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Novel continuous skew rolling process for seamless steel pipe

A seamless steel pipe and new process technology, applied in metal rolling, instruments, calculations, etc., can solve the problems that affect the production efficiency and product quality of hot-rolled metal seamless steel pipe units, the number of hot-rolling equipment, and the heat loss.

Inactive Publication Date: 2014-11-12
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the entire production process of seamless steel pipes requires a large number of hot-rolling equipment, large weight, large floor space, large temperature drop of rolled pieces, and high heat loss, which affects the production of hot-rolled metal seamless steel pipe units. efficiency and product quality

Method used

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  • Novel continuous skew rolling process for seamless steel pipe
  • Novel continuous skew rolling process for seamless steel pipe
  • Novel continuous skew rolling process for seamless steel pipe

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Embodiment Construction

[0033] In the present invention, the heated tube billet is sent to the main machine of skew rolling, and the rolling start temperature is maintained at 1100°C~1200°C. The main machine of skew rolling is equipped with rolling pipe rolls, piercing rolls, sizing rolls, reducing rolls, and leveling rolls. The center distance between each adjacent two groups of rolls is 600mm. The tube blank first passes through the perforated rolls of the skew rolling main machine, and the piercing is started by cross rolling. The diameter of the hole throat of the piercing part is adjustable from 25 to 38mm The feeding angle of the perforating roll is adjustable from 4° to 15°, and the rolling angle is adjustable from 0° to 8°.

[0034] The perforated capillary tube enters the tube rolling roll, and the blank tube is obtained after continuous rolling by the perforating roll and the tube rolling roll. The diameter of the hole throat of the tube rolling part is 25~38mm. Type ejector rod, which is a...

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Abstract

The invention belongs to the technical field of seamless steel pipe hot rolling processes and relates to a novel continuous skew rolling process for a seamless steel pipe. A plurality of groups of rollers are arranged on a rack, certain parameters are set according to a calculation formula, multiple processes such as perforation, pipe rolling, flattening and rounding during seamless steel pipe production are integrated together, perforation, rolling and the like of a pipe blank are completed in one step, and a finished product pipe is obtained by adopting a continuous skew rolling method. The novel continuous skew rolling process for the seamless steel pipe has the advantages that the machining equipment is reduced, the working cost is decreased, the working efficiency is improved, an intermediate reheating furnace can be omitted, metals with small temperature zones or being difficult to deform can be rolled, and hot finished product pipes with high quality can be directly obtained.

Description

technical field [0001] The invention belongs to the technical field of hot-rolling seamless steel pipes, in particular to a continuous cross-rolling process for seamless steel pipes. Background technique [0002] At present, the cross rolling method has been widely used in the production process of seamless steel pipes, such as in the processes of piercing, rolling, leveling, etc., but they are all used in independent processes. Therefore, the entire production process of seamless steel pipes requires a large number of hot-rolling equipment, large weight, large floor space, large temperature drop of rolled pieces, and high heat loss, which affects the production of hot-rolled metal seamless steel pipe units. efficiency and product quality. Contents of the invention [0003] The present invention provides a seamless steel pipe continuous cross-rolling process to solve the above-mentioned problems in the prior art, so as to shorten the process flow, reduce production costs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B23/00G06F19/00
Inventor 双远华王清华双志宏王付杰
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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