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Extrusion production method of aluminum alloy seamless pipe with external variable diameter

A technology for seamless pipes and production methods, applied in the field of material processing engineering, can solve the problems of high processing cost, large processing volume, low material utilization rate, etc., to reduce processing costs, improve production efficiency and yield, and simple production methods Easy to operate effect

Active Publication Date: 2017-10-03
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of large amount of machining, high processing cost and low material utilization rate in the traditional aluminum alloy seamless pipe processing method, and provide an extrusion production method of aluminum alloy seamless pipe with externally variable diameter. The moving perforating needle head changes the gap between the perforating needle and the extrusion die, thereby changing the outer diameter of the seamless pipe during extrusion, while the inner diameter of the seamless pipe is determined by the size of the perforating needle head, so that it can be extruded Seamless pipes with constant inner diameter and increased outer diameter

Method used

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  • Extrusion production method of aluminum alloy seamless pipe with external variable diameter
  • Extrusion production method of aluminum alloy seamless pipe with external variable diameter

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Embodiment 1

[0022] In order to overcome the problems of large machining volume, high processing cost and low material utilization rate in the traditional aluminum alloy seamless pipe processing method, the present embodiment provides an extrusion production method for an aluminum alloy seamless pipe with an outer variable diameter, which adopts The moving perforating needle 8 changes the gap between the perforating needle 3 and the extrusion die 7, thereby changing the outer diameter of the seamless pipe during the extrusion process, and the inner diameter of the seamless pipe is determined by the size of the head of the perforating needle 3, In this way, seamless pipes with constant inner diameter and increased outer diameter can be extruded.

[0023] Compared with the traditional processing method, the extrusion production method of the outer variable diameter aluminum alloy seamless pipe of the present invention not only greatly reduces the processing cost and processing technology of t...

Embodiment 2

[0025] On the basis of Embodiment 1, this embodiment provides an extrusion production method for an aluminum alloy seamless pipe with an outer variable diameter, and the method includes the following steps:

[0026] 1) During extrusion, the extrusion shaft (1) extrudes the billet (6) along the inside of the extrusion die (7) and the outside of the perforation needle (3) and the perforation needle (8) along the extrusion direction;

[0027] 2) When extruding with variable outer diameter, move the perforating needle (3) along the extrusion direction so that the big end of the perforating needle (8) is located outside the outlet of the extrusion die (7), and the bevel Q of the perforating needle (8) The surface is located at the exit of the extrusion die (7);

[0028] 3) The extrusion shaft (1) continues to extrude the billet (6) to flow along the extrusion direction, at this time, the inner diameter of the seamless pipe remains unchanged and the outer diameter becomes larger;

...

Embodiment 3

[0036] On the basis of Embodiment 2, this embodiment provides an extrusion production method of an aluminum alloy seamless pipe with an outer variable diameter, and the equipment used in the method is a double-action reverse extrusion equipment. The double-action reverse extrusion equipment is a double-action reverse aluminum and aluminum alloy extrusion device disclosed in Chinese Patent Application No. 200820228253.4, which does not belong to the protection scope of the present invention, and is not described in detail here.

[0037] Further, the perforating needle 8 is a bottle needle, and the length of the variable diameter section and the changed outer diameter of the outer variable diameter aluminum alloy seamless pipe are determined by the position of the perforating needle 3 and the angle α of the inclined plane Q of the perforating needle 8. ; This method realizes that the outer diameter of the outer diameter aluminum alloy seamless pipe becomes larger or smaller by co...

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Abstract

The invention provides an external variable-diameter aluminum alloy seamless pipe extrusion production method. The method adopts a movable perforation needle to change a gap between the perforation needle and an extrusion mold so as to change the outer diameter of a seamless pipe in the extrusion process; and the inner diameter of the seamless pipe is determined by the size of the head part of the perforation needle, so that the seamless pipe with invariable inner diameter and increased outer diameter can be extruded. Compared with a traditional machining method, the external variable-diameter aluminum alloy seamless pipe extrusion production method largely reduces the machining cost and the machining process of the aluminum alloy seamless pipe, promotes the productivity and the yield through extrusion machining, and adopts the extrusion machining to totally satisfy the production requirements of a whole long variable-diameter drill rod or an ultralong aluminum alloy seamless pipe.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to an extrusion production method of an aluminum alloy seamless pipe with an outer variable diameter. Background technique [0002] The outer diameter aluminum alloy seamless pipe is used in the petroleum and electric power sectors, especially on the oil drill pipe. Drill pipe plays an extremely important role in the oil drilling industry. Due to its special use environment and working conditions, it requires relatively high mechanical properties of materials, and is generally made of seamless pipes. The current oil drill pipes generally use seamless steel pipes, and most of them adopt the production method of machining after the end piers are thickened. The mechanical properties of the oil drill pipes produced by this method can meet the requirements of use, but the machining volume is large and the processing cost is high. And the material utilization rate is low. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/20
CPCB21C23/20
Inventor 谢东钢黄胜张君侯永超丁建文付永涛
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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