Integral welding method for ensuring axiality of two side gudgeons in large sized structural member

Abstract

This invention relates to integration welding method for axiality of trunnions on two sides of large-scale constructional element and comprises following steps: segment and partitioning properly for the large-scale constructional element, preprepare the trunnion to trunnion block; use pre-drawn ground sample line, water level, frame level and ceiling hammer on the welding platform to find centers of two ends of every trunnion block and make four centers of two trunnions concentric; assemble sunlight-transparent sheet with small aperture and light source on one trunnion end to observe whether translucidus; use oil prop to adjust fine the trunnion block position till translucent; pre-assemble the segment and trunnion block and take integration welding. This invention solves the technical problem that the axiality of high precision can not or hard be processed on machine tool, cuts production cycle, simplifies technique and workpiece, and final comes to minimum of production cost.

Description

(1) Technical field [0001] The invention relates to large-scale structural parts that cannot or is difficult to complete machining on a machine tool to realize discontinuous parts with higher precision requirements, and is suitable for different parts with larger spacing on the same structure that have higher coaxiality or straightness requirements. A welding method for large-scale structural parts, in particular, relates to an integrated assembling and welding method for ensuring the coaxiality of the trunnions on both sides of the large-scale structural parts. (2) Background technology [0002] Generally, box-shaped welded structural parts have high coaxiality or straightness requirements on both sides. After assembly and welding are completed, machining methods are used to ensure their coaxiality or straightness accuracy requirements. For the same structure The upper spacing is relatively large, and the final requirement is that the distance between the outer ends of the trunn...

AI Technical Summary

Problems solved by technology

[0002] Generally, box-type welded structural parts have high coaxiality or straightness requirements on both sides. After the welding is completed, machining methods are used to ensure the accuracy of coaxiality or straightness. For the same structure The upper distance is relatively large, and it is finally required that the distance between the outer circular end faces of the trunnions on both sides after welding is very large (generally more than 10000mm) within the range of the coaxiality error less than or equal to 1mm. It is conceivable that the coaxiality requirements of the trunnion can be guaranteed under the premise of being able to operate, but the existing equipment (machining equipment and supporting cranes) is quite difficult to complete the machining task of the overall structural parts, and There are unavoidable problems such as high risk factor in tooling design, hoisting scheme formulation and implementation, resulting in poor economic benefits and low technical content of the product, which does not have the value of "technology is productivity"

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