Automatic welding equipment for longitudinal beam of semitrailer

Abstract

The invention discloses automatic welding equipment for a longitudinal beam of a semitrailer, and relates to the field of automobile part manufacturing, the automatic welding equipment for the longitudinal beam of the semitrailer comprises two electric sliding rails and a self-adaptive flat welding structure used for welding a longitudinal beam main body, the tops of the two electric sliding rails are slidably connected with a rack, and the rack is connected with a welding platform; the self-adaptive flat welding structure comprises a rack, a hand climbing frame is fixedly connected to the side face of the rack, longitudinal sliding rails are fixedly connected to the positions, close to the two sides, of the interior of the rack, longitudinal electric sliding blocks are slidably connected to the interiors of the two longitudinal sliding rails, and connecting blocks are fixedly connected to the sides, close to each other, of the two longitudinal electric sliding blocks; and two sliding rods are fixedly connected between the two connecting blocks. By arranging the self-adaptive flat welding structure, the welding gun can track the position of a welding seam in real time, the shape deviation of the longitudinal beam is automatically compensated, it is guaranteed that the welding track is accurately aligned all the time and is not affected by the shape of the longitudinal beam body, the welding adaptability of equipment is improved, and different longitudinal beam bodies can be welded.

Description

Technical Field

[0001] The invention relates to the field of automobile parts manufacturing, and in particular to automatic welding equipment for a longitudinal beam of a semitrailer. Background Art

[0002] Semi-trailer longitudinal beam welding equipment is used to achieve efficient and accurate welding of longitudinal beams. Common types include gantry type welding equipment, which has the advantages of good rigidity and strong stability, and can stably weld the long straight welds of longitudinal beams. Cantilever type welding equipment has good flexibility, can adapt to the welding of longitudinal beams of different specifications, and is easy to operate.

[0003] Longitudinal beams have various shapes. Existing welding equipment mostly uses fixed tracks or rigid fixtures. It is difficult to dynamically adjust the position of the welding gun according to the size of the longitudinal beam, resulting in problems such as weld offset and leaking welds. Frequent manual calibration is required, which is inefficient. Manual welding relies on operator experience and is easily affected by factors such as fatigue and visual angle limitation. The weld quality fluctuates greatly. When fixed equipment continuously welds long welds, the welding gun may deviate from the preset trajectory due to thermal deformation or mechanical vibration of the longitudinal beam, and repeated re-welding is required, which increases costs and working hours. Existing equipment lacks adaptive tracking and cleaning functions. The surface oxide layer of the weld needs to be manually cleaned before welding, and the weld scar needs to be polished after welding, which is a cumbersome process. During the welding process, if the position of the longitudinal beam is offset (such as lifting error), the equipment cannot correct the welding gun posture in real time, resulting in an increase in the scrap rate. The welding of large longitudinal beams requires multi-station collaborative operation. Traditional equipment is difficult to move and is difficult to adapt to high altitudes, narrow spaces and other scenes. In addition, the longitudinal beams vary greatly in size, and the existing welding platforms have low versatility. Customized fixtures and tracks need to be made for different models, and the initial investment cost is high. During manual welding, workers need to be in close contact with high-temperature welding points and moving parts, which poses a risk of burns and mechanical collisions. If the automated equipment lacks flexible adjustment capabilities, it is easy to damage the workpiece surface due to rigid contact, restricting production efficiency and safety. Summary of the invention

[0004] The main purpose of the present invention is to provide an automatic welding device for a semitrailer longitudinal beam, which can effectively solve the technical problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An automatic welding device for a longitudinal beam of a semitrailer comprises two electric slide rails and an adaptive flat welding structure for welding a longitudinal beam body, the tops of the two electric slide rails are slidably connected to a platform, the sides of the platform are fixedly connected to a climbing scaffold, the inside of the platform is fixedly connected to longitudinal slide rails on both sides, the insides of the two longitudinal slide rails are slidably connected to longitudinal electric sliders, and the adjacent sides of the two longitudinal electric sliders are fixedly connected to connecting blocks;

[0007] The adaptive flat welding structure includes two sliding frames, two sliding rods are fixedly connected to the two connecting blocks in front, and two pairs of transverse electric sliding blocks are symmetrically slidably connected to the outer surfaces of the two sliding rods. The tops of the two sliding frames are respectively fixedly connected to the bottoms of the two pairs of transverse electric sliding blocks, and the interiors of the two sliding frames are provided with sliding grooves running through the bottoms. The bottoms of the two sliding frames and the rears of the sliding grooves are fixedly connected with welding guns, the top of the stand is fixedly connected with a fuel tank, the bottom of the fuel tank runs through the top of the stand and is fixedly connected to the two welding guns with a fuel pipe, the interior of the sliding groove is symmetrically slidably connected with two sliding blocks, the interior of the sliding groove and running through the two sliding blocks are fixedly connected with two fixed rods, the opposite sides of the two sliding blocks are fixedly connected to the outer surfaces of the fixed rods between the sliding grooves and fixedly connected with springs, the bottoms of the two sliding blocks run through the bottom of the sliding frame and are rotatably connected with longitudinal rods, and the bottom of the longitudinal rod is fixedly connected with an extrusion wheel.

[0008] As a further solution of the present invention, the two extrusion wheels located at the bottom of the same sliding frame are respectively extruded with the inner side and the outer side of the longitudinal beam body, and the output end of the welding gun is aligned with the weld of the longitudinal beam body.

[0009] As a further solution of the present invention, two vertical frames are arranged between the two electric slide rails and inside the stand, and the longitudinal beam body is located on top of the two vertical frames.

[0010] As a further solution of the present invention, a plurality of vertical blocks are fixedly connected at equal intervals on the tops of the two vertical frames, a roller is rotatably connected between the two symmetrical vertical blocks, a single-phase motor is fixedly connected to the side of the vertical block at the front of one side, the output shaft of the single-phase motor passes through the vertical block at the front of one side and is fixedly connected to the roller at the front, and the side surfaces of all the vertical blocks on the other side are rotatably connected with transmission gears, gear belts are meshed with each other among all the transmission gears, and the transmission gears are fixedly connected to the rollers.

[0011] As a further solution of the present invention, fixed blocks are fixedly connected to the rear parts of the tops of the two uprights, a baffle is rotatably connected between the two fixed blocks, asynchronous motors are fixedly connected to the opposite sides of the two fixed blocks, and the output shafts of the two asynchronous motors respectively pass through the two fixed blocks and are fixedly connected to the two sides of the baffle.

[0012] As a further solution of the present invention, a plurality of positioning clamping structures are arranged at intervals between the tops of the two upright frames and the rotating rollers, the positioning clamping structures include positioning frames, the interiors of the positioning frames are provided with placement grooves, the interiors of the placement grooves are slidably connected with positioning sliders, the interiors of the positioning frames are provided with through grooves communicating with the placement grooves, the tops of the positioning sliders are provided with left positioning blocks fixedly connected to the tops of the through grooves, the tops of the positioning sliders are fixedly connected to the right positioning blocks on one side of the tops of the positioning frames, the interiors of the placement grooves are fixedly connected with electric push rods, and the output ends of the electric push rods are fixedly connected to one side of the positioning sliders.

[0013] As a further solution of the present invention, the left positioning block and the right positioning block are in contact with two sides of the longitudinal beam body respectively, a plurality of positioning frames are located on the top of the two vertical frames, and a plurality of positioning frames are located between two adjacent rollers respectively.

[0014] As a further solution of the present invention, the front and rear parts of each positioning frame are symmetrically fixedly connected with two ear seats, the top of the ear seat passes through the bottom to open a sliding groove, the top of the sliding groove passes through the bottom and is threadedly connected to the stand frame with a bolt.

[0015] As a further solution of the present invention, the bottom of the two sliding frames and the front part of the slide groove are rotatably connected to a rotating rod, the bottom of the rotating rod is fixedly connected to a brush ball, and the outer surface of the longitudinal rod and the outer surface of the rotating rod are fixedly connected to a connecting gear.

[0016] As a further solution of the present invention, the two connecting gears are meshed with each other, and the brush ball is in contact with the weld of the longitudinal beam body.

[0017] The beneficial effects of the present invention are as follows:

[0018] By setting up an adaptive flat welding structure, a multi-axis motion system consisting of an electric slide rail, a longitudinal electric slide block and a transverse electric slide block, combined with a spring and an extrusion wheel adaptive structure, the welding gun can track the weld position in real time, automatically compensate for the longitudinal beam shape deviation, ensure that the welding track is always accurately aligned, and is not affected by the shape of the longitudinal beam body, thereby increasing the welding adaptability of the equipment and being able to weld different longitudinal beam bodies;

[0019] When the extrusion wheel contacts the longitudinal beam, the sliding block compresses the spring to form a flexible contact pressure, avoiding rigid collision and damaging the workpiece, while maintaining stable fit and improving the welding quality of complex cross-section welds;

[0020] By setting the baffle to match the roller, the roller transmission system is driven by a single-phase motor and synchronously driven by a gear belt to achieve automatic conveying of the longitudinal beam; the baffle and the asynchronous motor are linked to form a physical limit to prevent excessive displacement and ensure the consistency of the welding starting point;

[0021] The linkage control of the baffle and the asynchronous motor prevents the longitudinal beam from over-limiting. Combined with the distribution of multiple positioning clamping points, it reduces the risk of workpiece deviation and the scrap rate caused by positioning errors.

[0022] The brush ball rotates with the extrusion wheel through gear linkage, automatically cleaning the weld area before and after welding, removing the oxide layer and welding slag, reducing impurity interference, improving welding strength and surface quality, and reducing subsequent processing costs;

[0023] The positioning frame is fixed to the vertical frame by bolts, and the bolts can slide in the sliding groove, so that the installation of the positioning frame is not limited by the distance between the two vertical frames;

[0024] A plurality of positioning clamping structures can force the longitudinal beam body to move laterally and fix the position to prevent shaking during welding, and are not affected by the shape of the longitudinal beam body, so there is no need to manually position the longitudinal beam body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an automatic welding device for a longitudinal beam of a semitrailer according to the present invention;

[0026] Figure 2 This is a diagram showing the internal structure of a stand of an automatic welding device for a longitudinal beam of a semitrailer according to the present invention;

[0027] Figure 3 The invention provides an automatic welding device for a longitudinal beam of a semitrailer Figure 2 A magnified view of part A;

[0028] Figure 4 The invention provides an automatic welding device for a longitudinal beam of a semitrailer Figure 2 A magnified view of part B;

[0029] Figure 5 This is a self-adaptive flat welding structure analysis and split diagram of an automatic welding device for a semi-trailer longitudinal beam of the present invention;

[0030] Figure 6 A roller display diagram of an automatic welding device for a longitudinal beam of a semitrailer according to the present invention;

[0031] Figure 7 This is a display diagram of a baffle of an automatic welding device for a longitudinal beam of a semitrailer according to the present invention;

[0032] Figure 8 This is a dissecting diagram of the positioning and clamping structure of an automatic welding device for a longitudinal beam of a semi-trailer according to the present invention;

[0033] Fig. 9 This is a ball brushing display diagram of an automatic welding device for a longitudinal beam of a semi-trailer according to the present invention;

[0034] Fig.10 The invention provides an automatic welding device for a longitudinal beam of a semitrailer Fig. 9 Enlarged view of part C in the middle.

[0035] In the figure: 1. electric slide rail; 2. stand; 3. climbing scaffold; 4. fuel tank; 5. positioning and clamping structure; 6. longitudinal beam body; 7. stand; 8. stand block; 9. roller; 10. single-phase motor; 11. transmission gear; 12. gear belt; 13. longitudinal slide rail; 14. adaptive flat welding structure; 15. longitudinal electric slide block; 16. connecting block; 17. slide rod; 18. transverse electric slide block; 19. slide frame; 20. welding gun; 21. fuel pipe ; 22. longitudinal rod; 23. extrusion wheel; 24. slide groove; 25. sliding block; 26. fixed rod; 27. spring; 28. fixed block; 29. ​​baffle; 30. asynchronous motor; 31. positioning frame; 32. placement groove; 33. positioning slider; 34. through groove; 35. left positioning block; 36. electric push rod; 37. right positioning block; 38. ear seat; 39. sliding groove; 40. bolt; 41. rotating rod; 42. connecting gear; 43. brush ball. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figure 1 - Fig.10 As shown, an automatic welding device for a longitudinal beam of a semitrailer comprises two electric slide rails 1 and an adaptive flat welding structure 14 for welding a longitudinal beam body 6, the tops of the two electric slide rails 1 are slidably connected with a stand 2, the sides of the stand 2 are fixedly connected with a climbing scaffold 3, the inside of the stand 2 is fixedly connected with longitudinal slide rails 13 on both sides, the insides of the two longitudinal slide rails 13 are slidably connected with longitudinal electric sliders 15, and the adjacent sides of the two longitudinal electric sliders 15 are fixedly connected with connecting blocks 16;

[0038] The adaptive flat welding structure 14 includes two sliding frames 19, two sliding rods 17 are fixedly connected to the two connecting blocks 16, and two pairs of transverse electric sliders 18 are symmetrically slidably connected to the outer surfaces of the two sliding rods 17. The tops of the two sliding frames 19 are respectively fixedly connected to the bottoms of the two pairs of transverse electric sliders 18. The interiors of the two sliding frames 19 are provided with sliding grooves 24 running through the bottoms. The bottoms of the two sliding frames 19 and the rear parts of the sliding grooves 24 are fixedly connected to welding guns 20. The top of the stand 2 is fixedly connected to the fuel tank 4, and the bottom of the fuel tank 4 is fixedly connected to the bottom of the fuel tank 4. The top of the platform 2 passes through the top and is fixedly connected to the two welding guns 20 with a fuel pipe 21, the inside of the slide 24 is symmetrically slidably connected to two sliding blocks 25, the inside of the slide 24 and passing through the two sliding blocks 25 are fixedly connected to two fixed rods 26, the sides of the two sliding blocks 25 that are away from each other are fixedly connected to the outer surfaces of the fixed rods 26 with springs 27, the bottoms of the two sliding blocks 25 pass through the bottom of the sliding frame 19 and are rotatably connected to the longitudinal rods 22, and the bottom of the longitudinal rods 22 is fixedly connected to the extrusion wheels 23.

[0039] In the actual operation process, the longitudinal beam body 6 is placed inside the stand 2, and then the two longitudinal electric slide blocks 15 are started, so that the adaptive flat welding structure 14 slides downward along the two longitudinal slide rails 13, and the two transverse electric slide blocks 18 are started at the same time, so that the adaptive flat welding structure 14 slides transversely along the two slide bars 17 until the output ends of the two welding guns 20 are respectively aligned with the welds on both sides of the longitudinal beam body 6. At this time, the two welding guns 20 are started, and the two electric slide rails 1 are started. The two electric slide rails 1 drive the stand 2 to slide forward, and then drive the two welding guns 20 to move forward horizontally, so that the weld of the longitudinal beam body 6 can be flatly welded;

[0040] When the adaptive flat welding structure 14 slides up, down, left and right, the two extrusion wheels 23 located at the bottom of the same sliding frame 19 will be squeezed against the longitudinal top of the longitudinal beam body 6, thereby driving the two extrusion wheels 23 to slide laterally away from each other until the two extrusion wheels 23 are respectively squeezed against the inner and outer sides of the longitudinal beam body 6. During this process, the two sliding blocks 25 slide away from each other along the slide groove 24, thereby driving the four springs 27 to be compressed. When the stand 2 slides forward, the adaptive flat welding structure 14 is driven to slide forward, thereby driving the extrusion wheels 23 to squeeze the side of the longitudinal beam body 6 and slide forward, thereby driving the adaptive flat welding structure 14 to move relative to the side of the longitudinal beam body 6, so that the output end of the welding gun 20 is always aligned with the weld of the longitudinal beam body 6. Therefore, no matter what shape the longitudinal beam body 6 is, the welding gun 20 can always be aligned with the weld of the longitudinal beam body 6.

[0041] In this embodiment, two extrusion wheels 23 located at the bottom of the same sliding frame 19 respectively squeeze the inner side and the outer side of the longitudinal beam body 6 , and the output end of the welding gun 20 is aligned with the welding seam of the longitudinal beam body 6 .

[0042] Two vertical frames 7 are arranged between the two electric slide rails 1 and inside the platform 2 , and the longitudinal beam body 6 is located on the top of the two vertical frames 7 .

[0043] In this embodiment, a plurality of upright blocks 8 are evenly and fixedly connected to the tops of the two upright frames 7, a roller 9 is rotatably connected between the two symmetrical upright blocks 8, a single-phase motor 10 is fixedly connected to the side of the upright block 8 at the front of one side, the output shaft of the single-phase motor 10 passes through the upright block 8 at the front of one side and is fixedly connected to the roller 9 at the front, and the side surfaces of all the upright blocks 8 at the other side are rotatably connected to transmission gears 11, gear belts 12 are meshed with each other among all the transmission gears 11, and the transmission gears 11 are fixedly connected to the roller 9.

[0044] Specifically, the longitudinal beam body 6 is placed on top of several rollers 9, and then the single-phase motor 10 is started to drive the front roller 9 to rotate, and then cooperate with all the transmission gears 11 and the gear belt 12 to drive all the rollers 9 to rotate backward synchronously, so the longitudinal beam body 6 can be automatically driven to move backward until the rear of the longitudinal beam body 6 is located inside the stand 2.

[0045] In this embodiment, the top rear parts of the two upright frames 7 are fixedly connected with fixed blocks 28, a baffle 29 is rotatably connected between the two fixed blocks 28, and the opposite sides of the two fixed blocks 28 are fixedly connected with asynchronous motors 30, and the output shafts of the two asynchronous motors 30 respectively pass through the two fixed blocks 28 and are fixedly connected to the two sides of the baffle 29.

[0046] Specifically, when the single-phase motor 10 is started to drive the roller 9 to rotate, the two asynchronous motors 30 are started, which in turn drives the baffle 29 to rotate forward until the baffle 29 rotates to a vertical state, so that several rollers 9 rotate to drive the longitudinal beam body 6 to slide backward. Due to the obstruction of the baffle 29, the longitudinal beam body 6 will not slide backward excessively, thereby avoiding the problem of affecting the welding quality due to the deviation of the position of the longitudinal beam body 6.

[0047] In this embodiment, a plurality of positioning and clamping structures 5 are arranged at intervals between the tops of the two upright frames 7 and the rotating rollers 9, and the positioning and clamping structures 5 include positioning frames 31, each of which is provided with a placement groove 32, and a positioning slider 33 is slidably connected to the inside of the placement groove 32. A through groove 34 connected to the placement groove 32 is provided through the top of the positioning frame 31, and a left positioning block 35 is fixedly connected to the top of the positioning slider 33 through the through groove 34. A right positioning block 37 is fixedly connected to one side of the top of the positioning frame 31, and an electric push rod 36 is fixedly connected to the inside of the placement groove 32, and the output end of the electric push rod 36 is fixedly connected to one side of the positioning slider 33.

[0048] When the rear part of the longitudinal beam body 6 contacts the front part of the baffle 29, the rearmost end of the weld of the longitudinal beam body 6 is located at the bottom of the welding gun 20. At this time, the longitudinal beam body 6 is forced to move laterally by starting a plurality of positioning and clamping structures 5 until the longitudinal beam body 6 contacts the right positioning block 37, thereby fixing the position of the longitudinal beam body 6 before welding, and preventing the longitudinal beam body 6 from shaking during welding. At the same time, since a plurality of positioning and clamping structures 5 are provided, the positioning and clamping work of the longitudinal beam body 6 is not affected by its shape.

[0049] The operating steps of the positioning and clamping structure 5 are to start the electric push rod 36, drive the positioning slider 33 to slide along the placement groove 32 and toward the right positioning block 37, and then drive the left positioning block 35 to slide along the through groove 34 and toward the right positioning block 37 until the left positioning block 35 is clamped with the side of the longitudinal beam body 6. At this time, the left positioning block 35 continues to slide, which can drive the longitudinal beam body 6 to move horizontally until the longitudinal beam body 6 is clamped by the left positioning block 35 and the right positioning block 37. At this time, the positioning and clamping work of the longitudinal beam body 6 is completed.

[0050] In this embodiment, the left positioning block 35 and the right positioning block 37 are in contact with both sides of the longitudinal beam body 6 respectively, a plurality of positioning frames 31 are located on the top of the two vertical frames 7 , and a plurality of positioning frames 31 are located between two adjacent rollers 9 respectively.

[0051] In this embodiment, the front and rear parts of each positioning frame 31 are symmetrically fixedly connected with two ear seats 38, the top of the ear seat 38 passes through the bottom to open a sliding groove 39, the top of the sliding groove 39 passes through the bottom and is threadedly connected to the stand 7 with a bolt 40.

[0052] Since the bolt 40 can slide along the sliding groove 39 , the distance between the two bolts 40 on the left and right sides is adjustable. Therefore, the positioning frame 31 is fixed to the stand 7 via the bolt 40 and is not limited by the distance between the two stand 7 .

[0053] In this embodiment, the bottom of the two sliding frames 19 and the front part of the slide groove 24 are both rotatably connected to the rotating rod 41, the bottom of the rotating rod 41 is fixedly connected to the brush ball 43, and the outer surface of the longitudinal rod 22 and the outer surface of the rotating rod 41 are both fixedly connected to the connecting gear 42.

[0054] When the stand 2 slides forward and drives the adaptive flat welding structure 14 to slide forward, the extrusion wheel 23 will be driven to slide together and rotate, thereby driving the longitudinal rod 22 to rotate. Therefore, through the mutual engagement of the two connecting gears 42, the rotating rod 41 is driven to rotate, and then the brush ball 43 is driven to rotate together. Therefore, when the adaptive flat welding structure 14 slides forward and drives the brush ball 43 to brush the ball 43 together, the rotation and forward sliding of the brush ball 43 will brush the weld, so that when the welding gun 20 welds, there is no interference from dust and other dirt. When the stand 2 slides backward and resets, it drives the adaptive flat welding structure 14 to slide backward and reset, thereby driving the brush ball 43 to slide and rotate together. At this time, the brush ball 43 will brush the weld that has been welded, thereby removing impurities on the weld scar.

[0055] In this embodiment, the two connecting gears 42 are meshed with each other, and the brush ball 43 is in contact with the weld of the longitudinal beam body 6 .

[0056] It should be noted that the present invention is an automatic welding device for a longitudinal beam of a semi-trailer. When in use, in the actual operation process, the longitudinal beam body 6 is placed inside the stand 2, and then the two longitudinal electric sliders 15 are started, so that the adaptive flat welding structure 14 slides downward along the two longitudinal slide rails 13, and at the same time, the two transverse electric sliders 18 are started, so that the adaptive flat welding structure 14 slides transversely along the two slide bars 17 until the output ends of the two welding guns 20 are respectively aligned with the welds on both sides of the longitudinal beam body 6. At this time, the two welding guns 20 are started, and the two electric slide rails 1 are started. The two electric slide rails 1 drive the stand 2 to slide forward, and then drive the two welding guns 20 to move forward horizontally, so that the weld of the longitudinal beam body 6 can be flatly welded;

[0057] When the adaptive flat welding structure 14 slides up, down, left and right, the two extrusion wheels 23 located at the bottom of the same sliding frame 19 will be squeezed against the longitudinal top of the longitudinal beam body 6, thereby driving the two extrusion wheels 23 to slide away from each other laterally until the two extrusion wheels 23 are respectively squeezed against the inner and outer sides of the longitudinal beam body 6. During this process, the two sliding blocks 25 slide away from each other along the slide groove 24, thereby driving the four springs 27 to be compressed. When the stand 2 slides forward, the adaptive flat welding structure 14 is driven to slide forward, thereby driving the extrusion wheels 23 to squeeze the side of the longitudinal beam body 6 and slide forward, thereby driving the adaptive flat welding structure 14 to move relative to the side of the longitudinal beam body 6, so that the output end of the welding gun 20 is always aligned with the weld of the longitudinal beam body 6. Therefore, no matter what shape the longitudinal beam body 6 is, its welding gun 20 can always be aligned with the weld of the longitudinal beam body 6.

[0058] Two vertical frames 7 are arranged between the two electric slide rails 1 and inside the stand 2, and the longitudinal beam body 6 is located on the top of the two vertical frames 7;

[0059] Specifically, the longitudinal beam body 6 is placed on the top of several rollers 9, and then the single-phase motor 10 is started to drive the rollers 9 at the front to rotate, and then all the transmission gears 11 and the gear belt 12 are coordinated to drive all the rollers 9 to rotate backward synchronously, so the longitudinal beam body 6 can be automatically driven to move backward until the rear of the longitudinal beam body 6 is located inside the stand 2;

[0060] Specifically, when the single-phase motor 10 is started to drive the roller 9 to rotate, the two asynchronous motors 30 are started, and then the baffle 29 is driven to rotate forward until the baffle 29 rotates to a vertical state, so that the rotation of the plurality of rollers 9 drives the longitudinal beam body 6 to slide backward. Due to the obstruction of the baffle 29, the longitudinal beam body 6 will not slide backward in a transitional manner, thereby avoiding the problem of affecting the welding quality due to the deviation of the longitudinal beam body 6 position.

[0061] When the rear part of the longitudinal beam body 6 contacts the front part of the baffle 29, the rearmost end of the weld of the longitudinal beam body 6 is located at the bottom of the welding gun 20. At this time, the longitudinal beam body 6 is forced to move laterally by starting a plurality of positioning and clamping structures 5 until the longitudinal beam body 6 contacts the right positioning block 37, thereby fixing the position of the longitudinal beam body 6 before welding, and preventing the longitudinal beam body 6 from shaking during welding. At the same time, since a plurality of positioning and clamping structures 5 are provided, the positioning and clamping work of the longitudinal beam body 6 is not affected by its shape.

[0062] The operation steps of the positioning and clamping structure 5 are as follows: start the electric push rod 36, drive the positioning slide block 33 to slide along the placement groove 32 and toward the right positioning block 37, and then drive the left positioning block 35 to slide along the through groove 34 and toward the right positioning block 37, until the left positioning block 35 is clamped with the side of the longitudinal beam body 6. At this time, the left positioning block 35 continues to slide, which can drive the longitudinal beam body 6 to move horizontally until the longitudinal beam body 6 is clamped by the left positioning block 35 and the right positioning block 37. At this time, the positioning and clamping work of the longitudinal beam body 6 is completed. Since the bolt 40 can slide along the sliding groove 39, the distance between the left and right bolts 40 is adjustable. Therefore, its positioning frame 31 is fixed to the stand 7 by the bolt 40, and is not limited by the distance between the two stand 7.

[0063] When the stand 2 slides forward and drives the adaptive flat welding structure 14 to slide forward, the extrusion wheel 23 will be driven to slide together and rotate, thereby driving the longitudinal rod 22 to rotate. Therefore, through the mutual engagement of the two connecting gears 42, the rotating rod 41 is driven to rotate, and then the brush ball 43 is driven to rotate together. Therefore, when the adaptive flat welding structure 14 slides forward and drives the brush ball 43 to brush the ball 43 together, the rotation and forward sliding of the brush ball 43 will brush the weld, so that when the welding gun 20 welds, there is no interference from dust and other dirt. When the stand 2 slides backward and resets, it drives the adaptive flat welding structure 14 to slide backward and reset, thereby driving the brush ball 43 to slide and rotate together. At this time, the brush ball 43 will brush the weld that has been welded, thereby removing impurities on the weld scar.

[0064] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An automatic welding device for a longitudinal beam of a semitrailer, comprising two electric slide rails (1) and an adaptive flat welding structure (14) for welding a longitudinal beam body (6), characterized in that: The tops of the two electric slide rails (1) are slidably connected to a platform (2), the sides of the platform (2) are fixedly connected to a climbing scaffold (3), the inside of the platform (2) is fixedly connected to longitudinal slide rails (13) on both sides, the insides of the two longitudinal slide rails (13) are slidably connected to longitudinal electric sliders (15), and the adjacent sides of the two longitudinal electric sliders (15) are fixedly connected to connecting blocks (16); The adaptive flat welding structure (14) comprises two sliding frames (19), two sliding rods (17) are fixedly connected to the front of the two connecting blocks (16), two pairs of transverse electric sliders (18) are symmetrically slidably connected to the outer surfaces of the two sliding rods (17), the tops of the two sliding frames (19) are respectively fixedly connected to the bottoms of the two pairs of transverse electric sliders (18), the interiors of the two sliding frames (19) are provided with sliding grooves (24) running through the bottoms, the bottoms of the two sliding frames (19) and the rear parts of the sliding grooves (24) are fixedly connected to welding guns (20), the top of the stand (2) is fixedly connected to the fuel tank (4), the bottom of the fuel tank (4) is fixedly connected to the fuel tank (4), and the bottom of the fuel tank (4) is fixedly connected to the fuel tank (4). The top of the platform (2) passes through the top of the platform (2) and is fixedly connected to the two welding guns (20) with a fuel pipe (21); the inside of the slide groove (24) is symmetrically slidably connected to two sliding blocks (25); the inside of the slide groove (24) and passing through the two sliding blocks (25) are fixedly connected to two fixed rods (26); the sides of the two sliding blocks (25) that are away from each other and between the slide groove (24) and located on the outer surface of the fixed rod (26) are fixedly connected with a spring (27); the bottom of the two sliding blocks (25) passes through the bottom of the sliding frame (19) and is rotatably connected to a longitudinal rod (22); the bottom of the longitudinal rod (22) is fixedly connected to an extrusion wheel (23).

2. The automatic welding equipment for a semitrailer longitudinal beam according to claim 1, characterized in that: The two extrusion wheels (23) located at the bottom of the same sliding frame (19) are respectively extruded with the inner side and the outer side of the longitudinal beam body (6), and the output end of the welding gun (20) is aligned with the welding seam of the longitudinal beam body (6).

3. The automatic welding equipment for a semitrailer longitudinal beam according to claim 1, characterized in that: Two vertical frames (7) are arranged between the two electric slide rails (1) and inside the platform (2), and the longitudinal beam body (6) is located on the top of the two vertical frames (7).

4. The automatic welding equipment for a semitrailer longitudinal beam according to claim 1, characterized in that: A plurality of vertical blocks (8) are fixedly connected at equal intervals on the tops of the two vertical frames (7); a roller (9) is rotatably connected between the two vertical blocks (8) symmetrically on the left and right; a single-phase motor (10) is fixedly connected to the side of the vertical block (8) at the front of one side; an output shaft of the single-phase motor (10) passes through the vertical block (8) at the front of one side and is fixedly connected to the roller (9) at the front; a transmission gear (11) is rotatably connected to the side of all the vertical blocks (8) at the other side; a gear belt (12) is meshed between all the transmission gears (11); and the transmission gear (11) is fixedly connected to the roller (9).

5. The automatic welding equipment for a semitrailer longitudinal beam according to claim 3, characterized in that: A fixing block (28) is fixedly connected to the rear of the top of the two upright frames (7), a baffle (29) is rotatably connected between the two fixing blocks (28), and asynchronous motors (30) are fixedly connected to the sides of the two fixing blocks (28) that are away from each other, and the output shafts of the two asynchronous motors (30) respectively penetrate the two fixing blocks (28) and are fixedly connected to the two sides of the baffle (29).

6. The automatic welding equipment for a semitrailer longitudinal beam according to claim 4, characterized in that: A plurality of positioning clamping structures (5) are arranged at intervals between the tops of the two upright frames (7) and the rollers (9). The positioning clamping structures (5) include positioning frames (31). The positioning frames (31) are provided with placement grooves (32) inside. The placement grooves (32) are slidably connected with positioning sliders (33). The top of the positioning frames (31) is provided with through grooves (34) communicating with the placement grooves (32). The top of the positioning slider (33) is fixedly connected with a left positioning block (35) through the through groove (34). The top of the positioning slider (33) is fixedly connected with a right positioning block (37) on one side. The placement grooves (32) are fixedly connected with an electric push rod (36). The output end of the electric push rod (36) is fixedly connected with one side of the positioning slider (33).

7. The automatic welding equipment for a semitrailer longitudinal beam according to claim 6, characterized in that: The left positioning block (35) and the right positioning block (37) are respectively in contact with the two sides of the longitudinal beam body (6); a plurality of positioning frames (31) are located on the top of the two vertical frames (7); and a plurality of positioning frames (31) are respectively located between two adjacent rotating rollers (9).

8. The automatic welding equipment for a semitrailer longitudinal beam according to claim 6, characterized in that: The front and rear parts of each positioning frame (31) are symmetrically fixedly connected with two ear seats (38), the top of the ear seat (38) passes through the bottom and is provided with a sliding groove (39), the top of the sliding groove (39) passes through the bottom and is threadedly connected to the stand frame (7) with a bolt (40).

9. The automatic welding equipment for a semitrailer longitudinal beam according to claim 1, characterized in that: The bottom of the two sliding frames (19) and the front part of the sliding groove (24) are both rotatably connected to a rotating rod (41), the bottom of the rotating rod (41) is fixedly connected to a brush ball (43), and the outer surface of the longitudinal rod (22) and the outer surface of the rotating rod (41) are both fixedly connected to a connecting gear (42).

10. The automatic welding equipment for a semitrailer longitudinal beam according to claim 9, characterized in that: The two connecting gears (42) mesh with each other, and the brush ball (43) contacts the welding seam of the longitudinal beam body (6).

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