Corrugated pipe welding device

Abstract

The invention relates to the technical field of welding fixing equipment, in particular to a corrugated pipe welding device which comprises a rack, a corrugated pipe fixing mechanism and a flange plate fixing mechanism, the corrugated pipe fixing mechanism is used for fixing a corrugated pipe and comprises a mounting base, an air pump, a heater, an air bag and a plurality of fixing rods, the mounting base is fixedly connected with the rack, the fixing rods are slidably connected with the mounting base, the fixing rods are distributed at intervals in the circumferential direction of the mounting base, an air duct is formed in the center of the mounting base, and the air bag is fixedly connected with the mounting base; through an inner fixing structure of the air bag and the fixing rod, the corrugated pipe can be effectively fixed and prevented from shaking in the welding process, and therefore the welding stability and the welding quality are improved; and hot air is introduced into the air bag to preheat the corrugated pipe, so that the welding stress can be eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixing equipment, in particular to a bellows welding device. Background Art

[0002] In industrial piping systems, the connection between bellows and flanges is a common structural form, and its stability and sealing are crucial to the safe operation of the entire system. Traditional welding methods have some obvious shortcomings when connecting bellows and flanges. During the welding process, due to the flexible characteristics of the bellows, it is easy to shake due to uneven heating or external force during welding, which not only affects the welding quality, but also may cause the bellows to deform after welding and affect its sealing performance. In addition, after the bellows and flanges are directly welded, due to the heat effect during the welding process, large welding stresses will be generated inside the material. If these stresses are not effectively released, they will accelerate the fatigue damage of the material and shorten the service life of the bellows.

[0003] In the existing technology, the welding and fixing of bellows and flanges usually rely on external clamps or supporting structures, which are often bulky and difficult to adjust, and difficult to adapt to bellows of different sizes and shapes. In addition, these external structures may cause additional stress concentration on the bellows during the welding process, further increasing the welding stress. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the technical problems in the prior art that the bellows is easy to shake due to its flexible characteristics during welding, affecting the welding quality and sealing performance, and the large welding stress generated after the bellows and the flange are directly welded, which is not effectively released, accelerates material fatigue damage and shortens the service life, a bellows welding device is provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a bellows welding device, comprising a frame, a bellows fixing mechanism and a flange fixing mechanism installed on the frame;

[0006] The bellows fixing mechanism is used to fix the bellows. The bellows fixing mechanism includes a mounting seat, an air pump, a heater, an air bag and a plurality of fixing rods. The mounting seat is fixedly connected to the frame, the fixing rod is slidably connected to the mounting seat, the fixing rods are spaced along the circumference of the mounting seat, an air passage is provided at the center of the mounting seat, the air bag is fixedly connected to the mounting seat, and the air bag surrounds the left end port of the air passage. The air bag is used to provide power for the radial movement of the fixing rod along the mounting seat and to resist the inner wall surface of the bellows. The heater is used to heat the air. The output end of the air pump is connected to the input end of the heater, and the output end of the heater is connected to the air bag. The air pump is used to blow air into the air bag to expand the air bag. Through the internal fixing structure of the air bag and the fixing rod, the bellows can be effectively fixed to prevent it from shaking during welding, thereby improving the welding stability and welding quality, simplifying the welding operation, reducing manual intervention, and improving the welding efficiency.

[0007] Hot air in the airbag preheats the bellows, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint;

[0008] The flange fixing mechanism is used to fix the flange;

[0009] The welding mechanism is used to weld bellows and flanges.

[0010] In order to solve the problem of unstable sliding of the fixed rod, a radially extending slide groove is further provided on the mounting seat, and a slide seat matching the slide groove is provided on the fixed rod. The slide groove and the slide seat correspond one to one, and the slide seat is slidably arranged in the corresponding slide groove.

[0011] In order to solve the problem that multiple fixed rods move asynchronously, making it inconvenient to locate the central axis of the bellows, the bellows fixing mechanism further includes a linkage assembly, which is used to connect the fixed rods so that the fixed rods move radially synchronously. The linkage assembly includes a sliding sleeve, a plurality of connecting rods and a plurality of transmission rods. The connecting rods correspond to the sliding seats one by one, and the connecting rods are fixedly connected to the corresponding sliding seats. A connecting portion is protruded on the right end surface of the mounting seat, and the connecting portion surrounds the air duct. The sliding sleeve and the connecting portion are slidably connected. The transmission rods correspond to the connecting rods one by one, and one end of the transmission rod is rotatably connected to the corresponding connecting rod, and the other end is rotatably connected to the sliding sleeve.

[0012] It further includes a flange fixing mechanism including a chuck and a first transverse driving member, the chuck is used to clamp the flange, the first transverse driving member is used to provide power for the flange on the chuck to move closer to or away from the bellows, the first transverse driving member is fixedly connected to the frame, and the output end of the first transverse driving member is fixedly connected to the chuck.

[0013] In order to solve the problem that the large welding stress generated after the bellows and the flange are welded, which is not effectively released and accelerates material fatigue damage, and the welding point is a circular weld and therefore requires circumferential tapping, the welding fixing tool further includes a stress relief device arranged on the frame, the stress relief device includes a striking hammer and a driving assembly, the striking hammer is used to strike the welding point between the bellows and the flange, and the driving assembly is used to provide power for the circumferential rotation of the striking hammer and for the striking hammer to strike the welding point between the bellows and the flange.

[0014] Further comprising a drive assembly including a ring gear, a sun gear, a mounting frame, a connecting frame, a second transverse drive member, a radial drive member, a transmission gear, a motor and a planetary gear;

[0015] The second transverse driving member is used to provide power for the transverse movement of the striking hammer, the second transverse driving member is fixedly connected to the frame, and the output end of the second transverse driving member is fixedly connected to the mounting frame;

[0016] The mounting frame is provided with a first through hole for the flange fixing mechanism to pass through, and the sun gear is fixedly connected to the mounting frame;

[0017] The sun gear is provided with a second through hole for the flange fixing mechanism to pass through;

[0018] The inner ring and the outer ring of the gear ring are both provided with teeth, and the gear ring is rotatably connected to the mounting frame;

[0019] The planetary gear is meshed with the sun gear, and the planetary gear is meshed with the inner ring of the gear ring, the planetary gear is rotationally connected to the connecting frame, and the connecting frame is rotationally connected to the mounting frame;

[0020] The transmission gear is meshed with the outer ring of the gear ring, and the output shaft of the motor is connected to the transmission gear;

[0021] The radial driving member is fixedly connected to the transmission gear, the striking hammer is arranged on the output end of the radial driving member, and the radial driving member is used to provide power for the radial movement of the striking hammer.

[0022] It further comprises an elastic connection between the striking hammer and the radial driving member, and a spring is arranged between the striking hammer and the output end of the radial driving member.

[0023] The invention further comprises a sliding cavity being opened on the frame, a sliding block matching the sliding cavity being arranged on the mounting frame, and the sliding block and the sliding cavity being slidably connected.

[0024] In order to solve the problem of insufficient stability of the airbag fixing bellows, the airbag is further provided with a protrusion matching the bellows.

[0025] The welding mechanism further includes a welding bracket, a welding motor, a welding gear, a welding gear ring, a third transverse drive, a welding radial drive and a welding gun. The welding bracket is slidably connected to the frame, the third transverse drive is fixedly connected to the frame, the output end of the third transverse drive is fixedly connected to the welding bracket, the welding gear ring is rotatably connected to the welding bracket, the welding gear and the welding gear ring are meshed, the output shaft of the welding motor is transmission connected to the welding gear, the welding radial drive is fixedly connected to the welding gear ring, and the output end of the welding radial drive is transmission connected to the welding gun.

[0026] The beneficial effects of the present invention are as follows: the bellows welding device provided by the present invention can effectively fix the bellows through the internal fixing structure of the airbag and the fixing rod to prevent the bellows from shaking during the welding process, thereby improving the welding stability and welding quality, and can also simplify the welding operation, reduce manual intervention, and improve the welding efficiency;

[0027] Hot air in the airbag preheats the bellows, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint;

[0028] The device is suitable for welding bellows and flanges of different sizes and shapes and has strong versatility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 3 The present invention Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0033] Figure 4 It is a right side structural schematic diagram of the mounting seat of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the arrangement of the bellows and the flange of the present invention;

[0035] Figure 6 It is a right view structural schematic diagram of the bellows after the fixing rod of the present invention abuts against the bellows;

[0036] Figure 7 It is a structural schematic diagram of the welding mechanism near the contact point between the bellows and the flange after the bellows and the flange are in contact with each other;

[0037] Figure 8It is a structural schematic diagram of the arrangement of the percussion hammer near the welding point of the bellows and the flange plate of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the present invention in which a percussion hammer is arranged to percuss the welding point between the bellows and the flange;.

[0039] In the figure: 1, frame, 11, sliding cavity,

[0040] 2. Bellows fixing mechanism, 21. Mounting seat, 211. Air passage, 212. Slide groove, 213. Connecting part, 22. Air pump, 23. Heater, 24. Air bag, 241. Protrusion, 242. One-way valve, 243. Pressure relief valve, 25. Fixing rod, 251. Sliding seat, 26. Linkage assembly, 261. Sliding sleeve, 262. Connecting rod, 263. Transmission rod,

[0041] 3. flange fixing mechanism, 31. chuck, 32. first transverse driving member;

[0042] 4. welding mechanism, 41. welding bracket, 42. welding motor, 43. welding gear, 44. welding gear ring, 45. third transverse driving member, 46. welding radial driving member, 47. welding gun;

[0043] 5. stress relief device, 51. percussion hammer, 52. driving assembly, 521. ring gear, 522. sun gear, 5221. second through hole, 523. mounting frame, 5231. first through hole, 5232. slider, 524. connecting frame, 525. second lateral driving member, 526. radial driving member, 527. transmission gear, 528. motor, 529. planetary gear, 53. spring;

[0044] 6. Bellows;

[0045] 7. Flange. DETAILED DESCRIPTION

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0047] like Figure 1 Schematic diagram of the structure of the present invention, a bellows welding device, including a frame 1 and a bellows fixing mechanism 2 and a flange fixing mechanism 3 installed on the frame 1;

[0048] like Figure 1 , Figure 2As shown, the bellows fixing mechanism 2 is used to fix the bellows. The bellows fixing mechanism 2 includes a mounting seat 21, an air pump 22, a heater 23, an air bag 24 and a plurality of fixing rods 25. The mounting seat 21 is fixedly connected to the frame 1, the fixing rods 25 are slidably connected to the mounting seat 21, and the fixing rods 25 are distributed at intervals along the circumference of the mounting seat 21. Four fixing rods 25 are arranged in the present application, but the present application does not impose a specific restriction on the number thereof, and three or more fixing rods 25 can also be installed. An air passage 211 is provided at the center of the mounting seat 21, the air bag 24 is fixedly connected to the mounting seat 21, and the air bag 24 surrounds the left end port of the air passage 211, so that the air bag 24 can receive the air output by the air passage 211 and expand. The air bag 24 is used to provide power for the radial movement of the fixing rod 25 along the mounting seat 21 and to abut against the inner wall of the bellows 6. During the expansion process, the air bag 24 pushes the fixing rod 25 to move radially until the fixing rod 25 abuts against the inner wall of the bellows 6. The airbag 24 is provided with a protrusion 241 matching the bellows 6. After the airbag 24 is expanded, the protrusion 241 on the airbag 24 can fit the corrugated section on the bellows 6 to further enhance the fixation. The heater 23 is located in the airway 211. The heater 23 is used to heat the air. The heater 23 is fixedly connected to the frame 1. The output end of the air pump 22 is connected to the input end of the heater 23. The output end of the heater 23 is communicated with the airbag 24. The heater 23 and the air pump 22 are connected through an air pipe. The heater 23 and the one-way valve 242 are connected through an air pipe. The air pump 22 is fixedly connected to the frame 1. The air pump 22 is used to blow air into the airbag 24 to expand the airbag 24. The air pump 22 continuously introduces air into the airbag 24. The internal fixing structure of the airbag 24 and the fixing rod 25 can effectively fix the bellows 6 to prevent it from shaking during welding, thereby improving the stability and quality of welding, simplifying the welding operation, reducing manual intervention, and improving welding efficiency.

[0049] The hot air in the airbag 24 preheats the bellows 6, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint. In the process of fixing the bellows 6, the bellows 6 is preheated simultaneously to reduce welding stress.

[0050] The airbag 24 is provided with a one-way valve 242 and a pressure relief valve 243, both of which are located in the airway 211. Both the one-way valve 242 and the pressure relief valve 243 are solenoid-controlled valves. The input end of the one-way valve 242 is connected to the output end of the heater 23. The one-way valve 242 allows the air output by the air pump 22 to enter the airbag 24 in one direction, and the pressure relief valve 243 releases excess gas after the pressure in the airbag 24 reaches a certain pressure.

[0051] like Figure 1 , Figure 2As shown, the mounting seat 21 is provided with a radially extending slide groove 212, and the fixing rod 25 is provided with a slide seat 251 matching the slide groove 212. The slide groove 212 and the slide seat 251 correspond one to one, and the slide seat 251 is slidably arranged in the corresponding slide groove 212. The design of the slide seat 251 and the slide groove 212 can increase the stability of the fixing rod 25.

[0052] like Figure 1 , Figure 2 As shown, the bellows fixing mechanism 2 also includes a linkage assembly 26, which is used to connect the fixing rod 25 so that the fixing rod 25 moves radially synchronously. The linkage assembly 26 includes a sliding sleeve 261, a plurality of connecting rods 262 and a plurality of transmission rods 263. The connecting rods 262 correspond to the slide seats 251 one by one. The connecting rods 262 are fixedly connected to the corresponding slide seats 251. A connecting portion 213 is protruded on the right end surface of the mounting seat 21. The connecting portion 213 surrounds the airway 211. The sliding sleeve 261 and the connecting portion 213 slide Dynamic connection, the transmission rod 263 and the connecting rod 262 correspond one to one, one end of the transmission rod 263 is rotationally connected to the corresponding connecting rod 262, and the other end is rotationally connected to the sliding sleeve 261, and the linkage assembly 26 connects all the fixed rods 25 so that the fixed rods 25 can move synchronously. On the one hand, the fixed rods 25 can synchronously contact the inner wall surface of the bellows 6, and on the other hand, the positioning of the bellows 6 can be achieved, so that after the bellows 6 is fixed, the central axis of the bellows 6 is coaxial with the central axis of the chuck 31 of the flange fixing mechanism 3.

[0053] During the radial outward movement of the fixed rod 25, the slide 251 also moves radially outward, and the slide 251 drives the connecting rod 262 to move. The connecting rod 262 drives the sliding sleeve 261 to slide on the connecting portion 213 through the transmission rod 263. Since the transmission rod 263 is connected to the sliding sleeve 261, the fixed rod 25 moves synchronously.

[0054] like Figure 1 As shown, the flange fixing mechanism 3 is used to fix the flange 7; the flange fixing mechanism 3 includes a chuck 31 and a first transverse driving member 32, the chuck 31 can be a three-jaw chuck, the clamping surface of the chuck 31 is located on the left end surface of the chuck 31, the chuck 31 is used to clamp the flange, the first transverse driving member 32 is used to provide power for the flange 7 on the chuck 31 to approach or move away from the bellows 6, the first transverse driving member 32 is fixedly connected to the frame 1, the output end of the first transverse driving member 32 is fixedly connected to the chuck 31, the first transverse driving member 32 can be a power device such as a cylinder, a hydraulic cylinder, a screw transmission mechanism, etc., the first transverse driving member 32 drives the flange 7 on the chuck 31 to approach the end of the bellows 6 and makes the flange 7 and the bellows 6 contact, which is convenient for subsequent welding.

[0055] like Figure 1 , Figure 3As shown, the welding fixture also includes a stress relief device 5 arranged on the frame 1, and the stress relief device 5 includes a striking hammer 51 and a driving assembly 52. ​​The striking hammer 51 is used to strike the welding point between the bellows 6 and the flange 7, and the driving assembly 52 is used to provide power for the circumferential rotation of the striking hammer 51 and for the striking hammer 51 to strike the welding point between the bellows 6 and the flange 7. The striking hammer 51 is arranged at an angle so that it can more easily contact the welding point between the bellows 6 and the flange 7.

[0056] The driving assembly 52 includes a ring gear 521, a sun gear 522, a mounting frame 523, a connecting frame 524, a second transverse driving member 525, a radial driving member 526, a transmission gear 527, a motor 528 and a planetary gear 529;

[0057] The second transverse driving member 525 is used to provide power for the transverse movement of the striking hammer 51. The second transverse driving member 525 is fixedly connected to the frame 1. The output end of the second transverse driving member 525 is fixedly connected to the mounting frame 523. The second transverse driving member 525 can be a power device such as a cylinder, a hydraulic cylinder, a screw transmission mechanism, etc.

[0058] The mounting frame 523 is provided with a first through hole 5231 for the flange fixing mechanism 3 to pass through, and the sun gear 522 is fixedly connected to the mounting frame 523, and the sun gear 522 plays a role of limiting and guiding;

[0059] The sun gear 522 is provided with a second through hole 5221 for the flange 7 fixing mechanism 3 to pass through. The first through hole 5231 and the second through hole 5221 enable the flange fixing mechanism 3 to move laterally to avoid interference with its operation.

[0060] The inner ring and the outer ring of the gear ring 521 are provided with teeth, and the gear ring 521 is rotatably connected to the mounting frame 523;

[0061] The planetary gear 529 is meshed with the sun gear 522, and the planetary gear 529 is meshed with the inner ring of the gear ring 521, the planetary gear 529 is rotatably connected with the connecting frame 524, and the connecting frame 524 is rotatably connected with the mounting frame 523;

[0062] The transmission gear 527 is meshed with the outer ring of the gear ring 521, and the output shaft of the motor 528 is in transmission connection with the transmission gear 527. The motor 528 is used to provide power for the circumferential rotation of the planetary gear 529 around the sun gear 529 and the self-rotation;

[0063] The radial driving member 526 and the transmission gear 527 are fixedly connected, and the percussion hammer 51 is arranged on the output end of the radial driving member 526. The radial driving member 526 is used to provide power for the radial movement of the percussion hammer 51. The radial driving member 526 can be a power device such as a cylinder, a hydraulic cylinder, a screw transmission mechanism, etc.

[0064] The striking hammer 51 and the radial driving member 526 are elastically connected, and a spring 53 is arranged between the striking hammer 51 and the output end of the radial driving member 526, so that the striking hammer 51 can elastically retract after the striking is completed to prevent the striking hammer 51 from getting stuck.

[0065] A sliding cavity 11 is provided on the frame 1, and a slider 5232 matching the sliding cavity 11 is arranged on the mounting frame 523. The slider 5232 and the sliding cavity 11 are slidably connected. The design of the sliding cavity 11 and the slider 5232 can make the stress relief device 5 move stably.

[0066] The welding mechanism 4 is used for welding the bellows and the flange. The welding mechanism 4 includes a welding bracket 41, a welding motor 42, a welding gear 43, a welding gear ring 44, a third transverse drive 45, a welding radial drive 46 and a welding gun 47. The welding bracket 41 is slidably connected to the frame 1. The welding bracket 41 has a welding slider matching the sliding cavity 11. The welding slider is slidably connected to the sliding cavity 11. The third transverse drive 45 is fixedly connected to the frame 1. The third transverse drive 45 can be a power device such as a cylinder, a hydraulic cylinder, a screw transmission mechanism, etc. The output end of the third transverse drive 45 It is fixedly connected to the welding bracket 41, and the third lateral drive member 45 is used to provide power for the lateral movement of the welding gun 47. The welding ring gear 44 is rotatably connected to the welding bracket 41, the welding gear 43 is meshed with the welding ring gear 44, and the output shaft of the welding motor 42 is transmission connected to the welding gear 43. The welding radial drive member 46 is fixedly connected to the welding ring gear 44, and the output end of the welding radial drive member 46 is transmission connected to the welding gun 47. The welding radial drive member 46 can be a power device such as a cylinder, a hydraulic cylinder, a screw transmission mechanism, etc. The welding radial drive member 46 is used to provide power for the radial movement of the welding gun 47.

[0067] In the initial state, the slide seat 251 on the fixing rod 25 is located at one end of the slide groove 212 close to the air passage 211 , and at this time, the diameter of the circle where the fixing rod 25 is located is smaller than the diameter of the bellows 6 .

[0068] When fixing the bellows 6, the bellows 6 is sleeved on the airbag 24 and its fixing rod 25 (such as Figure 5 As shown in the figure, the heater 23 starts to heat the air, the air pump 22 starts to make the air flow, and the air pump 22 blows the air into the airbag 24. After the hot air is blown into the airbag 24, the airbag 24 expands and drives the fixed rod 25 to move radially outward. Due to the existence of the linkage assembly 26, the fixed rod 25 moves synchronously, and the slide groove 212 guides the fixed rod 25. The slide seat 251 moves along the slide groove 212. During the expansion process of the airbag 24, since hot air is blown in, the bellows 6 can be preheated synchronously. The airbag 24 continues to expand until the fixed rods 25 are against the inner wall of the bellows 6 (as shown in the figure). Figure 6As shown), the protrusion 241 on the airbag 24 is embedded in the corrugated section of the bellows 6 to fix the bellows 6 (as shown Figure 5 As shown), the synchronous movement of the fixing rod 25 can also realize the positioning of the bellows 6, so that the central axis of the bellows 6 and the central axis of the chuck 31 are coaxial.

[0069] When fixing the flange 7, the flange 7 is clamped by the chuck 31. After the flange 7 is clamped, the central axis of the flange 7 is coaxial with the central axis of the chuck 31, that is, the central axis of the flange 7 is coaxial with the central axis of the bellows 6. The first transverse driving member 32 is started to drive the flange 7 close to the bellows 6 until it contacts the bellows 6. The contact point between the bellows 6 and the flange 7 is a welding point, and the contact point has a circular structure. At this time, welding can begin.

[0070] When the welding mechanism 4 is welding and the flange fixing mechanism 3 passes through the stress relief device 5, the angle of the striking hammer 51 can be adjusted by the rotation of the planetary gear 529, so that the striking hammer 51 is in an avoidance state (such as Figure 7 As shown), thereby avoiding affecting the lateral movement of the flange fixing mechanism 3 and the circumferential rotation and radial movement of the welding gun 47 of the welding mechanism 4

[0071] During welding, the third transverse driving member 45 is started to drive the welding gear ring 44 to move transversely through the welding bracket 41, and the welding gear ring 44 drives the welding gun 47 to move transversely through the welding radial driving member 46 until the welding gun 47 moves to the upper part of the contact point between the bellows 6 and the flange 7 or to the radial path of the contact point between the bellows 6 and the flange 7 (such as Figure 7 As shown), the welding radial drive 46 is started to make the welding gun 47 approach the contact point of the bellows 6 and the flange 7 until it reaches a suitable welding distance, and welding begins. The welding motor 42 is started to drive the welding gear 43 to rotate, and the welding gear 43 drives the welding gear ring 44 to rotate. The welding gear ring 44 drives the welding gun 47 to rotate circumferentially through the welding radial drive 46, thereby realizing circumferential welding of the contact point of the bellows 6 and the flange 7. After welding is completed, the welding gun 47 is removed.

[0072] When striking to reduce stress, the second lateral driving member 525 causes the striking hammer 51 to move laterally close to the welding point between the bellows 6 and the flange 7 (eg Figure 8 As shown), until the hammer 51 and the weld are in the same plane, the radial drive member 26 starts to drive the hammer 51 to move radially close to the weld until the hammer 51 can contact the weld (as shown in FIG. Fig. 9As shown), at this time, the motor 528 starts to drive the transmission gear 527 to rotate, the transmission gear 527 drives the ring gear 521 to transmit, the ring gear 521 drives the planetary gear 529 to rotate, and due to the restrictions of the sun gear 522 and the connecting frame 524, the planetary gear 529 completes its own rotation during the circumferential rotation around the sun gear 522, and the planetary gear 529 thereby drives the circumferential rotation of the knocking hammer 51 and the self-rotation of the knocking hammer 51. When the knocking hammer 51 rotates, the welding point is knocked, and the circumferential rotation of the knocking hammer 51 realizes circumferential knocking around the welding point.

[0073] During the striking, after striking the weld, the striking hammer 51 will retract close to the radial driving member 526 , so that the striking hammer 51 can pass over the weld for the next striking, thereby preventing the striking hammer 51 from getting stuck.

[0074] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bellows welding device, characterized in that: It comprises a frame (1), and a bellows fixing mechanism (2), a flange fixing mechanism (3) and a welding mechanism (4) installed on the frame (1); The bellows fixing mechanism (2) is used to fix the bellows, and comprises a mounting seat (21), an air pump (22), a heater (23), an air bag (24), and a plurality of fixing rods (25). The mounting seat (21) is fixedly connected to the frame (1), the fixing rods (25) are slidably connected to the mounting seat (21), the fixing rods (25) are distributed at intervals along the circumference of the mounting seat (21), an air passage (211) is provided at the center of the mounting seat (21), and the air bag (24) and the mounting seat (21) are connected to the mounting seat (21). ) are fixedly connected, and the airbag (24) surrounds the left end port of the ventilation channel (211), the airbag (24) is used to provide power for the radial movement of the fixing rod (25) along the mounting seat (21) and to abut against the inner wall of the bellows, the heater (23) is used to heat the air, the output end of the air pump (22) is connected to the input end of the heater (23), the output end of the heater (23) is connected to the airbag (24), and the air pump (22) is used to blow air into the airbag (24) to expand the airbag (24); The flange fixing mechanism (3) is used to fix the flange; The welding mechanism (4) is used for welding the bellows and the flange.

2. A bellows welding device as claimed in claim 1, characterized in that: The mounting seat (21) is provided with a sliding groove (212) extending in the radial direction, and the fixing rod (25) is provided with a sliding seat (251) matching the sliding groove (212). The sliding groove (212) and the sliding seat (251) correspond to each other one by one, and the sliding seat (251) is slidably arranged in the corresponding sliding groove (212).

3. A bellows welding device as claimed in claim 2, characterized in that: The bellows fixing mechanism (2) further comprises a linkage assembly (26), wherein the linkage assembly (26) is used to connect the fixing rod (25) so that the fixing rod (25) moves radially synchronously, the linkage assembly (26) comprises a sliding sleeve (261), a plurality of connecting rods (262) and a plurality of transmission rods (263), wherein the connecting rods (262) correspond to the sliding seat (251) one by one, the connecting rods (262) are fixedly connected to the corresponding sliding seat (251), a connecting portion (213) is protruded on the upper right end surface of the mounting seat (21), the connecting portion (213) surrounds the air passage (211), the sliding sleeve (261) is slidably connected to the connecting portion (213), the transmission rod (263) corresponds to the connecting rod (262) one by one, one end of the transmission rod (263) is rotationally connected to the corresponding connecting rod (262), and the other end is rotationally connected to the sliding sleeve (261).

4. A bellows welding device as claimed in claim 1, characterized in that: The flange fixing mechanism (3) comprises a chuck (31) and a first transverse driving member (32), wherein the chuck (31) is used for clamping the flange, and the first transverse driving member (32) is used for providing power for the flange on the chuck (31) to move closer to or farther from the bellows, the first transverse driving member (32) is fixedly connected to the frame (1), and the output end of the first transverse driving member (32) is fixedly connected to the chuck (31).

5. A bellows welding device as claimed in claim 1, characterized in that: The welding fixture also includes a stress relief device (5) arranged on the frame (1), the stress relief device (5) including a striking hammer (51) and a driving assembly (52), the striking hammer (51) being used to strike the welding point between the bellows and the flange, and the driving assembly (52) being used to provide power for the circumferential rotation of the striking hammer (51) and for the striking hammer (51) to strike the welding point between the bellows and the flange.

6. A bellows welding device as claimed in claim 5, characterized in that: The driving assembly (52) comprises a ring gear (521), a sun gear (522), a mounting frame (523), a connecting frame (524), a second transverse driving member (525), a radial driving member (526), ​​a transmission gear (527), a motor (528) and a planetary gear (529); The second transverse driving member (525) is used to provide power for the transverse movement of the striking hammer (51), the second transverse driving member (525) is fixedly connected to the frame (1), and the output end of the second transverse driving member (525) is fixedly connected to the mounting frame (523); The mounting frame (523) is provided with a first through hole (5231) for the flange fixing mechanism (3) to pass through, the sun gear (522) and the mounting frame (523) are fixedly connected, and the sun gear (522) is provided with a second through hole (5221) for the flange fixing mechanism (3) to pass through; The inner ring and the outer ring of the gear ring (521) are both provided with teeth, and the gear ring (521) is rotatably connected to the mounting frame (523); The planetary gear (529) is meshed with the sun gear (522), and the planetary gear (529) is meshed with the inner ring of the ring gear (521), the planetary gear (529) is rotationally connected to the connecting frame (524), and the connecting frame (524) is rotationally connected to the mounting frame (523); The transmission gear (527) is meshed with the outer ring of the gear ring (521), and the output shaft of the motor (528) is transmission-connected with the transmission gear (527); The radial driving member (526) and the transmission gear (527) are fixedly connected, the striking hammer (51) is arranged on the output end of the radial driving member (526), ​​and the radial driving member (526) is used to provide power for the radial movement of the striking hammer (51).

7. A bellows welding device as claimed in claim 6, characterized in that: The knocking hammer (51) and the radial driving member (526) are elastically connected, and a spring (53) is arranged between the knocking hammer (51) and the output end of the radial driving member (526).

8. A bellows welding device as claimed in claim 6, characterized in that: The frame (1) is provided with a sliding cavity (11), and a sliding block (5232) matching the sliding cavity (11) is arranged on the mounting frame (523), and the sliding block (5232) and the sliding cavity (11) are slidably connected.

9. A bellows welding device as claimed in claim 1, characterized in that: The airbag (24) is provided with a protrusion (241) matching the bellows, and the airbag (24) is provided with a one-way valve (242) and a pressure relief valve (243), and the input end of the one-way valve (242) is connected to the output end of the heater (23).

10. A bellows welding device as claimed in claim 1, characterized in that: The welding mechanism (4) comprises a welding bracket (41), a welding motor (42), a welding gear (43), a welding gear ring (44), a third transverse driving member (45), a welding radial driving member (46) and a welding gun (47); the welding bracket (41) is slidably connected to the frame (1); the third transverse driving member (45) is fixedly connected to the frame (1); the output end of the third transverse driving member (45) is fixedly connected to the welding bracket (41); the welding gear ring (44) is rotatably connected to the welding bracket (41); the welding gear (43) is meshed with the welding gear ring (44); the output shaft of the welding motor (42) is transmission-connected to the welding gear (43); the welding radial driving member (46) is fixedly connected to the welding gear ring (44); and the output end of the welding radial driving member (46) is transmission-connected to the welding gun (47).

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