Welding guide mechanical arm for batch processing of traffic safety signboards

Abstract

The invention discloses a welding guide mechanical arm for batch processing of traffic safety signboards, and relates to the technical field of manipulators, the welding guide mechanical arm comprises a conveying belt, a signboard transparent shell and a signboard base, a lower welding arm is mounted on the conveying belt, and a first pneumatic cylinder is arranged between the lower welding arm and the conveying belt; a guide clamping arm is arranged at the top of the lower welding arm; the guide clamping arm comprises a second pneumatic cylinder arranged at the top of the conveying belt, a first mounting frame fixedly mounted at one end of the second pneumatic cylinder, a third pneumatic cylinder fixedly arranged on the first mounting frame in a penetrating mode, and a second mounting frame fixedly mounted at the piston end of the third pneumatic cylinder. A third mounting frame is rotationally arranged at the bottom of the second mounting frame, a tension detector and two third telescopic rods are fixedly mounted at the bottom of the third mounting frame, the participation degree of workers in the welding process of the signboard base and the signboard transparent shell is reduced, and the accuracy of guiding and positioning between the signboard transparent shell and the signboard base is guaranteed; and the possibility of structural damage on the signboard base is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of manipulators, and specifically to a welding guiding robotic arm for batch processing of traffic safety signs. Background Art

[0002] Traffic safety signs, that is, 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 play the role of road language; command and control traffic to ensure traffic safety; guide the way and improve driving efficiency.

[0003] Traffic safety signs are graphic symbols that display traffic regulations and road information. They can vividly, specifically, and concisely express traffic regulations. With the development of technology, setting LED light strips to provide indication information can meet the needs of night indication and improve the adaptability and controllability of traffic safety signs. However, after the LED light strips are set on the sign base, during the process of aligning and welding the transparent shell with the sign base by workers, it is easy to occur that the structures such as the LED light strips are displaced and damaged due to improper operation by workers, which affects the speed of welding processing and is likely to cause economic losses. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding guiding robotic arm for batch processing of traffic safety signs to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A welding guiding robotic arm for batch processing of traffic safety signs, including a conveyor belt, a transparent sign shell, and a sign base. A lower welding arm is installed on the conveyor belt. A first pneumatic cylinder is arranged between the lower welding arm and the conveyor belt. A guiding clamping arm is arranged at the top of the lower welding arm. The guiding clamping arm includes a second pneumatic cylinder arranged at the top of the conveyor belt, a first mounting frame fixedly installed at one end of the second pneumatic cylinder, a third pneumatic cylinder fixedly penetrating through the first mounting frame, a second mounting frame fixedly installed at the piston end of the third pneumatic cylinder, a third mounting frame rotatably arranged at the bottom of the second mounting frame, a tension detector and two third telescopic rods fixedly installed at the bottom of the third mounting frame. A fourth mounting frame is fixedly installed at the bottom end of the tension detector. A clamping assembly is installed on the fourth mounting frame. A rotation control assembly is arranged between the second mounting frame and the third mounting frame.

[0006] Preferably, a fifth fixing frame is fixedly sleeved outside the second pneumatic cylinder. A guiding frame is fixedly installed on one side of the fifth fixing frame. Two guiding rings are arranged on both sides inside the guiding frame. A second telescopic rod is fixedly penetrated inside the guiding ring. The outer shell of the second telescopic rod is fixedly penetrated through the first mounting frame. The piston end of the second telescopic rod is fixedly connected to the second mounting frame.

[0007] Preferably, the rotation control assembly includes a transmission shaft rotatably connected to the bottom of the second mounting frame, a second gear fixedly installed on the outer side of the transmission shaft, a first gear meshed with one side of the second gear, and a sixth fixing frame arranged on the outer side of the second gear. The sixth fixing frame is fixedly installed on the bottom of the second mounting frame. A plain bearing is fixedly installed between the bottom of the sixth fixing frame and the third mounting frame. An annular groove is formed at the top of the third mounting frame. The plain bearing and the sixth fixing frame are both arranged inside the annular groove.

[0008] Preferably, two fixing vertical plates are fixedly installed at the top of the second mounting frame. A forward and reverse motor two is fixedly installed between the two fixing vertical plates. The output end of the forward and reverse motor two penetrates through the first gear and is fixedly connected to the first gear. The bottom end of the transmission shaft is fixedly connected to the third mounting frame. A groove is formed at the top of the third mounting frame. The second gear and the first gear are both arranged inside the groove.

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

[0010] Preferably, the clamping assembly includes an air extraction pump fixedly installed at the top of the fourth mounting frame, an air guide pipe fixedly installed at the air inlet end of the air extraction pump, a solenoid valve fixedly installed at one end of the air guide pipe, a confluence frame fixedly communicated with the solenoid valve, and four air extraction pipes fixedly communicated with the confluence frame. The confluence frame is fixedly installed at the top of the fourth mounting frame. The bottom end of the air extraction pipe penetrates through the fourth mounting frame and is fixedly installed with a vacuum chuck.

[0011] Preferably, the lower welding arm includes a mouth-shaped frame arranged on the top of the conveyor belt, four welding machines arranged inside the mouth-shaped frame, and a guiding and aligning assembly arranged on the front side of the inner cavity of the mouth-shaped frame. Gear boxes and forward and reverse motor ones are arranged on the front side and the right side of the mouth-shaped frame. The output end of the forward and reverse motor one is fixedly connected to the input end of the gear box on the same side. A plurality of fixing short rods are fixedly installed between the forward and reverse motor one and the gear box and the mouth-shaped frame. Screw rods are fixedly installed at both output ends of the gear box.

[0012] Preferably, four guiding cavities are formed inside the mouth-shaped frame. The four screw rods respectively penetrate through the four guiding cavities. The screw rods are rotatably connected to the mouth-shaped frame. Fixing frames four are sleeved on the outer sides of the two screw rods installed by the front side gear box through nut pairs. One end of the fixing frame four extends to the outside of the guiding cavity and is fixedly connected to the welding machine on the same side. Fixing frames three are sleeved on the outer sides of the two screw rods installed by the right side gear box through nut pairs. One end of the fixing frame three extends to the outside of the guiding cavity and is fixedly connected to the welding machine on the same side.

[0013] Preferably, the guide proofreading assembly comprises a pneumatic cylinder four fixedly mounted on the front side of the inner cavity of the mouth-shaped frame, a mounting frame five fixedly mounted on the piston end of the pneumatic cylinder four, and a pneumatic cylinder five and a telescopic rod four fixedly mounted on one side of the mounting frame five, a hollow frame fixedly mounted between the pneumatic cylinder five and the piston ends of the telescopic rod four, a pressure sensor fixedly mounted on the top of the hollow frame, a double-axis pneumatic cylinder fixedly mounted inside the hollow frame, sliding frames fixedly mounted on both piston ends of the double-axis pneumatic cylinder, the sliding frame is slidably connected to the hollow frame, and a push plate fixedly mounted on one side of the sliding frame.

[0014] Preferably, a fixing frame 2 is fixedly installed on both sides of the mouth-shaped frame, a fixing frame 1 is arranged at the bottom of the two fixing frames 2, the fixing frame 1 is fixedly connected to the conveyor belt shell, two telescopic rods 1 are fixedly inserted on one of the fixing frames 1, and 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, and 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 present invention has the following beneficial effects: 1. In this application, the staff edits the control program in advance according to the working needs of the conveyor belt, pneumatic cylinder 2, pneumatic cylinder 3, vacuum pump, air guide tube, dual-axis pneumatic cylinder and other structures, and then stacks multiple transparent shells of the signboard at the preset position in advance, so as to complete the preparation work of welding and fixing the signboard base and the transparent shell of the signboard, reduce the participation of the staff in the welding process of the signboard base and the transparent shell of the signboard, ensure the accuracy of the guiding positioning between the transparent shell of the signboard and the signboard base, reduce the possibility of structural damage on the signboard base, and improve the processing speed and quality of the traffic safety signs composed of the transparent shell of the signboard and the signboard base.

[0016] 2. In the present application, the pneumatic cylinder is controlled to retract a certain distance, and the traffic safety sign composed of the transparent shell of the sign and the base of the sign is subjected to an upward force. When the traffic safety sign is separated from the conveyor belt, the weight of the traffic safety sign acts on the tension detector, and the weight data detected by the tension detector is fed back to the human-machine interaction device. When the weight value detected by the tension detector reaches above the preset value, it indicates that the base of the sign is suspended in the air, and the base of the sign is not separated from the transparent shell of the sign due to the influence of gravity. The welding and fixation between the base of the sign and the transparent shell of the sign are relatively stable, and the work of welding firmness detection of the transparent shell of the sign and the base of the sign is completed, thereby shortening the processing cycle of the traffic safety sign and reducing cost investment.

[0017] 3. In this application, when the weight value detected by the tensile detector does not reach the preset value, it means that the signboard base separates from the signboard transparent shell under the action of gravity, and the welding process between the signboard transparent shell and the signboard base fails. Then, control the forward and reverse motor two to rotate forward, and the signboard transparent shell rotates a certain angle. Subsequently, according to the relative position between the signboard transparent shell and the signboard base, the staff can simply and conveniently screen the traffic safety signboards with successful welding from the signboard transparent shells and signboard bases that need to resume work, reducing the labor cost input required for the processing of traffic safety signboards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of the first fixing frame of the present invention; Figure 3 is a partial structural schematic diagram of the guiding frame of the present invention; Figure 4 is a structural schematic diagram of the fourth mounting frame of the present invention; Figure 5 is a structural schematic diagram of the busbar frame of the present invention; Figure 6 is a partial structural schematic diagram of the third mounting frame of the present invention; Figure 7 is a structural schematic diagram of the first gear of the present invention; Figure 8 is a structural schematic diagram of the mouth-shaped frame of the present invention; Figure 9 is a structural schematic diagram of the fixed short rod of the present invention; Figure 10 is a structural schematic diagram of the third fixing frame of the present invention; Figure 11 is a structural schematic diagram of the hollow frame of the present invention; Figure 12 is a partial structural schematic diagram of the hollow frame of the present invention.

[0019] Reference numerals in the figure: 1, conveyor belt; 2, first fixed frame; 3, first telescopic rod; 4, second fixed frame; 5, first pneumatic cylinder; 6, mouth-shaped frame; 7, first reversible motor; 8, gearbox; 9, fixed short rod; 10, lead screw; 11, third fixed frame; 12, fourth fixed frame; 13, welding machine; 14, guide cavity; 15, fifth fixed frame; 16, second pneumatic cylinder; 17, guide frame; 18, first mounting frame; 19, second telescopic rod; 20, guide ring; 21, third pneumatic cylinder; 22, second mounting frame; 23, third mounting frame; 24, annular groove; 25, plain bearing; 26, sixth fixed frame; 27, second reversible motor; 28, fixed vertical plate; 29, first gear; 30, second gear; 31, transmission shaft; 32, groove; 33, third telescopic rod; 34, support rod; 35, tension detector; 36, fourth mounting frame; 37, air extraction pump; 38, air duct; 39, solenoid valve; 40, confluence frame; 41, air extraction pipe; 42, vacuum chuck; 43, transparent sign housing; 44, sign base; 45, fourth pneumatic cylinder; 46, fifth mounting frame; 47, fifth pneumatic cylinder; 48, fourth telescopic rod; 49, hollow frame; 50, pressure sensor; 51, double-acting pneumatic cylinder; 52, sliding frame; 53, pusher plate. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment: As Figures 1 - 12 shown, the present invention provides a technical solution for a welding guiding robotic arm for batch processing of traffic safety signs, including a conveyor belt 1, a transparent sign housing 43 and a sign base 44. A lower welding arm is installed on the conveyor belt 1. A first pneumatic cylinder 5 is provided between the lower welding arm and the conveyor belt 1. A guiding and clamping arm is provided at the top of the lower welding arm. The guiding and clamping arm includes a second pneumatic cylinder 16 provided at the top of the conveyor belt 1, a first mounting frame 18 fixedly installed at one end of the second pneumatic cylinder 16, a third pneumatic cylinder 21 fixedly penetrating through the first mounting frame 18, a second mounting frame 22 fixedly installed at the piston end of the third pneumatic cylinder 21, a third mounting frame 23 rotatably provided at the bottom of the second mounting frame 22, and a tension detector 35 and two third telescopic rods 33 fixedly installed at the bottom of the third mounting frame 23. A fourth mounting frame 36 is fixedly installed at the bottom end of the tension detector 35. A clamping assembly is installed on the fourth mounting frame 36. A rotation control assembly is provided between the second mounting frame 22 and the third mounting frame 23.

[0022] Specifically, as Figure 1 , Figure 2 and Figure 3As shown, a fifth fixing frame 15 is fixedly sleeved outside the second pneumatic cylinder 16. The fifth fixing frame 15 and the guiding frame 17 fixedly installed on one side of the fifth fixing frame 15 are both fixed to the building and cannot be displaced. By controlling the operation of the second pneumatic cylinder 16, the second pneumatic cylinder 16 can control the left and right positions of the first mounting frame 18 fixedly installed at the piston end. On both sides inside the guiding frame 17, two guiding rings 20 are provided. The outer shell of the second telescopic rod 19 fixedly penetrating inside the guiding ring 20 is fixedly penetrated through the top of the first mounting frame 18. The piston ends of the four second telescopic rods 19 are fixedly connected to the second mounting frame 22. Since the second telescopic rod 19 can only expand and contract vertically, when the first mounting frame 18 moves left and right, under the action of the four second telescopic rods 19, the second mounting frame 22 moves left and right synchronously.

[0023] Specifically, as Figure 4 , Figure 6 and Figure 7 shown, in the rotation control assembly, the sixth fixing frame 26 is fixedly installed at the bottom of the second mounting frame 22. A plain bearing 25 is fixedly installed between the bottom of the sixth fixing frame 26 and the third mounting frame 23. Therefore, when the relative position between the third mounting frame 23 and the second mounting frame 22 remains unchanged in the up and down direction, the third mounting frame 23 can rotate. An annular groove 24 is provided at the top of the third mounting frame 23. The plain bearing 25 and the sixth fixing frame 26 are both arranged inside the annular groove 24. The annular groove 24 ensures that the plain bearing 25 and the sixth fixing frame 26 have sufficient movement space.

[0024] In the rotation control assembly, the transmission shaft 31 is rotatably connected to the second mounting frame 22. One side of the second gear 30 fixedly installed on the outer side of the transmission shaft 31 meshes with the first gear 29. A reversible motor two 27 is fixedly installed between the two fixed vertical plates 28 fixedly installed at the top of the second mounting frame 22. The output end of the reversible motor two 27 penetrates through the first gear 29 and is fixedly connected to the first gear 29. Therefore, by controlling the reversible motor two 27 to rotate forward or reverse, under the action of the first gear 29 and the second gear 30, the transmission shaft 31 rotates clockwise or counterclockwise. And the bottom end of the transmission shaft 31 is fixedly connected to the third mounting frame 23. The third mounting frame 23 is driven by the transmission shaft 31 to perform corresponding rotation; A groove 32 is provided at the top of the third mounting frame 23. The second gear 30 and the first gear 29 are both arranged inside the groove 32. The provision of the groove 32 provides space for the movement of the second gear 30 and the first gear 29.

[0025] Specifically, as Figure 4 , Figure 6 and Figure 7As shown in the figure, both 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 23, enabling the relative position between the mounting frame 23 and the mounting frame 36 to change. The setting of the support rods 34 limits the shortest distance between the mounting frame 36 and the mounting frame 23, preventing the tension detector 35 and the telescopic rod 33 from being damaged by the impact of the mounting frame 36.

[0026] Specifically, as Figure 4 and Figure 5 shown in the figure, the air pump 37 in the clamping assembly is fixedly installed at the top of the mounting frame 36. One end of the air duct 38 fixedly installed at the intake end of the air pump 37 is fixedly installed with a solenoid valve 39. Four air extraction pipes 41 are fixedly connected to the bottom of the manifold 40 fixedly connected to the solenoid valve 39. The manifold 40 is fixedly installed at the top of the mounting frame 36 and moves synchronously with the mounting frame 36. The bottom ends of the air extraction pipes 41 penetrate through the mounting frame 36 and are fixedly installed with vacuum suction cups 42. After controlling the air pump 37 to work, the air pump 37 extracts air from the inside of the vacuum suction cups 42 through the air duct 38, the solenoid valve 39, the manifold 40, and the air extraction pipes 41, so as to control the air pressure inside the vacuum suction cups 42.

[0027] Specifically, as Figure 1 、 Figure 8 、 Figure 9 and Figure 10 shown in the figure, the U-shaped frame 6 in the lower welding arm is arranged on the top of the conveyor belt 1. Four welding machines 13 for welding are arranged inside the U-shaped frame 6. A gearbox 8 and a forward and reverse motor 7 are arranged on the front side and the right side of the U-shaped frame 6 respectively. A plurality of fixed short rods 9 are fixedly installed between the forward and reverse motor 7 and the gearbox 8 and the U-shaped frame 6, enabling the forward and reverse motor 7 and the gearbox 8 to move synchronously with the U-shaped frame 6.

[0028] 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. Two lead screws 10 are fixedly installed at the two output ends of the two gearboxes 8. The two lead screws 10 driven by the front gearbox 8 are horizontal lead screws 10; the two lead screws 10 driven by the gearbox 8 on the right side are vertical lead screws 10. Four guide cavities 14 are opened inside the U-shaped frame 6. The four lead screws 10 respectively penetrate through the four guide cavities 14, and the lead screws 10 are rotatably connected to the U-shaped frame 6, enabling the lead screws 10 to rotate; On the outer sides of the two horizontal lead screws 10, fixing brackets four 12 are sleeved through nut pairs. One end of the fixing brackets four 12 extends outside the guiding cavity 14 and is fixedly connected to the welding machine 13 on the same side. The two fixing brackets four 12 are arranged on a diagonal line inside the U-shaped frame 6. The fixing brackets four 12 cannot rotate synchronously with the lead screws 10 during the movement inside the guiding cavity 14. Therefore, when the front and reverse motor one 7 works, driven by the gearbox 8, the two horizontal lead screws 10 rotate in opposite directions, and the two fixing brackets four 12 move in opposite directions. On the outer sides of the two vertical lead screws 10, fixing brackets three 11 are sleeved through nut pairs. One end of the fixing brackets three 11 extends outside the guiding cavity 14 and is fixedly connected to the welding machine 13 on the same side. The two fixing brackets three 11 are arranged on the other diagonal line inside the U-shaped frame 6. The fixing brackets three 11 cannot rotate synchronously with the lead screws 10 during the movement inside the guiding cavity 14. When the right front and reverse motor one 7 works, driven by the gearbox 8, the two vertical lead screws 10 rotate in opposite directions, and the two fixing brackets three 11 move in opposite directions.

[0029] In summary, when controlling the two front and reverse motors one 7 to rotate forward synchronously, the four lead screws 10 rotate simultaneously, and the two fixing brackets four 12 and the two fixing brackets three 11 are driven to rotate, causing the four welding machines 13 to move clockwise in a U-shaped trajectory; when controlling the two front and reverse motors one 7 to rotate reversely synchronously, the four welding machines 13 move counterclockwise in a U-shaped trajectory, and the four welding machines 13 weld the contact positions between the transparent outer shell 43 of the signboard and the signboard base 44, ensuring the stability of the welding and fixing between the transparent outer shell 43 of the signboard and the signboard base 44.

[0030] Controlling the lower welding arm to work can drive the four welding machines 13 to move according to the preset trajectory to weld and fix the transparent outer shell 43 of the signboard and the air extraction pipe 41.

[0031] Specifically, such as Figure 11 and Figure 12As shown in the figure, the fourth pneumatic cylinder 45 in the guiding and aligning component is fixedly installed on the front side of the inner cavity of the U-shaped frame 6. The fifth pneumatic cylinder 47 and the fourth telescopic rod 48 are fixedly installed on one side of the mounting frame 46 fixedly installed at the piston end of the fourth pneumatic cylinder 45. A hollow frame 49 is fixedly installed between the piston ends of the fifth pneumatic cylinder 47 and the fourth telescopic rod 48. By controlling the operation of the fifth pneumatic cylinder 47, the front and back positions of the hollow frame 49 can be controlled, so that the hollow frame 49 blocks the signboard bases 44 of different sizes and stays at the preset working positions. A pressure sensor 50 is fixedly installed on the top of the hollow frame 49. Sliding frames 52 are fixedly installed at both piston ends of the double-axis pneumatic cylinder 51 fixedly installed inside the hollow frame 49. The sliding frames 52 are slidably connected to the hollow frame 49, and the pushing plates 53 fixedly installed on one side of the sliding frames 52 are arranged outside the hollow frame 49. By controlling the operation of the double-axis pneumatic cylinder 51, the distance between the two pushing plates 53 can be controlled, so that the two pushing plates 53 correct the position of the signboard base 44 blocked by the hollow frame 49 and guide the position of the signboard base 44.

[0032] Specifically, as Figure 1 and Figure 2 shown in the figure, fixing frames two 4 are fixedly installed on both sides of the U-shaped frame 6. The two fixing frames one 2 arranged at the bottoms of the two fixing frames two 4 are fixedly connected to the outer shell of the conveyor belt 1. Two first telescopic rods 3 are fixedly inserted on one of the fixing frames one 2. The piston ends of the two first telescopic rods 3 are fixedly connected to the fixing frame two 4 on the same side. The first pneumatic cylinder 5 is fixedly inserted on the other fixing frame one 2. The piston end of the first pneumatic cylinder 5 is fixedly connected to the fixing frame two 4 on the same side. Therefore, by controlling the operation of the first pneumatic cylinder 5, the up and down position of the U-shaped frame 6 can be controlled.

[0033] Specifically, for the structures such as the conveyor belt 1, the lower welding arm, and the guiding and clamping arm, they are connected to the human-computer interaction device to control their automated operation, which is a publicly known technology and will not be elaborated here.

[0034] The specific working principle of the robotic arm composed of the lower welding arm and the guiding and clamping arm in this application is as follows: The conveyor belt 1 conveys the signboard base 44 for movement. When the signboard base 44 abuts against the hollow frame 49, the pressure sensor 50 contacts the signboard base 44. The pressure value detected by the pressure sensor 50 changes. The human-computer interaction device receives the feedback of the pressure sensor 50 and controls the conveyor belt 1 to pause, so that the conveyor belt 1 stays at the bottom of the U-shaped frame 6.

[0035] Subsequently, the human-computer interaction device controls the double-axis pneumatic cylinder 51 to work and contract. The two pushing plates 53 move towards each other at the same speed. The two pushing plates 53 adjust the position of the signboard base 44. After the signboard base 44 enters the welding state, the double-axis pneumatic cylinder 51 stops working and drives the pushing plates 53 to reset.

[0036] Subsequently, control the pneumatic cylinder two 16 to work to push the mounting bracket one 18 to move, so that the mounting bracket one 18 and the mounting bracket four 36 stay on the tops of a plurality of sign transparent casings 43 arranged in advance in a stacked manner. Subsequently, the pneumatic cylinder three 21 works to push the mounting bracket two 22, the mounting bracket three 23 and the mounting bracket four 36 to move downward, so that the four vacuum suction cups 42 press on the uppermost sign transparent casing 43. The pneumatic cylinder three 21 pauses working. Then control the air extraction pump 37 to work to extract air, so that a negative pressure is generated inside the four vacuum suction cups 42 to adsorb and fix the sign transparent casing 43. After a period of time, control the solenoid valve 39 to work to close, and the air extraction pump 37 stops working. Finally, control the pneumatic cylinder three 21 to contract, and the sign transparent casing 43 is pulled to move upward.

[0037] Subsequently, control the pneumatic cylinder two 16 to work again, so that the mounting bracket four 36 moves to a preset position on the top of the U-shaped bracket 6, and the sign transparent casing 43 moves to the top of the U-shaped bracket 6. The pneumatic cylinder two 16 stops working.

[0038] Subsequently, control the pneumatic cylinder three 21 to work to push the sign transparent casing 43 to move downward. The sign transparent casing 43 presses on the top of the sign base 44. Subsequently, control the lower welding arm to work, drive the four welding machines 13 to move along a preset trajectory, and the welding machines 13 work synchronously to weld the contact positions of the sign transparent casing 43 and the sign base 44, and then the welding work of the sign transparent casing 43 and the sign base 44 can be completed. The staff edits the control program in advance according to the working requirements of structures such as the conveyor belt 1, the pneumatic cylinder two 16, the pneumatic cylinder three 21, the air extraction pump 37, the air duct 38, and the double-axis pneumatic cylinder 51. Then stack a plurality of sign transparent casings 43 at a preset position in advance, and then the preparation work for welding and fixing the sign base 44 and the sign transparent casing 43 can be completed, reducing the participation of the staff in the welding process of the sign base 44 and the sign transparent casing 43, ensuring the accuracy of the guiding and positioning between the sign transparent casing 43 and the sign base 44, reducing the possibility of structural damage on the sign base 44, and improving the processing speed and quality of the traffic safety sign composed of the sign transparent casing 43 and the sign base 44.

[0039] After the welding process of the transparent sign housing 43 and the sign base 44 is completed, control the third pneumatic cylinder 21 to contract a certain distance. The third pneumatic cylinder 21 drives the second mounting bracket 22, the third mounting bracket 23, and the fourth mounting bracket 36 to move upward by a certain distance. At this time, the traffic safety sign composed of the transparent sign housing 43 and the sign base 44 is subjected to an upward force. A tension detector 35 is fixedly installed between the third mounting bracket 23 and the fourth mounting bracket 36. When the traffic safety sign is separated from the conveyor belt 1, the weight of the traffic safety sign acts on the tension detector 35, and the weight data detected by the tension detector 35 is fed back to the human-machine interaction device. When the weight value detected by the tension detector 35 reaches above the preset value, it indicates that the sign base 44 is suspended and the sign base 44 has not separated from the transparent sign housing 43 due to the influence of gravity, and the welding between the sign base 44 and the transparent sign housing 43 is relatively stable, completing the work of detecting the welding firmness of the transparent sign housing 43 and the sign base 44, shortening the processing cycle of the traffic safety sign and reducing the cost investment; Then control the solenoid valve 39 to work and open, so that the inside of the vacuum chuck 42 is depressurized, and the transparent sign housing 43 loses its fixation. The traffic safety sign falls back to the top of the conveyor belt 1 under the action of gravity; control the third pneumatic cylinder 21 to contract and reset, control the first pneumatic cylinder 5 to work, and move the U-shaped frame 6 upward to provide space for the movement of the traffic safety sign, and control the conveyor belt 1 to work to convey the traffic safety sign away.

[0040] When the weight value detected by the tension detector 35 does not reach the preset value, it means that after the transparent sign housing 43 moves upward, the sign base 44 separates from the transparent sign housing 43 under the action of gravity, and the welding process between the transparent sign housing 43 and the sign base 44 fails. The human-machine interaction device controls the forward and reverse motor two 27 to rotate forward, driving the third mounting bracket 23 to rotate a certain angle, the fourth mounting bracket 36 to rotate a certain angle, and the fourth mounting bracket 36 drives the transparent sign housing 43 to rotate a certain angle through the clamping assembly. Then control the solenoid valve 39 to work and open, and the inside of the vacuum chuck 42 is depressurized. The transparent sign housing 43 after the angle change falls to the top of the sign base 44; then control the third pneumatic cylinder 21 to work and contract, and the fourth mounting bracket 36 moves upward to reset. During this process, control the forward and reverse motor two 27 to rotate in reverse to restore the relative position between the second mounting bracket 22 and the third mounting bracket 23. Then control the first pneumatic cylinder 5 to work to push the U-shaped frame 6 upward, and the conveyor belt 1 works to convey. The transparent sign housing 43 and the sign base 44 move. Subsequently, the staff can simply and conveniently screen the successfully welded traffic safety signs from the transparent sign housing 43 and the sign base 44 that need to resume work according to the relative position between the transparent sign housing 43 and the sign base 44, reducing the labor cost investment required for the processing of traffic safety signs.

[0041] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A welding guide robot arm for batch processing of traffic safety signs, comprising a conveyor belt (1), a transparent shell of a sign (43) and a base of the sign (44), characterized in that: A lower welding arm is mounted on the conveyor belt (1), a pneumatic cylinder 1 (5) is arranged between the lower welding arm and the conveyor belt (1), a guide clamping arm is arranged on the top of the lower welding arm, the guide clamping arm comprises a pneumatic cylinder 2 (16) arranged on the top of the conveyor belt (1), a mounting frame 1 (18) fixedly mounted on one end of the pneumatic cylinder 2 (16), a pneumatic cylinder 3 (21) fixedly passed through the mounting frame 1 (18), a mounting frame 2 (22) fixedly mounted on the piston end of the pneumatic cylinder 3 (21), a mounting frame 3 (23) rotatably arranged at the bottom of the mounting frame 2 (22), and a tension detector (35) and two telescopic rods 3 (33) fixedly mounted at the bottom of the mounting frame 3 (23), a mounting frame 4 (36) fixedly mounted at the bottom of the tension detector (35), a clamping assembly is installed on the mounting frame 4 (36), and a rotation control assembly is arranged between the mounting frame 2 (22) and the mounting frame 3 (23).

2. The welding guide robot arm for batch processing of traffic safety signs according to claim 1, characterized in that: A fixing frame five (15) is fixedly sleeved on the outer side of the pneumatic cylinder two (16), a guide frame (17) is fixedly mounted on one side of the fixing frame five (15), two guide rings (20) are arranged on both sides of the guide frame (17), a telescopic rod two (19) is fixedly penetrated inside the guide ring (20), the outer shell of the telescopic rod two (19) is fixedly penetrated on the mounting frame one (18), and the piston end of the telescopic rod two (19) is fixedly connected to the mounting frame two (22).

3. The welding guide robot arm for batch processing of traffic safety signs according to claim 1, characterized in that: The rotation control assembly comprises a transmission shaft (31) rotatably connected to the bottom of the second mounting frame (22), a second gear (30) fixedly mounted on the outside of the transmission shaft (31), a first gear (29) meshing with one side of the second gear (30), and a sixth fixed frame (26) arranged on the outside of the second gear (30), wherein the sixth fixed frame (26) is fixedly mounted on the bottom of the second mounting frame (22), a plane bearing (25) is fixedly mounted between the bottom of the sixth fixed frame (26) and the third mounting frame (23), an annular groove (24) is provided on the top of the third mounting frame (23), and the plane bearing (25) and the sixth fixed frame (26) are both arranged inside the annular groove (24).

4. The welding guide robot arm for batch processing of traffic safety signs according to claim 3 is characterized in that: Two fixed vertical plates (28) are fixedly installed on the top of the second mounting frame (22), and a forward and reverse motor (27) is fixedly installed between the two fixed vertical plates (28). The output end of the second forward and reverse motor (27) passes through the gear (29) and is fixedly connected to the gear (29). The bottom end of the transmission shaft (31) is fixedly connected to the third mounting frame (23). A groove (32) is provided on the top of the third mounting frame (23), and the gear (30) and the gear (29) are both arranged inside the groove (32).

5. The welding guide robot arm for batch processing of traffic safety signs according to claim 1, characterized in that: The piston ends of the two telescopic rods three (33) are fixedly connected to the mounting frame four (36), and two support rods (34) are fixedly mounted on the bottom of the mounting frame three (23).

6. The welding guide robot arm for batch processing of traffic safety signs according to claim 1, characterized in that: The clamping assembly comprises an air pump (37) fixedly mounted on the top of the fourth mounting frame (36), an air guide pipe (38) fixedly mounted on the air inlet end of the air pump (37), an electromagnetic valve (39) fixedly mounted on one end of the air guide pipe (38), a junction frame (40) fixedly connected to the electromagnetic valve (39), and four air suction pipes (41) fixedly connected to the junction frame (40), wherein the junction frame (40) is fixedly mounted on the top of the fourth mounting frame (36), and the bottom end of the air suction pipe (41) passes through the fourth mounting frame (36) and is fixedly mounted with a vacuum suction cup (42).

7. The welding guide robot arm for batch processing of traffic safety signs according to claim 1, characterized in that: The lower welding arm comprises a mouth-shaped frame (6) arranged on the top of the conveyor belt (1), four welding machines (13) arranged inside the mouth-shaped frame (6), and a guide and correction component arranged on the front side of the inner cavity of the mouth-shaped frame (6); a gear box (8) and a forward and reverse motor (7) are arranged on the front side and the right side 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 gear box (8) on the same side; a plurality of fixed short rods (9) are fixedly installed between the forward and reverse motor (7) and the gear box (8) and the mouth-shaped frame (6); and screw rods (10) are fixedly installed on both output ends of the gear box (8).

8. The welding guide robot arm for batch processing of traffic safety signs according to claim 7, characterized in that: Four guide cavities (14) are provided inside the mouth-shaped frame (6), and the four screw rods (10) respectively penetrate the four guide cavities (14). The screw rods (10) are rotatably connected to the mouth-shaped frame (6). The outer sides of the two screw rods (10) installed on the front gear box (8) are provided with a fixing frame four (12) through a nut pair sleeve, and one end of the fixing frame 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 outer sides of the two screw rods (10) installed on the right gear box (8) are provided with a fixing frame three (11) through a nut pair sleeve, and one end of the fixing frame three (11) extends to the outside of the guide cavity (14) and is fixedly connected to the welding machine (13) on the same side.

9. The welding guide robot arm for batch processing of traffic safety signs according to claim 7, characterized in that: The guide calibration component comprises a pneumatic cylinder four (45) fixedly mounted on the front side of the inner cavity of the mouth-shaped frame (6), a mounting frame five (46) fixedly mounted on the piston end of the pneumatic cylinder four (45), and a pneumatic cylinder five (47) and a telescopic rod four (48) fixedly mounted on one side of the mounting frame five (46); a hollow frame (49) is fixedly mounted between the piston ends of the pneumatic cylinder five (47) and the telescopic rod four (48); a pressure sensor (50) is fixedly mounted on the top of the hollow frame (49); a double-axis pneumatic cylinder (51) is fixedly mounted inside the hollow frame (49); sliding frames (52) are fixedly mounted on both piston ends of the double-axis pneumatic cylinder (51); the sliding frame (52) is slidably connected to the hollow frame (49); and a push plate (53) is fixedly mounted on one side of the sliding frame (52).

10. The welding guide robot arm for batch processing of traffic safety signs according to claim 7, characterized in that: The two sides of the mouth-shaped frame (6) are fixedly mounted with a fixing frame 2 (4), the bottoms of the two fixing frames 2 (4) are both provided with a fixing frame 1 (2), the fixing frame 1 (2) is fixedly connected to the outer shell of the conveyor belt (1), one of the fixing frames 1 (2) is fixedly inserted with two telescopic rods 1 (3), the piston ends of the two telescopic rods 1 (3) are fixedly connected to the fixing frame 2 (4) on the same side, the pneumatic cylinder 1 (5) is fixedly inserted on the other fixing frame 1 (2), and the piston end of the pneumatic cylinder 1 (5) is fixedly connected to the fixing frame 2 (4) on the same side.

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