Girder machining method and girder machining device for crane and crane span collecting-mounting method

Abstract

The invention relates to a girder machining method and a girder machining device for a crane and a crane span collecting-mounting method. The girder machining method for the crane comprises the following steps of step 1, welding girder hanging plates onto corresponding positions of two ends in the length direction of the girder, and enabling the side faces of the girder hanging plates to face the outside of the length direction of the girder; step 2, placing a girder bracket onto a corresponding girder support, fixing by a girder fixing device on the girder support, and utilizing corresponding machining equipment to machine a pressing plane used for being pushed and matched with corresponding matching faces on end beams; step 3, machining thread connecting holes penetrating through the girder hanging plates along the thickness direction in set positions of the girder hanging plates; finally, jointing the end beams with the girder and fixing the end beams and the girder by bolts. By adopting the technical scheme, the collecting-mounting quality of a crane span is prevented from being influenced by welding deformation.

Description

Technical field [0001] The invention relates to a crane main beam processing method, a main beam processing device and a bridge assembly method. Background technique [0002] The crane bridge is a main part of the crane. It includes a main beam 91 and an end beam 92 arranged perpendicular to each other. The end beams 92 are fixed at both ends of the main beam 91 in the length direction. Run on the corresponding bridge track. The crane can be divided into single-beam type and double-beam type according to the number of main beams 91 in the bridge. A type of double-beam crane bridge in the prior art such as figure 1 — image 3 As shown, it includes two main beams 91 with a trolley rail 911 on the top and two end beams 92. The extension direction of the trolley rail 911 is consistent with the length direction of the main beam 91. 92 is fixedly connected together by the main beam hanging plate 93. The structure of the main beam hanging plate 93 is as follows image 3 As shown, it i...

AI Technical Summary

Problems solved by technology

However, due to the need for welding at the end, the deformation caused by welding will have a great impact on the shape of the entire bridge frame, especially on the parameters such as the horizontal and vertical deflection of the cart wheel and the span of the cart, resulting in poor assembly quality. Stable, cannot be assembled interchangeably, cannot realize modularization and mass production, long assembly cycle, prone to wheel gnawing phenomenon during use, and inconvenient maintenance

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