CN109967909A - High-speed EMUs water tank main body weld seam backside gas protection technique - Google Patents
High-speed EMUs water tank main body weld seam backside gas protection technique Download PDFInfo
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- CN109967909A CN109967909A CN201910370919.2A CN201910370919A CN109967909A CN 109967909 A CN109967909 A CN 109967909A CN 201910370919 A CN201910370919 A CN 201910370919A CN 109967909 A CN109967909 A CN 109967909A
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- main body
- weld seam
- water tank
- body weld
- flexible metal
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Classifications
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of high-speed EMUs water tank main body weld seam backside gas protection techniques; including water tank; the water tank is welded into tetragonal body structure by the stainless steel plate in six faces; main body weld seam is formed in two long sides of water tank upper surface and four flaps of side surface, gas shield is carried out to every weld seam.Operation of the present invention is convenient, carries out backside gas protection in the main body weld seam of inner water tank, can effectively prevent the oxidation of main body weld seam back surfaces, improve main body weldquality, improve the sealing performance and antiseptic property of water tank；Main body weld seam sandblasting process can be reduced simultaneously, improve production efficiency.
Description
Technical field
The present invention relates to gas shield technology fields, especially a kind of high-speed EMUs water tank main body weld seam back gas
Body protection technique.
Background technique
It is 350 kilometers that standard type EMU, which runs speed per hour,.Water tank is a part of the water supply system of EMU vehicle；Because of vehicle
Upper toilet, kitchen, the water source of visitor's drinking water all derives from water tank on vehicle, therefore leakproofness and anti-corrosive properties after tank weld
It can require extremely stringent.
In the prior art, original main body weld seam backside gas guard method are as follows: using aluminum foil and adhesive tape along main body weld seam
Pasted, from one end to aluminum foil and adhesive tape inside be filled with argon gas, will be another after the argon gas inside aluminum foil and adhesive tape empties air
End is shut using aluminum foil and adhesive tape, and welder welds according to corresponding welding documents, easy to operate, but is existed
Following disadvantage:
(1) the cavity shape disunity that aluminum foil and adhesive tape is formed along main body weld seam, therefore will cause the argon gas of different location
Flow is different, will affect the main body weld seam back protecting effect of different location；
(2) because a large amount of heat can be generated in welding process, it will lead to aluminum foil and adhesive tape and be melted, postwelding need to use sandblasting
Etc. means the residue being melted on main body weld seam is removed, waste a large amount of human and material resources, influence production efficiency.
Summary of the invention
The applicant provides a kind of high-speed EMUs water tank main body weld seam back for the disadvantage in above-mentioned existing production technology
Gas shield technique in portion's improves production efficiency to improve the main body weldquality and aesthetics at main body weld seam back, protects
Inner water tank leakproofness in the long-term use and corrosion resistant performance are demonstrate,proved.
The technical solution adopted in the present invention is as follows:
A kind of high-speed EMUs water tank main body weld seam backside gas protection technique, including water tank, the water tank pass through six
The stainless steel plate in face is welded into tetragonal body structure, forms main body in two long sides of water tank upper surface and four flaps of side surface
Weld seam,
Specific protection technique is as follows:
Main body weld seam is wiped step 1: picking alcohol or acetone with non-woven fabrics, removes main body weld seam surrounding 25mm
In the range of greasy dirt and dust；
Step 2: preparing two flexible metal conduits, it is bent into " ┏ ┓ " type structure, respectively in the two sides of water tank along main body weld seam
It is placed, corresponds to the position of three main body weld seams after a flexible metal conduit bending simultaneously；
Step 3: the stomata of every armoured even tube wall distribution, is closed, separately every armoured one end end
One end end is passed through argon gas by connecting tube, when Continuous aeration, stable air-flow can be obtained by stomata and protects main body
Weld seam back surfaces non-oxidation phenomenon；
Step 4: flexible metal conduit is fixed on main body position while welding using Kapton adhesive tape；
Step 5: welding need to require for first two minutes according in third step, to the argon gas for being full of 99.99% in flexible metal conduit；
Step 6: welder welds according to corresponding welding documents；
Step 7: cooling to main body weld seam, cooling time is 3-10 minutes, by Kapton glue after the completion of welding
Band and flexible metal conduit are removed, and can be obtained that surface quality is preferable, the golden yellow main body weld seam of color.
As a further improvement of the above technical scheme:
In second step, flexible metal conduit uses diameter for the stainless steel material of 15mm.
In 6th step, the type of cooling be it is air-cooled, cooling time be 5 minutes.
The Kapton adhesive tape is no cord belt.
Beneficial effects of the present invention are as follows:
Operation of the present invention is convenient, carries out backside gas protection in the main body weld seam of inner water tank, can effectively prevent master
The oxidation of body weld seam back surfaces, improves main body weldquality, improves the sealing performance and antiseptic property of water tank；It can reduce simultaneously
Main body weld seam sandblasting process improves production efficiency.
The present invention is sealed snakeskin pipe port using Kapton adhesive tape, and Kapton adhesive tape can be resistant to height
Temperature, surface guarantees aesthetics without carrying out sandblasting removal residue glue without residue glue phenomenon when postwelding removes adhesive tape.
The armoured design of the present invention, the flexible metal conduit have good flexibility, high temperature resistant, wear-resistant, pull resistance, can hand
Work is curved at required shape, is convenient for being bonded with different location weld seam；Even tube wall is distributed venthole simultaneously, it is ensured that in weld seam
Surface forms uniform and stable protection air-flow, and then guarantees that weld seam will not be oxidized in the welding process.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein: 1, water tank；2, main body weld seam；3, flexible metal conduit.
Specific embodiment
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in Figure 1, the high-speed EMUs water tank main body weld seam backside gas protection technique of the present embodiment, including water tank 1,
Water tank 1 is welded into tetragonal body structure by the stainless steel plate in six faces, 1 upper surface of water tank two long sides and side surface four
Flap forms main body weld seam 2,
Specific protection technique is as follows:
Main body weld seam 2 is wiped step 1: picking alcohol or acetone with non-woven fabrics, removes 2 surrounding of main body weld seam
Greasy dirt and dust in the range of 25mm；
Step 2: preparing two flexible metal conduits 3, it is bent into " ┏ ┓ " type structure, is welded respectively in the two sides of water tank 1 along main body
Seam 2 is placed, and corresponds to the position of three main body weld seams 1 after 3 bending of flexible metal conduit simultaneously；
Step 3: the stomata of the even tube wall distribution of every flexible metal conduit 3, is closed in one end end of every flexible metal conduit 3,
Other end end is passed through argon gas by connecting tube, when Continuous aeration, stable air-flow can be obtained by stomata and protects master
2 back surfaces non-oxidation phenomenon of body weld seam；
Step 4: flexible metal conduit 3 is fixed on 2 position of main body weld seam using Kapton adhesive tape；
Step 5: welding need to require for first two minutes according in third step, to the argon gas for being full of 99.99% in flexible metal conduit 3；
Step 6: welder welds according to corresponding welding documents；
Step 7: cooling to main body weld seam 2, cooling time is 3-10 minutes, by Kapton glue after the completion of welding
Band and flexible metal conduit 3 are removed, and can be obtained that surface quality is preferable, the golden yellow main body weld seam 2 of color.
In second step, flexible metal conduit 3 uses diameter for the stainless steel material of 15mm.
In 6th step, the type of cooling be it is air-cooled, cooling time be 5 minutes.
Kapton adhesive tape is no cord belt.
Embodiment one:
A kind of technique that high-speed EMUs inner water tank is protected in main body weld seam backside gas, comprises the following steps that:
(1) water tank 1 is mainly welded by the stainless steel plate in six faces, after the completion of lower header is with weldering, need to use non-woven fabrics
It picks alcohol or acetone is wiped, remove the greasy dirt and dust in the range of 2 surrounding 25mm of main body weld seam；
(2) 304 flexible metal conduits 3 of Φ 15mm are placed along the main body weld seam 2 of lower header；
(3) use Kapton adhesive tape (no fiber) by tracheae sealing two ends；
(4) flexible metal conduit 3 is fixed on 2 position of main body weld seam using Kapton adhesive tape；
(5) welder welds according to corresponding welding documents；First 2 minutes of welding, need to be into above-mentioned flexible metal conduit 3
Full of 99.99% argon gas；
(6) cooling to main body weld seam 2 after the completion of welding, after five minutes, adhesive tape and flexible metal conduit 3 are removed, table can be obtained
Face quality is preferable, the golden yellow main body weld seam 2 of color.
The above-mentioned water tank for carrying out welding backside gas protection is tested, test process is as follows:
A, all outlet ports are clogging, one of outlet is blocked with pressure gauge.
B, water tank is filled into water with pressure pump and pressure gauge is made to reach defined pressure.
C, stop pressurization and pressure maintaining.Pressure 25kpa, pressure maintaining 1h.
D, whether strength spotlight exhaustive test water tank leaks.
E, clean water tank inside, exclusion catchment, foreign matter.
Embodiment two:
A kind of technique that high-speed EMUs inner water tank is protected in main body weld seam backside gas, comprises the following steps that:
(1) water tank 1 is mainly welded by the stainless steel plate in six faces, after the completion of lower header is with weldering, need to use non-woven fabrics
It picks alcohol or acetone is wiped, remove the greasy dirt and dust in the range of 2 surrounding 25mm of main body weld seam；
(2) 304 flexible metal conduits 3 of Φ 15mm are placed along the main body weld seam 2 of lower header；
(3) use Kapton adhesive tape (no fiber) by tracheae sealing two ends；
(4) flexible metal conduit 3 is fixed on 2 position of main body weld seam using Kapton adhesive tape；
(5) welder welds according to corresponding welding documents；First 2 minutes of welding, need to be into above-mentioned flexible metal conduit 3
Full of 99.99% argon gas；
(6) cooling to main body weld seam 2 after the completion of welding, after 3 minutes, adhesive tape and flexible metal conduit 3 are removed, table can be obtained
Face quality is preferable, the golden yellow main body weld seam 2 of color.
Embodiment three:
A kind of technique that high-speed EMUs inner water tank is protected in main body weld seam backside gas, comprises the following steps that:
(1) water tank 1 is mainly welded by the stainless steel plate in six faces, after the completion of lower header is with weldering, need to use non-woven fabrics
It picks alcohol or acetone is wiped, remove the greasy dirt and dust in the range of 2 surrounding 25mm of main body weld seam；
(2) 304 flexible metal conduits 3 of Φ 15mm are placed along the main body weld seam 2 of lower header；
(3) use Kapton adhesive tape (no fiber) by tracheae sealing two ends；
(4) flexible metal conduit 3 is fixed on 2 position of main body weld seam using Kapton adhesive tape；
(5) welder welds according to corresponding welding documents；First 2 minutes of welding, need to be into above-mentioned flexible metal conduit 3
Full of 99.99% argon gas；
(6) cooling to main body weld seam 2 after the completion of welding, after ten minutes, adhesive tape and flexible metal conduit 3 are removed, table can be obtained
Face quality is preferable, the golden yellow main body weld seam 2 of color.
Weld seam high treating effect of the present invention substantially increases 2 mass of main body weld seam and aesthetics at 2 back of main body weld seam,
Production efficiency is improved, ensure that inner water tank leakproofness in the long-term use and corrosion resistant performance.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right
It is required that within protection scope of the present invention, any type of modification can be made.
Claims (4)
1. a kind of high-speed EMUs water tank main body weld seam backside gas protection technique, including water tank (1), the water tank (1) pass through
The stainless steel plate in six faces is welded into tetragonal body structure, it is characterised in that: two long sides and side surface in water tank (1) upper surface
Four flaps formed main body weld seam (2),
Specific protection technique is as follows:
Main body weld seam (2) is wiped step 1: picking alcohol or acetone with non-woven fabrics, removes main body weld seam (2) surrounding
Greasy dirt and dust in the range of 25mm；
Step 2: preparing two flexible metal conduits (3), it is bent into " ┏ ┓ " type structure, is welded respectively in the two sides of water tank (1) along main body
Seam (2) is placed, and corresponds to the position of three main body weld seams (1) after flexible metal conduit (3) bending simultaneously；
Step 3: the stomata of the even tube wall distribution of every flexible metal conduit (3), is closed in one end end of every flexible metal conduit (3),
Other end end is passed through argon gas by connecting tube, when Continuous aeration, stable air-flow can be obtained by stomata and protects master
Body weld seam (2) back surfaces non-oxidation phenomenon；
Step 4: flexible metal conduit (3) is fixed on main body weld seam (2) position using Kapton adhesive tape；
Step 5: welding need to require for first two minutes according in third step, to the argon gas for being full of 99.99% in flexible metal conduit (3)；
Step 6: welder welds according to corresponding welding documents；
Step 7: cooling to main body weld seam (2), cooling time is 3-10 minutes, by Kapton adhesive tape after the completion of welding
It is removed with flexible metal conduit (3), can be obtained that surface quality is preferable, the golden yellow main body weld seam (2) of color.
2. high-speed EMUs water tank main body weld seam backside gas protection technique as described in claim 1, it is characterised in that: second
In step, flexible metal conduit (3) uses diameter for the stainless steel material of 15mm.
3. high-speed EMUs water tank main body weld seam backside gas protection technique as described in claim 1, it is characterised in that: the 6th
In step, the type of cooling be it is air-cooled, cooling time be 5 minutes.
4. high-speed EMUs water tank main body weld seam backside gas protection technique as described in claim 1, it is characterised in that: described
Kapton adhesive tape is no cord belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370919.2A CN109967909B (en) | 2019-05-06 | 2019-05-06 | Gas protection process for weld back of water tank main body of high-speed motor train unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370919.2A CN109967909B (en) | 2019-05-06 | 2019-05-06 | Gas protection process for weld back of water tank main body of high-speed motor train unit |
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| CN109967909A true CN109967909A (en) | 2019-07-05 |
| CN109967909B CN109967909B (en) | 2021-02-09 |
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| CN201910370919.2A Active CN109967909B (en) | 2019-05-06 | 2019-05-06 | Gas protection process for weld back of water tank main body of high-speed motor train unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112026800A (en) * | 2020-09-04 | 2020-12-04 | 安徽浦创轨道车辆装备有限责任公司 | Water tank of rail inspection vehicle |
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