIM, 2015
ISBN: 978-88-98990-03-0
European Conference on Heat Treatment <2015, Venice>
International Federation for Heat Treatment and Surface Engineering (IFHTSE Congress) <22, 2015, Venice>
Conference Paper
Fraunhofer IWS ()
barrel; depth of immersion; inner laser cladding; integrated fiber; long-term process; MINI-ID; small

The task of the work presented here was to develop an inner diameter laser cladding head for internal cladding of barrels with a length up to 1800 mm and an internal diameter of 58 mm. The small dimensions were a big challenge for the cladding process and especially for the cladding head. So it was necessary to develop a new slim process head to reach the small and long internal depth of immersions. The new optic design of the MINIID includes many advantages of the former established IWS ID cladding head COAXID and further special features. The big challenge was to integrate all media supply like powder, water cooling, and inert gas as well as to include all optic components like optical fiber cable, lenses, mirror and finally a process control camera plus a thermocouple element. On the basis of the high immersion depth and the small diameter it was really necessary to integrate a process and temperature monitoring system. The new design of the head has enabled us to clad barrels with a minimum diameter of 50 mm. Depending on the length of the barrels even a minimum diameter of 43 mm with an immersion depth of 280 mm is possible. The head is modularly designed and can be extended in steps of 500 mm to a total immersion depth of 3000 mm. In summary the newly developed MINIID head is capable to deliver our requirements for inner cladding barrels with small dimensions.