Manufacturing method of UOE (uing-oing-expanding) straight seam steel pipe expanded taper

Abstract

The invention discloses a manufacturing method of a UOE straight seam steel pipe expanded taper. The method comprises taking hot processed die steel forging as the body materials of the expanded taper, forging the body materials to obtain the body of the expanded taper, machining an central inner hole and outer surface conical rounds of the body and integrating a core spindle, an expanding sleeve and the body into a whole; machining a large end surface and twelve inclined surface of the surface of the body in a machining center, rough-milling a long groove in the middle of every inclined surface, and machining the deep holes of the large end surface and the oil hole of every inclined surface; decomposing the expanding sleeve and the core spindle, and performing quenching thermal treatment on the surface of the body; reassembling an expanding sleeve and a core spindle, then finish-milling a T-type groove in the long groove of each inclined surface of the body through a T-type groove cutter and then decomposing the expanding sleeve and the core spindle; machining every grade of inner hole of the body to a finish size through a planer type milling machine, grinding every inclined surface through a guideway grinder, performing flaw detection on the finished expanded taper, reexamining the size and completing the manufacturing process. The manufacturing method of the UOE straight seam steel pipe expanded taper simplifies the machining process, improves the machining efficiency, reduces the production cost and guarantees the manufacturing precision of the expanded taper.

Description

technical field [0001] The invention relates to a manufacturing method of a UOE straight seam steel pipe expanding cone. Background technique [0002] The large-diameter thick-walled welded steel pipe has a wide range of applications. It is not only used for laying long-distance high-pressure oil and gas pipelines, but also has been extended to use gas and liquid as driving force to transport ore, grain, oil, coal, etc. In engineering construction, it is used for subsea tunnels, subsea piling, breakwaters and offshore oil production platforms, etc., and in other fields, it is also used for high-pressure vessels, rack shells, etc. At present, the most economical and efficient way to produce such steel pipes is undoubtedly the UOE (Uing-Oing-Expanding) forming process. It is mainly a process of pressing the steel plate into a round tube through a U-machine die and an O-machine die and then welding it into a steel tube. However, the roundness of the inner diameter of the stee...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the expanding cone and inconvenient processing, the processing technology is complicated, the processing efficiency is low, and the cost is high

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