A Butt Welding Production System of Crane Main Girder Web

Abstract

A butt welding production system for crane main girder webs in the field of crane bridge welding manufacturing, including hanging beams, rotating plate frames and two portal frames; both portal frames include top beams, and the top beams are There are RV slide rails on the surface, and house-type trolleys are installed on the RV slide rails. The two house-type trolleys are equipped with vertical lifting mechanisms for synchronous lifting of the lifting beams; the upper surface of the lifting beams is equipped with robot slide rails. An assembly welding robot is installed; two lug boxes are symmetrically fixed at both ends of the lower surface of the hanging beam, and the inner sides of the bottom ends of the two lug boxes are respectively connected to the two ends of the rotating plate frame by rotation, and the lower surface of the rotating plate frame is along the The rotating plate frame is evenly equipped with multiple magnetic components for absorbing the web in the axial direction; this group of butt welding production system can complete the longitudinal weld between the web and the cover plate after the web is quickly and accurately hoisted and positioned, and the web Automatic welding of vertical welds between ribs.

Description

technical field [0001] The invention relates to the field of welding and manufacturing of crane bridges, in particular to a butt welding production system for webs of crane main beams. Background technique [0002] The main beam of the crane is generally a box structure. As the main load-bearing component of the whole machine, it is mainly composed of the upper and lower cover plates, the webs on both sides and the ribs in the middle of the beam box. The welding sequence of the main beam is generally to first The arranged ribs and the lower cover are welded and positioned, and then the webs are aligned through the fixture, and then spot welding or broken welding is performed on the web and the ribs, and the web and the cover, and the main beam is welded for the next step. Be prepared for the welding of the seams; because the crane web is long and is a plate splicing structure, the plates of the main girder webs need to be tailor-welded before assembly. Due to the existence o...

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Problems solved by technology

[0002] The main girder of the crane is generally a box structure. As the main load-bearing part of the whole machine, it is mainly composed of upper and lower cover plates, webs on both sides and ribs in the middle of the beam box; the welding sequence of the main girder is generally to first weld several The arranged ribs and the lower cover are welded and positioned, and then the web is assembled through the fixture, and then the web and the rib, and the web and the cover are spot-welded or broken-welded for the next step to perform internal welding of the main girder Welding of the seam should be prepared; because the length of the web of the crane is long and it is a plate splicing structure, the plates of the main girder web need to be tailor-welded before assembly, and the tailor-welding station can ensure that the web is assembled The waviness after welding; however, when butt-welding the tailor-welded web, the cover plate and the rib plate, the existing production process needs to manually clamp the crane hook to the edge of one side of the web and lift it, so that the main girder The web is turned from flat to vertical state, which will easily cause plastic deformation of the web during the lifting process, which directly causes the wave degree of the web group to become worse after the pairing, which cannot meet the requirements. In addition, because the crane is manually controlled for lifting, Not only is the work efficiency low, but it is also difficult to guarantee the hoisting accuracy; more importantly, the current production process is spot welding after manual assembly. Due to the small operable space inside the main girder and the harsh manual welding environment, not only the welding quality and The welding accuracy cannot be guaranteed, and the welding efficiency is low, so that the entire bridge manufacturing process cannot achieve the goal of automatic and rapid production

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