Steel structural part laser welding device and welding method thereof

Abstract

The invention discloses a steel structural part laser welding device and a welding method thereof, and relates to the technical field of steel structural part laser welding, the steel structural part laser welding device comprises an operation table and a machine base, the machine base is provided with a laser welding mechanism, the laser welding mechanism comprises a control set and a welding head, and the side, close to the welding head, of the laser welding mechanism is fixedly connected with a hanging bracket. The steel structural part laser welding device and the welding method thereof have the beneficial effects that in the steel structural part laser welding process, protective gas is introduced into the gas nozzle and then sprayed to the current laser welding position, weld joint protection is achieved, in the process, the recovery pump is started, and the gas nozzle is started; the recovery pump collects the protective gas escaping from the current laser welding position and guides the protective gas into the recovery frame, the protective gas extrudes the sealing plate and gradually escapes from the escaping holes in the lower portion to flow to the weld joint close to the current welding position, and therefore the effect that the just-solidified weld joint of the part is continuously protected, and the oxidation risk of the weld joint is reduced is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding of steel structural parts, and in particular to a laser welding device for steel structural parts and a welding method thereof. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. Laser welding equipment is required when welding steel structures.

[0003] During the welding operation, the existing laser welding device blows a shielding gas into the welding position to prevent the weld from being oxidized or deformed during solidification. However, the weld that has just solidified, that is, the weld near the welding position, still needs to be ventilated and protected. After the shielding gas blown out by the shielding gas blowing mechanism passes through the weld at the current welding position, it dissipates irregularly into the air and cannot protect the just solidified weld. On the one hand, there is a certain oxidation risk for the just solidified weld, and on the other hand, it causes a waste of shielding gas, which leads to the lack of use value of the laser welding device for steel structures. Summary of the invention

[0004] The present invention discloses a laser welding device for steel structural parts, aiming to solve the technical problems that in the existing laser welding device, a protective gas is blown into the welding position during welding operation to prevent the weld from being oxidized or deformed during solidification; however, the weld that has just solidified, that is, the weld close to the welding position, still needs to be ventilated and protected, and the protective gas blown out by the protective gas blowing mechanism irregularly dissipates into the air after passing through the weld at the current welding position, and cannot protect the weld that has just solidified, which, on the one hand, causes a certain oxidation risk for the weld that has just solidified, and on the other hand, causes a waste of protective gas.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A laser welding device for steel structural parts comprises an operating table and a machine base, wherein a laser welding mechanism is provided on the machine base, the laser welding mechanism comprises a control group and a welding head, and a hanger is fixedly connected to a side of the laser welding mechanism close to the welding head, an extension protection component is provided on the hanger, the extension protection component comprises a recovery frame and a semicircular adjustment rail, and the semicircular adjustment rail is fixedly connected to one side of the hanger, contact airbags are fixedly connected to both ends of the bottom of the recovery frame, both side inner walls of the recovery frame are connected to sealing plates by hinges, and the two sealing plates are in contact with each other, a dispersion hole is provided at the bottom of the recovery frame between the two sealing plates, connecting spring rods are fixedly connected at equal distances on the downwardly facing inclined surfaces of the two sealing plates, and one end of the connecting spring rod is fixedly connected to one side of the recovery frame.

[0006] By providing an extended protection component, during the laser welding process of steel structures, the shielding gas is introduced into the air nozzle and then sprayed toward the current laser welding position to achieve weld protection. During this process, the recovery pump is started to collect the shielding gas escaping from the current laser welding position and introduce it into the recovery frame. The shielding gas squeezes the sealing plate and gradually escapes from the escape hole below and flows to the weld near the current welding position, thereby continuously protecting the newly solidified weld and reducing its oxidation risk. At the same time, the shielding gas is recycled, the utilization rate of the shielding gas is improved, and the shielding gas loss is reduced.

[0007] In a preferred solution, the hanger is fixedly connected to a motor frame on one side below the semicircular adjusting rail, and the motor frame is fixedly connected to a driving motor on the side facing the semicircular adjusting rail, the output shaft of the driving motor is fixedly connected to the driving shaft through a coupling, the end of the driving shaft is fixedly connected to a rotating frame, one side of the rotating frame is fixedly connected to an adjusting slider, the adjusting slider is slidably connected to the inside of the semicircular adjusting rail, the bottom of the rotating frame is fixedly connected to a mounting ring, the inside of the mounting ring is fixedly connected to an air nozzle, the outer side wall of the air nozzle is fixedly connected to the mounting frame, and the recovery frame is fixedly connected to one side of the mounting frame.

[0008] In a preferred solution, the outer wall of the air nozzle near the bottom end is fixedly connected with a guide arc cover, and the outer wall of the air nozzle located above the guide arc cover is fixedly connected with an interception arc cover, a guide hole is opened on the arc surface facing upwards of the interception arc cover, and a recovery ring pipe is fixedly connected to the interception arc surface at the periphery of the guide hole, and the outer wall of the recovery ring pipe facing the air nozzle and away from the air nozzle are both provided with recovery holes, a recovery pump is fixedly connected to the top of the mounting frame, a gas suction end of the recovery pump is fixedly connected with a recovery pipe, one end of the recovery pipe is plugged into the interior of the recovery ring pipe, a gas delivery end of the recovery pump is fixedly connected with an input pipe, one end of the input pipe is plugged into the interior of the recovery frame, a shielding gas storage tank is fixedly connected to the top of the laser welding mechanism, a gas delivery end of the shielding gas storage tank is fixedly connected with a long gas delivery pipe, one end of the long gas delivery pipe is plugged into the interior of the air nozzle, and the outer wall of the long gas delivery pipe close to the shielding gas storage tank is connected to a solenoid valve through a flange.

[0009] In a preferred embodiment, a semi-sealing component is provided at the periphery of the welding head, and the semi-sealing component includes a super semicircular sealing cover, which is fixedly connected to the outer wall of the welding head, and the outer wall of the super semicircular sealing cover is fixedly connected to a matching sealing cover, and the air nozzle is located between the super semicircular sealing cover and the matching sealing cover.

[0010] By providing a semi-sealed component, during the laser welding process, after the shielding gas is sprayed out, the sealing airbag fits tightly against the surface of the steel structure, and the sealing airbag, the super semicircular sealing cover and the matching sealing cover achieve semi-sealing, thereby limiting the escape direction of the shielding gas and preventing it from escaping to a position far away from the weld, thereby further reducing the loss of shielding gas.

[0011] In a preferred embodiment, a sealing airbag is fixedly connected to the bottom of the super semicircular sealing cover, and an exhaust hole is opened on the outer wall of the sealing airbag, an exhaust pipe is fixedly connected to the inside of the exhaust hole, and an air valve is connected to the outer wall of the exhaust pipe through a flange, and an air pump is fixedly connected to the top of the super semicircular sealing cover, and an inflation tube is fixedly connected to the air delivery end of the air pump, and one end of the inflation tube is inserted into the interior of the sealing airbag.

[0012] In a preferred solution, a connecting rod is fixedly connected to the top of the recovery frame, and a cooling and shaping component is provided at one end of the connecting rod. The cooling and shaping component includes a fixed plate, which is fixedly connected to one end of the connecting rod. A hydraulic cylinder three is fixedly connected to the top of the fixed plate, and an output end of the hydraulic cylinder three is fixedly connected to a lifting frame. The inner walls on both sides of the lifting frame are fixedly connected to the same shaping roller. The shaping roller is a hollow structure, and a cooling nozzle is provided on the outer side wall of the shaping roller facing downward. Both side walls of the shaping roller are connected to auxiliary shaping arc plates by hinges, and the opposite sides of the two auxiliary shaping arc surfaces are fixedly connected to a self-adjusting spring rod, and one end of the self-adjusting spring rod is fixedly connected to the outer side wall of the shaping roller. An exhaust fan is fixedly connected to the top of the fixed plate, and the air supply end of the exhaust fan is connected to the inside of the shaping roller through a pipeline.

[0013] By providing a cooling and shaping component, when the welding position of the steel structure is away from the welding head and it is in a solidified state, the hydraulic cylinder is adjusted to drive the shaping roller to contact the bottom of the weld. During the contact process, the auxiliary shaping arc plate on the periphery of the shaping roller fits toward the inner wall of the weld, and the weld is shaped and squeezed by the shaping roller and the two auxiliary shaping arc plates to avoid abnormal shape of the weld. At the same time, the exhaust fan is started, and the exhaust fan draws the gas into the shaping roller, and sprays it into the weld through the cooling nozzle, thereby accelerating the cooling and shaping of the weld.

[0014] In a preferred solution, an adjustment track is fixedly connected to the top of the operating table, and a reciprocating adjustment frame is slidably connected to the adjustment track, a positioning mechanism is provided on the top of the reciprocating adjustment frame, an end block is fixedly connected to one side of the operating table, a hydraulic cylinder 1 is fixedly connected to the side of the end block facing the reciprocating adjustment frame, and an output end of the hydraulic cylinder 1 is fixedly connected to one side of the reciprocating adjustment frame.

[0015] The cam is secured to the bottom of the two wheels and has two guide wheels connected thereto, wherein the guide wheels are secured to the bottom of the two wheels and are in contact with the workbench, the guide wheels being secured to the bottom of the two wheels.

[0016] By providing a positioning mechanism, before laser welding of steel structures, two steel structures are inserted from one end of the travel frame, and the clamping plates on both sides squeeze the two steel structures under the action of the extrusion spring rod 1, so that the two steel structures move toward the middle and contact. During the positioning process, when the two steel structures are positioned and docked, the hydraulic cylinder 2 is adjusted to drive the pressure sensor to contact and squeeze the rear of the clamping plate. When the pressure sensor reaches the specified value, the hydraulic cylinder 2 stops adjusting, thereby realizing the self-clamping clamping plate limitation, avoiding the misalignment and offset of the steel structures during the laser welding process. After the positioning is completed, the hydraulic cylinder 1 is adjusted to drive the positioning mechanism to move, and the welding position of the steel structure is moved to the bottom of the welding head for precise positioning to improve the accuracy of welding.

[0017] In a preferred solution, the positioning base plate is fixedly connected to a travel frame on one side close to the adjustment track, and a positioning slot is opened on the bottom inner wall of the travel frame, and two positioning slide blocks are slidably connected inside the positioning slot, and the tops of the two positioning slide blocks are fixedly connected to clamping plates, and the opposite sides of the two clamping plates are fixedly connected to a pressing pad 1, and the opposite sides of the two clamping plates are fixedly connected to an extrusion spring rod 1 at equal distances, and one end of the extrusion spring rod 1 is fixedly connected to an inner wall of one side of the travel frame, and the inner walls on both sides of the travel frame are fixedly connected to hydraulic cylinders 2, and the output ends of the two hydraulic cylinders 2 are fixedly connected to pressure sensors, and the pressure sensors are close to the clamping plates.

[0018] A laser welding method for steel structure, using a laser welding device for steel structure as described above, comprises the following steps: Step 1: insert two steel structures from one end of the travel frame, and the clamping plates on both sides squeeze the two steel structures under the action of the squeezing spring rod 1. After the positioning is completed, adjust the hydraulic cylinder 1 to drive the positioning mechanism to move, and move the welding position of the steel structure to below the welding head; Step 2: Then adjust the angle of the welding head according to the welding position. After the angle adjustment of the welding head is completed, the dynamic drive motor drives the rotating frame to rotate, thereby realizing the angle adjustment of the air nozzle, so that the protective gas sprayed by the air nozzle is always located at the current welding position of the welding head, and then start the laser welding operation; Step 3: During the laser welding process, an external pushing mechanism pushes the steel structure so that the steel structure gradually passes under the welding head, thereby completing the overall welding operation of the steel structure.

[0019] From the above, it can be seen that a laser welding device for steel structures provided by the present invention has the function of introducing shielding gas into the air nozzle during the laser welding process of steel structures, and then spraying it toward the current laser welding position to achieve weld protection. During this process, the recovery pump is started to collect the shielding gas escaping from the current laser welding position and introduce it into the recovery frame. The shielding gas squeezes the sealing plate and gradually escapes from the escape hole below and flows to the weld near the current welding position, thereby continuously protecting the newly solidified weld and reducing its oxidation risk. At the same time, the shielding gas is recycled, the utilization rate of the shielding gas is improved, and the loss of the shielding gas is reduced. Technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a laser welding device for steel structures proposed by the present invention.

[0021] Figure 2 This is a front view of the overall structure of a laser welding device for steel structures proposed by the present invention.

[0022] Figure 3 for Figure 1 A magnified view of the local structure.

[0023] Figure 4 This is a schematic diagram of the structure of an extended protection component of a steel structure laser welding device proposed by the present invention.

[0024] Figure 5 This is an enlarged view of the recovery frame and interception arc cover structure of a steel structure laser welding device proposed by the present invention.

[0025] Figure 6 for Figure 5 Flipped cross-sectional view of the overall structure.

[0026] Figure 7 This is a schematic diagram of the structure of a semi-sealed component of a steel structure laser welding device proposed by the present invention.

[0027] Figure 8 This is a schematic structural diagram of a cooling and shaping component of a steel structure laser welding device proposed by the present invention.

[0028] Fig. 9 This is a schematic structural diagram of a positioning mechanism of a laser welding device for steel structures proposed in the present invention.

[0029] Fig.10 for Fig. 9 Schematic diagram of the plan structure.

[0030] Fig.11 The present invention provides a schematic diagram of the combined structure of an anti-lifting frame and a pressing cushion for a laser welding device for a steel structure.

[0031] In the figure: 1, operating table; 2, end block; 3, hydraulic cylinder 1; 4, adjusting track; 5, positioning mechanism; 501, positioning bottom plate; 502, travel frame; 503, sliding roller 1; 504, side frame; 505, clamping plate; 506, telescopic connecting rod; 507, pressing cushion 1; 508, positioning slide; 509, pressure sensor; 510, hydraulic cylinder 2; 511, squeezing spring rod 1; 512, positioning slide; 513, pressing cushion 2; 5 14. Extrusion spring rod 2; 515. Anti-lifting frame; 6. Laser welding mechanism; 7. Long gas pipe; 8. Protective gas storage tank; 9. Machine base; 10. Hanger; 11. Sliding roller 2; 12. Connecting rod; 13. Extended protection assembly; 1301. Recovery frame; 1302. Escape hole; 1303. Contact airbag; 1304. Air jet nozzle; 1305. Intercept arc cover; 1306. Mounting ring; 1307. Drive shaft; 1308. Adjustment slider; 1 309, rotating frame; 1310, semicircular adjustment rail; 1311, driving motor; 1312, motor frame; 1313, recovery pipe; 1314, recovery ring pipe; 1315, recovery hole; 1316, outlet hole; 1317, guide arc cover; 1318, recovery pump; 1319, mounting frame; 1320, input pipe; 1321, sealing plate; 1322, connecting spring rod; 14, semi-sealing assembly; 1401, super semi-circular sealing cover; 1402, Air pump; 1403, inflation tube; 1404, exhaust pipe; 1405, air valve; 1406, sealing airbag; 1407, matching sealing cover; 15, cooling and shaping assembly; 1501, fixing plate; 1502, hydraulic cylinder three; 1503, exhaust fan; 1504, self-adjusting spring rod; 1505, cooling spray hole; 1506, auxiliary shaping arc plate; 1507, shaping pressure roller; 1508, lifting frame; 16, shaft plate; 17, reciprocating adjustment frame. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] A laser welding device for steel structural parts disclosed in the present invention is mainly used in existing laser welding devices. During welding operation, a protective gas is blown into the welding position to prevent the weld from being oxidized or deformed during solidification. However, the weld that has just solidified, that is, the weld close to the welding position, still needs to be ventilated and protected. After the protective gas blown out by the protective gas blowing mechanism passes through the weld at the current welding position, it irregularly dissipates into the air and cannot protect the weld that has just solidified. On the one hand, this causes a certain oxidation risk for the weld that has just solidified, and on the other hand, it causes a waste of protective gas.

[0034] Reference Figure 1-Figure 11 A laser welding device for steel structural parts comprises an operating table 1 and a machine base 9, wherein a laser welding mechanism 6 is arranged on the machine base 9, the laser welding mechanism 6 comprises a control group and a welding head, and a hanger 10 is fixedly connected to a side of the laser welding mechanism 6 close to the welding head, an extension protection assembly 13 is arranged on the hanger 10, the extension protection assembly 13 comprises a recovery frame 1301 and a semicircular adjustment rail 1310, and the semicircular adjustment rail 1310 is fixedly connected to one side of the hanger 10, contact airbags 1303 are fixedly connected to both ends of the bottom of the recovery frame 1301, sealing plates 1321 are connected to the inner walls of both sides of the recovery frame 1301 through hinges, and the two sealing plates 1321 are in contact with each other, and a dispersion hole 1302 is opened at the bottom of the recovery frame 1301 between the two sealing plates 1321, and connecting spring rods 1322 are fixedly connected at equal distances on the downwardly facing inclined surfaces of the two sealing plates 1321, and one end of the connecting spring rod 1322 is fixedly connected to one side of the recovery frame 1301.

[0035] In a specific application scenario, during the laser welding process of steel structures, the shielding gas is introduced into the air nozzle 1304 and then sprayed toward the current laser welding position to achieve weld protection. During this process, the recovery pump 1318 is started to collect the shielding gas escaping from the current laser welding position and introduce it into the recovery frame 1301. The shielding gas squeezes the sealing plate 1321 and gradually escapes from the escape hole 1302 below and flows to the weld near the current welding position, thereby continuously protecting the newly solidified weld and reducing its oxidation risk. At the same time, the shielding gas is recycled, the utilization rate of the shielding gas is improved, and the shielding gas loss is reduced.

[0036] Specifically, before laser welding, the angle of the welding head is adjusted according to the welding position of the steel structure. After the adjustment is completed, the drive motor 1311 is started to drive the rotating frame 1309 to rotate, thereby realizing the angle adjustment of the air nozzle 1304, so that the protective gas ejected by the air nozzle 1304 is always located at the current welding position of the welding head, thereby improving the weld protection effect.

[0037] It should be noted that the shielding gas is recycled during the welding process. This part of the shielding gas is the shielding gas that escapes into the space above the weld. Part of it is collected from the outlet hole 1316 between the guide arc hood 1317 and the interception arc hood 1305, and part of it is collected from the space above the interception arc hood 1305 to ensure that the shielding gas at the laser welding position is adequately filled, and while achieving extended protection, it will not affect the current protection position.

[0038] Reference Figure 1-Figure 6 In a preferred embodiment, a motor frame 1312 is fixedly connected to one side of the hanger 10 below the semicircular adjustment rail 1310, and a drive motor 1311 is fixedly connected to the side of the motor frame 1312 facing the semicircular adjustment rail 1310, and an output shaft of the drive motor 1311 is fixedly connected to a drive shaft 1307 through a coupling, and a rotating frame 1309 is fixedly connected to the end of the drive shaft 1307, and an adjusting slider 1308 is fixedly connected to one side of the rotating frame 1309, and the adjusting slider 1308 is fixedly connected to the adjusting slider 1308. 08 is slidably connected to the inside of the semicircular adjustment rail 1310, the bottom of the rotating frame 1309 is fixedly connected to the mounting ring 1306, the inside of the mounting ring 1306 is fixedly connected to the air nozzle 1304, the outer wall of the air nozzle 1304 is fixedly connected to the mounting frame 1319, the recovery frame 1301 is fixedly connected to one side of the mounting frame 1319, the outer wall of the air nozzle 1304 near the bottom is fixedly connected to the guide arc cover 1317, and the air nozzle 1304 is located on the outer wall above the guide arc cover 1317 The intercepting arc cover 1305 is fixedly connected, and a guide hole 1316 is opened on the arc surface facing upward of the intercepting arc cover 1305. A recovery ring pipe 1314 is fixedly connected to the intercepting arc surface at the periphery of the guide hole 1316. The outer wall of the recovery ring pipe 1314 facing the air nozzle 1304 and away from the air nozzle 1304 are both provided with recovery holes 1315. The top of the mounting frame 1319 is fixedly connected to a recovery pump 1318, and the air extraction end of the recovery pump 1318 is fixedly connected to a recovery pipe 1313. The recovery pipe 131 One end of 3 is plugged into the inside of the recovery ring pipe 1314, the gas delivery end of the recovery pump 1318 is fixedly connected to the input pipe 1320, one end of the input pipe 1320 is plugged into the inside of the recovery frame 1301, the top of the laser welding mechanism 6 is fixedly connected to the protective gas storage tank 8, the gas delivery end of the protective gas storage tank 8 is fixedly connected to the long gas delivery pipe 7, one end of the long gas delivery pipe 7 is plugged into the inside of the air nozzle 1304, and the outer wall of the long gas delivery pipe 7 close to the protective gas storage tank 8 is connected to a solenoid valve through a flange.

[0039] Reference Figure 1 , Figure 3 and Figure 7In a preferred embodiment, a semi-sealed component 14 is provided at the periphery of the welding head, and the semi-sealed component 14 includes a super semi-circular sealing cover 1401, which is fixedly connected to the outer wall of the welding head, and the outer wall of the super semi-circular sealing cover 1401 is fixedly connected to a matching sealing cover 1407, the air nozzle 1304 is located between the super semi-circular sealing cover 1401 and the matching sealing cover 1407, the bottom of the super semi-circular sealing cover 1401 is fixedly connected to a sealing airbag 1406, and the outer wall of the sealing airbag 1406 is provided with an exhaust hole, the inside of the exhaust hole is fixedly connected to an exhaust pipe 1404, the outer wall of the exhaust pipe 1404 is connected to an air valve 1405 through a flange, the top of the super semi-circular sealing cover 1401 is fixedly connected to an air pump 1402, the air supply end of the air pump 1402 is fixedly connected to an inflation pipe 1403, and one end of the inflation pipe 1403 is plugged into the interior of the sealing airbag 1406.

[0040] Specifically, during the laser welding process, after the shielding gas is sprayed out, the sealing airbag 1406 fits tightly against the surface of the steel structure, and the sealing airbag 1406, the super semicircular sealing cover 1401 and the matching sealing cover 1407 achieve semi-sealing, thereby limiting the escape direction of the shielding gas and preventing it from escaping to a position far away from the weld, thereby further reducing the loss of the shielding gas.

[0041] Reference Figure 1 , Figure 2 , Figure 3 and Figure 8 In a preferred embodiment, the top of the recycling frame 1301 is fixedly connected with a connecting rod 12, and one end of the connecting rod 12 is provided with a cooling and shaping component 15, the cooling and shaping component 15 includes a fixed plate 1501, the fixed plate 1501 is fixedly connected to one end of the connecting rod 12, the top of the fixed plate 1501 is fixedly connected with a hydraulic cylinder 3 1502, the output end of the hydraulic cylinder 3 1502 is fixedly connected with a lifting frame 1508, the inner walls of both sides of the lifting frame 1508 are fixedly connected with the same shaping roller 1507, the shaping roller 1507 It is a hollow structure, and a cooling nozzle 1505 is opened on the outer side wall of the shaping roller 1507 facing downward, and the two side walls of the shaping roller 1507 are connected to auxiliary shaping arc plates 1506 through hinges, and the opposite sides of the two auxiliary shaping arc surfaces are fixedly connected to self-adjusting spring rods 1504, and one end of the self-adjusting spring rod 1504 is fixedly connected to the outer side wall of the shaping roller 1507, and the top of the fixed plate 1501 is fixedly connected to an exhaust fan 1503, and the air supply end of the exhaust fan 1503 is connected to the inside of the shaping roller 1507 through a pipeline.

[0042] It should be noted that when the welding position of the steel structure is away from the welding head and it is in a solidified state, the hydraulic cylinder 1502 is adjusted to drive the shaping roller 1507 to contact the bottom of the weld. During the contact process, the auxiliary shaping arc plate 1506 on the periphery of the shaping roller 1507 fits toward the inner wall of the weld, and the weld is shaped and squeezed by the shaping roller 1507 and the two auxiliary shaping arc plates 1506 to avoid abnormal shape of the weld. At the same time, the exhaust fan 1503 is started, and the exhaust fan 1503 introduces the drawn gas into the shaping roller 1507, and sprays it into the weld through the cooling nozzle 1505 to accelerate the cooling and shaping of the weld.

[0043] Reference Figure 1 , Figure 2 , Fig. 9 and Fig.10 In a preferred embodiment, an adjusting rail 4 is fixedly connected to the top of the operating platform 1, and a reciprocating adjusting frame 17 is slidably connected to the adjusting rail 4, a positioning mechanism 5 is provided on the top of the reciprocating adjusting frame 17, an end block 2 is fixedly connected to one side of the operating platform 1, a hydraulic cylinder 3 is fixedly connected to the side of the end block 2 facing the reciprocating adjusting frame 17, and an output end of the hydraulic cylinder 3 is fixedly connected to one side of the reciprocating adjusting frame 17.

[0044] Reference Figure 1 , Fig. 9 , Fig.10 and Fig.11In a preferred embodiment, the positioning mechanism 5 includes a positioning base plate 501, and the positioning base plate 501 is fixedly connected to the top of the reciprocating adjustment frame 17, the bottom of the positioning base plate 501 is fixedly connected to two shaft plates 16, and the opposite sides of the two shaft plates 16 are equidistantly connected to sliding rollers 11 through bearings, and the sliding rollers 11 are in contact with the table surface of the operating table 1. A groove is opened on the top of the positioning base plate 501, and the inner walls of both sides of the groove are equidistantly connected to sliding rollers 1 503 through bearings, and the two sides of the positioning base plate 501 away from the adjustment track 4 are fixedly connected to side frames 504, and the opposite sides of the two side frames 504 are equidistantly fixedly connected to telescopic connecting rods 506, and the two sides of the two side frames 504 facing downward are equidistantly fixedly connected to extrusion spring rods 2 514, and the bottoms of multiple extrusion spring rods 2 514 located on the same side frame 504 are fixedly connected to the same anti-top Lifting frame 515, the bottom of the anti-top lifting frame 515 is fixedly connected with a pressing pad 2 513, the side of the positioning base plate 501 close to the adjusting track 4 is fixedly connected with a traveling frame 502, and the bottom inner wall of the traveling frame 502 is provided with a positioning slot 508, the inner sliding connection of the positioning slot 508 is connected with two positioning sliders 512, the tops of the two positioning sliders 512 are fixedly connected with clamping plates 505, the opposite sides of the two clamping plates 505 are fixedly connected with a pressing pad 1 507, the opposite sides of the two clamping plates 505 are fixedly connected with an extrusion spring rod 1 511 at an equal distance, one end of the extrusion spring rod 1 511 is fixedly connected to the inner wall of one side of the traveling frame 502, the inner walls of both sides of the traveling frame 502 are fixedly connected with hydraulic cylinder 2 510, the output ends of the two hydraulic cylinders 2 510 are fixedly connected with pressure sensors 509, and the pressure sensors 509 are close to the clamping plates 505.

[0045] Specifically, before laser welding of steel structures, two steel structures are inserted from one end of the travel frame 502, and the clamping plates 505 on both sides squeeze the two steel structures under the action of the squeezing spring rod 1 511, so that the two steel structures move toward the middle and contact. During the positioning process, when the two steel structures are positioned and docked, the hydraulic cylinder 2 510 is adjusted to drive the pressure sensor 509 to contact and squeeze the rear of the clamping plate 505. When the pressure sensor 509 reaches the specified value, the hydraulic cylinder 2 510 stops adjusting, thereby realizing the self-clamping of the clamping plate 505 to limit the displacement of the steel structures during the laser welding process. After the positioning is completed, the hydraulic cylinder 1 3 is adjusted to drive the positioning mechanism 5 to move, and the welding position of the steel structure is moved to the bottom of the welding head for precise positioning to improve the accuracy of welding.

[0046] It should be noted that when the external pushing mechanism pushes the two steel structures, the welded parts of the steel structures move to the bottom of the two anti-lifting frames 515. The anti-lifting frames 515 squeeze the steel structures under the action of the squeezing spring rod 514 to prevent local warping and misalignment of welding points, thereby ensuring the stability of the steel structures during the pushing process.

[0047] A laser welding method for steel structure, using a laser welding device for steel structure as described above, comprises the following steps: Step 1: insert two steel structures from one end of the travel frame 502, and the clamping plates 505 on both sides squeeze the two steel structures under the action of the squeezing spring rod 1 511. After the positioning is completed, adjust the hydraulic cylinder 1 3 to drive the positioning mechanism 5 to move, and move the welding position of the steel structure to below the welding head; Step 2: Then adjust the angle of the welding head according to the welding position. After the angle adjustment of the welding head is completed, the dynamic drive motor 1311 drives the rotating frame 1309 to rotate, thereby realizing the angle adjustment of the air nozzle 1304, so that the protective gas sprayed by the air nozzle 1304 is always located at the current welding position of the welding head, and then start the laser welding operation; Step 3: During the laser welding process, an external pushing mechanism pushes the steel structure so that the steel structure gradually passes under the welding head, thereby completing the overall welding operation of the steel structure.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser welding device for steel structure, comprising an operating table (1) and a machine base (9), characterized in that: The machine base (9) is provided with a laser welding mechanism (6), the laser welding mechanism (6) comprising a control group and a welding head, and a hanger (10) is fixedly connected to a side of the laser welding mechanism (6) close to the welding head, and an extension protection component (13) is provided on the hanger (10), and the extension protection component (13) comprises a recovery frame (1301) and a semicircular adjustment rail (1310), and the semicircular adjustment rail (1310) is fixedly connected to one side of the hanger (10), and both ends of the bottom of the recovery frame (1301) are fixedly connected to the semicircular adjustment rail (1310). A contact airbag (1303) is connected, and the inner walls on both sides of the recovery frame (1301) are connected to sealing plates (1321) through hinges, and the two sealing plates (1321) are in contact with each other. The bottom of the recovery frame (1301) located between the two sealing plates (1321) is provided with an escape hole (1302), and connecting spring rods (1322) are fixedly connected at equal distances on the downward inclined surfaces of the two sealing plates (1321), and one end of the connecting spring rod (1322) is fixedly connected to one side of the recovery frame (1301).

2. A laser welding device for steel structure according to claim 1, characterized in that: The hanger (10) is fixedly connected to a motor frame (1312) on one side below the semicircular adjustment rail (1310), and the motor frame (1312) is fixedly connected to a drive motor (1311) on one side facing the semicircular adjustment rail (1310); the output shaft of the drive motor (1311) is fixedly connected to a drive shaft (1307) via a coupling; the end of the drive shaft (1307) is fixedly connected to a rotating frame (1309); one side of the rotating frame (1309) is fixedly connected to an adjustment slider (1308); the adjustment slider (1308) is slidably connected to the inside of the semicircular adjustment rail (1310); the bottom of the rotating frame (1309) is fixedly connected to a mounting ring (1306); the inside of the mounting ring (1306) is fixedly connected to an air nozzle (1304); the outer side wall of the air nozzle (1304) is fixedly connected to a mounting frame (1319); and the recovery frame (1301) is fixedly connected to one side of the mounting frame (1319).

3. A laser welding device for steel structure according to claim 2, characterized in that: The outer wall of the air nozzle (1304) near the bottom end is fixedly connected to a guide arc cover (1317), and the outer wall of the air nozzle (1304) located above the guide arc cover (1317) is fixedly connected to an interception arc cover (1305), an outlet hole (1316) is opened on the arc surface facing upward of the interception arc cover (1305), and a recovery ring pipe (1314) is fixedly connected to the interception arc surface at the periphery of the outlet hole (1316), and the outer wall of the recovery ring pipe (1314) facing the air nozzle (1304) and away from the air nozzle (1304) are both opened with recovery holes (1315), and the top of the mounting frame (1319) is fixedly connected to a recovery pump (1318), and the recovery pump (1318) is fixedly connected to the top of the mounting frame (1319). The air extraction end of the recovery pump (1318) is fixedly connected to a recovery pipe (1313), one end of the recovery pipe (1313) is plugged into the interior of the recovery ring pipe (1314), the air delivery end of the recovery pump (1318) is fixedly connected to an input pipe (1320), one end of the input pipe (1320) is plugged into the interior of the recovery frame (1301), the top of the laser welding mechanism (6) is fixedly connected to a protective gas storage tank (8), the air delivery end of the protective gas storage tank (8) is fixedly connected to a long gas delivery pipe (7), one end of the long gas delivery pipe (7) is plugged into the interior of the air nozzle (1304), and the outer wall of the long gas delivery pipe (7) close to the protective gas storage tank (8) is connected to a solenoid valve through a flange.

4. A laser welding device for steel structure according to claim 3, characterized in that: A semi-sealing component (14) is provided at the periphery of the welding head, and the semi-sealing component (14) comprises a super-semicircular sealing cover (1401), the super-semicircular sealing cover (1401) is fixedly connected to the outer side wall of the welding head, the outer side wall of the super-semicircular sealing cover (1401) is fixedly connected to a matching sealing cover (1407), and the air nozzle (1304) is located between the super-semicircular sealing cover (1401) and the matching sealing cover (1407).

5. A laser welding device for steel structure according to claim 4, characterized in that: The bottom of the super-semicircular sealing cover (1401) is fixedly connected to a sealing airbag (1406), and the outer wall of the sealing airbag (1406) is provided with an exhaust hole, the interior of the exhaust hole is fixedly connected to an exhaust pipe (1404), the outer wall of the exhaust pipe (1404) is connected to an air valve (1405) via a flange, the top of the super-semicircular sealing cover (1401) is fixedly connected to an air pump (1402), the air delivery end of the air pump (1402) is fixedly connected to an inflation tube (1403), and one end of the inflation tube (1403) is plugged into the interior of the sealing airbag (1406).

6. A laser welding device for steel structure according to claim 5, characterized in that: The top of the recycling frame (1301) is fixedly connected to a connecting rod (12), and one end of the connecting rod (12) is provided with a cooling and shaping component (15), the cooling and shaping component (15) comprises a fixed plate (1501), the fixed plate (1501) is fixedly connected to one end of the connecting rod (12), the top of the fixed plate (1501) is fixedly connected to a hydraulic cylinder three (1502), the output end of the hydraulic cylinder three (1502) is fixedly connected to a lifting frame (1508), and the inner walls on both sides of the lifting frame (1508) are fixedly connected to the same shaping roller (1507), and the shaping roller (1507) is a central The hollow structure comprises a cooling nozzle (1505) on the outer side wall of the shaping roller (1507) facing downward, and the two side walls of the shaping roller (1507) are connected to auxiliary shaping arc plates (1506) through hinges, and the opposite sides of the two auxiliary shaping arc surfaces are fixedly connected to self-adjusting spring rods (1504), one end of the self-adjusting spring rod (1504) is fixedly connected to the outer side wall of the shaping roller (1507), and the top of the fixed plate (1501) is fixedly connected to an exhaust fan (1503), and the air supply end of the exhaust fan (1503) is connected to the inside of the shaping roller (1507) through a pipeline.

7. A laser welding device for steel structure according to claim 6, characterized in that: The top of the operating table (1) is fixedly connected to an adjustment rail (4), and a reciprocating adjustment frame (17) is slidably connected to the adjustment rail (4), a positioning mechanism (5) is provided on the top of the reciprocating adjustment frame (17), one side of the operating table (1) is fixedly connected to an end block (2), a side of the end block (2) facing the reciprocating adjustment frame (17) is fixedly connected to a hydraulic cylinder one (3), and an output end of the hydraulic cylinder one (3) is fixedly connected to one side of the reciprocating adjustment frame (17).

8. A laser welding device for steel structure according to claim 7, characterized in that: The positioning mechanism (5) comprises a positioning base plate (501), and the positioning base plate (501) is fixedly connected to the top of the reciprocating adjustment frame (17), and the bottom of the positioning base plate (501) is fixedly connected to two shaft plates (16), and the two shaft plates (16) are equidistantly connected to the opposite sides thereof through bearings with sliding rollers (11), and the sliding rollers (11) are in contact with the table surface of the operating table (1), and the top of the positioning base plate (501) is provided with a groove, and the inner walls of the two sides of the groove are equidistantly connected to sliding rollers (503) through bearings, and the positioning base plate ( The two sides of the two side frames (501) away from the adjustment track (4) are fixedly connected to side frames (504), and the opposite sides of the two side frames (504) are fixedly connected to telescopic connecting rods (506) at equal distances, and the two sides of the two side frames (504) facing downward are fixedly connected to extrusion spring rods (514) at equal distances, and the bottoms of multiple extrusion spring rods (514) located on the same side frame (504) are fixedly connected to the same anti-lifting frame (515), and the bottom of the anti-lifting frame (515) is fixedly connected to a pressing cushion (513).

9. A laser welding device for steel structure according to claim 8, characterized in that: The positioning base plate (501) is fixedly connected to a travel frame (502) on one side close to the adjustment track (4), and a positioning slot (508) is formed on the bottom inner wall of the travel frame (502). Two positioning sliders (512) are slidably connected inside the positioning slot (508). The tops of the two positioning sliders (512) are fixedly connected to a clamping plate (505). The opposite sides of the two clamping plates (505) are fixedly connected to a pressing cushion (507). The opposite sides of the two clamping plates (505) are fixedly connected to an extrusion spring rod (511) at an equal distance. One end of the extrusion spring rod (511) is fixedly connected to an inner wall of one side of the travel frame (502). The inner walls of both sides of the travel frame (502) are fixedly connected to hydraulic cylinders (510). The output ends of the two hydraulic cylinders (510) are fixedly connected to pressure sensors (509). The pressure sensors (509) are close to the clamping plates (505).

10. A steel structure laser welding method, using the steel structure laser welding device according to claim 9, characterized in that: The following steps are involved: Step 1: insert two steel structures from one end of the travel frame (502), and the clamping plates (505) on both sides squeeze the two steel structures under the action of the squeezing spring rod 1 (511). After the positioning is completed, adjust the hydraulic cylinder 1 (3) to drive the positioning mechanism (5) to move, and move the welding position of the steel structure to below the welding head; Step 2: Then adjust the angle of the welding head according to the welding position. After the angle adjustment of the welding head is completed, the dynamic drive motor (1311) drives the rotating frame (1309) to rotate, thereby realizing the angle adjustment of the air nozzle (1304), so that the protective gas sprayed by the air nozzle (1304) is always located at the current welding position of the welding head, and then start the laser welding operation; Step 3: During the laser welding process, an external pushing mechanism pushes the steel structure so that the steel structure gradually passes under the welding head, thereby completing the overall welding operation of the steel structure.

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