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Method and device for forming a large-diameter steel pipe bend

A forming method and large-diameter technology, applied in the field of steel pipe manufacturing and processing, can solve the problem that the same large-diameter steel pipe cannot be bent in two different ways

Active Publication Date: 2020-12-11
山东崇盛冶金氧枪有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the device has great limitations in the use process, and it is impossible to bend the same large-diameter steel pipe into two arcs with different radii. Therefore, it is necessary to invent a new bending pipe forming process and device to break through the limitations of the existing technology. bottleneck

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  • Method and device for forming a large-diameter steel pipe bend

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Effect test

Embodiment 1

[0026] Embodiment 1 A kind of large-diameter steel pipe bending forming device

[0027] Such as figure 1 As shown, a large-diameter steel pipe bending forming device provided by the present invention includes a propulsion device 1 for the end of the steel pipe to be bent, a guide wheel 2, an intermediate frequency inductor 3, an induction coil 4, a first chuck 5, and a second chuck The head 7 and the support seat 9; the first chuck 5 and the second chuck 7 are driven to rotate by the first rocker arm 6 and the second rocker arm 8 respectively, and the rotation directions of the first rocker arm 6 and the second rocker arm 8 are opposite. The lengths of the first rocker arm 6 and the second rocker arm 8 are adjusted separately; the first rocker arm 6 drives the first chuck 5 to bend the steel pipe in an arc shape for the first time, and the second rocker arm 8 drives the second chuck 7 pairs The steel pipe is bent in the second arc shape; the support seat 9 is placed on the su...

Embodiment 2

[0028] Embodiment 2 A kind of large-caliber steel pipe bend pipe forming method

[0029] Such as figure 1 As shown, the present invention provides a method for forming large-diameter steel pipe bends, which can bend the same large-diameter steel pipe with two different radii; the embodiment of the present invention is for the material is 12Cr1MoV, the outer diameter D is 325mm, the wall A steel pipe with a thickness t of 30mm is bent with two radii; the bending process includes the following steps in turn: verification before bending, calculation of the size of the bend, installation of the steel pipe, primary bending, secondary bending, and post-bending correction process.

[0030] Verify before bending:

[0031] a. Check the raw material size, the allowable deviation of the outer diameter of the pipe end is -0.5mm~+2.0mm; the difference between the diameter of one end of the steel pipe and the diameter of the other end shall not be greater than 2.0mm;

[0032] b. The ellip...

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Abstract

The invention discloses a large-caliber steel pipe bending forming device which comprises a first chuck, a second chuck and a supporting seat. The first chuck and the second chuck are driven by a first rocker arm and a second rocker arm to rotate correspondingly. The first rocker arm drives the first chuck to conduct first-time arc bending on a steel pipe, and the second rocker arm drives the second chuck to conduct second-time arc bending on the steel pipe. The invention further discloses a large-caliber steel pipe bending forming technology. The large-caliber steel pipe bending forming technology sequentially includes the specific steps of verification before pipe bending, pipe bending size calculation, steel pipe mounting, primary bending, secondary bending and the correction process after bending. By means of the large-caliber steel pipe bending forming method and device, medium-frequency hot bending can be used for achieving bending with two different radiuses on the same steel pipe; and it is ensured that the thickness of the pipe walls of all parts in the pipe bending forming process is kept unchanged, and under the condition that the pipe bending machining quality is ensured, the steel pipe hot bending machining work efficiency is improved.

Description

technical field [0001] The invention relates to a large-diameter steel pipe bend forming method and device, and belongs to the technical field of steel pipe manufacturing and processing. Background technique [0002] With the development of the domestic pipe fittings manufacturing industry, the manufacturing process of intermediate frequency pipe bends is also constantly improving. At present, the manufacturing process adopted by my country's metal pipe fittings manufacturers is basically the same as that of foreign counterparts, which can be said to be synchronous. Some manufacturing plants have reached the industry-leading level in some aspects. However, compared with foreign counterparts, there are two main gaps between domestic pipe fitting manufacturers. One is that the advanced equipment is not as good as that of foreign countries, and the degree of automation of existing equipment is poor. In addition, the production method based on scattered orders has low productivi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D7/025B21D7/16
CPCB21D7/025B21D7/162B21D7/165
Inventor 姜在彬杨龙
Owner 山东崇盛冶金氧枪有限公司
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