CN114453714A - Welding shielding gas detection method and inflation flow and inflation time determination method - Google Patents
Welding shielding gas detection method and inflation flow and inflation time determination method Download PDFInfo
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- CN114453714A CN114453714A CN202210195388.XA CN202210195388A CN114453714A CN 114453714 A CN114453714 A CN 114453714A CN 202210195388 A CN202210195388 A CN 202210195388A CN 114453714 A CN114453714 A CN 114453714A
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- inflation
- shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Abstract
The invention belongs to the technical field of argon arc welding, and discloses a welding shielding gas detection method and a method for determining inflation flow and inflation time, wherein the welding shielding gas detection method comprises the following steps: selecting a stainless steel argon arc welding wire with the same material as that of the stainless steel pipe to be welded, and heating a first end of the stainless steel argon arc welding wire to a red hot state; extending the first end into an inflation space of shielding gas through the space between the butt joint grooves of the two adjacent stainless steel pipes to be welded; after waiting for a first design time, cooling the first end to room temperature; and drawing out the first end, and judging the purity of the protective gas in the inflation space by observing the color of the first end. The welding shielding gas detection method, the inflation flow and the inflation time determination method provided by the invention have the advantages that the places for detecting the shielding gas are not limited, the protection effect can be more intuitively embodied, and the detection efficiency is high.
Description
Technical Field
The invention belongs to the technical field of argon arc welding, and particularly relates to a welding shielding gas detection method and an inflation flow and inflation time determination method.
Background
At present, the back protective gas of the stainless steel pipe butt argon arc welding is basically protected by pure argon (the purity is more than or equal to 99.99%) or high-purity argon (the purity is more than or equal to 99.999%), and the inflation effect is generally detected by an oxygen meter or judged by welding experience.
The oxygen measuring instrument judges the aeration effect of the back protection gas by detecting the oxygen content in the aeration space of the back protection gas, although the oxygen content in the aeration space of the back protection gas can be accurately detected, thereby obtaining the gas purity of the back protector. However, the oxygen measuring instrument is easy to damage, is mostly suitable for being used in fixed workplaces of workshops and is not suitable for being used in construction places outside the workshops, and the measurement accuracy can be ensured only by regular correction and standard inspection; moreover, the oxygen meter can only judge the gas purity in the back protective gas inflation space, the protection effect of the back protective gas inflated on the back weld joint of the stainless steel pipe argon arc welding cannot be directly reflected, and the measurement result of the oxygen meter can only be used as a reference basis.
Therefore, a welding shielding gas detection method, an inflation flow rate and an inflation time determination method are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a welding shielding gas detection method, an inflation flow and inflation time determination method, so that the detection place of the shielding gas is not limited, the protection effect can be more intuitively embodied, and the detection efficiency is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
a weld shielding gas detection method, comprising:
s1, selecting a stainless steel argon arc welding wire with the same material as the stainless steel pipe to be welded, and heating a first end of the stainless steel argon arc welding wire to a red hot state;
s2, extending the first end into an inflation space of protective gas through the space between the butt joint grooves of the two adjacent stainless steel pipes to be welded;
s3, after waiting for a first design time, cooling the first end to room temperature;
and S4, drawing out the first end, and judging the purity of the protective gas in the inflation space by observing the color of the first end.
Preferably, in step S1, the first end is heated in the vicinity of two opposing butt grooves.
Preferably, in step S1, the first end is heated by using an argon arc welding gun.
Preferably, the first design time is 3min to 5 min.
Preferably, the stainless steel tube to be welded and the stainless steel argon arc welding wire are made of austenite, the color grade of the discolored first end is 1-10 grades, the purity of the shielding gas is sequentially deteriorated from 1 grade to 10 grades, and the grade of 1-4 is qualified.
Preferably, the stainless steel tube to be welded and the stainless steel argon arc welding wire are made of martensite, the color of the first end after color change comprises silvery white, brown, blue, gray and black, wherein the larger the proportion of the silvery white is, the higher the purity of the shielding gas is.
A method for determining the inflation flow of shielding gas comprises the welding shielding gas detection method, and further comprises the following steps:
s5, selecting a plurality of different inflation flows by using a preset inflation time, and obtaining the changed color of the first end corresponding to each inflation flow through the steps S1-S4 under the condition of the plurality of different inflation flows;
and S6, comparing a plurality of colors, and selecting the inflation flow corresponding to the color closest to silvery white as the best inflation flow.
Preferably, in the step S5, five different inflation flow rates of 5L/min, 10L/min, 15L/min, 20L/min and 25L/min are selected.
A method for determining the inflation time of shielding gas comprises the method for determining the inflation flow of the shielding gas, and further comprises the following steps:
s7, selecting a plurality of different inflation times by using the best inflation flow determined in the step S6, and obtaining the changed color of the first end corresponding to each inflation time through the steps S1-S4 under the condition of the plurality of different inflation times;
and S8, comparing the colors, and selecting the inflation time corresponding to the color closest to silvery white as the best inflation time.
Preferably, in step S7, four different inflation times, 1min, 3min, 6min and 9min, are selected.
The invention has the beneficial effects that:
the welding shielding gas detection method provided by the invention comprises the steps of selecting a stainless steel argon arc welding wire which is made of the same material as a stainless steel pipe to be welded, and heating a first end of the stainless steel argon arc welding wire to a red hot state; extending the first end into an inflation space of shielding gas through the space between the butt joint grooves of two adjacent stainless steel pipes to be welded; after waiting for the first design time, cooling the first end to room temperature; and drawing out the first end, and judging the purity of the protective gas in the inflation space by observing the color of the first end. By utilizing the welding shielding gas detection method provided by the invention, a special detection instrument is not needed, so that the detection place of the shielding gas is not limited, the protection effect can be directly embodied through the color of the first end of the stainless steel argon arc welding wire, and the method is more visual and has high detection efficiency.
According to the method for determining the inflation flow of the shielding gas, provided by the invention, by utilizing the welding shielding gas detection method, the inflation flow of the shielding gas is changed, and the inflation flow corresponding to the color closest to silvery white is determined to be the best inflation flow according to the color of the first end obtained under the condition of a plurality of different inflation flows.
According to the method for determining the inflation time of the shielding gas, provided by the invention, by utilizing the welding shielding gas detection method, the inflation time of the shielding gas is changed, and the inflation time corresponding to the color closest to silvery white is determined to be the best inflation time according to the color of the first end obtained under the condition of a plurality of different inflation times.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a method for detecting a welding shielding gas when a stainless steel argon arc welding wire is heated according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a method for detecting a welding shielding gas when cooling a stainless steel argon arc welding wire according to an embodiment of the present invention.
In the figure:
1. a stainless steel tube to be welded; 2. stainless steel argon arc welding wires; 3. an air-filled space; 4. an argon arc welding gun.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
The embodiment provides a welding shielding gas detection method, which comprises the following steps:
s1, selecting a stainless steel argon arc welding wire 2 which is made of the same material as the stainless steel pipe 1 to be welded, wherein two ends of the stainless steel argon arc welding wire 2 are respectively a first end and a second end, and heating the first end of the stainless steel argon arc welding wire 2 to a red hot state as shown in figure 1;
in the embodiment, the second end of the stainless steel argon arc welding wire 2 is held, and the first end of the stainless steel argon arc welding wire 2 is moved to the vicinity of two opposite butt grooves; then, the first end of the stainless steel argon arc welding wire 2 is heated by the argon arc welding gun 4 until the first end is heated to a red hot state.
S2, as shown in figure 2, extending the first end into the gas-filled space 3 of the protective gas through the space between the butt joint grooves of the two adjacent stainless steel pipes 1 to be welded;
in this embodiment, after first end heating red hot state, will stretch into the gas filled space 3 of protective gas with first end fast in, avoid receiving the influence of outside gas at the in-process that removes and cause the inaccuracy of testing result.
S3, after waiting for the first design time, cooling the first end to room temperature;
in the embodiment, the first design time is 3min to 5min, that is, the first end of the stainless steel argon arc welding wire 2 is cooled in the gas filling space 3 for 3min to 5 min.
S4, the first end of the stainless steel argon arc welding wire 2 is drawn out, and the purity of the shielding gas in the air inflation space 3 is judged by observing the color of the first end.
According to the welding shielding gas detection method provided by the embodiment, the shielding gas has the effect of ensuring the welding effect and reducing the oxidation of the welding position, and for silvery white stainless steel, the higher the purity of the shielding gas is, the closer the color of the welding position is to silvery white, and the lower the purity is, the darker the color of the welding position is, so that the purity of the shielding gas in the gas filling space can be judged by observing the color of the first end of the stainless steel argon arc welding wire 2. The welding shielding gas detection method provided by the embodiment is utilized, a special detection instrument is not needed, so that the place for detecting the shielding gas is not limited, the protection effect can be directly embodied through the color of the first end of the stainless steel argon arc welding wire 2, and the method is more intuitive and has high detection efficiency.
Specifically, the stainless steel pipe 1 to be welded and the stainless steel argon arc welding wire 2 are made of austenite, the color grade of the discolored first end is 1-10 grades, the purity of the shielding gas is sequentially deteriorated from 1 grade to 10 grades, and the 1-4 grades are qualified. The stainless steel argon arc welding wire 2 is made of austenite, and the color change grade of the welding line in the austenitic stainless steel pipe is 1-10 grades according to AWS D18.2, so that the color grade of the color changed at the first end in the embodiment is 1-10 grades, each grade corresponds to one protective gas purity, the grades from 1 grade to 4 are qualified, and the protective gas purities corresponding to the four grades are 99.999%, 99.998%, 99.995% and 99.99% respectively.
Optionally, the materials of the stainless steel tube 1 to be welded and the stainless steel argon arc welding wire 2 may also be martensite, and the color of the first end after color change includes silvery white, brown, blue, gray and black, wherein the higher the proportion of silvery white is, the higher the purity of the shielding gas is, that is, the smaller the proportion of brown, blue, gray and black is, the better the protection effect of the shielding gas is proved. Of course, when the materials of the stainless steel pipe 1 to be welded and the stainless steel argon arc welding wire 2 are ferrite or duplex stainless steel, the purity of the shielding gas is also judged by the method similar to the above method.
Example two
The embodiment provides a method for determining the inflation flow of shielding gas, which comprises a welding shielding gas detection method provided in the first embodiment, wherein the same or corresponding parts as or to the first embodiment are provided with the same reference numerals as in the first embodiment.
Specifically, the method for determining the inflation flow of the shielding gas comprises the following steps:
s1, selecting a stainless steel argon arc welding wire 2 with the same material as that of the stainless steel pipe 1 to be welded, and heating a first end of the stainless steel argon arc welding wire 2 to a red hot state;
s2, extending the first end into the gas-filled space 3 of the shielding gas through the space between the butt grooves of the two adjacent stainless steel pipes 1 to be welded;
s3, after waiting for the first design time, cooling the first end to room temperature;
s4, drawing out the first end of the stainless steel argon arc welding wire 2, and judging the purity of the shielding gas in the gas filling space 3 by observing the color of the first end;
s5, selecting a plurality of different inflation flows by using a preset inflation time, and obtaining the changed color of the first end corresponding to each inflation flow through the steps S1-S4 under the condition of the plurality of different inflation flows;
in this embodiment, in step S5, five different inflation flows of 5L/min, 10L/min, 15L/min, 20L/min and 25L/min are selected.
And S6, comparing a plurality of colors, and selecting the inflation flow corresponding to the color closest to silvery white as the best inflation flow.
In the method for determining the inflation flow rate of the shielding gas provided by this embodiment, in steps S1-S4, the inflation flow rate of the shielding gas is changed, and the inflation flow rate corresponding to the color closest to silvery white is determined as the best inflation flow rate according to the color of the first end obtained under the condition of a plurality of different inflation flow rates. Therefore, the best gas filling flow rate can be determined by observing the color of the first end of the stainless steel argon arc welding wire 2. By utilizing the method for determining the inflation flow of the protective gas provided by the embodiment, the best inflation flow is determined more intuitively and efficiently.
EXAMPLE III
The embodiment provides a method for determining the inflation time of shielding gas, which comprises a method for determining the inflation flow of shielding gas provided by the second embodiment, wherein the same or corresponding parts as or to the second embodiment are provided with the same reference numerals as the second embodiment.
Specifically, the method for determining the inflation time of the shielding gas comprises the following steps:
s1, selecting a stainless steel argon arc welding wire 2 with the same material as that of the stainless steel pipe 1 to be welded, and heating a first end of the stainless steel argon arc welding wire 2 to a red hot state;
s2, extending the first end into the gas-filled space 3 of the shielding gas through the space between the butt grooves of the two adjacent stainless steel pipes 1 to be welded;
s3, after waiting for the first design time, cooling the first end to room temperature;
s4, drawing out the first end of the stainless steel argon arc welding wire 2, and judging the purity of the shielding gas in the gas filling space 3 by observing the color of the first end;
s5, selecting a plurality of different inflation flows by using a preset inflation time, and obtaining the color of the changed first end corresponding to each inflation flow through the steps S1-S4 under the condition of the plurality of different inflation flows;
s6, comparing a plurality of colors, and selecting the inflation flow corresponding to the color closest to silvery white as the best inflation flow;
s7, selecting a plurality of different inflation times by using the best inflation flow determined in the step S6, and obtaining the changed color of the first end corresponding to each inflation time through the steps S1-S4 under the condition of the plurality of different inflation times;
in this embodiment, in step S7, four different inflation times, 1min, 3min, 6min, and 9min, are selected.
And S8, comparing the colors, and selecting the inflation time corresponding to the color closest to silvery white as the best inflation time.
In the method for determining the inflation time of the shielding gas provided in this embodiment, the best inflation flow determined in step S6 is used, and in steps S1 to S4, the inflation time corresponding to the color closest to silver white is determined as the best inflation time according to the colors of the first end obtained under the condition of a plurality of different inflation times by changing the inflation time of the shielding gas. Therefore, the best gas filling time can be determined by observing the color of the first end of the stainless steel argon arc welding wire 2. By using the method for determining the inflation time of the shielding gas provided by the embodiment, the best inflation time determination is more intuitive and efficient.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A welding shielding gas detection method is characterized by comprising the following steps:
s1, selecting a stainless steel argon arc welding wire (2) which is made of the same material as the stainless steel pipe (1) to be welded, and heating the first end of the stainless steel argon arc welding wire (2) to a red hot state;
s2, extending the first end into an inflation space (3) of protective gas through the butt joint grooves of two adjacent stainless steel pipes (1) to be welded;
s3, after waiting for a first design time, cooling the first end to room temperature;
s4, drawing out the first end, and judging the purity of the protective gas in the inflation space (3) by observing the color of the first end.
2. The welding shielding gas detection method of claim 1, wherein the step S1 is performed by heating the first end near two opposing butt grooves.
3. The welding shielding gas detection method according to claim 1, wherein in step S1, the first end is heated using an argon arc welding gun (4).
4. The welding shielding gas detection method of claim 1, wherein the first design time is 3-5 min.
5. The welding shielding gas detection method according to claim 1, wherein the stainless steel tube (1) to be welded and the stainless steel argon arc welding wire (2) are made of austenite, the color grade of the discolored first end is 1-10 grades, the purity of the shielding gas is sequentially deteriorated from 1 grade to 10 grades, and the grade of 1-4 is qualified.
6. The welding shielding gas detection method according to claim 1, wherein the stainless steel tube (1) to be welded and the stainless steel argon arc welding wire (2) are made of martensite, and the color of the first end after color change comprises silvery white, brown, blue, gray and black, wherein the higher the proportion of silvery white is, the higher the purity of the shielding gas is.
7. A method of determining a shielding gas charge flow rate, comprising the welding shielding gas detection method of any of claims 1-6, further comprising:
s5, selecting a plurality of different inflation flows by using a preset inflation time, and obtaining the changed color of the first end corresponding to each inflation flow through the steps S1-S4 under the condition of the plurality of different inflation flows;
and S6, comparing a plurality of colors, and selecting the inflation flow corresponding to the color closest to silvery white as the best inflation flow.
8. The method for determining a shielding gas inflation flow rate of claim 7, wherein in the step S5, five different inflation flow rates of 5L/min, 10L/min, 15L/min, 20L/min and 25L/min are selected.
9. A method of determining a shielding gas inflation time, comprising the method of determining a shielding gas inflation flow rate of claim 7 or 8, further comprising:
s7, selecting a plurality of different inflation times by using the best inflation flow determined in the step S6, and obtaining the changed color of the first end corresponding to each inflation time through the steps S1-S4 under the condition of the plurality of different inflation times;
and S8, comparing the colors, and selecting the inflation time corresponding to the color closest to silvery white as the best inflation time.
10. The method for determining the inflation time of the shielding gas according to claim 9, wherein four different inflation times, i.e., 1min, 3min, 6min and 9min, are selected in step S7.
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| EP1400304A1 (en) * | 2002-09-20 | 2004-03-24 | Daido Tokushuko Kabushiki Kaisha | Welding wire and welding method using the wire |
| US20100011837A1 (en) * | 2007-02-22 | 2010-01-21 | Erich Eglseder | Arrangement and method for protective-gas measurement |
| CN110328435A (en) * | 2019-06-11 | 2019-10-15 | 中国人民解放军第五七一九工厂 | A kind of titanium alloy small space welding method |
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| CN111673238A (en) * | 2020-05-12 | 2020-09-18 | 中船澄西船舶修造有限公司 | Stainless steel pipe welding back protection inflation tool |
| CN112017183A (en) * | 2020-10-22 | 2020-12-01 | 南京知谱光电科技有限公司 | Welding wire component online detection method based on cooperation of arc image and arc spectrum information |
| CN112439970A (en) * | 2020-09-29 | 2021-03-05 | 上海江南长兴造船有限责任公司 | Argon shielded butt welding method for stainless steel pipes |
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2022
- 2022-03-01 CN CN202210195388.XA patent/CN114453714A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61296268A (en) * | 1985-06-25 | 1986-12-27 | Nippon Paionikusu Kk | Detection agent |
| EP1400304A1 (en) * | 2002-09-20 | 2004-03-24 | Daido Tokushuko Kabushiki Kaisha | Welding wire and welding method using the wire |
| US20100011837A1 (en) * | 2007-02-22 | 2010-01-21 | Erich Eglseder | Arrangement and method for protective-gas measurement |
| CN110328435A (en) * | 2019-06-11 | 2019-10-15 | 中国人民解放军第五七一九工厂 | A kind of titanium alloy small space welding method |
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| CN112439970A (en) * | 2020-09-29 | 2021-03-05 | 上海江南长兴造船有限责任公司 | Argon shielded butt welding method for stainless steel pipes |
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