Cold drawing, cold rolling production method for high-accuracy weldless steel tube

Abstract

The invention discloses a cold-drawing and cold-rolling manufacturing method of high-precision seamless steel pipe, which comprises the following steps: doing pipe formation procedure for the front part to cut edge of raw material steel, mould round tube, weld, remove the welded burr, detect the standard product to enter subsequent disposing procedure; doing back disposal procedure to heat, beat, wash through acid, phosphorized, saponify; rolling the mould with inner core; annealing; aligning; cutting head and tail; detecting flaw; bulging; testing; packing; storing. The invention saves energy and cost with simple operation and even wall thickness, which can replace common seamless steel pipe, low-middle pressure boiler pipe and steel pipe of the fluid completely.

Description

[0001] This application is a divisional application, the filing date of the original application is September 26, 2006, the application number is 200610152647.1, and the title of the invention is "Production Method of High Precision Seamless Steel Tube". technical field

[0002] The invention relates to a production method of a seamless steel pipe, which is a method for producing a high-precision seamless steel pipe by using strip steel. Background technique

[0003] The production method of existing seamless steel pipe mainly comprises hot rolling pipe production process, cold rolling, cold drawing production:

[0004] The process and the seamless process of the welded pipe expansion force reducing machine have some shortcomings, which are described as follows:

[0005] (1) Hot-rolled tube production process: mainly includes front processes such as surface treatment, cutting, centering, heating, and perforation, as well as rear processes such as tube rolling, leveling, sizi...

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