A fully automatic riveting machine

Abstract

This invention discloses a fully automatic riveting machine, including a chassis. Symmetrical fixed frames are fixedly connected to the upper center of the chassis. Symmetrical moving plates are movably connected to the upper end of the chassis. Linear guide rails are fixedly connected to the upper center of the moving plates. Symmetrical moving base plates are slidably connected to the upper end of the moving plates. Symmetrical riveting machine frames are movably connected to the upper end of the moving base plates. A riveting mechanism for automatically screening and conveying rivets is provided on one side of the riveting machine frame. This invention meets the processing requirements of riveting holes at different positions on sheet metal, significantly improving the equipment's versatility. It uses a vibratory feeder for automatic sorting and feeding, combined with transverse and longitudinal feeding cylinders to achieve orderly feeding of single rivets. The feeding plate end has grooves adapted to the rivets to prevent rivet deviation, rotation, and tilting. A negative pressure adsorption mechanism vertically and stably adsorbs the rivets, ensuring that the rivets are always fed into the riveting holes in a vertical state, resulting in smooth and reliable feeding.

Description

Technical Field

[0001] This invention relates to the field of sheet metal riveting technology, specifically a fully automatic riveting machine. Background Technology

[0002] Riveting is a mechanical connection method that uses the plastic deformation of rivets to permanently fasten components. It has advantages such as simple structure, reliable connection, vibration resistance, low cost, and wide applicability to materials. It is one of the most classic and widely used connection technologies in the industrial manufacturing field. Its basic principle is: inserting the rivet into the pre-made hole of the connected parts, and using hammering, pressure or special tools to cause plastic deformation of the rivet tail to form an upset head, so that the rivet shank fits tightly with the hole wall, producing an interference fit, thereby realizing the transmission and fixation of force.

[0003] In the existing technology, during the riveting process of the left and right panels of the inner liner of a home appliance, it is necessary to manually place rivets into the riveting holes of the panels and then use mechanical equipment to press the rivets to complete the riveting process of the left and right panels of the inner liner. However, the riveting process has a long production line span, the time spent manually placing rivets is long, and rivets are prone to falling off, resulting in low riveting efficiency of the panels. Summary of the Invention

[0004] The purpose of this invention is to provide a fully automatic riveting machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fully automatic riveting machine includes a chassis, with symmetrical fixed frames fixedly connected to the upper center of the chassis, symmetrical movable plates movably connected to the upper end of the chassis, linear guide rails fixedly connected to the upper center of the movable plates, symmetrical movable base plates slidably connected to the upper end of the movable plates, and symmetrical riveting machine frames movably connected to the upper end of the movable base plates. A riveting mechanism for automatically screening and conveying rivets is provided on one side of the riveting machine frame.

[0007] As a further aspect of the present invention: a placement plate is fixedly connected to the upper end of the fixed frame, and symmetrical positioning brackets are fixedly connected to the upper end of the movable plate near the fixed frame. A pressing frame is fixedly connected to the middle of the upper end of the chassis, and a pressing cylinder is drivenly connected to the upper side of the pressing frame. A lower pad is provided below the pressing cylinder, and the lower pad is fixedly connected to the pressing frame. A belt is fixedly connected between the positioning bracket and the side wall of the lower pad.

[0008] As a further aspect of the present invention: a secondary drag chain assembly is driven to the upper side of the movable base plate away from the fixed frame; symmetrical fixed seats are fixedly connected to the middle of both sides of the upper end of the chassis; a roller screw is rotatably connected to the middle of the symmetrical fixed seats; a nut support is driven to the outer wall of the roller screw; the upper end of the nut support is fixedly connected to the middle of the lower end of the movable plate; symmetrical servo motors are driven to the middle of the upper end of the chassis; the output end of the servo motors is fixedly connected to the middle of the roller screw; and a main drag chain assembly is driven to the lower end of the movable plate near the secondary drag chain assembly and the upper surface of the chassis.

[0009] As a further aspect of the present invention: two sets of symmetrical movable supports are fixedly connected to the side of the movable base plate away from the auxiliary drag chain assembly, and symmetrical rollers are rotatably connected to the side of the movable supports away from the riveting machine frame. The riveting machine frame is located between two adjacent sets of movable supports, and the belt is in drive engagement with the rollers on the two sets of symmetrical movable supports.

[0010] As a further embodiment of the present invention: the riveting mechanism includes a material selection vibratory plate, an mounting plate is fixedly connected to the side of the riveting machine frame near the auxiliary drag chain assembly, the material selection vibratory plate is fixedly installed in the upper middle part of the mounting plate, a vibrator is fixedly connected to the middle part of the movable bracket, a feeding track is fixedly connected to the upper end of the material selection vibratory plate near the feeding block, and the vibrator is located below the feeding track.

[0011] As a further aspect of the present invention: a riveting booster cylinder is drivenly connected to the upper end of the riveting machine frame near the movable support, an upper riveting block is fixedly connected to the output end of the riveting booster cylinder, an installation block is vertically slidably connected to the bottom of the inner cavity of the riveting machine frame, a lower riveting block is fixedly connected to the middle of the upper end of the installation block near the movable support, a feeding block is fixedly connected to the upper end of the lower riveting block near the material selection vibrating plate, and the center of the upper riveting block is aligned with the center of the lower riveting block.

[0012] As a further aspect of the present invention: a feeding groove is provided at the upper end of the feeding block, the feeding groove is an L-shaped groove, the end of the feeding track away from the material selection vibrating plate is in contact with the side wall of the feeding block, the inner cavity of the feeding track is connected to the feeding groove, a receiving groove is provided at the middle of the upper end of the riveting block, the side of the receiving groove near the feeding block is connected to the inner cavity of the feeding groove, a lifting feeding cylinder is driven connected to one side of the lower part of the riveting machine frame, symmetrical riveting lifting cylinders are driven connected to both sides of the lower end of the riveting machine frame, the bottom of the riveting machine frame is driven connected to the middle of the upper end of the moving base plate through a servo walking mechanism, a transmission groove is provided at the lower end of the mounting block near the lifting feeding cylinder, a U-shaped block is fixedly connected to the output end of the lifting feeding cylinder, and the U-shaped block slides vertically with the transmission groove.

[0013] As a further aspect of the present invention: a transverse feeding cylinder is driven to the middle of the side of the feeding block near the material selection vibratory plate, and a transverse feeding plate is fixedly connected to the output end of the transverse feeding cylinder. The transverse feeding plate is slidably connected to the inner cavity of the feeding trough. A longitudinal feeding cylinder is driven to the middle of the side of the feeding block away from the lower riveting block, and a longitudinal feeding plate is fixedly connected to the output end of the longitudinal feeding cylinder. The end of the longitudinal feeding plate away from the longitudinal feeding cylinder is slidably connected to the inner cavity of the feeding trough.

[0014] As a further aspect of the present invention: a negative pressure chamber is provided in the middle of the inner cavity of the receiving groove, and symmetrical upper and lower air holes are provided on the outer wall of the lower riveting block. A positioning plate is fixedly connected to the lower part of the inner cavity of the negative pressure chamber, and a piston is vertically slidably connected to the middle of the positioning plate. The top of the piston is located below the upper air hole, and the lower air hole is located below the positioning plate. The outer wall of the piston and the upper end face of the positioning plate are elastically connected by a spring. A symmetrical moving groove is provided in the middle of the upper end of the lower riveting block, and a sealing plate is vertically slidably connected to the inner cavity of the moving groove. A vent hole is provided in the middle of the lower side of the sealing plate.

[0015] As a further aspect of the present invention: a traction rope is fixedly connected to the lower middle part of the piston, and a drive rod is fixedly connected to the end of the traction rope away from the piston. The drive rod is located in the middle part of the inner cavity of the transmission groove near the lower riveting block. The drive rod is horizontally slidably connected to the inner cavity of the mounting block. The traction rope is slidably engaged with the mounting block. The end of the drive rod away from the traction rope is located in the inner cavity of the transmission groove. The driven rod is fixedly connected to a driven rod at the end away from the traction rope. The inner cavity sidewall of the U-shaped block is provided with symmetrical inclined grooves. The two ends of the driven rod are slidably connected in the symmetrical inclined grooves.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The servo motor drives the ball screw to adjust the width of the moving plate, and the moving base plate adjusts the length along the linear guide rail. This allows it to adapt to plates of different lengths and widths, meeting the processing requirements of rivet holes at different positions on the plates and greatly improving the equipment's versatility. A vibratory feeder automatically sorts and feeds the rivets, with horizontal and vertical feeding cylinders ensuring orderly feeding of individual rivets. The feeding plate has grooves at the ends to match the rivets, preventing rivet offset, rotation, and tipping. A negative pressure adsorption mechanism vertically and stably adsorbs the rivets, ensuring they are always fed vertically into the rivet holes, resulting in smooth and reliable feeding. A U-shaped block and inclined groove mechanical linkage structure enables orderly actions: first adsorbing the rivets, then lifting and feeding them, and finally automatically releasing the negative pressure after riveting. From plate loading, centering, clamping, to automatic rivet sorting, conveying, lifting, riveting, and resetting, the entire process is automated, eliminating the need for manual feeding and alignment, significantly reducing labor intensity and greatly improving continuous production efficiency and processing consistency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the chassis structure in this invention.

[0020] Figure 3 This is a schematic diagram of the structure of the fixing frame in this invention.

[0021] Figure 4 This is a schematic diagram of the structure of the movable support in this invention.

[0022] Figure 5 This is a schematic diagram of the material pressing frame in this invention.

[0023] Figure 6 This is a schematic diagram of the ball screw structure in this invention.

[0024] Figure 7 This is a schematic diagram of the riveting mechanism in this invention.

[0025] Figure 8 For the present invention Figure 1 A schematic diagram of the structure of area A in the middle.

[0026] Figure 9 This is a schematic diagram of the material selection vibratory feeder in this invention.

[0027] Figure 10 This is a schematic diagram of the mounting block in this invention.

[0028] Figure 11 This is a schematic diagram of the internal structure of the riveting block of the present invention.

[0029] In the diagram: 1. Chassis; 2. Fixing frame; 3. Placement plate; 4. Servo motor; 5. Secondary drag chain assembly; 6. Main drag chain assembly; 7. Moving plate; 8. Linear guide rail; 9. Pressing frame; 10. Pressing cylinder; 11. Lower pad block; 12. Roller screw; 13. Nut support; 14. Fixing seat; 15. Positioning bracket; 16. Moving bracket; 17. Belt; 18. Riveting machine frame; 19. Material selection vibratory plate; 20. Vibrator; 21. Feeding track; 22. Riveting booster cylinder; 23. Mounting plate; 24. Upper riveting block; 25. Lower riveting block; 26. Feeding block 27. Lateral feeding cylinder; 28. Mounting block; 29. ​​Lifting feeding cylinder; 30. Riveting lifting cylinder; 31. Moving base plate; 32. Servo walking mechanism; 33. Lateral feeding plate; 34. Longitudinal feeding plate; 35. Longitudinal feeding cylinder; 36. Feeding trough; 37. Traction rope; 38. U-shaped block; 39. Transmission groove; 40. Drive rod; 41. Inclined groove; 42. Driven rod; 43. Upper air hole; 44. Lower air hole; 45. Sealing plate; 46. Receiving groove; 47. Negative pressure chamber; 48. Vent hole; 49. Positioning plate; 50. Piston; 51. Moving groove. Detailed Implementation

[0030] Please see Figure 1-3 In this embodiment of the invention, a fully automatic riveting machine includes a chassis 1. A symmetrical fixed frame 2 is fixedly connected to the upper middle part of the chassis 1. A symmetrical movable plate 7 is movably connected to the upper end of the chassis 1. A linear guide rail 8 is fixedly connected to the upper middle part of the movable plate 7. A symmetrical movable base plate 31 is slidably connected to the upper end of the movable plate 7. The movable base plate 31 is driven to reciprocate in the horizontal direction by the linear guide rail 8. A symmetrical riveting machine frame 18 is movably connected to the upper end of the movable base plate 31. A riveting mechanism for automatically screening and conveying rivets is provided on one side of the riveting machine frame 18.

[0031] Please see Figure 2-6The upper end of the fixed frame 2 is fixedly connected to a placement plate 3. A symmetrical positioning bracket 15 is fixedly connected to the upper end of the movable plate 7 near the fixed frame 2. A belt 17 is fixedly connected to the upper end of the positioning bracket 15. A secondary drag chain assembly 5 is driven to the upper end of the movable base plate 31 away from the fixed frame 2. The movable base plate 31 is driven to reciprocate horizontally via a linear guide rail 8, thereby driving the riveting machine frame 18 to move horizontally synchronously. This adapts to plates of different lengths and enables riveting of plates of different lengths. The cooperation of the fixed frame 2, placement plate 3, positioning bracket 15, and belt 17 allows for precise control of the plate during the riveting process. For support, a pressure frame 9 is fixedly connected to the upper middle part of the chassis 1. A pressure cylinder 10 is drivenly connected to one side of the upper end of the pressure frame 9. A lower pad 11 is provided below the pressure cylinder 10. The lower pad 11 is fixedly connected to the pressure frame 9. The end of the belt 17 away from the positioning bracket 15 is fixedly connected to the side wall of the lower pad 11, and the upper end face of the lower pad 11 coincides with the upper end face of the belt 17. The plate placed on the belt 17 can be clamped and fixed by the cooperation of the pressure cylinder 10 and the lower pad 11, ensuring that the plate does not shake when the moving base plate 31 drives the riveting mechanism to move, and ensuring that the rivets can accurately enter the riveting holes on the plate.

[0032] Please see Figure 6 Symmetrical fixed seats 14 are fixedly connected to the middle of both sides of the upper end of the chassis 1. A roller screw 12 is rotatably connected to the middle of the symmetrical fixed seats 14. A nut support 13 is driven to the outer wall of the roller screw 12. The upper end of the nut support 13 is fixedly connected to the middle of the lower end of the moving plate 7. Symmetrical servo motors 4 are driven to the middle of the upper end of the chassis 1. The output end of the servo motor 4 is fixedly connected to the middle of the roller screw 12. The roller screw 12 can be driven to rotate by the servo motor 4, thereby driving the nut support. 13 reciprocates horizontally on the outer wall of the roller screw 12, thereby driving the moving plate 7 to reciprocate horizontally synchronously with the nut support 13, thus adapting to plates of different widths and the positions of rivet holes at different locations on the plates. The lower end of the moving plate 7, near the auxiliary drag chain assembly 5, is connected to the upper end face of the chassis 1 via a main drag chain assembly 6. Through the symmetrical cooperation of the main drag chain assembly 6 with the roller screw 12 and the nut support 13, the moving plate 7 can be smoothly driven to move horizontally closer to / away from the location of the belt 17.

[0033] Two sets of symmetrical movable supports 16 are fixedly connected to the side of the movable base plate 31 away from the auxiliary drag chain assembly 5. Symmetrical rollers are rotatably connected to the side of the movable supports 16 away from the riveting machine frame 18. The riveting machine frame 18 is located between two adjacent sets of movable supports 16. The belt 17 engages with the rollers on the two sets of symmetrical movable supports 16 to ensure that the belt 17 continuously supports the plate material as the movable supports 16 move horizontally with the movable base plate 31. Meanwhile, the chassis 1 reciprocates horizontally under the action of the roller screw 12 and the nut support 13, symmetrically... The positioning bracket 15, the movable bracket 16, the movable base plate 31, the pressing frame 9, and the lower pad 11 can move horizontally and reciprocally synchronously. The pressing cylinder 10 and the lower pad 11 clamp and fix the plate, ensuring that the pressing cylinder 10 and the lower pad 11 can clamp and fix plates of different widths. During the loading process, after the plate is placed on the placement plates 3 on both sides, the plate is pushed towards the position of the pressing frame 9 by symmetrical robotic arms, thereby centering and positioning the plate while loading it. Loading and unloading the plate by robotic arms is a commonly used technical means in the prior art.

[0034] Please see Figure 1 and Figure 7-9 The riveting mechanism includes a material selection vibratory feeder 19, capable of handling up to 500 rivets and automatically correcting the material orientation. A mounting plate 23 is fixedly connected to the side of the riveting machine frame 18 near the auxiliary drag chain assembly 5. The material selection vibratory feeder 19 is fixedly mounted on the upper middle part of the mounting plate 23. A vibrator 20 is fixedly connected to the middle of the movable support 16. A riveting booster cylinder 22 is drivenly connected to the upper end of the riveting machine frame 18 near the movable support 16. An upper riveting block 24 is fixedly connected to the output end of the riveting booster cylinder 22. A mounting block 28 is vertically slidably connected to the bottom of the inner cavity of the riveting machine frame 18. A lower riveting block 25 is fixedly connected to the middle of the upper end of the mounting block 28 near the movable support 16. The upper end of the lower riveting block 25 is near the material selection vibratory feeder... A feeding block 26 is fixedly connected to one side of the disc 19. A feeding groove 36 is opened at the upper end of the feeding block 26. The feeding groove 36 is an L-shaped groove. A feeding track 21 is fixedly connected to the upper end of the material selection vibrating disc 19 near the feeding block 26. The end of the feeding track 21 away from the material selection vibrating disc 19 is in contact with the side wall of the feeding block 26. The inner cavity of the feeding track 21 is connected to the feeding groove 36 to ensure that the rivets can enter the inner cavity of the feeding groove 36 from the inner cavity of the feeding track 21. Vibration is provided by the vibrator 20 to make the rivets in the material selection vibrating disc 19 orderly fed out and closely arranged in the inner cavity of the feeding track 21. Under the action of vibration, the rivets will enter the inner cavity of the feeding groove 36 from the inner cavity of the feeding track 21 in turn.

[0035] Please see Figure 7-9The center of the upper riveting block 24 is aligned with the center of the lower riveting block 25. A receiving groove 46 is provided in the middle of the upper end of the lower riveting block 25. The side of the receiving groove 46 near the feeding block 26 is connected to the inner cavity of the feeding groove 36. A lifting feeding cylinder 29 is connected to the lower part of the riveting machine frame 18 away from the auxiliary drag chain assembly 5. The lifting feeding cylinder 29 is used to push the mounting block 28, the feeding block 26 and the lower riveting block 25 to move synchronously in the vertical direction, thereby pushing the rivet above the lower riveting block 25 and close to the position of the upper riveting block 24. As the rivet moves upward with the lower riveting block 25, the rivet will pass through the riveting hole on the plate. Then, the upper riveting block 24 is driven to move vertically downward by the riveting booster cylinder 22. As the upper riveting block 24 approaches the plate, it will squeeze the rivet to complete the riveting process of the plate.

[0036] Symmetrical riveting lifting cylinders 30 are driven to both sides of the lower end of the riveting machine frame 18. The riveting lifting cylinders 30 can drive the riveting machine frame 18 to move vertically. The side walls of the riveting lifting cylinders 30 are fixed to the lower sides of the riveting machine frame 18, and their output ends are in contact with the moving base plate 31. When working, the riveting lifting cylinders 30 can drive the riveting machine frame 18 to move vertically upward. Through the cooperation of the riveting booster cylinder 22 and the riveting lifting cylinders 30, pressure can be applied to both the upper and lower sides of the rivet at the same time, thereby ensuring that the rivet can be riveted stably and firmly. The bottom of the riveting machine frame 18 and the upper middle part of the moving base plate 31 are connected by a servo walking mechanism 32. The servo walking mechanism 32 is a commonly used technical means in the prior art. The servo walking mechanism is a walking mechanism driven by a servo motor and closed-loop feedback, which can achieve high-precision positioning, speed adjustment and synchronization during movement, thereby ensuring that the rivet can accurately pass through multiple riveting holes on the plate.

[0037] The symmetrical riveting lifting cylinders 30 drive the riveting machine frame 18, material selection vibratory plate 19, feeding track 21, feeding block 26, and lower riveting block 25 to move vertically upwards synchronously, providing sufficient upward pressure during the riveting process. The riveting booster cylinder 22 and the upper riveting block 24 provide sufficient riveting pressure to the rivets, ensuring a good riveting effect. Furthermore, the servo walking mechanism 32 allows for fine-tuning of the positions of the lower riveting block 25 and the rivets, ensuring precise entry of the rivets. Inside the riveting hole, the lower end of the mounting block 28 near the lifting and feeding cylinder 29 has a transmission groove 39. The output end of the lifting and feeding cylinder 29 is fixedly connected to a U-shaped block 38. The U-shaped block 38 and the transmission groove 39 slide vertically together. When the lifting and feeding cylinder 29 pushes the U-shaped block 38 to the top, it will push the mounting block 28 to move upward. Then, the mounting block 28, the feeding block 26 and the lower riveting block 25 will move upward synchronously under the pushing action of the U-shaped block 38, thereby driving the rivet to move upward and pass through the riveting hole, thus facilitating the riveting process of the sheet metal.

[0038] Please see Figure 8 A transverse feeding cylinder 27 is connected to the middle of the feeding block 26 near the material selection vibratory plate 19. A transverse feeding plate 33 is fixedly connected to the output end of the transverse feeding cylinder 27. The transverse feeding plate 33 is slidably connected to the inner cavity of the feeding groove 36. When the rivet enters the inner cavity of the feeding groove 36 from the inner cavity of the feeding track 21, the end of the transverse feeding plate 33 away from the transverse feeding cylinder 27 will contact the side wall of the rivet. During the process of the transverse feeding cylinder 27 driving the transverse feeding plate 33 to move horizontally, the transverse feeding plate 33 will push the rivet horizontally closer to the position of the lower riveting block 25 in the inner cavity of the feeding groove 36, that is, at the corner of the inner cavity of the feeding groove 36, on the side of the feeding block 26 away from the lower riveting block 25. A longitudinal feeding cylinder 35 is connected to the central transmission. A longitudinal feeding plate 34 is fixedly connected to the output end of the longitudinal feeding cylinder 35. The end of the longitudinal feeding plate 34 away from the longitudinal feeding cylinder 35 is also slidably connected to the inner cavity of the feeding groove 36. After the rivet is pushed to the corner of the inner cavity of the feeding groove 36 by the transverse feeding plate 33, the rivet will contact the end of the longitudinal feeding plate 34 away from the longitudinal feeding cylinder 35. During the process of the transverse feeding plate 33 pushing the rivet to move, the side wall of the transverse feeding plate 33 will fit with the outlet of the feeding track 21 to ensure that only a single rivet enters the inner cavity of the feeding groove 36 at a time. Only after the transverse feeding plate 33 is reset will a rivet re-enter the feeding groove 36.

[0039] Furthermore, both the transverse feeding plate 33 and the longitudinal feeding plate 34 have grooves at their ends that are adapted to the shape of the rivet. This ensures that the rivet will not shift or rotate during the pushing process of the transverse feeding plate 33 and the longitudinal feeding plate 34, thereby ensuring the stability of the rivet during movement. The rivet will not tip over and can be inserted into the riveting hole in a vertical position. The longitudinal feeding plate 34 can push the rivet into the inner cavity of the receiving groove 46. A negative pressure chamber 47 is provided in the middle of the inner cavity of the receiving groove 46. The outer wall of the lower riveting block 25 has symmetrical upper air holes 43 and lower air holes 44. The lower air hole 44 is located below the upper air hole 43. The inner cavity of the negative pressure chamber 47 is... A positioning plate 49 is fixedly connected to the lower part of the cavity. A piston 50 is vertically slidably connected to the middle part of the positioning plate 49. The top of the piston 50 is located below the upper air hole 43, and the lower air hole 44 is located below the positioning plate 49. The outer wall of the piston 50 and the upper end face of the positioning plate 49 are elastically connected by a spring. When the rivet is located in the inner cavity of the receiving groove 46, the rivet will block the top of the negative pressure cavity 47. At this time, when the piston 50 moves vertically downward in the inner cavity of the negative pressure cavity 47, a negative pressure will be formed in the upper part of the inner cavity of the negative pressure cavity 47, thereby performing negative pressure adsorption and fixation on the rivet, ensuring that the rivet remains stable and does not tip over when it is vertically conveyed upward.

[0040] Please see Figure 10-11A symmetrical moving groove 51 is provided in the middle of the upper end of the lower riveting block 25. A sealing plate 45 is vertically slidably connected to the inner cavity of the moving groove 51. The lower end face of the sealing plate 45 is elastically connected to the bottom of the inner cavity of the moving groove 51 by a spring. A vent hole 48 is provided in the middle of the lower side of the sealing plate 45. When the bottom of the sealing plate 45 is far away from the bottom of the inner cavity of the moving groove 51, the vent hole 48 is located above the upper vent hole 43. Therefore, the lower side of the sealing plate 45 will block the upper vent hole 43, ensuring that the piston 50 can be attracted and fixed when it moves down. The opening of the lower vent hole 44 ensures that the piston 50 can move smoothly during the downward movement. A traction rope 37 is fixedly connected to the middle of the lower end of the piston 50. A drive rod 40 is fixedly connected to the end of the traction rope 37 away from the piston 50.

[0041] The drive rod 40 is located in the middle of the inner cavity of the transmission groove 39, near the lower riveting block 25. The drive rod 40 is horizontally slidably connected to the inner cavity of the mounting block 28. The traction rope 37 is slidably engaged with the mounting block 28. The end of the drive rod 40 away from the traction rope 37 is located in the inner cavity of the transmission groove 39, and the end of the drive rod 40 away from the traction rope 37 is fixedly connected to the driven rod 42. The inner cavity sidewall of the U-shaped block 38 is provided with symmetrical inclined grooves 41. The two ends of the driven rod 42 are slidably connected in the symmetrical inclined grooves 41. Through the cooperation of the U-shaped block 38 and the inclined grooves 41, the lifting and feeding cylinder... The moment the U-shaped block 38 moves upward, the drive rod 40 moves horizontally away from the lower riveting block 25. This causes the piston 50 to move vertically downward in the inner cavity of the negative pressure chamber 47 via the traction rope 37. After the top of the U-shaped block 38 contacts the bottom of the inner cavity of the transmission groove 39, the drive rod 40, traction rope 37, and piston 50 remain stationary and move upward synchronously with the mounting block 28. This ensures that the upper part of the inner cavity of the negative pressure chamber 47 maintains a negative pressure as the rivet moves upward with the lower riveting block 25, thus stably adsorbing and fixing the rivet.

[0042] After the rivet is fed into the rivet hole, as the lower rivet block 25 continues to move upward, its top will fit against the bottom of the plate. During this process, the sealing plate 45 will move towards the bottom of the inner cavity of the moving groove 51 under the obstruction of the plate, thereby driving the sealing plate 45 and the vent 48 to move downward synchronously. After the vent 48 and the upper vent 43 coincide, the upper vent 43 will connect the inner cavity of the negative pressure chamber 47 to the outside, thereby relieving the negative pressure in the upper part of the negative pressure chamber 47. This ensures that the negative pressure in the inner cavity of the negative pressure chamber 47 can be relieved in time during the downward repositioning process of the lower rivet block 25, preventing the negative pressure chamber 47 from affecting the rivet. The adsorption of the vent hole 48 can release the adsorption between the lower rivet block 25 and the rivet during the riveting process. During the resetting process of the lower rivet block 25, although the sealing plate 45 will move upward under the action of the spring, causing the vent hole 48 to separate from the upper air hole 43 and thus re-blocking the upper air hole 43, the lower rivet block 25 has already separated from the rivet during the resetting process of the longitudinal feeding cylinder 35. Therefore, during the resetting process of the lower rivet block 25, there is no additional force between the rivet and the lower rivet block 25, so the riveting effect of the rivet will not be affected by the negative pressure adsorption force.

[0043] During the process of the lifting and feeding cylinder 29 driving the U-shaped block 38 to move down, the lower riveting block 25, the feeding block 26 and the mounting block 28 will move down synchronously. After the bottom of the mounting block 28 contacts the bottom of the inner cavity of the riveting machine frame 18, the piston 50, the drive rod 40 and the traction rope 37 will reset under the action of elasticity. At this time, the top of the negative pressure chamber 47 is not blocked by the rivet, so even if the upper air hole 43 is blocked by the air hole 48, the piston 50 can be reset smoothly. At the same time, it is convenient to transport the rivet to the inner cavity of the receiving groove 46 again through the horizontal feeding plate 33 and the vertical feeding plate 34, so as to perform vertical feeding of the rivet again, thereby automatically transporting the rivet and automatically riveting the plate.

Claims

1. A fully automatic riveting machine, including a chassis, characterized in that, A symmetrical fixed frame is fixedly connected to the upper middle part of the chassis, and a symmetrical movable plate is movably connected to the upper end of the chassis. A linear guide rail is fixedly connected to the upper middle part of the movable plate, and a symmetrical movable base plate is slidably connected to the upper end of the movable base plate. A symmetrical riveting machine frame is movably connected to the upper end of the movable base plate. A riveting mechanism for automatically screening and conveying rivets is provided on one side of the riveting machine frame.

2. The fully automatic riveting machine according to claim 1, characterized in that, A placement plate is fixedly connected to the upper end of the fixed frame. A symmetrical positioning bracket is fixedly connected to the upper end of the movable plate near the fixed frame. A pressing frame is fixedly connected to the middle of the upper end of the chassis. A pressing cylinder is drivenly connected to the upper side of the pressing frame. A lower pad is provided below the pressing cylinder. The lower pad is fixedly connected to the pressing frame. A belt is fixedly connected between the positioning bracket and the side wall of the lower pad.

3. The fully automatic riveting machine according to claim 2, characterized in that, A secondary cable chain assembly is driven to the upper side of the movable base plate away from the fixed frame. Symmetrical fixed seats are fixedly connected to the middle of both sides of the upper end of the chassis. A roller screw is rotatably connected to the middle of the symmetrical fixed seats. A nut support is driven to the outer wall of the roller screw. The upper end of the nut support is fixedly connected to the middle of the lower end of the movable plate. Symmetrical servo motors are driven to the middle of the upper end of the chassis. The output end of the servo motor is fixedly connected to the middle of the roller screw. A main cable chain assembly is driven to the lower end of the movable plate near the secondary cable chain assembly and the upper end surface of the chassis.

4. The fully automatic riveting machine according to claim 3, characterized in that, Two sets of symmetrical moving brackets are fixedly connected to the side of the movable base plate away from the auxiliary drag chain assembly. Symmetrical rollers are rotatably connected to the side of the moving brackets away from the riveting machine frame. The riveting machine frame is located between two adjacent sets of moving brackets. The belt is engaged with the rollers on the two sets of symmetrical moving brackets for transmission.

5. The fully automatic riveting machine according to claim 4, characterized in that, The riveting mechanism includes a material selection vibratory plate. A mounting plate is fixedly connected to the side of the riveting machine frame near the auxiliary drag chain assembly. The material selection vibratory plate is fixedly installed in the upper middle part of the mounting plate. A vibrator is fixedly connected to the middle part of the movable bracket. A feeding track is fixedly connected to the upper end of the material selection vibratory plate near the feeding block. The vibrator is located below the feeding track.

6. The fully automatic riveting machine according to claim 5, characterized in that, A riveting booster cylinder is connected to the upper end of the riveting machine frame near the movable support. An upper riveting block is fixedly connected to the output end of the riveting booster cylinder. An installation block is vertically slidably connected to the bottom of the inner cavity of the riveting machine frame. A lower riveting block is fixedly connected to the middle of the upper end of the installation block near the movable support. A feeding block is fixedly connected to the upper end of the lower riveting block near the material selection vibrating plate. The center of the upper riveting block is aligned with the center of the lower riveting block.

7. The fully automatic riveting machine according to claim 6, characterized in that, The upper end of the feeding block is provided with a feeding groove, which is an L-shaped groove. The end of the feeding track away from the material selection vibratory plate is attached to the side wall of the feeding block. The inner cavity of the feeding track is connected to the feeding groove. The upper middle part of the riveting block is provided with a receiving groove. The side of the receiving groove near the feeding block is connected to the inner cavity of the feeding groove. A lifting feeding cylinder is driven to one side of the lower part of the riveting machine frame. Symmetrical riveting lifting cylinders are driven to both sides of the lower part of the riveting machine frame. The bottom of the riveting machine frame is driven to the upper middle part of the moving base plate through a servo walking mechanism. The lower end of the mounting block is provided with a transmission groove near the lifting feeding cylinder. A U-shaped block is fixedly connected to the output end of the lifting feeding cylinder. The U-shaped block slides vertically with the transmission groove.

8. The fully automatic riveting machine according to claim 7, characterized in that, A transverse feeding cylinder is driven to the middle of the side of the feeding block closest to the material selection vibratory plate. A transverse feeding plate is fixedly connected to the output end of the transverse feeding cylinder. The transverse feeding plate is slidably connected to the inner cavity of the feeding trough. A longitudinal feeding cylinder is driven to the middle of the side of the feeding block away from the lower riveting block. A longitudinal feeding plate is fixedly connected to the output end of the longitudinal feeding cylinder. The end of the longitudinal feeding plate away from the longitudinal feeding cylinder is slidably connected to the inner cavity of the feeding trough.

9. The fully automatic riveting machine according to claim 7, characterized in that, A negative pressure chamber is provided in the middle of the inner cavity of the receiving groove. Symmetrical upper and lower air holes are provided on the outer wall of the lower riveting block. A positioning plate is fixedly connected to the lower part of the inner cavity of the negative pressure chamber. A piston is vertically slidably connected to the middle of the positioning plate. The top of the piston is located below the upper air hole, and the lower air hole is located below the positioning plate. The outer wall of the piston and the upper end face of the positioning plate are elastically connected by a spring. A symmetrical moving groove is provided in the middle of the upper end of the lower riveting block. A sealing plate is vertically slidably connected to the inner cavity of the moving groove. A vent hole is provided in the middle of the lower side of the sealing plate.

10. A fully automatic riveting machine according to claim 9, characterized in that, A traction rope is fixedly connected to the lower middle part of the piston. A drive rod is fixedly connected to the end of the traction rope away from the piston. The drive rod is located in the middle part of the inner cavity of the transmission groove near the lower riveting block. The drive rod is horizontally slidably connected to the inner cavity of the mounting block. The traction rope is slidably engaged with the mounting block. The end of the drive rod away from the traction rope is located in the inner cavity of the transmission groove. A driven rod is fixedly connected to the end of the drive rod away from the traction rope. A symmetrical inclined groove is opened on the inner side wall of the U-shaped block. The two ends of the driven rod are slidably connected in the symmetrical inclined groove.

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