Electric-melted pipeline press-fitting process, press-fitting tool and press-fitting tool manufacturing process

Abstract

An electric-melted pipeline press-fitting process comprises the following steps of performing oxide layer removing and polishing operation on the surface of an electric-melted pipeline inserting part, polishing an extremely thin surface layer, and keeping the cylindricity precision of the polished part basically unchanged; selecting a pressing disc, an electric-melted direct pipe fitting, an elbow pressing frame and a tee pressing frame pressing tool which are matched with the pipeline and the pipe fitting which are to be assembled, and mounting the pipeline and the pipe fitting on the pressing tool; and synchronously rotating a nut, and driving the pipeline and the pipe fitting to move oppositely in a relative spiral rotation mode to finish spiral press-fitting assembly of the pipeline and the pipe fitting. And then electrifying and welding are conducted. The invention further relates to a press-fitting tool and a manufacturing method of the press-fitting tool; after the press-fitting tool is used, the welding quality can be guaranteed through the assembly interference magnitude of the electric-melted pipeline and the pipe fitting, the welding quality cannot be affected by the small interference magnitude, and the threshold value of the interference magnitude is much larger than that of the prior art; and the press-fitting tool has the advantages that the whole device is simple, the operation is convenient, the process is suitable for space-limited and high-altitude environment operation, and the application range is wide.

Description

technical field [0001] The invention relates to the field of pipeline clamps, in particular to a press-fitting process for electric fusion pipelines, which adopts a spiral press-fitting process, and also relates to a press-fitting tool for press-fitting electric-fusion pipelines, which is treated by the press-fitting tool during assembly The assembled pipes are fixed to ensure the assembly accuracy, and the manufacturing process of the press-fitting tools is also involved. The press-fitting tools that match the pipes are manufactured according to the actual conditions of the pipes to be assembled, so as to ensure that the pipes and fittings required for assembly are met to the greatest extent. Interference fit requirements can also make the installation and matching method simple and easy, reduce labor intensity, save working hours, and be safe. Background technique [0002] Industrial steel skeleton polyethylene plastic composite pipes and pipe fittings are a new type of do...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is: the pipes in the prior art are difficult to assemble due to their heavy weight and often work at heights, and if the interference is reduced for assembly, the leakage-proof requirements cannot be met;

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