Welding equipment and welding production lines

Abstract

The present invention provides a welding device and a welding production line. The welding device includes a positioner, a rotating cage mechanism, a workpiece transfer mechanism, a positioning tool, and a welding robot. The rotating cage mechanism includes a rotating cage, a conveyor roller arranged on the rotating cage and parallel to each other, and a support platform. The rotating cage is horizontally arranged on the positioner and can be driven to rotate by the positioner, and during the rotation process, the conveyor roller and the support platform can change their relative positions up and down. Both ends of the rotating cage are also provided with a workpiece inlet and outlet connected to the conveyor roller. The workpiece transfer mechanism is arranged on the rotating cage and is arranged corresponding to the conveyor roller and the support platform, and is used to transfer the workpiece between the conveyor roller and the support platform. The positioning tool is arranged on the rotating cage mechanism and is used to position the workpiece on the rotating cage mechanism. The welding robot is arranged outside the rotating cage mechanism and is used to weld the workpiece after the workpiece is positioned. The welding device of the present invention has good flexibility, a high degree of automation, and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automated manufacturing equipment, and in particular to welding equipment. Background Art

[0002] End beams are a relatively mature modular product in the semi-trailer industry and serve as a key load-bearing component connecting the longitudinal beams of semi-trailers. Traditional end beam welding in the industry often uses simple positioning fixtures to position the end beam on a separate welding station. Deformation treatment is then performed after welding. This results in high quality control challenges, a low degree of automation, and the need for a large number of personnel to maintain production schedules, resulting in low efficiency and high production costs.

[0003] Furthermore, due to the wide variety of end beam types used by different vehicles, different production methods are required for each end beam. For example, the front beams of straight-back vehicles typically use dedicated welding robots to create long, straight welds, while the front beams of small gooseneck vehicles typically use manual welding for short, horizontal, and vertical welds. This results in poor weld quality consistency. Different end beams require their own welding equipment, resulting in poor compatibility. Summary of the Invention

[0004] An object of the present invention is to provide a welding device and a welding production line to solve the problem of low efficiency caused by low degree of automation in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, the present invention provides a welding device, including a positioner, a rotating cage mechanism, a workpiece transfer mechanism, a positioning tool and a welding robot; the rotating cage mechanism includes a rotating cage, a conveyor roller arranged on the rotating cage and parallel to each other, and a support platform; the rotating cage is horizontally arranged on the said positioner, and can be driven to rotate by the said positioner, and during the rotation process, the conveyor roller and the support platform can change the upper and lower relative positions; the two ends of the rotating cage are also provided with a workpiece inlet and outlet connected to the said conveyor roller; the workpiece transfer mechanism is arranged on the said rotating cage and is arranged corresponding to the said conveyor roller and the said support platform, for transferring the workpiece between the said conveyor roller and the said support platform; the positioning tool is arranged on the said rotating cage mechanism, for positioning the workpiece on the said rotating cage mechanism; the welding robot is arranged outside the said rotating cage mechanism, for welding the workpiece after the workpiece is positioned.

[0007] Preferably, the positioning tool includes a centering clamping unit; the centering clamping unit includes two clamping blocks arranged opposite to each other in the width direction of the support platform, and the two clamping blocks can be relatively close to or far away from each other, and are used to clamp the workpiece from both sides of the workpiece to center the workpiece on the support platform.

[0008] Preferably, the two clamping blocks are driven to move by their own clamping block driving members respectively; the centering clamping unit further comprises a synchronization component, which connects the two clamping blocks so that the two clamping blocks move synchronously.

[0009] Preferably, the synchronization assembly includes a gear and two racks respectively meshing with the gear; the rotation axis of the gear is fixed relative to the support platform, and the two racks are each connected and fixed to one of the clamping blocks.

[0010] Preferably, the positioning tool also includes a lateral positioning clamping unit; the lateral positioning clamping unit includes a middle positioning component and an end clamping component respectively arranged on both sides of the width direction of the support platform; the middle positioning component is located in the middle of the length direction of the support platform to provide anti-deformation support to the workpiece from the middle of one side of the workpiece during welding; the end clamping components are arranged corresponding to the two ends of the length direction of the support platform to provide anti-deformation support to the workpiece from the two ends of the other side of the workpiece during welding.

[0011] Preferably, the middle positioning assembly includes a positioning block that can be raised and lowered relative to the support platform, and the positioning block supports the side of the workpiece when it extends from the support platform.

[0012] Preferably, the end clamping assembly includes a rocker arm rotatably connected to the rotating cage at one end and a rocker arm driving member that drives the rocking rotation; the end of the rocker arm corresponds to the end in the length direction of the support platform and can be pressed against the workpiece under the drive of the rocking driving member.

[0013] Preferably, the workpiece transfer mechanism includes a plurality of push rods; the push rods are arranged at intervals along the conveying direction of the conveying roller; the push rods are installed on the outside of the conveying roller and can pass through the conveying roller to extend toward the support platform; when the push rods extend toward the support platform, the workpiece can be lifted onto the support platform, and when the push rods retract, the workpiece supported thereon can be transferred to the conveying roller.

[0014] Preferably, one of the push rods is an anti-deformation push rod, which is arranged corresponding to the middle part of the support platform in the length direction, so as to push against the middle part of the workpiece when the workpiece is welded to control the welding deformation of the workpiece.

[0015] Preferably, the positioning tooling includes a downward pressing clamping unit; the downward pressing clamping unit includes two pressure rods, which are installed on the outside of the support platform and can extend through the support platform toward the conveying roller; the two pressure rods are arranged at both ends of the length direction of the support platform to cooperate with the anti-deformation push rod to push against the two ends of the workpiece from the other side of the workpiece.

[0016] Preferably, the end of the push rod is further provided with an electromagnet for adsorbing the workpiece.

[0017] Preferably, the positioner comprises two machine bases arranged horizontally at intervals, with transition rollers provided on the outer sides of the machine bases, and the transition rollers are connected to the workpiece inlet and outlet of the rotating cage.

[0018] Preferably, the rotating cage includes two spaced end frames and two sets of cross beams connected between the two end frames; the two end frames are respectively connected to the positioner, and the workpiece inlet and outlet are set in the middle of the end frames; the two sets of cross beams are respectively used to install the conveying roller and the support platform.

[0019] Preferably, the positioning fixture includes a stopper that can be raised and lowered relative to the conveying roller, and the stopper protrudes from the conveying roller when raised to stop the workpiece.

[0020] Preferably, the welding robots are symmetrically arranged on both sides of the rotating cage mechanism.

[0021] According to another aspect of the present invention, the present invention provides a welding production line, comprising the welding device as described above.

[0022] As can be seen from the above technical solution, the advantages and positive effects of the present invention are as follows: In the welding equipment of the present invention, the conveyor rollers and the support platform are arranged relative to each other on the rotating cage, and the relative position relationship between the conveyor rollers and the support platform can be changed by rotating the rotating cage. In conjunction with the workpiece transfer mechanism, the workpiece can be both conveyed by the conveyor rollers and supported by the support platform. The position of the workpiece can be flexibly changed in the rotating cage mechanism, and the workpiece can be positioned in a suitable position according to actual needs. The welding equipment has a wider range of applications, and the workpiece can be welded by a welding robot, resulting in a high degree of welding automation. The welding equipment can be connected to the upstream and downstream process equipment through the workpiece inlet and outlet, facilitating the automated operation of the production line and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 2 is a schematic diagram of the use status of a preferred embodiment of the welding equipment of the present invention.

[0024] Figure 2 2 is a schematic structural diagram of a preferred embodiment of the welding equipment of the present invention, in which the welding robot is omitted.

[0025] Figure 3 It is a structural diagram of the rotating cage mechanism in a preferred embodiment of the welding equipment of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the centering clamping unit in a preferred embodiment of the welding equipment of the present invention.

[0027] The following are the descriptions of the reference numerals: 1. Positioner; 11. Machine base; 12. Transition roller; 2. Cage mechanism; 21. Cage; 211. End frame; 2111. Workpiece inlet and outlet; 212. Crossbeam; 213. Mounting plate; 22. Conveyor roller; 221. Roller; 23. Support platform; 231. Avoidance hole; 3. Workpiece transfer mechanism; 31. Push rod; 31a. Middle push rod; 31b. End push rod; 41. Stopper; 42. Centering clamp Unit; 421, centering clamping assembly; 4211, clamping block; 4212, clamping block driving member; 422, synchronization assembly; 4221, gear; 4222, rack; 43, lateral positioning clamping unit; 431, middle positioning assembly; 432, end clamping assembly; 4321, rocker; 4322, rocker driving member; 44, downward pressing clamping unit; 441, pressure rod; 5, welding robot; 6, slide; 7, slide rail; 9, workpiece. DETAILED DESCRIPTION

[0028] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0029] The present invention provides a welding apparatus and a welding production line equipped with the same, which can be used for automated welding of workpieces such as vehicle frame end beams. The welding production line includes at least an assembly device, which is located upstream of the welding apparatus and interfaces with the welding apparatus directly or via a conveyor mechanism. The workpiece is assembled, positioned, and spot welded in the assembly device, after which it is transferred to the welding apparatus of the present invention for welding and forming.

[0030] like Figure 1 As shown, in a preferred embodiment, the welding equipment mainly includes a positioner 1, a rotating cage mechanism 2, a workpiece transfer mechanism 3, a positioning tool, and a welding robot 5. The rotating cage mechanism 2 is provided with a conveyor roller 22 for conveying the workpiece 9 and a support platform 23 for supporting the workpiece 9. The rotating cage mechanism 2 is driven by the positioner 1 to rotate so that the conveyor roller 22 and the support platform 23 can change the relative position up and down. The workpiece transfer mechanism 3 can transfer the workpiece 9 between the conveyor roller 22 and the support platform 23. The positioning tool positions the workpiece 9 on the rotating cage mechanism 2 so that the welding robot 5 can automatically weld the workpiece 9.

[0031] Furthermore, by cooperating with the corresponding structure of the positioning fixture, the workpiece 9 can be subjected to anti-deformation treatment during welding, thereby improving the welding quality.

[0032] In addition, by providing different structural forms of the positioning fixtures, the welding equipment can also be adapted for welding workpieces 9 of various forms, thereby improving the versatility of the welding equipment.

[0033] See also Figures 1 to 3 , the following is a detailed introduction to the structure of each part of the welding equipment.

[0034] The positioner 1 provides a driving force for rotation around a horizontal axis and includes two horizontally spaced machine bases 11, which are used to connect with the previous process equipment and the next process equipment respectively. Preferably, a transition roller 12 is provided on the outside of the machine base 11 to facilitate the transfer of the workpiece 9.

[0035] The rotating cage mechanism 2 uses the rotating cage 21 as a support for various structures, which facilitates the arrangement of the conveying roller 22, the supporting platform 23, the workpiece transfer mechanism 3 and the positioning tooling.

[0036] The rotating cage 21 comprises two spaced-apart end frames 211 and two sets of crossbeams 212 connected between the end frames 211. The end frames 211 are connected to the two machine bases 11 of the positioner 1, respectively, to be driven by the positioner 1 for rotation. A through hole is formed in the center of the end frames 211, forming a workpiece inlet and outlet 2111 for the entry and exit of the workpiece 9. The workpiece inlet and outlet 2111 communicates with the transition roller 12 on the outside of the machine base 11. Each set of crossbeams 212 includes two spaced-apart beams 212, each end of which is connected to the end frame 211 and surrounds the workpiece inlet and outlet 2111.

[0037] The support platform 23 is installed on the inner side of one group of cross beams 212 of the rotating cage 21 . The inner surface of the support platform 23 faces the interior of the rotating cage 21 . The inner surface of the support platform 23 is used to support the workpiece 9 .

[0038] The conveyor rollers 22 are mounted on another set of beams 212 of the rotating cage 21, parallel to and opposite the support platform 23. As the rotating cage 21 rotates, the vertical relative positions of the conveyor rollers 22 and the support platform 23 change. The conveyor rollers 22 extend along the length of the beams 212 and communicate with the workpiece access ports 2111 of the two end frames 211. This allows workpieces 9 transferred from the previous process to enter the conveyor rollers 22 through the workpiece access port 2111 of one end frame 211 and continue to be transferred to the other end frame 211, where they are then transferred to the next process. The conveyor rollers 222 include a plurality of spaced rollers 221, each of which is connected to a beam 212 at its ends. Each roller 221 rotates to convey the workpiece 9. The driving force for the rollers 221 is provided by corresponding roller drivers (not shown).

[0039] A mounting plate 213 is further provided on the outer side of the group of cross beams 212 corresponding to the conveying roller 22 , and the roller driving component can be installed on the mounting plate 213 .

[0040] The workpiece transfer mechanism 3 is also mounted on the mounting plate 213 and includes a plurality of hydraulically driven push rods 31. Each push rod 31 is positioned corresponding to the spacing between rollers 221 on the conveyor roller conveyor 22, allowing it to extend through the conveyor roller conveyor 22 toward the support platform 23. Each push rod 31 can be, for example, a hydraulic cylinder push rod.

[0041] When the push rod 31 extends toward the support platform 23 , the workpiece 9 can be lifted to the inner surface of the support platform 23 . When the push rod 31 retracts, the workpiece 9 supported thereon can be transferred to the conveying roller 22 .

[0042] Preferably, an electromagnet (not shown in the figure) is further provided at the end of each push rod 31 to absorb the workpiece 9 during the transfer process of the workpiece 9 and improve the stability of the workpiece 9 during the transfer process.

[0043] In this embodiment, three push rods 31 are provided, located at both ends and in the middle of the mounting plate 213 along its length. For ease of distinction, the two push rods 31 at each end are referred to as end push rods 31b, and the push rod 31 in the middle is referred to as middle push rod 31a. The middle push rod 31a also corresponds to the middle of the length of the support platform 23, i.e., the middle of the workpiece 9 during welding. The middle push rod 31a serves as an anti-deformation push rod, pressing against the middle of the workpiece 9 during welding to control welding deformation of the workpiece 9.

[0044] The positioning tooling is provided corresponding to the support platform 23 and the conveying roller 22, and the workpiece 9 is positioned and clamped during welding, and can further cooperate with the workpiece transfer mechanism 3 to realize the anti-deformation processing during welding. The positioning tooling can be designed with a corresponding structural form according to the workpiece structure applicable to the welding equipment.

[0045] In this embodiment, the positioning fixture includes a stopper 41 that can be raised and lowered relative to the conveyor roller 22 to position the workpiece 9 in the conveying direction. When lowered, the stopper 41 does not affect the conveying of the workpiece 9. When raised, the stopper 41 protrudes beyond the conveyor roller 22 to stop the workpiece 9. The stopper 41 can be raised and lowered by a hydraulic cylinder, pneumatic cylinder, or other mechanism, with the raising and lowering direction of the stopper 41 perpendicular to the conveying direction of the conveyor roller 22.

[0046] Furthermore, the positioning fixture also includes a centering clamping unit 42, a lateral positioning clamping unit 43 and a downward pressing clamping unit 44, which can be applied to clamping of different types of workpieces during welding.

[0047] See Figure 2 and Figure 4The centering clamping units 42 are used to position and clamp the workpiece 9 across the width of the support platform 23 when the workpiece 9 is supported on the support platform 23. Two groups of centering clamping units 42 are spaced apart along the length of the support platform 23. Each group of centering clamping units 42 includes two centering clamping assemblies 421 disposed opposite each other across the width of the support platform 23, and further includes a synchronization assembly 422 for controlling the synchronous movement of the two centering clamping assemblies 421.

[0048] The centering clamping assembly 421 includes a clamping block 4211 and a clamping block driver 4212 that drives the clamping blocks 4211. The clamping blocks 4211 of the two centering clamping assemblies 421 are opposed to each other and can move closer or further apart. When the two clamping blocks 4211 are relatively close, they can clamp the workpiece 9 from both sides and center the workpiece 9 in the width direction of the support platform 23. The clamping block driver 4212 can be, for example, a cylinder or similar structure that can drive the clamping blocks 4211 to move linearly.

[0049] Synchronizing assembly 422 includes a gear 4221 and two racks 4222 meshing with gear 4221. The mounting shaft (not numbered in the figure) of gear 4221 is fixed to support platform 23, allowing gear 4221 to rotate relative to support platform 23. The two racks 4222 are parallel and each is fixedly connected to a clamping block 4211. The meshing of gear 4221 constrains the two racks 4222 to mutually restrain each other, ensuring synchronous movement of the two clamping blocks 4211 connected to the racks 4222.

[0050] See Figure 2 The lateral positioning and clamping unit 43 is suitable for positioning and clamping the workpiece 9 when the support platform 23 is in a vertical position. At the same time, its structure can also control the welding deformation of the workpiece 9. The lateral positioning and clamping unit 43 includes a central positioning assembly 431 and an end clamping assembly 432 arranged on both sides of the support platform 23 in the width direction.

[0051] The central positioning assembly 431 is located in the middle of the length of the support platform 23. Preferably, the central positioning assembly 431 includes a positioning block (not shown) that can be raised and lowered relative to the support platform 23, and a positioning block driver (not numbered in the figure) that drives the positioning block up and down. The central positioning assembly 431 is mounted on the outer surface of the support platform 23. When the positioning block is raised, it extends beyond the inner surface of the support platform 23, thereby providing anti-deformation support for the workpiece 9 from the middle of one side during welding.

[0052] End clamping assemblies 432 are positioned at opposite ends of the support platform 23 to provide counter-deformation support to the workpiece 9 from opposite ends during welding. In this embodiment, end clamping assemblies 432 include a rocker 4321 rotatably connected at one end to the rotating cage 21, and a rocker driver 4322 that drives rocker 4321. The distal end of rocker 4321 corresponds to the longitudinal end of the support platform 23 and, driven by rocker driver 4322, presses against the workpiece 9.

[0053] See Figure 3 , the downward pressing clamping unit 44 cooperates with the middle push rod 31a of the workpiece transfer mechanism 3 to directly position and clamp the workpiece 9, and the workpiece 9 is not supported by the support platform 23. The downward pressing clamping unit 44 includes two pressure rods 441 that are hydraulically driven to rise and fall. The pressure rods 441 are installed on the outside of the support platform 23 and can pass through the support platform 23 and extend toward the conveying roller 22. Correspondingly, avoidance holes 231 are provided at corresponding positions of the support platform 23. The two pressure rods 441 are arranged at both ends of the length direction of the support platform 23, opposite to the middle push rod 31a, and push against the two ends of the workpiece 9 from the other side of the workpiece 9. The two pressure rods 441 cooperate with the middle push rod 31a to directly position and clamp the workpiece 9, and can also control the welding deformation of the workpiece 9. The pressure rod 441 can also be a cylinder push rod structure.

[0054] Preferably, see Figure 1 Welding robots 5 are symmetrically arranged on either side of the rotating cage mechanism 2, enabling simultaneous welding of both sides of the workpiece 9, thus facilitating control of the post-weld deformation of the workpiece 9. A slide rail 7 is positioned on each side of the positioner 1, parallel to the axis of the rotating cage 21. The welding robots 5 are movably mounted on the slide rails 7 via a slide 6, allowing them to move along the rails 7 and weld the long seams of the workpiece 9.

[0055] Based on the structure of the above welding equipment, taking the welding of the frame end beam as an example, the working principle of the welding equipment is further introduced.

[0056] The welding equipment has two sets of welding robots 5 symmetrically arranged on both sides of the rotating cage 21, and is also equipped with a centering clamping unit 42, a lateral positioning clamping unit 43 and a downward pressing clamping unit 44. It can be used for welding skeleton car end beams, small gooseneck frame end beams and flat barn frame end beams.

[0057] 1. Welding of the front and rear end beams of the skeleton vehicle and the rear end beam of the small gooseneck frame:

[0058] This type of end beam structure includes a channel steel and an upper cover plate covering the channel steel opening. The upper cover plate also has locks at both ends, and the channel steel is also provided with end cover plates at both ends. The end beam enters the welding equipment with the channel steel opening facing upward.

[0059] First, the state of the control cage 21 is that the conveying roller 22 is located at the bottom and the supporting platform 23 is located at the top. The end beam is conveyed to the conveying roller 22 by the previous process, and the stopper 41 rises to stop the end beam after it is in place.

[0060] Each push rod 31 is raised to support the end beam until it is firmly pressed against the support platform 23. During this lifting process, the electromagnet at the end of the push rod 31 is energized to assist in tightening the end beam. At this point, the upper cover plate of the end beam contacts the inner surface of the support platform 23, and the locking head extends outward from the avoidance hole 231 in the support platform 23.

[0061] The positioner 1 drives the cage 21 to turn 180 degrees, adjusting the state of the cage 21 so that the support platform 23 is located at the bottom and the conveying roller 22 is located at the top. The end beam is supported by the support platform 23 and the push rod 31 retracts.

[0062] The centering clamping unit 42 is activated, and the clamping blocks 4211 center and clamp the end beam from both sides. The middle push rod 31a extends and presses against the middle of the end beam to counteract deformation and clamp. The welding robot 5 welds the end beam simultaneously from both sides.

[0063] After welding is completed, the centering clamping unit 42 retracts, and the end push rods 31b extend until they contact the end beam. The electromagnets at the ends of the push rods 31 are energized to tighten the end beam.

[0064] The positioner 1 drives the cage 21 to turn 180 degrees again, and the cage 21 is adjusted to the state where the conveyor roller 22 is at the bottom and the support platform 23 is at the top. Each push rod 31 is retracted, and the end beam falls until it contacts the conveyor roller 22 and is supported by the conveyor roller 22.

[0065] The conveying roller 22 starts to convey the welded end beam to the next process.

[0066] 2. For the welding of the front end beam of the small gooseneck frame:

[0067] This type of end beam consists of a channel steel, an I-shaped reinforcement positioned within the channel steel opening, and end caps at each end of the channel steel. The I-shaped reinforcement extends along the length of the channel steel and connects to the channel steel's two wing plates. The end beam enters the welding equipment with the channel steel opening facing the end clamping assembly 432.

[0068] Similarly, first control the state of the rotating cage 21 so that the conveying roller 22 is located at the bottom and the supporting platform 23 is located at the top. The end beam is conveyed to the conveying roller 22 by the previous process, and the stopper 41 rises to stop the end beam after it is in place.

[0069] Each push rod 31 lifts the end beam to the support platform 23, the cage 21 turns 180 degrees, so that the end beam is supported by the support platform 23, and the push rod 31 retracts.

[0070] The positioning block of the middle positioning assembly 431 rises to support the middle part of the web of the end beam channel steel, and the rocker arm 4321 of the end clamping assembly 432 presses against the opening of the channel steel from both ends of the channel steel. The middle positioning assembly 431 and the end clamping assembly 432 cooperate to clamp the end beam in position, effectively controlling the welding deformation of the end beam.

[0071] The positioner 1 drives the rotating cage 21 to turn 90 degrees, and the state of the rotating cage 21 is adjusted so that the supporting platform 23 and the conveying roller 22 are both in a vertical state. The welding robot 5 welds the end beam from both sides at the same time.

[0072] After welding is completed, the rotating cage 21 is turned 90 degrees and adjusted so that the support platform 23 is at the bottom and the conveyor roller 22 is at the top. Each push rod 31 extends out to contact the end beam, and the electromagnet at the end of each push rod 31 is energized to tighten the end beam.

[0073] The positioner 1 drives the cage 21 to turn 180 degrees again, and the cage 21 is adjusted to the state where the conveyor roller 22 is at the bottom and the support platform 23 is at the top. Each push rod 31 is retracted, and the end beam falls until it contacts the conveyor roller 22 and is supported by the conveyor roller 22.

[0074] The conveying roller 22 starts to convey the welded end beam to the next process.

[0075] 3. For the welding of the front and rear end beams of the flat bar warehouse frame:

[0076] This type of end beam includes a channel steel and a plurality of reinforcement members arranged in the opening of the channel steel, wherein the reinforcement members are arranged in intervals in the channel steel. The end beam enters the welding equipment with the channel steel opening facing upward.

[0077] Similarly, first control the state of the rotating cage 21 so that the conveying roller 22 is located at the bottom and the supporting platform 23 is located at the top. The end beam is conveyed to the conveying roller 22 by the previous process, and the stopper 41 rises to stop the end beam after it is in place.

[0078] Each push rod 31 rises, and the electromagnet at the end of each push rod 31 is energized. The push rod 31 absorbs the end beam and pushes the end beam upward for a distance, so that there is a gap between the end beam and the conveying roller 22 and the support platform 23.

[0079] The pressure rods 441 of the clamping unit 44 extend to clamp the ends of the end beam. The push rods 31b at the two ends retract, and the middle push rod 31a and the two pressure rods 441 clamp the end beam in place. The welding robot 5 welds the end beam simultaneously from both sides.

[0080] After welding is completed, the push rods 31b at both ends extend to contact the end beam, the two pressure rods 441 retract, and the end beam is again supported by the push rods 31. The push rods 31 retract synchronously, and the end beam falls until it contacts the conveyor roller 22 and is supported by the conveyor roller 22.

[0081] The conveying roller 22 starts to convey the welded end beam to the next process.

[0082] The welding equipment of the present invention is not limited to the welding of vehicle frame end beams, but can also be applied to the welding of other workpieces with long welds.

[0083] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A welding device, characterized in that: include: Positioner; The rotating cage mechanism includes a rotating cage, a conveyor roller arranged on the rotating cage and parallel to each other, and a support platform; the rotating cage is horizontally arranged on the positioner and can be driven to rotate by the positioner, and the conveyor roller and the support platform can change their relative positions up and down during the rotation process; the two ends of the rotating cage are also provided with a workpiece inlet and outlet connected to the conveyor roller; a workpiece transfer mechanism, provided on the rotating cage and corresponding to the conveying roller and the supporting platform, for transferring the workpiece between the conveying roller and the supporting platform; A positioning tool, provided on the rotating cage mechanism, for positioning the workpiece on the rotating cage mechanism; A welding robot is arranged outside the rotating cage mechanism and is used to weld the workpiece after the workpiece is positioned; The workpiece transfer mechanism includes a plurality of push rods; the push rods are arranged at intervals along the conveying direction of the conveying roller; Each push rod is installed on the outside of the conveying roller and can pass through the conveying roller and extend toward the supporting platform; When the push rod extends toward the support platform, the workpiece can be lifted onto the support platform, and when the push rod retracts, the workpiece supported thereon can be transferred to the conveying roller; One of the push rods is an anti-deformation push rod, which is arranged corresponding to the middle part of the support platform in the length direction, so as to push against the middle part of the workpiece during welding to control the welding deformation of the workpiece.

2. The welding equipment according to claim 1, characterized in that The positioning fixture includes a centering clamping unit; The centering clamping unit includes two clamping blocks arranged opposite to each other in the width direction of the support platform. The two clamping blocks can be relatively close to or away from each other and are used to clamp the workpiece from both sides of the workpiece to center the workpiece on the support platform.

3. The welding equipment according to claim 2, characterized in that The two clamping blocks are driven to move by their own clamping block driving members respectively; the centering clamping unit also includes a synchronization component, which connects the two clamping blocks to enable the two clamping blocks to move synchronously.

4. The welding equipment according to claim 3, characterized in that The synchronization component includes a gear and two racks respectively meshing with the gear; the rotation axis of the gear is fixed relative to the support platform, and the two racks are each connected and fixed to one of the clamping blocks.

5. The welding equipment according to claim 2, characterized in that The positioning tool also includes a lateral positioning clamping unit; The lateral positioning and clamping unit includes a middle positioning assembly and an end clamping assembly arranged on both sides of the width direction of the support platform; The middle positioning assembly is located in the middle of the length direction of the support platform to provide anti-deformation support to the workpiece from the middle of one side of the workpiece during welding; The end clamping assemblies are arranged corresponding to the two ends of the support platform in the length direction, so as to provide anti-deformation support to the workpiece from the two ends on the other side of the workpiece during welding.

6. The welding device according to claim 5, characterized in that The middle positioning assembly includes a positioning block that can be raised and lowered relative to the support platform. When the positioning block extends from the support platform, it supports the side of the workpiece.

7. The welding device according to claim 5, characterized in that The end clamping assembly includes a rocker arm rotatably connected to the rotating cage at one end and a rocker arm driving member for driving the rocker arm to rotate; the end of the rocker arm corresponds to the end of the supporting platform in the length direction and can be pressed against the workpiece under the drive of the rocker arm driving member.

8. The welding equipment according to claim 1, characterized in that The positioning tooling includes a downward pressing clamping unit; The downward clamping unit includes two pressure rods, which are installed on the outside of the support platform and can pass through the support platform and extend toward the conveying roller. The two pressing rods are arranged at both ends of the supporting platform in the length direction to cooperate with the anti-deformation push rod to push against the two ends of the workpiece from the other side of the workpiece.

9. The welding device according to claim 1, characterized in that The end of the push rod is also provided with an electromagnet for adsorbing the workpiece.

10. The welding equipment according to any one of claims 1 to 7, characterized in that: The positioner comprises two machine bases arranged horizontally and spaced apart. Transition rollers are arranged on the outer sides of the machine bases. The transition rollers are communicated with the workpiece inlet and outlet of the rotating cage.

11. The welding equipment according to any one of claims 1 to 7, characterized in that: The rotating cage includes two end frames arranged at intervals and two groups of cross beams connected between the two end frames; the two end frames are respectively connected to the positioner, and the workpiece inlet and outlet are set in the middle of the end frames; the two groups of cross beams are respectively used to install the conveying roller and the supporting platform.

12. The welding device according to any one of claims 1 to 7, characterized in that: The positioning fixture includes a stopper that can be raised and lowered relative to the conveying roller. When the stopper is raised, it protrudes from the conveying roller to stop the workpiece.

13. The welding device according to any one of claims 1 to 7, characterized in that: The welding robots are symmetrically arranged on both sides of the rotating cage mechanism.

14. A welding production line, characterized in that: Comprising the welding device according to any one of claims 1-13.

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