Method of dismantling a cooling tube in a stator tooth and tool used therefore

摘要

The invention concerns a method of dismantling a cooling tube (1) of polymer material and an elongate cutting tool used in said method. According to the method said tube (1) being fixed in an axially running cooling duct (2) in a stator tooth (3) of a stator (4) of a high-voltage rotating electric machine is cut at an axial level close to the stator (4) at both ends of the stator tooth (3). Then the cutting tool having a radially protruding cutting edge is inserted into the cut tube (1) at one of said ends, said tool being forced through the tube (1) along said duct (2) thereby slitting the tube (1) from inside. Thereafter the slit tube (1) is pulled out of the duct (2) with a twisting movement that causes breakage of the tube wall along the slit (7) and thus reduction of the tube diameter.