The invention relates to an induction heating device, which comprises at least one induction coil mounted to a support frame (15). The support frame is adapted to travel on a surface (51a, 52a) of anannular metal article (50) to be heated and comprises a wheel set having one or more driving wheels (21, 22, 23, 24). The support frame (15) is adapted to travel on a side face (51a, 52a) of the annular metal article (50) and is provided with first and second guide elements, wherein the first guide elements engage with an outer circumferential surface (51c) of the annular metal article and the second guide elements engage with an inner circumferential surface (52c) of the annular metal article, to ensure that the device travels on a circular path during heating.