Method for manufacturing plastic forming thin wall three-way pipe with threaded couplings

Abstract

This invention discloses a method for making plastic-shaping light-wall tee pipe with shoulder interface, belonging to common accessories-making technology field for pipe joint, which bears disadvantages of convenient process, less need of equipments and power, and can one-shot form tee pipe and triple screw thread and lower cost. It is characterized in inserting pliofilm in light-wall pipe blank with bipetalous mold, exerting axial force to pliofirm by two side jack-posts, forcing the blank to generate plastic deformation, and forming as the shape of shaping chamber and triple screw thread. The invention is mainly applied in making light-wall tee steel pipe, especially stainless steel pipe, and also in non-metal material pipes.

Description

technical field [0001] The invention relates to the technical field of manufacturing common fittings for pipe connections, in particular to a method for manufacturing a thin-wall tee pipe with a plastically formed threaded joint. Background technique [0002] Tee pipe is an indispensable and common fitting in the connection of liquid conveying pipes. Most of the existing tee pipe manufacturing methods use casting technology. Due to the limitations of the casting process, the wall of the manufactured tee pipe is often thicker, and the thread of the tee pipe generally needs to be turned out by a lathe, resulting in the casting of the tee pipe. The material cost and manufacturing cost are higher. There is another method for manufacturing tee pipes, which uses liquid as the medium for extrusion molding. Its disadvantages are that it requires high sealing performance, and the power required for molding is relatively large, which makes its manufacturing equipment more complex and...

AI Technical Summary

Problems solved by technology

Most of the existing tee pipe manufacturing methods use casting technology. Due to the limitations of the casting process, the wall of the manufactured tee pipe is often thicker, and the thread of the tee pipe generally needs to be turned out by a lathe, resulting in the casting of the tee pipe. Higher material and manufacturing costs

There is another method for manufacturing tee pipes, which uses liquid as the medium for extrusion molding. Its disadvantages are that it requires high sealing performance, and the power required for molding is relatively large, which makes its manufacturing equipment more complex and bulky, and the tee pipe's The three-section interface thread is not formed at the same time

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