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Rifled tube extruding method

A technology of internally threaded pipe and extrusion method, which is applied in the direction of metal extrusion, metal extrusion forming tools, metal processing equipment, etc., can solve the problem of high welding requirements for internally threaded aluminum pipes and raw material copper strips that cannot be produced in a large scale. , poor mechanical properties of products and other problems, to achieve the effect of easy organization of large-scale production, low production cost and high degree of automation

Inactive Publication Date: 2013-01-16
KUNMING UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the internal thread pipe forming technology mainly includes rolling welding forming method and drawing spinning forming method; the former has high requirements for raw material copper strip and welding, high production cost, poor mechanical properties of the product, and is still under development, while the latter is more mature , but due to the high viscosity of aluminum, it is difficult to form by the drawing and spinning method, so the drawing and spinning method is mostly used in the production of internally threaded copper tubes, and there is no literature on the process of large-scale production of internally threaded aluminum tubes

Method used

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Examples

Experimental program
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Embodiment 1

[0022] Embodiment 1: Extrusion steps of the internally threaded aluminum rod of this embodiment: as figure 2 and 3 As shown, after the aluminum rod 1 is cleaned and straightened by the straightening device 2 and the cleaning device 3, it is sent into the die cavity 15 of the tangential continuous extrusion machine, and the feed formed by the extrusion wheel groove 16 and the pressing wheel 17 The material inlet enters the mold cavity, and the temperature of the mold cavity is 480°C (the speed control loop is composed of the speed control system 6, the motor 5, and the signal acquisition device 12) (such as figure 1 (indicated by the middle arrow), fill the tooth grooves of the threaded mandrel 6, and weld it into an internally threaded aluminum tube 10 that meshes with the threads of the threaded mandrel 6. With the rotation of the extrusion wheel, it drives the subsequent continuous feeding and covers the thread The core head 6 is driven by the driving device 5 to make a ci...

Embodiment 2

[0023] Embodiment 2: Extrusion steps of the internally threaded aluminum alloy rod of this embodiment: 3003 aluminum alloy rod 1 is first straightened and cleaned, and then sent into the die cavity 15 of the tangential continuous extrusion machine, and the die cavity temperature is 500 ℃, the feeding port formed by the extrusion wheel groove 16 and the pressing wheel 17 enters the mold cavity (such as figure 1 (indicated by the middle arrow), fill the tooth groove of the threaded core head 6, and weld it into an internally threaded tube 10 that meshes with the threads of the threaded core head 6. With the rotation of the extrusion wheel, it will drive the subsequent continuous feeding and cover the threaded core head 6, and the threaded core head 6 is driven by the driving device 5 to perform circular motion at the same time, and the rotational speed of the circular motion of the driving device 5 Extrusion speed with threaded aluminum tube 10 The following relationship exis...

Embodiment 3

[0024]Embodiment 3: Extrusion steps of the internally threaded copper rod of this embodiment: the copper rod 1 is sent into the die cavity 15 of the tangential continuous extrusion machine, and the feeding port formed by the extrusion wheel groove 16 and the pressing wheel 17 into the mold cavity (eg figure 1 (indicated by the middle arrow) the temperature of the mold cavity is 650°C, filling the tooth grooves of the threaded mandrel 6, and welded into an internally threaded tube 10 meshing with the threads of the threaded mandrel 6, with the rotation of the extrusion wheel, the subsequent continuous feeding is driven And cover the threaded core 6, and at the same time, the driving device 5 drives the threaded core 6 to perform circular motion, the axial movement of the internally threaded pipe 10 along the threaded core 6 is superimposed with the circular motion of the threaded core 6, and the thread teeth on the Each point makes a circular motion on a fixed plane, and the ro...

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Abstract

The invention provides a rifled tube extruding method and belongs to the technical field of continuous extrusion. A metal rod is sent into a die cavity of a tangential continuous extruding machine and enters the die cavity (shown as the arrow in the abstract figure) from a feeding port formed by an extruding wheel groove and a pinch roller to fill a toothed slot of a threaded core mark, a rifled tube in thread mesh with the threaded core mark is welded to drive subsequent continuous feeding and wrap the threaded core mark along with rotation of the pinch roller, a driving device drives the threaded core mark to move circularly, the rifled tube moves axially along the threaded core mark, the movement trail after the axial movement of the rifled tube and the circular movement of the threaded core mark are overlapped forms a helical toothed groove spatially, and a thread is formed on the inner surface of the rifled tube, so that the rifled tube is obtained. Using the method and equipment used with the method can produce products of rifled tubes made of various metal alloys, wherein the rifled tubes include aluminum rifled tubes with special tooth shapes, such as aluminum rifled tubes with high and low teeth and sawtoothed aluminum rifled tubes. Further, the rifled tube extruding method is simple in operation, high in automation level and easy for organization of massive production.

Description

technical field [0001] The invention relates to an extrusion method of an internally threaded pipe, which uses a tangential continuous extrusion machine as a platform to produce various specifications of internally threaded aluminum pipes, and belongs to the technical field of continuous extrusion. Background technique [0002] Internal threaded tube is a kind of high-efficiency and energy-saving heat exchange tube, which is widely used in high-pressure boiler furnace wall tube, refrigeration industry, especially home appliances, automobile air conditioners, etc., and is considered to be an ideal energy-saving and material-saving product. Compared with that, the internal threaded pipe not only expands the internal heat dissipation area by 2-3 times, but also its spiral guide structure makes the medium in the pipe form turbulent flow and improves the heat dissipation coefficient. For example, under the condition of R-22 refrigerant, the light pipe and the Compared with the in...

Claims

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Application Information

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IPC IPC(8): B21C23/02B21C25/00
Inventor 钟毅王飞张治平于孟代娜娜
Owner KUNMING UNIV OF SCI & TECH
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