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Cold drawing precision honing tube manufacture method

A manufacturing method and cold-drawn pipe technology, which are applied in the field of steel pipe preparation, can solve the problems that yield strength and dimensional deviation cannot meet the requirements of use, restrict the development of cold-rolled steel pipes, and rely on imports of seamless steel pipes, and achieve high rotational deformation resistance and resistance. Abrasiveness, extended service life, good impact toughness at low temperature

Inactive Publication Date: 2016-08-24
WUXI SHENLU HYDRAULIC PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the drawing processing method performed by a drawing machine can efficiently manufacture cold-worked steel pipes compared with the rolling processing method performed by a pilger rolling machine. This seamless steel pipe is used for hydraulic cylinders and pneumatic cylinders. At present, the yield strength and dimensional deviation of the highest steel grade stipulated by the current domestic standards cannot meet the actual requirements for the use of hydraulic cylinders and pneumatic cylinders, so that my country's seamless steel pipes for hydraulic cylinders and pneumatic cylinders can only rely on imports. Restricted the development of cold-rolled steel pipe in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Taking the preparation of a 27SiMn steel pipe with a diameter of 145.3mm and a hole wall thickness of 8.23mm as an example, the following steps are included:

[0024] (1) Heating: Heat the 27SiMn tube blank to 1200°C in a ring furnace for 4 hours to ensure uniform heating of the tube blank;

[0025] (2) Perforation: The heat pipe billet is pierced by a piercer, and the temperature of the capillary tube formed after piercing is controlled at 1150°C, and the perforation eccentricity is controlled at 4%. The pipe billet is visually inspected to remove burrs, Warped skin, if there are obvious pits, scratches and cracks that are visible to the naked eye on the surface of the tube blank, they should be removed to avoid flowing into the next process to control the surface quality of the tube blank;

[0026] (3) Annealing: introduce the tube blank into a continuous annealing furnace for annealing, and control the annealing temperature to 600°C and the annealing time to 70 minut...

Embodiment 2

[0044]Taking the preparation of a 27SiMn steel pipe with a diameter of 136.9mm and a hole wall thickness of 8.29mm as an example, the following steps are included:

[0045] (1) Heating: Heat the 27SiMn tube blank to 1290°C in a ring furnace for 5 hours to ensure uniform heating of the tube blank;

[0046] (2) Perforation: The heat pipe billet is pierced by a piercer, and the temperature of the capillary formed after piercing is controlled at 1230°C, and the perforation eccentricity rate is controlled at 4%. The pipe billet is visually inspected to remove burrs, Warped skin, if there are obvious pits, scratches and cracks that are visible to the naked eye on the surface of the tube blank, they should be removed to avoid flowing into the next process to control the surface quality of the tube blank;

[0047] (3) Annealing: introduce the tube blank into a continuous annealing furnace for annealing, and control the annealing temperature to 720°C and the annealing time to 90 minute...

Embodiment 3

[0061] Take the preparation of a 27SiMn steel pipe with a diameter of 147.4mm and a hole wall thickness of 8.02mm as an example, including the following steps:

[0062] (1) Heating: Heat the 27SiMn tube billet to 1250°C in a ring furnace for 4.5 hours to ensure uniform heating of the tube billet;

[0063] (2) Perforation: The heat pipe blank is pierced by a piercer, and the temperature of the capillary tube formed after perforation is controlled at 1200°C, and the perforation eccentricity rate is controlled at 4%. The tube blank is visually inspected to remove the burrs on the surface of the tube blank. Warped skin, if there are obvious pits, scratches and cracks that are visible to the naked eye on the surface of the tube blank, they should be removed to avoid flowing into the next process to control the surface quality of the tube blank;

[0064] (3) Annealing: introduce the tube blank into a continuous annealing furnace for annealing, and control the annealing temperature t...

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Abstract

The invention relates to a cold drawing precision honing tube manufacture method comprising the following steps: heating, heating a tube blank in an annular furnace; perforation, using a perforator to perforate the hot tube blank; annealing, annealing the tube blank; spraying borax, descaling; hot rolling, guiding the annealing tube into a tube grimper for hot rolling; detaching tube, detaching the rolled tube from a core rod; stress relieving, guiding the rolled tube into the heating furnace so as to obtain an annealing tube blank; pickling processing, removing surface rust scale; phosphatization processing, forming a zinc phosphate chemical generation overlay film on the surface; saponification processing, forming a metallic soap lubrication overlay film; primary cold drawing, cold drawing a to-be-cold drawn tube blank; secondary cold drawing, secondarily cold drawing the cold drawing tube after the primary cold drawing, thus obtaining a cold drawn tube; heat treatment, reducing residual stress; honing, using a numerical control honing machine; hot straightening processing; obtaining the cold drawing precision honing tube. The cold drawing precision honing tube obtained by the method is good in integration performance, precise in sizes, and excellent in oil storage performance.

Description

technical field [0001] The invention belongs to the technical field of steel pipe preparation, and in particular relates to a method for manufacturing a cold-drawn precision honed pipe. Background technique [0002] As cold working methods of steel pipes for machine structural use such as carbon steel, alloy steel, or stainless steel, there are known drawing methods by a drawing machine and rolling methods by a pilger mill. Among them, the drawing processing method performed by a drawing machine can efficiently manufacture cold-worked steel pipes compared with the rolling processing method performed by a pilger rolling machine. This seamless steel pipe is used for hydraulic cylinders and pneumatic cylinders. At present, the yield strength and dimensional deviation of the highest steel grade stipulated by the current domestic standards cannot meet the actual requirements for the use of hydraulic cylinders and pneumatic cylinders, so that my country's seamless steel pipes for h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 吴建兴
Owner WUXI SHENLU HYDRAULIC PARTS
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