CN114289821A - Device and method for judging oxygen content of passing-through protective atmosphere - Google Patents
Device and method for judging oxygen content of passing-through protective atmosphere Download PDFInfo
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- CN114289821A CN114289821A CN202111677425.2A CN202111677425A CN114289821A CN 114289821 A CN114289821 A CN 114289821A CN 202111677425 A CN202111677425 A CN 202111677425A CN 114289821 A CN114289821 A CN 114289821A
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- oxygen content
- atmosphere
- plate
- judging
- protective atmosphere
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000001301 oxygen Substances 0.000 title claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001681 protective effect Effects 0.000 title claims abstract description 12
- 238000005219 brazing Methods 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 229910000679 solder Inorganic materials 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 2
- 229910052751 metal Inorganic materials 0.000 claims 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a device for judging oxygen content of passing-through protective atmosphere, which comprises a V-shaped plate with an opening at the top, wherein the V-shaped plate is integrally or fixedly arranged on a horizontal plate and comprises two inclined plates which are mutually fixed and symmetrically arranged, the symmetrical planes of the two inclined plates are vertically arranged, and the distance between the tops of the two inclined plates is not less than 0.15 mm. The device has simple structure, simple, convenient and intuitive judgment method, low cost and no need of stopping production, can reflect the oxygen content in the brazing furnace by observing the width of the welding liquid filled in the V-shaped plate, can obtain the corresponding relation data of the oxygen content and the width of the welding liquid filled through experiments, and can judge according to the data.
Description
Technical Field
The invention relates to the field of stainless steel brazing, in particular to a device and a method for judging oxygen content of a through type protective atmosphere.
Background
In the automobile industry, a stainless steel brazing process generally uses a mesh belt passing type protective atmosphere brazing furnace, and the brazing furnace is generally divided into three sections according to the oxygen content of parts: a preheating section (removing oxygen in the part by hydrogen combustion), a heating muffle section (heating to a process temperature under the protection of hydrogen atmosphere to melt a welding material and complete welding), and a cooling section (indirectly cooling the part by a water jacket under the protection of hydrogen atmosphere to make the part close to room temperature). As stainless steel welding has strict requirements on atmosphere, once the water content and the oxygen content in the atmosphere exceed the standards, the welding fails, part of parts can be scrapped, and the working condition service life of a product can be seriously shortened.
The current method for monitoring the furnace atmosphere mainly relies on an oxygen content meter and a dew point instrument to monitor the atmosphere parameters of an air inlet, can only detect the air inlet atmosphere of the brazing furnace in real time, and cannot detect when the brazing furnace is damaged and the oxygen content rises.
Meanwhile, the whole muffle section is integrally welded by adopting 310S materials, so that a gas detection hole cannot be formed, and the dew point meter and the oxygen content meter cannot measure the atmosphere in the muffle.
If the atmosphere in the reaction furnace cannot be monitored in real time, when the brazing furnace is abnormal, the brazing furnace can only be checked through the spot check of destructive tests, and once the brazing furnace is found to be bad, only products which are scrapped for a whole day or even a few days are scrapped, so that a great deal of economic loss is caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a device for judging the oxygen content of a through type protective atmosphere, which is used for solving the problem that an electronic instrument cannot monitor the atmosphere in a muffle of a brazing furnace, and the technical purpose is realized by the following technical scheme:
the utility model provides a device for judging through type protective atmosphere oxygen content, includes open-top's V template, the V template is integrative or fixed to be set up on the horizontal plate, the V template includes two swash plates that mutually fix and the symmetry set up, two the symmetry plane of swash plate is vertical to be set up, and two distance between the swash plate top is not less than 0.15 mm.
Further: the V-shaped plate is fixedly welded on the horizontal plate.
Further: the distance between the tops of the two inclined plates is not less than 0.2 mm.
Further: the distance between the tops of the two inclined plates is not less than 0.2 mm.
Further: and at least one inclined plate is provided with scale marks for reflecting the horizontal distance between the two inclined plates corresponding to different heights of the inclined plate from bottom to top.
The invention also aims to provide a method for judging the oxygen content of the passing-type protective atmosphere, which is used for solving the problem that an electronic instrument cannot monitor the atmosphere in a muffle of a brazing furnace, and the technical scheme is as follows:
and placing a device which is made of the same material as the product and is used for judging the oxygen content of the passing-type protective atmosphere into the brazing furnace, placing the solder on the horizontal plate, observing the filling width of the molten soldering liquid at the highest point between the V-shaped plates after the solder is fully molten, wherein the wider the filling width of the molten soldering liquid at the highest point, the lower the oxygen content in the brazing furnace is proved.
Preferably: the solder is copper.
Compared with the prior art, the invention has the beneficial effects that: the device has simple structure, simple, convenient and intuitive judgment method, low cost and no need of stopping production, can reflect the oxygen content in the brazing furnace by observing the width of the welding liquid filled in the V-shaped plate, can obtain the corresponding relation data of the oxygen content and the width of the welding liquid filled through experiments, and can judge according to the data.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention.
In the figure, 1, a sloping plate; 2. a horizontal plate; 3. and (5) marking scales.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows: firstly, the V-shaped plate is welded on the horizontal plate 2, the height of the V-shaped plate is 120mm, the V-shaped plate comprises two inclined plates 1 which are mutually fixed and symmetrically arranged, and the symmetrical plane is a vertical plane. The distance between the highest points of the two inclined plates 1 is 5mm, the bottoms of the two inclined plates are fixed together, and at least one inclined plate 1 is provided with scale marks 3 for reflecting the horizontal distance between the two inclined plates 1 corresponding to different heights of the inclined plate 1 from bottom to top.
The brazing principle is to utilize the siphon phenomenon of the capillary, and after the solder (copper in the embodiment) is melted, the siphon phenomenon is utilized to fully climb the whole welding surface along the welding seam of the product, so as to realize sealing welding. There are two conditions under which siphoning is achieved: 1. the welding seam is smaller: theoretically, the siphon phenomenon is more obvious when the welding seam is smaller, the width of the welding seam is not more than 0.2mm, the siphon phenomenon is more obvious, and particularly, the siphon phenomenon is obvious when the welding seam is not more than 0.15mm (the condition belongs to the prior art); 2. the surface of the weld is wettable by the molten solder, i.e. the surface of the weld is free of oxides. The oxide on the surface of the stainless steel product is mainly Cr2O3, which can be subjected to reduction reaction with hydrogen in a brazing furnace, but if the oxygen content in the hydrogen is high, such as the water content (dew point) is high, the reduction reaction is insufficient, the Cr2O3 cannot be completely reduced, siphonage cannot be generated or is not obvious enough, the climbing height of the copper soldering liquid in the V-shaped plate is not enough (the height corresponds to the filling width), the solder can only be accumulated on the surface of the welding seam, and the solder cannot be filled into the welding seam, so that the product is unqualified. Therefore, whether the oxygen content reaches the standard or not can be judged by measuring the filling width of the highest point of the welding liquid, the wider the width is, the lower the oxygen content is, the more sufficient the reduction reaction is when the filling width is not less than 0.15mm, the oxygen content reaches the standard, and products with higher product quality requirements can also be judged by using the filling width of the welding liquid not less than 0.2mm as a standard to judge whether the water content (dew point) in the furnace reaches the standard or not, namely whether the oxygen content reaches the standard or not.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A device for judging the oxygen content of a through type protective atmosphere is characterized in that: including open-top's V template, the V template is integrative or fixed to be set up on the horizontal plate, the V template includes two swash plates that mutually fix and the symmetry set up, two the symmetry plane of swash plate is vertical to be set up, and two distance between the swash plate top is not less than 0.15 mm.
2. The apparatus of claim 1, wherein the apparatus is configured to determine the oxygen content of a flow-through atmosphere, and wherein: the V-shaped plate is fixedly welded on the horizontal plate.
3. The apparatus of claim 1, wherein the apparatus is configured to determine the oxygen content of a flow-through atmosphere, and wherein: the distance between the tops of the two inclined plates is not less than 0.2 mm.
4. The apparatus of claim 2, wherein the apparatus is configured to determine the oxygen content of a flow-through atmosphere, and wherein: the distance between the tops of the two inclined plates is not less than 0.2 mm.
5. The apparatus according to claim 1, wherein the apparatus comprises: and at least one inclined plate is provided with scale marks for reflecting the horizontal distance between the two inclined plates corresponding to different heights of the inclined plate from bottom to top.
6. A method for judging the oxygen content of a passing-through protective atmosphere is characterized in that: the device for judging the oxygen content of the passing-through protective atmosphere, which is made of the same material as a brazing product and is made of any one of claims 1 to 5, is placed into a brazing furnace, the brazing filler metal is placed on the horizontal plate, after the brazing filler metal is fully melted, the highest point filling width of the molten welding liquid between the V-shaped plates is observed, and the wider the highest point filling width of the molten welding liquid is, the lower the oxygen content in the brazing furnace is proved.
7. The method of claim 6, wherein the method comprises: the solder is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677425.2A CN114289821A (en) | 2021-12-31 | 2021-12-31 | Device and method for judging oxygen content of passing-through protective atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677425.2A CN114289821A (en) | 2021-12-31 | 2021-12-31 | Device and method for judging oxygen content of passing-through protective atmosphere |
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| Publication Number | Publication Date |
|---|---|
| CN114289821A true CN114289821A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111677425.2A Pending CN114289821A (en) | 2021-12-31 | 2021-12-31 | Device and method for judging oxygen content of passing-through protective atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114289821A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2721110A1 (en) * | 1994-06-09 | 1995-12-15 | Air Liquide | Method and device for measuring wettability under a controlled atmosphere |
| DE102006023325A1 (en) * | 2006-05-11 | 2007-11-15 | Siemens Ag | Method for determining the wettability of a solder material |
| DE102009003023A1 (en) * | 2009-05-12 | 2010-11-18 | Robert Bosch Gmbh | Operating a reflow furnace to manufacture solder products for reflow soldering of electrical/electronic components onto a substrate using solder paste, comprises measuring residual oxygen content in interior of the furnace using a sensor |
| CN105277466A (en) * | 2015-12-01 | 2016-01-27 | 郑州机械研究所 | Testing method of joint filling property of brazing filler metal |
| CN107511607A (en) * | 2017-07-20 | 2017-12-26 | 湖北三江航天江北机械工程有限公司 | Cryogenic piping grafting soldering assessment method |
| CN109072352A (en) * | 2016-05-30 | 2018-12-21 | 株式会社Uacj | The method for welding of brazing sheet and its manufacturing method and constructed of aluminium body |
| CN212470109U (en) * | 2020-05-14 | 2021-02-05 | 青岛双丰热交换器有限公司 | Environment-friendly mesh belt brazing furnace |
-
2021
- 2021-12-31 CN CN202111677425.2A patent/CN114289821A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2721110A1 (en) * | 1994-06-09 | 1995-12-15 | Air Liquide | Method and device for measuring wettability under a controlled atmosphere |
| DE102006023325A1 (en) * | 2006-05-11 | 2007-11-15 | Siemens Ag | Method for determining the wettability of a solder material |
| DE102009003023A1 (en) * | 2009-05-12 | 2010-11-18 | Robert Bosch Gmbh | Operating a reflow furnace to manufacture solder products for reflow soldering of electrical/electronic components onto a substrate using solder paste, comprises measuring residual oxygen content in interior of the furnace using a sensor |
| CN105277466A (en) * | 2015-12-01 | 2016-01-27 | 郑州机械研究所 | Testing method of joint filling property of brazing filler metal |
| CN109072352A (en) * | 2016-05-30 | 2018-12-21 | 株式会社Uacj | The method for welding of brazing sheet and its manufacturing method and constructed of aluminium body |
| CN107511607A (en) * | 2017-07-20 | 2017-12-26 | 湖北三江航天江北机械工程有限公司 | Cryogenic piping grafting soldering assessment method |
| CN212470109U (en) * | 2020-05-14 | 2021-02-05 | 青岛双丰热交换器有限公司 | Environment-friendly mesh belt brazing furnace |
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Application publication date: 20220408 |