Connecting method for magnetic pulse forming auxiliary brazing metal pipes

A technology for magnetic pulse forming and metal pipe fittings, which is applied in welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of difficult welding of large-size pipe fittings, etc., and achieve the goals of improving brazing efficiency, facilitating automatic production, and promoting energy saving and emission reduction Effect

Inactive Publication Date: 2017-07-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the limitation of ultrasonic energy, ultrasonic brazing is difficult to weld large-size pipe fittings. In addition, in order to obtain higher

Method used

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  • Connecting method for magnetic pulse forming auxiliary brazing metal pipes
  • Connecting method for magnetic pulse forming auxiliary brazing metal pipes
  • Connecting method for magnetic pulse forming auxiliary brazing metal pipes

Examples

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Example Embodiment

[0071] Example 1

[0072] A method for connecting aluminum alloy and copper pipe fittings assisted by magnetic pulse forming, using an aluminum alloy pipe with an outer diameter of 20mm, an inner diameter of 18mm, and a wall thickness of 1mm and a copper pipe with an outer diameter of 15mm, an inner diameter of 11mm, and a wall thickness of 2mm as two A kind of base material, the Zn-3wt%Al foil that thickness is 0.15mm is brazing material, and CsAlF is brazing flux, and concrete brazing method comprises the following steps:

[0073] (1) if figure 1 and figure 2 As shown, take one base material 1 (aluminum alloy tube) and one base material 2 (copper tube), their dimensions are respectively De20mm×1mm and De15mm×2mm, and take Zn-3wt%Al brazing filler metal foil (melted The temperature is 380℃~400℃) and its size is 25mm×47.1mm×0.15mm; at this time, the base metal 1 is the outer tube, and the base metal 2 is the inner tube. Wrapping the brazing material foil on the base metal 2...

Example Embodiment

[0076] Example 2

[0077] A connection method for brazing aluminum alloy and copper pipe fittings assisted by magnetic pulse forming, using a copper tube with an outer diameter of 20mm, an inner diameter of 18mm, and a wall thickness of 1mm, and an aluminum alloy pipe with an outer diameter of 15mm, an inner diameter of 11mm, and a wall thickness of 2mm. A kind of base material, the Zn-3wt%Al foil that thickness is 0.15mm is brazing material, and CsAlF is brazing flux, and concrete brazing method comprises the following steps:

[0078] (1) if figure 1 and figure 2 As shown, take one base material 1 (copper tube) and one base material 2 (aluminum alloy tube), and their dimensions are respectively De20mm×1mm and De15mm×2mm, and take Zn-3wt%Al solder foil (melted The temperature is 380℃~400℃) and its size is 25mm×47.1mm×0.15mm; at this time, the base metal 1 is the outer tube, and the base metal 2 is the inner tube. Wrapping the brazing material foil on the base metal 2 requir...

Example Embodiment

[0081] Example 3

[0082]A method for connecting aluminum alloy and copper pipe fittings assisted by magnetic pulse forming, using a copper pipe with an outer diameter of 20mm, an inner diameter of 18mm, and a wall thickness of 1mm and an aluminum alloy pipe with an outer diameter of 15mm, an inner diameter of 11mm, and a wall thickness of 2mm as two A kind of base material, the pure tin foil sheet that thickness is 0.2mm is brazing filler metal, and CsAlF is brazing flux, and concrete brazing method comprises the following steps:

[0083] (1) if figure 1 and figure 2 As shown, take one base material 1 (copper tube) and one base material 2 (aluminum alloy tube). , whose size is 25mm×47.1mm×0.2mm; at this time, the base metal 1 is the outer tube, and the base metal 2 is the inner tube, and the brazing material foil is wrapped around the tube wall port of the base metal 2 that needs to be brazed, and then the base metal 1 and the base metal 2 wrapped with the brazing foil ar...

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Abstract

The invention discloses a connecting method for magnetic pulse forming auxiliary brazing metal pipes. The connecting method comprises the following steps that two metal pipes needing to be connected are divided into an inner pipe and an outer pipe according to the diameter size; brazing filler metal is laid on the outer wall of the inner pipe; the inner pipe and the outer pipe are connected in a sleeving mode, and the sleeved connection area between the inner pipe and the outer pipe is adjusted and aligned; magnetic pulse discharging forming is conducted on the sleeved connection area formed by the inner pipe and the outer pipe through an electromagnetic forming coil by means of an electromagnetic forming machine; heating brazing is conducted on the sleeved connection area formed by the inner pipe and the outer pipe through a heating coil by means of an electromagnetic induction heating device. According to the connecting method, the purpose that the dissimilar metal pipes are directly brazed in a common environment is achieved, the problems generated in efficient brazing filler metal distribution and a vacuum welding environment in dissimilar metal pipe brazing are solved, the brazing efficiency is improved, and automated production is convenient to achieve; the connecting method is green and environmentally friendly and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a connection method for brazing metal pipe fittings assisted by magnetic pulse forming. Background technique [0002] At present, the problems of environmental protection and resource consumption are becoming more and more serious. With the continuous development of high-tech fields such as automobiles, ships, and aerospace, how to save energy, reduce emissions and save resources is the focus of social attention. Aluminum alloy has low density, high strength, good plasticity, excellent electrical conductivity, thermal conductivity and corrosion resistance, copper has excellent electrical conductivity, thermal conductivity, corrosion resistance and good weldability, and is an excellent heat exchanger﹑ Pipeline production materials, aluminum alloy tubes and copper tubes have been widely used in aviation, aerospace, automobiles, machinery manufacturing, ships and chemical industrie...

Claims

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Application Information

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IPC IPC(8): B23K1/00B23K20/06B23K28/02
Inventor 黄尚宇雷雨王梓宇肖勇杜学铭胡建华孟正华周梦成邹方利颜士伟
Owner WUHAN UNIV OF TECH
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