Automatic welding robot for automatic metal bellows

Abstract

The invention discloses an automatic metal corrugated pipe automatic welding robot which comprises a support, two connecting blocks are fixedly connected to the inner side of the support, a fixing plate is fixedly connected between the two connecting blocks, a supporting ring is fixedly connected to the bottom of the fixing plate, and the left side and the right side of the supporting ring are each sleeved with a sealing box rotationally connected with the supporting ring. The two closed boxes are arranged in a circular shape, and the local sections of the two closed boxes are arranged in a C shape. According to the welding device, the welding area can be sealed, the situation that a corrugated pipe or a connector is damaged by reflected laser generated in the welding process or splashes generated in the welding process is effectively avoided, the splashes can be brought out of the welding area through flowing protective gas argon, and the welding efficiency is improved. And the situation that splash falls on the surface of a weld joint to affect the welding quality is effectively avoided, and then the welding quality of the robot on the corrugated pipe can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding robots, and more specifically to an automatic metal bellows welding robot. Background Art

[0002] The automatic metal bellows welding robot is an automated device specially used for metal bellows welding operations. Metal bellows are widely used in many fields such as aerospace, petrochemical, instrumentation, etc. The welding quality is directly related to the performance and service life of the bellows. This welding robot can replace manual labor for precise and efficient welding operations.

[0003] When the automatic welding robot welds two bellows together or welds a bellows to a joint, part of the laser will be reflected from the welding surface due to the certain reflectivity of the metal surface to the laser. If the energy of the reflected laser is large enough and the reflection direction points to the metal bellows part near the weld, it may cause damage to it. In addition, during the welding process, due to the violent fluctuation of the molten pool and the arc force (if it is arc welding) or laser evaporation (if it is laser welding), welding spatter will be generated. These spatters are mainly small molten metal particles. These spatters can easily damage the bellows. At the same time, if the spatters fall on the weld surface, it will seriously affect the quality of the bellows welding. Therefore, an automated metal bellows automatic welding robot is needed. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an automatic metal bellows automatic welding robot to solve the above-mentioned background technical problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: An automated metal bellows automatic welding robot comprises a bracket, wherein two connecting blocks are fixedly connected to the inner side of the bracket, a fixing plate is fixedly connected between the two connecting blocks, a supporting ring is fixedly connected to the bottom of the fixing plate, a closing box rotatably connected to the supporting ring is sleeved on the left and right sides of the supporting ring, a sealing ring is embedded in the inner walls of the two closing boxes, the two closing boxes are circular in shape, the partial cross-sections of the two closing boxes are C-shaped, a track ring is fixedly connected to the inner side of the two closing boxes, a track groove rotatably connected to the track ring is provided on the left and right sides of the supporting ring, two driving mechanisms for driving the track ring to rotate are provided on the supporting ring, a clamping mechanism is provided on the left and right sides of the two closing boxes, and the fixing plate A welding gun is installed on the top, and the bottom end of the welding gun penetrates the fixing plate and the supporting ring in sequence and extends to the inner side of the supporting ring, and the bottom of the supporting ring is fixedly connected to two blocks, and the outer sides of the two blocks are slidably connected to the inner sides of the two closed boxes respectively. The top of the fixing plate is fixedly connected to an air inlet pipe and an air outlet pipe, and the bottom ends of the air inlet pipe and the air outlet pipe penetrate the fixing plate and the supporting ring in sequence and are respectively inserted into the two blocks, the bottom end of the air inlet pipe is located on the bottom surface of the back block, and the air outlet pipe is located on the back side of the front block, the top of the air inlet pipe is connected to an air inlet box, and an air pump is installed on the air inlet pipe and the air outlet pipe, the top of the air inlet box is fixedly connected to a gas tank, the bottom of the gas tank is connected to a gas filling pipe, and a solenoid valve 2 is installed on the gas filling pipe.

[0006] As a further description of the above technical solution: The driving mechanism includes two motors, both of which are installed inside the support ring, and the output shafts of the two motors pass through the support ring and extend to the inside of the two track grooves respectively. The output shafts of the two motors are fixedly connected with gears, and grooves are provided on the opposite sides of the two track rings. The shape of the two grooves is annular, and the inner walls of the two grooves are provided with teeth meshing with the gears.

[0007] As a further description of the above technical solution: The clamping mechanism includes a fixing ring, one side of which is fixedly connected to the closing box, a driving ring is sleeved on the fixing ring and is threadedly connected to the fixing ring, a ring-shaped sliding rod is inserted through the fixing ring, a driving groove is provided on the inner side of the driving ring, and the driving groove is shaped like a trumpet, one end of the sliding rod is in contact with the inner wall of the driving groove, and the other end of the sliding rod is fixedly connected to a clamping plate, one side of which is slidably connected to the closing box.

[0008] As a further description of the above technical solution: The top end of the air outlet pipe is connected with a filter box, the front side of the filter box is interspersed with a filter plate and an active layer which are slidably connected with the filter box, and the back side of the filter box is provided with an air outlet groove.

[0009] As a further description of the above technical solution: The back of the filter box is fixedly connected with a mounting box, the inner wall of the mounting box is fixedly connected with a moisture absorbing layer, and the back of the mounting box is connected with an exhaust pipe.

[0010] As a further description of the above technical solution: The exhaust pipe is connected with a return pipe, one end of the back side of the return pipe is connected with the air inlet box, and the return pipe and the exhaust pipe are both equipped with a solenoid valve three.

[0011] As a further description of the above technical solution: The back side of the air inlet box is connected with a conduit, a solenoid valve 1 is installed on the conduit, and an electric heating rod is fixedly connected to the inner wall of the air inlet box.

[0012] As a further description of the above technical solution: An infrared absorption sensor is installed on the inner wall of the air intake box, and a controller is installed on the air intake box. The output end of the controller is respectively connected to the signals of the second solenoid valve, the third solenoid valve and the first solenoid valve.

[0013] As a further description of the above technical solution: An electric push rod fixedly connected to the top of the fixed plate is inserted, and the top of the electric push rod is fixedly connected to the welding gun. The outer side of the welding gun is slidingly connected to the fixed plate and the support ring respectively. A distance sensor is installed on the inner side of the support ring, and the output end of the distance sensor is connected to the controller signal.

[0014] As a further description of the above technical solution: The bottom of the support ring is connected to a vertical pipe, and the vertical pipe is connected to a cleaning pipe and a feeding pipe. Valves are installed on the vertical pipe, the cleaning pipe and the feeding pipe. An observation port is opened on the support ring, and a transparent plate is fixedly connected to the inner wall of the observation port. An air pressure sensor is installed on the inner wall of the support ring.

[0015] Compared with the prior art, the advantages of the present invention are: This solution can seal the welding area, effectively preventing the reflected laser or spatter generated during the welding process from damaging the bellows or joints, and the spatter can be taken out of the welding area by the flowing protective gas argon, effectively preventing the spatter from falling on the weld surface and affecting the welding quality, thereby improving the quality of the robot's welding of the bellows; The flowing protective gas argon is processed and then re-enters the welding area, thereby realizing the reuse of argon, saving the use of argon and reducing welding costs; And the distance between the weld and the welding gun can be adjusted, so that the welding gun and the weld are always kept at the appropriate value, thereby improving the uniformity of welding and improving the quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional diagrams of the present invention; Figure 2 This is the second stereogram of the present invention; Figure 3 The third is a three-dimensional diagram of the present invention; Figure 4 The fourth is a three-dimensional diagram of the present invention; Figure 5 It is a partial side sectional view of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of part A in the middle; Figure 7 It is a partial cross-sectional view of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of middle part B; Fig. 9 It is a partial schematic diagram of the middle track ring and the track groove of the present invention.

[0017] Description of the numbers in the figure: 1. Bracket; 2. Connecting block; 3. Fixing plate; 4. Support ring; 5. Closing box; 6. Track ring; 7. Track groove; 8. Driving mechanism; 801. Motor; 802. Gear; 803. Groove; 9. Clamping mechanism; 901. Fixing ring; 902. Driving ring; 903. Sliding rod; 904. Driving groove; 905. Clamping plate; 10. Welding gun; 11. Stopper; 12. Inlet pipe; 13. Outlet pipe; 14. Inlet box; 15. Air pump; 16. Conduit; 17. Solenoid valve 1; 18. Air tank; 19, gas filling pipe; 20, solenoid valve 2; 21, filter box; 22, filter plate; 23, active layer; 24, air outlet groove; 25, installation box; 26, moisture absorption layer; 27, exhaust pipe; 28, return pipe; 29, solenoid valve 3; 30, electric heating rod; 31, infrared absorption sensor; 32, controller; 33, electric push rod; 34, distance sensor; 35, vertical pipe; 36, cleaning pipe; 37, feeding pipe; 38, valve; 39, observation port; 40, transparent plate; 41, air pressure sensor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention; See also Figures 1 to 9 In the present invention: an automated metal bellows automatic welding robot comprises a bracket 1, two connecting blocks 2 are fixedly connected to the inner side of the bracket 1, a fixing plate 3 is fixedly connected between the two connecting blocks 2, a supporting ring 4 is fixedly connected to the bottom of the fixing plate 3, a closing box 5 rotatably connected to the supporting ring 4 is sleeved on the left and right sides of the supporting ring 4, a sealing ring is embedded in the inner walls of the two closing boxes 5, the two closing boxes 5 are circular in shape, the partial cross-sections of the two closing boxes 5 are C-shaped, the inner sides of the two closing boxes 5 are fixedly connected to a track ring 6, the left and right sides of the supporting ring 4 are provided with a track groove 7 rotatably connected to the track ring 6, and the supporting ring 4 is provided with two A driving mechanism 8 drives the track ring 6 to rotate, a clamping mechanism 9 is provided on the left and right sides of the two closed boxes 5, a welding gun 10 is installed on the top of the fixed plate 3, the bottom end of the welding gun 10 penetrates the fixed plate 3 and the support ring 4 in sequence and extends to the inner side of the support ring 4, the bottom of the support ring 4 is fixedly connected with two blocks 11, the outer sides of the two blocks 11 are respectively slidably connected with the inner sides of the two closed boxes 5, an air inlet pipe 12 and an air outlet pipe 13 are fixedly connected to the top of the fixed plate 3, the bottom ends of the air inlet pipe 12 and the air outlet pipe 13 penetrate the fixed plate 3 and the support ring 4 in sequence and are respectively inserted on the two blocks 11, and the bottom end of the air inlet pipe 12 is located at the back block 11 The bottom surface of the front block 11 is provided with an air outlet pipe 13, an air inlet box 14 is connected to the top of the air inlet pipe 12, an air pump 15 is installed on the air inlet pipe 12, a gas tank 18 is fixedly connected to the top of the air inlet box 14, a gas filling pipe 19 is connected to the bottom of the gas tank 18, and a solenoid valve 20 is installed on the gas filling pipe 19; the driving mechanism 8 includes two motors 801, both of which are installed inside the support ring 4, and the output shafts of the two motors 801 penetrate the support ring 4 and extend to the inside of the two track grooves 7 respectively, and the output shafts of the two motors 801 are fixedly connected to the gears 802, and grooves 803 are provided on the opposite sides of the two track rings 6. The two grooves 803 are both annular in shape, and the inner walls of the two grooves 803 are both provided with teeth meshing with the gear 802; the clamping mechanism 9 includes a fixing ring 901, one side of the fixing ring 901 is fixedly connected to the closing box 5, a driving ring 902 is sleeved on the fixing ring 901 and is threadedly connected to it, and a ring-shaped sliding rod 903 is inserted on the fixing ring 901, and a driving groove 904 is provided on the inner side of the driving ring 902, and the driving groove 904 is shaped like a trumpet, one end of the sliding rod 903 is in contact with the inner wall of the driving groove 904, and the other end of the sliding rod 903 is fixedly connected to a clamping plate 905, and one side of the clamping plate 905 is slidably connected to the closing box 5.

[0019] In the present invention, when welding two metal bellows or welding a metal bellows to a joint, firstly, the metal bellows or the joint is inserted into the closing box 5, the diameter of the closing box 5 is matched with the metal bellows and the joint, and a sealing ring is arranged on the inner side of the closing box 5, which is used to seal between the closing box 5 and the metal bellows or the joint, and can avoid damage to the metal bellows. After the metal bellows or the joint is inserted into the closing box 5, the two metal bellows or a metal bellows and the joint will contact each other, and the contacting part is the position of the weld to be welded. The user can change the position of the weld by pushing the metal bellows, and place the weld position in the gap between the two closing boxes 5. At this time, the welding gun 10 located between the two closing boxes 5 will just align with the weld, thereby completing the positioning of the metal bellows or the joint.

[0020] After the positioning is completed, the user rotates the two driving rings 902, and the two driving rings 902 will move toward each other along the fixed ring 901. During the movement of the driving ring 902, the arc surface of the driving groove 904 will squeeze the sliding rod 903. After being squeezed, the sliding rod 903 will drive the clamping plate 905 to slide along the closing box 5. After all the clamping plates 905 are tightly attached to the metal bellows or joints, the metal bellows or joints are clamped and fixed. At this time, the preparation work before welding is completed.

[0021] Then turn on the welding gun 10, and the welding gun 10 performs laser welding on the metal bellows or the joint. During the process, the user turns on the motor 801 to drive the gear 802 to rotate. The gear 802 meshes with the teeth on the inner side of the groove 803, so after the motor 801 is turned on, it will drive the track ring 6 to rotate. After the track ring 6 rotates, it will rotate along the inner wall of the track groove 7. During the process, the track ring 6 will drive the closing box 5 to rotate. During the rotation of the closing box 5, it will drive the metal bellows or the joint to rotate, thereby changing the welding area. When the closing box 5 rotates one circle, the welding of the two metal bellows or the metal bellows and the joint is completed.

[0022] During the welding process, the user opens the solenoid valve 20. At this time, the argon gas in the gas tank 18 will enter the air inlet box 14 from the gas filling pipe 19. The argon gas will then be pumped into the closed space composed of the support ring 4, two closing boxes 5 and two blocks 11 by the air pump 15 through the air inlet pipe 12. The argon gas will then be pumped out by the air pump 15 on the air outlet pipe 13. The argon gas will pass through the welding area during the flow. The argon gas can prevent oxidation and stabilize the arc, thereby effectively improving the welding effect.

[0023] During the flow of argon gas, it will drive the spatter generated by welding, thereby effectively reducing the damage caused by spatter to metal bellows or joints, and can reduce the occurrence of spatter falling on the subsequent welding seam area, thereby reducing the impact of spatter on welding and improving the quality of welding.

[0024] Moreover, during the welding process, the welding gun 10 will be located in a closed space formed by the support ring 4, two closing boxes 5 and two blocks 11, and the reflected laser generated by the welding will be trapped. The reflected laser cannot contact the metal bellows or joints, thereby protecting the metal bellows or joints.

[0025] See also Figures 1 to 6 , wherein: the top end of the air outlet pipe 13 is connected with a filter box 21, the front of the filter box 21 is interspersed with a filter plate 22 and an active layer 23 which are slidably connected thereto, and the back of the filter box 21 is provided with an air outlet groove 24; the back of the filter box 21 is fixedly connected with a mounting box 25, the inner wall of the mounting box 25 is fixedly connected with a moisture absorption layer 26, and the back of the mounting box 25 is connected with an exhaust pipe 27; the exhaust pipe 27 is connected with a return pipe 28, one end of the back of the return pipe 28 is connected with the air inlet box 14, and both the return pipe 28 and the exhaust pipe 27 are equipped with a solenoid valve three 29.

[0026] In the present invention, during the welding process, the user closes the solenoid valve three 29 on the exhaust pipe 27 and opens the solenoid valve three 29 on the return pipe 28. At this time, the argon gas discharged from the gas tank 18 flows through the welding area and enters the filter box 21. The splashes brought by the argon gas will be filtered by the filter plate 22 and the active layer 23 in the installation box 25, and the fixed hygroscopic layer 26 in the installation box 25 can filter the moisture in the exhaust gas, thereby achieving the effect of exhaust gas treatment. There is a certain concentration of argon gas in the treated exhaust gas. At this time, the argon gas will re-enter the air inlet box 14 and re-enter the welding space to prevent oxidation and stabilize the arc. In this process, the solenoid valve two 20 is closed to stop the release of argon gas, so that an appropriate amount of argon gas is allowed to flow between the air inlet pipe 12 and the air outlet pipe 13. The argon gas circulates in the air, thereby effectively reducing the use of argon gas. The argon gas is reused by filtering out spatter, moisture and harmful substances in the argon gas. The exhausted argon gas contains a certain temperature. The reused argon gas enters the welding area from the air inlet pipe 12 and sprays onto the surface of the weld to be welded subsequently. The temperature of the argon gas can preheat the metal bellows and joints in the weld area, thereby effectively reducing welding stress and deformation. Preheating can improve the crystallization condition of the weld metal. When welding is performed in the preheated weld area, the cooling rate of the weld metal will slow down, which is beneficial to the grain refinement in the weld metal, thereby improving the strength of the material, and also improving the toughness, so that the weld is not easy to break when subjected to external force, and reducing the generation of cracks in the weld, thereby improving the welding quality.

[0027] See also Figure 6 , wherein: the back of the air inlet box 14 is connected to a conduit 16 , a solenoid valve 17 is installed on the conduit 16 , and an electric heating rod 30 is fixedly connected to the inner wall of the air inlet box 14 .

[0028] In the present invention, after completing the clamping and positioning of the metal bellows or joint, the user closes the solenoid valve 20 and the solenoid valve 3 29 on the return pipe 28, and opens the solenoid valve 3 29 and the solenoid valve 1 17 on the exhaust pipe 27. At this time, the two air pumps 15 are turned on, and the outside air will enter the air intake box 14 from the conduit 16, and the air will be sprayed from the air intake pipe 12 to the weld area of ​​the bellows. The air will blow away the dust attached to the weld surface. At this time, the user turns on the motor 801 to indirectly drive the bellows to rotate, thereby achieving the effect of cleaning the entire weld, effectively avoiding the situation where oil and dust at the weld affect subsequent welding. During the cleaning process, turning on the electric heating rod 30 can heat the air. The heated air helps to clean the weld of the bellows, and can also preheat the bellows, which is beneficial to improving the quality of bellows welding.

[0029] See also Figure 3 and 6 , wherein: an infrared absorption sensor 31 is installed on the inner wall of the air intake box 14, a controller 32 is installed on the air intake box 14, and the output end of the controller 32 is respectively connected to the solenoid valve 20, the solenoid valve 3 29 and the solenoid valve 1 17 signal.

[0030] In the present invention, the infrared absorption sensor 31 installed on the inner wall of the air inlet box 14 can detect the argon content in the gas that is reused after filtration. If the argon content is lower than the minimum value, the solenoid valve three 29 on the return pipe 28 is closed, and the solenoid valve three 29 and the solenoid valve two 20 on the exhaust pipe 27 are opened. The circulating gas will be discharged from the exhaust pipe 27, and new argon will be re-injected into the welding area from the air inlet pipe 12. After the circulating gas is discharged, the solenoid valve three 29 on the return pipe 28 is reopened and the solenoid valve three 29 and the solenoid valve two 20 on the exhaust pipe 27 are closed, so that the gas can be recycled again, thereby maintaining sufficient argon content in the welding area and improving the welding stability of the device.

[0031] See also Figure 6 , wherein: an electric push rod 33 fixedly connected to the top of the fixed plate 3 is inserted, the top of the electric push rod 33 is fixedly connected to the welding gun 10, the outer side of the welding gun 10 is slidingly connected to the fixed plate 3 and the support ring 4 respectively, and a distance sensor 34 is installed on the inner side of the support ring 4, and the output end of the distance sensor 34 is connected to the controller 32 signal.

[0032] In the present invention, during the welding process, the distance sensor 34 will detect the distance between the distance to the weld seam, and then know the length of the weld seam from the welding gun 10. When the corrugated tube is not a perfect circle, the distance between the welding gun 10 and the weld seam of the corrugated tube will change during welding. At this time, the electric push rod 33 can drive the welding gun 10 to rise and fall, thereby changing the distance between the welding gun 10 and the weld seam, and controlling the welding gun 10 to always maintain a normal distance from the weld seam, which can effectively improve the quality of the bellows welding and avoid the situation where the bellows is not a perfect circle and the welding quality is reduced.

[0033] See also Figure 5 , 8 9, wherein: the bottom of the support ring 4 is connected with a vertical pipe 35, the vertical pipe 35 is connected with a cleaning pipe 36 and a feeding pipe 37, valves 38 are installed on the vertical pipe 35, the cleaning pipe 36 and the feeding pipe 37, an observation port 39 is opened on the support ring 4, a transparent plate 40 is fixedly connected to the inner wall of the observation port 39, and an air pressure sensor 41 is installed on the inner wall of the support ring 4.

[0034] In the present invention, after the first welding is completed, acid or alkali solution is flushed into the support ring 4 through the feeding pipe 37 (selected according to the need to clean the welding slag), and the acid or alkali solution will gather in the annular space formed by the support ring 4 and the closing box 5. The cross-sectional shape of the track ring 6 is set in a T-shape, which can effectively realize the sealing treatment between the support ring 4 and the closing box 5. For example, until the acid or alkali solution fills 80% of the space of the support ring 4 (the filling ratio of the acid or alkali solution is adjustable), a part of the area at the bottom of the welding gun 10 is reserved, and then the solenoid valve 2 20 on the gas filling pipe 19 is opened, and the solenoid valve 1 17 and the solenoid valve 3 29 are closed. At this time, nitrogen will be injected into the reserved part, and the air pressure sensor 41 will perform air pressure detection on the nitrogen. By observing the change in the pressure value, it can be determined whether there is leakage in the weld within a specific range. In conjunction with the rotation of the pipe, the sealing of the weld after the first welding in a specific range can be determined in batches. The acid or alkali solution can clean the welding slag during the rolling process. In the above, the immersion process of acid cleaning or alkali cleaning is carried out simultaneously with the detection of the tightness of the weld in the range, which is more efficient. In addition, the nitrogen gas is stable in nature and is not suitable for reacting with acid or alkali, which provides good conditions for batch detection of pipe welds. After that, whether the weld tightness is unqualified or qualified, the valve 38 on the vertical pipe 35 is opened to discharge the acid or alkali solution together with the welding slag. Then, the valve 38 on the cleaning pipe 36 is opened, and the cleaning liquid is injected into the cleaning pipe 36 to rinse the acid or alkali solution attached to the bellows and the equipment. If it is qualified, it can be directly taken out. If it is unqualified, it can be washed with clean water. After drying, it is convenient for the subsequent repair welding operation to be carried out. When an unqualified situation is detected, the user observes the bellows through the transparent plate 40 to determine the problem of the weld, which is convenient for accurate repair welding and improves the practicality of the device.

[0035] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automated metal bellows welding robot, comprising a bracket (1), characterized in that: Two connecting blocks (2) are fixedly connected to the inner side of the bracket (1); a fixing plate (3) is fixedly connected between the two connecting blocks (2); a supporting ring (4) is fixedly connected to the bottom of the fixing plate (3); a closed box (5) rotatably connected to the supporting ring (4) is sleeved on the left and right sides of the supporting ring (4); a sealing ring is embedded in the inner walls of the two closed boxes (5); the two closed boxes (5) are circular in shape; the partial cross-sections of the two closed boxes (5) are C-shaped; a track ring (6) is fixedly connected to the inner side of the two closed boxes (5); a track groove (7) rotatably connected to the track ring (6) is opened on the left and right sides of the supporting ring (4); two driving mechanisms (8) for driving the track ring (6) to rotate are arranged on the supporting ring (4); a clamping mechanism (9) is arranged on the left and right sides of the two closed boxes (5); a welding gun (10) is installed on the top of the fixing plate (3); the bottom end of the welding gun (10) passes through the fixing plate (3) and the supporting ring (4) in sequence; The support ring (4) extends to the inner side of the support ring (4); the bottom of the support ring (4) is fixedly connected to two blocks (11); the outer sides of the two blocks (11) are respectively slidably connected to the inner sides of the two closing boxes (5); the top of the fixed plate (3) is fixedly connected to an air inlet pipe (12) and an air outlet pipe (13); the bottom ends of the air inlet pipe (12) and the air outlet pipe (13) penetrate the fixed plate (3) and the support ring (4) in sequence and are respectively inserted into the two blocks (11); The bottom end of the air pipe (12) is located on the bottom surface of the back block (11), the air outlet pipe (13) is located on the back surface of the front block (11), the top end of the air inlet pipe (12) is connected to an air inlet box (14), an air pump (15) is installed on both the air inlet pipe (12) and the air outlet pipe (13), the top of the air inlet box (14) is fixedly connected to a gas tank (18), the bottom of the gas tank (18) is connected to a gas filling pipe (19), and a solenoid valve 2 (20) is installed on the gas filling pipe (19).

2. The automatic metal bellows welding robot according to claim 1 is characterized in that: The driving mechanism (8) comprises two motors (801), the two motors (801) are both mounted inside the support ring (4), the output shafts of the two motors (801) pass through the support ring (4) and extend into the inside of the two track grooves (7) respectively, the output shafts of the two motors (801) are both fixedly connected to a gear (802), the two track rings (6) are each provided with a groove (803) on one side opposite to the other, the two grooves (803) are both annular in shape, and the inner walls of the two grooves (803) are each provided with teeth meshing with the gear (802).

3. The automatic metal bellows welding robot according to claim 1 is characterized in that: The clamping mechanism (9) comprises a fixing ring (901), one side of the fixing ring (901) is fixedly connected to the closing box (5), a driving ring (902) is sleeved on the fixing ring (901) and is threadedly connected to the fixing ring (901), a ring-shaped sliding rod (903) is inserted through the fixing ring (901), a driving groove (904) is provided on the inner side of the driving ring (902), and the driving groove (904) is shaped like a trumpet, one end of the sliding rod (903) is in contact with the inner wall of the driving groove (904), and the other end of the sliding rod (903) is fixedly connected to a clamping plate (905), and one side of the clamping plate (905) is slidably connected to the closing box (5).

4. The automatic metal bellows welding robot according to claim 1 is characterized in that: The top end of the air outlet pipe (13) is connected to a filter box (21), a filter plate (22) and an active layer (23) slidably connected thereto are inserted through the front of the filter box (21), and an air outlet groove (24) is provided on the back of the filter box (21).

5. The automatic metal bellows welding robot according to claim 4 is characterized in that: The back of the filter box (21) is fixedly connected to a mounting box (25), the inner wall of the mounting box (25) is fixedly connected to a moisture absorbing layer (26), and the back of the mounting box (25) is connected to an exhaust pipe (27).

6. The automatic metal bellows welding robot according to claim 5, characterized in that: The exhaust pipe (27) is connected to a return pipe (28), and a back end of the return pipe (28) is connected to the air inlet box (14). Solenoid valve three (29) is installed on both the return pipe (28) and the exhaust pipe (27).

7. The automatic metal bellows welding robot according to claim 1, characterized in that: The back side of the air intake box (14) is connected to a conduit (16), a solenoid valve (17) is installed on the conduit (16), and an electric heating rod (30) is fixedly connected to the inner wall of the air intake box (14).

8. The automatic metal bellows welding robot according to claim 1, characterized in that: An infrared absorption sensor (31) is installed on the inner wall of the air intake box (14), and a controller (32) is installed on the air intake box (14). The output end of the controller (32) is respectively connected to the electromagnetic valve 2 (20), the electromagnetic valve 3 (29) and the electromagnetic valve 1 (17) for signals.

9. The automatic metal bellows welding robot according to claim 8, characterized in that: An electric push rod (33) fixedly connected to the fixing plate (3) is inserted through the top of the fixing plate (3), the top of the electric push rod (33) is fixedly connected to the welding gun (10), the outer side of the welding gun (10) is slidably connected to the fixing plate (3) and the support ring (4), the inner side of the support ring (4) is installed with a distance sensor (34), and the output end of the distance sensor (34) is connected to the controller (32) for signal.

10. The automatic metal bellows welding robot according to claim 1, characterized in that: The bottom of the support ring (4) is connected to a vertical pipe (35), the vertical pipe (35) is connected to a cleaning pipe (36) and a feeding pipe (37), and valves (38) are installed on the vertical pipe (35), the cleaning pipe (36) and the feeding pipe (37). The support ring (4) is provided with an observation port (39), the inner wall of the observation port (39) is fixedly connected to a transparent plate (40), and the inner wall of the support ring (4) is installed with an air pressure sensor (41).

Images