Automatic assembling mechanism for I-shaped steel

Abstract

The invention discloses an automatic assembling mechanism for I-shaped steel, which comprises plate supply mechanisms, swing lapping mechanisms, plate conveying mechanisms, an assembling mechanism and a spot welding mechanism, the plate supply mechanisms are arranged at the two ends of the plate conveying mechanisms, the swing lapping mechanisms are arranged on the plate conveying mechanisms, and the plate conveying mechanisms are divided into an upper group and a lower group; a rotating assembly is installed between the plate conveying mechanism and the ground, rotation of the plate conveying mechanism is achieved through the rotating assembly, the plate conveying mechanism is disconnected into two sections, an assembling mechanism is arranged between the two sections of the plate conveying mechanism, and a spot welding mechanism is installed on the assembling mechanism. Automatic placing and lapping before H steel welding are conveniently achieved, and spot welding between plates is conducted in an automatic welding mode.

Description

Technical Field

[0001] The invention relates to the field of steel structure workshop processing equipment, and in particular to an automatic assembling mechanism for I-beams. Background Art

[0002] H-steel is the main supporting column and beam of the steel structure factory building. The number of H-steel required to build a steel structure factory building is relatively large. At the same time, H-steel is the main load-bearing component, and the structural stability of the H-steel needs to be guaranteed. In the current H-steel processing, the middle plate and the bottom plate are clamped on the assembly machine, and the assembly machine drives the bottom plate and the middle plate to move. The connection between the middle plate and the bottom plate is manually spot-welded on both sides, thus forming a T-steel. The bottom plate is placed on the conveying mechanism, and the T-plate is flipped 180 degrees and placed on the second bottom plate. The T-plate and the bottom plate are assembled and conveyed by the assembly machine, and then manually spot-welded. This completes the initial assembly of the H-steel, and full welding is required later to ensure the welding strength of the H-steel. The assembled bottom plate and T-plate need to be transported by a gantry truck multiple times, which is labor-intensive for the workers. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention proposes an automatic assembly mechanism for I-beams, which facilitates automatic assembling of H-steels before welding and performs spot welding between plates by automatic welding.

[0004] To achieve the above-mentioned purpose, the present invention provides a solution: an automatic assembly mechanism for I-beams, comprising a plate supply mechanism, a swing mechanism, a plate conveying mechanism, an assembly mechanism and a spot welding mechanism, wherein the plate supply mechanism is provided at both ends of the plate conveying mechanism, and the swing mechanism is provided on the plate conveying mechanism, wherein the plate conveying mechanism is divided into two groups, an upper and a lower groups, a rotating assembly is installed between the plate conveying mechanism and the ground, and the plate conveying mechanism is rotated by the rotating assembly, the plate conveying mechanism is disconnected to form two sections, an assembly mechanism is provided between the two sections of the plate conveying mechanism, and a spot welding mechanism is installed on the assembly mechanism; The plate conveying mechanism consists of an upper conveying assembly, a lower conveying assembly and a pressing assembly. The upper conveying assembly and the lower conveying assembly are arranged opposite to each other in an upper and lower direction. The upper conveying assembly and the lower conveying assembly are fixed. An adjustable pressing assembly is provided between the upper conveying assembly and the lower conveying assembly. The pressing assembly presses the plate onto the upper conveying assembly and the lower conveying assembly for conveyance. A swing mechanism is provided between the upper conveying assembly and the lower conveying assembly. The swing mechanism limits the position of the middle plate. The assembly mechanism includes a frame, a bottom roller, a pressure roller and a clamping wheel. The multiple bottom rollers are arranged side by side and the two ends of the bottom rollers are installed on the frame. The tops of the multiple bottom rollers are flush with the plate conveying mechanism. The multiple bottom rollers are driven by a motor. A pressure roller that can be raised and lowered is provided on the frame above the bottom roller. The clamping wheel is located between the bottom roller and the pressure roller. The clamping wheels are divided into two groups and the two groups of clamping wheels clamp the bottom plate and the middle plate on both sides. Each group of clamping wheels is installed on the clamping seat. A clamping module is installed on the clamping seat. The clamping wheel clamps the middle plate through the clamping module, and the middle plate is pressed down to fit the bottom plate through the pressure roller. Limiting wheels are installed on the inner walls on both sides of the frame fastened by bolts, and the two sides of the bottom plate are limited by the limiting wheels to ensure the relative position of the middle plate and the bottom plate. Two groups of spot welding mechanisms are arranged at the assembly mechanism, and the spot welding mechanisms spot weld the connection between the middle plate and the bottom plate.

[0005] The top of the transmission gear and the bottom of the transmission gear are pivotally connected to each other with a bolt, and the bolt has a round shank to contact with the bottom of the transmission gear, and the bolt has a round shank to contact with the bottom of the transmission gear.

[0006] Preferably, the swinging mechanism is installed on the connecting frames on both sides, and the middle plate is clamped by the swinging mechanism. The swinging mechanism includes a clamping rod and a clamping wheel, wherein a rotating rod is installed on the frame of the upper conveying assembly and the lower conveying assembly, and both ends of the rotating rod are rotatably connected to the frame, a clamping rod is installed on the rotating rod, and a clamping wheel is installed on the other end of the clamping rod. A second hydraulic cylinder is installed on the frame, and a sliding sleeve that slides with the frame is provided on one side of the clamping rod, and a pull rod is provided between the sliding sleeve and the clamping rod. A second hydraulic cylinder is installed on the mounting plate of the frame, and a pushing frame is installed on the piston rod of the second hydraulic cylinder. The two ends of the pushing frame are fixed to the sliding sleeve, and the movement of the two sliding sleeves is realized by the second hydraulic cylinder.

[0007] Preferably, the plate supply mechanism includes a lifting frame, conveyor rollers and a plate storage assembly, wherein plate storage assemblies are arranged on both sides of the lifting frame, and two groups of plate storage assemblies are respectively placed on the middle plate and the bottom plate, and the plate storage assembly includes a placing plate and a baffle, wherein a placing plate is arranged on the ground, and vertically arranged baffles are arranged on the ground on both sides of the placing plate, and multiple groups of third hydraulic cylinders are arranged between the placing plate and the ground, wherein the baffle located on the outside of the placing plate is higher than the baffle located on the inside, and a pushing hydraulic cylinder is installed on the outer baffle, and the plate is pushed onto the lifting frame by the pushing hydraulic cylinder, and the top of the lifting frame is a plurality of conveyor rollers arranged side by side, and the plurality of conveyor rollers are driven by a motor, and a jacking assembly is arranged at the bottom of the lifting frame, and the lifting of the lifting frame is realized by the jacking assembly, and the conveyor rollers are driven to rotate by the motor.

[0008] Preferably, the spot welding mechanism is divided into two groups and the two groups of spot welding mechanisms are located on both sides of the middle plate. Each group of spot welding mechanisms is composed of two welding assemblies arranged side by side. Each welding assembly includes a friction wheel and a retractable welding gun. A friction wheel that moves with the clamping wheel is installed on the clamping seat. The friction wheels are located on both sides of the clamping wheel. When the clamping wheel is against the middle plate, the friction wheels contact the middle plate. A downwardly extending vertical shaft is installed on the clamping seat through a bearing. The friction wheel is installed on the vertical shaft for rotation. A one-way bearing is provided between the friction wheel and the vertical shaft. A welding seat is provided below the clamping seat. The welding gun is installed on the welding seat. The welding gun and the welding seat are slidably matched. The bottom of the vertical shaft is installed on the clamping seat through a bearing. On the welding seat, a cam is installed at the bottom of the vertical shaft through a bearing, a circular groove coaxial with the vertical shaft is opened on the cam, a second gear ring is fixed on the inner wall of the circular groove, a driving gear is installed on the vertical shaft, a planetary gear meshing with the driving gear and the second gear ring is provided between the driving gear and the second gear ring, multiple planetary gears are installed on the welding seat through bearings, an inclined groove is provided on the welding seat, a welding pen is inserted in the inclined groove, a waist-shaped groove connected to the inclined groove is opened on the top of the welding seat, a vertical rod is fixed on the top of the welding pen, the vertical rod slides in the waist-shaped hole, the vertical rod fits against the outer wall of the cam, a compression spring is embedded in the waist-shaped hole, and the vertical rod is pressed against the outer wall of the cam by the compression spring.

[0009] Compared with the prior art, the present invention has the advantages of facilitating automatic assembling before H-steel welding and performing spot welding between plates by automatic welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional view of the present invention.

[0011] Figure 2 It is a top view of the present invention.

[0012] Figure 3 This is a three-dimensional view of a single-group plate conveying mechanism of the present invention.

[0013] Figure 4It is a left view of the present invention.

[0014] Figure 5 It is a three-dimensional view of the plate conveying mechanism of the present invention.

[0015] Figure 6 It is a top view of the plate conveying mechanism of the present invention.

[0016] Figure 7 Schematic diagram of the rotating assembly of the present invention.

[0017] Figure 8 It is a schematic diagram of the swinging mechanism of the present invention.

[0018] Figure 9 It is a top view of the swing mechanism of the present invention.

[0019] Figure 10 Schematic diagram of the compression assembly of the present invention.

[0020] Figure 11 It is a top view of the clamping assembly of the present invention.

[0021] Figure 12 It is a schematic diagram of the assembly mechanism of the present invention.

[0022] Figure 13 Schematic diagram of the clamping wheel and welding mechanism of the present invention.

[0023] Figure 14 Schematic diagram of the welding pen and the clamping base of the present invention.

[0024] Among them, 1. Plate supply mechanism, 2. Lifting frame, 3. Conveyor roller, 4. Lifting assembly, 5. Plate storage assembly, 6. Placement plate, 7. Baffle, 8. Third hydraulic cylinder, 9. Pushing hydraulic cylinder, 10. Swinging mechanism, 11. Clamping rod, 12. Clamping wheel, 13. Rotating rod, 14. Second hydraulic cylinder, 15. Sliding sleeve, 16. Pull rod, 17. Pushing frame, 18. Plate conveying mechanism, 19. Upper conveying assembly, 20. Lower conveying assembly, 21. Conveying roller, 22. Frame, 23. Mounting plate, 24. Pressing assembly, 25. Swing arm, 26. Pressing wheel, 27. Connecting frame , 29. The first hydraulic cylinder, 30. The connecting plate, 31. The assembly mechanism, 32. The frame, 33. The bottom roller, 34. The pressure roller, 35. The clamping wheel, 36. The clamping seat, 37. The clamping module, 38. The rotating assembly, 39. The circular slide rail, 40. The first gear ring, 41. The driving gear, 42. The spot welding mechanism, 43. The welding assembly, 44. The friction wheel, 45. The vertical shaft, 46. The welding seat, 47. The cam, 48. The second gear ring, 49. The driving gear, 50. The planetary gear, 51. The inclined slide groove, 52. The waist-shaped groove, 53. The welding gun, 54. The vertical rod, 55. The compression spring, 56. The sliding seat. DETAILED DESCRIPTION

[0025] The present invention is now further described with reference to the accompanying drawings.

[0026] like Figure 1-14 As shown, an automatic assembly mechanism 31 for I-beams includes a plate supply mechanism 1, a swing mechanism 10, a plate conveying mechanism 18, an assembly mechanism 31 and a spot welding mechanism 42. The plate supply mechanism 1 is set on the ground at the left and right ends of the plate conveying mechanism 18, and the plate supply mechanism 1 is used to supply plate materials to the plate conveying mechanism 18. The swing mechanism 10 is set on the plate conveying mechanism 18, wherein the plate conveying mechanism 18 is divided into two groups, the upper and lower groups are arranged oppositely, and a rotating component 38 is installed between the plate conveying mechanism 18 and the ground. The plate conveying mechanism 18 is rotated by the component 38, and the upper and lower plate conveying mechanisms 18 are switched by the rotating component 38. The plate conveying mechanism 18 is rotated 90 degrees by the rotating component 38, which facilitates the loading of the middle plate. The plate conveying mechanism 18 is broken into two sections, and an assembly mechanism 31 is provided between the two sections of the plate conveying mechanism 18. A spot welding mechanism 42 is installed on the assembly mechanism 31. When working, the plate conveying mechanism 18 on the left and right sides of the assembly mechanism 31 is loaded at the lower layer, and the plate conveying mechanism 18 is used to load the plate. The plate conveying mechanism 18 on the right rotates 180 degrees, and the plate conveying mechanism 18 on the left rotates 90 degrees to convey the middle plate to the plate conveying mechanism 18 on the left. The plate conveying mechanism 18 clamps the middle plate (making the middle plate perpendicular to the bottom plate), so that the middle plate and the bottom plate form an inverted T shape. The middle plate and the bottom plate on the left are conveyed to the right by the plate conveying mechanism 18 and pass through the assembly mechanism 31. The T-shaped plate is completed by the assembly mechanism 31. The T-shaped plate is assembled and welded, and the T-shaped plate is transported to the right plate conveying mechanism 18. The plate on the right plate conveying mechanism 18 is located above the T-shaped plate. The plate conveying mechanism 18 on the right rotates 180° counterclockwise so that the T-shaped plate is located above the bottom plate. The bottom plate and the T-shaped plate are transported to the left. The bottom plate and the T-shaped plate pass through the assembly mechanism 31. The assembly of the bottom plate and the middle plate is completed by the assembly mechanism 31. In this way, the automatic assembly of the I-beam is completed. The I-beam processed on the left continues to be conveyed to the left with the plate supply mechanism 1 and can be lifted away by the gantry car. The plate conveying mechanism 18 is composed of an upper conveying assembly 19, a lower conveying assembly 20 and a pressing assembly 24. The upper conveying assembly 19 and the lower conveying assembly 20 are arranged relative to each other up and down. Both the upper conveying assembly 19 and the lower conveying assembly 20 can convey the bottom plate. The upper conveying assembly 19 and the lower conveying assembly 20 are fixed, that is, the upper conveying assembly 19 and the lower conveying assembly 20 rotate synchronously. An adjustable pressing assembly 24 is provided between the upper conveying assembly 19 and the lower conveying assembly 20. The pressing assembly 24 presses the plate onto the upper conveying assembly 19 and the lower conveying assembly 20 for conveying. When the pressing assembly 24 is being loaded, it is away from the conveying assembly, The lower conveying assembly 20 is closed toward the middle, and the plate supply mechanism 1 is placed on the lower conveying assembly 20. After the plate is loaded, the pressing assembly 24 moves closer to the upper conveying assembly 19 and the lower conveying assembly 20, so that the plate is pressed on the upper conveying assembly 19 or the lower conveying assembly 20; a swing mechanism 10 is provided between the upper conveying assembly 19 and the lower conveying assembly 20, and the middle plate is limited by the swing mechanism, and the middle plate is clamped by the swing mechanism 10, so that the middle plate is perpendicular to the bottom plate when being conveyed; when working, the bottom plate is placed on the lower conveying assembly 20 on the left, and then rotated clockwise. 90 °, put the middle plate between the upper conveying assembly 19 and the lower conveying assembly 20, and then rotate it 90 ° counterclockwise so that the middle plate is perpendicular to the bottom plate, and then convey the middle plate and the bottom plate to the right to the assembly mechanism 31 for assembly. When the lower conveying assembly 20 on the left is loading the plate, the lower conveying assembly 20 on the right is also loading the plate. When the lower conveying assembly 20 on the left is loading the middle plate, the lower conveying assembly 20 on the right is rotated 180 °. When the bottom plate on the left is transported to the right, the lower conveying assembly 20 on the right is loading the plate at the same time. When the bottom and the middle plate are assembled and welded, the lower conveying assembly 20 on the left is After the upper plate is put on, the lower conveying assemblies 20 on the left and right rotate 180 degrees at the same time. Since the interval between the upper conveying assembly 19 and the lower conveying assembly 20 is greater than the distance between the two bottom plates of the I-beam, when the lower conveying assembly 20 on the right rotates 180 degrees, the clamping assembly 24 on the right moves in the middle and loses the clamping of the bottom plate, the T-shaped plate descends, the bottom of the T-shaped plate contacts the bottom plate and is conveyed to the right, and the lower conveying assembly 20 on the right puts on the plate. In this way, the assembly mechanism 31 welds the T-shaped plate to the bottom plate, so that the I-beam and the bottom plate for the next assembly are left above the I-beam, thus realizing automatic swing assembly. The assembly mechanism 31 includes a frame 32, a bottom roller 33, a pressure roller 34 and a clamping wheel 35. A gantry is installed on the ground between the left and right sets of plate conveying mechanisms 18. The frame 32 is mounted on the gantry by bolts. Multiple bottom rollers 33 are arranged side by side and both ends of the bottom rollers 33 are mounted on the frame 32 through bearings. A motor is mounted on the outer wall of the gantry by bolts. The output shaft of the motor is connected to the bottom roller 33 through a spline and transmits the power. The tops of the multiple bottom rollers 33 are flush with the plate conveying mechanism 18. Multiple bottom rollers 33 are driven by a motor. A pressure roller 34 that can be raised and lowered is provided on the frame 32 above the bottom roller 33. A hydraulic cylinder is installed on the top of the gantry by bolt fastening. The piston rod of the hydraulic cylinder is mounted on the pressure roller 34 through a bearing and a bearing seat. The top is pressed by the pressure roller 34, so that the middle plate and the bottom plate are in close contact. The clamping wheels 35 are located between the bottom roller 33 and the pressure roller 34, and the clamping wheels 35 are located on both sides of the middle plate. The clamping wheels 35 are divided into two groups and the two groups of clamping wheels 35 clamp the bottom plate and the middle plate on both sides. Each group of clamping wheels 35 is mounted on the clamping seat 36 through a bearing, and a clamping module 37 is mounted on the clamping seat 36. By moving the clamping seat 36, the clamping seat 36 clamps the middle plate, and the clamping wheel 35 clamps the middle plate through the clamping module 37. The middle plate is pressed down and fits the bottom plate through the pressure roller 34. Limiting wheels are installed on the inner walls of both sides of the frame 32 fastened by bolts, and the two sides of the bottom plate are limited by the limiting wheels to ensure the relative position of the middle plate and the bottom plate. Two sets of spot welding mechanisms 42 are provided at the assembly mechanism 31 , and the spot welding mechanisms 42 spot weld the connection between the middle plate and the bottom plate. When the middle plate and the bottom plate are assembled, the bottom plate and the middle plate are spot welded, thus completing the assembly.

[0027] The upper conveying assembly 19 and the lower conveying assembly 20 are both formed by a plurality of conveying rollers 21 arranged side by side, the upper conveying assembly 19 and the lower conveying assembly 20 are both installed on the frame 22 through bearings on both sides of the plurality of conveying rollers 21, that is, the frame 22 is divided into two groups of rectangular frames 32, the upper conveying assembly 19 and the lower conveying assembly 20 are installed through bolt fastening on the connecting frame 27 between the two groups of rectangular frames 32, the upper conveying assembly 19 and the lower conveying assembly 20 are fixed through the connecting frame 27, a plurality of groups of semicircular sliding seats 56 are installed on the ground through bolt fastening, the circular slide rails 39 are installed on the outer wall of the frame 22 through welding, the circular slide rails 39 are clamped in the sliding seats 56 to rotate, the sliding seats 56 are clamped on the circular slide rails 39 to slide, so that the rotation of the frame 22 is realized, and the position switching of the upper conveying assembly 19 and the lower conveying assembly 20 is realized, the gear rings coaxial with the circular slide rails 39 are installed on the outer wall of the circular slide rails 39 through welding, the grooves for the gear rings to pass through are opened on the sliding seats 56, the mounting plates 23 are fixed on the bottom of the two frames 22 of the lower conveying assembly 20 through bolt fastening, the stepping motors are fixed on the mounting plates 23 through bolt fastening, the drive gears 41 engaged with the first gear rings 40 are installed on the output shafts of the stepping motors through welding, and the rotation of the frame 22 is driven by the stepping motors; the pressing assembly 24 includes the swing arms 25 and the pressing wheels 26, one group of swing arms 25 is installed on each of the connecting frames 27 on both sides of the frame 22, each group of swing arms 25 is divided into two swing arms 25, one pair of swing arms 25 is installed on each connecting frame 27 through bearings in an up-down arrangement, the swing arms 25 can rotate relative to the connecting frame 27, the pressing wheels 26 are installed on the other sections of each swing arm 25 through bearings, the pressing wheels 26 can rotate, the cylinder bodies of the first hydraulic cylinders 29 are installed on the connecting frames 27 through bolt fastening, the connecting plates 30 are hinged between the piston rods of the first hydraulic cylinders 29 and each swing arm 25, the first hydraulic cylinders 29 are connected with the servo valves through conduits, the servo valves are communicated with the hydraulic system, the first hydraulic cylinders 29 are retracted and extended through the servo valves, the first hydraulic cylinders 29 are supplied with oil and power through the hydraulic system, when the bottom plate needs to be pressed, the first hydraulic cylinders 29 are lifted, so that the swing arms swing to close the upper conveying assembly 19 and the lower conveying assembly 20, and the bottom plate is pressed on the upper conveying assembly 19 and the lower conveying assembly 20, when the pressing is not needed, the first hydraulic cylinders 29 are retracted, and the two swing arms 25 are closed, so that the pressing effect is lost.

[0028] The swinging mechanism 10 is installed on the connecting frame 27 on both sides of the frame 22. The middle plate is clamped by the swinging mechanism 10. The swinging mechanism 10 includes a clamping rod 11 and a clamping wheel 12, wherein a rotating rod 13 is installed on the frame 22 of the upper conveying assembly 19 and the lower conveying assembly 20 through a bearing, and a clamping rod 11 is installed on the rotating rod 13 by welding. When the rotating rod 13 rotates, the clamping rod 11 also swings and clamps the middle plate. A clamping wheel 12 is installed on the other end of the clamping rod 11 through a bearing. The clamping wheel 12 is pressed on the middle plate, so that when pressing, it will not affect the transportation of the middle plate. A sliding sleeve 15 that slides with the frame 22 is provided on one side of the clamping rod 11. The sliding sleeve 15 is sleeved on the frame 22 to move left and right. A pull rod 16 is installed between the sliding sleeve 15 and the clamping rod 11 in a hinged manner. When the sliding sleeve 15 moves, the clamping rod 11 is driven to swing. When the movable sleeve is away from the rotating rod 13, the clamping rod 11 swings inward and clamps the middle plate. When the movable sleeve is close to the rotating rod 13, the clamping rod 11 swings outward, and the middle plate loses the clamping state. The cylinder body of the second hydraulic cylinder 14 is installed on the mounting plate 23 of the frame 22 by bolt fastening, and a pushing frame 17 is installed on the piston rod of the second hydraulic cylinder 14. The two ends of the pushing frame 17 are fixed to the sliding sleeve 15 by bolt fastening, and the movement of the two sliding sleeves 15 is realized by the second hydraulic cylinder 14. The second hydraulic cylinder 14 is also connected to the servo valve and the hydraulic system.

[0029] The plate supply mechanism 1 includes a lifting frame 2, a conveying roller 3 and a plate storage assembly 5, wherein the plate storage assembly 5 is arranged on the ground on both sides of the lifting frame 2, and two groups of plate storage assemblies 5 are respectively placed on the middle plate and the bottom plate. The plate storage assembly 5 includes a placement plate 6 and a baffle 7. Vertically arranged baffles 7 are installed on the ground on both sides of the placement plate 6 by bolt fastening. A trough for placing the middle plate and the bottom plate is formed by the placement plate 6 and the baffle 7. A jacking assembly 4 is installed between the placement plate 6 and the ground by bolt fastening. The jacking assembly 4 is a plurality of groups of third hydraulic cylinders 8. The jacking of the placement plate 6 is achieved by the third hydraulic cylinder 8. The channel pipeline of the third hydraulic cylinder 8 is connected to the servo valve and the hydraulic system. At the same time, the servo valve makes the third hydraulic cylinder 8 The three hydraulic cylinders 8 lift to the same height each time, and the height of each lifting is the thickness of the bottom plate or the middle plate, wherein the baffle 7 located on the outside of the placement plate 6 is higher than the baffle 7 located on the inside. When the bottom plate and the middle plate are lifted, the bottom of the topmost bottom plate and the middle plate are flush with the top of the inner baffle 7. A pushing hydraulic cylinder 9 is installed on the outer baffle 7 by bolt fastening. When the pushing hydraulic cylinder 9 is lifted, the bottom plate or the middle plate on the placement plate 6 is pushed to the middle to the lifting frame 2 for transportation. At the top of the lifting frame 2 are multiple conveying rollers 3 arranged side by side. The two ends of the conveying rollers 3 are installed on the lifting frame 2 through bearings. The multiple conveying rollers 3 are driven by a motor, so that the middle plate or the bottom plate on the conveyor belt lifting frame 2 is transported.

[0030] There are two groups of spot welding mechanisms 42, and the two groups of spot welding mechanisms 42 are located on both sides of the middle plate, so that the places where the two ends of the middle plate contact the bottom plate are welded respectively. Each group of spot welding mechanisms 42 is two welding assemblies 43 arranged side by side. Each welding assembly 43 includes a friction wheel 44 and a retractable welding gun 53. A friction wheel 44 that moves with the clamping wheel 35 is installed on the clamping seat 36. The two friction wheels 44 are respectively located on the left and right sides of the clamping wheel 35. When the clamping wheel 35 is against the middle plate, the friction wheel 44 contacts the middle plate. A downward extending vertical shaft 45 is installed on the clamping seat 36 through a bearing. The friction wheel 44 is installed on the vertical shaft 45 for rotation, and a one-way bearing is sleeved between the friction wheel 44 and the vertical shaft 45. , the one-way bearing limits the synchronous rotation of the friction wheel 44 and the vertical shaft 45. When the bottom plate is transported from left to right, the bottom plate and the middle plate on the left side of the clamping wheel 35 have not been assembled, so welding cannot be performed. In this way, the friction wheel 44 on the left side of the clamping wheel 35 cannot drive the vertical shaft 45 to rotate, and the friction wheel 44 on the right side of the clamping wheel 35 drives the vertical shaft 45 to rotate synchronously; when the bottom plate is transported from right to left, the bottom plate and the middle plate on the right side of the clamping wheel 35 have not been assembled, so welding cannot be performed. In this way, the friction wheel 44 on the right side of the clamping wheel 35 cannot drive the vertical shaft 45 to rotate, and the friction wheel 44 on the left side of the clamping wheel 35 drives the vertical shaft 45 to rotate synchronously, which is how welding is performed after assembly;A welding seat 46 is provided below the clamping seat 36, and the welding seat 46 is welded and fixed to the bottom of the clamping seat 36 by welding. A welding gun 53 is mounted on the welding seat 46, and the welding gun 53 slides with the welding seat 46. The bottom of the vertical shaft 45 is mounted on the top surface of the welding seat 46 through a bearing. A cam 47 is mounted on the bottom of the vertical shaft 45 through a bearing. The cam 47 rotates relatively on the vertical shaft 45. A circular groove coaxial with the vertical shaft 45 is opened on the cam 47, and a second gear ring 48 is fixed on the inner wall of the circular groove by welding. A driving gear 49 is installed on the vertical shaft 45 by welding. The driving gear 49 is located in the circular groove. A planetary gear 50 meshing with the driving gear 49 and the second gear ring 48 is provided between the driving gear 49 and the second gear ring 48. The cam 47 is rotated by the planetary gear 50, and the planetary gear 50 is placed The high transmission ratio means that the shaft rotates multiple times, and the cam 47 rotates once, increasing the distance between the two welding spots. Multiple planetary gears 50 are mounted on the planetary carrier via bearings, and the planetary carrier is mounted on the welding seat 46 via bolts. An inclined slot 51 is formed on the welding seat 46, and a welding pen is inserted into the inclined slot 51, which slides along the inclined slot 51. A waist-shaped slot 52 is formed at the top of the welding seat 46 and communicates with the inclined slot 51. A vertical rod 54 is fixed to the top of the welding pen, which slides in the waist-shaped hole. The vertical rod 54 fits against the outer wall of the cam 47, and a compression spring 55 is embedded in the waist-shaped hole. The compression spring 55 presses the vertical rod 54 against the outer wall of the cam 47. When the oblong portion of the cam 47 contacts the vertical rod 54, the vertical rod moves outward, and at the same time, the welding pen moves obliquely downward, so that the tip of the welding pen contacts the fitting portion of the middle plate and the bottom plate to perform welding, thus completing the spot welding.

[0031] In this application, automatic assembly is achieved through PLC control. Each hydraulic cylinder is connected to a servo valve, and each hydraulic cylinder is connected to the hydraulic system through the servo valve. Multiple servo valves are connected to the output end of the PLC controller, and multiple stepper motors are installed with encoders, and multiple encoders are connected to the output end of the PLC controller. In this way, automatic assembly welding is achieved by controlling the working sequence and time of the hydraulic cylinder and the stepper motor through the PLC.

Claims

1. An automatic assembly mechanism for I-beams, comprising a plate supply mechanism, a swing mechanism, a plate conveying mechanism, an assembly mechanism, and a spot welding mechanism. The plate supply mechanisms are provided at both ends of the plate conveying mechanism, and the swing mechanism is provided on the plate conveying mechanism. The plate conveying mechanism comprises two upper and lower groups. A rotating assembly is installed between the plate conveying mechanism and the ground, and the plate conveying mechanism is rotated by the rotating assembly. The plate conveying mechanism is separated into two sections, and an assembly mechanism is provided between the two sections of the plate conveying mechanism. A spot welding mechanism is installed on the assembly mechanism. It is characterized in that The plate conveying mechanism consists of an upper conveying assembly, a lower conveying assembly and a pressing assembly. The upper conveying assembly and the lower conveying assembly are arranged opposite to each other in an upper and lower direction. The upper conveying assembly and the lower conveying assembly are fixed. An adjustable pressing assembly is provided between the upper conveying assembly and the lower conveying assembly. The pressing assembly presses the plate onto the upper conveying assembly and the lower conveying assembly for conveyance. A swing mechanism is provided between the upper conveying assembly and the lower conveying assembly. The swing mechanism limits the position of the middle plate. Two groups of spot welding mechanisms are arranged at the assembly mechanism, and the spot welding mechanisms spot weld the connection between the middle plate and the bottom plate.

2. The automatic assembly mechanism for I-beams according to claim 1, characterized in that: The assembly mechanism includes a frame, bottom rollers, pressure rollers and clamping wheels. Multiple bottom rollers are arranged side by side and both ends of the bottom rollers are installed on the frame. The tops of multiple bottom rollers are flush with the plate conveying mechanism. Multiple bottom rollers are driven by motors. A pressure roller that can be raised and lowered is provided on the frame above the bottom rollers. The clamping wheels are located between the bottom rollers and the pressure rollers. The clamping wheels are divided into two groups and the two groups of clamping wheels clamp the bottom plate and the middle plate on both sides. Each group of clamping wheels is installed on a clamping seat. A clamping module is installed on the clamping seat. The clamping wheels clamp the middle plate through the clamping module, and the middle plate is pressed down to fit the bottom plate through the pressure rollers. Limiting wheels are installed on the inner walls on both sides of the frame fastened with bolts, and the limiting wheels limit the two sides of the bottom plate to ensure the relative position of the middle plate and the bottom plate.

3. The automatic assembly mechanism for I-beams according to claim 2, characterized in that: The upper conveying assembly and the lower conveying assembly are composed of multiple conveying circular rollers arranged side by side, and the upper conveying assembly and the lower conveying assembly are installed on the frame through bearings on both sides of the upper conveying assembly and the lower conveying assembly. The upper conveying assembly and the frame of the lower conveying assembly are connected by a connecting frame. A semicircular sliding seat is installed on the ground, and a circular track is clamped on the sliding seat. The circular track rotates on the sliding seat. The frame is fixed to the inner wall of the circular track, and a gear ring is installed on the circular slide rail. The two frames of the lower conveying assembly are fixed with a mounting plate, and a stepper motor is fixed on the mounting plate. A driving gear meshing with the first gear ring is installed on the output shaft of the stepper motor; the clamping assembly includes a swing arm and a pressure wheel, and multiple groups of swing arms are installed on the connecting frame, each group of swing arms is two and the two swing arms are rotatably connected to the connecting frame, and a pressure wheel is installed on the other end of each swing arm, and a first hydraulic cylinder is installed on the connecting frame, and a connecting piece is hinged between the piston rod of the first hydraulic cylinder and each swing arm.

4. The automatic assembly mechanism for I-beams according to claim 3, characterized in that: The swinging mechanism is installed on the connecting frames on both sides, and the middle plate is clamped by the swinging mechanism. The swinging mechanism includes a clamping rod and a clamping wheel, wherein a rotating rod is installed on the frame of the upper conveying assembly and the lower conveying assembly, and both ends of the rotating rod are rotatably connected to the frame, a clamping rod is installed on the rotating rod, and a clamping wheel is installed on the other end of the clamping rod. A second hydraulic cylinder is installed on the frame, and a sliding sleeve that slides with the frame is provided on one side of the clamping rod, and a pull rod is provided between the sliding sleeve and the clamping rod. A second hydraulic cylinder is installed on the mounting plate of the frame, and a pushing frame is installed on the piston rod of the second hydraulic cylinder. The two ends of the pushing frame are fixed to the sliding sleeve, and the movement of the two sliding sleeves is realized by the second hydraulic cylinder.

5. The automatic assembly mechanism for I-beams according to claim 4, characterized in that: The plate supply mechanism includes a lifting frame, conveyor rollers and a plate storage assembly, wherein plate storage assemblies are arranged on both sides of the lifting frame, and two groups of plate storage assemblies are respectively placed on the middle plate and the bottom plate, and the plate storage assembly includes a placement plate and a baffle, wherein a placement plate is arranged on the ground, and vertically arranged baffles are arranged on the ground on both sides of the placement plate, and multiple groups of third hydraulic cylinders are arranged between the placement plate and the ground, wherein the baffle located on the outside of the placement plate is higher than the baffle located on the inside, and a pushing hydraulic cylinder is installed on the outer baffle, and the plate is pushed onto the lifting frame by the pushing hydraulic cylinder, and the top of the lifting frame is provided with multiple conveyor rollers arranged side by side, and the multiple conveyor rollers are driven by a motor, and a jacking assembly is provided at the bottom of the lifting frame, and the lifting of the lifting frame is realized by the jacking assembly, and the conveyor rollers are driven to rotate by the motor.

6. The automatic assembly mechanism for I-beams according to claim 5, characterized in that: There are two groups of spot welding mechanisms, and the two groups of spot welding mechanisms are located on both sides of the middle plate. Each group of spot welding mechanisms is two welding assemblies arranged side by side. Each welding assembly includes a friction wheel and a retractable welding gun. Friction wheels that move with the clamping wheel are installed on the clamping seat. The friction wheels are located on both sides of the clamping wheel. When the clamping wheel is against the middle plate, the friction wheels contact the middle plate. A downwardly extending vertical shaft is installed on the clamping seat through a bearing. The friction wheel is installed on the vertical shaft for rotation. A one-way bearing is provided between the friction wheel and the vertical shaft. A welding seat is provided below the clamping seat. The welding gun is installed on the welding seat. The welding gun and the welding seat are slidably matched. The bottom of the vertical shaft is installed on the welding seat through a bearing On the seat, a cam is installed at the bottom of the vertical shaft through a bearing, a circular groove coaxial with the vertical shaft is opened on the cam, a second gear ring is fixed on the inner wall of the circular groove, a driving gear is installed on the vertical shaft, a planetary gear meshing with the driving gear and the second gear ring is provided between the driving gear and the second gear ring, multiple planetary gears are installed on the welding seat through bearings, an inclined slide is provided on the welding seat, a welding pen is inserted in the inclined slide, a waist-shaped groove connected to the inclined slide is opened on the top of the welding seat, a vertical rod is fixed on the top of the welding pen, the vertical rod slides in the waist-shaped hole, the vertical rod fits against the outer wall of the cam, a compression spring is embedded in the waist-shaped hole, and the vertical rod is pressed against the outer wall of the cam by the compression spring.

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