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Laser welding aluminum finned tube and processing technology thereof

A laser welding, aluminum finned tube technology, applied in coatings, anti-corrosion coatings, polyacetal coatings, etc., can solve the problems of cumbersome operation of lubricating oil, weak welding, poor corrosion resistance, etc., to improve heat resistance, Ease of cleaning, reduced coating penetration

Pending Publication Date: 2022-03-15
江阴博圣热能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in actual production and application, finned tubes also have many disadvantages, such as poor corrosion resistance, troublesome cleaning, cumbersome operation with lubricating oil during processing, and the disadvantages of loose welding

Method used

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  • Laser welding aluminum finned tube and processing technology thereof
  • Laser welding aluminum finned tube and processing technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Ultrasonic cleaning of the aluminum and stainless steel tubes for 10 minutes and drying.

[0026] Step 2: Put the aluminum tube on the outside of the stainless steel tube, heat the aluminum tube and the stainless steel tube to 530°C, and combine the aluminum tube and the steel tube head together. Cold drawn, annealed to 610°C, straightened.

[0027] Step 3: Fix the aluminum strip at one end of the aluminum tube, wind the prepared aluminum strip, and fix the aluminum strip at the other end of the aluminum tube.

[0028] Step 4: Laser welding is used to weld the aluminum strip to the aluminum tube to obtain a laser welded aluminum finned tube. After laser welding, slowly cool to 470°C at a rate of 40°C / min, hold for 40 minutes, and then cool to room temperature at a rate of 80°C / min.

[0029] Step 5: Add 14.2g of bisphenol A epoxy resin, 2g of tetrabutylammonium bromide, heat and stir, pass in carbon dioxide, add 5g of ethyl acetate, 25ml of deionized water, dis...

Embodiment 2

[0033] Step 1: Ultrasonic cleaning of the aluminum and stainless steel tubes for 5 minutes and drying.

[0034] Step 2: Put the aluminum tube on the outside of the stainless steel tube, heat the aluminum tube and the stainless steel tube to 500°C, and combine the aluminum tube and the steel tube head together. Cold drawn, annealed to 600°C, straightened.

[0035] Step 3: Fix the aluminum strip at one end of the aluminum tube, wind the prepared aluminum strip, and fix the aluminum strip at the other end of the aluminum tube.

[0036] Step 4: Laser welding is used to weld the aluminum strip to the aluminum tube to obtain a laser welded aluminum finned tube. After laser welding, slowly cool to 450°C at a rate of 30°C / min, hold for 30 minutes, and then cool to room temperature at a rate of 70°C / min.

[0037] Step 5: Add 14.2g of bisphenol A epoxy resin, 2g of tetrabutylammonium bromide, heat and stir, pass in carbon dioxide, add 5g of ethyl acetate, 25ml of deionized water, dist...

Embodiment 3

[0041] Step 1: Ultrasonic cleaning of the aluminum and stainless steel tubes for 15 minutes and drying.

[0042] Step 2: Put the aluminum tube on the outside of the stainless steel tube, heat the aluminum tube and the stainless steel tube to 560°C, and combine the aluminum tube and the steel tube head together. Cold drawn, annealed to 620°C, straightened.

[0043]Step 3: Fix the aluminum strip at one end of the aluminum tube, wind the prepared aluminum strip, and fix the aluminum strip at the other end of the aluminum tube.

[0044] Step 4: Laser welding is used to weld the aluminum strip to the aluminum tube to obtain a laser welded aluminum finned tube. After laser welding, slowly cool to 500°C at a rate of 50°C / min, hold for 50 minutes, and then cool to room temperature at a rate of 90°C / min.

[0045] Step 5: Add 14.2g of bisphenol A epoxy resin, 2g of tetrabutylammonium bromide, heat and stir, pass in carbon dioxide, add 5g of ethyl acetate, 25ml of deionized water, dist...

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Abstract

The invention discloses a laser welding aluminum finned tube and a machining process thereof. A composite pipe of a stainless steel pipe and an aluminum pipe is adopted, an aluminum strip is wound on the aluminum pipe, and under the protection of helium, the aluminum finned pipe is subjected to laser welding and is slowly cooled. Meanwhile, the corrosion-resistant film is attached, the modified bisphenol A type epoxy resin is added to improve the corrosion resistance, and the modified polyether sulfone is added, so that the finned tube has corrosion resistance, high-temperature resistance and antifouling performance and has a protection effect on the finned tube, and the service life of the finned tube is prolonged. According to the machining process, lubricating oil does not need to be used in the machining process, the production efficiency is improved, the production cost is saved, and the heat exchange effect is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum tube processing, in particular to a laser-welded aluminum finned tube and a processing technology thereof. Background technique [0002] As a process equipment in heat transfer, heat exchangers are widely used in industrial fields, and their performance directly affects the efficiency of energy utilization. Therefore, a comprehensive performance analysis of the material and structural dimensions of the heat exchanger is a work that has both theoretical guiding significance and practical engineering application value. Finned tube heat exchangers have the advantages of simple processing and assembly, high temperature and high pressure resistance, high reliability, strong adaptability, and a wide range of material selection. They are widely used in air conditioning, refrigeration, chemical and other industrial fields. In the prior art, finned tubes are generally pipes with higher ductility and heat...

Claims

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Application Information

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IPC IPC(8): B21C37/22C09D163/00C09D159/02C09D181/06C09D5/08C09D7/63C09D7/65
CPCB21C37/22C09D163/00C09D5/08C09D7/63C09D7/65C08L2201/08C08L59/02C08L81/06C08L71/00C08L83/04C08K5/18C08K5/101
Inventor 陆烨星
Owner 江阴博圣热能科技有限公司