| 摘要 |
PURPOSE:To perform the automatic build-up welding of a roll such as stainless steel, etc., by moving a build-up welding torch in the axial direction and pouring cooling water from a cooling jig from the lower part of the roll while performing the build-up welding on the upper part of a roll body part by the build-up welding torch. CONSTITUTION:The roll 1 is allowed to abut on both ends of the roll body part 2 by fitting the copper backing 3 in roll axis parts 4 and 4'. The build-up welding is performed from the upper part of the roll body part 2 while moving the build-up welding torch 10 fitted to a carriage 9 in the axial direction combined with rotation of the roll. The cooling jig 11 provided with many small holes on a pipe with a small diameter is provided to the lower part of the roll body part 2 and the cooling water is directly poured on the lower part of the roll body part 2 to cool it. Moreover, since the copper backing 3 is provided, a build-up shortage of both end parts of the roll body part 2 can be prevented. In this way, the roll such as the austenitic stainless steel, etc., of can be realized by the automatic build-up welding and the welding working time can be shortened. |
