| 摘要 |
PURPOSE:To make the welding machine compact and lightweigh and easily attachable and detachable by fitting with winding to a weld pipe an endless ring which is endlessly connecting a torch holding device, filler metal feeding device, driving device, etc. and by making the beveling weldable. CONSTITUTION:The holding device 3 of a torch 2, filler metal feeding device 4 and driving device 5 are connected by connecting member 6 and the both end parts thereof are combined freely separatedly and unitedly by combining device 7 and the endless ring is formed. Said device 3 and device 4 equip a travelling device and the device 5 equips a motor 5a and driving wheel 5c. Said endless ring equips a length adjusting device 8 and is fitted with winding on the outer peripheral face of a welding pipe 9 and engaged without looseness with the outer peripheral face of the welding pipe 9 with the length being adjusted. It then welds the edge 9a with circulatorily rotating on the pipe outer peripheral face by said driving device 5. |
