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Internal heating and pressurizing pipe distortion rectification device and method

A technology of internal heating and pressurized tubes, which is applied in the direction of metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of easily changing mold shape and size, achieve the effects of improving forming performance, avoiding environmental pollution, and reducing production costs

Inactive Publication Date: 2012-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the shape and size of the mold are easy to change if the tube blank and the mold are heated at the same time and then the shape is corrected when correcting the shape of the high-strength pipe, and to provide a pipe that uses internal heating and pressure Calibration device and method

Method used

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  • Internal heating and pressurizing pipe distortion rectification device and method
  • Internal heating and pressurizing pipe distortion rectification device and method
  • Internal heating and pressurizing pipe distortion rectification device and method

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a pipe shape correction device using internal heating and pressurization in this embodiment includes a booster cylinder 17 and a pressurized tube 18, and the pipe shape correction device also includes an upper slider 1, an upper mold base 2, The mold insert 3, the lower mold base 4, the heating source 6, the support block 8 and the lower table 9, the lower table 9 is horizontally arranged on the ground, and the upper slider 1, the upper mold base 2 and the lower mold base 4 are sequentially arranged from top to bottom Set on the lower table 9, the mold insert 3 is embedded between the upper mold base 2 and the lower mold base 4, the support block 8 is arranged on the lower table 9 in the mold insert 3, and the heating source 6 is arranged on the support block 8, And the connecting end between the heating source 6 and the outside is sealed on the support block 8, the upper die base 2 is pro...

specific Embodiment approach 2

[0021] Specific implementation mode two: combination Figure 6 The present embodiment will be described. The heat source 6 of the present embodiment is an induction coil 10 wound in a helical shape. With such arrangement, the pipe blank 7 is heated by induction heating, and the heating speed is fast, and the local temperature control of the pipe material can be realized by adjusting the shape, size and position of the induction coil 10 . Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0022] Specific implementation mode three: combination Figure 7 To illustrate this embodiment, the heating source 6 of this embodiment includes an induction coil 10 and a solid mandrel 11 , the induction coil 10 is helically wound on the solid mandrel 11 , and the solid mandrel 11 is set on the support block 8 . With such arrangement, the heated solid mandrel 11 heats the tube blank 7 by means of radiation, and the heating speed is faster than the heating by only the induction coil 10, and the temperature of the tube blank is more stable. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an internal heating and pressurizing pipe distortion rectification device and an internal heating and pressurizing pipe distortion rectification method, relates to a pipe distortion rectification device and a pipe distortion rectification method, and aims to solve the problem that the shape and size of a die are easily changed to influence a distortion rectification effect if distortion is rectified after a pipe billet and the die are simultaneously heated when the distortion of a strong-strength pipe is rectified. According to the device, an upper sliding block, an upper die holder and a lower die holder are sequentially arranged on a lower tabletop from top to bottom; a die insert is inserted between the upper and lower die holders; a support block is arranged on the lower tabletop in the die insert; a heating source is arranged on the support block; and an air vent communicated with an inner cavity of the die insert is reserved in the upper die holder. The method comprises the following steps of: placing a pipe billet of which the distortion is to be rectified on the lower die holder in a sealed way; heating the pipe billet; introducing high-pressure gas into the pipe billet; bulging the pipe billet of which the distortion is to be rectified, and gradually attaching the pipe billet to the inner cavity of the distortion rectification insert to finish the distortion rectification; and after the distortion rectification is finished, relieving the high-pressure gas, taking the distortion-rectified pipe billet out, and cutting undistorted areas at the two ends to finish the distortion rectification of the pipe. The device and the method are used for the distortion rectification of the pipe.

Description

technical field [0001] The invention relates to a pipe shape correction device and method, in particular to a pipe shape correction device and method using internal heating and pressure. Background technique [0002] Most of the large-diameter pipes in industrial production are processed and manufactured by thin plate welding, and non-circular or irregular cross-sections often appear after welding. At present, the method of adding a rigid mold inside the tube blank or passing a high-pressure medium into the tube blank is mostly used for round calibration. The method of internally adding a rigid mold to calibrate the circle has the disadvantages of complicated equipment and poor interchangeability. Each pipe of a specification needs a set of matching molds, and the cost is high. The method of introducing high-pressure medium into the tube blank is to deform the original tube blank under the action of internal pressure to achieve circle calibration. The method has simple pro...

Claims

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Application Information

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IPC IPC(8): B21D3/00B21D37/16
Inventor 郑凯伦何祝斌黄冠姜梦刘鸣祁中宽苑世剑
Owner HARBIN INST OF TECH
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