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Hot-rolling seamless steel pipe producing method of double-mandrel combined rolling mill

A technology of seamless steel pipe and double mandrel, applied in metal rolling and other directions, can solve the problems of low production efficiency, small wall reduction, low yield, etc., to improve production efficiency and quality, low production cost, and production efficiency. high effect

Active Publication Date: 2016-12-14
CHANGGE YIMING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of low production efficiency, high energy consumption, low yield, serious environmental pollution, small amount of wall reduction, and only medium-thick-wall seamless steel pipes in the processing of existing seamless steel pipes. The radial structure has irregular cracking and deformation, and the production capacity and quality of seamless steel pipes are low. However, it is possible to provide seamless steel tubes that can be rolled at higher temperatures. The radial structure of steel tubes is not prone to cracking, and the production efficiency of seamless steel tubes is high. A method for producing hot-rolled seamless steel pipes in a twin-mandrel combined rolling mill with high quality and low production cost

Method used

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Examples

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Effect test

Embodiment 1

[0032] A method for producing hot-rolled seamless steel pipes in a twin-mandrel combined rolling mill, such as figure 1 , 2 As shown, the specific steps are as follows:

[0033] Step 1) heating, the tube blank is heated in the tube blank heating furnace 1, and the heating temperature is 1150°C;

[0034] Step 2) Piercing, the heated tube blank is pierced by the piercing unit 2 to make a capillary tube;

[0035] Step 3) The double-mandrel continuous rolling device 3 pierces the rod, and the perforated capillary is turned into the telescopic feeding platform of the double-mandrel continuous rolling device 3, and the telescopic feeding platform is driven to move by the moving platform back and forth, so that The capillary flows into the rotary feeding mechanism of the twin-mandrel continuous rolling device 3 for pre-piercing the mandrel;

[0036]Step 4) Rolling, the capillary tube with the mandrel is selected into the combined rolling mill 4 by the rotary feeding mechanism of t...

Embodiment 2

[0041] A method for producing hot-rolled seamless steel pipes in a twin-mandrel combined rolling mill, such as figure 1 , 2 As shown, the specific steps are as follows:

[0042] Step 1) heating, the tube blank is heated in the tube blank heating furnace 1, and the heating temperature is 1200°C;

[0043] Step 2) Piercing, the heated tube blank is pierced by the piercing unit 2 to make a capillary tube;

[0044] Step 3) The double-mandrel continuous rolling device 3 pierces the rod, and the perforated capillary is turned into the telescopic feeding platform of the double-mandrel continuous rolling device 3, and the telescopic feeding platform is driven to move by the moving platform back and forth, so that The capillary flows into the rotary feeding mechanism of the twin-mandrel continuous rolling device 3 for pre-piercing the mandrel;

[0045] Step 4) Rolling, the capillary tube with the mandrel is selected into the combined rolling mill 4 by the rotary feeding mechanism of ...

Embodiment 3

[0050] A method for producing hot-rolled seamless steel pipes in a twin-mandrel combined rolling mill, such as figure 1 , 2 As shown, the specific steps are as follows:

[0051] Step 1) heating, the tube blank is heated in the tube blank heating furnace 1, and the heating temperature is 1200°C;

[0052] Step 2) Piercing, the heated tube blank is pierced by the piercing unit 2 to make a capillary tube;

[0053] Step 3) The double-mandrel continuous rolling device 3 pierces the rod, and the perforated capillary is turned into the telescopic feeding platform of the double-mandrel continuous rolling device 3, and the telescopic feeding platform is driven to move by the moving platform back and forth, so that The capillary flows into the rotary feeding mechanism of the twin-mandrel continuous rolling device 3 for pre-piercing the mandrel;

[0054] Step 4) Rolling, the capillary tube with the mandrel is selected into the combined rolling mill 4 by the rotary feeding mechanism of ...

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Abstract

The invention belongs to the technical field of production and machining of seamless steel pipes, and particularly relates to a hot-rolling seamless steel pipe producing method of a double-mandrel combined rolling mill. By adoption of the method, seamless steel pipes can be rolled at a high temperature, the radial structures of the steel pipes are not prone to rolling cracks, the production efficiency and the quality of the seamless steel pipes are high, and the production cost is low. The method comprises the specific steps of heating, perforating, penetrating of mandrels of a double-mandrel continuous rolling device, rolling, sizing reshaping, cooling and finished product collecting. The hot-rolling seamless steel pipe producing method of the double-mandrel combined rolling mill has the advantages that the seamless steel pipes can be rolled at the high temperature, the radial structures of the steel pipes are not prone to the rolling cracks, the production efficiency and the quality of the seamless steel pipes are high, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of production and processing of seamless steel pipes, and in particular relates to a seamless steel pipe that can be rolled at a relatively high temperature, the radial structure of the steel pipe is not prone to cracking, and the seamless steel pipe has high production efficiency, high quality and low production cost. A method for producing hot-rolled seamless steel pipes in a twin-mandrel combined rolling mill. Background technique [0002] The production capacity of my country's seamless steel pipes ranks among the top in the world, and it has become a big country in the production of seamless steel pipes. The country has various types of seamless steel pipe hot-rolling, cold-rolling and cold-drawing units, especially the production of small-diameter ultra-thin-wall seamless steel pipes basically relies on traditional The process is completed by cold rolling unit and cold drawing. The production efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B19/02B21B19/04B21B19/10
CPCB21B19/02B21B19/04B21B19/10
Inventor 王萌萌翦铁明路明超
Owner CHANGGE YIMING MACHINERY
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