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A plastic connection method of aluminum alloy pipe fittings based on spinning

A connection method and aluminum alloy technology, which is applied in non-detachable pipe connections, pipes/pipe joints/fittings, passing components, etc., can solve problems such as pipe crushing and deformation, and achieve reliable connection, simple mold, and less damage.

Active Publication Date: 2020-02-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings in the prior art that the pipes are easily crushed and deformed when the thread is tightened, the present invention proposes a method for plastic connection of aluminum alloy pipes based on spinning

Method used

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  • A plastic connection method of aluminum alloy pipe fittings based on spinning
  • A plastic connection method of aluminum alloy pipe fittings based on spinning
  • A plastic connection method of aluminum alloy pipe fittings based on spinning

Examples

Experimental program
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Embodiment Construction

[0054] This embodiment is a socket connection between an aluminum alloy outer tube and an aluminum alloy inner tube using a spinning process; the outer diameter×length×wall thickness of the aluminum alloy outer tube is Φ300×500×15mm, and the The outer diameter × length × wall thickness of the aluminum alloy inner tube is Φ280 × 500 × 15mm.

[0055] The concrete process of this embodiment is:

[0056] Step 1. Forming the alveolar grooves on the outer surface of the connecting end of the aluminum alloy inner tube.

[0057] According to the design requirements, a tooth groove is processed on the outer surface of the connecting end of the aluminum alloy inner tube, and the specific operation is as follows:

[0058] Ⅰ Install the internal rotation mandrel 5 on the connecting flange 1 of the spindle of the spinning machine tool, put the aluminum alloy inner tube into the inner rotation mandrel, and make the connection end of the aluminum alloy inner tube on the inner rotation mandr...

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Abstract

The invention discloses an aluminium alloy pipe fitting plastic connection method based on rotary extrusion. According to the method, tooth form grooves are formed in the outer surface, for outward rotation connection, of the connection end of a small-diameter pipe fitting by an inward rotation technology; O-shaped seal rings are mounted in the grooves; an aluminium alloy inner pipe and an aluminium alloy outer pipe are mounted on a rotary extrusion machine tool in a pre-sleeving manner; metal plastic flow deformation is carried out on the aluminium alloy outer pipe by an outward rotation technology to fill the tooth form grooves and the O-shaped seal rings are pressed to realize sealing connection of the pipe fittings. Compared with the traditional aluminium alloy pipe fitting connectionmethod, the aluminium alloy pipe fitting plastic connection method based on rotary extrusion has the advantages that since the rotary extrusion technology belongs to local point loading, no metal cuttings are generated and metal flow line is not destroyed, the connection process saves labor and reduces damage, and equipment, tooling and molds are simple; and during connection, the plasticity of metal is fully utilized to fill the tooth form grooves and the O-shaped seal rings are pressed, thus achieving environment-friendly and reliable pipe fitting connection with no cuttings and small damage.

Description

technical field [0001] The invention relates to a process method for connecting or sealingly connecting aluminum alloy pipe fittings, and belongs to the technical field of connecting metal pipes. Background technique [0002] Metal pipe fittings are widely used in aviation, aerospace, navigation equipment, automobile manufacturing, petrochemical and other important industrial fields. The connection quality of pipe fittings directly affects the stability and service life of equipment operation. The traditional connection methods of metal pipe fittings usually use threaded connection, groove connection, welding, etc. These connection methods need to process internal and external threads, grooves, or use external heating sources for welding, etc., which will damage the connected pipe fittings. , which weakens the strength of the pipe fitting joints. Therefore, in the gas / liquid working pipeline, the compression resistance and pullout resistance of the pipe fittings after conne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P19/04F16L13/14
CPCB23P19/04F16L13/143
Inventor 詹梅张洪瑞李锐陈淑婉樊晓光高鹏飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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