Adjustable welding equipment for semitrailer chassis supporting legs

Abstract

The invention discloses adjustable welding equipment for semitrailer chassis supporting legs, and relates to the technical field of welding equipment. The adjustable welding equipment for the semitrailer chassis supporting legs comprises synchronous distance adjusting devices, the synchronous distance adjusting devices are used for guiding the downward moving direction of leg bodies and limiting the positions of the longitudinal axes of the leg bodies, and the bottom end of each synchronous distance adjusting device abuts against a material containing pressurizing device; the material placing and pressurizing device is used for limiting the downward moving height of the leg body and clamping the leg body, and the centering clamp is used for fixing the connecting plate and enabling the longitudinal symmetry plane of the connecting plate and the longitudinal symmetry plane of the first middle position plate to be located on the same plane. According to the adjustable welding equipment for the semitrailer chassis supporting leg, the centering clamp and the synchronous distance adjusting device are matched and fix the leg body and the connecting plate correspondingly, the maximum clamping force of the synchronous clamping plate is limited through the material placing and pressurizing device, the leg body is fastened, the welding seam position precision is high, materials are changed in a wheel-to-wheel mode, and the welding work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to an adjustable welding equipment for a semi-trailer chassis leg. Background Art

[0002] The welding accuracy of a semi-trailer's chassis legs directly affects the vehicle's load-bearing stability and safety. Adjustable welding equipment, by flexibly adapting to legs of different specifications and automatically assisting in positioning, has become a key solution to the low efficiency and poor precision of traditional manual welding.

[0003] With reference to Chinese patent publication number: CN119635112A, an adjustable welding device for semi-trailer chassis legs comprises a storage bin and a welding table, wherein both ends of the storage bin are fixedly connected to a connecting frame, and both sides of the vertical center line of the welding table are fixedly connected to the storage bin. When the outer leg of the leg is placed on the welding table, the worker steps on the pedal with his foot. After stepping on the pedal, the leg connecting plate will first move out from the inner side of the storage bin, and then, under the action of the first guide plate and the second guide plate, the leg connecting plates on both sides are simultaneously fixed on both sides of the outer leg of the leg. In the above manner, after the outer leg of the leg is placed on the welding table, the worker only needs to step on the pedal to quickly complete the rapid fitting and fixing of the outer leg of the leg and the leg connecting plates on both sides. There is no need for the worker to fit and fix the leg connecting plates on both sides to the outer legs of the leg separately. The operation is simple and convenient for the worker to use, thereby improving the overall welding efficiency.

[0004] The outriggers used in semi-trailers are large and heavy, and are usually hoisted onto a workbench using a lifting tool. Workers then drag the rope to slowly and accurately lower the outriggers to the clamps and secure them. This requires manual guidance and prevents the outriggers from colliding with the workbench by lowering too quickly. Existing workbench clamps are often designed to accommodate only one type or category of outriggers, making the adjustment process cumbersome and unable to quickly adapt to outriggers and connecting plates of different sizes. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an adjustable welding device for the chassis legs of a semi-trailer. The leg body and the connecting plate are respectively adapted and fixed by a centering clamp and a synchronous distance adjustment device. The maximum clamping force of the synchronous clamp is limited and the leg body is tightened by a material placement and boosting device. The weld position has high accuracy, and the material is changed in rotation, which improves the welding work efficiency.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: An adjustable welding device for a semi-trailer chassis leg, comprising: a rotating motor, the rotating motor is connected to a plurality of synchronous distance adjusting devices equidistantly distributed along the circumferential direction, the synchronous distance adjusting device is used to guide the downward movement direction of the leg body and limit the position of the longitudinal axis of the leg body, the bottom end of each of the synchronous distance adjusting devices is abutted against a material placing and pressurizing device, the material placing and pressurizing device is used to limit the downward movement height of the leg body and complete the clamping of the leg body, the workstation is divided into a processing station and a plurality of stations to be positioned, each of the synchronous distance adjusting devices is arranged on a workstation, the processing station is provided with a centering clamp, the centering clamp is used to fix the connecting plate and make the longitudinal symmetry plane of the connecting plate and the longitudinal symmetry plane of the first median plate in the same plane, the longitudinal symmetry plane of the synchronous distance adjusting device and the longitudinal symmetry plane of the second median plate are in the same plane, and the camera is used to capture the overhead image of the first median plate and the second median plate on the processing station.

[0007] Preferably, the centering clamp includes: a first support plate, the first support plate is located directly below the connecting plate, the first support plate is connected to the fixing part of the stepper motor through a horizontal plate, the fixing part of the stepper motor is connected to the second support plate through another horizontal plate, a channel is provided between the first support plate and the second support plate, one side of the second support plate is connected to the first median plate, the rotating part of the stepper motor is threadedly connected to the two first nuts through a bidirectional screw rod, the two first nuts are symmetrically distributed according to the longitudinal symmetry plane of the first median plate, the top of each first nut is connected to a side clamping plate through a connecting block, the connecting block is arranged in the channel, and the spacing between the two side clamping plates is equal to the width of the connecting plate.

[0008] Preferably, the synchronous distance adjustment device includes: a convergence guide plate, which is arranged below the camera, the bottom of each convergence guide plate is connected to a pressure plate through a first vertical plate, the top of one convergence guide plate is connected to a baffle, a second nut is provided on one side of the first vertical plate, the side of the second nut is connected to a first fixing plate, the second nut is threadedly connected to a first threaded rod, and the first threaded rod is in contact with the first vertical plate.

[0009] Preferably, a bottom plate is provided below the convergence guide plate, the upper surface of the bottom plate is connected to a second vertical plate, extension plates are connected to both sides of the bottom plate, end plates are connected to both sides of the bottom plate, the two extension plates are symmetrically distributed along the longitudinal axis of the bottom plate, the two end plates are symmetrically distributed along the longitudinal axis of the bottom plate, one end of the bottom plate is connected to the second median plate, and the bottom of the first fixed plate is connected to the top of the extension plate.

[0010] Preferably, the material feeding and pressurizing device includes: a synchronous splint, the synchronous splint is in contact with the pressure plate, a lifting plate is provided at the bottom of the synchronous splint, the lifting plate is slidably connected to the synchronous splint, and the edges on both sides of the top of the synchronous splint are connected to a synchronous splint, each of the synchronous splints is connected to a pressure cover through a first spring, the pressure cover is slidably connected to a guide rod, one end of the guide rod is connected to the top of the end plate through a second fixed plate, the bottom end of the pressure cover is connected to the fixed pulley through a rope body, and the fixed pulley is connected to the second fixed plate through side plates at both ends.

[0011] Preferably, the side of the synchronous splint close to the leg body and the side of the first vertical plate close to the leg body are located in the same plane, the width of the two first vertical plates is equal to the width of the leg body after adjustment, and the symmetry axis of the two first vertical plates is located in the same straight line as the longitudinal axis of the lifting plate.

[0012] Preferably, the bottom of the four corners of the lifting plate are connected to a second spring, the bottom of each second spring is connected to a third fixing plate, the top of the third fixing plate is provided with a plurality of threaded holes, each threaded hole is arranged on one side of the second spring, the threaded hole is threadedly connected to a second threaded rod, and the top of each second threaded rod is connected to a supporting top plate.

[0013] Preferably, the supporting top plate is an arc-shaped bar, and the upper surfaces of several supporting top plates are all located in the same plane and the plane is parallel to the bottom of the lifting plate. Several supporting top plates form a main plate, which is used to support the lifting plate and limit the falling height of the lifting plate.

[0014] Preferably, the baffle and the convergence guide plate form an S-shaped plate, the baffle is bent in the direction away from the leg body, the convergence guide plate gradually shrinks in the vertical direction, and the distance at the top of the convergence guide plate is greater than the distance at the bottom of the convergence guide plate.

[0015] A method for welding a semi-trailer chassis leg comprises adjustable welding equipment for the semi-trailer chassis leg, respectively adjusting a centering clamp and a synchronous distance adjusting device, two side splints fixing a connecting plate, two first vertical plates driving a synchronous splint and making the spacing between the two synchronous splints adapted to the width of the leg body, when hoisting the leg body, a baffle performs blocking and limiting, a convergence guide plate restricts the moving direction of the leg body, cooperates with the positioning of the first vertical plate, so that the longitudinal axis plane of the leg body is close to and coincides with the longitudinal axis plane of the second center plate, the leg body presses down the lifting plate, and the downward moving lifting plate simultaneously pulls the The rope body and the length of the rope body are constant, the pressure cover moves toward the direction close to the leg body, the first spring is compressed, the first spring squeezes the synchronous splint, and the pressure between the synchronous splint and the side of the leg body increases. As the lifting plate moves, the second spring is compressed and cushions the impact force of the lifting plate moving downward. When the lifting plate contacts the supporting top plate, the pressure between the synchronous splint and the side of the leg body is 200-1000N. The stepper motor carries several synchronous distance adjustment devices and material placement and boosting devices to replace between the processing position and the position to be positioned. The fixed leg body can be directly sent to the processing position for welding.

[0016] Beneficial Effects: The present invention provides an adjustable welding device for a semi-trailer chassis leg. Compared with the prior art, it has the following beneficial effects: 1. The leg and connecting plate are respectively adapted and fixed by a centering clamp and a synchronous distance adjustment device. The maximum clamping force of the synchronous clamp is limited by a material placement and pressure boosting device to tighten the leg. The first and second median plates are used to measure the alignment of the leg and connecting plate, ensuring the accuracy of the weld position. The welded part and the part to be welded (the unwelded leg) can be rotated between the processing position and the position to be positioned, eliminating the need to remove the welded part and install and fix the part to be welded. This shortens the time difference between two adjacent welds and improves welding efficiency.

[0017] 2. The supporting top plate forms the main plate. The greater the distance between the top of the main plate and the lifting plate, the greater the downward movement of the lifting plate, the greater the compressible distance of the first spring, the greater the final pressure of the first spring, and the greater the pressure of the synchronous splint on the side of the leg. During the welding process, in order to offset the horizontal welding force of different legs and avoid extrusion damage caused by excessive clamping force, the pressure of the synchronous splint on the side of the leg must also be adjusted.

[0018] 3. When the first spring is compressed, it can serve as a power source for the pressure of the synchronous splint. When the first spring is extended or retracted, it can serve as a power source for the synchronous splint and the pressure plate to move outward. The pressure plate can not only drive the two synchronous splints closer at the same time, but also cooperate with the first threaded rod to limit the outward movement of the synchronous splint.

[0019] 4. The lifting plate pulls the ropes on both sides at the same time. Due to the fixed length of the rope, the gland can only move toward the leg under the traction of the rope. The first spring is compressed and squeezes the synchronous splint. The pressure between the synchronous splint and the side of the leg increases. As the lifting plate moves, the second spring is compressed and cushions the impact of the lifting plate moving downward. When the lifting plate contacts the supporting top plate, the pressure between the synchronous splint and the side of the leg is 200-1000N, ensuring that the leg is clamped to prevent the leg from moving under the action of the horizontal welding force.

[0020] 5. Use a camera to capture the top view of the first median plate and the second median plate and transmit it to the database. If the similarity threshold between the first median plate and the second median plate is lower than 0.97, it is considered that the first median plate and the second median plate do not overlap, and there is a deviation between the two. Correction is required in time and inspection is performed before welding to avoid the production of products that do not meet the requirements and improve the quality of the finished welded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a structural diagram of the camera, the first middle plate, the second middle plate, and the rotating plate.

[0025] Figure 3 Schematic diagram of the structure of the centering fixture and the leg body.

[0026] Figure 4 This is a structural diagram of the centering fixture.

[0027] Figure 5 This is a schematic diagram of the structure of the centering fixture after removing the stepper motor.

[0028] Figure 6 This is a separate diagram of the part where the legs and the base are located.

[0029] Figure 7 It is a structural schematic diagram of the convergence guide plate, the first vertical plate, the pressure plate and the synchronous clamping plate.

[0030] Figure 8 This is a structural diagram of the synchronous distance adjustment device, material placement and pressurization device, and the base plate.

[0031] Figure 9 This is a structural diagram of the synchronous distance adjustment device.

[0032] Figure 10 It is a structural diagram of the material charging and pressurizing device.

[0033] Figure 11 It is a structural diagram of the lifting plate, the second spring, and the supporting top plate.

[0034] Figure 12 It is a structural schematic diagram of the third fixed plate, the second threaded rod, the supporting top plate, and the second spring.

[0035] The reference numerals in the figure are: 11, rotating motor; 12, rotating plate; 2, camera; 3, centering fixture; 31, first support plate; 32, side clamp; 33, second support plate; 34, stepping motor; 35, bidirectional screw; 36, first nut; 37, connecting block; 38, first center plate; 39, horizontal plate; 41, leg body; 42, connecting plate; 5, synchronous distance adjustment device; 51, baffle; 52, convergence guide plate; 53, first vertical plate; 54, pressure plate; 55, first Threaded rod; 56, second nut; 57, first fixed plate; 6, material loading and pressurizing device; 61, synchronous splint; 62, second fixed plate; 63, side plate; 64, lifting plate; 65, first spring; 66, guide rod; 67, pressure cover; 68, fixed pulley; 69, rope body; 71, bottom plate; 72, second vertical plate; 73, extension plate; 74, end plate; 75, second middle plate; 81, third fixed plate; 82, second threaded rod; 83, support top plate; 84, second spring.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] like Figure 1 - Figure 12 As shown, an embodiment of the present invention provides an adjustable welding device for a semi-trailer chassis leg, comprising: a rotating motor 11, the rotating motor 11 is connected to a plurality of synchronous distance adjusting devices 5 equidistantly distributed along the circumferential direction, the synchronous distance adjusting device 5 is used to guide the downward movement direction of the leg body 41 and limit the position of the longitudinal axis of the leg body 41, the bottom end of each synchronous distance adjusting device 5 is abutted against a material placing and pressurizing device 6, the material placing and pressurizing device 6 is used to limit the downward movement height of the leg body 41 and complete the clamping of the leg body 41, the workstation is divided into a processing station and a plurality of positions to be positioned, each synchronous distance adjusting device 5 is arranged on a workstation, the processing station is provided with a centering fixture 3, the centering fixture 3 is used to fix the connecting plate 42 and make the longitudinal symmetry plane of the connecting plate 42 and the longitudinal symmetry plane of the first median plate 38 in the same plane, the longitudinal symmetry plane of the synchronous distance adjusting device 5 and the longitudinal symmetry plane of the second median plate 75 in the same plane, and the camera 2 is used to capture a top view image of the first median plate 38 and the second median plate 75 on the processing station.

[0039] The centering fixture 3 includes: a first support plate 31, which is located directly below the connecting plate 42. The first support plate 31 is connected to the fixed part of the stepper motor 34 through a horizontal plate 39, and the fixed part of the stepper motor 34 is connected to the second support plate 33 through another horizontal plate 39. A channel is provided between the first support plate 31 and the second support plate 33, and one side of the second support plate 33 is connected to the first median plate 38. The rotating part of the stepper motor 34 is threadedly connected to the two first nuts 36 through a bidirectional screw rod 35. The two first nuts 36 are symmetrically distributed according to the longitudinal symmetry plane of the first median plate 38. The top of each first nut 36 is connected to the side clamping plate 32 through a connecting block 37. The connecting block 37 is arranged in the channel, and the spacing between the two side clamping plates 32 is equal to the width of the connecting plate 42.

[0040] The synchronous distance adjustment device 5 includes: a convergence guide plate 52, which is arranged below the camera 2. The bottom of each convergence guide plate 52 is connected to a pressure plate 54 through a first vertical plate 53. The top of a convergence guide plate 52 is connected to a baffle 51. A second nut 56 is provided on one side of the first vertical plate 53. The side of the second nut 56 is connected to a first fixing plate 57. The second nut 56 is threadedly connected to a first threaded rod 55, and the first threaded rod 55 is in contact with the first vertical plate 53.

[0041] A bottom plate 71 is provided below the convergence guide plate 52, and the upper surface of the bottom plate 71 is connected to a second vertical plate 72, and both sides of the bottom plate 71 are connected to extension plates 73, and both sides of the bottom plate 71 are connected to end plates 74. The two extension plates 73 are symmetrically distributed along the longitudinal axis of the bottom plate 71, and the two end plates 74 are symmetrically distributed along the longitudinal axis of the bottom plate 71. One end of the bottom plate 71 is connected to the second median plate 75, and the bottom of the first fixed plate 57 is connected to the top of the extension plate 73.

[0042] The material feeding and pressurizing device 6 includes: a synchronous splint 61, the synchronous splint 61 is in contact with the pressure plate 54, a lifting plate 64 is provided at the bottom of the synchronous splint 61, the lifting plate 64 is slidably connected to the synchronous splint 61, and the edges on both sides of the top of the synchronous splint 61 are connected to a synchronous splint 61, each synchronous splint 61 is connected to a pressure cover 67 through a first spring 65, and the pressure cover 67 is slidably connected to a guide rod 66, one end of the guide rod 66 is connected to the top of the end plate 74 through the second fixed plate 62, and the bottom end of the pressure cover 67 is connected to the fixed pulley 68 through a rope body 69, and the fixed pulley 68 is connected to the second fixed plate 62 through the side plates 63 at both ends.

[0043] The side of the synchronous splint 61 close to the leg body 41 and the side of the first vertical plate 53 close to the leg body 41 are located in the same plane. The width of the two first vertical plates 53 is equal to the width of the leg body 41 after adjustment. The symmetry axis of the two first vertical plates 53 and the longitudinal axis of the lifting plate 64 are located in the same straight line.

[0044] The bottom of the four corners of the lifting plate 64 are connected to the second spring 84, and the bottom of each second spring 84 is connected to the third fixing plate 81. The top of the third fixing plate 81 is provided with several threaded holes, each threaded hole is set on one side of the second spring 84, and the threaded hole is threadedly connected to the second threaded rod 82, and the top of each second threaded rod 82 is connected to the support top plate 83.

[0045] The support top plate 83 is an arc-shaped bar. The upper surfaces of several support top plates 83 are all located in the same plane and the plane is parallel to the bottom of the lifting plate 64. Several support top plates 83 form a total plate, which is used to support the lifting plate 64 and limit the falling height of the lifting plate 64.

[0046] The baffle 51 and the convergence guide plate 52 form an S-shaped plate. The baffle 51 bends in the direction away from the leg body 41, and the convergence guide plate 52 gradually shrinks in the vertical direction. The distance at the top of the convergence guide plate 52 is greater than the distance at the bottom of the convergence guide plate 52.

[0047] A method for welding a semi-trailer chassis leg includes adjustable welding equipment for a semi-trailer chassis leg, respectively adjusting a centering clamp 3 and a synchronous distance adjustment device 5, two side splints 32 fixing a connecting plate 42, two first vertical plates 53 driving a synchronous splint 61 and adapting the spacing between the two synchronous splints 61 to the width of the leg body 41, when hoisting the leg body 41, a baffle 51 blocks and limits the position, a convergence guide plate 52 limits the moving direction of the leg body 41, and cooperates with the positioning of the first vertical plate 53 to make the longitudinal axis plane of the leg body 41 close to and coincide with the longitudinal axis plane of the second center plate 75, the leg body 41 presses down the lifting plate 64, and the downwardly moving lifting plate 64 simultaneously pulls the rope bodies on both sides. 69. The length of the rope body 69 is constant, the pressure cover 67 moves toward the direction close to the leg body 41, the first spring 65 is compressed, the first spring 65 squeezes the synchronous splint 61, and the pressure on the side of the synchronous splint 61 and the leg body 41 increases. As the lifting plate 64 moves, the second spring 84 is compressed and buffers the impact force of the lifting plate 64 moving downward. When the lifting plate 64 contacts the supporting top plate 83, the pressure on the side of the synchronous splint 61 and the leg body 41 is 200-1000N. The stepper motor 34 carries several synchronous distance adjustment devices 5 and the material placing and boosting device 6 to be replaced in the processing position and the position to be positioned, and the fixed leg body 41 can be directly sent to the processing position and welded.

[0048] During use, determine the model of the leg body 41 and the connecting plate 42, start the stepper motor 34, and the rotating end of the stepper motor 34 rotates with the bidirectional screw 35. The two first nuts 36 simultaneously drive the splints, and the two side splints 32 move synchronously along the axis of the wire drum, so that the spacing between the two side splints 32 is the same as the width of the connecting plate 42, and the distance between the two side splints 32 and the longitudinal symmetry plane of the first median plate 38 is the same, ensuring that the longitudinal axis of the connecting plate 42 placed between the two side splints 32 is located on the longitudinal symmetry plane of the first median plate 38. Before moving the first vertical plate 53, the longitudinal symmetry plane of the two first vertical plates 53 and the longitudinal symmetry plane of the second median plate 75 must be in the same plane. This can be measured with an instrument. If they are not in the same plane, they need to be fine-tuned in time. Twist all the first threaded rods 55, and each first threaded rod 55 must be twisted the same number of times. The threaded rods move horizontally, and the two first vertical plates 53 must all be away from the second median plate 75 or all be close to the second median plate 75. As the threaded rod moves toward the second center plate 75, it sequentially pushes the first vertical plate 53, the convergence guide plate 52, the baffle 51, the pressure plate 54, and the synchronous clamping plate 61, causing the first spring 65 to stretch, causing the spacing between the two first vertical plates 53 to be the same as the width of the leg 41. Because the side of the first vertical plate 53 closest to the leg 41 and the side of the synchronous clamping plate 61 closest to the leg 41 are coplanar, the spacing between the two synchronous clamping plates 61 is also coplanar with the width of the leg 41, ensuring that the longitudinal symmetry plane of the leg 41 that enters between the two first vertical plates 53 or the two synchronous clamping plates 61 is also coplanar with the longitudinal symmetry plane of the second center plate 75. When the threaded rod moves in the direction away from the second center plate 75, the threaded rod moves away from the first vertical plate 53, the first spring 65 recovers, and the first spring 65 moves the synchronous clamping plate 61 in the direction away from the second center plate 75. The synchronous clamping plate 61 drives the pressure plate 54, the first vertical plate 53, the convergence guide plate 52, and the baffle 51 to move in turn, and the first vertical plate 53 approaches and abuts against the threaded rod.

[0049] When the first spring 65 is compressed, it can serve as a power source for the pressure of the synchronous splint 61. When the first spring 65 is extended or contracted, it can serve as a power source for the outward movement of the synchronous splint 61 and the pressure plate 54. The pressure plate 54 can not only drive the two synchronous splints 61 to approach each other at the same time, but also cooperate with the first threaded rod 55 to limit the outward movement of the synchronous splint 61.

[0050] By twisting all the second threaded rods 82, all the support top plates 83 rise or fall the same distance, and the tops of all the moving support top plates 83 are located in the same plane, and this plane is parallel to the bottom of the lifting plate 64. The support top plates 83 form a main plate. The greater the distance between the top of the main plate and the lifting plate 64, the greater the distance the lifting plate 64 can move downward, the greater the compressible distance of the first spring 65, the greater the final pressure of the first spring 65, and the greater the pressure of the synchronous splint 61 on the side of the leg body 41. During the welding process, in order to offset the horizontal welding force of different leg bodies 41 and avoid extrusion damage caused by excessive clamping force, the pressure of the synchronous splint 61 on the side of the leg body 41 must also be adjusted. In processes such as manual arc welding and carbon dioxide gas shielded welding, the horizontal arc thrust is approximately 200-1000N. It mainly depends on the current: about 200N at 100A and about 800N at 300A. Therefore, the pressure between the synchronous clamping plate 61 and the side of the leg body 41 is set to 200-1000N, which can be adjusted according to the actual welding situation.

[0051] After the adjustment is completed, place the connecting plate 42 into the two side clamps 32 of the processing position. Tie up the leg body 41 and lift it. When the leg body 41 is at the highest height, the leg body 41 is facing the baffle 51. Move the leg body 41 horizontally. After the leg body 41 contacts the baffle 51, stop moving horizontally. Then slowly move the leg body 41 down along the convergence guide plate 52. The leg body 41 slides along the arc surface of the convergence guide plate 52. During the sliding process, the movement trajectory of the leg body 41 gradually converges toward the center. The longitudinal symmetry plane of the leg body 41 approaches the longitudinal symmetry plane of the second median plate 75. When the leg body 41 enters the channel between the two first vertical plates 53, the longitudinal symmetry plane of the leg body 41 is located in the same plane as the longitudinal symmetry plane of the second median plate 75. The leg body 41 contacts and squeezes the lifting plate 64, the lifting plate 64 moves downward in the vertical direction, the second spring 84 is compressed, and the lifting plate 64 pulls the rope bodies 69 on both sides at the same time, and the rope bodies 69 slide along the fixed pulley 68. Since the length of the rope body 69 is fixed, the pressure cover 67 can only slide along the axial direction of the guide rod 66. The length of the rope 69 between the fixed pulley 68 and the lifting plate 64 increases, and the length of the rope 69 between the fixed pulley 68 and the pressure cover 67 decreases. The pressure cover 67 can only move toward the direction close to the leg body 41 under the traction of the rope 69. The first spring 65 is compressed, and the first spring 65 squeezes the synchronous splint 61. The pressure on the side of the synchronous splint 61 and the leg body 41 increases. As the lifting plate 64 moves, the second spring 84 is compressed and buffers the impact force of the lifting plate 64 moving downward. When the lifting plate 64 contacts the support top plate 83, the pressure on the side of the synchronous splint 61 and the leg body 41 is 200-1000N, ensuring that the leg body 41 is clamped to prevent the leg body 41 from moving under the action of the horizontal welding force.

[0052] After the leg body 41 is welded to the connecting plate 42, the rotating motor 11 is started. The rotating end of the rotating motor 11 rotates with the rotating plate 12, the synchronous distance adjustment device 5, and the material placing and pressurizing device 6. The processing position and the raw material to be positioned are exchanged, and the unwelded and fixed leg body 41 is moved to the processing position. If the total number of processing positions and positions to be positioned is 2, it is rotated 180°. If the total number of processing positions and positions to be positioned is 3, it is rotated 90°. The rotation angle is 360° / total number of positions. After stopping the rotation, the top view of the first center plate 38 and the second center plate 75 is captured by the camera 2 and transmitted to the database. In Web development, it can be viewed through HTML<inputtype="file"> The element uses JavaScript's File API to read image files captured by the camera and convert them into binary data. The backend uses a corresponding programming language and framework (such as Python's Flask or Django) to receive the binary data transmitted by the frontend. The binary data is then stored in a BinaryLargeObject field in the database using SQL statements or an ORM tool. Once stored, the database returns a unique identifier that can be used for subsequent operations on the image. First, use the Python PIL library to load the two images to be compared and perform preprocessing, such as resizing and converting to grayscale. The image features are then calculated, often using a histogram to represent them. Finally, a similarity algorithm, such as cosine similarity, is used to compare the two images. A set similarity threshold is used to determine whether the two images overlap. The closer the similarity is to 1, the more similar the two images are. If the similarity exceeds the threshold, the images are considered overlapped.

[0053] If the similarity threshold between the first median plate 38 and the second median plate 75 is lower than 0.97, it is considered that the first median plate 38 and the second median plate 75 do not overlap, and a deviation has occurred between the two, which needs to be corrected in time to ensure the accuracy of welding.

[0054] The leg body 41 and the connecting plate 42 are adapted and fixed respectively by the centering clamp 3 and the synchronous distance adjustment device 5, the maximum clamping force of the synchronous clamp 61 is limited and the leg body 41 is tightened by the material placing and pressurizing device 6, and the first median plate 38 and the second median plate 75 are used to measure whether the leg body 41 and the connecting plate 42 are aligned to ensure the accuracy of the weld position, so that the welded parts and the parts to be welded (unwelded leg bodies 41) can be rotated between the processing position and the positioning position without removing the welded parts and installing and fixing the parts to be welded, thereby shortening the time difference between two adjacent welds and improving the welding work efficiency.

[0055] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. While specific details are described in detail in the preferred embodiments of the present invention to provide a thorough understanding of the present invention, those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An adjustable welding device for semi-trailer chassis legs, characterized in that: include: A rotating motor (11) is connected to a plurality of synchronous distance adjusting devices (5) distributed equidistantly along the circumferential direction, the synchronous distance adjusting devices (5) are used to guide the downward movement direction of the leg body (41) and limit the position of the longitudinal axis of the leg body (41), the bottom end of each synchronous distance adjusting device (5) is abutted against a material placing and pressurizing device (6), the material placing and pressurizing device (6) is used to limit the downward movement height of the leg body (41) and complete the clamping of the leg body (41), the workstation is divided into a processing station and a plurality of waiting positions, each Each of the synchronous distance adjusting devices (5) is arranged on a workstation, and a centering fixture (3) is provided at the processing station. The centering fixture (3) is used to fix the connecting plate (42) and make the longitudinal symmetry plane of the connecting plate (42) and the longitudinal symmetry plane of the first median plate (38) be located in the same plane. The longitudinal symmetry plane of the synchronous distance adjusting device (5) and the longitudinal symmetry plane of the second median plate (75) are located in the same plane. The camera (2) is used to capture a top view image of the first median plate (38) and the second median plate (75) at the processing station.

2. The adjustable welding equipment for semi-trailer chassis legs according to claim 1, characterized in that: The centering fixture (3) comprises: a first support plate (31), the first support plate (31) being located directly below the connecting plate (42), the first support plate (31) being connected to a fixed portion of a stepping motor (34) via a transverse plate (39), the fixed portion of the stepping motor (34) being connected to a second support plate (33) via another transverse plate (39), a channel being provided between the first support plate (31) and the second support plate (33), and a side of the second support plate (33) The stepper motor (34) is connected to the first median plate (38), and the rotating part of the stepper motor (34) is threadedly connected to the two first nuts (36) through a bidirectional screw rod (35). The two first nuts (36) are symmetrically distributed according to the longitudinal symmetry plane of the first median plate (38). The top of each first nut (36) is connected to a side clamping plate (32) through a connecting block (37). The connecting block (37) is set in the channel, and the spacing between the two side clamping plates (32) is equal to the width of the connecting plate (42).

3. The adjustable welding equipment for semi-trailer chassis legs according to claim 1, characterized in that: The synchronous distance adjustment device (5) comprises: a convergence guide plate (52), the convergence guide plate (52) is arranged below the camera (2), the bottom of each convergence guide plate (52) is connected to a pressure plate (54) through a first vertical plate (53), the top of one convergence guide plate (52) is connected to a baffle (51), a second nut (56) is provided on one side of the first vertical plate (53), a side of the second nut (56) is connected to a first fixing plate (57), the second nut (56) is threadedly connected to a first threaded rod (55), and the first threaded rod (55) is in contact with the first vertical plate (53).

4. The adjustable welding equipment for semi-trailer chassis legs according to claim 3, characterized in that: A bottom plate (71) is provided below the convergence guide plate (52), the upper surface of the bottom plate (71) is connected to a second vertical plate (72), both sides of the bottom plate (71) are connected to extension plates (73), both sides of the bottom plate (71) are connected to end plates (74), the two extension plates (73) are symmetrically distributed along the longitudinal axis of the bottom plate (71), the two end plates (74) are symmetrically distributed along the longitudinal axis of the bottom plate (71), one end of the bottom plate (71) is connected to the second middle plate (75), and the bottom of the first fixed plate (57) is connected to the top of the extension plate (73).

5. The adjustable welding equipment for semi-trailer chassis legs according to claim 1, characterized in that: The material loading and pressurizing device (6) comprises: a synchronous splint (61), the synchronous splint (61) is in contact with the pressure plate (54), a lifting plate (64) is provided at the bottom of the synchronous splint (61), the lifting plate (64) is slidably connected to the synchronous splint (61), the edges on both sides of the top of the synchronous splint (61) are connected to a synchronous splint (61), each of the synchronous splints (61) is connected to a pressure cover (67) through a first spring (65), the pressure cover (67) is slidably connected to a guide rod (66), one end of the guide rod (66) is connected to the top of the end plate (74) through the second fixed plate (62), the bottom end of the pressure cover (67) is connected to the fixed pulley (68) through a rope body (69), and the fixed pulley (68) is connected to the second fixed plate (62) through side plates (63) at both ends.

6. The adjustable welding equipment for semi-trailer chassis legs according to claim 5, characterized in that: The side of the synchronous splint (61) close to the leg body (41) and the side of the first vertical plate (53) close to the leg body (41) are located in the same plane, the width of the two first vertical plates (53) is equal to the width of the leg body (41) after adjustment, and the symmetry axes of the two first vertical plates (53) and the longitudinal axis of the lifting plate (64) are located in the same straight line.

7. The adjustable welding equipment for semi-trailer chassis legs according to claim 5, characterized in that: The bottoms of the four corners of the lifting plate (64) are connected to second springs (84), the bottom of each second spring (84) is connected to a third fixing plate (81), the top of the third fixing plate (81) is provided with a plurality of threaded holes, each threaded hole is arranged on one side of the second spring (84), the threaded holes are threadedly connected to a second threaded rod (82), and the top of each second threaded rod (82) is connected to a supporting top plate (83).

8. The adjustable welding equipment for semi-trailer chassis legs according to claim 7, characterized in that: The supporting top plate (83) is an arc-shaped strip. The upper surfaces of several supporting top plates (83) are all located in the same plane and the plane is parallel to the bottom of the lifting plate (64). Several supporting top plates (83) form a total plate, which is used to support the lifting plate (64) and limit the falling height of the lifting plate (64).

9. The adjustable welding equipment for semi-trailer chassis legs according to claim 3, characterized in that: The baffle (51) and the convergence guide plate (52) form an S-shaped plate, the baffle (51) bends in a direction away from the leg body (41), the convergence guide plate (52) gradually shrinks in a vertical direction, and the distance at the top of the convergence guide plate (52) is greater than the distance at the bottom of the convergence guide plate (52).

10. A method for welding a semi-trailer chassis leg, comprising the adjustable welding device for a semi-trailer chassis leg according to any one of claims 1 to 9, characterized in that: The centering clamp (3) and the synchronous distance adjustment device (5) are adjusted respectively, the two side clamps (32) fix the connecting plate (42), the spacing between the two synchronous clamps (61) is adapted to the width of the leg body (41), when the leg body (41) is hoisted, the baffle (51) is blocked and limited, the convergence guide plate (52) limits the moving direction of the leg body (41), and the positioning of the first vertical plate (53) is coordinated to make the longitudinal axis of the leg body (41) close to and coincide with the longitudinal axis of the second median plate (75), the leg body (41) presses down the lifting plate (64), and the lowered lifting plate (64) simultaneously pulls the rope bodies (69) on both sides, the length of the rope body (69) is constant, and the pressure cover (67) moves toward the leg body. The first spring (65) is compressed and squeezes the synchronous splint (61). The pressure on the side of the synchronous splint (61) and the leg body (41) increases. As the lifting plate (64) moves, the second spring (84) is compressed and buffers the impact force of the lifting plate (64) moving downward. When the lifting plate (64) contacts the supporting top plate (83), the pressure on the side of the synchronous splint (61) and the leg body (41) is 200-1000N. The stepper motor (34) carries a number of synchronous distance adjustment devices (5) and a material placing and pressurizing device (6) to be replaced in the processing position and the position to be positioned, and directly sends the fixed leg body (41) directly into the processing position and welds it.

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