Welding guide mechanical arm for batch processing of traffic signs

Abstract

The application discloses a kind of welding guide mechanical arm of intersection safety sign batch processing, it is related to manipulator technical field, including conveyer belt, sign transparent shell and sign base, the conveyer belt is installed with lower welding arm, air cylinder one is arranged between lower welding arm and conveyer belt, the top of lower welding arm is provided with guide clamping arm, the guide clamping arm includes the air cylinder two that the top of conveyer belt is provided with, the mounting bracket one that one end of air cylinder two is fixedly installed, the air cylinder three that is fixedly installed in the fixedly threaded of mounting bracket one, the mounting bracket two that the piston end of air cylinder three is fixedly installed, the mounting bracket three that is rotatably arranged in the bottom of mounting bracket two, and the tension detector and two telescopic rods three that are fixedly installed in the bottom of mounting bracket three, reduce the participation of staff in the welding process of sign base and sign transparent shell, guarantee the accuracy of guide positioning between sign transparent shell and sign base, reduce the possibility of structure damage on sign base.

Description

Technical Field

[0001] This invention relates to the field of robotic arm technology, specifically a welding guide robotic arm for the mass production of traffic safety signs. Background Technology

[0002] Traffic safety signs, also known as traffic signs, are an important part of road traffic management. They convey traffic rules and safety tips to drivers and pedestrians through graphics and text, provide road information, and act as a road language; they direct and control traffic to ensure traffic safety; and they provide directions to improve driving efficiency.

[0003] Traffic safety signs are graphic symbols that display traffic regulations and road information. They provide a vivid, concrete, and concise expression of traffic regulations. With technological advancements, LED light strips are now used to provide directional information, meeting the needs of nighttime guidance and improving the adaptability and controllability of traffic safety signs. However, when the LED light strips are installed on the sign base, improper operation during the welding process of aligning the transparent shell with the sign base can easily lead to displacement and damage to the LED light strips and other structures, affecting the welding speed and potentially causing economic losses. Summary of the Invention

[0004] The purpose of this invention is to provide a welding guide robotic arm for mass production of traffic safety signs, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding guide robotic arm for mass processing of traffic safety signs, comprising a conveyor belt, a transparent shell of the sign, and a sign base. A lower welding arm is mounted on the conveyor belt, and a pneumatic cylinder is disposed between the lower welding arm and the conveyor belt. A guide clamping arm is disposed at the top of the lower welding arm. The guide clamping arm includes a pneumatic cylinder two disposed at the top of the conveyor belt, a mounting frame one fixedly mounted at one end of the pneumatic cylinder two, a pneumatic cylinder three fixedly mounted on the mounting frame one, a mounting frame two fixedly mounted at the piston end of the pneumatic cylinder three, a mounting frame three rotatably disposed at the bottom of the mounting frame two, and a tension detector and two telescopic rods three fixedly mounted at the bottom of the mounting frame three. A mounting frame four is fixedly mounted at the bottom end of the tension detector, and a clamping assembly is mounted on the mounting frame four. A rotation control assembly is disposed between the mounting frame two and the mounting frame three.

[0006] Preferably, a fixing frame five is fixedly sleeved on the outer side of the pneumatic cylinder two, a guide frame is fixedly installed on one side of the fixing frame five, two guide rings are provided on both sides inside the guide frame, a telescopic rod two is fixedly inserted inside the guide ring, the outer shell of the telescopic rod two is fixedly inserted on the mounting frame one, and the piston end of the telescopic rod two is fixedly connected to the mounting frame two.

[0007] Preferably, the rotation control assembly includes a drive shaft rotatably connected to the bottom of the mounting frame two, a gear two fixedly mounted on the outside of the drive shaft, a gear one meshing on one side of the gear two, and a fixed frame six disposed on the outside of the gear two. The fixed frame six is ​​fixedly mounted on the bottom of the mounting frame two, and a plane bearing is fixedly mounted between the bottom of the fixed frame six and the mounting frame three. The top of the mounting frame three is provided with an annular groove, and both the plane bearing and the fixed frame six are disposed inside the annular groove.

[0008] Preferably, two fixed vertical plates are fixedly installed on the top of the second mounting bracket, and a second forward and reverse motor is fixedly installed between the two fixed vertical plates. The output end of the second forward and reverse motor passes through a first gear and is fixedly connected to the first gear. The bottom end of the transmission shaft is fixedly connected to the third mounting bracket. A groove is provided on the top of the third mounting bracket, and both the second gear and the first gear are located inside the groove.

[0009] Preferably, the piston ends of both telescopic rods are fixedly connected to the mounting frame four, and two support rods are fixedly installed at the bottom of the mounting frame three.

[0010] Preferably, the clamping assembly includes a vacuum pump fixedly mounted on the top of the mounting frame four, an air guide pipe fixedly mounted on the air inlet end of the vacuum pump, a solenoid valve fixedly mounted on one end of the air guide pipe, a manifold fixedly connected to the solenoid valve, and four vacuum pipes fixedly connected to the manifold. The manifold is fixedly mounted on the top of the mounting frame four, and the bottom end of the vacuum pipe passes through the mounting frame four and is fixedly mounted with a vacuum suction cup.

[0011] Preferably, the lower welding arm includes a mouth-shaped frame set at the top of the conveyor belt, four welding machines set inside the mouth-shaped frame, and a guide and calibration assembly set on the front side of the inner cavity of the mouth-shaped frame. A gearbox and a forward and reverse motor are set on the front and right sides of the mouth-shaped frame. The output end of the forward and reverse motor is fixedly connected to the input end of the gearbox on the same side. Multiple fixed short rods are fixedly installed between the forward and reverse motor and the gearbox and the mouth-shaped frame. Lead screws are fixedly installed on both output ends of the gearbox.

[0012] Preferably, the orifice frame has four guide cavities inside, and the four lead screws pass through the four guide cavities respectively. The lead screws are rotatably connected to the orifice frame. The two lead screws installed in the front gearbox are each fitted with a fixing bracket four through a nut pair on their outer sides. One end of the fixing bracket four extends to the outside of the guide cavity and is fixedly connected to the welding machine on the same side. The two lead screws installed in the right gearbox are each fitted with a fixing bracket three through a nut pair on their outer sides. One end of the fixing bracket three extends to the outside of the guide cavity and is fixedly connected to the welding machine on the same side.

[0013] Preferably, the guide alignment assembly includes a pneumatic cylinder four fixedly installed on the front side of the inner cavity of the orifice frame, a mounting frame five fixedly installed on the piston end of the pneumatic cylinder four, and a pneumatic cylinder five and a telescopic rod four fixedly installed on one side of the mounting frame five. A hollow frame is fixedly installed between the piston ends of the pneumatic cylinder five and the telescopic rod four. A pressure sensor is fixedly installed on the top of the hollow frame. A dual-axis pneumatic cylinder is fixedly installed inside the hollow frame. A sliding frame is fixedly installed on both piston ends of the dual-axis pneumatic cylinder. The sliding frame is slidably connected to the hollow frame. A pusher plate is fixedly installed on one side of the sliding frame.

[0014] Preferably, two fixing frames are fixedly installed on both sides of the orifice frame, and a fixing frame 1 is provided at the bottom of each of the two fixing frames 2. The fixing frame 1 is fixedly connected to the outer shell of the conveyor belt. Two telescopic rods 1 are fixedly inserted on one of the fixing frames 1. The piston ends of the two telescopic rods 1 are fixedly connected to the fixing frame 2 on the same side. The pneumatic cylinder 1 is fixedly inserted on the other fixing frame 1. The piston end of the pneumatic cylinder 1 is fixedly connected to the fixing frame 2 on the same side.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this application, the staff can edit the control program in advance according to the working requirements of the conveyor belt, pneumatic cylinder two, pneumatic cylinder three, air pump, air guide pipe, dual-shaft pneumatic cylinder, etc., and then stack multiple transparent shells of the sign in the preset position in advance. This completes the preparation work for welding and fixing the sign base and the transparent shell of the sign. This reduces the staff's involvement in the welding process of the sign base and the transparent shell of the sign, ensures the accuracy of the guiding and positioning between the transparent shell of the sign and the sign base, reduces the possibility of structural damage to the sign base, and improves the processing speed and quality of the traffic safety sign composed of the transparent shell of the sign and the sign base.

[0017] 2. In this application, the pneumatic cylinder retracts a certain distance, causing the traffic safety sign, which consists of the transparent outer shell and the base of the sign, to be subjected to an upward force. After the traffic safety sign leaves the conveyor belt, its weight acts on a tension detector. The weight data detected by the tension detector is fed back to the human-machine interface device. When the weight value detected by the tension detector reaches a preset value, it indicates that the base of the sign is suspended in the air and has not separated from the transparent outer shell due to gravity. The welding and fixation between the base and the transparent outer shell is relatively stable. This completes the work of testing the welding firmness between the transparent outer shell and the base of the sign, shortens the processing cycle of the traffic safety sign, and reduces cost.

[0018] 3. In this application, when the weight value detected by the tensile tester does not reach the preset value, it means that the sign base has separated from the sign transparent shell under the action of gravity, and the welding process between the sign transparent shell and the sign base has failed. The forward and reverse motors are controlled to rotate in both directions, and the sign transparent shell rotates at a certain angle. Subsequently, the staff can easily and conveniently screen the successfully welded traffic safety signs and the sign transparent shells and sign bases that need to be reworked based on the relative position between the sign transparent shell and the sign base, thereby reducing the labor cost required for the processing of traffic safety signs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the fixing frame of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of the guide frame of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the mounting bracket four of the present invention;

[0023] Figure 5 This is a schematic diagram of the busbar structure of the present invention;

[0024] Figure 6 This is a partial structural schematic diagram of the mounting bracket three of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of gear one of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the orifice frame of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the fixed short rod of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of the fixing frame three of the present invention;

[0029] Figure 11 This is a schematic diagram of the hollow frame structure in this invention;

[0030] Figure 12 This is a partial structural diagram of the hollow frame in this invention.

[0031] Numbered in the diagram: 1. Conveyor belt; 2. Fixed frame one; 3. Telescopic rod one; 4. Fixed frame two; 5. Pneumatic cylinder one; 6. Orifice frame; 7. Forward and reverse motor one; 8. Gearbox; 9. Fixed short rod; 10. Lead screw; 11. Fixed frame three; 12. Fixed frame four; 13. Welding machine; 14. Guide cavity; 15. Fixed frame five; 16. Pneumatic cylinder two; 17. Guide frame; 18. Mounting frame one; 19. Telescopic rod two; 20. Guide ring; 21. Pneumatic cylinder three; 22. Mounting frame two; 23. Mounting frame three; 24. Annular groove; 25. Surface bearing; 26. Fixed frame six; 27. Forward and reverse motor II; 28. Fixed vertical plate; 29. ​​Gear 1; 30. Gear 2; 31. Drive shaft; 32. Groove; 33. Telescopic rod 3; 34. Support rod; 35. Tension detector; 36. Mounting bracket 4; 37. Air pump; 38. Air guide pipe; 39. Solenoid valve; 40. Combustion rack; 41. Air extraction pipe; 42. Vacuum suction cup; 43. Transparent shell of signboard; 44. Signboard base; 45. Pneumatic cylinder 4; 46. Mounting bracket 5; 47. Pneumatic cylinder 5; 48. Telescopic rod 4; 49. Hollow frame; 50. Pressure sensor; 51. Dual-axis pneumatic cylinder; 52. Sliding frame; 53. Push plate. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example: Figures 1-12 As shown, the present invention provides a technical solution for a welding guide robotic arm for mass processing of traffic safety signs, including a conveyor belt 1, a transparent shell 43 for the sign, and a sign base 44. A lower welding arm is installed on the conveyor belt 1, and a pneumatic cylinder 5 is provided between the lower welding arm and the conveyor belt 1. A guide clamping arm is provided at the top of the lower welding arm. The guide clamping arm includes a pneumatic cylinder 16 provided at the top of the conveyor belt 1, a mounting frame 18 fixedly installed at one end of the pneumatic cylinder 16, a pneumatic cylinder 21 fixedly inserted on the mounting frame 18, a mounting frame 22 fixedly installed at the piston end of the pneumatic cylinder 21, a mounting frame 23 rotatably installed at the bottom of the mounting frame 22, and a tension detector 35 and two telescopic rods 33 fixedly installed at the bottom of the mounting frame 23. A mounting frame 36 is fixedly installed at the bottom of the tension detector 35, and a clamping assembly is installed on the mounting frame 36. A rotation control assembly is provided between the mounting frame 22 and the mounting frame 33.

[0034] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, a fixed frame 15 is fixedly sleeved on the outside of the pneumatic cylinder 2 16. The fixed frame 15 and the guide frame 17 fixedly installed on one side of the fixed frame 15 are fixed to the building and cannot be displaced. By controlling the operation of the pneumatic cylinder 2 16, the pneumatic cylinder 2 16 can control the left and right position of the mounting frame 1 18 fixedly installed at the piston end. Two guide rings 20 are provided on both sides inside the guide frame 17. The outer shell of the telescopic rod 2 19 fixedly inserted inside the guide ring 20 is fixedly inserted into the top of the mounting frame 1 18. The piston ends of the four telescopic rods 2 19 are fixedly connected to the mounting frame 2 22. Since the telescopic rods 2 19 can only extend and retract up and down, when the mounting frame 1 18 moves left and right, the mounting frame 2 22 moves left and right synchronously under the action of the four telescopic rods 2 19.

[0035] Specifically, such as Figure 4 , Figure 6 and Figure 7 As shown, in the rotation control assembly, the fixed bracket 26 is fixedly installed at the bottom of the mounting bracket 22. A plane bearing 25 is fixedly installed between the bottom of the fixed bracket 26 and the mounting bracket 23. Therefore, the mounting bracket 23 can rotate while the relative position between the mounting bracket 23 and the mounting bracket 22 in the vertical direction remains unchanged. The top of the mounting bracket 23 is provided with an annular groove 24. The plane bearing 25 and the fixed bracket 26 are both set inside the annular groove 24. The annular groove 24 ensures that the plane bearing 25 and the fixed bracket 26 have sufficient room for movement.

[0036] In the rotation control assembly, the drive shaft 31 is rotatably connected to the mounting bracket 22. Gear 20 is fixedly installed on the outside of the drive shaft 31, and gear 1 29 meshes with it on one side. A forward and reverse motor 27 is fixedly installed between two fixed vertical plates 28 fixedly installed on the top of the mounting bracket 22. The output end of the forward and reverse motor 27 passes through gear 1 29 and is fixedly connected to gear 1 29. Therefore, the forward and reverse motor 27 can be controlled to rotate forward or reverse. Under the action of gear 1 29 and gear 2 30, the drive shaft 31 rotates clockwise or counterclockwise. The bottom end of the drive shaft 31 is fixedly connected to the mounting bracket 33, and the mounting bracket 33 is driven by the drive shaft 31 to rotate accordingly.

[0037] The top of the mounting bracket 323 has a groove 32, and gear 20 and gear 129 are both located inside the groove 32. The groove 32 provides space for the movement of gear 230 and gear 129.

[0038] Specifically, such as Figure 4 , Figure 6 and Figure 7As shown, the piston ends of the two telescopic rods 33 are fixedly connected to the mounting frame 36. Two support rods 34 are fixedly installed at the bottom of the mounting frame 323, so that the relative position between the mounting frame 323 and the mounting frame 36 can be changed. The setting of the support rods 34 restricts the shortest distance between the mounting frame 36 and the mounting frame 323, so as to avoid the tension detector 35 and the telescopic rods 33 being damaged by the impact of the mounting frame 36.

[0039] Specifically, such as Figure 4 and Figure 5 As shown, the vacuum pump 37 in the clamping assembly is fixedly installed on the top of the mounting frame 36. The air inlet end of the vacuum pump 37 is fixedly installed with a solenoid valve 39 at one end. The bottom of the manifold 40, which is fixedly connected to the solenoid valve 39, is fixedly connected with four vacuum pipes 41. The manifold 40 is fixedly installed on the top of the mounting frame 36 and moves synchronously with the mounting frame 36. The bottom end of the vacuum pipe 41 passes through the mounting frame 36 and is fixedly installed with a vacuum suction cup 42. After the vacuum pump 37 is controlled to work, the vacuum pump 37 draws air from the inside of the vacuum suction cup 42 through the air inlet pipe 38, the solenoid valve 39, the manifold 40 and the vacuum pipe 41, so that the air pressure inside the vacuum suction cup 42 is controlled.

[0040] Specifically, such as Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown, the orifice frame 6 in the lower welding arm is set on the top of the conveyor belt 1. The orifice frame 6 is equipped with four welding machines 13 that perform welding functions. Gearboxes 8 and forward and reverse motors 7 are set on the front and right sides of the orifice frame 6. Multiple fixed short rods 9 are fixedly installed between the forward and reverse motors 7 and the gearboxes 8 and the orifice frame 6, so that the forward and reverse motors 7 and the gearboxes 8 move synchronously with the orifice frame 6.

[0041] The output end of the forward and reverse motor 7 on the front side is fixedly connected to the input end of the gearbox 8 on the front side, and the output end of the forward and reverse motor 7 on the right side is fixedly connected to the input end of the gearbox 8 on the right side. Both output ends of the two gearboxes 8 are fixedly equipped with lead screws 10. The two lead screws 10 driven by the front gearbox 8 are horizontal lead screws 10; the two lead screws 10 driven by the right gearbox 8 are vertical lead screws 10. Four guide cavities 14 are opened inside the orifice frame 6. The four lead screws 10 pass through the four guide cavities 14 respectively, and the lead screws 10 are rotatably connected to the orifice frame 6, so that the lead screws 10 can rotate.

[0042] Two transverse lead screws 10 are fitted with fixing brackets 12 on their outer sides via nut pairs. One end of the fixing brackets 12 extends to the outside of the guide cavity 14 and is fixedly connected to the welding machine 13 on the same side. The two fixing brackets 12 are set on a diagonal line inside the orifice frame 6. The movement of the fixing brackets 12 inside the guide cavity 14 cannot be synchronized with the rotation of the lead screws 10. Therefore, when the front forward and reverse motor 7 is working, the two transverse lead screws 10 rotate in opposite directions under the transmission of the gearbox 8, and the two fixing brackets 12 move in opposite directions.

[0043] Both vertical lead screws 10 are fitted with fixing brackets 3 11 on their outer sides via nut pairs. One end of the fixing brackets 3 11 extends to the outside of the guide cavity 14 and is fixedly connected to the welding machine 13 on the same side. The two fixing brackets 3 11 are set on another diagonal line inside the orifice frame 6. The movement of the fixing brackets 3 11 inside the guide cavity 14 cannot be synchronized with the rotation of the lead screws 10. When the right-side forward and reverse motor 7 is working, the two vertical lead screws 10 rotate in opposite directions under the transmission of the gearbox 8, and the two fixing brackets 3 11 move in opposite directions.

[0044] In summary, when the two forward and reverse motors 7 are controlled to rotate synchronously in the forward direction, the four lead screws 10 rotate simultaneously, and the two fixed brackets 12 and 11 are driven to rotate, causing the four welding machines 13 to move clockwise in a U-shaped trajectory. When the two forward and reverse motors 7 are controlled to rotate synchronously in the reverse direction, the four welding machines 13 move counterclockwise in a U-shaped trajectory. The movement of the four welding machines 13 welds the contact position between the transparent shell 43 of the sign and the base 44 of the sign, ensuring the stability of the welding and fixing between the transparent shell 43 of the sign and the base 44 of the sign.

[0045] By controlling the lower welding arm to work, four welding machines 13 can be driven to move along a preset trajectory to weld and fix the transparent shell 43 of the sign and the air extraction pipe 41.

[0046] Specifically, such as Figure 11 and Figure 12As shown, in the guide alignment assembly, pneumatic cylinder 45 is fixedly installed on the front side of the inner cavity of the orifice frame 6. A pneumatic cylinder 47 and a telescopic rod 48 are fixedly installed on one side of the mounting bracket 46, which is fixedly mounted on the piston end of pneumatic cylinder 45. A hollow frame 49 is fixedly installed between the piston ends of pneumatic cylinder 47 and telescopic rod 48. By controlling the operation of pneumatic cylinder 47, the front and rear positions of the hollow frame 49 can be controlled, allowing the hollow frame 49 to block different sized sign bases 44 and stop them at a preset position. A mounting bracket 48 is fixedly installed on the top of the hollow frame 49. The hollow frame 49 is equipped with a pressure sensor 50. The two piston ends of the dual-axis pneumatic cylinder 51 are fixedly mounted with sliding frames 52. The sliding frames 52 are slidably connected to the hollow frame 49. The pusher plate 53 is fixedly mounted on one side of the sliding frame 52 and is located on the outside of the hollow frame 49. By controlling the operation of the dual-axis pneumatic cylinder 51, the distance between the two pusher plates 53 can be controlled, so that the two pusher plates 53 can correct the position of the sign base 44 blocked by the hollow frame 49 and guide the position of the sign base 44.

[0047] Specifically, such as Figure 1 and Figure 2 As shown, two fixed frames 4 are fixedly installed on both sides of the mouth-shaped frame 6. Two fixed frames 2 at the bottom of the two fixed frames 4 are fixedly connected to the outer shell of the conveyor belt 1. Two telescopic rods 3 are fixedly inserted on one of the fixed frames 2. The piston ends of the two telescopic rods 3 are fixedly connected to the fixed frame 4 on the same side. A pneumatic cylinder 5 is fixedly inserted on the other fixed frame 2. The piston end of the pneumatic cylinder 5 is fixedly connected to the fixed frame 4 on the same side. Therefore, by controlling the operation of the pneumatic cylinder 5, the up and down position of the mouth-shaped frame 6 can be controlled.

[0048] Specifically, the human-machine interface equipment is used to control the automated operation of the conveyor belt 1, the lower welding arm, the guide clamping arm, and other structures. This is a publicly available technology and will not be described in detail here.

[0049] The working principle of the robotic arm, which consists of a lower welding arm and a guide clamping arm, in this application is as follows:

[0050] The conveyor belt 1 transports the sign base 44. When the sign base 44 comes into contact with the hollow frame 49, the pressure sensor 50 comes into contact with the sign base 44. The pressure sensor 50 detects a change in pressure value, and the human-machine interface receives feedback from the pressure sensor 50 to control the conveyor belt 1 to stop working, so that the conveyor belt 1 stops at the bottom of the orifice frame 6.

[0051] Subsequently, the human-machine interface device controls the dual-axis pneumatic cylinder 51 to retract, and the two pusher plates 53 move in opposite directions at the same speed. The two pusher plates 53 adjust the position of the sign base 44, so that the sign base 44 enters the welding state. Then, the dual-axis pneumatic cylinder 51 stops working and drives the pusher plates 53 to reset.

[0052] Subsequently, the second pneumatic cylinder 16 is activated to drive the first mounting bracket 18 to move, causing the first mounting bracket 18 and the fourth mounting bracket 36 to stop on top of the multiple transparent sign shells 43 that have been arranged in advance. Then, the third pneumatic cylinder 21 is activated to drive the second mounting bracket 22, the third mounting bracket 23, and the fourth mounting bracket 36 to move down, causing the four vacuum suction cups 42 to press onto the uppermost transparent sign shell 43. The third pneumatic cylinder 21 stops working, and the vacuum pump 37 is activated to extract air, creating a negative pressure inside the four vacuum suction cups 42 to adsorb and fix the transparent sign shell 43. After a period of time, the solenoid valve 39 is activated to close, the vacuum pump 37 stops working, and finally the third pneumatic cylinder 21 is activated to retract, and the transparent sign shell 43 is pulled upward.

[0053] Subsequently, the control cylinder 2 16 works again, causing the mounting bracket 4 36 to move to the preset position on the top of the mouth-shaped bracket 6, the transparent shell 43 of the sign moves to the top of the mouth-shaped bracket 6, and the control cylinder 2 16 stops working.

[0054] Subsequently, the control cylinder 21 pushes the transparent outer shell 43 of the signboard downwards, pressing it against the top of the signboard base 44. Then, the lower welding arm is controlled to operate, driving four welding machines 13 to move along a preset trajectory. The welding machines 13 work synchronously to weld the contact points between the transparent outer shell 43 and the signboard base 44, thus completing the welding work between the transparent outer shell 43 and the signboard base 44. The operator prepares in advance according to the following parameters: conveyor belt 1, cylinder 2 16, cylinder 3 21, air pump 37, air guide pipe 38, and dual-shaft air pressure... The operation of structures such as cylinder 51 requires editing the control program. Then, multiple transparent shells 43 of the sign are stacked in advance at preset positions to complete the preparation work for welding and fixing the sign base 44 and the transparent shell 43. This reduces the involvement of workers in the welding process of the sign base 44 and the transparent shell 43, ensures the accuracy of the guiding and positioning between the transparent shell 43 and the sign base 44, reduces the possibility of structural damage on the sign base 44, and improves the speed and quality of processing the traffic safety sign composed of the transparent shell 43 and the sign base 44.

[0055] After the transparent outer shell 43 of the sign is welded to the base 44 of the sign, the control cylinder 21 retracts a certain distance. The cylinder 21 drives the mounting brackets 22, 33, and 46 to move upward a certain distance. At this time, the traffic safety sign composed of the transparent outer shell 43 and the base 44 is subjected to an upward force. A tension detector 35 is fixedly installed between the mounting brackets 23 and 36. When the traffic safety sign is removed from the conveyor belt 1, the weight of the traffic safety sign acts on the tension detector 35. The weight data detected by the tension detector 35 is fed back to the human-machine interface device. When the weight value detected by the tension detector 35 reaches the preset value, it indicates that the base 44 of the sign is suspended and has not separated from the transparent outer shell 43 due to gravity. The welding and fixing between the base 44 of the sign and the transparent outer shell 43 of the sign is relatively stable. This completes the work of testing the welding firmness between the transparent outer shell 43 of the sign and the base 44 of the sign, shortens the processing cycle of the traffic safety sign, and reduces cost investment.

[0056] Then, control the solenoid valve 39 to open, causing the vacuum suction cup 42 to release pressure, the transparent outer shell 43 of the sign to lose its fixation, and the traffic safety sign falls back to the top of the conveyor belt 1 under the action of gravity; control the pneumatic cylinder 21 to retract and reset, control the pneumatic cylinder 5 to work, causing the mouth-shaped frame 6 to move upward, providing space for the traffic safety sign to move, and control the conveyor belt 1 to work to transport the traffic safety sign away.

[0057] When the weight detected by the tension detector 35 does not reach the preset value, it indicates that after the transparent outer shell 43 of the sign moves upward, the sign base 44 separates from the transparent outer shell 43 under the action of gravity, and the welding between the transparent outer shell 43 and the sign base 44 fails. The human-machine interface controls the forward and reverse motor 27 to rotate forward, driving the mounting bracket 33 to rotate by a certain angle. The mounting bracket 46 rotates by a certain angle, and the mounting bracket 46 drives the transparent outer shell 43 to rotate by a certain angle through the clamping component. Then, the solenoid valve 39 is opened, the vacuum suction cup 42 is depressurized, and the transparent outer shell 43 of the sign, after the angle change, falls to the bottom of the sign. The top of seat 44 is then controlled; subsequently, the pneumatic cylinder 3 21 is controlled to retract, and the mounting frame 4 36 moves upward and resets. During this process, the forward and reverse motor 2 27 is controlled to reverse, so that the relative position between the mounting frame 2 22 and the mounting frame 3 23 is restored. Then, the pneumatic cylinder 1 5 is controlled to push the orifice frame 6 upward, and the conveyor belt 1 works to transport the sign. The transparent shell 43 and the sign base 44 move. Subsequently, the staff can easily and conveniently screen the successfully welded traffic safety signs and the sign transparent shell 43 and sign base 44 that need to be reworked according to the relative position between the sign transparent shell 43 and the sign base 44, reducing the labor cost required for traffic safety sign processing.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welding guide robotic arm for mass production of traffic safety signs, comprising a conveyor belt (1), a transparent shell (43) for the signs, and a base (44) for the signs, characterized in that: A lower welding arm is installed on the conveyor belt (1). A pneumatic cylinder (5) is provided between the lower welding arm and the conveyor belt (1). A guide clamping arm is provided at the top of the lower welding arm. The guide clamping arm includes a pneumatic cylinder (16) provided at the top of the conveyor belt (1), a mounting frame (18) fixedly installed at one end of the pneumatic cylinder (16), a pneumatic cylinder (21) fixedly inserted on the mounting frame (18), a mounting frame (22) fixedly installed at the piston end of the pneumatic cylinder (21), a mounting frame (23) rotatably installed at the bottom of the mounting frame (22), and a tension detector (35) and two telescopic rods (33) fixedly installed at the bottom of the mounting frame (23). A mounting frame (36) is fixedly installed at the bottom of the tension detector (35). A clamping assembly is installed on the mounting frame (36). A rotation control assembly is provided between the mounting frame (22) and the mounting frame (23). The clamping assembly includes a vacuum pump (37) fixedly installed on the top of the mounting frame four (36), an air guide pipe (38) fixedly installed at the air inlet end of the vacuum pump (37), a solenoid valve (39) fixedly installed at one end of the air guide pipe (38), a manifold (40) fixedly connected to the solenoid valve (39), and four vacuum pipes (41) fixedly connected to the manifold (40). The manifold (40) is fixedly installed on the top of the mounting frame four (36), and the bottom end of the vacuum pipe (41) passes through the mounting frame four (36) and is fixedly installed with a vacuum suction cup (42). The lower welding arm includes a mouth-shaped frame (6) set on the top of the conveyor belt (1), four welding machines (13) set inside the mouth-shaped frame (6), and a guide calibration assembly set on the front side of the inner cavity of the mouth-shaped frame (6). A gearbox (8) and a forward and reverse motor (7) are set on the front and right sides of the mouth-shaped frame (6). The output end of the forward and reverse motor (7) is fixedly connected to the input end of the gearbox (8) on the same side. Multiple fixed short rods (9) are fixedly installed between the forward and reverse motor (7) and the gearbox (8) and the mouth-shaped frame (6). A lead screw (10) is fixedly installed on both output ends of the gearbox (8).

2. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: The outer side of the pneumatic cylinder 2 (16) is fixedly fitted with a fixing frame 5 (15). A guide frame (17) is fixedly installed on one side of the fixing frame 5 (15). Two guide rings (20) are provided on both sides inside the guide frame (17). A telescopic rod 2 (19) is fixedly inserted inside the guide ring (20). The outer shell of the telescopic rod 2 (19) is fixedly inserted on the mounting frame 1 (18). The piston end of the telescopic rod 2 (19) is fixedly connected to the mounting frame 2 (22).

3. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: The rotation control assembly includes a drive shaft (31) rotatably connected to the bottom of the mounting frame two (22), a gear two (30) fixedly mounted on the outside of the drive shaft (31), a gear one (29) meshing on one side of the gear two (30), and a fixed frame six (26) set on the outside of the gear two (30). The fixed frame six (26) is fixedly mounted on the bottom of the mounting frame two (22). A plane bearing (25) is fixedly mounted between the bottom of the fixed frame six (26) and the mounting frame three (23). An annular groove (24) is opened on the top of the mounting frame three (23). The plane bearing (25) and the fixed frame six (26) are both set inside the annular groove (24).

4. The welding guide robotic arm for mass production of traffic safety signs according to claim 3, characterized in that: The top of the mounting bracket 2 (22) is fixedly mounted with two fixed vertical plates (28), and the two fixed vertical plates (28) are fixedly mounted with a forward and reverse motor 2 (27). The output end of the forward and reverse motor 2 (27) passes through the gear 1 (29) and is fixedly connected to the gear 1 (29). The bottom end of the transmission shaft (31) is fixedly connected to the mounting bracket 3 (23). The top of the mounting bracket 3 (23) is provided with a groove (32), and the gear 2 (30) and the gear 1 (29) are both set inside the groove (32).

5. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: Both of the piston ends of the telescopic rods three (33) are fixedly connected to the mounting bracket four (36), and two support rods (34) are fixedly installed at the bottom of the mounting bracket three (23).

6. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: The orifice frame (6) has four guide cavities (14) inside, and the four lead screws (10) pass through the four guide cavities (14) respectively. The lead screws (10) are rotatably connected to the orifice frame (6). The two lead screws (10) installed on the front gearbox (8) are fitted with a fixing bracket four (12) on the outside through a nut pair. One end of the fixing bracket four (12) extends to the outside of the guide cavity (14) and is fixedly connected to the welding machine (13) on the same side. The two lead screws (10) installed on the right gearbox (8) are fitted with a fixing bracket three (11) on the outside through a nut pair. One end of the fixing bracket three (11) extends to the outside of the guide cavity (14) and is fixedly connected to the welding machine (13) on the same side.

7. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: The guide calibration assembly includes a pneumatic cylinder four (45) fixedly installed on the front side of the inner cavity of the orifice frame (6), a mounting frame five (46) fixedly installed on the piston end of the pneumatic cylinder four (45), and a pneumatic cylinder five (47) and a telescopic rod four (48) fixedly installed on one side of the mounting frame five (46). A hollow frame (49) is fixedly installed between the piston ends of the pneumatic cylinder five (47) and the telescopic rod four (48). A pressure sensor (50) is fixedly installed on the top of the hollow frame (49). A dual-axis pneumatic cylinder (51) is fixedly installed inside the hollow frame (49). A sliding frame (52) is fixedly installed on both piston ends of the dual-axis pneumatic cylinder (51). The sliding frame (52) is slidably connected to the hollow frame (49). A pusher plate (53) is fixedly installed on one side of the sliding frame (52).

8. The welding guide robotic arm for mass production of traffic safety signs according to claim 1, characterized in that: The mouth-shaped frame (6) is fixedly installed with two fixing frames (4) on both sides. The bottom of each of the two fixing frames (4) is provided with a fixing frame (2). The fixing frame (2) is fixedly connected to the outer shell of the conveyor belt (1). Two telescopic rods (3) are fixedly inserted on one of the fixing frames (2). The piston ends of the two telescopic rods (3) are fixedly connected to the fixing frame (4) on the same side. The pneumatic cylinder (5) is fixedly inserted on the other fixing frame (2). The piston end of the pneumatic cylinder (5) is fixedly connected to the fixing frame (4) on the same side.

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