Seam welder

Abstract

The utility model relates to the technical field of welding equipment, in particular to a seam welder. Comprising a machine table, a lower axle box, a lower rotating shaft, a lower welding wheel, a lifting driving mechanism, an upper axle box, an upper rotating shaft, an upper welding wheel, a lower polishing mechanism and a lower finishing mechanism, the upper grinding mechanism and the upper finishing mechanism are arranged on the outer side wall of the upper shaft box, the upper rotation driving mechanism and the lower rotation driving mechanism are arranged on the machine table, the upper rotation driving mechanism is used for driving the upper rotating shaft to rotate, and the lower rotation driving mechanism is used for driving the lower rotating shaft to rotate. The lower grinding mechanism and the lower finishing mechanism are used for grinding and contour finishing of the lower welding wheel correspondingly, the upper grinding mechanism and the upper finishing mechanism are used for grinding and contour finishing of the upper welding wheel correspondingly, and the lifting driving mechanism is used for driving the upper welding wheel to be close to or away from the lower welding wheel. The welding wheel polishing device can polish the welding wheel and trim the outline of the welding wheel, is convenient and fast to maintain, and ensures the quality of the welding wheel, so that the seam welding quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a seam welding machine. Background Art

[0002] Seam welding machine refers to a resistance welding machine in which the weldments are assembled into lap joints or butt joints and placed between two roller electrodes. The roller electrodes pressurize the weldments and rotate, and continuously or intermittently pulse power to form a continuous weld. Among the existing patents, the applicant applied for a Chinese patent document with application number 200520061669.8 on July 25, 2005, which discloses an oil-filled furnace radiator contour seam welding machine, including a main machine and a control box fixed to the right side of the main machine, upper and lower welding heads arranged at the front of the main machine, a drive motor arranged at the top of the main machine, a lifting cylinder connected to the upper welding head, a differential device transmission-connected to the drive motor is provided at the top of the main machine, the left output shaft of the differential device is connected to one end of the left drive shaft through a universal coupling, the other end of the left drive shaft is connected to the transmission device of the upper welding head through a universal coupling, the right output shaft of the differential device is connected to one end of the right drive shaft through a universal coupling, the other end of the right drive shaft is connected to the transmission device of the lower welding head through a universal coupling, and a contouring device is installed on the left and right brackets at the front of the main machine, and the contouring device moves under the drive of the upper and lower welding wheels of the upper and lower welding heads. The upper welding wheel and the lower welding wheel of the patent document need to be disassembled for maintenance, which is inconvenient to maintain and requires frequent disassembly and assembly of the welding wheels. Therefore, the defect is very obvious, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a seam welding machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A seam welding machine comprises a machine platform, a lower shaft box installed on the machine platform, a lower rotating shaft rotatably connected to the lower shaft box, a lower welding wheel installed on the lower rotating shaft, a lifting drive mechanism installed on the machine platform, an upper shaft box installed on the lifting end of the lifting drive mechanism and located above the lower shaft box, an upper rotating shaft rotatably connected to the upper shaft box, an upper welding wheel installed on the upper rotating shaft and arranged opposite to the lower welding wheel, a lower grinding mechanism and a lower trimming mechanism respectively arranged on the outer side wall of the lower shaft box, an upper grinding mechanism and an upper trimming mechanism respectively arranged on the outer side wall of the upper shaft box, and an upper rotating drive mechanism and a lower rotating drive mechanism respectively arranged on the machine platform, the upper rotating drive mechanism is used to drive the upper rotating shaft to rotate, the lower rotating drive mechanism is used to drive the lower rotating shaft to rotate, the lower grinding mechanism and the lower trimming mechanism are respectively used to grind and contour trim the lower welding wheel, the upper grinding mechanism and the upper trimming mechanism are respectively used to grind and contour trim the upper welding wheel, and the lifting drive mechanism is used to drive the upper welding wheel to approach or move away from the lower welding wheel.

[0006] Furthermore, the upper grinding mechanism and / or the lower grinding mechanism include a grinding seat mounted on the outer wall of the upper bearing box or the outer wall of the lower bearing box, a grinding cylinder mounted on the grinding seat, a moving block mounted on the piston rod of the grinding cylinder, a grinding motor mounted on the moving block, and a grinding wheel mounted on the output shaft of the grinding motor. The grinding cylinder is used to drive the moving block to approach or move away from the upper welding wheel or the lower welding wheel, and the grinding wheel is used to grind the upper welding wheel or the lower welding wheel.

[0007] Furthermore, the upper trimming mechanism and / or the lower trimming mechanism include a trimming seat mounted on the outer wall of the upper axle box or the outer wall of the lower axle box, a trimming cylinder mounted on the trimming seat, and a trimming block mounted on the piston rod of the trimming cylinder, the trimming block is used to trim the contour of the upper welding wheel or the lower welding wheel, and the trimming cylinder is used to drive the trimming block to move closer to or away from the upper welding wheel or the lower welding wheel.

[0008] Furthermore, a trimming groove is concavely provided on the trimming surface of the trimming block.

[0009] Furthermore, the outer side wall of the upper axle box and / or the outer side wall of the lower axle box is provided with a welding wheel wear monitoring mechanism, and the welding wheel wear monitoring mechanism is used to monitor the wear amount of the upper welding wheel and / or the lower welding wheel.

[0010] Furthermore, the welding wheel wear monitoring mechanism includes a monitoring seat installed on the outer wall of the upper axle box or the outer wall of the lower axle box, a monitoring cylinder installed on the monitoring seat, a wheel seat installed on the piston rod of the monitoring cylinder, a monitoring wheel rotatably connected to the wheel seat and a displacement sensor installed on the monitoring seat, the wheel seat is provided with a sensing block, the displacement sensor is used to detect the displacement of the sensing block, and the monitoring wheel rolls against the contour of the upper welding wheel or the contour of the lower welding wheel.

[0011] Furthermore, the machine table or the lower axle box is equipped with a cooling liquid spraying mechanism.

[0012] Furthermore, the machine is equipped with a coolant recovery pool, and the lower welding wheel is located in the coolant recovery pool.

[0013] Furthermore, silver-inlaid brushes are provided in the upper shaft box and the lower shaft box, the silver-inlaid brushes are electrically connected to the conductive parts, the silver-inlaid brushes are rotationally connected to the upper rotating shaft or the lower rotating shaft, and are used to supply power to the upper rotating shaft or the lower rotating shaft.

[0014] Furthermore, the upper rotation drive mechanism and / or the lower rotation drive mechanism include a rotating motor installed on the machine, a cross-axis universal joint connected to the output shaft of the rotating motor, a fixed seat installed on the outer wall of the upper axle box or the lower axle box, a shaft rotatably connected to the fixed seat, a first bevel gear set transmission-connected to one end of the shaft and one end of the cross-axis universal joint, and a second bevel gear set transmission-connected to the other end of the shaft and the upper rotating shaft or the lower rotating shaft.

[0015] The beneficial effects of the utility model are as follows: in actual application, the workpiece is placed between the upper welding wheel and the lower welding wheel, and the bottom surface of the welding part of the workpiece contacts the lower welding wheel, and then the lifting drive mechanism drives the upper welding wheel to move down close to the welding part of the workpiece, and presses the welding part of the workpiece onto the lower welding wheel, and as the workpiece moves, the upper welding wheel and the lower welding wheel that are powered on and heated respectively roll on the workpiece, and the rolling upper welding wheel and the lower welding wheel cooperate to weld the workpiece. When the upper welding wheel needs to be maintained, the upper rotating drive mechanism drives the upper rotating shaft to drive the upper welding wheel to rotate, the grinding end of the upper grinding mechanism contacts the welding surface of the upper welding wheel, the trimming end of the upper trimming mechanism contacts the welding surface of the upper welding wheel, and as the upper welding wheel rotates, the upper grinding mechanism grinds the upper welding wheel, and the upper trimming mechanism performs contour trimming on the upper welding wheel; when the lower welding wheel needs to be maintained, the lower rotating drive mechanism drives the lower rotating shaft to drive the lower welding wheel to rotate, the grinding end of the lower grinding mechanism contacts the welding surface of the lower welding wheel, the trimming end of the lower trimming mechanism contacts the welding surface of the lower welding wheel, and as the lower welding wheel rotates, the lower grinding mechanism grinds the lower welding wheel, and the lower trimming mechanism performs contour trimming on the lower welding wheel. The utility model can grind and trim the contour of the welding wheel, is convenient to maintain, and ensures the quality of the welding wheel, thereby ensuring the quality of the seam welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a partial cross-sectional view of the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the upper grinding mechanism or the lower grinding mechanism of the utility model.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the upper trimming mechanism or the lower trimming mechanism of the utility model.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the welding wheel wear monitoring mechanism of the utility model.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the upper rotating drive mechanism and the upper rotating shaft or the lower rotating drive mechanism and the lower rotating shaft of the utility model.

[0022] Description of reference numerals:

[0023] 1. Machine table; 2. Lower axle box; 3. Lower rotating shaft; 4. Lower welding wheel; 5. Lifting drive mechanism; 6. Upper axle box; 7. Upper rotating shaft; 8. Upper welding wheel; 9. Lower grinding mechanism; 10. Lower trimming mechanism; 11. Upper grinding mechanism; 12. Upper trimming mechanism; 13. Upper rotating drive mechanism; 14. Lower rotating drive mechanism; 15. Grinding seat; 16. Grinding cylinder; 17. Moving block; 18. Grinding motor; 19. Grinding wheel; 20. Trimming seat; 21. Dressing cylinder; 22. Dressing block; 23. Dressing groove; 24. Welding wheel wear monitoring mechanism; 25. Monitoring seat; 26. Monitoring cylinder; 27. Wheel seat; 28. Monitoring wheel; 29. ​​Displacement sensor; 30. Induction block; 31. Coolant recovery tank; 32. Silver-inlaid brush; 33. Conductive part; 34. Rotating motor; 35. Cross-axis universal coupling; 36. Fixed seat; 37. Second bevel gear set; 38. Circulating cooling channel. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0025] like Figures 1 to 6 As shown, the utility model provides a seam welding machine, which includes a machine table 1, a lower shaft box 2 installed on the machine table 1, a lower rotating shaft 3 rotatably connected to the lower shaft box 2, a lower welding wheel 4 installed on the lower rotating shaft 3, a lifting drive mechanism 5 installed on the machine table 1, an upper shaft box 6 installed at the lifting end of the lifting drive mechanism 5 and located above the lower shaft box 2, an upper rotating shaft 7 rotatably connected to the upper shaft box 6, an upper welding wheel 8 installed on the upper rotating shaft 7 and arranged opposite to the lower welding wheel 4, a lower grinding mechanism 9 and a lower finishing mechanism 10 respectively arranged on the outer side wall of the lower shaft box 2, and a lower grinding mechanism 9 and a lower finishing mechanism 10 respectively arranged on the upper shaft The upper grinding mechanism 11 and the upper trimming mechanism 12 on the outer wall of the box 6 and the upper rotating drive mechanism 13 and the lower rotating drive mechanism 14 are respectively arranged on the machine 1, the upper rotating drive mechanism 13 is used to drive the upper rotating shaft 7 to rotate, the lower rotating drive mechanism 14 is used to drive the lower rotating shaft 3 to rotate, the lower grinding mechanism 9 and the lower trimming mechanism 10 are respectively used to grind and contour trim the lower welding wheel 4, the upper grinding mechanism 11 and the upper trimming mechanism 12 are respectively used to grind and contour trim the upper welding wheel 8, and the lifting drive mechanism 5 is used to drive the upper welding wheel 8 to approach or move away from the lower welding wheel 4.

[0026] In actual application, the workpiece is placed between the upper welding wheel 8 and the lower welding wheel 4, and the bottom surface of the welding part of the workpiece is in contact with the lower welding wheel 4. Then the lifting drive mechanism 5 drives the upper welding wheel 8 to move down close to the welding part of the workpiece, and presses the welding part of the workpiece against the lower welding wheel 4. As the workpiece moves, the upper welding wheel 8 and the lower welding wheel 4 after power-on heating roll on the workpiece respectively, and the rolling upper welding wheel 8 and the lower welding wheel 4 cooperate to weld the workpiece. When the upper welding wheel 8 needs to be maintained, the upper rotating drive mechanism 13 drives the upper rotating shaft 7 to drive the upper welding wheel 8 to rotate, the grinding end of the upper grinding mechanism 11 conflicts with the welding surface of the upper welding wheel 8, and the trimming end of the upper trimming mechanism 12 conflicts with the welding surface of the upper welding wheel 8. As the upper welding wheel 8 rotates, the upper grinding mechanism 11 grinds the upper welding wheel 8, and the upper trimming mechanism 12 performs contour trimming on the upper welding wheel 8; when the lower welding wheel 4 needs to be maintained, the lower rotating drive mechanism 14 drives the lower rotating shaft 3 to drive the lower welding wheel 4 to rotate, the grinding end of the lower grinding mechanism 9 conflicts with the welding surface of the lower welding wheel 4, and the trimming end of the lower trimming mechanism 10 conflicts with the welding surface of the lower welding wheel 4. As the lower welding wheel 4 rotates, the lower grinding mechanism 9 grinds the lower welding wheel 4, and the lower trimming mechanism 10 performs contour trimming on the lower welding wheel 4. The utility model can grind and trim the contour of the welding wheel, is convenient for maintenance, ensures the quality of the welding wheel, and thus ensures the quality of the seam welding.

[0027] In this embodiment, the upper grinding mechanism 11 and / or the lower grinding mechanism 9 include a grinding seat 15 installed on the outer wall of the upper bearing box 6 or the outer wall of the lower bearing box 2, a grinding cylinder 16 installed on the grinding seat 15, a moving block 17 installed on the piston rod of the grinding cylinder 16, a grinding motor 18 installed on the moving block 17 and a grinding wheel 19 installed on the output shaft of the grinding motor 18. The grinding cylinder 16 is used to drive the moving block 17 to approach or move away from the upper welding wheel 8 or the lower welding wheel 4, and the grinding wheel 19 is used to grind the upper welding wheel 8 or the lower welding wheel 4.

[0028] In practical applications, when the welding wheel (upper welding wheel 8 or lower welding wheel 4) needs to be polished, the polishing cylinder 16 drives the moving block 17 to move the polishing motor 18 and the polishing wheel 19 close to the welding surface of the welding wheel until the polishing wheel 19 contacts the welding surface of the welding wheel, and the polishing motor 18 drives the polishing wheel 19 to rotate, and the rotating polishing wheel 19 contacts the rotating welding wheel in rolling manner to polish the welding wheel. Specifically, the rotation direction of the polishing wheel 19 is opposite to that of the welding wheel, and there is a speed difference between the rotation speed of the polishing wheel 19 and the rotation speed of the welding wheel.

[0029] In this embodiment, the upper trimming mechanism 12 and / or the lower trimming mechanism 10 include a trimming seat 20 installed on the outer wall of the upper bearing box 6 or the outer wall of the lower bearing box 2, a trimming cylinder 21 installed on the trimming seat 20, and a trimming block 22 of the piston rod installed on the trimming cylinder 21. The trimming block 22 is used to trim the contour of the upper welding wheel 8 or the lower welding wheel 4. The trimming cylinder 21 is used to drive the trimming block 22 to move closer to or away from the upper welding wheel 8 or the lower welding wheel 4. The trimming surface of the trimming block 22 is concavely provided with a trimming groove 23.

[0030] In actual application, when it is necessary to grind the contour of the welding wheel (upper welding wheel 8 or lower welding wheel 4), the trimming cylinder 21 drives the trimming block 22 to move close to the welding surface of the welding wheel until the inner wall of the trimming groove 23 conflicts with the contour of the welding wheel. As the welding wheel rotates, the trimming block 22 trims the contour of the welding wheel.

[0031] In this embodiment, a welding wheel wear monitoring mechanism 24 is provided on the outer side wall of the upper axle box 6 or / and the outer side wall of the lower axle box 2. The welding wheel wear monitoring mechanism 24 is used to monitor the wear of the upper welding wheel 8 or / and the lower welding wheel 4. The welding wheel wear monitoring mechanism 24 is electrically connected to the lifting drive mechanism 5. In practical applications, when the upper welding wheel 8 and the lower welding wheel 4 perform seam welding on the workpiece, the welding wheel wear monitoring mechanism 24 continuously monitors the wear of the welding wheel in real time, and feeds back a signal to the lifting drive mechanism 5, so that the lifting drive mechanism 5 can perform height compensation according to the monitored wear, further improving the quality of the seam welding.

[0032] In this embodiment, the welding wheel wear monitoring mechanism 24 includes a monitoring seat 25 installed on the outer wall of the upper shaft box 6 or the outer wall of the lower shaft box 2, a monitoring cylinder 26 installed on the monitoring seat 25, a wheel seat 27 of a piston rod installed on the monitoring cylinder 26, a monitoring wheel 28 rotatably connected to the wheel seat 27, and a displacement sensor 29 installed on the monitoring seat 25. The wheel seat 27 is provided with a sensing block 30. The displacement sensor 29 is used to detect the displacement of the sensing block 30. The monitoring wheel 28 rolls against the contour of the upper welding wheel 8 or the contour of the lower welding wheel 4. In actual application, under the drive of the monitoring cylinder 26, the monitoring wheel 28 continuously rolls against the welding surface of the welding wheel. When the welding wheel is worn, the sensing block 30 on the wheel seat 27 will be displaced. The displacement sensor 29 detects the displacement of the sensing block 30, and converts the displacement into the diameter change (wear amount) of the welding wheel and then feeds it back to the lifting drive mechanism 5, so that the lifting drive mechanism 5 can perform corresponding height compensation according to the wear amount.

[0033] In this embodiment, the machine table 1 or the lower shaft box 2 is equipped with a cooling liquid spraying mechanism. When the upper welding wheel 8 cooperates with the lower welding wheel 4 to weld the workpiece, the cooling liquid spraying mechanism supplies cooling liquid to the welding part of the workpiece and the welding wheel to prevent the welding wheel from being overheated and damaged. Specifically, the cooling liquid spraying mechanism includes a ball valve and a liquid spraying pipe.

[0034] In this embodiment, the machine 1 is equipped with a cooling liquid recovery pool 31, and the lower welding wheel 4 is located in the cooling liquid recovery pool 31. The cooling liquid recovery pool 31 collects the cooling liquid.

[0035] Specifically, the coolant recovery pool 31 is provided with a filter screen, and the filter screen is located below the lower welding wheel 4. The filter screen filters impurities such as welding slag in the coolant and debris generated by the welding wheel.

[0036] In this embodiment, a silver-inlaid brush 32 is provided in both the upper shaft box 6 and the lower shaft box 2. The silver-inlaid brush 32 is electrically connected to a conductive member 33. The silver-inlaid brush 32 is rotatably connected to the upper rotating shaft 7 or the lower rotating shaft 3 and is used to supply power to the upper rotating shaft 7 or the lower rotating shaft 3. In actual application, after the conductive member 33 is energized, the silver-inlaid brush 32 supplies power to the upper welding wheel 8 via the upper rotating shaft 7, causing the upper welding wheel 8 to heat up, and the silver-inlaid brush 32 supplies power to the lower welding wheel 4 via the lower rotating shaft 3, causing the lower welding wheel 4 to heat up.

[0037] Preferably, the upper shaft box 6 and the lower axis are both insulating boxes.

[0038] Specifically, a circulating cooling channel 38 is provided in both the upper rotating shaft 7 and the lower rotating shaft 3 . During the welding process, a coolant is introduced into the circulating cooling channel 38 to cool down the upper rotating shaft 7 and the lower rotating shaft 3 .

[0039] In this embodiment, the upper rotation drive mechanism 13 or / and the lower rotation drive mechanism 14 include a rotating motor 34 installed on the machine 1, a cross-axis universal joint 35 connected to the output shaft of the rotating motor 34, a fixing seat 36 installed on the outer wall of the upper shaft box 6 or the lower shaft box 2, a shaft rotatably connected to the fixing seat 36, a first bevel gear set transmission-connected to one end of the shaft and one end of the cross-axis universal joint 35, and a second bevel gear set 37 transmission-connected to the other end of the shaft and the upper rotating shaft 7 or the lower rotating shaft 3. When the welding wheel needs to be maintained, the rotating motor 34 drives the cross-axis universal joint 35 to rotate, and the rotating cross-axis universal joint 35 drives the shaft to rotate through the first bevel gear set, and the rotating shaft drives the upper rotating shaft 7 or the lower rotating shaft 3 to rotate through the second bevel gear set 37. The setting of the cross-axis universal joint 35 enables the normal lifting and lowering of the upper welding wheel 8 to be not affected while being able to drive the upper rotating shaft 7 or the lower rotating shaft 3 to rotate.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A seam welding machine, characterized in that: The machine comprises a machine platform (1), a lower shaft box (2) mounted on the machine platform (1), a lower rotating shaft (3) rotatably connected to the lower shaft box (2), a lower welding wheel (4) mounted on the lower rotating shaft (3), a lifting drive mechanism (5) mounted on the machine platform (1), an upper shaft box (6) mounted on the lifting end of the lifting drive mechanism (5) and located above the lower shaft box (2), an upper rotating shaft (7) rotatably connected to the upper shaft box (6), an upper welding wheel (8) mounted on the upper rotating shaft (7) and arranged opposite to the lower welding wheel (4), a lower grinding mechanism (9) and a lower finishing mechanism (10) respectively arranged on the outer side wall of the lower shaft box (2), and a lower grinding mechanism (9) and a lower finishing mechanism (10) respectively arranged on the outer side wall of the upper shaft box (6). The machine platform (1) comprises an upper grinding mechanism (11) and an upper trimming mechanism (12), and an upper rotation driving mechanism (13) and a lower rotation driving mechanism (14) respectively arranged on the machine platform (1), wherein the upper rotation driving mechanism (13) is used to drive the upper rotating shaft (7) to rotate, and the lower rotation driving mechanism (14) is used to drive the lower rotating shaft (3) to rotate, the lower grinding mechanism (9) and the lower trimming mechanism (10) are respectively used to grind and trim the contour of the lower welding wheel (4), the upper grinding mechanism (11) and the upper trimming mechanism (12) are respectively used to grind and trim the contour of the upper welding wheel (8), and the lifting driving mechanism (5) is used to drive the upper welding wheel (8) to approach or move away from the lower welding wheel (4).

2. A seam welding machine according to claim 1, characterized in that: The upper grinding mechanism (11) or / and the lower grinding mechanism (9) comprises a grinding seat (15) mounted on the outer wall of the upper axle box (6) or the outer wall of the lower axle box (2), a grinding cylinder (16) mounted on the grinding seat (15), a moving block (17) mounted on the piston rod of the grinding cylinder (16), a grinding motor (18) mounted on the moving block (17), and a grinding wheel (19) mounted on the output shaft of the grinding motor (18); the grinding cylinder (16) is used to drive the moving block (17) to approach or move away from the upper welding wheel (8) or the lower welding wheel (4); and the grinding wheel (19) is used to grind the upper welding wheel (8) or the lower welding wheel (4).

3. A seam welding machine according to claim 1, characterized in that: The upper trimming mechanism (12) or / and the lower trimming mechanism (10) comprises a trimming seat (20) mounted on the outer wall of the upper shaft box (6) or the outer wall of the lower shaft box (2), a trimming cylinder (21) mounted on the trimming seat (20), and a trimming block (22) mounted on the piston rod of the trimming cylinder (21); the trimming block (22) is used to trim the contour of the upper welding wheel (8) or the lower welding wheel (4); and the trimming cylinder (21) is used to drive the trimming block (22) to move closer to or farther away from the upper welding wheel (8) or the lower welding wheel (4).

4. A seam welding machine according to claim 3, characterized in that: The trimming surface of the trimming block (22) is concavely provided with a trimming groove (23).

5. A seam welding machine according to claim 1, characterized in that: The outer side wall of the upper axle box (6) or / and the outer side wall of the lower axle box (2) is provided with a welding wheel wear monitoring mechanism (24), and the welding wheel wear monitoring mechanism (24) is used to monitor the wear amount of the upper welding wheel (8) or / and the lower welding wheel (4).

6. A seam welding machine according to claim 5, characterized in that: The welding wheel wear monitoring mechanism (24) comprises a monitoring seat (25) mounted on the outer side wall of an upper axle box (6) or the outer side wall of a lower axle box (2), a monitoring cylinder (26) mounted on the monitoring seat (25), a wheel seat (27) mounted on the piston rod of the monitoring cylinder (26), a monitoring wheel (28) rotatably connected to the wheel seat (27), and a displacement sensor (29) mounted on the monitoring seat (25), wherein the wheel seat (27) is provided with a sensing block (30), and the displacement sensor (29) is used to detect the displacement of the sensing block (30), and the monitoring wheel (28) rolls against the contour of the upper welding wheel (8) or the contour of the lower welding wheel (4).

7. A seam welding machine according to claim 1, characterized in that: The machine platform (1) or the lower axle box (2) is equipped with a cooling liquid spraying mechanism.

8. A seam welding machine according to claim 7, characterized in that: The machine platform (1) is provided with a cooling liquid recovery pool (31), and the lower welding wheel (4) is located in the cooling liquid recovery pool (31).

9. A seam welding machine according to claim 1, characterized in that: Silver-inlaid brushes (32) are arranged in both the upper shaft box (6) and the lower shaft box (2). The silver-inlaid brushes (32) are electrically connected to a conductive member (33). The silver-inlaid brushes (32) are rotationally connected to the upper rotating shaft (7) or the lower rotating shaft (3) and are used to supply power to the upper rotating shaft (7) or the lower rotating shaft (3).

10. A seam welding machine according to claim 1, characterized in that: The upper rotation drive mechanism (13) or / and the lower rotation drive mechanism (14) comprises a rotation motor (34) mounted on the machine platform (1), a cross-axis universal joint (35) connected to the output shaft of the rotation motor (34), a fixing seat (36) mounted on the outer wall of the upper shaft box (6) or the lower shaft box (2), a shaft rod rotatably connected to the fixing seat (36), a first bevel gear set transmission-connected to one end of the shaft rod and one end of the cross-axis universal joint (35), and a second bevel gear set (37) transmission-connected to the other end of the shaft rod and the upper rotating shaft (7) or the lower rotating shaft (3).

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