Frame welding device

Abstract

The invention relates to the technical field of welding devices, in particular to a frame welding device which comprises a laser welding head, a protection mechanism for protecting the laser welding head when the laser welding head is not used, a purification mechanism for purifying welding fume generated during welding, and a cooling mechanism for cooling the laser welding head in the using process. The purification mechanism comprises a treatment box, a gas collection cylinder fixedly installed in the treatment box and a sliding piece installed in the gas collection cylinder in a sliding mode. According to the welding fume purification device, through the arrangement of the purification mechanism, welding fume is intermittently conveyed into a treatment solution, the problem that the treatment solution is insufficiently treated due to the fact that the amount of conveyed welding fume is too large is solved, the purification effect is improved, the treatment solution is stirred, the welding fume makes full contact and react in the treatment solution, and the purification effect is further improved; and the purified gas is discharged to the welding seam, so that the welding seam is cooled.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a vehicle frame welding device. Background Art

[0002] Welding devices are an indispensable part of the welding process. They provide the necessary energy (such as electrical energy, heat energy, light energy, etc.) and physical conditions (such as pressure, temperature, etc.) to melt and connect two or more metal parts at high temperatures. According to different welding methods and application scenarios, welding devices can be divided into many types, such as arc welding devices, resistance welding devices, laser welding devices, ultrasonic welding devices, etc.

[0003] As an important component of a vehicle, the frame is usually welded from steel or aluminum square tubes.

[0004] A Chinese patent with application number CN202111645662.0 discloses a splicing device for an aluminum alloy frame, including a splicing platform, a support seat, a clamping unit and a cleaning unit; the cleaning unit includes a shell, a cleaning motor, a connecting rod, a ring plate and a fan blade; the components of the frame are clamped and fixed by the clamping unit, and the welding machine welds the components into a frame. The welding shavings generated during welding fall to the top surface of the splicing platform, and the cleaning motor drives the connecting rod to rotate, which drives the fan blades to rotate, and the air outside the shell is sucked into the shell from the air inlet, generating high-speed flowing wind, which is ejected from the air outlet to blow away the welding shavings on the top surface of the splicing platform, thereby improving the cleanliness of the splicing device, reducing the probability of the frame surface being contaminated with welding shavings, and improving the processing quality of the frame.

[0005] However, the frame welding device generates welding smoke during welding, and the device in the above patent cannot absorb and process the welding smoke, which is easy to cause harm to the human body.

[0006] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a frame welding device which can effectively solve the above technical problems.

[0008] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0009] A vehicle frame welding device, comprising: a laser welding head, a protection mechanism for protecting the laser welding head when not in use, a purification mechanism for purifying welding fumes generated during welding, and a cooling mechanism for cooling the laser welding head during use;

[0010] The purification mechanism comprises: a processing box, a gas collecting cylinder fixedly installed in the processing box, a sliding member slidably installed in the gas collecting cylinder, an air intake assembly for conveying welding smoke into the gas collecting cylinder, a gas collecting shell connected to the gas collecting cylinder, a gas outlet head connected to the gas collecting shell, a linkage assembly for driving the gas collecting shell to swing, and an exhaust assembly for discharging the purified welding smoke;

[0011] The linkage assembly comprises: a rack fixedly connected to the sliding member, and a gear meshingly connected to the rack; the gear is rotatably installed in the processing box, and the gas collecting shell is coaxially connected to the gear;

[0012] The sliding member comprises: a piston slidably mounted in the gas collecting cylinder, a movable frame fixedly connected to the piston, and a linkage spring driving the piston to return to its original position;

[0013] The exhaust assembly includes: a fan connected to the processing box, an exhaust pipe connected to the fan, and an exhaust head connected to the exhaust pipe.

[0014] Furthermore, the air intake assembly includes: a connecting pipe, an annular pipe connected to the connecting pipe, and a pump body connected to the annular pipe; the pump body is connected to the air collecting cylinder.

[0015] Furthermore, the protection mechanism includes: a protection shell, a protection plate slidably mounted on the protection shell, a guide component for guiding the protection plate, and a moving component for driving the laser welding head to move.

[0016] Furthermore, the guide assembly includes: a fixed shell fixedly mounted on the protective shell, a movable plate movably mounted in the fixed shell, and a reset member driving the protective plate to reset; the movable plate is fixedly connected to the protective plate.

[0017] Furthermore, the reset member includes: a slider fixedly mounted on the movable plate, a fixed rod for guiding the slider when it moves, and a reset spring for driving the protective plate to reset; a slide groove is provided in the fixed shell, and the slider is slidably mounted in the slide groove.

[0018] Furthermore, the moving assembly includes: a mounting plate fixedly connected to the laser welding head, a power source for driving the mounting plate to move, a limiting member for limiting the position of the mounting plate when it moves, and a round tube fixedly mounted on the mounting plate.

[0019] Furthermore, the limiting member includes: a limiting block fixedly installed on the mounting plate, and a limiting strip fixedly installed in the protective box; the limiting block is slidably installed on the limiting strip.

[0020] Furthermore, the cooling mechanism includes: a water bag fixedly installed between the piston and the air collecting cylinder, a cooling pipe respectively connecting the water bag and the processing box, and a fin fixedly mounted on the cooling pipe; the water bag is connected to the processing box.

[0021] Furthermore, it also includes: a dust removal mechanism for removing dust from the laser welding head before use;

[0022] The dust removal mechanism comprises: an air bag fixedly installed between the fixed shell and the movable plate, and an air guide pipe connecting the air bag and the annular pipe.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a vehicle frame welding device, which realizes intermittent delivery of welding smoke into a treatment solution through the setting of a purification mechanism, thereby avoiding the problem of insufficient treatment of the treatment solution caused by excessive amount of welding smoke delivered, improving the purification effect, and stirring the treatment solution to allow the welding smoke to fully contact and react in the treatment solution, further improving the purification effect; and discharging the purified gas to the weld seam, which has a cooling effect on the weld seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 It is a cross-sectional schematic diagram of a component protection shell of a vehicle frame welding device of the present invention;

[0027] Figure 2 It is a three-dimensional schematic diagram of a vehicle frame welding device of the present invention;

[0028] Figure 3 It is a three-dimensional schematic diagram of a component protection shell of a vehicle frame welding device of the present invention;

[0029] Figure 4 It is a cross-sectional schematic diagram of a component processing box of a vehicle frame welding device of the present invention;

[0030] Figure 5 It is a cross-sectional schematic diagram of a component fixing shell of a vehicle frame welding device of the present invention;

[0031] Figure 6 A frame welding device of the present invention Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 A schematic cross-sectional view of a gas collecting cylinder as a component of a vehicle frame welding device according to the present invention;

[0033] Figure 8It is a three-dimensional schematic diagram of a gas collecting shell component of a vehicle frame welding device of the present invention;

[0034] Fig. 9 A frame welding device of the present invention Figure 8 Enlarged view of point B in the middle.

[0035] In the figure:

[0036] 1. Machine; 2. Robot; 3. Laser welding head; 4. Protection mechanism; 41. Protection shell; 42. Protection plate; 43. Guide assembly; 431. Fixed shell; 432. Movable plate; 433. Reset member; 4331. Slider; 4332. Fixed rod; 4333. Reset spring; 44. Moving assembly; 441. Power source; 442. Mounting plate; 443. Round tube; 444. Limiting member; 4441. Limiting block; 4442. Limiting strip; 5. Purification mechanism; 51. Processing box; 52. Gas collecting cylinder; 53. Sliding member; 531 , piston; 532, movable frame; 533, linkage spring; 54, air intake assembly; 541, pump body; 542, annular tube; 543, connecting tube; 544, air intake pipe; 55, air collecting shell; 56, air outlet head; 57, air outlet pipe; 58, linkage assembly; 581, rack; 582, gear; 59, exhaust assembly; 591, fan; 592, exhaust pipe; 593, exhaust head; 6, cooling mechanism; 61, water bag; 62, cooling pipe; 63, fin; 64, liquid inlet pipe; 7, dust removal mechanism; 71, air bag; 72, air guide pipe. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0038] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] like Figures 1 to 9 As shown, a vehicle frame welding device of the present invention includes: a machine platform 1, a robot 2 fixedly mounted on the machine platform 1, a laser welding head 3, a protection mechanism 4 for protecting the laser welding head 3 when not in use, a purification mechanism 5 for purifying welding fumes generated during welding, and a cooling mechanism 6 for cooling the laser welding head 3 during use.

[0040] During welding, the vehicle frame can be placed on the machine platform 1, and the movement of the laser welding head 3 can be controlled by the robot 2, so as to realize the welding of the vehicle frame.

[0041] The purification mechanism 5 includes: a treatment box 51 fixedly mounted on the protective shell 41, a partition is arranged inside the treatment box 51, so that the treatment box 51 is divided into a treatment chamber and a cooling chamber, the treatment chamber stores a treatment solution for treating welding smoke, the cooling chamber stores a cooling medium, a gas collecting cylinder 52 fixedly mounted in the treatment box 51, a sliding member 53 slidably mounted in the gas collecting cylinder 52, an air intake assembly 54 for conveying welding smoke to the gas collecting cylinder 52, a gas collecting shell 55 connected to the gas collecting cylinder 52, the gas collecting cylinder 52 and the gas collecting shell 55 are connected through an air outlet pipe 57, an air outlet head 56 connected to the gas collecting shell 55, a linkage assembly 58 for driving the gas collecting shell 55 to swing, and an exhaust gas for discharging the purified welding smoke. Component 59; the sliding member 53 includes: a piston 531 slidably installed in the air collecting cylinder 52, a movable frame 532 fixedly connected to the piston 531, and a linkage spring 533 for driving the piston 531 to return to its original position, one end of the linkage spring 533 is fixedly connected to the piston 531, and the other end of the linkage spring 533 is fixedly connected to the inner wall of the air collecting cylinder 52; the air intake component 54 includes: a connecting pipe 543 connected to the circular pipe 443, an annular pipe 542 connected to the connecting pipe 543, the annular pipe 542 is fixedly connected to the mounting plate 442, and a pump body 541 connected to the annular pipe 542, the annular pipe 542 is connected to the pump body 541 through the air intake pipe 544; the pump body 541 is connected to the air collecting cylinder 52.

[0042] When the laser welding head 3 is started, the purification mechanism 5 is operated, that is, by starting the pump body 541, the welding smoke generated by the laser welding head 3 during welding passes through the circular tube 443, the connecting tube 543, the annular tube 542, and the air inlet pipe 544 in sequence, and then enters the gas collecting cylinder 52. As the welding smoke is continuously transported into the gas collecting cylinder 52, the air pressure in the gas collecting cylinder 52 increases, which can drive the piston 531 to slide downward in the gas collecting cylinder 52. When the piston 531 moves to below the air inlet end of the air outlet pipe 57, the welding smoke in the gas collecting cylinder 52 is quickly discharged through the air outlet pipe 57, enters the gas collecting shell 55, and enters the treatment solution through the air outlet head 56, and the welding smoke is purified by the treatment solution.

[0043] When the piston 531 slides downward in the gas collecting cylinder 52, it drives the movable frame 532 to move, and then drives the linkage spring 533 to compress. When the piston 531 moves to below the air inlet end of the outlet pipe 57, the welding smoke in the gas collecting cylinder 52 is quickly discharged through the outlet pipe 57. At this time, the air pressure in the gas collecting cylinder 52 is reduced, and the elastic force of the linkage spring 533 can drive the piston 531 to reset upward; the above process is repeated.

[0044] By reciprocating the piston 531 up and down, welding smoke is intermittently delivered to the treatment solution, ensuring sufficient contact and reaction of the welding smoke in the treatment solution, thereby improving the purification effect and avoiding the problem of insufficient treatment of the treatment solution due to excessive amount of welding smoke delivered.

[0045] The linkage assembly 58 includes: a rack 581 fixedly connected to the sliding member 53, and a gear 582 meshingly connected to the rack 581; the gear 582 is rotatably installed in the processing box 51, and the gas collecting shell 55 is coaxially connected to the gear 582.

[0046] As the piston 531 is acted upon by the air pressure, it reciprocates up and down. When the piston 531 moves downward, it drives the movable frame 532 to move downward, and then drives the rack 581 to move downward. The rack 581 drives the gear 582 to rotate, and the gear 582 drives the gas collecting shell 55 to swing. Through the swing of the gas collecting shell 55, on the one hand, it can stir the treatment solution, so that the welding smoke can fully contact and react in the treatment solution, and the purification effect is further improved. On the other hand, it can cause convection in the treatment solution, and then the treatment solution can continue to flow and penetrate each other, which improves the stirring effect, further enables the welding smoke to fully contact and react in the treatment solution, and further improves the purification effect.

[0047] In the present application, the setting of the sliding part 53 can, on the one hand, realize intermittent delivery of welding smoke to the treatment solution, ensure sufficient contact and reaction of the welding smoke in the treatment solution, thereby improving the purification effect, thereby avoiding the problem of excessive amount of welding smoke delivered, resulting in insufficient treatment of the treatment solution; on the other hand, it drives the gas collecting shell 55 to swing, which has a stirring effect on the treatment solution, so that the welding smoke can fully contact and react in the treatment solution, further improving the purification effect.

[0048] The exhaust assembly 59 includes: a fan 591 connected to the processing box 51, an exhaust pipe 592 connected to the fan 591, and an exhaust head 593 connected to the exhaust pipe 592; the air inlet end of the fan 591 is connected to the processing chamber of the processing box 51, and the air inlet end of the fan 591 is installed with an activated carbon filter, so that the welding smoke can be secondary treated, thereby improving the purification effect of the welding smoke.

[0049] By starting the fan 591, the purified gas can be transported to the exhaust pipe 592 and discharged to the weld through the exhaust head 593, thereby cooling the weld.

[0050] In the present application, the purification mechanism 5 is provided to achieve intermittent delivery of welding smoke to the treatment solution, thereby avoiding the problem of insufficient treatment of the treatment solution due to excessive amount of welding smoke, improving the purification effect, and stirring the treatment solution to allow the welding smoke to fully contact and react in the treatment solution, further improving the purification effect; and the purified gas is discharged to the weld, which has a cooling effect on the weld.

[0051] The protection mechanism 4 includes: a protection shell 41 fixedly mounted on the manipulator 2, a protection plate 42 slidably mounted on the protection shell 41, the protection plate 42 is provided with two guide components 43 for guiding the protection plate 42, and a moving component 44 for driving the laser welding head 3 to move; the guide component 43 includes: a fixed shell 431 fixedly mounted on the protection shell 41, a movable plate 432 movably mounted in the fixed shell 431, and a reset member 433 for driving the protection plate 42 to reset; the movable plate 432 is fixedly connected to the protection plate 42; the moving component 44 includes: a mounting plate 442 fixedly connected to the laser welding head 3, the mounting plate 442 is movably installed in the protective shell 41, and a power source 441 drives the mounting plate 442 to move. The power source 441 is preferably an electric telescopic rod, the power source 441 is fixedly installed in the protective shell 41, and the movable end of the power source 441 is fixedly connected to the mounting plate 442, a limiter 444 is used to limit the mounting plate 442 when it moves, and a round tube 443 fixedly installed on the mounting plate 442, and the round tube 443 is sleeved on the outside of the laser welding head 3.

[0052] The protective plate 42 is provided with an arc groove matching the circular tube 443 .

[0053] When the laser welding head 3 is not in use, it is located inside the protective box, and the protective plate 42 is attached to the protective shell 41. At this time, the protective shell 41 and the protective plate 42 can be arranged to protect the laser welding head 3. On the one hand, the laser welding head 3 can be dustproof when not in use, thereby ensuring the normal use of the laser welding head 3. On the other hand, the laser welding head 3 can be prevented from being damaged by collision, thereby improving the safety of the laser welding head 3.

[0054] When the laser welding head 3 is used, the laser welding head 3 is first moved to the outside of the protective shell 41, that is, the power source 441 is started to drive the mounting plate 442 to move, and the mounting plate 442 drives the laser welding head 3 and the circular tube 443 to move downward, and the end of the circular tube 443 abuts against the arc groove of the protective plate 42, thereby squeezing the protective plate 42, so that the two protective plates 42 move away from each other, and the protective plate 42 drives the movable plate 432 to slide in the fixed shell 431. Since the side wall of the movable plate 432 fits with the inner wall of the fixed shell 431, the fixed shell 431 can guide and limit the movable plate 432 when it moves, thereby guiding and limiting the protective plate 42.

[0055] It should be added here that, through the provision of the circular tube 443, on the one hand, the welding smoke can be collected in a centralized manner, so that after the welding smoke enters the circular tube 443, it will not escape, thereby achieving a better exhaust effect on the welding smoke; on the other hand, it can abut against the protective plate 42, thereby achieving the opening of the protective plate 42, and preparing for the subsequent use of the laser welding head 3.

[0056] The reset member 433 includes: a slider 4331 fixedly installed on the movable plate 432, a fixed rod 4332 for guiding the slider 4331 when it moves, and a reset spring 4333 for driving the protective plate 42 to reset, one end of the reset spring 4333 is fixedly connected to the slider 4331, and the other end of the reset spring 4333 is fixedly connected to the inner wall of the slide groove; a slide groove is opened in the fixed shell 431, and the slider 4331 is slidably installed in the slide groove; both ends of the fixed rod 4332 are fixedly installed in the slide groove.

[0057] When the movable plate 432 moves, it can drive the adjacent slider 4331 to slide in the inner cavity of the slide groove. Through the setting of the fixed rod 4332, on the one hand, the slider 4331 can be limited and guided, thereby further limiting and guiding the protective plate 42; on the other hand, it can prevent the slider 4331 from separating from the slide groove, so that the protective plate 42 is always in contact with the protective shell 41, thereby preventing the protective plate 42 from deviating when moving.

[0058] When the slider 4331 moves, the reset spring 4333 can be deformed; when the laser welding head 3 is used up, the laser welding head 3 moves into the protective shell 41, so that the round tube 443 moves into the protective shell 41, and the round tube 443 is separated from the two protective plates 42. At this time, the elastic force of the reset spring 4333 can drive the slider 4331 to reset, and the slider 4331 drives the movable plate 432 to reset, and the movable plate 432 drives the protective plate 42 to reset, so that the two protective plates 42 close the protective shell 41 again, thereby realizing dust-proof protection for the laser welding head 3, avoiding dust adhering to the surface of the laser welding head 3, which will interfere with the normal transmission and focusing of the laser beam, resulting in a decrease in welding accuracy and affecting the welding quality, thereby ensuring the welding effect of the frame.

[0059] The limiting member 444 includes: a limiting block 4441 fixedly mounted on the mounting plate 442 , and a limiting strip 4442 fixedly mounted in the protection box; the limiting block 4441 is slidably mounted on the limiting strip 4442 .

[0060] When the mounting plate 442 moves, the limiting block 4441 can be driven to slide on the limiting strip 4442. The limiting block 4441 cooperates with the limiting strip 4442 to limit the movement of the mounting plate 442, thereby improving the stability of the mounting plate 442 when moving.

[0061] When the laser welding head 3 is in use, high temperature will be generated. If the laser welding head 3 is not cooled, the laser welding head 3 will easily be overheated, which will affect the welding efficiency and service life.

[0062] The cooling mechanism 6 includes: a water bag 61 fixedly installed between the piston 531 and the air collecting cylinder 52, a cooling pipe 62 respectively connecting the water bag 61 and the cooling cavity of the processing box 51, and a fin 63 fixedly sleeved on the cooling pipe 62; the water bag 61 is connected to the processing box 51 through an inlet pipe 64; a one-way valve 1 is installed on the inlet pipe 64, and a one-way valve 2 is installed on the cooling pipe 62; a part of the cooling pipe 62 is located in the circular tube 443 and spirally surrounds the outer side of the laser welding head 3. When the cooling medium flows through the cooling pipe 62, the laser welding head 3 can be cooled and cooled down, and the surrounding design of the cooling pipe 62 makes the cooling area of ​​the cooling pipe 62 for the laser welding head 3 larger, which is conducive to rapid cooling and cooling of the laser welding head 3.

[0063] It is added here that the cooling medium is preferably: cooling oil; the cooling cavity is connected to an external cold source to continuously cool the cooling medium.

[0064] Since the laser welding head 3 and the pump body 541 are started synchronously, the cooling mechanism 6 can cool down the laser welding head 3 when it starts to be used. That is, when the piston 531 moves downward, it can drive the water bag 61 to be compressed. At this time, the one-way valve 1 is closed and the one-way valve 2 is opened. The cooling medium in the water bag 61 is squeezed into the cooling pipe 62 under pressure, and enters the cooling cavity of the processing box 51 through the cooling pipe 62, thereby realizing the cooling of the laser welding head 3.

[0065] When the piston 531 moves downward, it can drive the water bag 61 to recover. At this time, the one-way valve 1 is opened and the one-way valve 2 is closed. At this time, the cooling medium in the cooling cavity of the processing box 51 can be sucked into the water bag 61, thereby preparing for subsequent work.

[0066] The compression and recovery of the water bag 61 realizes the circulation of the cooling medium, thereby ensuring the cooling effect on the laser welding head 3 .

[0067] In the present application, by setting up the cooling mechanism 6, it is achieved that the laser welding head 3 is cooled when the laser welding head 3 starts to be used, so that the laser welding head 3 can be cooled in time, so that the laser welding head 3 maintains a stable working temperature, and the welding effect of the laser welding head 3 is guaranteed. This solves the problem that the existing frame welding device cannot cool the laser welding head 3 in time during use, which easily causes the laser welding head 3 to overheat and affect the welding efficiency and service life.

[0068] Since the cooling tube 62 is fixedly provided with fins 63 and the fins 63 are located in the processing chamber, when the cooling medium flows through the cooling tube 62, the fins 63 efficiently exchange heat with the processing solution, thereby cooling the processing solution and further cooling the welding smoke.

[0069] In addition, since the gas collecting shell 55 stirs the treatment solution, the treatment solution is fully in contact with the fins 63, thereby improving the cooling effect on the treatment solution, and further improving the cooling effect on the welding smoke.

[0070] In the present application, the cooling mechanism 6 and the purification mechanism 5 cooperate with each other to cool the treated welding smoke, thereby avoiding the problem that the treated welding smoke still has a very high temperature, which leads to a reduction in the service life of the activated carbon filter. As the cooled low-temperature gas flows, the exhaust component 59 discharges the low-temperature gas to the weld, cools the weld, and improves the cooling efficiency.

[0071] The frame welding device of the present invention further includes: a dust removal mechanism 7 for removing dust from the laser welding head 3 before use; the dust removal mechanism 7 includes: an air bag 71 fixedly installed between the fixed shell 431 and the movable plate 432, and an air guide pipe 72 connecting the air bag 71 and the annular pipe 542.

[0072] When the two protective plates 42 move away from each other, the adjacent movable plates 432 can be driven away from each other, thereby squeezing the adjacent airbags 71, so that the gas in the airbags 71 is discharged, and the gas enters the annular tube 542 through the air guide tube 72, and then enters the circular tube 443 through the connecting tube 543. At this time, the gas is discharged from the circular tube 443, and the airflow can remove the dust that may be attached to the surface of the laser welding head 3, so that the laser welding head 3 can be dust-removed before use, thereby ensuring the welding effect of the frame.

[0073] Through the cooperation of the protective shell 41, the protective plate 42, and the dust removal mechanism 7, on the one hand, when the laser welding head 3 is not in use, the laser welding head 3 can be protected from dust, thereby avoiding dust adhering to the surface of the laser welding head 3, which will interfere with the normal transmission and focusing of the laser beam, resulting in a decrease in welding accuracy and affecting the welding quality, thereby ensuring the welding effect of the frame; on the other hand, the laser welding head 3 can be dusted before being used, thereby further ensuring the welding effect of the frame.

[0074] During the resetting process of the two protective plates 42, the airbag 71 can drive the movable plate 432 to reset when it is restored, and then drive the adjacent protective plate 42 to reset; in this process, through the cooperation between the airbag 71 and the reset spring 4333, the protective plates 42 can be jointly driven to reset, so that the protective plates 42 are reset under the double elastic force, so that the two protective plates 42 are tightly fitted, and the sealing effect of the protective shell 41 is good.

[0075] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0076] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A frame welding device, characterized in that: include: A laser welding head, a protection mechanism for protecting the laser welding head when not in use, a purification mechanism for purifying welding fumes generated during welding, and a cooling mechanism for cooling the laser welding head during use; The purification mechanism comprises: a processing box, a gas collecting cylinder fixedly installed in the processing box, a sliding member slidably installed in the gas collecting cylinder, an air intake assembly for conveying welding smoke into the gas collecting cylinder, a gas collecting shell connected to the gas collecting cylinder, a gas outlet head connected to the gas collecting shell, a linkage assembly for driving the gas collecting shell to swing, and an exhaust assembly for discharging the purified welding smoke; The linkage assembly comprises: a rack fixedly connected to the sliding member, and a gear meshingly connected to the rack; the gear is rotatably installed in the processing box, and the gas collecting shell is coaxially connected to the gear; The sliding member comprises: a piston slidably mounted in the gas collecting cylinder, a movable frame fixedly connected to the piston, and a linkage spring driving the piston to return to its original position; The exhaust assembly includes: a fan connected to the processing box, an exhaust pipe connected to the fan, and an exhaust head connected to the exhaust pipe.

2. A vehicle frame welding device as claimed in claim 1, characterized in that: The air intake assembly comprises: a connecting pipe, an annular pipe communicating with the connecting pipe, and a pump body communicating with the annular pipe; the pump body is communicated with a gas collecting cylinder.

3. A vehicle frame welding device as claimed in claim 1, characterized in that: The protection mechanism comprises: a protection shell, a protection plate slidably mounted on the protection shell, a guide component for guiding the protection plate, and a moving component for driving the laser welding head to move.

4. A vehicle frame welding device as claimed in claim 3, characterized in that: The guide assembly comprises: a fixed shell fixedly mounted on the protective shell, a movable plate movably mounted in the fixed shell, and a reset member driving the protective plate to reset; the movable plate is fixedly connected to the protective plate.

5. A vehicle frame welding device as claimed in claim 4, characterized in that: The reset member includes: a slider fixedly mounted on the movable plate, a fixed rod guiding the slider when it moves, and a reset spring driving the protective plate to reset; a slide groove is provided in the fixed shell, and the slider is slidably mounted in the slide groove.

6. A vehicle frame welding device as claimed in claim 4, characterized in that: The moving assembly includes: a mounting plate fixedly connected to the laser welding head, a power source for driving the mounting plate to move, a limiting member for limiting the position of the mounting plate when it moves, and a round tube fixedly mounted on the mounting plate.

7. A vehicle frame welding device as claimed in claim 6, characterized in that: The limiting member comprises: a limiting block fixedly mounted on the mounting plate, and a limiting strip fixedly mounted in the protection box; the limiting block is slidably mounted on the limiting strip.

8. A vehicle frame welding device as claimed in claim 1, characterized in that: The cooling mechanism comprises: a water bag fixedly installed between the piston and the gas collecting cylinder, a cooling pipe respectively connecting the water bag and the processing box, and a fin fixedly sleeved on the cooling pipe; the water bag is connected with the processing box.

9. A vehicle frame welding device as claimed in claim 4, characterized in that: Also includes: A dust removal mechanism for removing dust from the laser welding head before use; The dust removal mechanism comprises: an air bag fixedly installed between the fixed shell and the movable plate, and an air guide pipe connecting the air bag and the annular pipe.

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