Spinning mechanism and method for forming corrugated pipe

A corrugated tube and corrugated technology, applied in the field of spinning processing, can solve the problems of many welds and complicated processes

Active Publication Date: 2015-05-13
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 disadvantages of complex processes and many welds in the prior art, the present invention proposes a spinning mechanism and spinning method for forming bellows

Method used

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  • Spinning mechanism and method for forming corrugated pipe
  • Spinning mechanism and method for forming corrugated pipe
  • Spinning mechanism and method for forming corrugated pipe

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0050] This embodiment is a spinning mechanism for forming bellows.

[0051] The formed bellows are LF3 aluminum alloy pipe fittings. The shape of the bellows is composed of straight wall sections and corrugated sections alternately. The outer diameter of the straight wall section is 370mm, and the wall thickness is 5mm. The height H of the corrugation is 20mm, and the root fillet radius R of the outer surface of the corrugated section 1 7mm, the top fillet radius R of the outer surface 2 is 25mm, the root fillet radius r of the inner surface of the corrugated section 1 is 12mm, the top fillet radius of the inner surface is r 2 is 20mm, and the wall thickness t is 5mm.

[0052] This embodiment includes a mandrel 1, four clamping blocks 3, a straight wall mandrel 5, a corrugated mandrel 10, a mandrel end cover 8, a rotary wheel 6 for powerful spinning, a rotary wheel 9 for forming corrugations, and a correcting rotary wheel 11. Wherein: the mandrel is set on the mandrel ...

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Abstract

The invention discloses a spinning mechanism and method for forming a corrugated pipe. A core shaft is sleeved with a core die which is sleeved with a blank, and the blank is fixed through four clamping blocks located at one end of the core shaft (1). The core die comprises a straight-wall core die body and a corrugated core die body, and in the process of forming the corrugated pipe, different core die bodies are selected according to different processes. Through three times of spinning, the size precision of the finally formed part is guaranteed, integrated plastic forming of the corrugated pipe in the whole process is achieved, in this way, plastic work hardening occurs, the obtained corrugated pipe is free of splicing, and the mechanical property of the workpiece is improved.

Description

technical field [0001] The invention belongs to the field of spinning processing, in particular to a spinning mechanism and spinning method for forming bellows. Background technique [0002] Aluminum alloy corrugated pipe fittings are widely used in military defense, aerospace, oil exploration, oil and gas transportation and other industrial fields due to their light weight and corrosion resistance. Bellows is a tubular part composed of straight wall sections and corrugated sections alternately, where each corrugated section is composed of three arcs, namely the top arc and two root arcs. The traditional corrugated pipe forming method is to first press the convex groove on the slab, then longitudinally round and weld it to form a short corrugated pipe, and finally process the multi-section short corrugated pipe through axial tailor welding to form the final finished corrugated pipe. The above-mentioned traditional forming methods use many kinds of processes, including four ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16
CPCB21D22/16
Inventor 杨合詹梅马飞陈建华石丰李利境
Owner NORTHWESTERN POLYTECHNICAL UNIV
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