Trailer girder splicing device

Abstract

The trailer girder splicing device comprises a splicing table, a conveying platform, an automatic wing plate feeding mechanism, a front end positioning mechanism, an upper wing plate online profiling mechanism, a lower wing plate middle section online profiling mechanism and a lower wing plate front end online profiling mechanism. The automatic wing plate feeding mechanism is arranged above the splicing table and used for feeding an upper wing plate and a lower wing plate to the splicing table. The front end positioning mechanism is arranged on the front side of the assembling table and used for positioning the front ends of the upper wing plate, the lower wing plate and the web plate. The upper wing plate online profiling mechanism is mounted on the assembly table and used for profiling an upper wing plate; the lower wing plate middle section online profiling mechanism is arranged in the middle of one side of the splicing table and used for profiling the lower wing plate middle section; the lower wing plate front end online profiling mechanism is installed at the front end of the assembling table and used for conducting profiling on the front end of the lower wing plate. The functions of wing plate online profiling, wing plate automatic feeding and wing plate and web positioning are integrated, time and labor are saved, and the assembly efficiency and quality can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of trailer beam production, and in particular to a trailer beam assembling device. Background Art

[0002] The trailer beam is an important load-bearing component of the trailer frame. The trailer beam is welded together by the upper wing plate, the web plate and the lower wing plate.

[0003] At present, most of the trailer beam assembly methods are to press the upper wing plate and the lower wing plate on a press and then assemble them with the web plate. Among them, the upper wing plate and the lower wing plate need to be marked and then pressed on the press, which is a complicated process. In addition, when assembling, the upper wing plate and the lower wing plate are manually loaded, which is time-consuming and labor-intensive, affecting the assembly efficiency and quality.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and thereby provide a trailer beam assembly device. The present invention is used for assembling trailer beams and integrates the functions of online fender profiling, automatic fender loading, and fender and web positioning, which saves time and effort and can improve assembly efficiency and quality.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a trailer beam assembly device includes an assembly platform, with the length direction of the assembly platform as the front-to-back direction, and a plurality of welding fixtures for clamping the beam are arranged at intervals in the front and rear of the assembly platform, and also includes a transmission platform, a wing panel automatic feeding mechanism, a front end positioning mechanism, an upper wing panel online pressing mechanism, a lower wing panel middle section online pressing mechanism and a lower wing panel front end online pressing mechanism; The transfer platform is arranged on one side of the assembly table along the front-rear direction, and is used to transfer the web to the assembly table position; The wing plate automatic feeding mechanism is arranged above the assembly table, and is used to feed the upper wing plate and the lower wing plate to the assembly table; The front end positioning mechanism is arranged at the front side of the assembly table and is used to position the front ends of the upper wing plate, the lower wing plate and the web plate; The upper wing plate online pressing mechanism is installed on the assembly table and is used to press the upper wing plate; The online pressing mechanism for the middle section of the lower wing plate is arranged in the middle of one side of the assembly table, and is used for pressing the middle section of the lower wing plate; The online pressing mechanism for the front end of the lower wing plate is installed at the front end of the assembly table and is used for pressing the front end of the lower wing plate.

[0007] Based on the above, the automatic wing panel loading mechanism includes a magnetic hoist arranged above the assembly table and a wing panel storage rack arranged on one side of the assembly table. The magnetic hoist is used to lift the upper wing panel and the lower wing panel from the wing panel storage rack to the assembly table, and the wing panel storage rack is used to store the incoming wing panels.

[0008] Based on the above, the front end positioning mechanism includes a front and rear moving frame, an upper wing plate positioning block, a belly plate positioning block and a lower wing plate positioning block. The front and rear moving frame is arranged on the front side of the assembly table. The upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block are arranged at intervals on the left and right and are respectively installed on the front and rear moving frame through a group of front and rear adjustment components. The front and rear moving frame drives the upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block to move forward and backward synchronously, so that the upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block are close to or away from the assembly table.

[0009] Based on the above, the online profiling mechanism of the upper wing plate includes a contoured gooseneck mold, a rotating block, an upper wing plate profiling block and a first profiling cylinder. The contoured gooseneck mold is fixed on the assembly table, the rotating block is rotatably installed on the assembly table through a vertical axis and is located on the side of the gooseneck surface facing the contoured gooseneck mold, the upper wing plate profiling block is fixed on the rotating block, and the two ends of the first profiling cylinder are respectively hinged on the assembly table and the rotating block through pins. The first profiling cylinder drives the rotating block to rotate, so that the rotating block drives the upper wing plate profiling block to rotate toward the gooseneck surface of the contoured gooseneck mold to realize the upper wing plate profiling.

[0010] Based on the above, several online profiling mechanisms are arranged at intervals in front and behind the middle section of the lower wing plate; the online profiling mechanism of the middle section of the lower wing plate includes a fixed frame, a first movable frame, a longitudinal cylinder, a second profiling cylinder and a profiling wheel. The fixed frame is fixedly arranged at a central position on one side of the assembly table, and a first linear guide is arranged on the fixed frame along the front-to-back direction. The first movable frame is slidably installed on the first linear guide, and the longitudinal cylinder is fixed on the fixed frame along the front-to-back direction. The piston rod end of the longitudinal cylinder is connected to the first movable frame and drives the first movable frame to move forward and backward. The second profiling cylinder is fixed to the first movable frame along the left-right direction, and the piston rod of the second profiling cylinder extends toward the other side of the assembly table. The profiling wheel is installed on the piston rod end of the second profiling cylinder, and the center axis of the profiling wheel is vertically arranged.

[0011] Based on the above, the online profiling mechanism at the front end of the lower wing plate includes a movable profiling block, two sliders and two second linear guide rails. The movable profiling block is provided with two pin holes which are spaced front and back and pass through up and down. At least one pin hole is elliptical. A rotating shaft is passed through the two pin holes. The movable profiling block is hinged to the two sliders through the two rotating shafts respectively. The two second linear guide rails are spaced front and back and installed at the front end of the assembly table along the left and right directions. The two sliders are slidably installed on the two second linear guide rails respectively. A third profiling cylinder arranged along the left and right directions is hinged between the two sliders and the assembly table respectively. The two third profiling cylinders respectively drive the two sliders to move left and right.

[0012] Based on the above, the front-to-back movable frame includes a base frame, a second movable frame and a driving cylinder. A third linear guide is arranged on the base frame along the front-to-back direction. The second movable frame is slidably mounted on the third linear guide. The driving cylinder is fixed to the lower side of the base frame along the front-to-back direction. The piston rod end of the driving cylinder is connected to the movable frame and drives the movable frame to move forward and backward. Three front-to-back adjustment components are installed on the movable frame at intervals on the left and right sides. The front-to-back adjustment assembly includes a positioning sleeve and a telescopic rod. The positioning sleeve is fixed on the second movable frame and its center line is arranged along the front-to-back direction. The outer tube of the telescopic rod is coaxially penetrated and slidably installed in the positioning sleeve. A long positioning rack with a scale is axially arranged on the outer tube of the telescopic rod. A locking short rack meshing and locked with the long positioning rack is movably installed on the second movable frame through a screw. The piston rod of the telescopic rod extends out of the rear end of its outer tube. A locking positioning piece is arranged on the outer tube of the telescopic rod. The locking positioning piece is used to lock or loosen the piston rod sliding in the outer tube of the telescopic rod. The upper wing plate positioning block, the web plate positioning block and the lower wing plate positioning block are respectively and correspondingly fixed on the rear ends of the piston rods of the three telescopic rods.

[0013] The trailer beam assembly method uses the trailer beam assembly device as described above to assemble the trailer beam, and specifically includes the following steps: The upper wing plate is fed onto the assembly table through the automatic wing plate feeding mechanism, so that the upper wing plate is attached to the side block of each welding fixture, and then the front end positioning mechanism is started to position the front end of the upper wing plate, and then the upper wing plate online pressing mechanism is started to press the upper wing plate. After the upper wing plate is pressed in place, the web plate transmitted from the transmission platform is pulled onto the assembly table, the web plate is kept horizontal, and the front end of the web plate is positioned by the front end positioning mechanism so that one side of the web plate is fitted with the upper wing plate, and then the wing plate is pressed into place. The automatic loading mechanism loads the lower wing plate onto the assembly table so that the lower wing plate is parallel to the upper wing plate, and positions the front end of the lower wing plate through the front end positioning mechanism, and then presses the lower wing plate through the other side block of each welding fixture to make the lower wing plate fit with the other side of the web plate, then starts the online pressing mechanism for the middle section of the lower wing plate to press the middle section of the lower wing plate to make the middle section of the lower wing plate fit with the other side arc section of the web plate, finally, starts the online pressing mechanism for the front end of the lower wing plate to press the front end of the lower wing plate to complete the assembly of the trailer beam.

[0014] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the present invention arranges an automatic wing panel feeding mechanism above the assembly table, which can realize automatic feeding of the upper wing panel and the lower wing panel onto the assembly table, thereby reducing manual operation, saving time and effort, and the front end positioning mechanism can be used to position the front ends of the upper wing panel, the lower wing panel and the web, thereby ensuring accurate positioning and high assembly quality during assembly. The upper wing panel online pressing mechanism, the lower wing panel middle section online pressing mechanism and the lower wing panel front end online pressing mechanism can respectively and correspondingly perform pressing on the upper wing panel and the lower wing panel during the assembly process, thereby improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the trailer beam assembly device of the present invention, and from a top view, the wing plate automatic feeding mechanism is omitted.

[0016] Figure 2 It is a structural schematic diagram of the trailer beam assembly device of the present invention, and from a top view angle, the assembly table and the transmission platform are omitted.

[0017] Figure 3 It is a structural schematic diagram of the wing plate automatic feeding mechanism of the present invention.

[0018] Figure 4 yes Figure 2 A partial enlarged view of point A in the middle.

[0019] Figure 5 yes Figure 2 A partial enlarged view of point B in the middle.

[0020] Figure 6 yes Figure 2 A partial enlarged view of point C in the middle.

[0021] In the figure: 1. Assembly table; 2. Welding fixture; 3. Conveying platform; 4. Front end positioning mechanism; 5. Online profiling mechanism for upper wing plate; 6. Online profiling mechanism for the middle section of lower wing plate; 7. Online profiling mechanism for the front end of lower wing plate; 8. Wing plate storage rack; 9. Column; 10. Cantilever rack; 11. Lifting mechanism; 12. Hanger; 13. Electro-permanent magnet; 14. Upper wing plate positioning block; 15. Web plate positioning block; 16. Lower wing plate positioning block; 17. Profiling gooseneck mold; 18. Rotating block; 19. Upper wing plate profiling block; 20. A profiling cylinder; 21. a fixed frame; 22. a first movable frame; 23. a longitudinal cylinder; 24. a second profiling cylinder; 25. a profiling wheel; 26. a first linear guide rail; 27. a movable profiling block; 28. a slider; 29. ​​a lower wing plate; 30. a rotating shaft; 31. a third profiling cylinder; 32. a base frame; 33. a second movable frame; 34. a driving cylinder; 35. a third linear guide rail; 36. a positioning sleeve; 37. a telescopic rod; 38. a positioning long rack; 39. a locking short rack; 40. an upper wing plate; 41. a belly plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0023] like Figure 1-Figure 6 As shown, the trailer beam assembly device includes an assembly platform 1, with the length direction of the assembly platform 1 as the front-to-back direction, and a plurality of welding fixtures 2 for clamping the beam are arranged at intervals in the front and rear directions on the assembly platform 1, and also includes a transmission platform 3, a wing plate automatic feeding mechanism, a front end positioning mechanism 4, an upper wing plate online pressing mechanism 5, a lower wing plate middle section online pressing mechanism 6 and a lower wing plate front end online pressing mechanism 7; The transmission platform 3 is arranged on one side of the assembly platform 1 along the front-to-back direction, and is used to transmit the web 41 to the assembly platform 1 position; The wing plate automatic feeding mechanism is arranged above the assembly platform 1, and is used to feed the upper wing plate 40 and the lower wing plate 29 to the assembly platform 1; The front end positioning mechanism 4 is arranged at the front side of the assembly platform 1 and is used to position the front ends of the upper wing plate 40, the lower wing plate 29 and the web plate 41; The upper wing plate online pressing mechanism 5 is installed on the assembly table 1 and is used to press the upper wing plate 40; The lower wing plate middle section online pressing mechanism 6 is arranged in the middle of one side of the assembly platform 1, and is used to press the middle section of the lower wing plate 29; The online pressing mechanism 7 for the front end of the lower wing plate is installed at the front end of the assembly table 1 and is used for pressing the front end of the lower wing plate 29 .

[0024] The transmission platform 3 is a roller conveyor or a chain conveyor.

[0025] Specifically, the wing plate automatic feeding mechanism includes a magnetic hanger arranged above the assembly platform 1 and a wing plate storage rack 8 arranged on one side of the assembly platform 1. The magnetic hanger is used to lift the upper wing plate 40 and the lower wing plate 29 from the wing plate storage rack 8 to the assembly platform 1. The wing plate storage rack 8 is used to store the incoming wing plate. The magnetic hanger is mainly composed of a column 9, a cantilever frame 10, left and right linear drive mechanisms, a lifting mechanism 11, a hanger 12 and a plurality of electro-permanent magnets 13.

[0026] Specifically, the front end positioning mechanism 4 includes a front and rear moving frame, an upper wing plate positioning block 14, a web plate positioning block 15 and a lower wing plate positioning block 16. The front and rear moving frame is arranged at the front side of the assembly platform 1. The upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 are arranged at intervals on the left and right and are respectively installed on the front and rear moving frame through a group of front and rear adjustment components. The front and rear moving frame drives the upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 to move forward and backward synchronously, so that the upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 are close to or away from the assembly platform 1. The front and rear positions of the upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 can be adjusted respectively through the front and rear adjustment components to ensure that the upper wing plate 40, the lower wing plate 29 and the web plate 41 of different sizes are positioned in a limited space, and the upper wing plate 40, the lower wing plate 29 and the web plate 41 are accurately assembled, thereby improving the assembly quality.

[0027] Specifically, the upper wing plate online profiling mechanism 5 includes a gooseneck profiling mold 17, a rotating block 18, an upper wing plate profiling block 19 and a first profiling cylinder 20. The gooseneck profiling mold 17 is fixed on the assembly table 1, and the rotating block 18 is rotatably installed on the assembly table 1 through a vertical axis and is located on the gooseneck surface side facing the gooseneck profiling mold 17. The upper wing plate profiling block 19 is fixed on the rotating block 18. The two ends of the first profiling cylinder 20 are respectively hinged on the assembly table 1 and the rotating block 18 through pins. The first profiling cylinder 20 drives the rotating block 18 to rotate, so that the rotating block 18 drives the upper wing plate profiling block 19 to rotate toward the gooseneck surface of the gooseneck profiling mold 17 to realize the profiling of the upper wing plate 40. When the upper wing plate 40 is pressed, the rotating block 18 is driven to rotate by the first pressing cylinder 20, and the rotating block 18 drives the upper wing plate pressing block 19 to rotate to press the upper wing plate 40 against the gooseneck surface of the contoured gooseneck mold 17, so that the upper wing plate 40 fits the gooseneck surface of the contoured gooseneck mold 17 for pressing.

[0028] Specifically, two of the online profiling mechanisms 6 are arranged at intervals in the front and rear of the middle section of the lower wing plate; the online profiling mechanism 6 of the middle section of the lower wing plate includes a fixed frame 21, a first movable frame 22, a longitudinal cylinder 23, a second profiling cylinder 24 and a profiling wheel 25. The fixed frame 21 is fixedly arranged at a central position on one side of the assembly platform 1, and a first linear guide rail 26 is arranged on the fixed frame 21 along the front-to-back direction. The first movable frame 22 is slidably installed on the first linear guide rail 26. The longitudinal cylinder 23 is fixed on the fixed frame 21 along the front-to-back direction, and the piston rod end of the longitudinal cylinder 23 is connected to the first movable frame 22 and drives the first movable frame 22 to move forward and backward. The second profiling cylinder 24 is fixed on the first movable frame 22 along the left-right direction, and the piston rod of the second profiling cylinder 24 extends toward the other side of the assembly platform 1. The profiling wheel 25 is installed at the piston rod end of the second profiling cylinder 24, and the center axis of the profiling wheel 25 is vertically arranged. When in use, the longitudinal cylinder 23 drives the first movable frame 22 to move forward and backward, and the first movable frame 22 drives the second embossing cylinder 24 and the embossing wheel 25 to move together. At the same time, the embossing wheel 25 is pressed against the lower wing plate 29 through the extension and contraction of the second embossing cylinder 24, so that the lower wing plate 29 is embossed and fully fits with the web 41.

[0029] Specifically, the online profiling mechanism 7 at the front end of the lower wing plate includes a movable profiling block 27, two sliders 28 and two second linear guides. The movable profiling block 27 is provided with two pin holes spaced front and back and penetrating up and down. At least one pin hole is elliptical. A rotating shaft 30 is provided through the two pin holes. The movable profiling block 27 is respectively hinged with the two sliders 28 through the two rotating shafts 30. The two second linear guides are spaced front and back and installed in the front end of the assembly platform 1 along the left and right directions. The two sliders 28 are respectively slidably installed on the two second linear guides. A third profiling cylinder 31 arranged in the left and right directions is respectively hinged between the two sliders 28 and the assembly platform 1. The two third profiling cylinders 31 respectively drive the two sliders 28 to move left and right. When in use, the two third profiling cylinders 31 are controlled to act separately, so that the movable profiling block 27 can be tilted at a suitable angle to fit the front end of the lower wing plate 29 with the front end of the web 41, so as to realize the profiling of the front end of the lower wing plate 29.

[0030] Specifically, the front-to-back movable frame includes a base frame 32, a second movable frame 33 and a driving cylinder 34. A third linear guide rail 35 is provided on the base frame 32 along the front-to-back direction. The second movable frame 33 is slidably mounted on the third linear guide rail 35. The driving cylinder 34 is fixed to the lower side of the base frame 32 along the front-to-back direction. The piston rod end of the driving cylinder 34 is connected to the movable frame and drives the movable frame to move forward and backward. Three front-to-back adjustment components are installed on the movable frame at intervals on the left and right sides. The front-to-back adjustment assembly includes a positioning sleeve 36 and a telescopic rod 37. The positioning sleeve 36 is fixed on the second movable frame 33 and its center line is set along the front-to-back direction. The outer tube of the telescopic rod 37 is coaxially penetrated and slidably installed in the positioning sleeve 36. A long positioning rack 38 with a scale is axially arranged on the outer tube of the telescopic rod 37. A locking short rack 39 engaged and locked with the long positioning rack 38 is movably installed on the second movable frame 33 by screws. The piston rod of the telescopic rod 37 extends out of the rear end of its outer tube. A locking positioning piece is arranged on the outer tube of the telescopic rod 37. The locking positioning piece is used to lock or loosen the piston rod sliding in the outer tube of the telescopic rod 37; the locking positioning piece is a locking bolt arranged on the outer tube of the telescopic rod 37 or a pin arranged on the outer tube of the telescopic rod 37 and a plurality of positioning holes arranged on the piston rod of the telescopic rod 37.

[0031] The upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 are respectively fixed to the rear ends of the piston rods of the three telescopic rods 37. When in use, the positions of the three telescopic rods 37 relative to the positioning sleeves 36 and the lengths of the three telescopic rods 37 are respectively adjusted according to the sizes of the upper wing plate 40, the lower wing plate 29 and the web plate 41, and then the front and rear positions of the upper wing plate positioning block 14, the web plate positioning block 15 and the lower wing plate positioning block 16 are adjusted.

[0032] This embodiment also provides a method for assembling a trailer beam, which uses the trailer beam assembling device as described above to assemble a trailer beam, and specifically includes the following steps: The upper wing plate 40 is loaded onto the assembly table 1 through the wing plate automatic feeding mechanism, so that the upper wing plate 40 is attached to the side block of each welding fixture 2, and then the front end positioning mechanism 4 is started to position the front end of the upper wing plate 40, and then the upper wing plate online pressing mechanism 5 is started to press the upper wing plate 40. After the upper wing plate 40 is pressed into place, the web plate 41 transmitted from the transmission platform 3 is pulled onto the assembly table 1, and the web plate 41 is kept horizontal. The front end of the web plate 41 is positioned by the front end positioning mechanism 4 so that one side of the web plate 41 is in contact with the upper wing plate 40, and then the wing plate 40 is pressed into place by the wing plate automatic feeding mechanism. The automatic loading mechanism loads the lower wing panel 29 onto the assembly table 1 so that the lower wing panel 29 is parallel to the upper wing panel 40, and positions the front end of the lower wing panel 29 through the front end positioning mechanism 4, and then presses the lower wing panel 29 through the other side block of each welding fixture 2 so that the lower wing panel 29 fits with the other side of the web 41, and then starts the online pressing mechanism 6 for the middle section of the lower wing panel to press the middle section of the lower wing panel 29 so that the middle section of the lower wing panel 29 fits with the other side arc section of the web 41, and finally, starts the online pressing mechanism 7 for the front end of the lower wing panel to press the front end of the lower wing panel 29 to complete the assembly of the trailer beam.

[0033] The present invention arranges an automatic wing plate feeding mechanism above the assembly table 1, which can realize automatic feeding of the upper wing plate 40 and the lower wing plate 29 onto the assembly table 1, reducing manual operation, saving time and labor, and the front end positioning mechanism 4 can position the front ends of the upper wing plate 40, the lower wing plate 29 and the web 41, ensuring accurate positioning and high assembly quality during assembly, and the upper wing plate online pressing mechanism 5, the lower wing plate middle section online pressing mechanism 6 and the lower wing plate front end online pressing mechanism 7 can respectively and correspondingly press the upper wing plate 40 and the lower wing plate 29 during the assembly process, thereby improving the assembly efficiency.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A trailer beam assembly device, comprising an assembly platform, with the longitudinal direction of the assembly platform as the front-to-back direction, and a plurality of welding fixtures for clamping the beam are arranged at intervals in the front and rear directions on the assembly platform, characterized in that: It also includes a transmission platform, an automatic wing plate feeding mechanism, a front end positioning mechanism, an upper wing plate online pressing mechanism, a lower wing plate middle section online pressing mechanism and a lower wing plate front end online pressing mechanism; The transfer platform is arranged on one side of the assembly table along the front-rear direction, and is used to transfer the web to the assembly table position; The wing plate automatic feeding mechanism is arranged above the assembly table, and is used to feed the upper wing plate and the lower wing plate to the assembly table; The front end positioning mechanism is arranged at the front side of the assembly table and is used to position the front ends of the upper wing plate, the lower wing plate and the web plate; The upper wing plate online pressing mechanism is installed on the assembly table and is used to press the upper wing plate; The online pressing mechanism for the middle section of the lower wing plate is arranged in the middle of one side of the assembly table, and is used for pressing the middle section of the lower wing plate; The online pressing mechanism for the front end of the lower wing plate is installed at the front end of the assembly table and is used for pressing the front end of the lower wing plate.

2. The trailer beam assembly device according to claim 1, characterized in that: The automatic wing panel feeding mechanism includes a magnetic hoist arranged above the assembly table and a wing panel storage rack arranged on one side of the assembly table. The magnetic hoist is used to lift the upper wing panel and the lower wing panel from the wing panel storage rack to the assembly table, and the wing panel storage rack is used to store the incoming wing panels.

3. The trailer beam assembly device according to claim 1, characterized in that: The front end positioning mechanism includes a front and rear moving frame, an upper wing plate positioning block, a belly plate positioning block and a lower wing plate positioning block. The front and rear moving frame is arranged on the front side of the assembly table. The upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block are arranged at intervals on the left and right and are respectively installed on the front and rear moving frame through a group of front and rear adjustment components. The front and rear moving frame drives the upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block to move forward and backward synchronously, so that the upper wing plate positioning block, the belly plate positioning block and the lower wing plate positioning block are close to or away from the assembly table.

4. The trailer beam assembly device according to claim 1, characterized in that: The online profiling mechanism of the upper wing plate includes a contoured gooseneck mold, a rotating block, an upper wing plate profiling block and a first profiling cylinder. The contoured gooseneck mold is fixed on the assembly table, the rotating block is rotatably installed on the assembly table through a vertical axis and is located on the side of the gooseneck surface facing the contoured gooseneck mold, the upper wing plate profiling block is fixed on the rotating block, and the two ends of the first profiling cylinder are respectively hinged on the assembly table and the rotating block through pins. The first profiling cylinder drives the rotating block to rotate, so that the rotating block drives the upper wing plate profiling block to rotate toward the gooseneck surface of the contoured gooseneck mold to realize the upper wing plate profiling.

5. The trailer beam assembly device according to claim 1, characterized in that: There are several online profiling mechanisms arranged at intervals in front and behind the middle section of the lower wing plate; the online profiling mechanism of the middle section of the lower wing plate includes a fixed frame, a first movable frame, a longitudinal oil cylinder, a second profiling oil cylinder and a profiling wheel. The fixed frame is fixedly arranged at a central position on one side of the assembly table, a first linear guide is arranged on the fixed frame along the front-to-back direction, the first movable frame is slidably installed on the first linear guide, the longitudinal oil cylinder is fixed on the fixed frame along the front-to-back direction, the piston rod end of the longitudinal oil cylinder is connected to the first movable frame and drives the first movable frame to move forward and backward, the second profiling oil cylinder is fixed to the first movable frame along the left-right direction, the piston rod of the second profiling oil cylinder extends toward the other side of the assembly table, the profiling wheel is installed on the piston rod end of the second profiling oil cylinder, and the center axis of the profiling wheel is vertically arranged.

6. The trailer beam assembly device according to claim 1, characterized in that: The online profiling mechanism at the front end of the lower wing plate includes a movable profiling block, two sliders and two second linear guides. The movable profiling block is provided with two pin holes which are spaced front to back and pass through up and down. At least one pin hole is elliptical. A rotating shaft is passed through the two pin holes. The movable profiling block is hinged to the two sliders respectively through the two rotating shafts. The two second linear guides are spaced front to back and installed at the front end of the assembly table along the left and right directions. The two sliders are slidably installed on the two second linear guides respectively. A third profiling cylinder arranged along the left and right directions is hinged between the two sliders and the assembly table respectively. The two third profiling cylinders drive the two sliders to move left and right respectively.

7. The trailer beam assembly device according to claim 3, characterized in that: The front-to-back movable frame includes a base frame, a second movable frame and a driving cylinder. A third linear guide is arranged on the base frame along the front-to-back direction. The second movable frame is slidably mounted on the third linear guide. The driving cylinder is fixed to the lower side of the base frame along the front-to-back direction. The piston rod end of the driving cylinder is connected to the movable frame and drives the movable frame to move forward and backward. Three front-to-back adjustment components are installed on the movable frame at intervals on the left and right sides. The front-to-back adjustment assembly includes a positioning sleeve and a telescopic rod. The positioning sleeve is fixed on the second movable frame and its center line is arranged along the front-to-back direction. The outer tube of the telescopic rod is coaxially penetrated and slidably installed in the positioning sleeve. A long positioning rack with a scale is axially arranged on the outer tube of the telescopic rod. A locking short rack meshing and locked with the long positioning rack is movably installed on the second movable frame through a screw. The piston rod of the telescopic rod extends out of the rear end of its outer tube. A locking positioning piece is arranged on the outer tube of the telescopic rod. The locking positioning piece is used to lock or loosen the piston rod sliding in the outer tube of the telescopic rod. The upper wing plate positioning block, the web plate positioning block and the lower wing plate positioning block are respectively and correspondingly fixed on the rear ends of the piston rods of the three telescopic rods.

8. A method for assembling a trailer beam, characterized in that: The trailer beam assembly device according to any one of claims 1 to 7 is used to assemble the trailer beam, which specifically includes the following steps: The upper wing plate is fed onto the assembly table through the automatic wing plate feeding mechanism, so that the upper wing plate is attached to the side block of each welding fixture, and then the front end positioning mechanism is started to position the front end of the upper wing plate, and then the upper wing plate online pressing mechanism is started to press the upper wing plate. After the upper wing plate is pressed in place, the web plate transmitted from the transmission platform is pulled onto the assembly table, the web plate is kept horizontal, and the front end of the web plate is positioned by the front end positioning mechanism so that one side of the web plate is fitted with the upper wing plate, and then the wing plate is pressed into place. The automatic loading mechanism loads the lower wing plate onto the assembly table so that the lower wing plate is parallel to the upper wing plate, and positions the front end of the lower wing plate through the front end positioning mechanism, and then presses the lower wing plate through the other side block of each welding fixture to make the lower wing plate fit with the other side of the web plate, then starts the online pressing mechanism for the middle section of the lower wing plate to press the middle section of the lower wing plate to make the middle section of the lower wing plate fit with the other side arc section of the web plate, finally, starts the online pressing mechanism for the front end of the lower wing plate to press the front end of the lower wing plate to complete the assembly of the trailer beam.

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