A steel coil inner core automatic welding device and use method thereof

Abstract

The present invention relates to the technical field of steel coil inner core processing, specifically to an automatic welding device for steel coil inner core and a method for using the same, comprising a base, the surface of the base is fixedly connected to an electric slide rail, the lower end of the electric slide rail is fixedly connected to an auxiliary device, the auxiliary device comprises a fixed slide rod, the fixed slide rod is slidably connected inside the electric slide rail, a slide groove is provided on the side of the fixed slide rod, the slide groove is slidably connected to a sliding rod, and the other end of the sliding rod is fixedly connected to an arc frame. In the present invention, the rotating rod is driven to rotate on the surface of the disc by a spline rod, and the arc plate expands inside the steel coil inner core when the arc plate expands in an arc shape, so that the steel coil inner core can be supported to prevent the edge of the steel coil inner core from being uneven, which makes it difficult to overlap the welding during welding and affects the welding quality. At the same time, the edge of the steel coil inner core that needs to be welded can be supported to maintain stability during welding.

Description

Technical Field

[0001] The invention relates to the technical field of steel coil inner core processing, and in particular to an automatic welding device for steel coil inner core and a use method thereof. Background Art

[0002] In the manufacturing process of steel coils, the inner core plays an important role in supporting and facilitating the winding of steel. The steel coil inner core automated welding device is used to weld the various parts of the steel coil inner core together to form a complete inner core structure. For example, when large steel companies produce hot-rolled steel coils or cold-rolled steel coils, the inner core is usually composed of multiple metal parts. The automated welding device can quickly and accurately complete the welding to ensure that the strength and roundness of the inner core meet the requirements of steel coil winding.

[0003] The existing patent (publication number: CN 117359144 A) discloses an automatic welding device for the inner core of a steel coil, including a transmission frame, a tray overlapped on the top of the transmission frame, and a steel coil placed on the top surface of the tray. The automatic welding device for the inner core of the steel coil moves the steel coil to the end position of the detection block, so that the detection block after the limit is released by the extrusion spring is overlapped at the welding position. As the steel coil continues to translate, when a leak occurs at the welding position of the end face of the steel coil, the detection block is inserted into the weld position to automatically detect the leak. However, during the actual operation, the inner core of the steel coil will be subjected to external force majeure, resulting in deformation at the connecting edges of the two inner cores of the steel coils, making it difficult to weld seamlessly. In the traditional welding mode, the inner core of the steel coil rotates and the welding mechanism is fixed for welding. This method will cause the inner core of the steel coil to shake, thereby reducing the quality of welding. Therefore, an automatic welding device for the inner core of the steel coil is needed. Summary of the invention

[0004] The object of the present invention is to provide an automatic welding device for the inner core of a steel coil and a method for using the same, so as to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic welding device for the inner core of a steel coil and a method for using the same, comprising a base, the surface of the base is fixedly connected with an electric slide rail, the lower end of the electric slide rail is fixedly connected with an auxiliary device, the auxiliary device comprises a fixed slide rod, the fixed slide rod is slidably connected inside the electric slide rail, a slide groove is provided on the side of the fixed slide rod, the slide groove is slidably connected with a slide rod, the other end of the slide rod is fixedly connected with an arc frame, the lower end of the electric slide rail is provided with an inclined groove, the side of the arc frame is fixedly connected with a slide rod, the slide rod is slidably connected inside the inclined groove, the side of the fixed slide rod is fixedly connected with a moving mechanism, the side of the moving mechanism is fixedly connected with a supporting mechanism, and the surface of the base is fixedly connected with a welding mechanism.

[0005] Preferably, the moving mechanism includes a hollow roller, which is fixedly connected to the side of the fixed sliding rod, and the interior of the hollow roller is fixedly connected to a hollow sleeve rod, and the surface of the hollow sleeve rod is slidingly connected to a limit ring, and a spring is provided between the limit ring and the interior of the hollow roller, and the interior of the hollow roller is rotatably connected to a bidirectional threaded rod, and the surface of one end of the bidirectional threaded rod is threadedly connected to a threaded ring, and the surface of the other end of the bidirectional threaded rod is threadedly connected to a threaded sleeve, and the interior of the hollow sleeve rod is fixedly connected to a spline slideway.

[0006] Preferably, the supporting mechanism comprises a disc, which is fixedly connected to one end of a hollow sleeve rod through a supporting rod, an arc-shaped groove is provided on the circumference of the surface of the disc, the surface of the disc is rotatably connected to a rotating rod, a telescopic spring is provided inside the rotating rod, a spline rod is slidably connected inside the rotating rod, the other end of the spline rod is fixedly connected to the sleeve rod, a connecting rod is hinged on the surface of the sleeve rod, the arc groove is slidably connected to a U-shaped rod, and the other end of the U-shaped rod is fixedly connected to an arc plate.

[0007] Preferably, the welding mechanism includes a driving motor, which is fixedly connected to the surface of the base, one end of the driving motor output shaft is fixedly connected to a gear, the base is fixedly connected to an arc groove, the inner rotation of the arc groove is connected to an annular ring, a limited arc groove is provided on the surface of the annular ring, the inner rotation of the annular ring is connected to a gear ring, the surface of the gear ring is fixedly connected to a knob, the inner ring of the gear ring is fixedly connected to teeth, the inner rotation of the annular ring is connected to a half gear, and the lower end of the half gear is fixedly connected to the welding machine body.

[0008] Preferably, the upper end of the threaded ring is fixedly connected to a limiting ring, and the threaded sleeve slides within the hollow sleeve rod through a spline slideway.

[0009] Preferably, the other end of the connecting rod is hinged to the arc plate, and the sleeve rod is slidably connected on the surface of the disc through a spline rod.

[0010] Preferably, the gear is meshed with the gear ring, the knob is slidably connected inside the limiting arc groove, and the teeth are meshed with the half gear.

[0011] A method for using a steel coil inner core automatic welding device comprises the following steps:

[0012] S1. First, the inner cores of the two steel coils are sleeved on the surface of the hollow sleeve rod, and then the electric slide rail is started. The electric slide rail drives the two fixed slide rods to move inward. When the fixed slide rod moves, it drives the hollow roller on the side and the hollow sleeve rod in the hollow roller to move inward at the same time. The two hollow sleeve rods drive the inner cores of the steel coils on the surface to move at the same time. When the ends of the two steel coil cores are attached to each other, the fixed slide rod continues to move a distance, and at the same time, the other end of the steel coil core will enter the interior of the hollow roller. At this time, the inner core of the steel coil will be in a relatively static state and squeeze the limiting ring on the surface of the hollow sleeve rod. The limiting ring is relatively squeezed. When the limiting ring is squeezed, it will move backward inside the hollow sleeve rod. At the same time, the limiting ring is limited by the hollow sleeve rod and can only move backward. When the limiting ring moves backward, it will drive the threaded ring at the lower end to move at the same time. The threaded ring moves on the surface of the bidirectional threaded rod and drives the bidirectional threaded rod to rotate. When the bidirectional threaded rod rotates, it drives the threaded sleeve at the other end to move forward, and the threaded sleeve is limited by the spline slideway;

[0013] S2. The threaded sleeve moves inside the hollow sleeve rod toward the place where the two steel ring inner cores contact, and at the same time, the threaded sleeve squeezes the sleeve rod. When the sleeve rod is squeezed, it drives the spline rod to slide downward inside the rotating rod. When the sleeve rod moves downward, it squeezes the connecting rod. When the connecting rod is squeezed, it squeezes the arc plate at the other end. When the arc plate is squeezed, it drives the U-shaped rod to move in an arc inside the arc groove and expands on the edge of the disc. When the arc plate drives the connecting rod to move in an arc, it drives the sleeve rod to drive the rotating rod to rotate on the surface of the disc through the spline rod. When the arc plate expands in an arc, it expands inside the steel coil inner core, which can support the steel coil inner core and also support the edge of the steel coil inner core that needs to be welded.

[0014] S3. When the inner cores of the two steel coils are relatively fitted together, the electric slide rail is stopped, and the drive motor is started. The drive motor drives the gear to rotate. When the gear rotates, the meshing gear ring is driven to rotate inside the annular ring first, and at the same time, the gear ring drives the knob to slide inside the limiting arc groove. When the gear ring rotates inside the annular ring, it drives the teeth to move, and the teeth drive the meshing half gear to rotate. When the half gear rotates, it drives the welding machine body to align and move vertically downward. At this time, the gear continues to drive the meshing gear ring to rotate, and at this time, the gear ring is limited by the limiting arc groove through the knob, driving the entire annular ring to rotate inside the arc slide groove, and at the same time driving the welding machine body to perform annular welding on the inner cores of the two steel coils. In this way, when welding is required, the welding machine body can be driven to contact the inner core of the steel coil, thereby protecting the welding machine body. After welding is completed, manually turning the knob to reset will cause the welding machine body to continue to be in an inclined state;

[0015] S4. When the electric slide rail drives the fixed slide bar to move relative to each other, it also drives the slide bar connected to the side of the fixed slide bar to move simultaneously. The slide bar drives the arc frame to move simultaneously. When the arc frame moves, it drives the slide bars on both sides to move inside the inclined groove. The arc frame drives the slide bar to slide downward along the track of the inclined groove until it contacts the inner core of the steel coil, thus forming internal and external supports.

[0016] In the present invention, the spline rod is used to drive the rotating rod to rotate on the surface of the disc. When the arc plate expands in an arc shape, it expands inside the inner core of the steel coil, which can support the inner core of the steel coil to prevent the edge of the inner core of the steel coil from being uneven, thereby making it difficult to weld and overlap during welding, affecting the quality of welding. At the same time, the edge of the inner core of the steel coil that needs to be welded can be supported to maintain stability during welding.

[0017] In the present invention, the annular ring rotates inside the arc-shaped slide groove, and at the same time drives the welding machine body to perform annular welding on the inner cores of the two steel coils. In this way, the welding machine body can be driven to contact the inner core of the steel coil when welding is required, which not only ensures the welding efficiency, but also improves the safety and protects the welding machine body.

[0018] In the present invention, when the arc frame moves, the sliding rods on both sides are driven to move inside the inclined groove, and the arc frame drives the sliding rods to slide downward along the trajectory of the inclined groove until they contact the inner core of the steel coil, thus forming internal and external supports, further ensuring the stability of the inner core of the steel coil during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention;

[0020] Figure 2 It is a schematic diagram of the side structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the auxiliary device of the present invention;

[0022] Figure 4 It is a schematic diagram of the surface structure of the base of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the mobile mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the side cross-sectional structure of the hollow roller of the present invention;

[0025] Figure 7 It is a schematic diagram of the inner side cross-sectional structure of the moving mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the supporting mechanism structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the curved plate and other structures of the present invention;

[0028] Fig.10 It is a schematic diagram of the welding mechanism structure of the present invention;

[0029] Fig.11 For the present invention Fig.10 A is a schematic diagram of the enlarged structure of the middle part;

[0030] Fig.12 It is a schematic diagram of the side cross-sectional structure of the welding mechanism of the present invention;

[0031] Fig.13 For the present invention Fig.12 Schematic diagram of the enlarged structure of B.

[0032] In the figure: 1, base; 2, electric slide rail; 3, auxiliary device; 4, moving mechanism; 5, supporting mechanism; 6, welding mechanism; 31, fixed slide rod; 32, slide groove; 33, sliding rod; 34, arc frame; 35, inclined groove; 36, slide rod; 41, hollow roller; 42, hollow sleeve rod; 43, limit ring; 44, spring; 45, two-way threaded rod; 46, threaded ring; 47, threaded sleeve; 48, Spline slide; 51, disc; 52, rotating rod; 53, telescopic spring; 54, spline rod; 55, sleeve rod; 56, connecting rod; 57, U-shaped rod; 58, arc plate; 59, arc groove; 61, driving motor; 62, gear; 63, arc slide; 64, annular ring; 65, limit arc groove; 66, gear ring; 67, knob; 68, teeth; 69, half gear; 610, welding machine body. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 13The present invention provides a technical solution: an automatic welding device for the inner core of a steel coil and a method for using the same, comprising a base 1, a surface of the base 1 is fixedly connected with an electric slide rail 2, a lower end of the electric slide rail 2 is fixedly connected with an auxiliary device 3, the auxiliary device 3 comprises a fixed slide rod 31, the fixed slide rod 31 is slidably connected inside the electric slide rail 2, a side of the fixed slide rod 31 is provided with a slide groove 32, a slide rod 33 is slidably connected inside the slide groove 32, the other end of the slide rod 33 is fixedly connected with an arc frame 34, the lower end of the electric slide rail 2 is provided with an inclined groove 35, and the side of the arc frame 34 is provided with an inclined groove 35. The surface is fixedly connected with a slide rod 36, which is slidably connected inside the inclined groove 35. The side of the fixed slide rod 31 is fixedly connected with a moving mechanism 4, and the side of the moving mechanism 4 is fixedly connected with a supporting mechanism 5. The surface of the base 1 is fixedly connected with a welding mechanism 6. When the arc frame 34 moves, it drives the slide rods 36 on both sides to move inside the inclined groove 35, and the arc frame 34 will drive the slide rod 33 to slide downward along the trajectory of the inclined groove 35 until it contacts the inner core of the steel coil, thereby forming internal and external supports, further ensuring the stability of the inner core of the steel coil during welding.

[0035] The moving mechanism 4 includes a hollow roller 41, which is fixedly connected to the side of the fixed sliding rod 31, and a hollow sleeve rod 42 is fixedly connected inside the hollow roller 41. The surface of the hollow sleeve rod 42 is slidably connected to a limit ring 43, and a spring 44 is arranged between the limit ring 43 and the inside of the hollow roller 41. A bidirectional threaded rod 45 is rotatably connected inside the hollow roller 41, and a threaded ring 46 is threadedly connected to the surface of one end of the bidirectional threaded rod 45, and a threaded sleeve 47 is threadedly connected to the surface of the other end of the bidirectional threaded rod 45. A spline slide 48 is fixedly connected inside the hollow sleeve rod 42, and the upper end of the threaded ring 46 is fixedly connected to the limit ring 43, and the threaded sleeve 47 slides within the hollow sleeve rod 42 through the spline slide 48.

[0036] The support mechanism 5 includes a disc 51, which is fixedly connected to one end of the hollow sleeve rod 42 through a support rod. An arc groove 59 is provided on the surface of the disc 51. A rotating rod 52 is rotatably connected to the surface of the disc 51. A telescopic spring 53 is arranged inside the rotating rod 52. A spline rod 54 is slidably connected to the inside of the rotating rod 52. A sleeve rod 55 is fixedly connected to the other end of the spline rod 54. A connecting rod 56 is hinged on the surface of the sleeve rod 55. A U-shaped rod 57 is slidably connected to the inside of the arc groove 59. The other end of the U-shaped rod 57 is fixedly connected to an arc plate 58. The other end of the connecting rod 56 is hinged to the arc plate 58. The sleeve rod 55 is slidably connected to the surface of the disc 51 through the spline rod 54. The spline rod 54 drives the rotating rod 52 to rotate on the surface of the disc 51. When the arc plate 58 expands in an arc shape, it expands inside the inner core of the steel coil, which can support the inner core of the steel coil to prevent the edge of the inner core of the steel coil from being uneven, which makes it difficult to overlap during welding and affects the quality of welding. At the same time, it can also support the edge of the inner core of the steel coil that needs to be welded to maintain stability during welding.

[0037] The welding mechanism 6 includes a driving motor 61, which is fixedly connected to the surface of the base 1, one end of the output shaft of the driving motor 61 is fixedly connected to a gear 62, the base 1 is fixedly connected to an arcuate slot 63, the inner rotation of the arcuate slot 63 is connected to an annular ring 64, the surface of the annular ring 64 is provided with a limited arcuate slot 65, the inner rotation of the annular ring 64 is connected to a gear ring 66, the surface of the gear ring 66 is fixedly connected to a knob 67, the inner ring of the gear ring 66 is fixedly connected to teeth 68, and the inner rotation of the annular ring 64 is connected to a half gear 69. The lower end of the half gear 69 is fixedly connected to the welding machine body 610, the gear 62 is meshed with the gear ring 66, the knob 67 is slidably connected inside the limiting arc groove 65, the tooth 68 is meshed with the half gear 69, and rotates inside the arc groove 63 through the annular ring 64, while driving the welding machine body 610 to perform annular welding on the two steel coil inner cores. In this way, the welding machine body 610 can be driven to contact the steel coil inner core when welding is required, which not only ensures the welding efficiency, but also improves the safety and protects the welding machine body 610.

[0038] The use method and advantages of the present invention: The automatic welding device for the inner core of a steel coil and the use method thereof, when in use, the working process is as follows:

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 As shown;

[0040] A method for using a steel coil inner core automatic welding device comprises the following steps:

[0041] S1. First, the two steel coil cores are sleeved on the surface of the hollow sleeve rod 42, and then the electric slide rail 2 is started. The electric slide rail 2 drives the two fixed slide rods 31 to move inward. When the fixed slide rod 31 moves, it drives the hollow roller 41 on the side and the hollow sleeve rod 42 in the hollow roller 41 to move inward at the same time. The two hollow sleeve rods 42 drive the steel coil cores on the surface to move at the same time. When the ends of the two steel coil cores are attached to each other, the fixed slide rod 31 continues to move a distance, and at the same time, the other end of the steel coil core will enter the interior of the hollow roller 41. At this time, the steel coil core will be in a relatively static state. The limiting ring 43 is relatively squeezed, and when being squeezed, the limiting ring 43 moves backward inside the hollow sleeve rod 42, and at the same time, the limiting ring 43 is limited by the hollow sleeve rod 42 and can only move backward. When the limiting ring 43 moves backward, the threaded ring 46 at the lower end is driven to move at the same time, and the threaded ring 46 moves on the surface of the bidirectional threaded rod 45, and at the same time drives the bidirectional threaded rod 45 to rotate. When the bidirectional threaded rod 45 rotates, it drives the threaded sleeve 47 at the other end to move forward, and the threaded sleeve 47 is limited by the spline slideway 48.

[0042] S2, the threaded sleeve 47 moves inside the hollow sleeve rod 42 to the place where the two steel ring inner cores contact, and at the same time, the threaded sleeve 47 squeezes the sleeve rod 55. When the sleeve rod 55 is squeezed, it drives the spline rod 54 to slide downward inside the rotating rod 52. When the sleeve rod 55 moves downward, it squeezes the connecting rod 56. When the connecting rod 56 is squeezed, it squeezes the arc plate 58 at the other end. When the arc plate 58 is squeezed, it drives the U-shaped rod 57 to move in an arc inside the arc groove 59 and expands on the edge of the disc 51. When the arc plate 58 drives the connecting rod 56 to move in an arc, it drives the sleeve rod 55 to drive the rotating rod 52 to rotate on the surface of the disc 51 through the spline rod 54. When the arc plate 58 expands in an arc, it expands inside the inner core of the steel coil, which can support the inner core of the steel coil to prevent the edge of the inner core of the steel coil from being uneven, which makes it difficult to overlap during welding and affects the quality of welding. At the same time, the edge of the inner core of the steel coil that needs to be welded can be supported to maintain stability during welding.

[0043] S3, when the inner cores of the two steel coils are relatively close to each other, the electric slide rail 2 is stopped, and the drive motor 61 is started. The drive motor 61 drives the gear 62 to rotate. When the gear 62 rotates, it drives the meshing ring gear 66 to rotate inside the annular ring 64 first, and at the same time, the ring gear 66 drives the knob 67 to slide inside the limiting arc groove 65. When the ring gear 66 rotates inside the annular ring 64, it drives the teeth 68 to move, and the teeth 68 drives the meshing half gear 69 to rotate. When the half gear 69 rotates, it drives the welding machine body 610 to be straightened and vertically downward. At this time, the gear 62 continues to drive The meshed gear ring 66 rotates, and at this time the gear ring 66 is limited by the limit arc groove 65 through the knob 67, driving the entire annular ring 64 to rotate inside the arc groove 63, and at the same time driving the welding machine body 610 to perform annular welding on the two steel coil inner cores, so that the welding machine body 610 can be driven to contact the steel coil inner core when welding is required, which not only ensures the welding efficiency, but also improves the safety and protects the welding machine body 610. After the welding is completed, the knob 67 is manually turned to reset, and the welding machine body 610 will continue to be in an inclined state;

[0044] S4. When the electric slide rail 2 drives the fixed slide rod 31 to move relatively, it also drives the slide rod 33 connected to the side of the fixed slide rod 31 to move simultaneously. The slide rod 33 drives the arc frame 34 to move simultaneously. When the arc frame 34 moves, it drives the slide rods 36 on both sides to move inside the inclined groove 35. The arc frame 34 will drive the slide rod 33 to slide downward along the trajectory of the inclined groove 35 until it contacts the inner core of the steel coil. This will form internal and external supports, further ensuring the stability of the inner core of the steel coil during welding.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic welding device for the inner core of a steel coil, comprising a base (1), characterized in that: The surface of the base (1) is fixedly connected to an electric slide rail (2), the lower end of the electric slide rail (2) is fixedly connected to an auxiliary device (3), the auxiliary device (3) comprises a fixed slide rod (31), the fixed slide rod (31) is slidably connected inside the electric slide rail (2), a slide groove (32) is provided on the side of the fixed slide rod (31), a slide rod (33) is slidably connected inside the slide groove (32), the other end of the slide rod (33) is fixedly connected to an arc frame (34), the lower end of the electric slide rail (2) is provided with an inclined groove (35), the side of the arc frame (34) is fixedly connected to a slide rod (36), the slide rod (36) is slidably connected inside the inclined groove (35), the side of the fixed slide rod (31) is fixedly connected to a moving mechanism (4), the side of the moving mechanism (4) is fixedly connected to a supporting mechanism (5), and the surface of the base (1) is fixedly connected to a welding mechanism (6); The moving mechanism (4) comprises a hollow roller (41), wherein the hollow roller (41) is fixedly connected to a side surface of a fixed sliding rod (31), a hollow sleeve rod (42) is fixedly connected inside the hollow roller (41), a limit ring (43) is slidably connected to the surface of the hollow sleeve rod (42), a spring (44) is provided between the limit ring (43) and the inside of the hollow roller (41), a bidirectional threaded rod (45) is rotatably connected inside the hollow roller (41), a threaded ring (46) is threadedly connected to the surface of one end of the bidirectional threaded rod (45), a threaded sleeve (47) is threadedly connected to the surface of the other end of the bidirectional threaded rod (45), and a spline slideway (48) is fixedly connected to the inside of the hollow sleeve rod (42); The support mechanism (5) comprises a disk (51), the disk (51) being fixedly connected to one end of a hollow sleeve rod (42) via a support rod, an arc-shaped groove (59) being provided on the circumference of the surface of the disk (51), a rotating rod (52) being rotatably connected to the surface of the disk (51), a telescopic spring (53) being provided inside the rotating rod (52), a spline rod (54) being slidably connected to the inside of the rotating rod (52), a sleeve rod (55) being fixedly connected to the other end of the spline rod (54), a connecting rod (56) being hingedly connected to the surface of the sleeve rod (55), a U-shaped rod (57) being slidably connected to the inside of the arc-shaped groove (59), and a curved plate (58) being fixedly connected to the other end of the U-shaped rod (57); The welding mechanism (6) comprises a driving motor (61), wherein the driving motor (61) is fixedly connected to the surface of the base (1), one end of the output shaft of the driving motor (61) is fixedly connected to a gear (62), the base (1) is fixedly connected to an arcuate slide groove (63), the interior of the arcuate slide groove (63) is rotatably connected to an annular ring (64), the surface of the annular ring (64) is provided with a limited arcuate groove (65), the interior of the annular ring (64) is rotatably connected to a gear ring (66), the surface of the gear ring (66) is fixedly connected to a knob (67), the inner ring of the gear ring (66) is fixedly connected to teeth (68), the interior of the annular ring (64) is rotatably connected to a half gear (69), and the lower end of the half gear (69) is fixedly connected to a welding machine body (610).

2. The automatic welding device for the inner core of a steel coil according to claim 1, characterized in that: The upper end of the threaded ring (46) is fixedly connected to the limiting ring (43), and the threaded sleeve (47) slides within the hollow sleeve rod (42) via a spline slideway (48).

3. The automatic welding device for the inner core of a steel coil according to claim 1, characterized in that: The other end of the connecting rod (56) is hinged to the arc-shaped plate (58), and the sleeve rod (55) is slidably connected to the surface of the disc (51) via a spline rod (54).

4. The automatic welding device for the inner core of a steel coil according to claim 1, characterized in that: The gear (62) meshes with the gear ring (66), the knob (67) is slidably connected inside the limiting arc groove (65), and the teeth (68) mesh with the half gear (69).

5. A method for using the automatic welding device for inner core of a steel coil according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. First, the inner cores of the two steel coils are sleeved on the surface of the hollow sleeve rod (42), and then the electric slide rail (2) is started. The electric slide rail (2) drives the two fixed slide rods (31) to move inward. When the fixed slide rod (31) moves, it drives the hollow roller (41) on the side and the hollow sleeve rod (42) inside the hollow roller (41) to move inward at the same time. The two hollow sleeve rods (42) drive the inner cores of the steel coils on the surface to move at the same time. When the ends of the two inner cores of the steel coils are attached to each other, the fixed slide rod (31) continues to move a certain distance, and at the same time, the other end of the inner core of the steel coil enters the interior of the hollow roller (41). At this time, the inner core of the steel coil is in a relatively static state. At the same time, the limiting ring (43) on the surface of the hollow sleeve rod (42) is squeezed, and the limiting ring (43) is relatively squeezed. When the limiting ring (43) is squeezed, it moves backward inside the hollow sleeve rod (42). At the same time, the limiting ring (43) is limited by the hollow sleeve rod (42) and can only move backward. When the limiting ring (43) moves backward, it drives the threaded ring (46) at the lower end to move at the same time. The threaded ring (46) moves on the surface of the bidirectional threaded rod (45), and drives the bidirectional threaded rod (45) to rotate. When the bidirectional threaded rod (45) rotates, it drives the threaded sleeve (47) at the other end to move forward, and the threaded sleeve (47) is limited by the spline slideway (48); S2, the threaded sleeve (47) moves inside the hollow sleeve rod (42) toward the place where the two steel ring inner cores contact, and at the same time, the threaded sleeve (47) squeezes the sleeve rod (55). When the sleeve rod (55) is squeezed, the spline rod (54) is driven to slide downward inside the rotating rod (52). When the sleeve rod (55) moves downward, it squeezes the connecting rod (56). When the connecting rod (56) is squeezed, it squeezes the arc plate (58) at the other end. When the arc plate (58) is squeezed, it drives the U-shaped rod (57) to move in an arc shape inside the arc groove (59) and expands on the edge of the disc (51). When the arc plate (58) drives the connecting rod (56) to move in an arc shape, it drives the sleeve rod (55) to drive the rotating rod (52) to rotate on the surface of the disc (51) through the spline rod (54). When the arc plate (58) expands in an arc shape, it expands inside the steel coil inner core, so that the steel coil inner core can be supported and the edge of the steel coil inner core that needs to be welded can also be supported. S3. When the inner cores of the two steel coils are relatively close to each other, the electric slide rail (2) is stopped and the drive motor (61) is started. The drive motor (61) drives the gear (62) to rotate. When the gear (62) rotates, it drives the meshing ring gear (66) to rotate inside the annular ring (64). At the same time, the ring gear (66) drives the knob (67) to slide inside the limiting arc groove (65). When the ring gear (66) rotates inside the annular ring (64), it drives the teeth (68) to move. The teeth (68) drives the meshing half gear (69) to rotate. When the half gear (69) rotates, it drives the welding machine body (610) to align. and vertically downward, at which time the gear (62) continues to drive the meshing gear ring (66) to rotate, and at this time the gear ring (66) is limited by the limiting arc groove (65) through the knob (67), driving the entire annular ring (64) to rotate inside the arc groove (63), and at the same time driving the welding machine body (610) to perform annular welding on the two steel coil inner cores, so that when welding is required, the welding machine body (610) can be driven to contact the steel coil inner core, thereby protecting the welding machine body (610). After welding is completed, the knob (67) is manually turned to reset, and the welding machine body (610) will continue to be in an inclined state; S4. When the electric slide rail (2) drives the fixed slide bar (31) to move relative to each other, it also drives the slide bar (33) connected to the side of the fixed slide bar (31) to move simultaneously. The slide bar (33) drives the arc frame (34) to move simultaneously. When the arc frame (34) moves, it drives the slide bars (36) on both sides to move inside the inclined groove (35). The arc frame (34) drives the slide bar (33) to slide downward along the track of the inclined groove (35) until it contacts the inner core of the steel coil, thereby forming internal and external supports.

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