CN109175635B - Local gas protection device and method for welding wall plate of metal sandwich structural member - Google Patents
Local gas protection device and method for welding wall plate of metal sandwich structural member Download PDFInfo
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- CN109175635B CN109175635B CN201811277159.2A CN201811277159A CN109175635B CN 109175635 B CN109175635 B CN 109175635B CN 201811277159 A CN201811277159 A CN 201811277159A CN 109175635 B CN109175635 B CN 109175635B
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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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- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a local gas protection device and a local gas protection method for welding a wall plate of a metal sandwich structural member. The device includes overcoat, board, silk group, cushion, intake pipe, gasbag, interior backing plate that looses, the overcoat is located board one side that looses and constitutes the cavity with the board that looses, interior backing plate is arranged in the cavity of overcoat, the silk group is arranged in between board and the silk group that looses in the cavity of overcoat, the intake pipe passes in the overcoat gets into the cavity, the board outside that looses is equipped with the cushion. And (3) placing the device in a flat state at a channel position corresponding to the crack, then inflating the air bag, expanding the outer sleeve to extrude the air diffusion plate, filling argon gas into the cavity of the outer sleeve, and then welding and repairing the crack by manual argon arc welding. The device can establish effective gas protective atmosphere at the position back to the back appears the oxidation phenomenon when preventing to weld to repair.
Description
Technical Field
The invention relates to the field of welding gas protection, in particular to a local gas protection device and a local gas protection method for welding a metal sandwich structural member wall plate.
Background
At present, when the local defects of the wall plate of the metal sandwich structural member are welded and repaired by adopting methods such as arc welding, laser welding and the like, substances such as veil and the like are adopted to block the back area of the welding and repairing position of the sandwich channel to form a local approximate closed space, then protective gas is input into the closed space by adopting a gas guide tube, and a gas protective atmosphere is formed in the local space of the back area, so that the back oxidation in the welding and repairing process is prevented from influencing the welding and repairing quality.
In the prior art, the operation process of establishing the back local closed space in the interlayer channel of the metal interlayer structural member by adopting a veil local blocking method is complicated, and when the channel space of the interlayer structural member is large, the effect of the local closed space is often poor, so that the gas protection effect of the back area is poor. In addition, when the welding repair position of the sandwich structural member wall plate is positioned at the deep position of the channel, the operation of the current veil local blocking method is difficult to implement.
Disclosure of Invention
The present invention is directed to solving the above problems and to providing a local gas shield apparatus and method for welding a panel of a sandwich metal structure. The device can be conveniently placed at the corresponding wallboard welding repair position in the interlayer channel when the wallboard welding repair of the interlayer structural member is carried out, and effective gas protection atmosphere can be established at the back of the position, so that the back is prevented from being oxidized when the welding repair is carried out. The device is suitable for welding and repairing the wall plate of the metal sandwich structural member with the narrow passage space and the wall plate of the metal sandwich structural member with the wide passage space.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a be used for metal intermediate layer structure wallboard welded local gas protection device, includes overcoat, gas board, silk group, cushion, intake pipe, gasbag, interior bolster, the overcoat is deformable bag form thing, and the overcoat is located gas board one side and constitutes the cavity with the gas board that looses, it has a plurality of gas holes that loose to distribute on the gas board, the cavity of overcoat is arranged in to interior bolster, the silk group is arranged in between gas board and the interior bolster in the cavity of overcoat, the intake pipe passes in the overcoat gets into the cavity, the part that the intake pipe is located the overcoat cavity is equipped with the gas distribution hole, the gasbag is arranged in between overcoat and the interior bolster, the inflation channel of gasbag passes the overcoat, the gas board outside that looses is equipped with the cushion, aerifys the cavity grow that makes the overcoat through inflation channel, makes cushion and overcoat compress tightly the wallboard on intermediate layer both sides respectively.
Preferably, the air diffuser plate has a rectangular shape.
Preferably, the number of the cushion blocks is 4, the cushion blocks are distributed at four corners of the air dispersing plate, and the height of each cushion block is 0.5 mm-5 mm.
Preferably, the aperture of the air diffusing holes on the air diffusing plate is 0.5-2.0 mm, and the distance between the air diffusing holes is 5-15 mm; the aperture of the air distributing holes on the air inlet pipe is 0.5 mm-2.0 mm, and the distance between the air distributing holes is 5 mm-15 mm.
Preferably, the clusters are made of stainless steel.
Preferably, the gas diffusion plate is made of copper alloy.
Preferably, the jacket is made of aluminum foil.
A local gas protection method for welding a metal sandwich structural member wall plate adopts the device for gas protection, and comprises the following steps:
the device in the flat state is placed at a channel position corresponding to the crack, the crack is located in the central area of the air diffusing plate, then the air bag is inflated, the outer sleeve expands to enable the air diffusing plate to be extruded and to be close to the back face of the wall plate in the area where the crack is located, the cushion block is attached to the back face of the wall plate, the distance between the air diffusing plate and the back face of the wall plate is the height of the cushion block, and after argon is filled into the cavity of the outer sleeve through the air inlet pipe, manual argon arc welding is adopted to weld and repair the crack.
Preferably, the flow rate of the argon gas is 10-20L/min.
Preferably, after argon is filled for 1-8 minutes, the cracks are welded and repaired by manual argon arc welding.
The traditional method adopts a veil local blocking method to establish a local gas protection space in the sandwich channel of the sandwich structural member, the operation process is complicated, and the protection effect is unstable. Compared with the prior art, the protection device is a complete independent protection device, can be quickly and conveniently placed on the back of the channel, and establishes stable and reliable local protection atmosphere in the area needing protection. The structure has the advantages that: first, the device can freely adjust the outflow amount of the shielding gas and the uniformity of the gas outflow. In the invention, the expansion volume is obtained by adjusting the air pressure in the air bag to produce adjustable extrusion degree on the stainless steel wire mass, so as to obtain different gap densities in the stainless steel wire mass. Through adjusting the internal clearance density of the stainless steel wire group, the outflow of the protective gas can be freely adjusted, and the uniformity of the outflow of the protective gas can be adjusted and controlled. Therefore, the gas outflow and outflow uniformity in the protection area can be improved by controlling the density of the internal clearance of the stainless steel wire cluster under the condition of relatively large flow of protective gas input, so that the problem of poor forming quality of the back of the welding seam at the repairing position caused by overlarge flow of the protective gas in various traditional protection methods is solved. Secondly, in this structure, adopt the mode of inflating and deflating of gasbag to realize different inflation volume, combine flexible sealed overcoat, can make this protection device adapt to the great intermediate layer passageway of various space size differences, both can be applied to the back protection of the wallboard welding repair in narrow passageway space, can be applied to the back protection of the wallboard welding repair in wide passageway space again.
Drawings
FIG. 1 is a schematic structural view of a local gas protection device for welding a wall plate of a metal sandwich structural member according to the present invention.
Detailed Description
In order that the invention may be more clearly understood, the following detailed description of the embodiments of the invention is given with reference to the accompanying drawings and examples.
As shown in figure 1, the invention relates to a local gas protection device for welding a metal sandwich structural member wall plate, which comprises an outer sleeve 1, a gas diffusion plate 5, a filament bundle 4, a cushion block 6, a gas inlet pipe 7, a gas bag 2 and an inner cushion plate 3, wherein the outer sleeve 1 is a deformable bag-shaped object, the outer sleeve 1 is positioned on one side of the gas diffusion plate 5 and forms a cavity with the gas diffusion plate 5, a plurality of gas diffusion holes are distributed on the gas diffusion plate 5, the inner cushion plate 3 is arranged in the cavity of the outer sleeve 1, the filament bundle 4 is arranged between the gas diffusion plate 5 and the inner cushion plate 3 in the cavity of the outer sleeve 1, the gas inlet pipe 7 penetrates through the outer sleeve 1 to enter the cavity, the part of the gas inlet pipe 7 positioned in the cavity of the outer sleeve 1 is provided with gas distribution holes, the gas bag 2 is arranged between the outer sleeve 1 and the inner cushion plate 3, an inflation channel 9 of the gas bag 2 penetrates through the outer sleeve 1, the cushion block 6 is, so that the cushion block 6 and the outer sleeve 1 respectively press the wall plates 8 at two sides of the interlayer.
Preferably, the diffuser plate 5 is rectangular or square in shape.
Preferably, the number of the cushion blocks 6 can be 4, the cushion blocks are distributed at four corners of the air dispersing plate 5, and the height of the cushion block 6 can be 0.5 mm-5 mm.
Preferably, the aperture of the air diffusing holes on the air diffusing plate 5 is 0.5 mm-2.0 mm, and the distance between the air diffusing holes is 5 mm-15 mm; the aperture of the air distributing holes on the air inlet pipe 7 is 0.5 mm-2.0 mm, and the distance between the air distributing holes is 5 mm-15 mm.
The clusters 4 can be made of various conventional materials in the prior art, as long as they have certain elasticity and elasticity, and preferably, the clusters 4 are made of stainless steel. The density of the internal clearance of the stainless steel wire cluster is changed by adjusting the expansion of the air bag, thereby achieving the purpose of adjusting the outflow and uniformity of the protective gas.
The gas diffusion plate 5 can be made of various conventional materials in the prior art, and preferably, the gas diffusion plate 5 is made of copper alloy.
The material of the outer sleeve 1 can be selected from various materials as long as the flexible material can realize deformation, and preferably, the material of the outer sleeve 1 is aluminum foil.
The method for local gas protection for welding the wall plate of the metal sandwich structural member is further explained by the following examples.
Example 1: the thickness of the wall plate of the titanium alloy sandwich structural member is 1.2mm, the space height of the sandwich channel is 10mm, a crack with the length of 10mm exists on the outer wall plate of the structure, and the crack is located in a straight section area of the sandwich structural member. And welding and repairing the cracks on the outer wall plate from the outer side by adopting argon arc welding. The gas protection device disclosed by the invention is deflated and pressed into a flat state, the flat gas protection device is placed at a channel position corresponding to a crack, the crack is positioned in the central area of the gas diffusion plate 5, then the gas bag 2 is inflated, the outer sleeve 1 is expanded to enable the gas diffusion plate 5 to be extruded and attached to the back of a wall plate of the area where the crack is positioned, argon is filled into the outer sleeve, the argon flow is always kept at 10L/min, after 1 minute of inflation, manual argon arc welding is adopted to weld and repair the crack, and the welding parameters of the argon arc welding are as follows: welding current is 70A, and welding gun protective gas is 15L/min. The back of the welding seam repaired by welding is metallic luster, and the oxidation phenomenon does not occur.
Example 2: stainless steel sandwich structure spare, wallboard thickness 1.0mm, the space height 20mm of intermediate layer passageway, there is a length 20 mm's crackle on the outer wallboard that the radian of sandwich structure spare is 690 mm. And welding and repairing the cracks on the outer wall plate from the outer side by adopting argon arc welding. The gas protection device disclosed by the invention is deflated and pressed into a flat state, placed at a channel position corresponding to a crack, and then inflated into the air bag 2, the outer sleeve 1 is expanded to enable the gas diffusion plate 5 to be extruded and attached to the back surface of the wall plate of the region where the crack is located, argon is inflated into the outer sleeve 1, the argon flow is always kept at 20L/min, after 5 minutes of inflation, the crack is welded and repaired by manual argon arc welding, and the welding parameters of the argon arc welding are as follows: welding current is 50A, and welding gun protective gas is 15L/min. The back of the welding seam repaired by welding is metallic luster, and the oxidation phenomenon does not occur.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A local gas protection device for welding of a metal sandwich structural member wall plate is characterized in that: including overcoat, gas board, silk group, cushion, intake pipe, gasbag, interior bolster, the overcoat is deformable bag form thing, and the overcoat is located gas board one side and constitutes the cavity with the gas board that looses, it has a plurality of gas holes that loose to distribute on the gas board, interior bolster is arranged in the cavity of overcoat, the silk group is arranged in between gas board and the interior bolster of loosing in the cavity of overcoat, the intake pipe passes in the overcoat gets into the cavity, the part that the intake pipe is located the overcoat cavity is equipped with the gas hole that divides, the gasbag is arranged in between overcoat and the interior bolster, the inflation channel of gasbag passes the overcoat, the gas board outside that looses is equipped with the cushion, aerifys the cavity grow that makes the overcoat through inflation channel, makes cushion and overcoat compress tightly the wallboard on both sides respectively.
2. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 1, wherein: the shape of the air dispersing plate is rectangular.
3. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 2, wherein: the number of the cushion blocks is 4, the cushion blocks are distributed at four corners of the air dispersing plate, and the height of the cushion blocks is 0.5 mm-5 mm.
4. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 1, wherein: the aperture of the air diffusing holes on the air diffusing plate is 0.5 mm-2.0 mm, and the distance between the air diffusing holes is 5 mm-15 mm; the aperture of the air distributing holes on the air inlet pipe is 0.5 mm-2.0 mm, and the distance between the air distributing holes is 5 mm-15 mm.
5. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 1, wherein: the wire group is made of stainless steel.
6. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 1, wherein: the material of the gas diffusion plate is copper alloy.
7. The local gas shield apparatus for use in welding of sandwich metal structural panels according to claim 1, wherein: the jacket is made of aluminum foil.
8. A local gas shield method for welding a metal sandwich structural member wall plate, which is performed by using the local gas shield apparatus for welding a metal sandwich structural member wall plate according to any one of claims 1 to 7, characterized by comprising the steps of:
and (3) placing the flat local gas protection device at a channel position corresponding to the crack to enable the crack to be positioned in the central area of the gas diffusion plate, then inflating the gas bag, expanding the outer sleeve to enable the gas diffusion plate to be extruded to be close to the back of the wall plate of the area where the crack is positioned, and after argon is inflated into the cavity of the outer sleeve through the gas inlet pipe, welding and repairing the crack by adopting manual argon arc welding.
9. The method of local gas shielding for welding of a sheet of metal sandwich structural member according to claim 8, wherein: the flow of the argon is 10-20L/min.
10. The method of local gas shielding for welding of a sheet of metal sandwich structural member according to claim 8, wherein: and (5) after argon is filled for 1-8 minutes, welding and repairing the cracks by adopting manual argon arc welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277159.2A CN109175635B (en) | 2018-10-30 | 2018-10-30 | Local gas protection device and method for welding wall plate of metal sandwich structural member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277159.2A CN109175635B (en) | 2018-10-30 | 2018-10-30 | Local gas protection device and method for welding wall plate of metal sandwich structural member |
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| CN109175635A CN109175635A (en) | 2019-01-11 |
| CN109175635B true CN109175635B (en) | 2020-11-10 |
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| CN109967909B (en) * | 2019-05-06 | 2021-02-09 | 无锡万里实业集团有限公司 | Gas protection process for weld back of water tank main body of high-speed motor train unit |
| CN110216413A (en) * | 2019-05-23 | 2019-09-10 | 航发优材(镇江)增材制造有限公司 | Nickel base superalloy turbine support seat argon arc welding restorative procedure |
| CN110449790B (en) * | 2019-08-22 | 2021-12-28 | 中船黄埔文冲船舶有限公司 | Pipeline inner wall welding protection device |
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| JP2001038465A (en) * | 1999-07-28 | 2001-02-13 | Toshiba Mach Co Ltd | Manufacture of abrasion resistant member |
| CN201443967U (en) * | 2009-07-28 | 2010-04-28 | 中冶北方工程技术有限公司 | Air-pocket profiling sealing device of sintering machine |
| CN202984947U (en) * | 2012-12-12 | 2013-06-12 | 南京麦驰钛业有限公司 | Protection gas lock device for girth welding of metallic conduit |
| CN105127552B (en) * | 2015-10-23 | 2017-09-05 | 南京中车浦镇城轨车辆有限责任公司 | A kind of pulse current auxiliary welding device and welding method |
| CN106141517A (en) * | 2016-08-29 | 2016-11-23 | 苏州泰盛新绿节能环保科技有限公司 | Argon device is rushed in a kind of pipeline welding |
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