CN116393790B - Welding method for sealing high-vacuum cavity - Google Patents
Welding method for sealing high-vacuum cavity Download PDFInfo
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- CN116393790B CN116393790B CN202310670672.2A CN202310670672A CN116393790B CN 116393790 B CN116393790 B CN 116393790B CN 202310670672 A CN202310670672 A CN 202310670672A CN 116393790 B CN116393790 B CN 116393790B
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- 238000003466 welding Methods 0.000 title claims abstract description 207
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 120
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052786 argon Inorganic materials 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 95
- 238000004140 cleaning Methods 0.000 claims description 52
- 238000005498 polishing Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/235—Preliminary treatment
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the technical field of welding, and particularly relates to a welding method for sealing a high-vacuum cavity, which comprises the following steps: controlling a welding head to be close to a welding point, performing spot welding through the welding head, at the moment, performing backing welding by using TIG argon arc welding as protective gas, ensuring that the effective thickness of the backing is more than two millimeters, and performing surface flaw detection by using PT flaw detection equipment after the spot welding is finished; post-use flux-cored wire CO 2 The cover surface is filled by gas shielded welding, so that a cover surface welding seam is formed, the welding strength and the welding seam quality are both considered, the welding efficiency is greatly improved, and meanwhile, the welding deformation is reduced due to the reduction of welding heat input.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a welding method for sealing a high-vacuum cavity.
Background
An efficient welding apparatus generally refers to a device capable of performing large-scale or complex welding work at high speed and high accuracy. It can be used for welding various materials, including metal, plastic, etc. The high-efficiency welding device can be widely applied to the manufacturing industries and related fields of aviation, automobiles, electronics, communication and the like. Besides improving fusion efficiency and product quality, the welding device can greatly reduce labor cost and accelerate production flow, and can be used for welding two steel plates in the corner welding process of parts such as steel plates. The conventional high-efficiency welding device is preferred to clean and level the welding workpiece when welding, the welding joint can be used for welding operation after the operation is finished, the surface of the welding workpiece is required to be cleaned and the surface of the welding seam is required to be polished after the welding is finished, that is, in the welding process, the welding joint is repeatedly switched with the cleaning device and the leveling device, and in the prior art, the welding joint is required to be detached and the cleaning device and the leveling device are arranged or the workpiece is required to be cleaned and polished after the welding is finished each time, so that the welding efficiency is low as a whole, and improvement is needed. In the welding process of workpieces, polishing and surface cleaning are needed to be carried out on the surfaces of the welded workpieces, a polishing device and a cleaning device are generally used for assisting polishing operation in the prior art, in the welding process, the welding surfaces are needed to be cleaned or polished after a period of welding is not carried out continuously, so that repeated switching is needed in the welding process, namely, welding, polishing and cleaning are repeatedly carried out, but no targeted optimization is carried out on the process in the prior art, automatic polishing and cleaning after the welding is finished cannot be realized, and external power is needed to be used, so that the welding quality is lower.
In the welding process for steel plates, the prior art generally uses pure argon arc welding or solid welding wire CO 2 The gas shielded welding performs the protection of welding, but the welding efficiency of the pure argon arc welding is low, the welding deformation is large, and the solid welding wire CO 2 The gas shielded welding has alloy element burning loss, serious splashing and CO air holes, and the quality and the tightness of the welding line are difficult to ensure.
Disclosure of Invention
The invention aims to provide a welding method for sealing a high vacuum cavity, which is used for solving the problems in the background technology.
In order to achieve the above object, the present invention provides the following technical solutions:
a welding method for sealing a high vacuum cavity, which is applied to a welding device, the welding method comprising the following steps:
s1: firstly, preparing a steel plate to be welded, blanking, keeping the flatness of the surface of the steel plate, at the moment, cleaning the surface of a welding joint after the degree of freedom of a welding device is ensured by connecting a fixed lug plate and a free mechanical arm, ensuring that the surface of the welding joint is free from greasy dirt and rust, and completing the preparation before welding by controlling the free mechanical arm to move the welding device to a welding position;
s2: at the moment, the welding head is controlled to be close to the welding point, spot welding is carried out through the welding head, at the moment, TIG argon arc welding is used as shielding gas for backing welding, the effective thickness of the backing is ensured to be more than two millimeters, and PT flaw detection equipment is needed to be used for carrying out surface flaw detection after the spot welding is finished.
Firstly, argon arc welding is used for bottoming, two steel plates are welded, an argon arc welding seam is formed, and the tightness of the vacuum welding seam is ensured; post-use flux-cored wire CO 2 The cover surface is filled by gas shielded welding, so that a cover surface welding seam is formed, the welding strength and the welding seam quality are both considered, the welding efficiency is greatly improved, and meanwhile, the welding deformation is reduced due to the reduction of welding heat input.
Preferably, the method further comprises the following steps:
s3: the method comprises the steps that external high-pressure gas is input into the second gas storage tube through the gas inlet valve, the second piston plate and the second piston rod descend along with the second gas storage tube until the second piston plate moves to the bottom ends of the first gas outlet and the second gas outlet, the second movable block descends along with the second gas storage tube relative to the frame and drives the leveling cleaning assembly to descend, part of the gas in the second gas storage tube can enter the first gas storage tube through the first gas outlet and the gas inlet tube, the first piston plate is subjected to upward pressure and drives the first piston rod and the first movable block to move upwards, the welding head moves upwards along with the welding head, and automatic descending of the leveling cleaning assembly and automatic upward moving of the welding head are completed;
s4: part of gas in the second gas storage pipe can be input into the power tank through the second gas outlet and the corrugated pipe, at the moment, the impeller rotates along with the second gas storage pipe and drives the driving gear to rotate, the driven gear rotates along with the second gas storage pipe, the extension shaft at the bottom end and the polishing wheel rotate along with the driven gear, the polishing surface can be polished at the moment when the leveling cleaning assembly reaches the working position, and meanwhile, the gas in the power tank can be discharged through the three-way valve and the gas pipe and finally acts on the surface of a workpiece to finish automatic cleaning;
s5: the gas input by the air inlet valve can be cut off after finishing grinding and cleaning, at the moment, the second reset spring automatically resets and drives the leveling cleaning component to automatically move upwards, and the exhaust valve is opened to release the gas in the first gas storage pipe, the first reset spring automatically resets and drives the welding head to automatically descend to finish welding after switching, at the moment, the flux-cored wire CO gas shielded welding is used for filling the cover surface, welding is finished, and then the PT flaw detection and cleaning and grinding work is repeated again to finish the welding flow.
Preferably, this welding set includes the frame, the draw-in groove has all been seted up to the left and right sides of frame inner chamber, the inside movable joint that is located left side draw-in groove has first movable block, the inside movable joint that is located right side draw-in groove has the second movable block, the equal fixedly connected with fixture block of the one end that first movable block and second movable block are close to relatively, movable joint between first movable block and the draw-in groove is passed through to first movable block and second movable block, the top of first movable block is equipped with first gas-storage tube, the top of second movable block is equipped with the second gas-storage tube, first movable block and second movable block are the diagonal setting, the clean subassembly of flattening is installed to the bottom of second movable block, the left side fixed intercommunication that first gas-storage tube lateral surface is close to the bottom has the discharge valve, the right side fixed intercommunication that first gas-storage tube lateral surface is close to the bottom has the intake pipe, the left and right sides that the second gas-storage tube is close to the bottom respectively fixed intercommunication has first gas vent and second gas vent, the other end of first gas vent and intake pipe is linked together, the one end fixed intercommunication that the second gas-storage tube is kept away from the second gas-storage tube has the bellows, be linked together between first movable block and the clean subassembly, the bottom fixed lug fixed mounting has the front-end fixed lug fixed mounting.
Preferably, the inside activity of first gas storage pipe has cup jointed the first piston board that is located the discharge valve top, and the bottom fixed mounting of first piston board has the inside first piston rod that is located first gas storage pipe, and the bottom of first piston rod runs through the bottom of first gas storage pipe and is connected with the top of first movable block.
Preferably, the outer side surface of the first piston rod is movably sleeved with a first reset spring, and the upper end and the lower end of the first reset spring are respectively connected with the bottom end of the first gas storage tube and the top end of the first movable block.
Preferably, the one-way valves are arranged in the air inlet pipe and the air outlet valve, and the directions of the valves are respectively that the valves are conducted to the inside of the first air storage pipe and cut off to the outside of the first air storage pipe, and the valves are conducted to the outside of the first air storage pipe and cut off to the inside of the first air storage pipe.
Preferably, the top end of the second gas storage pipe is fixedly communicated with an air inlet valve, the second piston plate is movably sleeved in the second gas storage pipe, the bottom end of the second piston plate is fixedly connected with a second piston rod positioned in the second gas storage pipe, and the bottom end of the second piston rod penetrates through the bottom end of the second gas storage pipe and is connected with the top end of the second movable block.
Preferably, the upper end and the lower end of the second reset spring are respectively connected with the bottom end of the second piston plate and the bottom end of the inner cavity of the second gas storage tube, the first gas outlet and the second gas outlet are internally provided with one-way valves, and the valve directions of the one-way valves positioned in the first gas outlet and the second gas outlet are conducted to the outside of the second gas storage tube and cut off to the inside of the second gas storage tube.
Preferably, the leveling cleaning component comprises an extension frame, a power tank is fixedly arranged at the other end of the extension frame, the right end of the power tank is communicated with the other end of the corrugated pipe, a three-way valve is fixedly communicated with the left end of the power tank, and a main shaft is movably connected in the middle of an inner cavity of the power tank.
Preferably, the impeller that is located the power jar inside has been cup jointed to the lateral surface of main shaft fixedly, and the top of main shaft runs through the top of power jar and fixed mounting has the driving gear, and the left end meshing of driving gear is connected with driven gear, and the extension axle has been cup jointed to driven gear's middle part fixedly, and the bottom fixed mounting of extension axle has the grinding wheel, and the left and right sides of three-way valve front end all is fixed to be linked together and is had the gas-supply pipe, and the shower nozzle that is located the both sides around the grinding wheel is all fixed to the other end of gas-supply pipe.
The beneficial effects of the invention are as follows:
1. according to the invention, the welding, polishing and cleaning are integrated by using air as power, the automatic descending of the leveling and cleaning assembly is realized by the power action of the air, the automatic ascending of the welding head is realized while the leveling and cleaning assembly is automatically descended, the switching process is completed, only the input of external air is required to be controlled in the whole process, the problem that the traditional device uses external equipment or performs disassembly and switching is avoided, the logic is met, the switching speed is higher, the operation is simple and convenient, and the welding efficiency is effectively improved.
2. According to the invention, the flow of high-pressure air is reused, the rotation of the impeller is realized by utilizing the flow velocity of the air, and finally, the rotary polishing of the polishing wheel is realized, meanwhile, the automatic cleaning of the chips on the surface of a workpiece can be realized by directly utilizing the flow of the air, and the polishing and cleaning operations are automatically carried out after the working state is switched, so that the method accords with intuition and does not need to use external power, the repeated and rapid switching of the working state can be realized, the welding procedure is simplified, and the welding quality and the welding efficiency are remarkably improved.
3. According to the invention, two welding modes are used in the welding process, namely argon arc welding is preferentially used for backing welding, so that the tightness of a vacuum welding line is effectively ensured, the welding strength and the welding line quality are both improved greatly by using the flux-cored welding wire CO gas to protect the welding filling surface, and meanwhile, the welding deformation is reduced due to the reduction of welding heat input, the advantages of the two welding modes are both considered, and the remarkable improvement of the welding efficiency, the welding quality and the cavity tightness is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the internal structure of the card slot of the present invention;
FIG. 3 is a schematic cross-sectional view showing the internal structure of a first gas storage tube of the present invention;
FIG. 4 is a schematic cross-sectional view showing the internal structure of a second gas storage tube of the present invention;
FIG. 5 is a schematic illustration of the cooperation of a second movable block and a flattening cleaning assembly configuration of the present invention;
FIG. 6 is a schematic view of the bottom end structure of the flattening cleaning assembly of the present invention;
FIG. 7 is a schematic view of the sole structure of the leveling cleaning assembly in accordance with the present invention;
FIG. 8 is a schematic diagram of a welding method according to the present invention.
In the figure: 1. a frame; 2. a clamping groove; 3. fixing the ear plate; 4. a first movable block; 5. a second movable block; 6. a clamping block; 7. a welding head; 8. a first gas storage tube; 9. a first piston plate; 10. a first piston rod; 11. a first return spring; 12. an air inlet pipe; 13. an exhaust valve; 14. a second gas storage tube; 15. an intake valve; 16. a first exhaust port; 17. a second exhaust port; 18. a second piston plate; 19. a second piston rod; 20. a second return spring; 21. a bellows; 22. leveling the cleaning assembly; 221. an extension rack; 222. a power tank; 223. a three-way valve; 224. an impeller; 225. a main shaft; 226. a drive gear; 227. a driven gear; 228. an extension shaft; 229. grinding wheel; 2210. a gas pipe; 2211. a spray head; 100. a first steel plate; 105. a second steel plate; 108. argon arc welding of the weld; 110. and (5) covering the welding line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 8, in the embodiment of the invention, the welding device comprises a frame 1, clamping grooves 2 are respectively formed on the left side and the right side of an inner cavity of the frame 1, a first movable block 4 is movably clamped in the clamping groove 2 on the left side, a second movable block 5 is movably clamped in the clamping groove 2 on the right side, clamping blocks 6 are fixedly connected to the ends, relatively close to each other, of the first movable block 4 and the second movable block 5, the first movable block 4 and the second movable block 5 are movably clamped with the clamping groove 2 through the clamping blocks 6, a first air storage pipe 8 is arranged above the first movable block 4, a second air storage pipe 14 is arranged above the second movable block 5, the first movable block 4 and the second movable block 5 are arranged in a diagonal line, the leveling cleaning component 22 is installed to the bottom of second movable block 5, the left side fixed intercommunication that the side outside of first gas tube 8 is close to the bottom has discharge valve 13, the right side fixed intercommunication that the side outside of first gas tube 8 is close to the bottom has intake pipe 12, the left and right sides that the second gas tube 14 is close to the bottom is fixed the intercommunication respectively has first gas vent 16 and second gas vent 17, first gas vent 16 is linked together with the other end of intake pipe 12, the one end fixed intercommunication that second gas vent 17 kept away from second gas tube 14 has bellows 21, be linked together between bellows 21 and the leveling cleaning component 22, the bottom fixed mounting of first movable block 4 has soldered connection 7, the front and back both sides at frame 1 middle part are all fixed mounting and are fixed otic placode 3.
Before practical use, the welding device and the free mechanical arm are connected through the fixed lug plate 3 arranged on the outer side surface of the frame 1, so that the welding device is ensured to have high freedom degree to meet welding requirements of different angles and different positions, meanwhile, the air inlet valve 15 is required to be connected with an external high-pressure gas output device, meanwhile, the first air storage pipe 8, the second air storage pipe 14 and the external free mechanical arm are fixedly connected, and structural stability between the frame 1, the first air storage pipe 8 and the second air storage pipe 14 and the external free mechanical arm is ensured, and meanwhile, cleanliness of the surface of the welding head 7 is ensured.
As shown in fig. 2, 3 and 4, a first piston plate 9 positioned above an exhaust valve 13 is movably sleeved in the first air storage pipe 8, a first piston rod 10 positioned in the first air storage pipe 8 is fixedly arranged at the bottom end of the first piston plate 9, the bottom end of the first piston rod 10 penetrates through the bottom end of the first air storage pipe 8 and is connected with the top end of the first movable block 4, a first reset spring 11 is movably sleeved on the outer side surface of the first piston rod 10, the upper end and the lower end of the first reset spring 11 are respectively connected with the bottom end of the first air storage pipe 8 and the top end of the first movable block 4, one-way valves are respectively arranged in the air inlet pipe 12 and the exhaust valve 13, the directions of the valves are respectively conducting towards the inside of the first air storage pipe 8 and blocking towards the outside of the first air storage pipe 8, and conducting towards the outside of the first air storage pipe 8 and blocking towards the inside of the first air storage pipe 8, the top of second gas-storage tube 14 fixedly communicates there is air inlet valve 15, the inside activity of second gas-storage tube 14 has cup jointed second piston plate 18, the bottom fixedly connected with of second piston plate 18 is located the inside second piston rod 19 of second gas-storage tube 14, the bottom of second piston rod 19 runs through the bottom of second gas-storage tube 14 and is connected with the top of second movable block 5, the upper and lower both ends of second reset spring 20 are connected with the bottom of second piston plate 18 and the bottom of second gas-storage tube 14 inner chamber respectively, the check valve is all installed to the inside of first gas vent 16 and second gas vent 17, the valve direction that is located the inside check valve of first gas vent 16 and second gas vent 17 is switched on to second gas-storage tube 14 outside and is blocked to second gas-storage tube 14 inside.
In one embodiment, when welding is performed, the welding position may be subjected to spot welding operation through the welding head 7, after welding is completed, external air may be input into the air inlet valve 15, at this time, the air is then conveyed into the second air storage pipe 14, the second piston plate 18 is then subjected to downward pressure, and drives the second piston plate 18 and the second piston rod 19 to move downward, at this time, the second return spring 20 is then compressed, the second movable block 5 moves downward and drives the leveling cleaning component 22 to move downward, and when the second piston plate 18 moves to the bottom ends of the first air outlet 16 and the second air outlet 17, part of the air may be conveyed to the air inlet pipe 12 through the first air outlet 16 and enter into the first air storage pipe 8, at this time, the first piston plate 9 moves upward, and drives the first piston rod 10 and the first movable block 4 to move upward, at this time, the welding head 7 moves upward, and the first return spring 11 is compressed, at this time, the leveling cleaning component 22 approaches the workpiece and the welding head 7 moves away from the workpiece, and the switching process is completed.
Through utilizing air as power to with welding and polishing and clean integrated design, realize the automatic decline of clean subassembly 22 of flattening through the power effect of air, and realize the automatic rising of soldered connection 7 when the clean subassembly 22 of flattening descends voluntarily, accomplish the switching process, the whole in-process only need control outside air input can, avoid traditional device to use external equipment or dismantle the problem of switching, accord with the logic, the switching speed is faster, easy and simple to handle, effectively improved welding efficiency.
As shown in fig. 4 and 5 and fig. 6 and 7, the leveling cleaning assembly 22 comprises an extension frame 221, a power tank 222 is fixedly arranged at the other end of the extension frame 221, the right end of the power tank 222 is communicated with the other end of the corrugated pipe 21, a three-way valve 223 is fixedly communicated with the left end of the power tank 222, a main shaft 225 is movably connected to the middle part of the inner cavity of the power tank 222, an impeller 224 positioned inside the power tank 222 is fixedly sleeved on the outer side surface of the main shaft 225, the top end of the main shaft 225 penetrates through the top end of the power tank 222 and is fixedly provided with a driving gear 226, a driven gear 227 is meshed with the left end of the driving gear 226, an extension shaft 228 is fixedly sleeved on the middle part of the driven gear 227, a grinding wheel 229 is fixedly arranged at the bottom end of the extension shaft 228, gas pipes 2210 are fixedly communicated to the left side and the right side of the front end of the three-way valve 223, and spray heads 2211 positioned on the front side and the rear side of the grinding wheel 229 are fixedly communicated with each other.
In an embodiment, when the leveling cleaning assembly 22 is lowered to the workpiece after the switching is completed, part of the air in the second air storage tube 14 can be discharged through the second air outlet 17 and enter the power tank 222 through the bellows 21, the impeller 224 in the power tank 222 is impacted by the air and rotates under the action of the air, the spindle 225 rotates and drives the driving gear 226 above the impeller 224 to rotate, the driven gear 227 rotates and drives the extension shaft 228 at the bottom end and the polishing wheel 229 to rotate, the polishing wheel 229 is close to the workpiece at the moment, and the air in the power tank 222 can be led out through the three-way valve 2210 and the spray head 2211 to automatically clean the surface of the workpiece, thereby completing the polishing and cleaning process.
Through recycling the flow of high-pressure air, through utilizing the velocity of flow of air to realize impeller 224's rotation to finally realize polishing wheel 229's rotation and polish, but the flow of direct utilization air realizes the automatically cleaning of work piece surface piece simultaneously, and polishes and clean operation and go on for the automation after the operating condition switches, accords with intuition and need not to use external power, can realize the repeated quick switching of operating condition, has simplified welding procedure, is showing improvement welding quality and welding efficiency.
For example, the invention also provides a welding method of the welding device, which is applied to the welding device and comprises the following steps:
s1: firstly, preparing a steel plate to be welded, blanking, keeping the flatness of the surface of the steel plate, at the moment, cleaning the surface of a welding joint 7 after the degree of freedom of a welding device is ensured by connecting a fixed lug plate 3 and a free mechanical arm, ensuring that the surface of the welding joint 7 is free from greasy dirt and rust, and moving the welding device to a welding position by controlling the free mechanical arm to finish the preparation before welding;
s2: at the moment, the welding head 7 is controlled to be close to the welding point, spot welding is carried out through the welding head 7, at the moment, argon arc welding is used as shielding gas for backing welding, the effective thickness of the backing is ensured to be more than two millimeters, and PT flaw detection equipment is needed to be used for carrying out surface flaw detection after the spot welding is finished;
s3: by inputting external high-pressure gas into the second gas storage tube 14 through the gas inlet valve 15, the second piston plate 18 and the second piston rod 19 descend along with the high-pressure gas until the second piston plate 18 moves to the bottom ends of the first gas outlet 16 and the second gas outlet 17, the second movable block 5 descends along with the first gas outlet 16 and the second gas outlet 17, the leveling cleaning assembly 22 is driven to descend, part of the gas in the second gas storage tube 14 can enter the first gas storage tube 8 through the first gas outlet 16 and the gas inlet tube 12, the first piston plate 9 is pressurized upwards and drives the first piston rod 10 and the first movable block 4 to move upwards, the welding head 7 moves upwards along with the second piston plate 18, and the automatic descending of the leveling cleaning assembly 22 and the automatic upward moving process of the welding head 7 are completed;
s4: part of the gas in the second gas storage tube 14 can be input into the power tank 222 through the second gas outlet 17 and the corrugated tube 21, at the moment, the impeller 224 rotates along with the second gas outlet and drives the driving gear 226 to rotate, the driven gear 227 rotates along with the second gas outlet, the extension shaft 228 at the bottom end and the polishing wheel 229 rotate along with the second gas outlet, the polishing surface can be polished at the moment when the leveling cleaning assembly 22 reaches the working position, and meanwhile, the gas in the power tank 222 can be finally discharged through the three-way valve 223 and the gas delivery tube 2210 and acts on the surface of a workpiece to finish automatic cleaning through the spray head 2211;
s5: after finishing grinding and cleaning, the gas input by the air inlet valve 15 can be cut off, at the moment, the second reset spring 20 automatically resets and drives the leveling cleaning assembly 22 to automatically move upwards, and the exhaust valve 13 is opened to release the gas in the first gas storage pipe 8, the first reset spring 11 automatically resets and drives the welding head 7 to automatically descend to finish switching, and then welding is performed again, at the moment, the flux-cored wire CO is used 2 Filling the cover surface with gas shielded welding, finishing welding, and repeating the PT flaw detection and cleaning againAnd cleaning and grinding to finish the welding process.
By using two welding modes in the welding process, namely, argon arc welding is preferentially used for backing welding, the tightness of a vacuum welding seam is effectively ensured, and a flux-cored wire CO is used subsequently 2 The gas shielded welding filling cover surface has the advantages of both welding strength and welding quality, greatly improves the welding efficiency, reduces the welding deformation because of the reduction of welding heat input, and realizes the remarkable improvement of the welding efficiency, the welding quality and the cavity tightness.
Referring to fig. 8, the argon arc welding is used for backing, and the first steel plate 100 and the second steel plate 105 are welded to form an argon arc welding seam 108, so that the tightness of the vacuum welding seam is ensured; and then the flux-cored wire CO2 gas shielded welding is used for filling the cover surface, so that the cover surface welding seam 110 is formed, the welding strength and the welding seam quality are both considered, the welding efficiency is greatly improved, and meanwhile, the welding deformation is reduced due to the reduction of the welding heat input.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The welding method for sealing the high-vacuum cavity is applied to a welding device and is characterized in that: the welding device comprises a frame (1), clamping grooves (2) are formed in the left side and the right side of an inner cavity of the frame (1), a first movable block (4) is movably clamped in the left side clamping groove (2), a second movable block (5) is movably clamped in the right side clamping groove (2), a clamping block (6) is fixedly connected to one end, relatively close to the first movable block (4) and the second movable block (5), of the first movable block (4), the second movable block (5) is movably clamped between the clamping block (6) and the clamping groove (2), a first air storage pipe (8) is arranged above the first movable block (4), a second air storage pipe (14) is arranged above the second movable block (5), a cleaning assembly (22) is arranged at the bottom end of the second movable block (5), an exhaust valve (13) is fixedly communicated with the left side, relatively close to the bottom end, of the first air storage pipe (8), a right side, close to the bottom end (12) is fixedly communicated with the left air inlet pipe (16), a second air storage pipe (16) is fixedly communicated with the left side, and the second air storage pipe (16) is communicated with the second air outlet (16), the left side, the second air inlet pipe (16) is fixedly communicated with the air outlet (16), one end of the second exhaust port (17) far away from the second air storage pipe (14) is fixedly communicated with a corrugated pipe (21), the corrugated pipe (21) is communicated with a leveling cleaning assembly (22), a welding head (7) is fixedly arranged at the bottom end of the first movable block (4), and fixed ear plates (3) are fixedly arranged on the front side and the rear side of the middle part of the frame (1);
the inside of the first air storage pipe (8) is movably sleeved with a first piston plate (9) positioned above the exhaust valve (13), a first piston rod (10) positioned inside the first air storage pipe (8) is fixedly arranged at the bottom end of the first piston plate (9), and the bottom end of the first piston rod (10) penetrates through the bottom end of the first air storage pipe (8) and is connected with the top end of the first movable block (4);
the outer side surface of the first piston rod (10) is movably sleeved with a first reset spring (11), and the upper end and the lower end of the first reset spring (11) are respectively connected with the bottom end of the first air storage pipe (8) and the top end of the first movable block (4);
the air inlet pipe (12) and the air outlet valve (13) are respectively provided with one-way valves, and the directions of the valves are respectively that the valves are communicated towards the inside of the first air storage pipe (8) and are blocked towards the outside of the first air storage pipe (8), and the valves are communicated towards the outside of the first air storage pipe (8) and are blocked towards the inside of the first air storage pipe (8);
an air inlet valve (15) is fixedly communicated with the top end of the second air storage pipe (14), a second piston plate (18) is movably sleeved in the second air storage pipe (14), a second piston rod (19) positioned in the second air storage pipe (14) is fixedly connected to the bottom end of the second piston plate (18), and the bottom end of the second piston rod (19) penetrates through the bottom end of the second air storage pipe (14) and is connected with the top end of the second movable block (5);
the upper end and the lower end of the second return spring (20) are respectively connected with the bottom end of the second piston plate (18) and the bottom end of the inner cavity of the second air storage pipe (14), one-way valves are arranged in the first air outlet (16) and the second air outlet (17), and the valve directions of the one-way valves positioned in the first air outlet (16) and the second air outlet (17) are communicated to the outside of the second air storage pipe (14) and blocked to the inside of the second air storage pipe (14);
the leveling cleaning assembly (22) comprises an extension frame (221), a power tank (222) is fixedly arranged at the other end of the extension frame (221), the right end of the power tank (222) is communicated with the other end of the corrugated pipe (21), a three-way valve (223) is communicated with the left end of the power tank (222), and a main shaft (225) is movably connected with the middle part of the inner cavity of the power tank (222);
the outer side surface of the main shaft (225) is fixedly sleeved with an impeller (224) positioned in the power tank (222), the top end of the main shaft (225) penetrates through the top end of the power tank (222) and is fixedly provided with a driving gear (226), the left end of the driving gear (226) is connected with a driven gear (227) in a meshed mode, the middle of the driven gear (227) is fixedly sleeved with an extension shaft (228), the bottom end of the extension shaft (228) is fixedly provided with a grinding wheel (229), the left side and the right side of the front end of the three-way valve (223) are fixedly communicated with air delivery pipes (2210), and the other ends of the air delivery pipes (2210) are fixedly communicated with spray heads (2211) positioned on the front side and the rear side of the grinding wheel (229);
the welding method comprises the following steps:
s1: firstly, preparing a steel plate to be welded, blanking, keeping the flatness of the surface of the steel plate, at the moment, cleaning the surface of a welding joint (7) after the degree of freedom of a welding device is ensured by connecting a fixed lug plate (3) and a free mechanical arm, ensuring that the surface of the welding joint (7) is free from greasy dirt and rust, and moving the welding device to a welding position by controlling the free mechanical arm to finish the preparation before welding;
s2: at the moment, the welding head (7) is controlled to be close to the welding point, spot welding is carried out through the welding head (7), at the moment, TIG argon arc welding is used as shielding gas for backing welding, the effective thickness of the backing is ensured to be more than two millimeters, and PT flaw detection equipment is needed to be used for carrying out surface flaw detection after the spot welding is finished;
s3: the external high-pressure gas is input into the second gas storage tube (14) through the gas inlet valve (15), at the moment, the second piston plate (18) and the second piston rod (19) are lowered along with the second gas storage tube until the second piston plate (18) is moved to the bottom ends of the first gas outlet (16) and the second gas outlet (17), at the moment, the second movable block (5) is lowered relative to the frame (1) along with the second gas storage tube, the leveling cleaning assembly (22) is driven to be lowered, at the moment, part of the gas in the second gas storage tube (14) can be conveyed into the first gas storage tube (8) through the first gas outlet (16) and the gas inlet tube (12), at the moment, the first piston plate (9) is subjected to upward pressure and drives the first piston rod (10) and the first movable block (4) to be moved upwards, at the moment, the welding head (7) is moved upwards along with the second piston plate, and the automatic lowering of the leveling cleaning assembly (22) and the automatic lifting process of the welding head (7) are completed;
s4: part of gas in the second gas storage tube (14) can be input into the power tank (222) through the second gas outlet (17) and the corrugated tube (21), at the moment, the impeller (224) rotates along with the second gas storage tube, the driving gear (226) is driven to rotate, the driven gear (227) rotates along with the second gas storage tube, the extension shaft (228) at the bottom end and the polishing wheel (229) rotate along with the second gas storage tube, the welding surface can be polished at the moment when the leveling cleaning assembly (22) reaches the working position, and meanwhile, the gas in the power tank (222) can be finally discharged through the three-way valve (223) and the gas transmission tube (2210) to act on the surface of a workpiece to finish automatic cleaning;
s5: after finishing the repairing and cleaning, the gas input by the air inlet valve (15) can be cut off, at the moment, the second reset spring (20) automatically resets and drives the leveling cleaning assembly (22) to automatically move upwards, and the exhaust valve (13) is opened to release the gas in the first gas storage pipe (8), the first reset spring (11) automatically resets and drives the welding head (7) to automatically descend to finish the switching and then to weld again, at the moment, the flux-cored wire CO2 gas shielded welding is used for filling the cover surface, the welding is finished, and then the PT flaw detection and cleaning and repairing work can be repeated again to finish the welding flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310670672.2A CN116393790B (en) | 2023-06-08 | 2023-06-08 | Welding method for sealing high-vacuum cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310670672.2A CN116393790B (en) | 2023-06-08 | 2023-06-08 | Welding method for sealing high-vacuum cavity |
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| CN116393790B true CN116393790B (en) | 2023-10-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203973076U (en) * | 2014-05-16 | 2014-12-03 | 苏州塔可盛电子科技有限公司 | A kind of automatic soldering device with clean polishing function |
| CN106808060A (en) * | 2017-03-28 | 2017-06-09 | 凯盛重工有限公司 | A kind of process for ensureing vacuum coating cavity weld joint air-tight and intensity |
| CN110961768A (en) * | 2019-12-26 | 2020-04-07 | 宋佳 | 3D welding seam detection integrated intelligent welding system |
| CN115319273A (en) * | 2022-07-01 | 2022-11-11 | 江苏科钛机器人有限公司 | Laser welding equipment with real-time cleaning welding face |
| CN116141335A (en) * | 2023-03-30 | 2023-05-23 | 河南工业职业技术学院 | Direct-drive type numerical control machining robot |
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2023
- 2023-06-08 CN CN202310670672.2A patent/CN116393790B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203973076U (en) * | 2014-05-16 | 2014-12-03 | 苏州塔可盛电子科技有限公司 | A kind of automatic soldering device with clean polishing function |
| CN106808060A (en) * | 2017-03-28 | 2017-06-09 | 凯盛重工有限公司 | A kind of process for ensureing vacuum coating cavity weld joint air-tight and intensity |
| CN110961768A (en) * | 2019-12-26 | 2020-04-07 | 宋佳 | 3D welding seam detection integrated intelligent welding system |
| CN115319273A (en) * | 2022-07-01 | 2022-11-11 | 江苏科钛机器人有限公司 | Laser welding equipment with real-time cleaning welding face |
| CN116141335A (en) * | 2023-03-30 | 2023-05-23 | 河南工业职业技术学院 | Direct-drive type numerical control machining robot |
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| CN116393790A (en) | 2023-07-07 |
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