Vacuum brazing process of an aluminum plate-fin oil-water composite cooler

A composite cooling and brazing process technology, applied in the field of brazing process and vacuum brazing process, can solve the problems of less than 20% of the first-time yield, lack of in-depth influence rules, late start and other problems, and achieve good microstructure and welding seam. quality, improve the quality of brazing, the effect of improving the pass rate

Active Publication Date: 2017-05-31
GUIZHOU YONGHONG AVIATION MACHINERY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to China's late start in this field and relatively backward technology, the conventional vacuum brazing process and furnace feeding method cannot stably produce coolers with this structure in batches, and the first-time yield is less than 20%.
The root cause is that there is a lack of in-depth and systematic research on the influence of the vacuum brazing process parameters and the placement of the cooler core in the vacuum furnace on the quality of the cooler brazing seam. Therefore, it is impossible to obtain stable and high-quality products. It is difficult to mass-produce ultra-thick and large aluminum plate-fin oil and water composite coolers that meet the requirements due to the appropriate process method of the brazing seam and the placement method in the furnace

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vacuum brazing process of an aluminum plate-fin oil-water composite cooler
  • Vacuum brazing process of an aluminum plate-fin oil-water composite cooler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] A vacuum brazing process for an aluminum plate-fin oil and water composite cooler includes the following steps:

[0026] (1) Fin molding, parts cleaning, and parts assembly molding;

[0027] (2) Core placement: such as figure 1 As shown, since the cooler core 2 is divided into an oil cavity 201 and a water cavity 203, and the thickness structure of the oil cavity 201 and the water cavity 203 is quite different, there is an intermediate channel 202 between the oil cavity 201 and the water cavity 203 It is difficult to maintain the uniform temperature of the cooler core 2 during brazing. In order to improve the brazing uniformity of the cooler core 2, it needs to be staggered in the furnace cavity 1. The dislocation distance of the product end surface is X, X is not Less than 150mm, the distance between the windward surfaces of the two rows of product water chambers is Y, and Y is not less than 50mm;

[0028] In the core placement step, the dislocation distance X of the end fac...

experiment example 1

[0044] Taking the production of 5 batches of 800 sets of oil and water composite coolers as an example, the specific test content and data are as follows.

[0045] Experiment content: clean the cooler, dry it in a constant temperature and humidity drying room after cleaning, and then assemble and calibrate to ensure that the height of each part is within the tolerance range, the cleanliness of the parts meets the requirements, and the matching gap between the parts is 0.1 Within mm, the cooler core 2 is placed in the furnace cavity 1 according to the placement method described in the embodiment, and vacuum brazing is carried out according to the process parameters shown in Table 1, and the air tightness test and blasting are carried out after brazing. Test detection and fatigue strength detection, the test results are shown in Table 2, Table 3, and Table 4.

[0046] Table 1 Brazing conditions

[0047] Temperature section Temperature rise / fall time Holding time Vacuum degree / Pa ...

experiment example 2

[0058] Taking the production of 5 batches of 800 sets of oil and water composite coolers as an example, the specific test content and data are as follows.

[0059] The content of the experiment is the same as that of Test Example 1. Vacuum brazing is performed according to the process parameters shown in Table 5. After brazing, air tightness test detection, blasting test detection and fatigue strength detection are performed. The test results are shown in Table 6, Table 7, and Table 8. Show.

[0060] Table 5 Brazing conditions

[0061] Temperature section Temperature rise / fall time Holding time Vacuum degree / Pa 150-200℃ 30min 80-90min(4.0-4.5)×10 -2

380-400℃ 40min 90-100min(7.0-8.0)×10 -3

500-530℃ 50min 90-100min(4.0-5.0)×10 -3

560-570℃ 20min 110-120min(2.0-3.0)×10 -3

590-600℃ 15min 30-40min(1.0-2.0)×10 -3

620-630℃ 10min 35-45min(0.9-1.0)×10 -3

610-615℃ 5min 30-40min2.0×10 -3

600-605℃ 5min 40-50min1.5×10 -3

[0062] The test results are as follows:

[0063] Table 6...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
bursting strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a vacuum brazing process of an aluminum plate fin oil and water composite cooler, and belongs to the technical field of welding processes; and the vacuum brazing process comprises such steps as core placement and vacuum brazing. Cooler cores are arranged in a furnace cavity in a staggered manner, so that the temperature homogenization effect of parts in the furnace is improved; meanwhile, a temperature section of 150-200 DEG C is added for fully drying products to guarantee the vacuum degree in the furnace cavity so as to lay a favorable environment foundation for vacuum brazing of the product; and such temperature sections as 560-570 DEG C, 590-600 DEG C, 620-630 DEG C, 610-650 DEG C and 600-605 DEG C are arranged, so that the powerful guarantee is provided for high-temperature homogenization of the cores, the wetting, the spreading and the filling of brazing filler metal are facilitated, excellent brazing lines are formed, and the pass percent of the products is obviously improved.

Description

Technical field [0001] The invention belongs to the technical field of welding technology, and relates to a brazing process, in particular to a vacuum brazing process for an aluminum plate-fin oil and water composite cooler. Background technique [0002] The ultra-thick aluminum plate-fin oil and water composite cooler is mainly used in heavy-load high-speed locomotives, air compressor equipment and other fields, and the market prospect is good. Especially in recent years, the industries of heavy-duty high-speed locomotives, high-speed locomotives, and large-scale air compressors have developed rapidly. The demand for ultra-thick aluminum plate-fin oil and water composite coolers is increasing. Vacuum brazing is currently produced. The main means of class cooler. The size of the conventional radiator structure is generally length×thickness×height=200~1500mm×30~180mm×150~800mm, while the ultra-thick aluminum plate-fin oil and water composite cooler generally has the size of lengt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008
CPCB23K1/0008B23K1/008B23K2101/14
Inventor 张剑波张轩杨显容
Owner GUIZHOU YONGHONG AVIATION MACHINERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap