Novel inner circular seam automatic welding mechanism for cylinder assembly

Abstract

The invention discloses a novel inner circular seam automatic welding mechanism for a cylinder assembly. Three seal head holes on an arched tube plate seal head are selected as positioning references. Through a positioning liner plate which is provided with a right opening and is generally used by the three seal head holes, a base plate and the arched tube plate seal head on a positioning bearing block are connected with each other in a positioning mode by using bolts. A cantilever screw rod is arranged on the positioning bearing block and is ensured to be coaxial with a seal head cylinder body. A hand piece of a suspended type submerged arc welding machine is fixed on a nut connecting plate. When a hand wheel is toggled, the nut connecting plate drives the hand piece of the suspended type submerged arc welding machine and a wire reel bracket to move axially. When the positioning bearing block is in spin welding along with the cylinder body, a cantilever screw rod shaft is in a relatively stable state to satisfy automatic welding. The hand piece of the suspended type submerged arc welding machine and an accessory enter the cylinder body through pipe orifices. A cable wire is penetrated into the cylinder body from a pipe orifice close to the central part of the arched tube plate seal head, and is connected and fixed with the hand piece of the suspended type submerged arc welding machine. The cylinder body rotates on a roller frame to perform debugging and alignment on a fixture.

Description

technical field [0001] The invention relates to an automatic welding mechanism for an inner ring, in particular to a novel automatic welding mechanism for an inner ring seam in a cylinder assembly. The utility model belongs to the technical field of welding boilers, pressure vessels and the like. Background technique [0002] At present, in the manufacture of the boiler body, the shell is a large pressure vessel. The welding of the longitudinal circular seam is one of the key processes, and many enterprises have adopted the automatic welding process. For example: DZ, DH series shell-type water-fire tube boilers, both ends of the cylinder are welded to the inner ring seam of the arched tube sheet head. One end is open and one end is closed. The inner ring seam at the opening end can be automatically welded by extending the cross arm in the cross arm type welding operation frame into the cylinder body. The closed weld is the last inner ring seam of the final assembly, whic...

AI Technical Summary

Problems solved by technology

Since the joint form is a Y-shaped groove, the workload of manual welding in the cylinder is relatively large, the working conditions are poor, the efficiency is low and the labor intensity is high, so the repair rate of the weld is also high

Images