Technique for molding inclined connector saddle between main pipe and branch pipe as well as welding method

Abstract

The invention discloses a saddle forming process for an interface between main pipe and branch pipe with an inclination angle and a welding method thereof. The saddle forming process comprises the following steps: a metal block consistent with outside dimension of the main pipe and the branch pipe is punched, an elliptical hole is punched on the metal block according to the inner diameter of the branch pipe, the elliptical hole is stretched to be a boss according to the inclination angle between the main pipe and the branch pipe, the metal block is punched according to the outer diameter of the main pipe to form a curved surface consistent with peripheral curvature of the main pipe, the surplus part of the metal block periphery is cut off according to the size of a welded surface, etc. The welding method comprises the following steps: a hole is drilled at the place where the main pipe needs a branch; one end of the branch pipe is welded with the boss of the saddle; and the curved surface on the saddle consistent with the peripheral curvature of the main pipe is jointed and welded with the borehole position on the main pipe, etc. The saddle forming process for the interface between the main pipe and the branch pipe with the inclination angle and the welding method thereof guarantee the welding flatness and the welding intensity, and avoid the obstruction resulting from inserting the branch pipe into the main pipe.

Description

technical field [0001] The present invention relates to a method of welding a branch pipe on a main pipe, more specifically, the present invention relates to a saddle forming process for the interface between a metal main pipe and a branch pipe at an arbitrary inclination angle and a saddle forming process for connecting a metal main pipe and a branch pipe welding method. Background technique [0002] Due to the special structure of the automobile engine, in the metal cooling pipeline for automobiles, it is necessary to cool down the engine with circulating fluid. Insulation and heating are carried out in special parts, so it is necessary to separate many branch pipelines in the main pipeline for metal cooling. However, many of the branch pipes used for these branch pipes are neither parallel nor perpendicular to the main pipe, and they form different spatial angles with the main pipe. [0003] In order to meet the above requirements, the existing branching method is: dril...

AI Technical Summary

Problems solved by technology

[0004] (1) The welding area is only the wall thickness of the main pipe, and it is difficult to ensure the flatness of the welding surface, resulting in poor welding strength;

[0005] (2) The welding method of inserting branch pipes on the main pipe is very easy to block the main pipe, thus causing accident hazards

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