CN105478959A - Underwater dry electric arc welding device with nozzle and welding method - Google Patents
Underwater dry electric arc welding device with nozzle and welding method Download PDFInfo
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- CN105478959A CN105478959A CN201610025906.8A CN201610025906A CN105478959A CN 105478959 A CN105478959 A CN 105478959A CN 201610025906 A CN201610025906 A CN 201610025906A CN 105478959 A CN105478959 A CN 105478959A
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- 238000003466 welding Methods 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010891 electric arc Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 70
- 230000001141 propulsive effect Effects 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 19
- 230000005611 electricity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000007778 shielded metal arc welding Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying 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
- B23K9/0061—Underwater arc welding
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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
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
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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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
-
- 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
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
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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
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
-
- 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
-
- 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
- B23K9/325—Devices for supplying or evacuating shielding gas
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses an underwater dry electric arc welding device with a nozzle and a welding method. The welding device comprises a welding gun, a gas supply device and a control unit. The welding gun comprises a gun barrel and a welding handle. A gas inlet is formed in the gun barrel. An automatic clamping mechanism assembling a welding rod is arranged in the gun barrel. In the axial direction, a barrel cavity in one side of the gun barrel is connected with the gas outlet end of the gas supply device through the gas inlet, wherein an end opening of the barrel cavity of the side is provided with a gas nozzle and an end cover which is capable of being opened outwards and overturned, and the end cover is automatically controlled to be closed through an elastic mechanism. A pushing mechanism is arranged in a barrel cavity in the other side; and the automatic clamping mechanism is installed on the pushing mechanism and is driven by the pushing mechanism to move in the axial direction of the gun barrel. The underwater dry electric arc welding device is novel in design, convenient to operate and easy to achieve, the manner that shield gas is sprayed from the interior of the nozzle of the welding gun is adopted, a local space dry environment is formed rapidly, and dryness of the welding rod under underwater welding can be ensured.
Description
Technical field
The invention belongs to field of machining, relate to underwater welding technology, be specially a kind of underwater dry-type electric arc welder with nozzle and welding method.
Background technology
At present, Underwater Welding is just becoming a more and more popular and practical solder technology, be particularly useful for boats and ships, the occasion that underwater portion is keeped in repair much is needed in ocean engineering, but affect by working environment, also there is the difficult point of a lot of enforcement technology in Underwater Welding, comprise weld seam and welding material easily to intake and cause weld seam hydrogen content to increase, the potential safety hazard that the electric conductivity of water is brought, and workman does not see the position of electric arc and weld seam when welding in water, require more high to the operative skill of workman, wherein, when welding in water, the waterproof problem of weld seam and welding material is the most outstanding.In traditional water, dry type solder technology great majority are the confined spaces utilizing drainage arrangement to form a dry type, and then the method for carrying out welding is carried out.Such as there are forefathers on the helmet, add a welding enclosure, in welding enclosure, utilize air draining to form dry type space, although this method can accomplish weld in water and weld the same effect on the bank to greatest extent, but its cost is huge, device is complicated, and take time and effort, be not often suitable for the occasion of in water, Welding Structure being keeped in repair to especially emergency maintenance.And in existing welding method, adopt SMAW in water to compare welding wire and will save the mechanism such as very long wire convey soft pipe and very large wire reel, therefore in water, SMAW is again a kind of underwater welding method of current most prospect.So develop a set of waterproof problem that can either solve underwater electrode, the requirement to operative's technical ability when welding in water can be reduced again, can ensure again that the weldering device of welder's safety just seems particularly urgent and important simultaneously.
Summary of the invention
Technical purpose of the present invention be to provide a kind of improve prior art deficiency the underwater dry-type arc welding torch device of band nozzle and welding method, utilize gas draining, manufacture the dry type environment being applicable to welding.
For realizing above-mentioned technical purpose, technical scheme disclosed by the invention is:
With the underwater dry-type electric arc welder of nozzle, it is characterized in that, comprise welding gun, air feed equipment and control unit:
Described welding gun comprises gun barrel and electrode holder, gun barrel is provided with air inlet, the automatic clamping mechanism of assembling welding rod is provided with in gun barrel, on axial direction, the side tube chamber of gun barrel is connected with the outlet side of air feed equipment by described air inlet, and the port in this side pipe chamber is provided with gas nozzle, and is provided with the end cap of closed port, described end cap can overturn by external-open, and automatically controls to close by elastic mechanism; Propulsive mechanism is provided with in gun barrel opposite side tube chamber, described automatic clamping mechanism is arranged on described propulsive mechanism, driven by propulsive mechanism and move on gun barrel axial direction, described air feed equipment, automatic clamping mechanism, propulsive mechanism are connected with described control unit respectively.
On the basis of such scheme, improvement or preferred technical scheme also comprise further:
Described welder is also provided with welding rod warmer, described welding rod warmer is provided with the cylinder chamber that can be enclosed within welding gun gun barrel, cylinder port, chamber is provided with the cylinder chamber end cap of closed port, described cylinder chamber end cap can in open upset, and automatically control to close by elastic mechanism, welding rod location and installation, at the location mid-shaft in cylinder chamber, deposits a root bead bar in a warmer cylinder chamber.
Described welding rod warmer is provided with sealing ring outside end cap, and the internal diameter of described sealing ring agrees with the external diameter of the welding gun gun barrel section can inserting a chamber, gun barrel is just inserted in sealing ring, prevents from putting in warmer and intake.
Consider in underwater environment, simple dependence eyesight judges that the usage degree of welding rod is more difficult, propulsive mechanism or automatic clamping mechanism easily burn out, can on described propulsive mechanism or automatic clamping mechanism mounting temperature sensor, described temperature sensor is connected with described control unit.The principle that when utilizing welding rod to be soldered, electric arc can sharply rise from temperature close to temperature sensor, by electric arc automatic distinguishing, reduces operation easier when welding in water further.
The middle part of welding gun gun barrel is provided with the guide rail of the constraint propulsive mechanism direction of motion, and guide rail is electrically connected with the source of welding current by cable, and as the part of electrode, welding rod is electrically connected with guide rail by automatic clamping mechanism.
Described propulsive mechanism preferably adopts double-acting cylinder or hydraulic cylinder, and the chuck of automatic clamping mechanism is arranged on and stretches out on the piston rod of cylinder body; The current sensor detecting welding current is provided with in welding circuit, described cylinder or hydraulic cylinder are used for air inlet or the keying of inlet passing ratio solenoid control of the cavity advanced to gun barrel port side by piston rod, described current sensor, proportion magnetic valve are connected with control unit respectively, by the aperture of control unit according to the output signal control ratio magnetic valve of current sensor.
For a underwater dry-type electric arc welding method for welder described above, it is characterized in that, its welding process comprises the following steps:
Utilize current sensor to detect the current signal of welding circuit, and output detections signal is to control unit;
After welding process starts, the gas nozzle continued to welding gun introduces air-flow, is backed down by gun barrel end cap, is arranged by the water body in weld zone around gas nozzle;
Start welding gun propulsive mechanism, welding rod is pushed to gun barrel port, after workpiece encountered by welding rod, generation current in welding circuit, current sensor exports corresponding detection signals to control unit, control unit controls propulsive mechanism by welding rod pumpback one segment distance, and ignite electric arc, then control propulsive mechanism pushed forward welding rod and weld;
Utilize temperature sensor to judge the position relationship of automatic clamping device or propulsive mechanism and weld zone electric arc, and output detections signal is to control unit, when electrode feeding exceedes preset temperature to preset stoping point or temperature, automatically controls blow-out by control unit.
Further technical scheme also comprises:
Measure the proportionate relationship between welding current and electrode feeding speed before welding, in welding process, adjusted the pushing speed of propulsive mechanism according to the detection signal of described current sensor by control unit, make electrode feeding speed and burn-off rate suitable.
Described propulsive mechanism preferably adopts double-acting cylinder or hydraulic cylinder, the chuck of automatic clamping mechanism is arranged on and stretches out on the piston rod of cylinder body, described cylinder or hydraulic cylinder are used for air inlet or the keying of inlet passing ratio solenoid control of the cavity advanced to gun barrel port side by piston rod, control unit is according to the aperture of the output signal control ratio magnetic valve of current sensor, thus the fltting speed of adjustment cylinder or hydraulic cylinder.
For a underwater dry-type electric arc welding method for welder described above, it is characterized in that, the process of its assembling welding rod is:
Air-flow is introduced to welding gun gas nozzle, air-flow is utilized to back down closed gun barrel end cap, water body around nozzle is arranged, gun barrel nozzle is aimed at welding rod warmer port, utilize gun barrel to be backed down by warmer end cap, inserted by gun barrel in warmer cylinder chamber, the automatic clamping mechanism in gun barrel clamps welding rod after encountering welding rod, gun barrel is withdrawn from from warmer, welding rod is assemblied in gun barrel.
Beneficial effect:
Welder of the present invention and welding method is novel in design, easy to operate, use safety and be easy to realize; adopt the mode that protective gas sprays in torch neck; quick formation local space dry type environment; and the drying of welding rod when can ensure Underwater Welding; the invention process cost is low; and be easy to operation, be applicable to promoting the use of, can realize high-quality, efficient, save time, labour-saving submerge arc weldering welding process.
Accompanying drawing explanation
Fig. 1 is the structural representation of welding gun;
Fig. 2 is the structural representation of warmer;
Fig. 3 is the fundamental diagram of control unit;
Fig. 4 is the automatic blow-out theory diagram of welding rod;
Fig. 5 is the schematic flow sheet of welding process;
1:1-electrode holder in figure, 2-cable, 3-welds button, 4-pause button, 5-send bar button, and 6-supplies gas button, 7-air inlet, 8-air inlet, 9-piston rod, 10-torch neck, 11-piston rod guide rail, 12-waterproof insulation overcoat, 13-end cap, 14-elastic mechanism, 15-electromagnetic chuck, 16-temperature sensor, 17-welding rod, 18-air inlet.
In Fig. 2: the waterproof thermal-insulated overcoat of 19-, 20-elastic mechanism, 21-sealing ring, 22-end cap, 23-welding rod, 24-fixed support.
Detailed description of the invention
In order to illustrate technical scheme of the present invention and technical purpose, below in conjunction with drawings and the specific embodiments, the present invention is described further.
A underwater dry-type electric arc welder for be with nozzle, comprises welding gun, air feed equipment, welding rod warmer and circuit control system etc.
Described circuit control system by based on PLC control unit and be connected with control unit respectively magnetic valve (comprising proportion magnetic valve), temperature sensor, current sensor, displacement transducer etc. part form.
As shown in Figure 1, described welding gun comprise gun barrel and be provided with welding button 3, pause button 4, send bar button 5, receipt button, the electrode holder 1 of the control button such as button 6, clamp bar button of supplying gas, be provided with waterproof insulation overcoat 12 outside welding gun.
Described gun barrel is provided with air inlet 18, is provided with the automatic clamping mechanism of assembling welding rod 17, adopts electromagnetic clamping mechanism in the present embodiment in gun barrel.On gun barrel axial direction, gun barrel side tube chamber is connected with the outlet side of air feed equipment by described air inlet 18, the port in this side pipe chamber is provided with gas nozzle 10, and be provided with the end cap 13 of closed port, described end cap 13 is arranged on gun barrel by hinge, can overturn by external-open, and by elastic mechanism 14(as torsion spring) automatically control to close; The propulsive mechanism that double-acting miniature cylinder is formed is provided with in gun barrel opposite side tube chamber, described electromagnetic clamping mechanism is arranged on the end that double-acting miniature cylinder stretches out the piston rod 9 of cylinder body, under control unit controls, driven by cylinder and move on gun barrel axial direction, complete the propelling movement to welding rod 17 and pumpback action.
Described temperature sensor is arranged on the chuck of electromagnetic clamping mechanism, the middle part of gun barrel is provided with the guide rail 11 of constraint double-acting miniature cylinder piston rod 9 direction of motion, described guide rail 11 is electrically connected with the source of welding current by cable 2, as the part of electrode, welding rod 17 is electrically connected with guide rail 11 by electromagnetic clamping mechanism, forms welding circuit.
The current sensor detecting welding current is provided with in described welding circuit, the air inlet 7 passing ratio magnetic valve 1A4 that double-acting miniature cylinder is used for the cavity advanced to gun barrel port side by piston rod 9 controls to open and close, and the air inlet 8 of opposite side cavity is controlled by magnetic valve 1A2.
As shown in Figure 2, described welding rod warmer is provided with waterproof thermal-insulated overcoat 19 and deposits the cylinder chamber of welding rod 23, cylinder port, chamber is provided with the cylinder chamber end cap 22 of closed port, described cylinder chamber end cap 22 is arranged on welding rod warmer by hinge, can in open upset, and by elastic mechanism 20(as torsion spring) automatically control to close, welding rod 23 is by the location mid-shaft of fixed support 24 location and installation in cylinder chamber, conveniently aim at the electromagnetic clamping mechanism in welding gun, and only deposit a root bead bar in a warmer cylinder chamber.Welding rod warmer is provided with sealing ring 21 outside end cap, and the internal diameter of described sealing ring 21 agrees with the external diameter of the welding gun gun barrel section can inserting a chamber.
During welding, press the welding button 3 on electrode holder 1, the coil of proportion magnetic valve 1A4 obtains electric, and spool position moves, and compressed air enters from double-acting miniature cylinder air inlet 7, and cylinder piston rod 9 moves downward along guide rail 11 guide direction, and welding rod 17 is down sent to.After welding rod 17 and absorption surface, control unit output signal closes proportion magnetic valve 1A4 immediately, and open the magnetic valve 1A2 of the air inlet 8 that control piston bar moves upward, after welding rod 17 pumpback campaign 0.5s, ignite electric arc.Outputed signal by control unit after 0.5s, close air inlet 8, and open proportion magnetic valve 1A4, welding rod 17 is continued down to send to weld.Temperature sensor is equipped with in the chuck upper end of electromagnetism clamping mechanism, and when welding rod 17 is soon soldered, temperature sensor is due to now close to arc position, and temperature sharply rises.Control unit outputs signal, and solid-state relay SSR input loses signal, and output disconnects, and welding arc extinguishes, with burnout-proof piston rod 9 and chuck.During welding, the instant piston 9 of welding rod 17 feed rate down move down speed, the aperture of the speed that the moves down passing ratio magnetic valve 1A4 of piston rod 9 regulates, and before striking, welding rod 17 remains maximum toward proportion magnetic valve 1A4 aperture when moving down; After striking, by the current sensor of source of welding current inside, welding current is sent to the A/D module EM235 of PLC control unit, the digital module of PLC exports a pwm signal after amplifying circuit to the analog signal of proportion magnetic valve 1A4 coil one the 4 ~ 20mA proportional with welding current.The aperture of proportion magnetic valve 1A4 and the proportional relation of this analog quantity.In advance determine welding current and piston rod by engineer testing and move down proportionate relationship between speed, to ensure that electrode feeding speed is equal with burn-off rate.
What the present embodiment relied on double-acting miniature cylinder piston rod 9 moves up and down the automatic feed and the pumpback function that realize welding rod 1, does so mainly to avoid that welding in water is manual send bar, reduces operation easier.The size design of gas nozzle 10 should be of moderate size, if do to obtain too large welding gun operation inconvenience, too little then protection domain is too small, and after electric arc, weld seam easily soaks.The clamping of welding rod realizes by electromagnetic clamping mechanism, and the waterproof in welding process mainly ensures by spraying protective gas at a high speed from gas nozzle 10.
When adopting the underwater dry-type electric arc welder of band nozzle of the present invention to weld, can implement as follows:
Step 1: before lower water, first opens electric welding machine and PLC control cabinet on the coast and sets welding current.
Step 2: after lower water, first send protection gas and installs the first root bead bar.
Press the button 6 of supplying gas on electrode holder 1, the magnetic valve 1A1 coil of PLC control unit output signal Control protection gas obtains electric, and magnetic valve 1A1 opens.The gas of air feed equipment output is on the bank sent into from nozzle air inlet 18, backs down the end cap 13 below nozzle, and is arranged by the water body around weld zone.Now, piston rod 9 and electromagnetic chuck are all in the initial position at top dead centre place, and welding gun gun barrel is inserted warmer cylinder chamber, and when the bottom in welding rod warmer cylinder chamber contacts welding gun port, welding rod upper end just contacts with electromagnetic chuck.Now click the clamp bar button on electrode holder, the coil of electromagnetic chuck obtains electric, by welding rod 23 interlinear notes.After welding rod 23 end is clamped, gun barrel is withdrawn from from waterproof thermal-insulated device cylinder chamber.Rubber seal is equipped with in end cap 22 upper end of welding rod warmer, and under elastic mechanism 20 acts on, welding rod warmer is separated rear end cap 11 and can closes very soon with welding gun, unlikely immersion.
Step 3: after being adjusted the position of welding gun, presses welding button 3.The coil of PLC control unit output signal control ratio magnetic valve 1A4 obtains electric, and piston rod 9 follows track 11 of double-acting miniature cylinder moves down, and welding rod 17 is sent to downwards fast.After welding rod 17 and absorption surface, PLC control unit detects welding current, and export control signal, make the coil losing electricity of proportion magnetic valve 1A4, magnetic valve 1A2 obtains electric, and piston rod moves upward 0.5s, and welding rod pumpback, ignite electric arc.After 0.5s the coil of proportion magnetic valve 1A4 again electric, magnetic valve 1A2 dead electricity, welding rod continues to send to and welds.The speed that moves down of piston rod 9 is matched by Underwater Welding engineer testing and welding current.
Step 4: when welding rod is nearly soldered, experiences temperature by the temperature sensor on electromagnetic chuck top, and PLC control unit outputs signal welding arc automatic distinguishing, with burnout-proof piston rod 9 and electromagnetic chuck.Welding button 3 should be unclamped immediately after operating personnel find arc extinction.Now, the piston rod 9 of double-acting miniature cylinder in succession electromagnetic chuck should in lower dead center.Now press the receipt button on electrode holder, the coil of magnetic valve 1A2 obtains electric, and piston rod 9 moves, and trigger bit displacement sensor when above moving on to top dead centre, the coil losing electricity of magnetic valve 1A2, piston rod 9 is parked in top dead center position.Now click the clamp bar button on electrode holder again, by clamp bar push-button reset.Electromagnetic chuck coil KA3 dead electricity, the electrode stub do not burnt down is from gun barrel port Automatic-falling.
Step 4: repeat the action of installing welding rod in step 2.The action repeating step 3 after welding rod clamping is again welded.Process workpiece if need in welding process to suspend, click the pause button 4 on electrode holder, now PLC control unit output signal, control ratio magnetic valve 1A4 coil and magnetic valve 1A2 coil all dead electricity, welding rod no longer down send, arc extinction.Piston rod 9 is parked in as you were.To again weld, then press pause button 4, button reset, proportion magnetic valve 1A4 coil again electric, welding rod down send, and the action of welding rod pumpback striking is as described in step 3.
Step 5: at the end of welding process, first clicks the clamp bar button on electrode holder, is come off by electrode stub.Then click button 6 of supplying gas, button 6 of supplying gas resets.Now protect the valve core of the electromagnetic valve of gas to reset, protection air to close is fallen.The end cap 13 at nozzle place closes under elastic mechanism 14 acts on, in case immersion in gun barrel port (nozzle).Finally click the receipt button on electrode holder 1, piston rod 9 is got back to top dead center position and is prepared for welding next time.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and application claims protection domain is defined by appending claims, description and equivalent thereof.
Claims (10)
1. be with the underwater dry-type electric arc welder of nozzle, it is characterized in that, comprise welding gun, air feed equipment and control unit:
Described welding gun comprises gun barrel and electrode holder, gun barrel is provided with air inlet, the automatic clamping mechanism of assembling welding rod is provided with in gun barrel, on axial direction, the side tube chamber of gun barrel is connected with the outlet side of air feed equipment by described air inlet, and the port in this side pipe chamber is provided with gas nozzle, and is provided with the end cap of closed port, described end cap can overturn by external-open, and automatically controls to close by elastic mechanism; Propulsive mechanism is provided with in gun barrel opposite side tube chamber, described automatic clamping mechanism is arranged on described propulsive mechanism, driven by propulsive mechanism and move on gun barrel axial direction, described air feed equipment, automatic clamping mechanism, propulsive mechanism are connected with described control unit respectively.
2. the underwater dry-type electric arc welder of band nozzle according to claim 1, is characterized in that, is provided with welding rod warmer:
Described welding rod warmer is provided with the cylinder chamber that can be enclosed within welding gun gun barrel, cylinder port, chamber is provided with the cylinder chamber end cap of closed port, described cylinder chamber end cap can in open upset, and automatically control to close by elastic mechanism, welding rod location and installation, at the location mid-shaft in cylinder chamber, deposits a root bead bar in a warmer cylinder chamber.
3. the underwater dry-type electric arc welder of band nozzle according to claim 2, is characterized in that, described welding rod warmer is provided with sealing ring outside end cap, and the internal diameter of described sealing ring agrees with the external diameter of the welding gun gun barrel section can inserting a chamber.
4. the underwater dry-type electric arc welder of the band nozzle according to claim 1,2 or 3, is characterized in that, described propulsive mechanism or automatic clamping mechanism are provided with temperature sensor, and described temperature sensor is connected with described control unit.
5. the underwater dry-type electric arc welder of the band nozzle according to claim 1,2 or 3, it is characterized in that, the middle part of welding gun gun barrel is provided with the guide rail of the constraint propulsive mechanism direction of motion, guide rail is electrically connected with the source of welding current by cable, as the part of electrode, welding rod is electrically connected with guide rail by automatic clamping mechanism.
6. the underwater dry-type electric arc welder of the band nozzle according to claim 1,2 or 3, is characterized in that:
Described propulsive mechanism is double-acting cylinder or hydraulic cylinder, and the chuck of automatic clamping mechanism is arranged on and stretches out on the piston rod of cylinder body;
The current sensor detecting welding current is provided with in welding circuit, described cylinder or hydraulic cylinder are used for air inlet or the keying of inlet passing ratio solenoid control of the cavity advanced to gun barrel port side by piston rod, described current sensor, proportion magnetic valve are connected with control unit respectively, by the aperture of control unit according to the output signal control ratio magnetic valve of current sensor.
7., for a underwater dry-type electric arc welding method for welder as claimed in claim 1, it is characterized in that, its welding process comprises the following steps:
Utilize current sensor to detect the current signal of welding circuit, and output detections signal is to control unit;
After welding process starts, the gas nozzle continued to welding gun introduces air-flow, is backed down by gun barrel end cap, is arranged by the water body in weld zone around gas nozzle;
Start welding gun propulsive mechanism, welding rod is pushed to gun barrel port, after workpiece encountered by welding rod, generation current in welding circuit, current sensor exports corresponding detection signals to control unit, control unit controls propulsive mechanism by welding rod pumpback one segment distance, and ignite electric arc, then control propulsive mechanism pushed forward welding rod and weld;
Utilize temperature sensor to judge the position relationship of automatic clamping device or propulsive mechanism and weld zone electric arc, and output detections signal is to control unit, when electrode feeding exceedes preset temperature to preset stoping point or temperature, automatically controls blow-out by control unit.
8. welding method according to claim 7, it is characterized in that, measure the proportionate relationship between welding current and electrode feeding speed before welding, in welding process, adjusted the pushing speed of propulsive mechanism according to the detection signal of described current sensor by control unit, make electrode feeding speed and burn-off rate suitable.
9. welding method according to claim 8, it is characterized in that, described propulsive mechanism is double-acting cylinder or hydraulic cylinder, the chuck of automatic clamping mechanism is arranged on and stretches out on the piston rod of cylinder body, described cylinder or hydraulic cylinder are used for air inlet or the keying of inlet passing ratio solenoid control of the cavity advanced to gun barrel port side by piston rod, control unit is according to the aperture of the output signal control ratio magnetic valve of current sensor, thus the fltting speed of adjustment cylinder or hydraulic cylinder.
10. for a underwater dry-type electric arc welding method for welder as described in Claims 2 or 3, it is characterized in that, the process of its assembling welding rod is:
Air-flow is introduced to welding gun gas nozzle, air-flow is utilized to back down closed gun barrel end cap, water body around nozzle is arranged, gun barrel nozzle is aimed at welding rod warmer port, utilize gun barrel to be backed down by warmer end cap, inserted by gun barrel in warmer cylinder chamber, the automatic clamping mechanism in gun barrel clamps welding rod after encountering welding rod, gun barrel is withdrawn from from warmer, welding rod is assemblied in gun barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106392277A (en) * | 2016-11-28 | 2017-02-15 | 江苏海事职业技术学院 | Underwater local dry arc welding gun device generating vortex airflow |
| CN108274093A (en) * | 2017-12-19 | 2018-07-13 | 山西云度知识产权服务有限公司 | A kind of bridge construction welding set |
| CN109174488A (en) * | 2018-08-08 | 2019-01-11 | 西安交通大学 | A kind of underwater spray equipment |
| CN113070547A (en) * | 2021-04-19 | 2021-07-06 | 广西天正钢结构有限公司 | Steel structure on-site welding process |
| CN113452255A (en) * | 2021-06-03 | 2021-09-28 | 江苏科技大学 | Split type multifunctional underwater arc welding power supply and working method thereof |
| CN116268714A (en) * | 2023-04-14 | 2023-06-23 | 浙江旭达鞋业有限公司 | Gluing device for shoe processing and gluing method thereof |
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| CN106392277A (en) * | 2016-11-28 | 2017-02-15 | 江苏海事职业技术学院 | Underwater local dry arc welding gun device generating vortex airflow |
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| CN109174488A (en) * | 2018-08-08 | 2019-01-11 | 西安交通大学 | A kind of underwater spray equipment |
| CN113070547A (en) * | 2021-04-19 | 2021-07-06 | 广西天正钢结构有限公司 | Steel structure on-site welding process |
| CN113452255A (en) * | 2021-06-03 | 2021-09-28 | 江苏科技大学 | Split type multifunctional underwater arc welding power supply and working method thereof |
| CN116268714A (en) * | 2023-04-14 | 2023-06-23 | 浙江旭达鞋业有限公司 | Gluing device for shoe processing and gluing method thereof |
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Inventor after: Zhu Zhengyu Inventor after: Liu Guixiang Inventor after: Lu Ning Inventor after: Hu Jie Inventor after: Shen Yan Inventor after: Liu Junhua Inventor after: Liu Dandan Inventor after: Shen Zhongxiang Inventor after: Pan Yidong Inventor before: Zhu Zhengyu Inventor before: Xie Rong Inventor before: Lu Ning Inventor before: Hu Jie Inventor before: Shen Yan Inventor before: Liu Junhua Inventor before: Liu Dandan Inventor before: Shen Zhongxiang Inventor before: Pan Yidong |
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Effective date of registration: 20220207 Address after: 210000 office building 1, building a, Baguazhou entrepreneurship Park, No. 270, Lidao Road, Baguazhou street, Qixia District, Nanjing, Jiangsu Province- Patentee after: Nanjing xiangchuang Technology Co.,Ltd. Address before: No. 309, Jiangning District, Jiangning District, Nanjing, Jiangsu Patentee before: JIANGSU MARITIME INSTITUTE |
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