Marine low-speed diesel engine rack monolithic welding method

Abstract

The invention aims to provide a novel marine low-speed diesel engine rack monolithic welding method. The assembling and welding sequence is optimized according to marine low-speed diesel engine rack monolithic welding parts, weld joint layout and quality requirements. According to the method, the mode of assembling and welding a web plate, guide rail plates and then wing plates in the existing marine low-speed diesel engine rack monolithic welding sequence is changed; and the guide rail plates and the wing plates are assembled and welded firstly, and then the two sets of guide rail plates andwing plates are assembled and welded together through the web plate. Due to the fact that the overall welding mode is adjusted to separate welding and then assembly welding, the weight of a single setof welding bodies is reduced, the complexity is reduced, ground level operation can be achieved, climbing is not needed, the safety production risk is effectively reduced, a special welding supporting tool does not need to be manufactured, and the production cost is saved. Rack monolithic welding is carried out according to the assembling and welding sequence, the risk of falling from high altitude can be avoided, the production efficiency is improved, the production cost is reduced, and the welding quality is guaranteed.

Description

technical field [0001] The invention relates to the field of manufacturing a marine power frame, in particular to a single-piece welding method for a marine low-speed diesel engine frame. Background technique [0002] When manufacturing a marine low-speed diesel engine frame, it is necessary to assemble and weld the frame pieces inside the frame first, and then perform the overall assembly and welding of the frame. The single piece of the frame is large in size, many parts are involved in assembly and welding, and the requirements for welding quality and welding forming dimensional accuracy are high. To meet these welding requirements, we need to design a reasonable assembly and welding sequence, comprehensively considering factors such as welding stress, welding deformation, welding efficiency and the safety of on-site operators. [0003] The welding sequence of the existing frame is as follows: Figure 1-3 Shown: [0004] figure 1 : First assemble the welded guide rail...

AI Technical Summary

Problems solved by technology

[0008] The existing welding sequence leads to the need to place the single piece of the frame vertically on the support tooling in order to improve the welding efficiency when assembling the welding triangle plate, and the welder uses the welding position of the horizontal welding for welding

The inventor found that this method requires the production of special support tooling and aerial work platforms to form additional cost expenditures, and there are also potential safety hazards for operators, and the single-piece welding of the frame also requires multiple flips and hoisting, resulting in low production efficiency; at the same time, this method Horizontal welding operation is required, and its welding quality is not as good as welding in the flat welding position

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