CN115519250A

CN115519250A - Laser welding machine with turnover structure and welding method

Info

Publication number: CN115519250A
Application number: CN202211408492.9A
Authority: CN
Inventors: 杨孬孬
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2022-12-27

Abstract

The invention relates to the technical field of laser welding, in particular to a laser welding machine with a turnover structure, which comprises a workbench, wherein the top of the workbench is fixedly connected with a welding machine base, the surface of the workbench is fixedly connected with a turnover motor through a bolt, an automatic turnover clamping device is arranged in the turnover clamping base clamped on an output shaft of the turnover motor, and the interior of the workbench is elastically connected with a welding bottom plate through a spring. According to the automatic overturning device, the overturning motor is used for controlling the clamped workpiece to automatically overturn, so that the problems of process increase, efficiency reduction and the like caused by manual overturning are solved, the automatic overturning device can achieve the effect of controlling the workpiece to automatically clamp and align the workpiece by utilizing the operation among structures in the automatic overturning clamping device, and can automatically remove clamping and loosen the workpiece after overturning welding, so that the efficiency of automatically clamping the workpiece during overturning is improved, time and labor are saved, and the effect of respectively performing wind power cleaning and cooling on two sides of the workpiece before and after welding is achieved.

Description

Laser welding machine with turnover structure and welding method

Technical Field

The invention relates to the technical field of laser welding, in particular to a laser welding machine with a turnover structure.

Background

At present along with the progress of science and technology, laser welding operation is carried out through laser-beam welding machine directly to partial work piece, thereby the people's both hands have been liberated, and simultaneously, laser-beam welding machine can realize higher welding precision, and have advantages such as faster welding efficiency, current laser-beam welding machine welds for the face that the weldment is different, for example front and back, then can place two weldments that need the welding together on same positioning jig earlier, after two weldments have welded openly, artificial whole positioning jig that overturns again, make laser-beam welding machine can carry out the laser welding operation to the back of two weldments.

The existing welding machine is limited by a bottom workbench, manual auxiliary turnover welding is needed when a workpiece with two sides welded works are operated, a workpiece re-clamping step and a turnover step are added, the whole processing time is prolonged, the welding position cannot be cleaned by the existing welding equipment when the welding equipment is used for welding, manual cleaning is needed, and the welding time is prolonged.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a laser welding machine with a turnover structure, which solves the problems in the background technology. In order to realize the purpose, the invention is realized by the following technical scheme: the utility model provides a laser welding machine with flip structure, includes the workstation, the top fixedly connected with welding frame of workstation, bolt fixedly connected with upset motor is passed through on the surface of workstation, the inside that the output shaft joint of upset motor has the upset holder is provided with automatic upset clamping device, there is welding bottom plate the inside of workstation through spring elastic connection.

Preferably, automatic upset clamping device is including the automatic cleaning device of centre gripping motor and welding seam, the inside of bolt fixed connection upset holder is passed through on the surface of centre gripping motor, the output shaft joint of centre gripping motor has the worm, the surface toothing of worm has the hollow worm wheel of cross, the inside sliding connection of the hollow worm wheel of cross has even axle fluted disc, the surface toothing of even axle fluted disc has the gear, the internal thread of gear is connected with the arm lock, the top of arm lock is provided with compresses tightly clamping device.

Preferably, the surface of the worm rotates to be connected with the inside of the overturning clamping seat, the surface of the cross hollow worm wheel rotates to be connected with the inside of the overturning clamping seat, the surface of the clamping arm is connected with the inner wall of the overturning clamping seat in a sliding manner, one side of the clamping arm, which is close to the gear, is fixedly connected with a threaded rod, and one end, far away from the clamping arm, of the gear rotates to be connected with the inside of the overturning clamping seat.

Preferably, compress tightly clamping device includes limiting base and unable adjustment base, limiting base's surface sliding connection arm lock's top, unable adjustment base's surface fixed connection arm lock's surface, limiting base is close to the one end sliding connection who links the axle fluted disc and has the slide axle, limiting base's bottom fixedly connected with splint, the bottom fixedly connected with clamp pad of splint.

Preferably, through spring elastic connection between the surface of spacing base and the top of arm lock, the fixed surface of spacing base is connected with elastic sealing silica gel cover, the top of the bottom fixed connection arm lock of elastic sealing silica gel cover, the logical groove of air current has been seted up to the inside of spacing base, jet-propelled logical groove has been seted up to the inside of splint, and the inner wall of the surperficial sliding connection arm lock of splint, the inside in logical groove of air current intercommunication jet-propelled logical groove's inside.

Preferably, the surface of the connecting shaft fluted disc is rotatably connected with the inside of the fixed base, and one end of the connecting shaft fluted disc, which is close to the limiting base, is fixedly connected with the end part of the sliding shaft.

Preferably, the automatic cleaning device for the welding seam comprises a pressing block, a cam and an air pressure box, the surface of the pressing block is connected with the inside of the overturning clamping seat in a sliding mode, the end portion of the pressing block is fixedly connected with an I-shaped connecting plate, the surface of the I-shaped connecting plate is elastically connected with the surface of the overturning clamping seat through a spring, and the surface of the cam is fixedly connected with the surface of the gear.

Preferably, the bottom of the air pressure box is fixedly connected with the top of the workbench, the inner wall of the air pressure box is connected with an air pressure plate in a sliding manner, one end of the air pressure plate is fixedly connected with a guide pillar, one end of the guide pillar, far away from the air pressure plate, is fixedly connected with a linkage plate, the surface of the guide pillar is connected with the inside of the air pressure box in a sliding manner, and the other end of the air pressure plate is elastically connected with the inside of the air pressure box through a spring.

Preferably, the inside in workstation has seted up the ventilation groove, the inside in ventilation groove communicates with the inside of welded floor and pneumatic tank respectively, the inner wall of welded floor's surperficial sliding connection workstation, the clearance groove has been seted up at the top of welded floor.

According to the technical scheme, the laser welding machine with the turnover structure provided by the embodiment of the specification at least has the following beneficial effects:

(1) According to the automatic overturning device, the overturning motor is used for controlling the clamped workpiece to automatically overturn, so that the problems of process increase, efficiency reduction and the like caused by manual overturning are avoided, the automatic overturning and clamping device achieves the effect of controlling the workpiece to automatically clamp and align the workpiece by utilizing the interaction among structures in the automatic overturning and clamping device, and automatically removes clamping and loosening processes after overturning and welding, so that the efficiency of automatically clamping the workpiece during overturning is improved, time and labor are saved, and the effects of respectively carrying out wind power cleaning and cooling on two sides of the workpiece before and after welding are achieved.

(2) According to the invention, the effects of automatically clamping, aligning and positioning a welding workpiece needing to be overturned and cleaning two sides are achieved by controlling the clamping motor and the components, the problems of process increase, efficiency reduction and the like caused by manual overturning are avoided, the effect of air flow circulation is achieved by the motion deformation of the elastic sealing silica gel sleeve, the air is sprayed to the surface of the clamping workpiece in an aligning way to achieve the effect of wind power cleaning, impurity and dust on the surface of the workpiece are cleaned before welding, the purpose of improving the welding effect is achieved, the purpose of wind power cleaning is achieved while clamping and aligning, and the welding efficiency is improved.

(3) According to the invention, the cam is driven by the gear to press the pressing block on the I-shaped connecting plate, the pressing block is used for pressing the linkage plate and the guide pillar is used for driving the air pressure plate to slide in the air pressure box, so that the effect of pushing and extruding the gas in the box is achieved, the air flow is aligned with the communication of the cleaning groove in the welding bottom plate and sprayed to the reverse side of the clamped workpiece, the effect of performing wind power cleaning on the reverse side of the workpiece to be welded is achieved, both sides of the workpiece are cleaned, the welding effect is prevented from being influenced by the residual impurity and dust, and meanwhile, the requirement of welding the two sides of the workpiece in a turned-over mode is met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a stage according to the present invention;

FIG. 3 is a schematic view of a clamping motor according to the present invention;

FIG. 4 is a schematic cross-sectional view of the flip holder of the present invention;

FIG. 5 is a schematic view of the structure of the clamp arm of the present invention;

FIG. 6 is a schematic cross-sectional view of a clamp arm according to the present invention;

FIG. 7 is a schematic cross-sectional view of a fixing base according to the present invention;

FIG. 8 is a schematic structural view of a coupling gear plate according to the present invention;

FIG. 9 is a schematic view of a pressing block according to the present invention;

FIG. 10 is a schematic structural view of an automatic cleaning device for a weld joint in the present invention.

In the figure: 1. a work table; 2. welding the base; 3. turning over a motor; 4. turning over the clamping seat; 5. an automated turnover clamping device; 51. a clamping motor; 52. a worm; 53. a cross hollow worm gear; 54. a connecting shaft fluted disc; 55. a gear; 56. clamping arms; 57. compressing the clamping device; 571. a limiting base; 572. a slide shaft; 573. a splint; 574. a clamping pad; 575. a fixed base; 576. elastic sealing silica gel; 577. an airflow through slot; 578. an air-injection through groove; 58. an automatic cleaning device for a welding seam; 581. pressing the block; 582. an I-shaped connecting plate; 583. a cam; 584. an air pressure box; 585. a gas pressure plate; 586. a guide post; 587. a linkage plate; 6. welding a bottom plate; 7. a ventilation slot; 8. and cleaning the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, the technical solution provided by the present invention is:

the utility model provides a laser-beam welding machine with flip structure, comprises a workbench 1, the top fixedly connected with welding frame 2 of workstation 1, the inside of welding frame 2 is provided with corresponding current welding assembly, including the welding head that can carry out horizontal longitudinal movement and adjust, be used for automatic mobile welding usefulness, the surface of workstation 1 passes through bolt fixedly connected with upset motor 3, a work piece for controlling after the centre gripping carries out automatic upset work, avoid the process that artifical manual upset caused to increase and efficiency reduction scheduling problem, the output shaft joint of upset motor 3 has the inside of upset holder 4 to be provided with automatic upset clamping device 5, automatic upset clamping device 5 is used for controlling the work piece and carries out automatic centre gripping and alignment process, and carry out automatic clip and loosen the process after the upset welding, improve the automation to the work piece during the upset, time saving and labor saving, the inside of workstation 1 has welding bottom plate 6 through spring elastic connection, elastic fixation's welding bottom plate 6 has the function of auxiliary stay to the work piece during centre gripping and centre gripping, the work piece can be forced and carry out the elasticity during the position of stepping down during the upset simultaneously, avoid it to the space restriction that the work piece caused.

In the embodiment, the automatic overturning and clamping device 5 comprises a clamping motor 51 and an automatic cleaning device 58 for a welding seam, the surface of the clamping motor 51 is fixedly connected with the inside of the overturning clamping seat 4 through a bolt, an output shaft of the clamping motor 51 is clamped with a worm 52, as shown in fig. 2 and fig. 3, the number of the worms 52 is two, and the two worms 52 are symmetrically distributed in the overturning clamping seat 4, the two worms 52 are transmitted through a belt, so that the effect of synchronous rotating motion of components related to the worms 52 is achieved, the clamping motor 51 is installed in the overturning clamping seat 4, a cross hollow worm wheel 53 is meshed on the surface of the worm 52, the surface of the cross hollow worm wheel 53 is rotatably connected with the inside of the overturning clamping seat 4, and the overturning clamping seat 4 can only carry out rotating motion by taking the shaft point of the output shaft of the overturning motor 3 as a circular point, the cross hollow worm wheel 53 is limited by rotation and can only rotate at a fixed point in the overturning clamp seat 4, a connecting shaft fluted disc 54 is connected in the cross hollow worm wheel 53 in a sliding manner, the surface of the connecting shaft fluted disc 54 is rotationally connected in the fixed base 575, one end of the connecting shaft fluted disc 54 close to the limiting base 571 is fixedly connected with the end part of the sliding shaft 572, the connecting shaft fluted disc 54 is formed by combining a fluted disc and a cross connecting shaft, the fluted disc slides in a limited manner in a groove in the cross hollow worm wheel 53 through the cross connecting shaft, the connecting shaft fluted disc 54 can slide and is simultaneously influenced by the cross hollow worm wheel 53 to rotate synchronously, the surface of the connecting shaft fluted disc 54 is engaged with a gear 55, a clamping arm 56 is connected in the gear 55 through threads, a threaded rod is fixedly connected to one side of the clamping arm 56 close to the gear 55 and is in threaded connection with the gear 55 through the threaded rod, and a pressing clamping device 57 is arranged at the top of the clamping arm 56; the surface of the worm 52 is rotatably connected with the inside of the overturning holder 4, the surface of the clamping arm 56 is slidably connected with the inner wall of the overturning holder 4 through a convex block, namely the clamping arm 56 can only slide linearly in the overturning holder 4, the limited clamping arm 56 can achieve the effect of linear motion through a threaded rod and a rotating gear 55, and one end of the gear 55, which is far away from the clamping arm 56, is rotatably connected with the inside of the overturning holder 4 and rotates at a fixed point in the gear 55; the pressing and clamping device 57 comprises a limiting base 571 and a fixing base 575, the surface of the limiting base 571 is slidably connected with the top of the clamping arm 56, the surface of the fixing base 575 is fixedly connected with the surface of the clamping arm 56, the fixing base 575 is used for fixing the connecting shaft fluted disc 54 to perform limiting rotation and driving the connecting shaft fluted disc to synchronously move along with the clamping arm 56, one end, close to the connecting shaft fluted disc 54, of the limiting base 571 is slidably connected with a sliding shaft 572, the bottom of the limiting base 571 is fixedly connected with a clamping plate 573, the bottom of the clamping plate 573 is fixedly connected with a clamping pad 574, the buffering performance during clamping of the clamping plate 573 and a workpiece is improved, the effect of flexible clamping is achieved, and the problem that the welding workpiece is damaged by rigid clamping is avoided;

two workpieces needing to be welded in an overturning manner are placed in clamping arms 56 in an overturning clamping seat 4 respectively, a clamping motor 51 is started after the workpieces are loaded, an output shaft of the clamping motor 51 drives a cross hollow worm wheel 53 to rotate through a worm 52, the cross hollow worm wheel 53 rotates to drive a fluted disc and a sliding shaft 572 thereof to rotate through a cross connecting shaft, and drives a meshed gear 55 to rotate through teeth on the fluted disc, the sliding shaft 572 drives a clamping pad 574 on the clamping plate 573 to move downwards through a limiting base 571 in end sliding connection when rotating, so that the effect of automatically clamping the workpieces in the clamping arms 56 downwards is achieved, meanwhile, the gear 55 drives the workpieces which are connected through a threaded rod and are limited by the clamping arms 56 to move by utilizing the principle of threaded connection when rotating, the two clamping arms 56 in the overturning clamping seat 4 move relatively close to achieve the effect of aligning the two clamped workpieces during the closing, and then the effects of clamping, aligning and positioning the workpieces needing to be welded in an overturning manner are met.

The surface of the limiting base 571 is elastically connected with the top of the clamping arm 56 through a spring, the surface of the limiting base 571 is fixedly connected with an elastic sealing silica gel sleeve 576, the elastic sealing silica gel sleeve 576 is used for sealing a space between the limiting base 571 and the clamping arm 56, meanwhile, the silica gel material has the functions of deformation and elastic reset, so that the purposes of sealing and ensuring the space extrusion of the elastic sealing silica gel sleeve 571 along with the limiting base 571 are achieved, the space extrusion force after forced movement is used for driving the circulation of internal air, the bottom of the elastic sealing silica gel sleeve 576 is fixedly connected with the top of the clamping arm 56, an air flow through groove 577 is formed in the limiting base 571, an air injection through groove 578 is formed in the clamping plate 573, the surface of the clamping plate 573 is slidably connected with the inner wall of the clamping arm 56, the inside of the air injection through groove 577 is communicated with the inside of the air injection through groove 577, the air generated when the elastic sealing silica gel sleeve 576 deforms is extruded to circulate to the inside of the air injection through the air flow through groove 577, a plurality of nozzles are formed in one side of the air injection through the nozzles, the air injection through which the nozzles are aligned and sprayed to the surface of the clamping workpiece, the surface of the workpiece is further, the air injection through nozzles, the purposes of cleaning dust before welding, the cleaning effect of the clamping workpiece 578 is achieved, and the purpose of aligning and the cleaning effect of the clamping workpiece is improved before the welding.

The automatic cleaning device 58 for the welding seam comprises a pressing block 581, a cam 583 and an air pressure box 584, wherein the surface of the pressing block 581 is connected with the inside of the overturning clamp seat 4 in a sliding manner, the end part of the pressing block 581 is fixedly connected with a H-shaped connecting plate 582, the H-shaped connecting plate 582 is formed by combining a rod in the middle and square plates at two sides and is used as a connecting piece of the pressing block 581, the surface of the H-shaped connecting plate 582 is elastically connected with the surface of the overturning clamp seat 4 through a spring, the surface of the cam 583 is fixedly connected with the surface of the gear 55, the cam 583 is driven to rotate when the gear 55 rotates, the surface of the cam 583 is in movable contact with the surface of the H-shaped connecting plate 582, and when the cam 583 is in contact with the surface of the H-shaped connecting plate 582 during rotation and achieves the effect of pressing the cam, and then the pressing block is driven to move in the overturning clamp seat 581; the bottom of the air pressure box 584 is fixedly connected with the top of the workbench 1, the inner wall of the air pressure box 584 is connected with an air pressure plate 585 in a sliding mode, one end of the air pressure plate 585 is fixedly connected with a guide pillar 586, one end, far away from the air pressure plate 585, of the guide pillar 586 is fixedly connected with a linkage plate 587, when the pressing block 581 moves, the linkage plate 587 contacts with the linkage plate 587 and presses the linkage plate, the linkage plate 587 drives the air pressure plate 585 to slide in the air pressure box 584 through the guide pillar 586, the air pressure plate 585 pushes and extrudes gas in the box during sliding, the effect of promoting gas flow circulation is achieved, gas flow enters the inside of the ventilation groove 7 through a groove formed in the bottom of the air pressure box 584, the gas flow is accurately sprayed to the surface of a workpiece clamped on the bottom plate through a cleaning groove 8 in the welding bottom plate 6, the effect of wind power cleaning on the turned surfaces needing to be welded of the workpiece is achieved, both sides of the workpiece is cleaned, the residual impurities and dust is prevented from influencing the welding effect, meanwhile, the requirement of the two-sided turning welding of the workpiece is met, the surface of the workpiece, the surface of the guide pillar is connected with the inside of the air pressure box 584 in a spring, and the other end of the air pressure plate 585 is elastically connected with the inside of the air pressure box 584 through a spring 586; ventilating groove 7 has been seted up to workstation 1's inside, ventilating groove 7's inside respectively with welded baseplate 6 and atmospheric pressure case 584 inside intercommunication, welded baseplate 6's surface sliding connection workstation 1's inner wall, and clearance groove 8 has been seted up at welded baseplate 6's top.

The effects of automatic clamping, alignment and two-side cleaning of a workpiece to be welded in a required overturning mode are achieved by controlling the operation of the clamping motor 51, the problems of process increase, efficiency reduction and the like caused by manual overturning are avoided, welding work is carried out on the front side of the workpiece to be welded by starting the welding machine base 2 after work is finished, the operation of the overturning motor 3 is controlled after front side welding is finished, the overturning clamp base 4 is driven by an output shaft to integrally overturn with the workpiece to be clamped therein, the welding base plate 6 which is elastically fixed during overturning is pressed to give way, the workpiece is reset by elastic force after overturning, the workpiece after subsequent welding is subjected to bottom auxiliary supporting after resetting, the welding machine base 2 is controlled again to carry out laser welding on the overturning surface of the workpiece after overturning, clamping and positioning of the workpiece are cancelled by controlling the clamping motor 51 after welding is finished, and auxiliary cooling is carried out on the surface of the welded workpiece by utilizing reversely-circulating gas, and the efficiency and function of the whole laser welding work are improved.

When the laser welding machine with the turnover structure is used, two workpieces to be turned and welded are respectively placed in clamping arms 56 in a turnover clamping seat 4, a clamping motor 51 is started after feeding, an output shaft of the clamping motor 51 drives a cross hollow worm wheel 53 to rotate through a worm 52, the cross hollow worm wheel 53 rotates to drive a fluted disc and an upper sliding shaft 572 thereof to rotate through a cross connecting shaft, and drives a meshed gear 55 to rotate through teeth on the fluted disc, the sliding shaft 572 drives an upper clamping pad 574 of a clamping plate 573 to move downwards through a limiting base 571 in sliding connection with the end part when rotating, so that the effect of automatically clamping the workpieces in the clamping arms 56 downwards is achieved, meanwhile, the gear 55 drives the inner part to be connected through a threaded rod and move through the limiting clamping arms 56, the two clamping arms 56 in the turnover clamping seat 4 move relatively close to achieve the effect of aligning the two clamped workpieces during close, and the effect of clamping, aligning and positioning the required turnover welded workpieces are further met; meanwhile, when the limiting base 571 drives the elastic sealing silica gel sleeve 576 to deform during downward clamping, gas generated by deformation flows into the air injection through groove 578 through the air flow through groove 577 after being extruded, and is sprayed to the surface of a clamped workpiece through the nozzle in an aligned manner, so that the effect of wind power cleaning is further achieved, impurity and dust on the surface of the workpiece are cleaned before welding, the purpose of improving the welding effect is achieved, and the purpose of wind power cleaning is achieved while clamping and aligning; when the gear 55 rotates, the cam 583 is driven to rotate, the surface of the cam 583 is in movable contact with the surface of the I-shaped connecting plate 582, when the cam 583 is in contact with the surface of the I-shaped connecting plate 582 during rotation and achieves the effect of pressing the I-shaped connecting plate, the pressing block 581 is driven to move in the overturning holder 4, the pressing block 581 is in contact with and presses the linkage plate 587 when moving, the linkage plate 587 drives the air pressure plate 585 to slide in the air pressure box 584 through the guide post 586, the air pressure plate 585 pushes and extrudes gas in the box during sliding, the effect of promoting air flow circulation is achieved, air flow enters the ventilation groove 7 through the groove formed in the bottom of the air pressure box 584, and is sprayed to the surface of a workpiece clamped on the bottom plate by utilizing the cleaning groove 8 in the welding bottom plate 6, the effect of performing wind power cleaning on the overturned surface of the workpiece needing to be welded is achieved, both surfaces of the workpiece are cleaned, the effect of avoiding influence of residual impurity dust on the welding effect, and the requirement of welding of overturning the two surfaces of the workpiece is met; the automatic clamping, aligning and positioning and double-side cleaning effects of a welding workpiece needing to be overturned are achieved by controlling the operation of the clamping motor 51, the problems of process increase, efficiency reduction and the like caused by manual overturning are solved, the welding operation of the front side of the clamping workpiece is achieved by starting the welding machine base 2 after the operation is finished, the operation of the overturning motor 3 is controlled after the front side welding is finished, the overturning clamp base 4 is driven by an output shaft to integrally overturn with the clamping workpiece inside, the welding bottom plate 6 which is elastically fixed during overturning is pressed and abducted, and is reset through elasticity after the workpiece is overturned, the auxiliary support of the bottom of the workpiece after the subsequent welding is finished after resetting is carried out, the welding machine base 2 is controlled again to carry out laser welding on the overturned surface of the workpiece after the workpiece is overturned, the clamping positioning of the workpiece is cancelled through controlling the clamping motor 51 after the welding is finished, the auxiliary cooling is carried out on the surface of the workpiece after the welding by utilizing the gas which reversely circulates, and the efficiency and the function of the whole laser welding operation are improved.

The above embodiments are only for illustrating the embodiments of the present invention and not for limiting the embodiments of the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention, so that all equivalent technical solutions also belong to the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.

Claims

1. A laser welding machine with a turnover structure comprises a workbench (1), and is characterized in that: the top fixedly connected with welding frame (2) of workstation (1), bolt fixedly connected with upset motor (3) are passed through on the surface of workstation (1), the inside that the output shaft joint of upset motor (3) has upset holder (4) is provided with automatic upset clamping device (5), there is welding bottom plate (6) inside of workstation (1) through spring elastic connection.

2. The laser welding machine with the turnover structure as claimed in claim 1, wherein: automatic change upset clamping device (5) including centre gripping motor (51) and the automatic cleaning device (58) of welding seam, the inside of bolt fixed connection upset holder (4) is passed through on the surface of centre gripping motor (51), the output shaft joint of centre gripping motor (51) has worm (52), the surface meshing of worm (52) has cross hollow worm wheel (53), the inside sliding connection of cross hollow worm wheel (53) has even axle fluted disc (54), the surface meshing of even axle fluted disc (54) has gear (55), the internal thread connection of gear (55) has arm lock (56), the top of arm lock (56) is provided with compresses tightly clamping device (57).

3. The laser welding machine with the flip structure according to claim 2, wherein: the surface of worm (52) rotates the inside of connecting upset holder (4), the surface of cross hollow worm wheel (53) rotates the inside of connecting upset holder (4), the inner wall of surperficial sliding connection upset holder (4) of arm lock (56), one side fixedly connected with threaded rod that arm lock (56) are close to gear (55), the one end that arm lock (56) were kept away from in gear (55) rotates the inside of connecting upset holder (4).

4. The laser welding machine with the turnover structure as set forth in claim 2, wherein: the pressing and clamping device (57) comprises a limiting base (571) and a fixing base (575), the surface of the limiting base (571) is connected with the top of the clamping arm (56) in a sliding mode, the surface of the fixing base (575) is fixedly connected with the surface of the clamping arm (56), one end, close to the axle connecting fluted disc (54), of the limiting base (571) is connected with a sliding shaft (572) in a sliding mode, the bottom of the limiting base (571) is fixedly connected with a clamping plate (573), and the bottom of the clamping plate (573) is fixedly connected with a clamping pad (574).

5. The laser welding machine with the overturning structure according to claim 4, characterized in that: the surface of the limiting base (571) is elastically connected with the top of the clamping arm (56) through a spring, the surface of the limiting base (571) is fixedly connected with an elastic sealing silica gel sleeve (576), the bottom of the elastic sealing silica gel sleeve (576) is fixedly connected with the top of the clamping arm (56), an air flow through groove (577) is formed in the limiting base (571), an air injection through groove (578) is formed in the clamping plate (573), the surface of the clamping plate (573) is slidably connected with the inner wall of the clamping arm (56), and the inside of the air flow through groove (577) is communicated with the inside of the air injection through groove (578).

6. The laser welding machine with the turnover structure as set forth in claim 2, wherein: the surface of the connecting shaft fluted disc (54) is rotatably connected with the inside of the fixed base (575), and one end of the connecting shaft fluted disc (54) close to the limiting base (571) is fixedly connected with the end part of the sliding shaft (572).

7. The laser welding machine with the turnover structure as set forth in claim 2, wherein: the automatic cleaning device (58) for the welding seam comprises a pressing block (581), a cam (583) and an air pressure box (584), wherein the surface of the pressing block (581) is connected with the inside of an overturning clamping seat (4) in a sliding manner, the end part of the pressing block (581) is fixedly connected with an I-shaped connecting plate (582), the surface of the I-shaped connecting plate (582) is elastically connected with the surface of the overturning clamping seat (4) through a spring, and the surface of the cam (583) is fixedly connected with the surface of a gear (55).

8. The laser welding machine with the turnover structure as set forth in claim 7, wherein: the top of bottom fixed connection workstation (1) of atmospheric pressure case (584), the inner wall sliding connection of atmospheric pressure case (584) has atmospheric pressure board (585), the one end fixedly connected with guide pillar (586) of atmospheric pressure board (585), the one end fixedly connected with interlock board (587) of atmospheric pressure board (585) are kept away from in guide pillar (586), and the inside of the surface sliding connection atmospheric pressure case (584) of guide pillar (586), the inside of spring elastic connection atmospheric pressure case (584) is passed through to the other end of atmospheric pressure board (585).

9. The laser welding machine with the overturning structure according to claim 1, characterized in that: ventilating groove (7) have been seted up to the inside of workstation (1), the inside in ventilating groove (7) communicates with the inside of welded bottom plate (6) and pneumatic box (584) respectively, the inner wall of the surperficial sliding connection workstation (1) of welded bottom plate (6), clearance groove (8) have been seted up at the top of welded bottom plate (6).

10. A welding method of a laser welder having a flip structure according to any one of claims 1 to 9, characterized in that: two workpieces needing to be welded in a turnover mode are respectively placed in clamping arms (56) in a turnover clamping seat (4), a clamping motor (51) is started after feeding, an output shaft of the clamping motor (51) drives a cross hollow worm wheel (53) to rotate through a worm (52), the cross hollow worm wheel (53) drives a fluted disc to rotate with a sliding shaft (572) on the fluted disc through a cross connecting shaft, and drives a meshed gear (55) to rotate through teeth on the fluted disc, the sliding shaft (572) drives a clamping pad (574) on a clamping plate (573) to move downwards through a limiting base (571) with sliding connection at the end part when rotating, the gear (55) drives the clamping arms (56) which are connected through a threaded rod and limited to move by the inner part through the inner part by using the principle of threaded connection, the two clamping arms (56) in the turnover clamping seat (4) carry out relative approaching movement, the two clamping workpieces are aligned during approaching, meanwhile, when the limiting base (571) drives an elastic sealing silica gel sleeve (576) to deform during downward clamping, gas generated after extrusion flows to a through an airflow through groove (7) and flows to the inner part of a movable through a surface (573) of a movable connecting plate, when the cam (578) of the movable connecting plate rotates, the cam (582) presses the surface of a cam (583) and the movable connecting plate, and the cam (582) contacts with the surface of the movable connecting plate (582) when the cam (55) rotates, then the pressing block (581) is driven to move in the overturning holder (4), the pressing block (581) contacts and presses the linkage plate (587) when moving, the linkage plate (587) drives the air pressure plate (585) to slide in the air pressure box (584) through the guide post (586), the air pressure plate (585) pushes and extrudes the air in the box during sliding, the air flow enters the ventilation groove (7) through the groove arranged at the bottom of the air pressure box (584), and the cleaning groove (8) inside the welding bottom plate (6) is aligned and sprayed to the surface of the workpiece clamped on the bottom plate, cleaning both sides of the workpiece, automatically clamping, aligning and positioning the workpiece to be turned over and cleaned both sides by controlling the operation of a clamping motor (51), after the work is finished, the welding machine base (2) is started to weld the front surface of the clamping workpiece, the turning motor (3) is controlled to operate after the front surface welding is finished, the output shaft is utilized to drive the turning clamping base (4) to integrally turn over the clamping workpiece inside the turning clamping base, the welding bottom plate (6) which is elastically fixed during the overturning period is pressed and abducted, and the workpiece is reset through the elasticity after being overturned, and after the resetting, the bottom auxiliary support is carried out on the workpiece after the subsequent welding is finished, the welding machine base (2) is controlled again to carry out laser welding on the turned surface of the workpiece after the workpiece is turned over, the clamping and positioning of the workpiece are cancelled by controlling the clamping motor (51) after the welding is finished, and the auxiliary cooling is carried out on the surface of the welded workpiece by utilizing the reversely circulated gas.