Method for welding special-shaped flange pipelines and welding tool

Abstract

Disclosed are a method for welding special-shaped flange pipelines and a welding tool. The method includes steps: firstly, assembling in a three-dimensional analog manner by the aid of software; secondly, deriving a manufacturing drawing of a special-shaped flange pipeline according to a three-dimensional model; thirdly, manufacturing various parts of a workpiece according to the drawing of the special-shaped flange pipeline; and fourthly, determining a three-dimensional position of a flange plate by the aid of the welding tool on the basis of another flange plate, and connecting the parts of the pipeline. Accordingly, the special-shaped flange pipeline is accurately welded. The method for welding the special-shaped flange pipelines and the welding tool have the advantages that the accuracy of the shape and the position of a waste gas outlet pipe of a supercharger of a diesel engine, namely the special-shaped flange pipeline, can be ensured, accordingly mounting precision of later-stage assembly is guaranteed, and the special-shaped flange pipeline is directly assembled. In addition, owing to the high accuracy of the appearance and the shape of the special-shaped flange pipeline, the method and the welding tool are also applicable to batch production of multiple parts, and production efficiency is enhanced.

Description

technical field [0001] The invention relates to a pipeline installation method and tooling, for example, a welding method and welding tooling for special-shaped flange pipelines suitable for low-speed diesel engine supercharger exhaust gas outlet pipes. Background technique [0002] The exhaust gas outlet pipe of the low-speed diesel engine supercharger is one of the key components assembled with the supercharger, exhaust pipe and scavenging box. It is composed of three parts: upper and lower flanges and connecting pipes. The general welding method is on-site welding. It is to consider that the accumulative assembly errors of the scavenging box, exhaust pipe, supercharger and other components can be solved by on-site welding of the exhaust gas outlet pipe. Due to the narrow space of the assembly site, the production efficiency of the on-site welding method is low, and the assembly quality is even more difficult to guarantee, which not only takes up the time of driving and we...

AI Technical Summary

Problems solved by technology

Due to the narrow space of the assembly site, the production efficiency of the on-site welding method is low, and the assembly quality is even more difficult to guarantee, which not only takes up the time of driving and welding equipment in the general assembly plant, but also increases the waiting time for the main engine assembly stop; Due to the influence of accumulative assembly errors of components such as gas tanks and exhaust pipes, the on-site welding method often has the phenomenon that the drawing lofting size does not match the actual situation and requires on-site measurement; what is more serious is that the exhaust gas outlet pipes produced by on-site welding are not interchangeable and cannot be used more centralized production

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