CN105510145B - The mold that heat-exchanger fin is tested with aluminium foil sag resistance - Google Patents
The mold that heat-exchanger fin is tested with aluminium foil sag resistance Download PDFInfo
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- CN105510145B CN105510145B CN201510845367.8A CN201510845367A CN105510145B CN 105510145 B CN105510145 B CN 105510145B CN 201510845367 A CN201510845367 A CN 201510845367A CN 105510145 B CN105510145 B CN 105510145B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of molds tested with aluminium foil sag resistance for heat-exchanger fin, including a pedestal；A pair is spaced from each other the surface platform being fixed on pedestal, which is located in the same horizontal plane and with a pair of opposed facing parallel seamed edge, and a center line is determined between the parallel seamed edge；This is divided into the pressing plate on platform, for a strip sample to be pressed on plane on corresponding platform from both ends respectively with a pair.This mold eliminates influence of the aluminium foil free end length to sink-resistance performance value when being fixed using one end, and makes the effective length of all aluminium foils to be checked consistent, and free end length caused by avoiding artificially is not equal and the test error of generation, result are more acurrate, reliable.
Description
Technical field
The invention mainly relates to a kind of sag resistance test moulds, more particularly to a kind of heat-exchanger fin that is used for be resisted with aluminium foil
The mold of sag test.
Background technology
Car heat exchanger is the important component of car engine cooling system, and traditional heat exchanger all uses copper
As the main material of heat exchanger, this is because copper has good formability, thermal conductivity, corrosion resistance and soldering property.In recent years
Carry out heat exchanger gradually to light-duty, efficient, economic trend development, the calorize rate of automobile is also stepping up, aluminum heat exchange
Device is gradually instead of copper heat exchanger.Since rust-preventing aluminum alloy has light-weight, good heat dissipation effect, energy saving, durable, assembly and disassembly side
Just, low cost, practicality and it is economical many advantages, such as, therefore in aluminum-made heat exchanger, corrosion resistance can be used good
Rust-preventing aluminum alloy material replaces Cu alloy material.
The overlooking structure diagram of car heat exchanger is as shown in Figure 1.Heat exchanger includes mainly extruded tube I, cooling fin
II.Extruded tube in heat exchanger is mainly formed by fine aluminium or Al-Mn systems alloy extrusion, and cooling fin, that is, heat-exchanger fin uses
Alloy foil band or Composite Brazing Aluminium Foil band.Brazing material (skin material) and parent metal (core material) are pressed certain cladding by composite insulating foil
Than being used through certain combination process lamellar composite, compound good aluminium foil is brazed on extruded tube together.Currently, heat exchange
Between device fin is 0.06mm~0.1mm with aluminium alloy foil material finished product thickness, which need to be existed by high temperature and extruded tube soldering
Together.In brazing process, so thin aluminium foil will continue closely in the environment of 580 DEG C~610 DEG C of high temperature and certain pressure
Ten minutes, it is easy to collapse sagging, cause scrapping for heat exchanger.The study found that aluminium alloy composite insulating foil occur it is sagging
Two main causes, wherein it is most important the reason is that, simulation soldering after, the skin material of fusing is expanded along the crystal boundary of core material metal
It dissipates, corrode core material makes the section of core material become smaller, and reduces the section bending strength of metal, causes to occur sagging；Secondly because high
Under temperature, core material metal recrystallizes, and reduces the intensity of itself.
In order to ensure that the good welds of heat-exchanger fin and extruded tube, heat-exchanger fin need to have good sag resistance
Performance.Sink-resistance performance is the ability that itself sagging deflections is resisted under certain temperature and the effect of certain load.Therefore needs pair
Aluminium foil carries out the measurement of sink-resistance performance, and the ability of high temperature deformation is resisted to evaluate aluminium foil in brazing process.It is main in industry
The sink-resistance performance of aluminium foil is measured with reference to the test method of the Japanese low-temperature welding committee.
The schematic view of facade structure of the sag resistance test mould of the Japanese low-temperature welding committee is as shown in Figure 2 a, passes through handle
The first end III of aluminium foil to be checked is fixed, and second end IV freely dangles, and carries out simulation soldering.It is sagging after aluminium foil simulation soldering to stand
Face schematic diagram is as shown in Figure 2 b.This method has certain limitation：This method is in simulating brazing process, free end length pair
The influence of sink-resistance performance value is very big, and the free end length the long under similarity condition, and the sagging value measured is bigger, and this method is adopted
Device can not accurately ensure that free end length is equally long；And its result only has sagging value to characterize, and has ignored the shadow of load
Ring, it is inconsistent with practical soldering situation because when practical soldering, be extruded tube-fin-extruded tube-fin-extruded tube in this way
Collocation welding, two can give fin certain pressure loading between extruded tube and extruded tube；The test method to sample and
Assembling process is more demanding, even same material, if sample and assembly are improper, will obtain different results；In addition, the party
Device used by method, sag of chain needs manually measure, and measurement error is big, and touching is very easy in measurement process
Aluminium foil causes aluminium foil to deform.
Invention content
The purpose of the present invention is to provide the molds that a kind of heat-exchanger fin is tested with aluminium foil sag resistance, above-mentioned to overcome
Defect of the existing technology.
To achieve the goals above, the present invention provides a kind of moulds tested with aluminium foil sag resistance for heat-exchanger fin
Tool, including a pedestal；A pair is spaced from each other the surface platform being fixed on pedestal, which is located at same
In a horizontal plane and there is a pair of opposed facing parallel seamed edge, a center line is determined between the parallel seamed edge；With one
To being divided into this to the pressing plate on platform, for a strip sample to be pressed on corresponding platform plane from both ends respectively
On.The main experimental purpose of heat-exchanger fin aluminium foil sag resistance experiment can be realized in the technical program.
In addition to this, above-mentioned mold can also include a pair of parallel guide roller tangent with the horizontal plane from below, institute
Center line of the guide roller between the parallel seamed edge is stated symmetrically to arrange.It is flat due to being additionally arranged a pair being arranged symmetrically
Row guide roller, it is more helpful to improving experiment.
Further, above-mentioned mold further includes one group of locating slot, for being tried the strip in the centerline direction
Sample is positioned.The locating slot is upwardly extended from the pedestal, forms the cylinder with lower end and upper end, the upper table of the upper end
Face is higher by plane certain distance on the platform.
Further, above-mentioned mold further includes one group of fixation gage, which fixes gage with that group of locating slot with institute
State the center line symmetrical setting between parallel seamed edge.The fixed gage is upwardly extended from the pedestal, formed have lower part and
The upper surface of the cylinder on top, the top is higher by plane certain distance on the platform.The fixation gage is marked from lower part to top
There is continuous length scale value.
Further, above-mentioned mold further includes cylinder counterweight, its both sides is born against in the locating slot when pressurization is installed
On the fixed gage, center is fallen on the center line between the parallel seamed edge.
In addition, the mold of above-mentioned heat-exchanger fin aluminium foil sag resistance experiment further includes one group of bolt, for connecting
Platform and pressing plate are stated to clamp the strip sample.
Preferably, above-mentioned mold further includes one group of drawing pin, for fixing the strip sample and the pressing plate.
The mold tested with aluminium foil sag resistance of heat-exchanger fin of the present invention can compare same material and wait inspecting
Deformability of the sample under different loads, it is also ensured that the load applied on the sample to be checked of different materials is identical, obtains
Result comparison it is strong.By measuring counterweight weight used and reading the scale of fixed gage, more acurrate can easily obtain
Obtain the sag of chain of aluminium foil to be checked and the ability of anti-deforming.Particular, it is important that the sag resistance test mould proposed makes
All aluminium foils to be checked effective length it is consistent, eliminate it is artificial when being fixed using one end caused by free end length it is not equal and produce
Raw error, result are more acurrate, reliable.
Description of the drawings
Fig. 1 is the overlooking structure diagram of car heat exchanger；
Fig. 2 a are the schematic view of facade structure of the sag resistance test mould of the Japanese low-temperature welding committee；
Fig. 2 b are according to facade signal sagging after the simulation soldering of the sag resistance test mould of the Japanese low-temperature welding committee
Figure；
Fig. 3 is sag resistance test mould structural upright schematic diagram according to a first embodiment of the present invention；
Fig. 4 a are the sag resistance test mould and heat exchanger wing before simulating Braze tests according to a first embodiment of the present invention
The schematic view of facade structure of piece aluminium foil；
Fig. 4 b are the sag resistance test mould and heat exchanger wing after simulating Braze tests according to a first embodiment of the present invention
The schematic view of facade structure of piece aluminium foil；And
Fig. 5 is sag resistance test mould overlooking structure diagram according to a second embodiment of the present invention；
Specific implementation mode
Below in conjunction with drawings and examples, the specific implementation mode of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
It applies example to be for illustrative purposes only, rather than limiting the invention.
First embodiment
Fig. 3 is mould structure stereoscopic schematic diagram according to a first embodiment of the present invention, and Fig. 4 a are real according to the present invention first
Apply the schematic view of facade structure of sag resistance test mould and heat-exchanger fin aluminium foil before example simulation Braze tests.As schemed
Show, which includes a pedestal 1；A pair is spaced from each other the surface platform 2 being fixed on pedestal, the upper plane to platform
20 are located in the same horizontal plane and have a pair of opposed facing parallel seamed edge 21, and one is determined between the parallel seamed edge 21
Center line 22；This is divided into the pressing plate 3 on platform, for compressing a strip sample 4 from both ends respectively with a pair
On corresponding platform in plane 20.
In addition to this, above-mentioned mold further includes a pair of parallel guide roller 5 tangent with the horizontal plane from below, described to lead
It is symmetrically arranged to center line 22 of the roller between the parallel seamed edge 21.
Further, above-mentioned mold further includes one group of locating slot 6, in being arranged at intervals between the parallel seamed edge 21
The side of heart line 22, for being positioned to the strip sample 4 in the centerline direction.The locating slot 6 is described in
Pedestal upwardly extends, and forms the cylinder with lower end 61 and upper end 62, the upper surface 621 of the upper end 62 is higher by the upper of the platform
20 certain distance of plane.
Further, above-mentioned mold further includes one group of fixation gage 7, the group fix gage 7 and that group of locating slot 6 with
Center line 22 between the parallel seamed edge 21 is symmetrical arranged.The fixed gage 7 is upwardly extended from the pedestal 1, forms tool
There is the cylinder of lower part 71 and top 72.The upper surface 721 on the top 72 is higher by 20 certain distance of plane on the platform.This is fixed
Gage 7 indicates continuous length scale value from lower part 71 to top 72.
Further, above-mentioned mold further includes cylinder counterweight 8, its both sides is born against in the locating slot when pressurization is installed
6 and the fixed gage 7 on, center is fallen on the center line 22 between the parallel seamed edge 21.It can configure as needed
Multiple cylinder counterweights.
In addition, the mold of above-mentioned heat-exchanger fin aluminium foil sag resistance experiment further includes one group of bolt 9, for connecting
Platform 2 and pressing plate 3 are stated to clamp the strip sample 4.
Preferably, above-mentioned mold further includes one group of drawing pin 10, for fixing the strip sample and the pressing plate 3.
The heat-exchanger fin that sag resistance mold according to a first embodiment of the present invention carries out was tested with aluminium foil sag resistance
Cheng Wei：
(1) a kind of aluminium alloy compound foil of the double-clad of 0.08mm thickness is chosen, 120mm (roll to) × 15mm is prepared into
The sample 4 of (transverse direction), aluminium foil both sides, which are stretched, keeps sample smooth, using the pressing plate 3 and bolt 9 by heat exchanger wing to be detected
Piece is fixed on the both ends of aluminium foil sample 4 in the upper plane 20 of platform 2, and the guide roller 5 is used in combination to keep aluminium foil sample 4 to be checked opposite
Center line 22 between the parallel seamed edge 21 is symmetrical；
(2) weight for weighing cylinder counterweight 8 is m1, and is recorded, and the parallel seamed edge is corresponded in aluminium foil sample 4 to be checked
Cylinder counterweight 8 is placed at 22 position of center line between 21, and the cylinder counterweight 8 or so is made to bear against the fixed gage
7 and locating slot 6, suitable load is applied to aluminium foil sample 4 to be checked by this step；
(3) the fixed gage 7 is compareed, the position height H1 at the upper surface center of aluminium foil sample 4 to be checked at this time is read.
(4) the above-mentioned aluminium foil mold to be checked being fixed with after pressurization being placed in heating furnace and is heated, heating rate is 25 DEG C/
Min keeps the temperature 10min at 600 DEG C, carries out simulation Braze tests.
(5) after simulation soldering, above-mentioned mold is come out of the stove air-cooled, compares the fixed gage 7, read aluminium to be checked at this time
Position height H11 at the upper surface center of foil sample 4；
(6) it is tried according to the weight m1 of cylinder counterweight 8 added on aluminium foil sample 4 to be checked and the front and back aluminium foil to be checked of simulation soldering
Position height difference H1-H11 at 4 center of sample calculates sagging value (H1-H11)/m1 of specific loading.
The facade structures of sag resistance mold and heat-exchanger fin aluminium foil before and after embodiment simulation Braze tests are shown
It is intended to such as Fig. 4 a and Fig. 4 b.
The mold that the heat-exchanger fin of the embodiment of the present invention is tested with aluminium foil sag resistance, when experiment, can choose different materials
The aluminium foil to be checked of matter, repeats the above steps and is tested, and the aluminium foil of unlike material is weighed with the sagging value of same units load
Between sink-resistance performance size.Different load can also be applied to the aluminium foil of same material to determine the aluminium foil of this kind of material
Deformability under different loads.
Second embodiment
Fig. 5 is sag resistance test mould overlooking structure diagram according to a second embodiment of the present invention.This embodiment is different
It is in first embodiment：This embodiment can detect the sagging value of 4 groups of aluminium foils simultaneously, and first embodiment is only capable of one group of aluminium of detection
The sagging value of foil.Therefore, the sag resistance test mould of the embodiment also accordingly changes, and is allowed to rear direction before a mold and adds
It is long so that the mold can fix 4 groups of aluminium foils to be checked simultaneously.Correspondingly, pedestal 100, platform 200, guide roller 500 and pressing plate 300
All be lengthened out, fixing bolt 900, drawing pin 1000, cylinder counterweight 800, fixed gage 700 and locating slot 600 quantity all increase.
The structure of each section device in the embodiment is with function as in the first embodiment, details are not described herein.Using the experiment of the mold
Journey is similar to embodiment one, is only briefly described herein：
Selection thickness is 0.08mm, the aluminium alloy compound foil sample 400 of double-clad, be prepared into 120mm (roll to) ×
4, the sample of 15mm (transverse direction), is then placed on mold, is compressed sample with pressing plate 300, fixing bolt 900, and by drawing pin
1000 pass through the hole accomplished fluently in advance on pressing plate 300, and aluminium foil is fixed；
The weight of four groups of cylinder counterweights 800 is weighed, and is recorded, respectively mc1, mc2, mc3, mc4；
One group of cylinder counterweight 800 is respectively placed on four groups of aluminium foils respectively, record fixes 4 aluminium foils on gage 700 at this time
Elemental height, Hc1, Hc2, Hc3, Hc4；
The device is put into heating furnace and is heated, heating rate is 25 DEG C/min, and 10min is kept the temperature at 600 DEG C, is simulated
Braze tests.To after the time, come out of the stove air-cooled；
Measure the center height of 4 aluminium foils after simulation is brazed, respectively hc1, hc2, hc3, hc4；
The sagging value of specific loading of first aluminium foil is sg1=(Hc1-hc1)/m1, and so on, calculate other three groups of aluminium
The sagging value of specific loading of foil, respectively sg2, sg3, sg4；
Finally obtain the sagging value of the aluminium alloy compound foil mean unit load for the double-clad that such thickness is 0.08mm
Sg=(sg1+sg2+sg3+sg4)/4.
The aluminium alloy compound foil of four groups of double-clads of same size but unlike material can also be chosen, load is identical
Load carries out experiment as above, obtains the sagging value of the specific loading of four groups of unlike material aluminium foils.
The mold that the heat-exchanger fin of the embodiment of the present invention is tested with aluminium foil sag resistance can compare same material
Deformability of the sample to be checked under different loads can also compare deformation of the aluminium foil sample of different materials under same load
Ability, obtained result comparison are strong.
The counterweight and fix gage that above-mentioned first embodiment and second embodiment are carried by mold, can be with more acurrate convenience
Ground obtains the sag of chain of aluminium foil to be checked and the ability of anti-deforming.Moreover, the both ends of the sag resistance mold proposed are fixed
Device makes the effective length of all aluminium foils to be checked consistent, eliminate it is artificial when being fixed using one end caused by free end length not
Deng and the error that generates, result is more acurrate, reliable.
Finally it should be noted that：Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Go out other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out are still in the protection scope of this invention.
Claims (5)
1. a kind of mold tested with aluminium foil sag resistance for heat-exchanger fin, including a pedestal；A pair is spaced from each other
The surface platform being fixed on pedestal, the upper plane to platform are located in the same horizontal plane and are faced each other with a pair
Parallel seamed edge, a center line is determined between the parallel seamed edge；This is divided into the pressing plate on platform with a pair, and being used for will
One strip sample is pressed on corresponding platform from both ends in plane respectively；
Further include one group of locating slot, for being positioned to the strip sample in the centerline direction；The locating slot
It is upwardly extended from the pedestal, forms the cylinder with lower end and upper end, the upper surface of the upper end is higher by plane on the platform
Certain distance；
Further include one group of fixation gage, it is symmetrical with the center line between the parallel seamed edge with the locating slot which fixes gage
Setting；The fixed gage is upwardly extended from the pedestal, forms the cylinder with lower part and top, and the upper surface on the top is high
Go out plane certain distance on the platform of the pedestal；The fixation gage indicates continuous length scale value from lower part to top.
2. mold according to claim 1, which is characterized in that further include it is a pair of from below with tangent flat of the horizontal plane
Row guide roller, center line of the guide roller between the parallel seamed edge are symmetrically arranged in this between platform.
3. mold according to claim 1, which is characterized in that further include cylinder counterweight, its both sides is distinguished when pressurization is installed
It is resisted against on the locating slot and the fixed gage, center is fallen on the center line between the parallel seamed edge.
4. mold according to claim 1, which is characterized in that further include bolt, for connect the platform and pressing plate with
Clamp the strip sample.
5. mold according to claim 1, which is characterized in that further include drawing pin, for fix the strip sample and
The pressing plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510845367.8A CN105510145B (en) | 2015-11-26 | 2015-11-26 | The mold that heat-exchanger fin is tested with aluminium foil sag resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510845367.8A CN105510145B (en) | 2015-11-26 | 2015-11-26 | The mold that heat-exchanger fin is tested with aluminium foil sag resistance |
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| CN105510145A CN105510145A (en) | 2016-04-20 |
| CN105510145B true CN105510145B (en) | 2018-08-24 |
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| CN111443181A (en) * | 2020-05-12 | 2020-07-24 | 江苏鼎胜新能源材料股份有限公司 | Detection method and measurement device for measuring anti-sagging value of brazing foil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149084A (en) * | 2013-03-11 | 2013-06-12 | 江苏常铝铝业股份有限公司 | Bracket for sag resistance test of aluminum tape |
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- 2015-11-26 CN CN201510845367.8A patent/CN105510145B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149084A (en) * | 2013-03-11 | 2013-06-12 | 江苏常铝铝业股份有限公司 | Bracket for sag resistance test of aluminum tape |
Non-Patent Citations (3)
| Title |
|---|
| 单螺旋钨丝下垂的高温性能研究;旷落生，王嘉新;《稀有金属》;19841231;58-60 * |
| 用V型试验测量灯用钨丝的高温性能;杨红心;《中国照明电器》;20011231;20-21 * |
| 钼镧合金板材高温抗载荷弯曲性能研究;郭让民，等;《中国钼业》;20130630;47-49 * |
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