An infrasonic repair machine based on big data
Through the infrasonic repair machine based on big data, the steel surface is comprehensively inspected and repaired by infrasonic detection device, which solves the problem of low crack detection efficiency in steel processing, and realizes accurate repair and polishing of the steel surface, improving work efficiency and accuracy sex.
Patent Information
- Application Number
- CN202111254351.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-10-27
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2041-10-27
AI Technical Summary
During steel processing, crack detection efficiency is low and it is difficult to accurately determine the location of the crack, especially when there are many cracks on the steel surface, it is difficult to achieve large-scale accurate repair.
A large data-based infrasonic repair machine is designed to comprehensively detect the steel surface using the infrasonic detection device, transmit position information to the control center through big data, accurately locate cracks and repair and polish.
It realizes accurate repair and polishing of steel surfaces, improves work efficiency, narrows the crack search range, and ensures the accuracy and speed of repair.
Smart Images
Figure CN113909898B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of steel repair, and in particular relates to an infrasonic repair machine based on big data. Background Art
[0002] As we all know, steel is steel ingots, steel billets or steel products that are processed by pressure into various shapes as required. They are important materials that are indispensable for the construction and realization of the four modernizations. They are widely used and come in a wide variety of varieties. Cracks will appear in the processing process. The cracks are caused by improper hole design, poor adjustment, low or uneven steel temperature, severe hole wear, unreasonable notches, raw material bubble rupture and raw material cracks. Some can be carefully inspected with the naked eye, while some cannot be seen and are difficult to distinguish. Manual inspection is inefficient and it is difficult to accurately determine the location of the cracks. Moreover, it is difficult to use the commonly used sampling pickling and sampling torsion bending methods to detect large steel products. When there are many cracks on the steel surface, it is difficult to weld the mesh cracks on a large scale and ensure accuracy. Summary of the invention
[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose an infrasonic repair machine based on big data. The infrasonic repair machine based on big data can perform accurate and effective repair and polishing when the steel surface is damaged.
[0004] The objectives of the present invention can be achieved through the following technical solutions: an infrasonic repair machine based on big data, comprising a shell, characterized in that an upper left cavity is provided on the upper left of the shell, a main cavity is provided on the upper side of the shell, a lower side cavity is provided on the lower left of the shell, a control center is provided on the lower right of the shell, a steel inlet is provided on the left side wall of the shell, a steel outlet is provided on the right side wall of the shell, a universal rotating shaft is provided for rotation in the shell, a cavity is provided in the shell, an array slide is provided in the annular array on the right side of the cavity, a left rotating shaft is provided for rotation in the cavity, a lower rotating shaft is provided for rotation on the lower side of the cavity, fixed L-shaped blocks are provided on the upper and lower surfaces of the cavity, and an infrasonic wave detection device is provided in the cavity, which is used to detect damage on the surface of the steel and transmit the position information back to the control center through big data.
[0005] Preferably, the infrasonic wave detection device includes a first motor fixedly provided in the main cavity, a reverse bevel gear fixedly provided on the output end of the first motor, a round table fixedly provided on the fixed L-shaped block, an arc-shaped slide groove provided on the round table, the output end of the first motor passes through a through hole on the round table, a forward angle rod fixedly provided on the output end of the first motor, a swing rod hingedly provided on the forward angle rod, and a swing disk fixedly provided on the swing rod.
[0006] Preferably, an infrasonic wave device is provided in the swinging plate, a T-shaped slider is fixedly provided on the outer surface of the swinging plate, the T-shaped slider slides in the arc-shaped slide groove, a left-side hinge block is fixedly provided in an annular array on the swinging plate, a hinge rod is hingedly provided in the left-side hinge block, the swing rod is hingedly provided with a reverse angle rod, a short rod is fixedly provided on the lower surface of the reverse angle rod, and the short rod is hingedly connected to the frustum.
[0007] Preferably, universal bevel gears are fixed at both ends of the universal rotating shaft, and the universal rotating shaft has one in the XYZ plane and meshes with each other through the universal bevel gears fixed at both ends, and the universal bevel gear meshes with the reverse bevel gear, and a lower bevel gear is fixed at the lower end of the lower rotating shaft, and the lower bevel gear meshes with the universal bevel gear, a contact rod is fixed on the lower rotating shaft, a rotating rod is fixed at the end of the lower rotating shaft, and a round rod is fixed on the rotating rod, a recessed block is fixed on the left rotating shaft, and a rotating table is fixed on the left rotating shaft, a U-shaped groove is provided on the rotating table, and the rotating table is discontinuously abutted against the contact rod, and a repair and grinding device is provided in the cavity, and the repair and grinding device is used to weld and repair and grind the information position of the damaged steel received by the control center.
[0008] Preferably, the repair and polishing device includes a movable slider sliding in the array slide groove, a second motor is fixed on the movable slider, a forward bevel gear is fixed on the output end of the second motor, a driven disk is fixed on the movable slider, a right-side hinge block is fixed on the driven disk, the right-side hinge block is hingedly connected to the hinge rod, a driven shaft is rotatably provided with a circular array in the driven disk, spur gears are fixed on the driven shafts, V-shaped wheels are fixed on the driven shafts, V-belts are provided on the V-shaped wheels, and an intermediate bevel gear is fixed on the end of the right-side driven shaft.
[0009] Preferably, the intermediate bevel gear is meshed with the forward bevel gear, a concave groove is provided in the driven disc, a rotating disc is provided in the concave groove, the rotating disc is meshed with the spur gear, an information receiver is provided in the rotating disc, an electric welding gun is fixedly provided in the rotating disc, a rectangular groove is provided in the rotating disc, an electromagnetic block is fixedly provided in the rectangular groove, an arc-shaped magnetic rod is slidably provided in the rectangular groove, sandpaper is fixedly provided on the arc-shaped surface of the arc-shaped magnetic rod, and an insulating spring is provided on the arc-shaped magnetic rod.
[0010] When the infrasonic repair machine is working, the steel enters through the steel inlet and passes through the middle of the two recessed blocks. At this time, the first motor is energized and starts to rotate, and the reverse bevel gear fixed on the output end starts to rotate. The power is transmitted through the universal bevel gear in the main cavity meshing with the reverse bevel gear. The universal rotating shaft in the XYZ plane transmits the power to the universal bevel gear in the lower cavity through the meshing of teeth, and the lower bevel gear meshing with it rotates. Since the lower bevel gear is fixed to the lower end of the lower rotating shaft, the lower rotating shaft starts to rotate, and the rotating rod and contact rod fixed on the lower rotating shaft start to rotate, and the round rod fixed on the lower surface of the rotating rod starts to rotate. During the rotation of the round rod, it slides into the U-shaped groove to drive the rotating table to rotate discontinuously. Since the rotating table is fixed on the left rotating shaft, The left rotating shaft starts to rotate, and the steel located between the two recessed blocks moves under the action of friction, and the forward angle rod fixed at the output end of the first motor starts to rotate. The swing rod hinged to it is fixed on the swing plate, and the swing rod fixed on the other end of the swing plate is hinged to the reverse angle rod. Then, the swing plate starts to rotate in the horizontal plane under the action of power transmission. Since the T-shaped slider is fixed on the swing plate and the T-shaped slider is slidably connected in the arc-shaped slide groove opened on the truncated table, the swing plate moves in the horizontal plane and the vertical plane at the same time, and the infrasonic device located in the swing plate also moves along the motion trajectory. The infrasonic device performs a large-scale comprehensive infrasonic detection on the surface of the steel and sends the detected damaged position to the control center through big data.
[0011] Since the left hinge block is fixed on the swing plate and a hinge rod is hinged in the left hinge block, and the other end of the hinge rod is hinged and fixed in the right hinge block on the driven plate, since the moving slider is slidably connected in the array slide groove, as the moving slider starts to move left and right under the motion trajectory of the swing plate, when the steel passes through the rotating disc, the control center sends the received damage position information to the information receiver, and the second motor starts to be powered on and rotates, and the forward bevel gear at the output end of the second motor starts to rotate, and the intermediate bevel gear meshing with it starts to rotate. Since the intermediate bevel gear is fixed on the right driven shaft, the right side of the driven shaft starts to rotate, and the The spur gear and V-wheel on the shaft start to rotate. Since the V-wheel is in friction contact with the V-belt, the V-wheel in the annular array starts to rotate. Since the spur gear is meshed with the rotating disc, the rotating disc starts to rotate. In this state, the motion trajectory of the rotating disc is in the horizontal and vertical planes. The welding gun starts to weld to repair the surface damage of the steel. When the repair is completed, the welding is stopped. At this time, the electromagnetic block starts to be energized. The arc-shaped magnetic rod in the rectangular groove compresses the insulating spring under the action of magnetic force. Then the sandpaper on the surface of the arc-shaped magnetic rod starts to contact the steel. Under the motion trajectory of the rotating disc, burrs on the welding begin to be produced and polished, and finally discharged from the machine through the steel outlet.
[0012] Compared with the existing technology, this infrasonic repair machine based on big data has the following advantages:
[0013] 1. During the infrasonic scanning process, the infrasonic wave swings in the horizontal and vertical planes to scan the steel surface in a circular manner, accurately scan the crack location, narrow the crack search range, increase the effective time and work efficiency, and upload the location information to the control center.
[0014] 2. Repair and grinding: Receive the crack position information from the control center, accurately repair and grind the steel surface, quickly and effectively repair the surface around the crack, and grind the burrs after repair to improve work efficiency
[0015] 3. Intermittently move the steel into the machine to allow sufficient time for scanning and repair and polishing, so as to accurately record the position information. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the infrasonic repair machine based on big data.
[0017] Figure 2 yes Figure 1 Section view along AA direction.
[0018] Figure 3 yes Figure 2 Cross-sectional view along BB direction.
[0019] Figure 4 yes Figure 2 Sectional view along CC direction.
[0020] Figure 5 yes Figure 3 Cross-sectional view in the DD direction.
[0021] Figure 6 yes Figure 3 Cross-sectional view along EE direction.
[0022] Figure 7 yes Figure 2 Enlarged view of the structure at F in the middle.
[0023] Figure 8 yes Figure 2 Enlarged view of the structure at G in the middle.
[0024] In the figure, 10, housing; 11, upper left chamber; 12, main chamber; 13, lower chamber; 14, universal bevel gear; 15, universal rotating shaft; 16, first motor; 17, reverse bevel gear; 18, lower bevel gear; 19, moving slider; 20, array slide; 21, steel inlet; 22, round table; 23, fixed L-shaped block; 24, rotating rod; 25, contact rod; 26, recessed block; 27, rotating table; 28, short rod; 29, reverse angle rod; 30, swing rod; 31, forward angle rod; 32, subsonic device; 33, hinged rod; 34, swing plate; 35, forward bevel gear; 3 6. Intermediate bevel gear; 37. V-belt; 38. Information receiver; 39. Rotating disc; 40. Electric welding gun; 41. Arc magnetic rod; 42. V-shaped wheel; 43. Driven shaft; 44. Spur gear; 45. Left shaft; 46. Arc slide; 47. T-shaped slider; 48. Concave groove; 49. Sandpaper; 50. Cavity; 51. Round rod; 52. Left hinge block; 53. Control center; 54. Electromagnetic block; 55. Driven disc; 56. Insulating spring; 57. U-shaped groove; 58. Lower shaft; 59. Right hinge block; 60. Rectangular groove; 61. Steel export; 62. Second motor. DETAILED DESCRIPTION
[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0026] like Figure 1 As shown, an infrasonic repair machine based on big data includes a shell 10, characterized in that an upper left cavity 11 is provided at the upper left of the shell 10, a main cavity 12 is provided on the upper side of the shell 10, a lower side cavity 13 is provided at the lower left of the shell 10, a control center 53 is provided at the lower right of the shell 10, a steel inlet 21 is provided on the left side wall of the shell 10, a steel outlet 61 is provided on the right side wall of the shell 10, a universal rotating shaft 15 is rotatably provided in the shell 10, a cavity 50 is provided in the shell 10, an array slide 20 is provided in a circular array on the right side of the cavity 50, a left rotating shaft 45 is rotatably provided in the cavity 50, a lower rotating shaft 58 is rotatably provided on the lower side of the cavity 50, fixed L-shaped blocks 23 are provided on the upper and lower surfaces of the cavity 50, and an infrasonic wave detection device is provided in the cavity 50, which is used to detect damage on the surface of the steel and transmit the position information back to the control center through big data.
[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the infrasonic wave detection device includes a first motor 16 fixedly provided in a main cavity 12, a reverse bevel gear 17 fixedly provided on the output end of the first motor 16, a truncated table 22 fixedly provided on a fixed L-shaped block 23, an arc-shaped slide groove 46 provided on the truncated table 22, the output end of the first motor 16 passes through a through hole on the truncated table 22, a forward angle rod 31 fixedly provided on the output end of the first motor 16, a swing rod 30 hingedly provided on the forward angle rod 31, and a swing plate 34 fixedly provided on the swing rod 30.
[0028] like Figure 1 , Figure 2 and Figure 3 As shown, an infrasonic wave device 32 is provided in the swing plate 34, a T-shaped slider 47 is fixedly provided on the outer surface of the swing plate 34, the T-shaped slider 47 slides in the arc-shaped slide groove 46, a left hinge block 52 is fixedly provided in a circular array on the swing plate 34, a hinge rod 33 is hingedly provided in the left hinge block 52, the swing rod 30 is hingedly provided with a reverse angle rod 29, a short rod 28 is fixedly provided on the lower surface of the reverse angle rod 29, and the short rod 28 is hingedly connected to the round table 22.
[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, universal bevel gears 14 are fixed at both ends of the universal rotating shaft 15, and the universal rotating shaft 15 has one universal bevel gear 14 in the XYZ plane and meshes with each other through the universal bevel gears 14 fixed at both ends, and the universal bevel gear 14 meshes with the reverse bevel gear 17, and a lower bevel gear 18 is fixed at the lower end of the lower rotating shaft 58, and the lower bevel gear 18 meshes with the universal bevel gear 14, a contact rod 25 is fixed on the lower rotating shaft 58, and a rotating rod 24 is fixed at the end of the lower rotating shaft 58, and a round rod 51 is fixed on the rotating rod 24, a recessed block 26 is fixed on the left rotating shaft 45, and a rotating table 27 is fixed on the left rotating shaft 45, and a U-shaped groove 57 is provided on the rotating table 27, and the rotating table 27 is discontinuously abutted with the contact rod 25, and a repair and grinding device is provided in the cavity 50, and the repair and grinding device is used to weld and repair the information position of the damaged steel received by the control center and perform grinding.
[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the repairing and polishing device includes a movable slider 19 slidingly provided in an array slide groove 20, a second motor 62 is fixedly provided on the movable slider 19, a forward bevel gear 35 is fixedly provided at the output end of the second motor 62, a driven disk 55 is fixedly provided on the movable slider 19, a right-side hinge block 59 is fixedly provided on the driven disk 55, the right-side hinge block 59 is hingedly connected to the hinge rod 33, a driven shaft 43 is rotatably provided in an annular array in the driven disk 55, a spur gear 44 is fixedly provided on the driven shaft 43, a V-shaped wheel 42 is fixedly provided on the driven shaft 43, a V-belt 37 is provided on the V-shaped wheel 42, and an intermediate bevel gear 36 is fixedly provided at the end of the right-side driven shaft 43.
[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the intermediate bevel gear 36 is meshed with the forward bevel gear 35, and a concave groove 48 is provided in the driven plate 55.
[0032] A rotating disk 39 is provided inside, the rotating disk 39 is meshed with a spur gear 44, an information receiver 38 is provided inside the rotating disk 39, an electric welding gun 40 is fixedly provided inside the rotating disk 39, a rectangular groove 60 is provided inside the rotating disk 39, an electromagnetic block 54 is fixedly provided inside the rectangular groove 60, an arc-shaped magnetic rod 41 is slidably provided inside the rectangular groove 60, sandpaper 49 is fixedly provided on the arc-shaped surface of the arc-shaped magnetic rod 41, and an insulating spring 56 is provided on the arc-shaped magnetic rod 41.
[0033] When the infrasonic repair machine is working, the steel enters through the steel inlet 21 and passes between the two recessed blocks 26. At this time, the first motor 16 is energized and starts to rotate, and the reverse bevel gear 17 fixed on the output end starts to rotate. The power is transmitted through the universal bevel gear 14 in the main cavity 12 meshing with the reverse bevel gear 17. The universal rotating shaft 15 in the XYZ plane transmits the power to the universal bevel gear 14 in the lower cavity 13 through the meshing of teeth, and the lower bevel gear 18 meshing therewith rotates. Since the lower bevel gear 18 is fixed to the lower end of the lower rotating shaft 58, the lower rotating shaft 58 starts to rotate, and the rotating rod 24 and the contact rod 25 fixed on the lower rotating shaft 58 start to rotate, and the round rod 51 fixed on the lower surface of the rotating rod 24 starts to rotate. During the rotation of the round rod 51, it slides into the U-shaped groove 57 to drive the rotating table 27 to rotate discontinuously. Since the rotating table 27 is fixed on the left rotating shaft 45, the left rotating shaft 45 starts to rotate, the steel located between the two recessed blocks 26 moves under the action of friction, and the positive angle rod 31 fixed to the output end of the first motor 16 starts to rotate, and the swing rod 30 hinged thereto is fixed on the swing plate 34, and the swing rod 30 fixed on the other end of the swing plate 34 is hinged with the reverse angle rod 29, then the swing plate 34 starts to rotate in the horizontal plane under the action of power transmission, and since the T-shaped slider 47 is fixed on the swing plate 34 and the T-shaped slider 47 is slidably connected in the arc-shaped slide groove 46 opened in the round table 22, the swing plate 34 moves simultaneously in the horizontal plane and the vertical plane, and the infrasonic wave device 32 located in the swing plate 34 also moves along the motion trajectory, and the infrasonic wave device 32 sends the detected damaged position to the control center 53 through big data by performing a large-scale comprehensive infrasonic wave detection on the surface of the steel.
[0034] Since the left hinge block 52 is fixed on the swing plate 34 and the hinge rod 33 is hinged in the left hinge block 52, the other end of the hinge rod 33 is hinged and fixed in the right hinge block 59 on the driven plate 55, and since the moving slider 19 is slidably connected in the array slide groove 20, as the moving slider 19 starts to move left and right under the motion trajectory of the swing plate 34, when the steel passes through the rotating disk 39, the control center 53 sends the received damage position information to the information receiver 38, and at this time the second motor 62 starts to be powered on and rotated, and the forward bevel gear 35 at the output end of the second motor 62 starts to rotate, and the intermediate bevel gear 36 meshing therewith starts to rotate. Since the intermediate bevel gear 36 is fixed on the right driven shaft 43, the right side of the driven shaft 43 starts to rotate, and the fixed on the right driven shaft The spur gear 44 and the V-wheel 42 on the moving shaft 43 start to rotate. Since the V-wheel 42 is in friction contact with the V-belt 37, the V-wheel 42 in the annular array starts to rotate. Since the spur gear 44 is meshed with the rotating disk 39, the rotating disk 39 starts to rotate. In this state, the movement trajectory of the rotating disk 39 is in the horizontal plane and the vertical plane. The electric welding gun 40 starts to weld to repair the surface damage of the steel. When the repair is completed, the welding is stopped. At this time, the electromagnetic block 54 starts to be energized. The arc-shaped magnetic rod 41 in the rectangular groove 60 compresses the insulating spring 56 under the action of magnetic force. Then, the sandpaper 49 on the surface of the arc-shaped magnetic rod 41 starts to contact the steel. Under the movement trajectory of the rotating disk 39, burrs on the welding begin to be produced and polished, and finally discharged from the machine through the steel outlet 61.
[0035] The above descriptions are merely embodiments of the present invention, and are not intended to limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An infrasonic repair machine based on big data, comprising a housing (10), characterized in that: The shell (10) is provided with a left upper chamber (11) at the upper left, a main chamber (12) is provided on the upper side of the shell (10), a lower chamber (13) is provided at the lower left of the shell (10), a control center (53) is provided at the lower right of the shell (10), a steel material inlet (21) is provided on the left side wall of the shell (10), a steel material outlet (61) is provided on the right side wall of the shell (10), a universal rotating shaft (15) is rotatably provided in the shell (10), and a steel material outlet (61) is provided in the shell (10). A cavity (50) is provided, an array slide groove (20) is provided in a circular array on the right side of the cavity (50), a left rotating shaft (45) is rotatably provided in the cavity (50), a lower rotating shaft (58) is rotatably provided on the lower side of the cavity (50), fixed L-shaped blocks (23) are provided on the upper and lower surfaces of the cavity (50), and an infrasonic wave detection device is provided in the cavity (50), which is used to detect damage on the surface of the steel material and transmit the position information back to the control center through big data; The infrasonic wave detection device comprises a first motor (16) fixedly arranged in the main cavity (12), a reverse bevel gear (17) fixedly arranged on the output end of the first motor (16), a round table (22) fixedly arranged on the fixed L-shaped block (23), an arc-shaped slide groove (46) arranged on the round table (22), the output end of the first motor (16) passes through a through hole on the round table (22), a forward angle rod (31) fixedly arranged on the output end of the first motor (16), a swing rod (30) hingedly arranged on the forward angle rod (31), and a swing plate (34) fixedly arranged on the swing rod (30); The swing plate (34) is provided with an infrasonic wave device (32). The outer surface of the swing plate (34) is fixedly provided with a T-shaped slider (47), and the T-shaped slider (47) slides in the arc-shaped slide groove (46). The swing plate (34) is fixedly provided with a left hinge block (52) in an annular array, and a hinge rod (33) is hingedly provided in the left hinge block (52). The swing rod (30) is hingedly provided with a reverse angle rod (29), and a short rod (28) is fixedly provided on the lower surface of the reverse angle rod (29), and the short rod (28) is hingedly connected to the round table (22); Both ends of the universal rotating shaft (15) are fixed with universal bevel gears (14), and the universal rotating shaft (15) has one universal bevel gear (14) fixed at both ends in the XYZ plane, and both are meshed with each other through the universal bevel gears (14) fixed at both ends, and the universal bevel gear (14) is meshed with the reverse bevel gear (17), and the lower end of the lower rotating shaft (58) is fixed with a lower bevel gear (18), and the lower bevel gear (18) is meshed with the universal bevel gear (14), and a contact rod (25) is fixed on the lower rotating shaft (58), and the lower rotating shaft ( 58) is fixedly provided with a rotating rod (24) at the end thereof, a round rod (51) is fixedly provided on the rotating rod (24), a recessed block (26) is fixedly provided on the left rotating shaft (45), a rotating table (27) is fixedly provided on the left rotating shaft (45), a U-shaped groove (57) is provided on the rotating table (27), the rotating table (27) is discontinuously abutted against the contact rod (25), a repairing and grinding device is provided in the cavity (50), and the repairing and grinding device is used to weld and repair and grind the position of the damaged steel information received by the control center; The repairing and polishing device comprises a movable slider (19) slidingly arranged in the array slide groove (20), a second motor (62) fixedly arranged on the movable slider (19), a forward bevel gear (35) fixedly arranged on the output end of the second motor (62), a driven disk (55) fixedly arranged on the movable slider (19), a right hinge block (59) fixedly arranged on the driven disk (55), the right hinge block (59) being hinge-connected to the hinge rod (33), a driven rotating shaft (43) rotatably arranged in an annular array in the driven disk (55), a spur gear (44) fixedly arranged on the driven rotating shaft (43), a V-shaped wheel (42) fixedly arranged on the driven rotating shaft (43), a V-belt (37) arranged on the V-shaped wheel (42), and an intermediate bevel gear (36) fixedly arranged at the end of the right driven rotating shaft (43); The intermediate bevel gear (36) is meshed with the forward bevel gear (35); a concave groove (48) is provided in the driven disc (55); a rotating disc (39) is provided in the concave groove (48); the rotating disc (39) is meshed with the spur gear (44); an information receiver (38) is provided in the rotating disc (39); an electric welding gun (40) is fixedly provided in the rotating disc (39); a rectangular groove (60) is provided in the rotating disc (39); an electromagnetic block (54) is fixedly provided in the rectangular groove (60); an arc-shaped magnetic rod (41) is slidably provided in the rectangular groove (60); sandpaper (49) is fixedly provided on the arc-shaped surface of the arc-shaped magnetic rod (41); and an insulating spring (56) is provided on the arc-shaped magnetic rod (41).