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Large-wall-thickness seamless steel tube super-long upsetting device and using method thereof

A technology of seamless steel pipe and thick pier, which is applied in the direction of forging/pressing/hammer device, furnace type, furnace, etc., can solve the problems affecting processing efficiency, folding, and affecting product processing pass rate, so that it is not easy to fold, install and disassemble convenient effect

Active Publication Date: 2020-04-24
NANTONG YONGDA PIPE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After the existing large-wall thick seamless steel pipe is super-long (heating length reaches 1m to 1.2m) intermediate frequency heating, it is easy to appear that the straightness of the heating part of the pipe end is very poor The phenomenon of folding appears on the surface, and the serious bending will seriously affect the processing efficiency in the later stage. After the folding occurs, it will seriously affect the processing pass rate of the product

Method used

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  • Large-wall-thickness seamless steel tube super-long upsetting device and using method thereof
  • Large-wall-thickness seamless steel tube super-long upsetting device and using method thereof
  • Large-wall-thickness seamless steel tube super-long upsetting device and using method thereof

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Embodiment 1

[0037] see Figure 1-6 , a large-wall thick seamless steel pipe ultra-long thick pier device and its use method, comprising an intermediate frequency induction furnace 1, the left end of the intermediate frequency induction furnace 1 is fixedly connected with an L-shaped mounting plate 2, and the inner wall of the L-shaped mounting plate 2 is fixedly connected with a pair of cylinders 3. The output end of the cylinder 3 is fixedly connected with the movable mold 4, and the intermediate frequency induction furnace 1 is equipped with a heating chamber 5, the movable mold 4 is located in the heating chamber 5, and the heating chamber 5 is equipped with a core rod, and the diameter of the core rod is as thick as required The inner diameter of seamless steel pipe 8 is generally 1.8mm-2mm smaller than the inner diameter. The end diameter of the core rod is generally 68% of the final outer diameter that needs to be thickened. The outer end of the core rod is fixedly connected with a f...

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Abstract

The invention discloses a large-wall-thickness seamless steel tube super-long upsetting device and a using method thereof, which belong to the technical field of steel pipe upsetting. According to thescheme, a seamless steel pipe is subjected to super-long heating; the heating part of the seamless steel pipe is not easy to bend; the folding phenomenon of the inner wall of the seamless steel pipeis reduced; after seamless steel tube upsetting forming, cooling water in a water tank is sprayed out through a spray head to form cooling water mist; a movable mold and the seamless steel pipe are cooled; water subjected to heat exchange is collected through a return pipe; water is pumped into the water tank through a water pump; water in the water tank is recycled; liquid nitrogen in a liquid nitrogen box circularly flows in a spiral pipe through a pneumatic pump; high-temperature water is cooled; nitrogen formed after heat exchange is pressurized through an infusion pump, so that nitrogen is pressurized and liquefied again; and by means of the property that a memory alloy ring is prone to deformation at a low temperature, the seamless steel pipe can be taken more conveniently after forming is completed.

Description

technical field [0001] The invention relates to the technical field of steel pipe pier thickening, and more specifically relates to a super-long pier thickening device for a large-wall-thick seamless steel pipe and a method for using the same. Background technique [0002] Seamless steel pipes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in construction, such as steel scaffolds, are used to make ring parts with steel pipes, which can improve the utilization rate of materials, simplify the manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/08B21J9/08B21J17/02B21J13/02B21K29/00
CPCB21J5/08B21J9/08B21J17/02B21J13/02B21K29/00
Inventor 徐培林
Owner NANTONG YONGDA PIPE IND
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