Steel coil threading equipment

Abstract

The present invention relates to a steel coil threading device, comprising a base; a support frame is fixedly connected to the base; the support frame is rotatably connected to a first transmission roller; the support frame is fixedly connected to a first motor; the output end of the first motor is fixedly connected to the first transmission roller; a conveyor belt is transmission-connected between the first rotating rollers; the base is fixedly connected to a box support leg; the box support leg is fixedly connected to the box; the conveyor belt is slidably connected to the box; a connecting plate is fixedly connected to the support frame; the support frame is fixedly connected to a cylinder fixing plate; the cylinder fixing plate is fixedly connected to a first cylinder; the output end of the first cylinder is fixedly connected to a movable plate; the connecting plate is slidably connected to a striking hammer; one end of the striking hammer is rotatably connected to the movable plate; after welding is completed, multiple strikes are performed on both sides of the weld seam to test the weld seam, thereby reducing the situation of belt breakage caused by loose welding.

Description

Technical Field

[0001] The present invention relates to the technical field of steel coils, in particular to a steel coil threading device. Background Art

[0002] In order to facilitate transportation, strip steel is rolled into coils. However, during processing, the strip steel needs to be processed through a pickling mill. The pickling mill is a type of equipment used to produce metal sheets. The strip steel is pickled, rolled, lubricated, annealed, flattened, sheared, and packaged before leaving the factory.

[0003] The pickling mill must be threaded after each shutdown, and the belt may break during threading. Because the machine is also in the starting state during threading, once a belt breaks, it will be dangerous. At the very least, the equipment will be damaged and need to be repaired or replaced. At worst, it may cause a fire or personal injury, which is a huge loss for the operator and the company. Therefore, avoiding belt breakage is a very important thing and it is also something that manufacturers pay great attention to. In the existing technology, the operator monitors the equipment in real time to avoid belt breakage.

[0004] However, it is inevitable that the operator will not be able to supervise the work at all times. Once a strip breaks, it will pose a threat to the operator's personal safety. According to statistics, there are two main reasons for strip breakage. The first is the quality of the strip itself. The second is whether the quality of the strip welding is up to standard and whether the welds are firmly welded. To avoid the first problem, it is necessary to select a high-quality supply source and inspect the strip before operation. For the second problem, it is necessary to inspect the welding quality and test the welds. In the existing technology, after the strip is welded, the operator inspects the welds, but it is actually difficult to see whether the welds are firmly welded. Solving the two major reasons for strip breakage can greatly avoid the occurrence of strip breakage. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art of detecting the welding quality of the steel strip after welding to avoid causing the strip to break.

[0006] The transmission mechanism that this invention relates to is that this transmission mechanism is that the transmission mechanism that this invention relates to is that the present invention is a kind of transmission mechanism that this invention relates to. A first transmission mechanism is connected for transmission between the first transmission roller and the second transmission roller at the left end; the first transmission mechanism is located at the rear side of the support frame, and the first transmission mechanism is connected to the support frame; a second transmission mechanism is connected for transmission between the two second transmission rollers; the second transmission mechanism is located at the front side of the support frame; a connecting plate is fixedly connected to the support frame at the right end; the connecting plate is located on the right side of the first transmission roller at the right end; the support frame is fixedly connected to the cylinder fixing plate; the cylinder fixing plate is located on the right side of the connecting plate; the cylinder fixing plate is placed vertically; the right side of the cylinder fixing plate is fixedly connected to the first cylinder; the output end of the first cylinder is fixedly connected to the movable plate; the movable plate is located between the cylinder fixing plate and the connecting plate; the connecting plate is slidably connected to two sets of striking hammers; one end of the striking hammer is rotatably connected to the movable plate;

[0007] In one embodiment of the present invention, the first transmission mechanism includes gears; the support frame at the left end is rotatably connected to two gears; the two gears are fixedly connected to the first transmission roller and the second transmission roller respectively; the two gears are meshed and connected; the gears are located at the rear side of the support frame;

[0008] In one embodiment of the present invention, the second transmission mechanism includes a pulley; the support frame is rotatably connected to a pulley; the two pulleys are respectively fixedly connected to a second transmission roller; the two pulleys are located on the same side of the support frame; a belt is connected between the two pulleys;

[0009] In one embodiment of the present invention, negative pressure holes A are evenly distributed on the conveyor belt; two groups of negative pressure holes B are evenly distributed on the top and bottom of the box body; the two groups of negative pressure holes B are located at both ends of the box body; the interior of the box body is hollow; a negative pressure pipe is fixedly connected to the side wall of the box body; the negative pressure pipe is connected to an external air pump;

[0010] In one embodiment of the present invention, a welding mechanism is connected to the base; the welding mechanism is located above the base;

[0011] In one embodiment of the present invention, the welding mechanism includes a welding mobile frame; the welding mobile frame is slidably connected to the base; a second motor is fixedly connected to one side of the welding mobile frame; the second motor is located above the conveyor belt; the output end of the second motor is fixedly connected to a screw; the screw is located between the front wall and the rear wall of the welding mobile frame and is rotatably connected to the welding mobile frame; a slider is threadedly connected to the screw; the lower end of the slider is fixedly connected to a voice coil motor; the output end of the voice coil motor is fixedly connected to a welding gun; the welding gun is located above the conveyor belt;

[0012] In one embodiment of the present invention, a set of slide rails is provided on the base; a welding movable frame is slidably connected in the slide rails; two second cylinders are fixedly connected to the base; and the output ends of the two second cylinders are fixedly connected to the front and rear sides of the welding movable frame respectively;

[0013] In one embodiment of the present invention, the lower end of the welding movable frame is rotatably connected to a plurality of pulleys;

[0014] In one embodiment of the present invention, two sets of sliding rods are fixedly connected to the movable plate; the sliding rods are respectively located on both sides of the first cylinder; the sliding rods are slidably connected to the cylinder fixed plate;

[0015] In one embodiment of the present invention, a support plate is fixedly connected to the welding movable frame; a slide groove is provided on the support plate; both ends of the support plate are fixedly connected to the welding movable frame respectively; the slider is located above the support plate; the slider is slidably connected to the support plate; the upper end of the voice coil motor is located in the slide groove; and the voice coil motor is slidably connected to the support plate.

[0016] The above technical solution of the present invention has the following advantages over the prior art:

[0017] When the present invention is in operation, the operator performs welding on the conveyor belt, and the rear weld moves with the conveyor belt to the bend on the right side of the conveyor belt, and the steel coils on both sides of the weld are respectively located on the upper and lower layers of the conveyor belt; then the first cylinder is started; the first cylinder drives the striking hammer to move, so that the striking hammer strikes both sides of the weld seam for multiple times, and when the weld seam is intact after multiple strikes on both sides of the weld seam, the welding is qualified, and the next step can be continued; when the weld seam has gaps or breaks after multiple strikes on both sides of the weld seam, the welding is unqualified; the conveyor belt drives the strip steel to return to the top of the conveyor belt and weld again; after welding, the inspection is carried out again until the weld seam is intact after multiple strikes on both sides of the weld seam, and the welding is qualified, and then the next step can be entered; the situation of strip breakage due to poor welding quality in the subsequent process is reduced, and the chance of strip breakage is reduced;

[0018] During operation, start the external air pump, and the negative pressure pipe of the external air pump will form a negative pressure in the box; then negative pressure is applied to the strips on the left and right ends of the conveyor belt through the negative pressure hole B and the negative pressure hole A; so that the strips on both sides of the welding position are fixed, and the welding quality will not be affected by movement during welding; when the weld seam is inspected, if the hammer hits the strips on both sides of the weld seam to cause the strip to break, the conveyor belt will also negatively pressurize the two ends of the broken strip on the upper and lower layers of the conveyor belt; no danger will be caused; during operation, after aligning the two rolls of strip heads and placing them in the appropriate position, start the second cylinder to move the welding mobile frame to the appropriate position and then stop; start the second motor and the voice coil motor so that the welding gun can move while welding; the pulley can support and facilitate the movement of the welding mobile frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0021] Figure 2 A cross-sectional view of the main structure of an embodiment of the present invention;

[0022] Figure 3 A partial structural cross-sectional view of an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a partial structure of an embodiment of the present invention Figure 1 ;

[0024] Figure 5 A schematic diagram of a partial structure of an embodiment of the present invention Figure 2 ;

[0025] Figure 6 This is a schematic diagram of a welding mechanism according to an embodiment of the present invention.

[0026] Description of the accompanying drawings:

[0027] 1. Base; 2. Support frame; 3. First transmission roller; 4. First motor; 5. Conveyor belt; 6. Box legs; 7. Box; 8. Second transmission roller; 9. First transmission mechanism; 91. Gear; 10. Second transmission mechanism; 101. Pulley; 102. Belt; 11. Connecting plate; 12. Cylinder fixing plate; 13. First cylinder; 14. Moving plate; 15. Striking hammer; 16. Negative pressure hole A; 17. Negative pressure hole B; 18. Negative pressure pipe; 19. Welding mechanism; 191. Welding moving frame; 192. Second motor; 193. Screw; 194. Slider; 195. Voice coil motor; 196. Welding gun; 197. Slide rail; 198. Second cylinder; 199. Pulley; 20. Slide rod; 21. Support plate; 22. Slide groove. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0029] Reference Figures 1-6 As shown, a steel coil threading device includes a base 1;

[0030] The transmission mechanism 9 is connected with the transmission mechanism 1 of Figure 1, and the transmission mechanism 1 is connected with the transmission mechanism 1 of Figure 1. The structure 9 is connected to the support frame 2; a second transmission mechanism 10 is connected for transmission between the two second transmission rollers 8; the second transmission mechanism 10 is located on the front side of the support frame 2; a connecting plate 11 is fixedly connected to the support frame 2 at the right end; the connecting plate 11 is located on the right side of the first transmission roller 3 at the right end; the support frame 2 is fixedly connected to a cylinder fixing plate 12; the cylinder fixing plate 12 is located on the right side of the connecting plate 11; the cylinder fixing plate 12 is placed vertically; the right side of the cylinder fixing plate 12 is fixedly connected to a first cylinder 13; the output end of the first cylinder 13 is fixedly connected to a movable plate 14; the movable plate 14 is located between the cylinder fixing plate 12 and the connecting plate 11; the connecting plate 11 is slidably connected to two groups of striking hammers 15; one end of the striking hammer 15 is rotatably connected to the movable plate 14; two groups of sliding rods 20 are fixedly connected to the movable plate 14; the sliding rods 20 are respectively located on both sides of the first cylinder 13; the sliding rods 20 are slidably connected to the cylinder fixing plate 12;

[0031] During operation, the two steel coils to be welded are respectively installed on the winding and unwinding rotating rollers located at the left and right ends of the first transmission roller; the belt head of the steel coil on the right side passes from under the second transmission roller 8 on the right side, passes under the second transmission roller 8 on the left side, and goes around to the top of the second transmission roller 8 on the left side, and then passes over the top of the second transmission roller 8 on the right side and is placed on the top of the transmission belt 4 from the right side; the belt head of the steel coil on the left side is placed on the top of the conveyor belt 5 from the left side; the belt heads of the two steel coils are welded on the conveyor belt 5; after welding is completed, start the first motor 4; the first motor 4 drives the conveyor belt 5 to rotate through the first transmission roller 3; the welding position is rotated to the right end of the transmission belt, and the welding seam is now located at the bending position of the right end of the conveyor belt; the steel coils on both sides of the welding seam are respectively located on the conveyor belt 5; then start the first cylinder 13; the first cylinder 13 drives the movable plate 14 to move; the movable plate 14 drives the striking hammer 15 to move, so that the striking hammer strikes both sides of the welding seam multiple times. When the welding seam is intact after multiple strikes on both sides of the welding seam, the welding is qualified; the next step can be continued; when the welding seam is notched or broken after multiple strikes on both sides of the welding seam, the welding is unqualified; the conveyor belt 5 drives the strip steel back to the top of the conveyor belt 5 and welded again; after welding, it is tested again until the welding seam is intact after multiple strikes on both sides of the welding seam, and the welding is qualified, and then the next step can be entered; the box body 7 is located between the upper and lower conveyor belts 5 and contacts the conveyor belt 5. It can play a supporting role during electric welding to complete the welding;

[0032] In one embodiment of the present invention, the first transmission mechanism 9 includes a gear 91; two gears 91 are rotatably connected to the support frame 2 at the left end; the two gears 91 are fixedly connected to the first transmission roller 3 and the second transmission roller 8 respectively; the two gears 91 are meshed and connected; the gears 91 are located on the rear side of the support frame 2;

[0033] Through the gear 91, when the first motor 4 is started, the first transmission roller 3 and the second transmission roller 8 can rotate simultaneously, and the rotation directions are opposite. This can achieve that when the conveyor belt 5 drives the strip to move to the right, the strip in contact with the upper end of the second transmission roller 8 moves to the left, and the strip in contact with the lower end of the second transmission roller 8 moves to the right. In conjunction with the winding and unwinding rotating rollers installed on the left and right sides of the steel coil, the strip is always kept at an appropriate tension during operation.

[0034] The second transmission mechanism 10 includes a pulley 101; the support frame 2 is rotatably connected to the pulley 101; the two pulleys 101 are respectively fixedly connected to a second transmission roller 8; the two pulleys 101 are located on the same side of the support frame 2; a belt 102 is connected between the two pulleys 101;

[0035] During operation, through the pulley 101 and the belt 102, when the first motor 4 is started, the two second transmission rollers 8 can rotate simultaneously and in the same direction; cooperate with the conveyor belt 5 to transmit the strip steel;

[0036] Negative pressure holes A16 are evenly distributed on the conveyor belt 5; two groups of negative pressure holes B17 are evenly distributed on the top and bottom of the box body 7; the two groups of negative pressure holes B17 are located at both ends of the box body 7; the interior of the box body 7 is hollow; a negative pressure pipe 18 is fixedly connected to the side wall of the box body 7; the negative pressure pipe 18 is connected to an external air pump;

[0037] During operation, the operator places the strip heads of two steel coils on the welding position of the box 5 without the negative pressure hole B17; after aligning the positions of the two strip heads, the operator starts the external air pump, and the negative pressure pipe 18 of the external air pump forms a negative pressure in the box 7; then the negative pressure is applied to the strips on the left and right ends of the conveyor belt through the negative pressure hole B17 and the negative pressure hole A16; so that the strips on both sides of the welding position are fixed, and the welding quality will not be affected by movement during welding; when the weld seam is inspected, if the hammer 15 hits the strips on both sides of the weld seam to cause the strips to break, the conveyor belt 5 will also negatively pressurize the two ends of the broken strips to the upper and lower layers of the conveyor belt 5; no danger will be caused;

[0038] The base 1 is connected to a welding mechanism 19; the welding mechanism 19 is located above the base 1;

[0039] The welding mechanism 19 includes a welding movable frame 191; the welding movable frame 191 is slidably connected to the base 1; a second motor 192 is fixedly connected to one side of the welding movable frame 191; the second motor 192 is located above the conveyor belt 5; the output end of the second motor 192 is fixedly connected to a screw rod 193; the screw rod 193 is located between the front wall and the rear wall of the welding movable frame 191, and the screw rod 193 is rotatably connected to the welding movable frame 191; a slider 194 is threadedly connected to the screw rod 193; the lower end of the slider 194 is fixedly connected to a voice coil motor 195; the output end of the voice coil motor 195 is fixedly connected to a welding gun 196; the welding gun 196 is located above the conveyor belt 5;

[0040] The base 1 is provided with a set of slide rails 197; a welding mobile frame 191 is slidably connected in the slide rails 197; two second cylinders 198 are fixedly connected to the base 1; the output ends of the two second cylinders 198 are respectively fixedly connected to the front and rear sides of the welding mobile frame 191; a plurality of pulleys 199 are rotatably connected to the lower end of the welding mobile frame 191; a support plate 21 is fixedly connected to the welding mobile frame 191; a slide groove 22 is provided on the support plate 21; both ends of the support plate 21 are respectively fixedly connected to the welding mobile frame 191; the slider 194 is located above the support plate 21; the slider 194 is slidably connected to the support plate 21; the upper end of the voice coil motor 195 is located in the slide groove 22; the voice coil motor 195 is slidably connected to the support plate 21;

[0041] During operation, after aligning the two roll heads and placing them in the appropriate position, start the second cylinder 198 to move the welding movable frame 191 to the appropriate position and then stop; start the second motor 192 and the voice coil motor 195 so that the welding gun can move while welding; the pulley 199 can support and facilitate the movement of the welding movable frame 191.

[0042] Working principle:

[0043] During operation, the two steel coils to be welded are respectively installed on the winding and unwinding rotating rollers located at the left and right ends of the first transmission roller; the belt head of the steel coil on the right side passes from under the second transmission roller 8 on the right side, passes under the second transmission roller 8 on the left side, and then goes over the second transmission roller 8 on the left side, and then passes over the second transmission roller 8 on the right side and is placed over the transmission belt 4 from the right side; the belt head of the steel coil on the left side is placed over the conveyor belt 5 from the left side; the belt heads of the two steel coils are welded on the conveyor belt 5; after welding is completed, the first motor 4 is started; the first motor 4 drives the conveyor belt 5 to rotate through the first transmission roller 3; so that the welding position is rotated To the right end of the transmission belt, the welding seam is located at the bending position of the right end of the conveyor belt; the steel coils on both sides of the welding seam are respectively located on the upper and lower layers of the conveyor belt 5; then the first cylinder 13 is started; the first cylinder 13 drives the movable plate 14 to move; the movable plate 14 drives the striking hammer 15 to move, so that the striking hammer strikes both sides of the welding seam for multiple times. When the welding seam is intact after multiple strikes on both sides of the welding seam, the welding is qualified; the next step can be continued; when the welding seam is notched or broken after multiple strikes on both sides of the welding seam, the welding is unqualified; the conveyor belt 5 drives the strip steel back to the top of the conveyor belt 5 and welds again; welding is completed Then it is tested again until both sides of the welding seam are hit several times and the welding seam is intact. After the welding is qualified, it enters the next process; the box body 7 is located between the upper and lower conveyor belts 5 and contacts the conveyor belt 5. It can play a supporting role during electric welding to complete the welding; when working, the operator puts the heads of the two steel coils on the welding position of the box body 5 without the negative pressure hole B17; after aligning the positions of the two heads of the steel coils, start the external air pump, and the external air pump negative pressure pipe 18 will form a negative pressure in the box body 7; then negative pressure is applied to the strip steels at the left and right ends of the conveyor belt through the negative pressure hole B17 and the negative pressure hole A16; so that the strip steels on both sides of the welding position are fixed, and then The welding quality will not be affected by the movement during welding; when the welding seam is inspected, if the hammer 15 hits the strip steel on both sides of the welding seam to cause the strip to break, the conveyor belt 5 will also put negative pressure on the two ends of the broken strip steel on the upper and lower layers of the conveyor belt 5; it will not cause danger; when working, after the two rolls of strip heads are aligned and placed in the appropriate position, the second cylinder 198 is started to move the welding mobile frame 191 to the appropriate position and then stop; the second motor 192 and the voice coil motor 195 are started so that the welding gun can move while welding; the pulley 199 can support and facilitate the movement of the welding mobile frame 191.

[0044] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A steel coil threading device, characterized by: The invention comprises a base (1); two groups of support frames (2) are fixedly connected to the base (1); a first transmission roller (3) is rotatably connected between each group of support frames (2); a first motor (4) is fixedly connected to the front side of the left end support frame (2); an output end of the first motor (4) is fixedly connected to one of the first transmission rollers (3); a conveyor belt (5) is transmission-connected between the first transmission rollers (3); two groups of box legs (6) are fixedly connected to the base (1); the box legs (6) are respectively located at The front and rear sides of the conveyor belt (5); the box legs (6) are fixedly connected to the box (7); the box (7) is located between the two first transmission rollers (3) and between the upper and lower layers of the conveyor belt (5); the conveyor belt (5) is in contact and sliding connection with the box (7); a second transmission roller (8) is rotatably connected between each group of the support frames (2); the second transmission roller (8) is located below the first transmission roller (3); a first transmission roller (3) at the left end is in transmission connection with the second transmission roller (8) at the left end. A transmission mechanism (9); the first transmission mechanism (9) is located at the rear side of the support frame (2), and the first transmission mechanism (9) is connected to the support frame (2); a second transmission mechanism (10) is connected between the two second transmission rollers (8); the second transmission mechanism (10) is located at the front side of the support frame (2); a connecting plate (11) is fixedly connected to the support frame (2) at the right end; the connecting plate (11) is located on the right side of the first transmission roller (3) at the right end; a cylinder fixing plate (12) is fixedly connected to the support frame (2) ); the cylinder fixing plate (12) is located on the right side of the connecting plate (11); the cylinder fixing plate (12) is placed vertically; the right side of the cylinder fixing plate (12) is fixedly connected to the first cylinder (13); the output end of the first cylinder (13) is fixedly connected to the movable plate (14); the movable plate (14) is located between the cylinder fixing plate (12) and the connecting plate (11); the connecting plate (11) is slidably connected to two groups of striking hammers (15); one end of the striking hammer (15) is rotatably connected to the movable plate (14); The first transmission mechanism (9) includes a gear (91); two gears (91) are rotatably connected to the support frame (2) at the left end; the two gears (91) are fixedly connected to the first transmission roller (3) and the second transmission roller (8) respectively; the two gears (91) are meshed and connected; the gears (91) are located at the rear side of the support frame (2); The second transmission mechanism (10) includes a pulley (101); the support frame (2) is rotatably connected to a pulley (101); the two pulleys (101) are respectively fixedly connected to a second transmission roller (8); the two pulleys (101) are located on the same side of the support frame (2); a belt (102) is connected between the two pulleys (101); Negative pressure holes A (16) are evenly provided on the conveyor belt (5); two groups of negative pressure holes B (17) are evenly provided on the top and bottom of the box body (7); the two groups of negative pressure holes B (17) are respectively located at the two ends of the box body (7); the interior of the box body (7) is hollow; a negative pressure pipe (18) is fixedly connected to the side wall of the box body (7); the negative pressure pipe (18) is connected to an external air pump; A welding mechanism (19) is connected to the base (1); the welding mechanism (19) is located above the base (1); After the welding is completed, the first motor (4) is started, and the first motor (4) drives the conveyor belt (5) to rotate through the first transmission roller (3); the welding position is rotated to the right end of the transmission belt, and the welding seam is located at the bending position of the right end of the conveyor belt; the steel coils on both sides of the welding seam are respectively located on the upper layer and the lower layer of the conveyor belt (5); then the first cylinder (13) is started; the first cylinder (13) drives the movable plate (14) to move; the movable plate (14) drives the striking hammer (15) to move, so that the striking hammer strikes both sides of the welding seam. If the welding seam is intact, the welding is qualified; the next step is continued; if the welding seam has a notch or a break, the welding is unqualified; the conveyor belt (5) drives the strip steel to rotate back to the top of the conveyor belt (5) and welding is performed again; after the welding is completed, the welding is tested again until the welding is qualified.

2. The steel coil threading device according to claim 1, characterized in that: The welding mechanism (19) comprises a welding movable frame (191); the welding movable frame (191) is slidably connected to the base (1); a second motor (192) is fixedly connected to one side of the welding movable frame (191); the second motor (192) is located above the conveyor belt (5); the output end of the second motor (192) is fixedly connected to a screw rod (193); the screw rod (193) is located between the front wall and the rear wall of the welding movable frame (191), and the screw rod (193) is rotatably connected to the welding movable frame (191); a slider (194) is threadedly connected to the screw rod (193); the lower end of the slider (194) is fixedly connected to a voice coil motor (195); the output end of the voice coil motor (195) is fixedly connected to a welding gun (196); the welding gun (196) is located above the conveyor belt (5).

3. The steel coil threading device according to claim 2, characterized in that: The base (1) is provided with a set of slide rails (197); a welding movable frame (191) is slidably connected in the slide rails (197); two second cylinders (198) are fixedly connected to the base (1); the output ends of the two second cylinders (198) are fixedly connected to the front side and the rear side of the welding movable frame (191), respectively.

4. The steel coil threading device according to claim 3, characterized in that: The lower end of the welding movable frame (191) is rotatably connected to a plurality of pulleys (199).

5. The steel coil threading device according to claim 4, characterized in that: Two groups of sliding rods (20) are fixedly connected to the movable plate (14); the sliding rods (20) are respectively located on both sides of the first cylinder (13); and the sliding rods (20) are slidably connected to the cylinder fixed plate (12).

6. The steel coil threading device according to claim 5, characterized in that: The welding movable frame (191) is fixedly connected to a support plate (21); a slide groove (22) is provided on the support plate (21); both ends of the support plate (21) are fixedly connected to the welding movable frame (191); the slider (194) is located above the support plate (21); the slider (194) is slidably connected to the support plate (21); the upper end of the voice coil motor (195) is located in the slide groove (22); and the voice coil motor (195) is slidably connected to the support plate (21).

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