CN210878194U

CN210878194U - Full-automatic welding machine for automobile beam

Info

Publication number: CN210878194U
Application number: CN201921675714.7U
Authority: CN
Inventors: 巩用亭; 袁钥; 于汝臣
Original assignee: Shandong Yuehao Automation Equipment Co ltd
Current assignee: Shandong Yuehao Automation Equipment Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-30
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a full-automatic welding machine of automotive frame, it belongs to automotive frame welding field. The automatic welding machine mainly comprises a tool frame, wherein an automatic welding device capable of moving back and forth along the length direction of the tool frame is arranged above the tool frame, a movable beam capable of moving back and forth along the length direction of the tool frame is arranged on the automatic welding device, and more than one group of automatic welding guns capable of moving left and right along the length direction of the movable beam are arranged on the movable beam. The utility model discloses can weld multichannel welding seam simultaneously, realize the girder simultaneous welding more than two, and the girder realizes automatic upset, arranges greatly and has improved work efficiency. The utility model discloses mainly used automobile frame's welding.

Description

Full-automatic welding machine for automobile beam

Technical Field

The utility model belongs to automotive frame welding field, specifically speaking especially relates to an automotive frame full-automatic welding machine.

Background

The girder workpiece is a main component of a trailer frame, is arranged in the middle of the trailer frame and is generally divided into a left longitudinal beam and a right longitudinal beam, and the cross section of the girder workpiece is generally in an I-shaped structure. In the production process of the trailer, the girder needs to be welded, and the girder needs to be turned over after one side of the girder is welded so as to weld the other side. At present, the girder can not realize automatic overturning during welding, and the girder needs to be overturned by depending on a manual operation crane, so that the working efficiency is low. And the cambered surface structures on the two sides of the crossbeam workpiece are inconsistent, the existing welding machine cannot realize automatic welding, and the manual control welding machine has the defect of inconsistent welding thickness of the cambered surface structures on the two sides during welding, so that the welding quality is poor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the full-automatic welding machine for the automobile girders is capable of welding a plurality of welding seams simultaneously, realizing simultaneous welding of more than two girders, realizing automatic turnover of the girders and greatly improving the working efficiency.

The full-automatic welding machine for the automobile beam comprises a tool frame, wherein an automatic welding device capable of moving back and forth along the length direction of the tool frame is arranged above the tool frame, a movable beam capable of moving back and forth along the length direction of the tool frame is arranged on the automatic welding device, and more than one group of automatic welding guns capable of moving left and right along the length direction of the movable beam are arranged on the movable beam.

Preferably, the automatic welding device comprises a main body walking frame, supporting beams are arranged on two sides of the main body walking frame respectively, a second track and a rack four are arranged on each supporting beam, a sliding plate is arranged at the bottom of each movable beam, a small motor is fixedly connected onto each sliding plate, a gear four matched with the rack four is arranged at the output end of each small motor, and a movable sliding block matched with the second track is arranged below each sliding plate.

Preferably, the support beam is provided with a fixed beam which is fixedly connected, and the fixed beam is provided with more than one group of automatic welding guns which can move left and right along the length direction of the fixed beam.

Preferably, the automatic welding device is provided with a girder turnover mechanism below, the girder turnover mechanism comprises a turnover rack, a girder baffle and a girder pushing mechanism matched with the girder baffle are arranged on the turnover rack, a movable middle plate capable of moving up and down is arranged below the turnover rack, a main lifting mechanism is arranged below the movable middle plate, the movable middle plate is hinged with a turnover plate and a first telescopic mechanism, and the turnover plate is hinged with an extending end of the first telescopic mechanism.

Preferably, a pushing cylinder corresponding to the crossbeam baffle is arranged on the overturning rack.

Preferably, the bottom of the turnover rack is provided with a guide post which penetrates through the movable middle plate, and the bottom of the turnover rack is provided with a buffer cylinder matched with the crossbeam baffle.

Preferably, the automatic welding gun comprises a transverse travelling mechanism, the transverse travelling mechanism is provided with a wire feeder and a longitudinal travelling mechanism capable of moving up and down, the longitudinal travelling mechanism is provided with a powder outlet pipe, a powder suction pipe, a laser positioning probe and a rotating mechanism, the welding gun is arranged below the rotating mechanism, and the welding gun is matched with the wire feeder, the powder outlet pipe and the powder suction pipe.

Preferably, be equipped with the regulating plate on the vertical running gear, be equipped with rectangular hole on the regulating plate, be equipped with the support on powder outlet pipe and the powder suction pipe respectively, the support of powder outlet pipe and powder suction pipe all is fixed in on the regulating plate through rectangular hole, the regulating plate with be equipped with resilient means on the support.

Preferably, the top of the automatic welding device is provided with an electric welding machine, a welding powder storage barrel and a suction machine, the electric welding machine is matched with the wire feeder, the welding powder storage barrel is connected with the powder outlet pipe, and the suction machine is connected with the powder suction pipe.

Preferably, the automatic welding device comprises a main body walking frame, a first rail is arranged below the main body walking frame, a first motor and a roller matched with the first rail are arranged at the bottom of the main body walking frame, and the roller is connected with the first motor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model adds a plurality of girder turnover mechanisms on the tooling frame, the girder turnover mechanisms are matched with the turnover plate which can be turned over through the movable middle plate which can be lifted up and down, so that after a girder workpiece is welded, the movable middle plate drives the turnover plate to rise, the turnover plate jacks up one side of the girder workpiece, and the girder workpiece is further turned over through the turnover plate, so that the girder workpiece is changed from a horizontal state to a vertical state to prepare for turning over; a beam pushing mechanism is additionally arranged below the crossbeam baffle plate, and the beam pushing mechanism is matched with the crossbeam baffle plate, so that automatic overturning operation of a crossbeam workpiece is realized, and the working efficiency is improved;

2. the crossbeam turnover mechanism is additionally provided with the buffer cylinder, so that the crossbeam workpiece is prevented from falling rapidly due to gravity after being turned over, and noise pollution and damage to the turnover rack are avoided;

3. the main body walking frame of the automatic welding device is additionally provided with a fixed beam and a movable beam, more than one welding gun is arranged on the fixed beam, the welding guns can be controlled to stably track and weld one side of the crossbeams, more than one welding gun is also arranged on the movable beam, the other side of the crossbeams can be welded, the crossbeams with unequal cambered surface structures at two sides can be subjected to distance compensation by sliding back and forth, and stable welding quality can be achieved;

4. the automatic welding device adopts the laser positioning guidance technology, so that the positioning tracking is more accurate, manual interference is completely avoided, the burden of workers is reduced, and the welding efficiency is improved while the welding quality is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a reference for the use status of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an axial side schematic view of a girder turnover mechanism;

FIG. 5 is a schematic structural view of a girder turnover mechanism;

FIG. 6 is a schematic diagram of the cooperation between the movable middle plate and the main lifting mechanism;

FIG. 7 is a schematic view of the engagement of the fixed beam or the movable beam with the automatic welding torch;

FIG. 8 is a schematic view of an automatic welding gun;

FIG. 9 is a schematic view of a torch;

FIG. 10 is a schematic view of a heat slug;

FIG. 11 is a front view of the torch;

fig. 12 is a sectional view taken along line a-a in fig. 11.

In the figure, 1, a tool rack; 2. a girder turnover mechanism; 3. an automatic welding device; 4. a girder workpiece; 5. positioning a probe by laser; 6. a welding gun; 11. a roller; 31. a main body walking frame; 32. a fixed beam; 33. a movable beam; 34. a transverse traveling mechanism; 35. a longitudinal running mechanism; 36. a rotation mechanism; 37. an electric welding machine; 38. a welding powder storage barrel; 39. a material suction machine; 61. a conductive welding tip; 62. a heat dissipating block; 63. an insulating plate; 64. a hollow bolt; 65. a wire feeding pipe; 66. a guidewire channel; 67. a heat dissipating fin; 68. an insulating sleeve; 201. a main lifting mechanism; 202. a guide post; 203. overturning the rack; 204. a push cylinder; 205. a first telescopic mechanism; 206. a turnover plate; 207. a buffer cylinder; 208. a crossbeam baffle plate; 209. a beam pushing mechanism; 210. a movable middle plate; 211. a base plate; 311. a first track; 312. a roller; 313. a first motor; 331. a second track; 332. a rack four; 333. a fourth gear; 334. a movable slide block; 335. a small-sized motor; 341. a welding wire support; 342. a wire feeder; 343. a transverse moving frame; 344. a second sliding block; 345. a second slide rail; 346. a second rack; 347. a second gear; 351. a powder suction pipe; 352. a powder outlet pipe; 353. a longitudinal moving frame; 354. a second telescopic mechanism; 355. a third sliding block; 356. a third slide rail; 357. an adjusting plate; 358. a strip hole; 359. an elastic device; 362. a fixed cylinder; 363. rotating the rod; 364. a synchronizing wheel; 365. rotating the fixed frame; 366. and a third gear.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

the first embodiment is as follows: as shown in fig. 1, the full-automatic welding machine for the automobile beam comprises a tool frame 1, wherein a roller 11 is arranged on the tool frame 1, and the roller 11 is convenient for adjusting the position of a beam workpiece 4; an automatic welding device 3 capable of moving back and forth along the length direction of the tool frame 1 is arranged above the tool frame 1, a fixed beam 32 and a movable beam 33 capable of moving back and forth along the length direction of the tool frame 1 are arranged on the automatic welding device 3, and more than one group of automatic welding guns capable of moving left and right along the length direction of the movable beam 33 are respectively arranged on the fixed beam 32 and the movable beam 33.

As shown in fig. 7, in the present embodiment, two sets of automatic welding guns are respectively disposed on the fixed beam 32 and the movable beam 33, so that simultaneous welding operation of two girder workpieces 4 can be realized, the automatic welding guns on the fixed beam 32 weld one side of the girder workpieces 4, and the automatic welding guns on the movable beam 33 weld the other side of the girder workpieces.

As shown in fig. 1, the automatic welding device 3 includes a main body traveling frame 31, two support beams parallel to the tool rack 1 are arranged on the main body traveling frame 31, a fixed beam 32 and a movable beam 33 are mounted on the support beams, the fixed beam 32 and the movable beam 33 are arranged in parallel, and a second rack 346 and a second slide rail 345 are respectively arranged on the fixed beam 32 and the movable beam 33; a first rail 311 is arranged below the main body walking frame 31, the first rail 311 is fixed on the ground or other immovable bottom plates, a first motor 313 and a roller 312 matched with the first rail 311 are arranged at the bottom of the main body walking frame 31, and the roller 312 is connected with the first motor 313. The first motor 313 drives the main body walking frame 31 to move back and forth along the first rail 311 through the roller 312, so that the girder workpiece 4 is integrally welded.

As shown in fig. 2 and 3, the fixed beam 32 and the movable beam 33 are mounted on a support beam, the support beam is provided with a second track 331 and a rack four 332, the bottom of the movable beam 33 is provided with a sliding plate, the sliding plate is fixedly connected with a small motor 335, the output end of the small motor 335 is provided with a gear four 333 matched with the rack four 332, and the lower part of the sliding plate is provided with a movable slider 334 matched with the second track 331. The small motor 335 drives the movable beam 33 to move back and forth on the second rail 331, so that compensation welding of the arc-shaped structures on two sides of the girder workpiece 4, which are not equal, is realized, and the defects of poor welding quality, thin welding layer, low strength and the like on one side with a long radian due to the unequal arc-shaped structures are avoided.

As shown in fig. 8, the automatic welding gun includes a transverse traveling mechanism 34, the transverse traveling mechanism 34 includes a transverse moving frame 343, a second slider 344 and a second gear 347 are fixedly connected to the rear of the transverse moving frame 343, the transverse traveling mechanism 34 is connected to a second slide rail 345 through the second slider 344, the second gear 347 is engaged with the second rack 346, a second motor is arranged on the transverse moving frame 343, and an output end of the second motor is connected to the second gear 347. The transverse traveling mechanism 34 can drive the automatic welding gun to move left and right on the fixed beam 32 or the movable beam 33 along the length direction thereof through the second sliding block 344 and the second sliding rail 345 which are matched with each other, is suitable for the girder workpieces 4 with different sizes and widths of the workpieces, and can realize automatic distance adjustment through laser guidance.

The transverse moving frame 343 is provided with a welding wire bracket 314, a wire feeder 342 and a longitudinal travelling mechanism 35 capable of moving up and down, the longitudinal travelling mechanism 35 is provided with a powder outlet pipe 352, a powder suction pipe 351, a laser positioning probe 5 and a rotating mechanism 36, and a welding gun 6 is arranged below the rotating mechanism 36.

As shown in fig. 9-12, the welding gun 6 includes a heat dissipation device, the bottom of the heat dissipation device is connected with a conductive welding tip 61 through a thread, a welding wire hole is formed in the conductive welding tip 61, the heat dissipation device includes more than one heat dissipation block 62, a wire guide channel 66 is formed in the heat dissipation block 62, a heat dissipation fin 67 is formed on the heat dissipation block 62, in this embodiment, two heat dissipation blocks 62 are provided, an insulation plate 63 is arranged between the two heat dissipation blocks 62, one of the heat dissipation blocks 62 is provided with a thread hole, another heat dissipation block 62 is provided with a stepped hole, the two heat dissipation blocks 62 are fixedly connected with a bolt through an insulation sleeve 68, and the wire guide channel 66 is communicated with the. The top of the heat dissipation block 62 is provided with a threaded hole connected with the wire guide channel 66, a hollow bolt 64 is arranged in the threaded hole, and a wire feeding pipe 65 is arranged above the hollow bolt 64; during manufacturing, the heat dissipation block 62 is made of copper, so as to improve the heat conduction performance of the heat dissipation block 62.

The powder outlet pipe 352 and the powder suction pipe 351 are matched with the welding gun 6, the welding wire support 314 is used for placing a welding wire disc, and the welding wire on the welding wire disc passes through the wire feeder 342 and a wire feeding pipe 65 at the top of the welding gun 6, enters a wire guide channel 66 in the heat dissipation block 62 and finally passes through a welding wire hole of the conductive welding nozzle 1. The welding gun 6 continuously generates heat in the welding process, the heat is transferred to the radiating block 62, and auxiliary heat dissipation is carried out through the radiating block 62 and the radiating fins 67 on the radiating block 62, so that the temperature of the conductive welding tip 61 can quickly tend to be stable, the welding quality is improved, and the service life of the conductive welding tip 61 is prolonged.

Electric welding 37, welding powder storage vat 38 and auto sucking machine 39 are installed at main part walking frame 31 top, and electric welding 37's live wire and send a machine 342 to be connected, and the live wire is connected to welder 6 through sending a machine 342 one side wire, welds powder storage vat 38 and goes out powder pipe 352 and be connected, and auto sucking machine 39 is connected with auto sucking pipe 351. The welding machine 37, the suction machine 39 and the welding powder storage bin 38 are commercially available, and the installation manner is the prior art.

The longitudinal traveling mechanism 35 comprises a longitudinal moving frame 353, a second telescopic mechanism 354, a third sliding block 355 and a third sliding rail 356 which are matched with each other are arranged behind the longitudinal moving frame 353, the third sliding block 355 is fixedly connected with the longitudinal moving frame 353, the third sliding rail 356 is fixedly connected with the transverse moving frame 343, one end of the second telescopic mechanism 354 is fixedly connected with the transverse moving frame 343, the other end of the second telescopic mechanism 354 is connected with the longitudinal moving frame 353, the second telescopic mechanism 354 is connected with a servo motor, and the servo motor is arranged in a support behind the wire feeder 342. The longitudinal travelling mechanism 35 can drive the welding gun 6 to longitudinally move up and down, and the height of the welding gun 6 can be automatically adjusted according to the different thicknesses of the girder workpiece 4, so that the welding gun is suitable for girders of various models.

An adjusting plate 357 is further arranged on the longitudinal moving frame 353, a long hole 358 is arranged on the adjusting plate 357, supports are respectively arranged on the powder outlet pipe 352 and the powder suction pipe 351, the supports of the powder outlet pipe 352 and the powder suction pipe 351 are fixed on the adjusting plate 357 through the long hole 358, and an elastic device 359 is arranged on the adjusting plate 357 and the supports. The elastic device 359 strains the powder outlet pipe 352 and the powder suction pipe 351 tightly, so that the powder outlet pipe 352 and the powder suction pipe 351 are tightly attached to the vertical surface side of the girder workpiece, welding powder is uniformly scattered on a welding seam at the joint of the girder vertical panel and the plane plate by the powder outlet pipe 352, and after the welding of the welding gun 6 is completed, the powder suction pipe 351 sucks and recovers the residual welding powder after the welding is completed, so that the residual welding powder can be reused.

The rotating mechanism 36 comprises a rotating fixing frame 365, the rotating fixing frame 365 is fixedly connected with the longitudinal moving frame 353, a micro motor, a fixing cylinder 362 and a rotating rod 363 which are matched through threads are arranged on the rotating fixing frame 365, the fixing cylinder 362 is connected with the rotating fixing frame 365, a synchronizing wheel 364 is arranged at the upper part of the rotating rod 363, a gear three 366 is arranged at the output end of the micro motor, the gear three 366 is connected with the synchronizing wheel 364 through a synchronous belt, and the tail part of the rotating rod 363 is connected with the welding gun 6. The rotating mechanism 36 drives the welding gun 6 to rotate and finely adjust, so that the welding gun 6 is more attached to the gooseneck turning part of the girder workpiece 4.

A girder turnover mechanism 2 matched with the automatic welding device 3 is arranged below the automatic welding device 3, the girder turnover mechanism 2 is fixedly installed on a tooling frame 1, as shown in fig. 4 to 6, the girder turnover mechanism 2 comprises a turnover rack 203, a girder baffle 208 and a beam pushing mechanism 209 matched with the girder baffle 208 are arranged on the turnover rack 203, a movable middle plate 210 capable of moving up and down is arranged below the turnover rack 203, a main lifting mechanism 201 is arranged below the movable middle plate 210, a turnover plate 206 and a first telescopic mechanism 205 are hinged to the movable middle plate 210, and the turnover plate 206 is hinged to an extending end of the first telescopic mechanism 205; the bottom of the overturning rack 203 is provided with a guide post 202, and the guide post 202 penetrates through the movable middle plate 210; a pushing cylinder 204 corresponding to the girder baffle plate 208 is arranged on the overturning stand 203; the bottom of the overturning stand 203 is provided with a buffer cylinder 207 matched with a girder baffle 208.

When the girder turnover mechanism 2 is manufactured, four guide columns 202 are provided, and the four guide columns 202 are respectively arranged at four corners of the bottom of the turnover rack 203; the beam pushing mechanism 209, the main lifting mechanism 201, and the first telescoping mechanism 205 may be an air cylinder, an oil cylinder, a gear-rack structure driven by a motor, or a worm-and-gear structure, and the air cylinder is taken as an example in this embodiment for description. When installed, the main lift mechanism 201 is secured to the base plate 211 of the roll-over stand 203.

Example two: the supporting beam is provided with a second track 331, the bottom of the movable beam 33 is provided with a sliding plate, the main body walking frame 31 is fixedly connected with an electric telescopic rod, and the extending end of the electric telescopic rod is connected with the bottom of the movable beam 33; the rest is the same as the first embodiment. The electric telescopic rod drives the movable beam 33 to move back and forth.

Example three: a first rail 311 is arranged below the main body walking frame 31, a first rack is arranged on the first rail 311, a first motor 313 is arranged at the bottom of the main body walking frame 31, a first gear is arranged at the output end of the first motor 313, and the first gear is meshed with the first rack; the rest is the same as the first embodiment. The first motor 313 drives the main body traveling frame 31 to move forward and backward by a first gear and a rack which are engaged with each other.

As shown in fig. 2, two girder workpieces 4 are respectively placed on the tool frame 1, the girder workpieces 4 are positioned between the pushing cylinder 204 and the turnover plate 206 of the girder turnover mechanism 2, and the positions of the girder workpieces 4 are adjusted by the rollers 11, so that the girder workpieces 4 are on a horizontal line.

When the utility model is manufactured, the main body walking frame 31 is also provided with a distribution box, an operation panel and a PLC control module, and the first motor 313, the second motor, the micro motor, the small motor 335, the servo motor, the electric welding machine 37 and the material suction machine 39 are respectively electrically connected with the distribution box; and each air cylinder on the girder turnover mechanism 2 is connected with an electromagnetic pneumatic valve, and the distribution box and the electromagnetic pneumatic valve pass through a PLC control module.

The utility model discloses at the during operation, with the one end of automatic welder 3 location at girder work piece 4, then start the automatic program, girder shape parameter is caught automatically to laser positioning probe 5, then begins the welding procedure, and laser positioning probe 5 carries out the mode of walking, limit detection, limit calculation, and above-mentioned laser detection mode is prior art.

Treat that laser positioning probe 5 surveys girder work piece 4 and catches the back, carry out the automatic calculation, treat that the calculation is accomplished, PLC control the utility model discloses automatic start, this moment, automatic welder 3 drives welder 6 and carries out automatic weld, when reacing girder gooseneck turning, because girder work piece 4's both sides board R angle difference leads to the arc length different, small motor 335 automatic start, small motor 335 drives the walking beam 33 back-and-forth movement, carries out the front and back distance compensation to the longer one side of arc length, realizes the perfect linking of both sides board welded on girder work piece 4.

As shown in fig. 6, after the girder workpiece 4 is welded on one side, at this time, the piston rod of the push cylinder 204 for fixing the girder workpiece 4 is retracted, and after the girder workpiece 4 is pushed away from the position of the girder blocking plate 208 by the girder pushing mechanism 209, the piston rod of the girder pushing mechanism 209 is retracted. Then the main lifting mechanism 201 starts to act, the main lifting mechanism 201 pushes the movable middle plate 210 to move upwards along the guide post 202, the movable middle plate 210 drives the turnover plate 206 to ascend, the turnover plate 206 supports one side of the girder workpiece 4, so that the girder workpiece 4 is in an inclined position, then a piston rod of a first telescopic mechanism 205 extends out to push the turnover plate 206 upwards, thereby driving the girder workpiece 4 to be erected in a vertical state, at the moment, a girder pushing mechanism 209 acts to push the lower part of the girder workpiece 4 away from one side of a girder baffle plate 208, the buffer cylinder 207 rises, the piston rod of the first telescopic mechanism 205 retracts, the turnover plate 206 is brought back to the original position, the piston rod of the main lifting mechanism 201 retreats to drive the movable middle plate 210 to reset, at this time, after one side of the girder workpiece 4 is contacted with the buffer cylinder 207, the buffer cylinder 207 drives the girder workpiece 4 to slowly descend to the original position, namely the girder workpiece 4 is in a horizontal state, and the whole overturning process is completed.

Claims

1. The utility model provides a full-automatic welding machine of automotive frame, includes frock frame (1), its characterized in that: an automatic welding device (3) capable of moving back and forth along the length direction of the tool frame (1) is arranged above the tool frame (1), a movable beam (33) capable of moving back and forth along the length direction of the tool frame (1) is arranged on the automatic welding device (3), more than one group of automatic welding guns capable of moving left and right along the length direction of the movable beam (33) are arranged on the movable beam (33), a girder turnover mechanism (2) matched with the automatic welding device (3) is arranged below the automatic welding device (3), the girder turnover mechanism (2) comprises a turnover rack (203), a girder baffle (208) and a girder pushing mechanism (209) matched with the girder baffle (208) are arranged on the turnover rack (203), a movable middle plate (210) capable of moving up and down is arranged below the turnover rack (203), a main lifting mechanism (201) is arranged below the movable middle plate (210), and a turnover plate (206) and a first telescopic mechanism (205) are hinged on, the turnover plate (206) is hinged with the extending end of the first telescopic mechanism (205).

2. The full automatic welding machine for automotive beams according to claim 1, characterized in that: automatic welding set (3) are including main part walking frame (31), and main part walking frame (31) both sides are equipped with a supporting beam respectively, are equipped with second track (331) and four (332) of rack on the supporting beam, and walking beam (33) bottom is equipped with the slide, fixedly connected with small motor (335) on the slide, and the output of small motor (335) is equipped with four (333) complex gears with four (332) of rack, and the slide below is equipped with and moves about slider (334) with second track (331) complex.

3. The full automatic welding machine for automotive beams according to claim 2, characterized in that: the support beam is provided with a fixed beam (32) which is fixedly connected, and the fixed beam (32) is provided with more than one group of automatic welding guns which can move left and right along the length direction of the fixed beam (32).

4. A full automatic welding machine for automotive frames according to any one of claims 1 to 3, characterized in that: and a pushing cylinder (204) corresponding to the girder baffle (208) is arranged on the overturning rack (203).

5. The full automatic welding machine for automotive beams according to claim 4, characterized in that: the bottom of the overturning rack (203) is provided with a guide column (202), the guide column (202) penetrates through the movable middle plate (210), and the bottom of the overturning rack (203) is provided with a buffer cylinder (207) matched with a girder baffle (208).

6. The full automatic welding machine for automotive beams according to claim 1, characterized in that: the automatic welding gun comprises a transverse walking mechanism (34), wherein a wire feeder (342) and a longitudinal walking mechanism (35) capable of moving up and down are arranged on the transverse walking mechanism (34), a powder outlet pipe (352), a powder suction pipe (351), a laser positioning probe (5) and a rotating mechanism (36) are arranged on the longitudinal walking mechanism (35), a welding gun (6) is arranged below the rotating mechanism (36), and the welding gun (6) is matched with the wire feeder (342), the powder outlet pipe (352) and the powder suction pipe (351).

7. The full automatic welding machine for automotive beams according to claim 6, characterized in that: be equipped with regulating plate (357) on vertical running gear (35), be equipped with rectangular hole (358) on regulating plate (357), be equipped with the support on powder outlet pipe (352) and inhale powder pipe (351), on powder outlet pipe (352) and the support of inhaling powder pipe (351) all were fixed in regulating plate (357) through rectangular hole (358), regulating plate (357) with be equipped with resilient means (359) on the support.

8. The full automatic welding machine for automotive beams according to claim 6, characterized in that: the automatic welding device is characterized in that an electric welding machine (37), a welding powder storage barrel (38) and a suction machine (39) are arranged at the top of the automatic welding device (3), the electric welding machine (37) is matched with a wire feeding machine (342), the welding powder storage barrel (38) is connected with a powder outlet pipe (352), and the suction machine (39) is connected with a powder suction pipe (351).

9. The full automatic welding machine for automotive beams according to claim 6, characterized in that: welder (6) includes heat abstractor, and the heat abstractor bottom is equipped with electrically conductive welding nozzle (61), is equipped with the welding wire hole on electrically conductive welding nozzle (61), heat abstractor includes more than one radiating block (62), is equipped with radiating fin (67) on radiating block (62), is equipped with insulation board (63) between two radiating blocks (62), is equipped with seal wire passageway (66) in radiating block (62), and seal wire hole intercommunication on seal wire passageway (66) and the electrically conductive welding nozzle (61).