CN111443181A - Detection method and measurement device for measuring anti-sagging value of brazing foil - Google Patents
Detection method and measurement device for measuring anti-sagging value of brazing foil Download PDFInfo
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- CN111443181A CN111443181A CN202010395251.XA CN202010395251A CN111443181A CN 111443181 A CN111443181 A CN 111443181A CN 202010395251 A CN202010395251 A CN 202010395251A CN 111443181 A CN111443181 A CN 111443181A
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- 239000011888 foil Substances 0.000 title claims abstract description 53
- 238000005219 brazing Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000007665 sagging Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 229910052782 aluminium Inorganic materials 0.000 description 18
- 238000012360 testing method Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/207—Welded or soldered joints; Solderability
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a detection method and a measurement device for measuring a sagging resistance value of a brazing foil, which comprises the following steps of ①, preparing a material to be detected into a foil to be tested, ②, clamping the foil to be tested in the measurement device, ③, placing the measurement device clamping the foil to be tested in a muffle furnace, ④, sequentially and rapidly heating, continuously preserving heat and cooling the foil to be tested, ⑤, taking the foil to be tested out together with the measurement device, measuring and calculating the sagging resistance value.
Description
Technical Field
The invention relates to a detection method and a measurement device for measuring a sagging resistance value of a brazing foil.
Background
The brazing aluminum foil is one of key materials for manufacturing heat exchangers in the fields of automobiles, engineering machinery, air cooling of power stations, micro-channels, PTC, air separation and the like, and is formed by rolling and compounding a coating layer alloy single-side or double-side coating matrix alloy or rolling a direct single-layer organism alloy. In the heat exchanger production industry in the fields of automobiles and the like, brazing is widely used as a method for reliably connecting aluminum and aluminum alloy.
The sag resistance of the brazing aluminum foil is the most critical quality index, and no test method for evaluating the sag resistance of the brazing aluminum foil exists at present. The sag resistance of brazed aluminum foils has also only been indirectly characterized in the heat exchanger manufacturing industry by other means, such as: the defect of 'shrinkage after welding of a heat exchanger' is traced to 'poor sag resistance of the brazing aluminum foil', but the method has large investment and large loss, and the sag resistance of the brazing aluminum foil cannot be judged in advance.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a detection method and a measurement device for measuring the sagging resistance value of a brazing foil.
A test method for measuring the sag resistance of a brazing foil, comprising the steps of:
①, taking the length of the material to be detected to be 80-120mm along the rolling direction, and taking the length to be 20-25mm along the transverse direction, and preparing the foil to be tested;
②, clamping the foil to be tested in the measuring device, wherein after clamping, the length of the front end of the foil to be tested exposed outwards is about 50 mm;
③, placing the measuring device clamped with the foil to be tested in a muffle furnace with nitrogen protection, closing the furnace door, introducing nitrogen for purging, and ensuring that the internal oxygen content is lower than 150 PPM;
④, sequentially carrying out rapid heating, continuous heat preservation and cooling treatment on the foil to be tested;
⑤, the foil to be tested is taken out together with the measuring device, and the end high end of the protruding part of the tested foil is measured, so as to calculate the droop value.
Preferably, in step ④, the specific parameters of the rapid heating stage are that the temperature is increased from room temperature 20 ℃ to 600 ℃, the heating rate is 30K/min, and the duration is about 19 min.
Preferably, in step ④, the specific parameter of the continuous heat-preserving stage is that the temperature is kept constant at 600 ℃ for about 10 min.
Preferably, in step ④, the specific parameters of the cooling stage are that the temperature is reduced from 600 ℃ to 200 ℃, the cooling rate is 8K/min, and the duration is about 50 min.
A measuring device for measuring the sag resistance value of the brazing foil used in the detection method comprises a main frame, the side wall of the main frame is connected with a front frame and a rear frame, the upper surfaces of the front frame and the rear frame are equal in height, a pressure plate is arranged above the front frame and the rear frame, the pressing plate comprises a front pressing plate and a rear pressing plate, the front pressing plate is matched with the front frame, the rear pressing plate is matched with the rear frame, the front pressing plate and the rear pressing plate are connected through a plurality of connecting plates, the upper surface of the front frame is connected with an upper plate through a sliding rod, the front pressing plate is provided with a sliding hole matched with the sliding rod, the rear pressing plate is provided with a bolt through hole, the upper plate is connected with a pressing mechanism, the pressing mechanism comprises a plurality of pressing heads, the bottoms of the pressing heads are abutted against the upper surface of the front pressing plate, the middle parts of the pressing heads penetrate through the upper plate and are connected with the connecting plate, the upper surface of connecting plate is equipped with the handle, and the head of pressure head passes through the spring and links to each other with the lower surface of upper plate.
Preferably, the height of the main frame is 100-120 mm.
Preferably, the lower surfaces of the headers are higher than the lower surfaces of the front and rear press plates.
Has the advantages that:
the invention directly measures the anti-sagging capability of the brazing foil by a special measuring device and a direct heating detection mode, and has accurate measuring result and high measuring speed.
Drawings
FIG. 1 is a schematic view of the general structure of a measuring device for measuring the sagging resistance of a brazing foil;
FIG. 2 is a front view of a measuring device for measuring the sag resistance of a brazing foil;
FIG. 3 is an exploded view of a measuring device for measuring the sag resistance of a brazing foil;
FIG. 4 is a table of temperature control parameters at the time of detection;
FIG. 5 is a table of the test results in the first embodiment;
FIG. 6 is a table showing the results of the detection in the second embodiment;
FIG. 7 is a table showing the results of the detection in the third embodiment;
1. the main frame 2, the foil to be tested 3, the front frame 4, the pressure plate 5, the upper plate 6, the spring 7, the connecting plate 8, the handle 9, the sliding rod 10, the fixing bolt 11 and the rear frame.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1-3, a measuring device for measuring the sagging resistance value of a brazing foil comprises a main frame 1 with a height of about 105mm, a front frame 3 and a rear frame 11 are connected to the side wall of the main frame 1, the upper surfaces of the front frame 3 and the rear frame 11 are equal in height, a pressure plate 4 is arranged above the front frame 3 and the rear frame 11, the pressure plate 4 comprises a front pressure plate and a rear pressure plate, the front pressure plate is matched with the front frame 3, the rear pressure plate is matched with the rear frame 11, the front pressure plate and the rear pressure plate are connected through a plurality of connecting plates, the upper surface of the front frame 3 is connected with an upper plate 5 through a sliding rod 9, a sliding hole matched with the sliding rod 9 is arranged on the front pressure plate, a bolt through hole is arranged on the rear pressure plate, a pressing mechanism is connected on the upper plate 5, the pressing mechanism comprises a plurality of pressing heads, the bottoms of the pressing heads are abutted against the upper surface of the front pressure plate, the middle parts, the upper surface of connecting plate 7 is equipped with handle 8, and the head of pressure head passes through spring 6 and links to each other with the lower surface of upper plate 5.
The specific detection method comprises the following steps:
(1) preparing a sample: taking a flat brazing aluminum foil sample piece, wherein the alloy state is as follows: 4343/3003MOD/4343-H16, thickness: 0.09 mm.
The length of the brazing aluminum foil sample piece in the Rolling Direction (RD) and the Transverse Direction (TD) is 100mm, the length of the brazing aluminum foil sample piece in the transverse direction is 22mm, and the test sample piece specification is 100x22x thickness mm. The test piece was clamped according to the requirements of FIG. 1.
(2) Sample wafer detection:
and (3) placing the detection device and the sample wafer prepared in the step (1) in a muffle furnace with nitrogen protection, closing a furnace door, introducing nitrogen for purging to ensure that the oxygen content in the furnace is less than or equal to 150PPM, and then heating according to the detection process shown in the figure 4.
(3) And (4) evaluating the results:
for the results prepared in step (2), after the brazing simulation was completed and the inspection apparatus was taken out of the muffle furnace, the height of each strip sample was measured at the end of the projecting portion. The sag value was obtained by subtracting the peel height determined after the braze simulation (FH) from the Initial Height (IH).
Sag is the initial height-simulated height of brazing.
The sag performance of the test piece was evaluated based on the sag values of the approved series production materials, and the measurement data and the evaluation results are shown in fig. 5.
Example two:
the method for detecting the sagging resistance of the brazing aluminum foil comprises the following steps:
(1) preparing a sample: taking a flat brazing aluminum foil sample piece, wherein the alloy state is as follows: 4343/3003MOD-H24, thickness: 0.3 mm.
The length of the brazing aluminum foil sample piece in the Rolling Direction (RD) and the Transverse Direction (TD) is 100mm, the length of the brazing aluminum foil sample piece in the transverse direction is 22mm, and the test sample piece specification is 100x22x thickness mm. Clamping the experimental sample according to the requirements of figure 1
(2) Sample wafer detection:
and (3) placing the detection device and the sample wafer prepared in the step (1) in a muffle furnace with nitrogen protection, closing a furnace door, introducing nitrogen for purging to ensure that the oxygen content in the furnace is less than or equal to 150PPM, and then heating according to the detection process shown in the figure 4.
(3) And (4) evaluating the results:
for the results prepared in step (2), after the brazing simulation was completed and the inspection apparatus was taken out of the muffle furnace, the height of each strip sample was measured at the end of the projecting portion. The sag value was obtained by subtracting the peel height determined after the braze simulation (FH) from the Initial Height (IH).
Sag is the initial height-simulated height of brazing.
The sag performance of the test specimens was evaluated based on the sag values of the approved series production materials, and the measurement data and evaluation results are shown in fig. 6.
Example three:
the method for detecting the sagging resistance of the brazing aluminum foil comprises the following steps:
(1) preparing a sample: taking a flat brazing aluminum foil sample piece, wherein the alloy state is as follows: 3003MOD-H16, thickness: 0.05mm
The length of the brazing aluminum foil sample piece in the Rolling Direction (RD) and the Transverse Direction (TD) is 100mm, the length of the brazing aluminum foil sample piece in the transverse direction is 22mm, and the test sample piece specification is 100x22x thickness mm. Clamping the experimental sample according to the requirements of figure 1
(2) Sample wafer detection:
and (3) placing the detection device and the sample wafer prepared in the step (1) in a muffle furnace with nitrogen protection, closing a furnace door, introducing nitrogen for purging to ensure that the oxygen content in the furnace is less than or equal to 150PPM, and then heating according to the detection process shown in the figure 4.
(3) And (4) evaluating the results:
for the results prepared in step (2), after the brazing simulation was completed and the inspection apparatus was taken out of the muffle furnace, the height of each strip sample was measured at the end of the projecting portion. The sag value was obtained by subtracting the peel height determined after the braze simulation (FH) from the Initial Height (IH).
Sag is the initial height-simulated height of brazing.
The sag performance of the test piece was evaluated based on the sag values of the approved series production materials, and the measurement data and the evaluation results are shown in fig. 7.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A detection method for measuring the sag resistance value of a brazing foil is characterized by comprising the following steps:
①, taking the length of the material to be detected to be 80-120mm along the rolling direction, and taking the length to be 20-25mm along the transverse direction, and preparing the foil to be tested;
②, clamping the foil to be tested in the measuring device, wherein after clamping, the length of the front end of the foil to be tested exposed outwards is about 50 mm;
③, placing the measuring device clamped with the foil to be tested in a muffle furnace with nitrogen protection, closing the furnace door, introducing nitrogen for purging, and ensuring that the internal oxygen content is lower than 150 PPM;
④, sequentially carrying out rapid heating, continuous heat preservation and cooling treatment on the foil to be tested;
⑤, the foil to be tested is taken out together with the measuring device, and the end high end of the protruding part of the tested foil is measured, so as to calculate the droop value.
2. The method as claimed in claim 1, wherein the rapid heating stage in step ④ is performed at a heating rate of 30K/min and a heating time of 19min or so from room temperature of 20 ℃ to 600 ℃.
3. The method as claimed in claim 1, wherein the specific parameters of the continuous maintaining period in step ④ are that the temperature is kept constant at 600 degrees centigrade for about 10 min.
4. The method as claimed in claim 1, wherein in step ④, the specific parameters of the cooling process are that the temperature is decreased from 600 ℃ to 200 ℃, the cooling rate is 8K/min, and the time is about 50 min.
5. A measuring device for measuring the sagging resistance value of a brazing foil as used in any one of claims 1 to 4, comprising a main frame, wherein the side wall of the main frame is connected with a front frame and a rear frame, the front frame and the rear frame have the same height, a pressure plate is arranged above the front frame and the rear frame, the pressure plate comprises a front pressure plate and a rear pressure plate, the front pressure plate is matched with the front frame, the rear pressure plate is matched with the rear frame, the front pressure plate and the rear pressure plate are connected through a plurality of connecting plates, the upper surface of the front frame is connected with an upper plate through a sliding rod, the front pressure plate is provided with a sliding hole matched with the sliding rod, the rear pressure plate is provided with a bolt through hole, the upper plate is connected with a pressing mechanism, the pressing mechanism comprises a plurality of pressing heads, the bottoms of the pressing heads are abutted against the upper surface of the front pressure plate, the middle parts of the pressing heads pass through the upper plate and are connected with the connecting, the upper surface of connecting plate is equipped with the handle, and the head of pressure head passes through the spring and links to each other with the lower surface of upper plate.
6. The measuring device for the sag resistance value measurement of the brazing foil as recited in claim 5, wherein the main frame has a height of 100-120 mm.
7. The measuring device for measuring the sagging resistance value of the brazing foil according to claim 5, wherein the lower surface of the header plate is higher than the lower surfaces of the front and rear pressing plates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010395251.XA CN111443181A (en) | 2020-05-12 | 2020-05-12 | Detection method and measurement device for measuring anti-sagging value of brazing foil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010395251.XA CN111443181A (en) | 2020-05-12 | 2020-05-12 | Detection method and measurement device for measuring anti-sagging value of brazing foil |
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| CN111443181A true CN111443181A (en) | 2020-07-24 |
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Citations (4)
| 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 |
| CN105510145A (en) * | 2015-11-26 | 2016-04-20 | 银邦金属复合材料股份有限公司 | Sag resistance testing die of aluminium foils for heat exchanger fins |
| JP2019125739A (en) * | 2018-01-18 | 2019-07-25 | 三菱電機株式会社 | Soldering jig and soldering device |
| CN212364278U (en) * | 2020-05-12 | 2021-01-15 | 江苏鼎胜新能源材料股份有限公司 | Measuring device for measuring anti-sagging value of brazing foil |
-
2020
- 2020-05-12 CN CN202010395251.XA patent/CN111443181A/en active Pending
Patent Citations (4)
| 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 |
| CN105510145A (en) * | 2015-11-26 | 2016-04-20 | 银邦金属复合材料股份有限公司 | Sag resistance testing die of aluminium foils for heat exchanger fins |
| JP2019125739A (en) * | 2018-01-18 | 2019-07-25 | 三菱電機株式会社 | Soldering jig and soldering device |
| CN212364278U (en) * | 2020-05-12 | 2021-01-15 | 江苏鼎胜新能源材料股份有限公司 | Measuring device for measuring anti-sagging value of brazing foil |
Non-Patent Citations (1)
| Title |
|---|
| 靳丹萍等: "热处理对钎焊铝箔翅片料抗下垂性能的影响", 有色金属材料与工程, no. 5, 15 October 2018 (2018-10-15), pages 19 - 23 * |
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