A slitting machine with automatic threading function

Abstract

This invention relates to a slitting machine with an automatic strip-threading function, comprising a base and a support platform fixedly mounted on top of the base. The slitting machine body is fixedly mounted on the top of the base away from the support platform. A blower mechanism for cleaning the metal strip is provided on the top of the support platform near the slitting machine body. A guide mechanism for assisting the strip threading is provided on the support platform on one side of the blower mechanism. By controlling the extension end of the hydraulic cylinder to extend to its maximum length, the lifting seat rises to a set position. At this time, the end of the metal strip corresponds to the position between the first and second pinch rollers. During this process, two feeding blocks and several rolling rollers facilitate the driving of the end of the metal strip into the space between the first and second pinch rollers, reducing the difficulty of threading the strip due to its high hardness. Guide rollers inside two fixed frames guide the strip to prevent it from deviating.

Description

Technical Field

[0001] This invention relates to the field of slitting machine technology, specifically a slitting machine with automatic threading function. Background Technology

[0002] A slitting machine, also known as a slitting line, slitting machine, or stripping machine, is a key piece of equipment in the metal processing industry used to cut and slit metal coils along their length. Its core function is to cut wide metal coils into narrow strips of the required width.

[0003] The threading process of the slitting machine is a key step in the slitting of metal coils. Its core purpose is to guide the uncoiled strip smoothly and accurately into the shearing zone, providing a stable foundation for subsequent slitting operations.

[0004] In the existing slitting machine, due to the high hardness of the metal strip, it is difficult to guide the metal strip between the two operating pinch rollers during the threading operation. The metal strip is also prone to deviation, resulting in excessive cutting width or incomplete separation of waste edges. At the same time, during the slitting process, the surface of the uncoiled metal strip will be covered with hard impurities such as dust, which can easily affect the accuracy of slitting the metal strip. Summary of the Invention

[0005] The technical problem solved by this solution is:

[0006] (1) How to solve the problem that due to the high hardness of the metal strip, it is inconvenient to guide the metal strip between the two running pinch rollers, and the metal strip is prone to deviation, resulting in excessive shearing width or incomplete separation of waste edge.

[0007] (2) How to solve the problem that hard impurities such as dust will adhere to the surface of the uncoiled metal strip during the longitudinal cutting process, which can easily affect the accuracy of longitudinal cutting of the metal strip.

[0008] The objective of this invention can be achieved through the following technical solution: including a base and a support platform fixedly installed on its top, a slitting machine body is fixedly installed on the top of the base away from the support platform, a blower mechanism for cleaning metal strip is provided on the top of the support platform near the slitting machine body, and a guide mechanism for assisting in threading metal strip is provided on the support platform on one side of the blower mechanism.

[0009] The guiding mechanism includes a guide cover fixedly connected to a support platform. A longitudinally arranged hydraulic cylinder is fixedly installed on the support platform below the guide cover. A lifting seat is fixedly installed at the extended end of the hydraulic cylinder. A groove is formed on the top of the lifting seat. Several rolling rollers for conveying metal strip are rotatably arranged inside the groove. The lifting seat is slidably connected to the inner wall of the guide cover through a first guide rail. The rolling rollers are rotatably connected to the inner wall of the groove through deep groove ball bearings. The deep groove ball bearings can withstand a large radial load, ensuring the flexibility and stability of the rolling roller rotation, thereby improving the accuracy of the rolling rollers conveying metal strip. It can accurately guide the end of the metal strip to the space between the first pinch roller and the second pinch roller, reducing the difficulty of threading the strip due to its high hardness and improving the threading efficiency.

[0010] A further technical improvement of the present invention is that: four mounting seats are fixedly connected to the top of the inner wall of the guide cover, and two rotating rods are rotatably arranged between two corresponding mounting seats via a rotating shaft, and a feeding block is fixedly arranged between the two rotating rods.

[0011] A further technical improvement of the present invention is that a transmission plate is hinged between the two rotating rods away from the first guide rail, and a fixing plate is fixedly connected to the top of the inner wall of the guide cover. A tension spring is fixedly connected between the fixing plate and one of the rotating rods, and the fixing plate is located away from the slitting machine body.

[0012] A further technical improvement of the present invention is that: the blower mechanism includes a movable frame, an upper moving plate is disposed inside the movable frame, a plurality of first nozzles are fixedly installed at the bottom of the upper moving plate, the plurality of first nozzles are arranged at equal intervals, and longitudinally arranged guide rods are fixedly installed at the four corners of the top of the upper moving plate, the top ends of the guide rods movably penetrating through the top of the movable frame; wherein, the four guide rods provide guidance for the movement of the upper moving plate to ensure its smooth lifting and lowering, and a sealing ring is provided at the point where the guide rods movably penetrate the top of the movable frame to prevent dust and other impurities from entering the interior of the movable frame; at the same time, grease is applied to the contact parts between the guide rods and the movable frame to reduce friction and ensure the flexibility of the upper moving plate's lifting and lowering.

[0013] A further technical improvement of the present invention is that a first cylinder arranged longitudinally is fixedly installed on the top of the movable frame, the protruding end of the first cylinder movably passes through the top of the movable frame and is fixedly connected to the upper moving plate.

[0014] A further technical improvement of the present invention is as follows: the inner wall of the movable frame is slidably connected to the lifting platform via two second guide rails; a counterweight is fixedly installed at the bottom of the lifting platform; a horizontally arranged downward moving plate is fixedly installed on the lifting platform; a plurality of second nozzles are fixedly installed at the top of the downward moving plate; the positions of the plurality of second nozzles correspond to the positions of a plurality of first nozzles; the input ends of the plurality of first and second nozzles are all connected to an external air supply device via hoses; wherein, the second guide rail adopts a linear guide rail structure, and the material is high-strength stainless steel, which has the characteristics of wear resistance and corrosion resistance; the lifting platform is fixedly connected to the slider of the second guide rail by bolts to ensure that the lifting platform can slide smoothly along the second guide rail; the function of the counterweight is to keep the lifting platform balanced by its own weight when the upward moving plate moves the first nozzles downward, and to prevent the lifting platform from tilting due to the force generated by the downward movement of the upward moving plate.

[0015] A further technical improvement of the present invention is that: guide sleeves are fixedly installed on the inner walls of the movable frames on both sides of the lifting platform, and a transmission rod is movably sleeved on the inner wall of the guide sleeve. The transmission rod is arranged longitudinally, and the top end of the transmission rod is fixedly connected to the upper moving plate.

[0016] A further technical improvement of the present invention is that: a tilting frame is rotatably provided on the inner wall of the movable frame on both sides of the lifting platform; one end of the tilting frame is slidably connected to the bottom end of the corresponding transmission rod; and a roller is rotatably provided on the end of the tilting frame away from the transmission rod, and the roller is rotatably connected to the bottom of the lifting platform; wherein, a sliding groove is provided at the sliding connection between the tilting frame and the bottom end of the transmission rod, and the bottom end of the transmission rod can slide freely in the sliding groove to ensure that the tilting frame can rotate smoothly.

[0017] A further technical improvement of the present invention is that: a movable seat is fixedly installed at the bottom of the movable frame, and the bottom of the movable seat is slidably connected to the top of the support platform through a third guide rail. A second cylinder is fixedly installed on the support platform behind the movable seat through a positioning seat. The second cylinder is arranged horizontally, and the extended end of the second cylinder is fixedly connected to the movable seat. The upper moving plate is controlled by the first cylinder, which in turn links the lower moving plate to realize the synchronous airflow at the upper and lower cutting position of the metal strip, ensuring the stability of the longitudinal shearing process. This design has significant advantages in improving the shearing quality and reducing the equipment load.

[0018] A further technical improvement of the present invention is that: a traction fixture is fixedly connected to the top of the support platform. The traction fixture is existing technology. The two output ends of the traction fixture are respectively fixedly connected to a first pinch roller and a second pinch roller. Two fixed frames are fixedly installed on the side of the traction fixture near the slitting machine body. The two fixed frames are respectively located on the front and rear sides of the metal strip. Several guide rollers for preventing the metal strip from running off-center are rotatably arranged inside the fixed frames.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In use, the end of the metal strip is moved onto several rolling rollers. At this time, the end of the metal strip pushes one of the feeding blocks, and the corresponding rotating rod rotates. As the metal strip continues to move, both feeding blocks are brought into close contact with the top surface of the metal strip. By controlling the extension end of the hydraulic cylinder to extend to its maximum length, the lifting seat rises to a set position. At this time, the end of the metal strip corresponds to the position between the first and second pinch rollers. In this process, the two feeding blocks, in conjunction with several rolling rollers, facilitate the driving of the end of the metal strip to extend between the first and second pinch rollers, reducing the difficulty of threading the metal strip due to its high hardness.

[0021] In use, this invention involves controlling the second cylinder to extend to its maximum length. At this point, the metal strip is positioned within the moving frame. Several first and second nozzles are activated, and the extended end of the first cylinder is then controlled to extend to its maximum length. During the extension of the first and second cylinders, displacement sensors mounted on them precisely control the extension amount. Based on the width and thickness of the metal strip, the metal strip is positioned precisely within the moving frame and maintains a 5cm distance from the first and second nozzles. Simultaneously, the upper moving plate moves several first nozzles closer to the cutting point of the metal strip. As the upper moving plate moves downward, it drives two transmission rods downward, which in turn rotate two flipping frames. This, in conjunction with two rollers, pushes the lifting platform and the lower moving plate upward, bringing several second nozzles closer to the cutting point of the metal strip. The external air supply fixture is activated, and airflow is directed through the first and second nozzles to the cutting position of the metal strip, preventing dust and other hard impurities from affecting the accuracy of the longitudinal cutting of the metal strip. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of the guiding mechanism structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0026] Figure 4 This is a three-dimensional schematic diagram of the blower mechanism of the present invention;

[0027] Figure 5 This is a front view of the blower mechanism of the present invention;

[0028] Figure 6This is a three-dimensional schematic diagram of a partial structure of the blower mechanism of the present invention.

[0029] In the diagram: 1. Slitting machine body; 2. Support roller; 3. Guide roller; 4. Base; 5. Guide mechanism; 6. Fixed frame; 7. Air blowing mechanism; 501. Transmission plate; 502. Rolling roller; 503. Groove; 504. Hydraulic cylinder; 505. Lifting seat; 506. Guide cover; 507. Mounting seat; 508. Rotating rod; 509. Tension spring; 510. Fixed plate; 701. Moving frame; 702. Upper moving plate; 703. Lower moving plate; 704. Second nozzle; 705. Moving seat; 706. Second cylinder; 707. Positioning seat; 708. First cylinder; 709. Second guide rail; 710. Guide sleeve; 711. Roller; 712. Third guide rail; 713. Tilting frame; 714. Transmission rod; 715. First nozzle; 716. Guide rod; 717. Lifting platform; 718. Counterweight. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-6 As shown, a slitting machine with automatic strip feeding function includes a base 4 and a support platform fixedly installed on its top. The slitting machine body 1 is fixedly installed on the top of the base 4 away from the support platform. A blower mechanism 7 for cleaning metal strip is provided on the top of the support platform near the slitting machine body 1. A guide mechanism 5 for assisting the strip feeding is provided on the support platform on one side of the blower mechanism 7.

[0032] Please see Figure 2 and Figure 3As shown, the aforementioned guiding mechanism 5 includes a guide cover 506 fixedly connected to a support platform. A longitudinally arranged hydraulic cylinder 504 is fixedly installed on the support platform below the guide cover 506. A lifting seat 505 is fixedly installed at the extended end of the hydraulic cylinder 504. A groove 503 is provided on the top of the lifting seat 505. Several rolling rollers 502 for conveying metal strip are rotatably arranged inside the groove 503. The lifting seat 505 is slidably connected to the inner wall of the guide cover 506 through a first guide rail. The rolling rollers 502 are rotatably connected to the inner wall of the groove 503 through deep groove ball bearings. The deep groove ball bearings can withstand a large radial load, ensuring the flexibility and stability of the rolling rollers 502 rotation, thereby improving the accuracy of the rolling rollers 502 in conveying metal strip. It can accurately guide the end of the metal strip to the space between the first pinch roller and the second pinch roller, reducing the difficulty of threading the strip due to its high hardness and improving the threading efficiency.

[0033] Please see Figure 2 and Figure 3 As shown, four mounting seats 507 are fixedly connected to the top of the inner wall of the guide cover 506. Two rotating rods 508 are rotatably arranged between two corresponding mounting seats 507 via a rotating shaft, and a feeding block is fixedly arranged between the two rotating rods 508.

[0034] Please see Figure 2 and Figure 3 As shown, a transmission plate 501 is hinged between the two rotating rods 508 that are away from the first guide rail. A fixing plate 510 is also fixedly connected to the top of the inner wall of the guide cover 506. A tension spring 509 is fixedly connected between the fixing plate 510 and one of the rotating rods 508. The fixing plate 510 is located away from the slitting machine body 1.

[0035] Please see Figure 2 and Figure 3 As shown, the blower mechanism 7 includes a movable frame 701, an upper moving plate 702 is provided inside the movable frame 701, and a plurality of first nozzles 715 are fixedly installed at the bottom of the upper moving plate 702. The plurality of first nozzles 715 are arranged at equal intervals. A longitudinally arranged guide rod 716 is fixedly installed at each of the four corners of the top of the upper moving plate 702. The top of the guide rod 716 moves through the top of the movable frame 701. The four guide rods 716 provide guidance for the movement of the upper moving plate 702, ensuring its smooth lifting and lowering. A sealing ring is provided at the point where the guide rod 716 moves through the top of the movable frame 701 to prevent dust and other impurities from entering the interior of the movable frame 701. At the same time, grease is applied to the contact area between the guide rod 716 and the movable frame 701 to reduce friction and ensure the flexibility of the lifting and lowering of the upper moving plate 702.

[0036] Please see Figure 3As shown, a first cylinder 708 arranged longitudinally is fixedly installed on the top of the aforementioned movable frame 701. The extended end of the first cylinder 708 extends through the top of the movable frame 701 and is fixedly connected to the upper moving plate 702.

[0037] Please see Figure 3 and Figure 4 As shown, the inner wall of the aforementioned movable frame 701 is slidably connected to the lifting platform 717 via two second guide rails 709. A counterweight 718 is fixedly installed at the bottom of the lifting platform 717, and a horizontally arranged lowering plate 703 is fixedly installed on the lifting platform 717. Several second nozzles 704 are fixedly installed on the top of the lowering plate 703. The positions of the several second nozzles 704 correspond to the positions of several first nozzles 715. The input ends of the several first nozzles 715 and the second nozzles 704 are all connected to the outside via flexible hoses. The air supply fixture is connected; the second guide rail 709 adopts a linear guide rail structure and is made of high-strength stainless steel, which has the characteristics of wear resistance and corrosion resistance. The lifting platform 717 is fixedly connected to the slider of the second guide rail 709 by bolts to ensure that the lifting platform 717 can slide smoothly along the second guide rail 709. The function of the counterweight 718 is to keep the lifting platform 717 balanced by its own weight when the upper moving plate 702 drives the first nozzle 715 to move down, so as to avoid the lifting platform 717 tilting due to the force generated by the downward movement of the upper moving plate 702.

[0038] Please see Figure 3 and Figure 4 As shown, guide sleeves 710 are fixedly installed on the inner walls of the movable frames 701 on both sides of the lifting platform 717. A transmission rod 714 is movably sleeved on the inner wall of the guide sleeve 710. The transmission rod 714 is arranged longitudinally, and its top end is fixedly connected to the upper moving plate 702. The fitting accuracy between the guide sleeve 710 and the transmission rod 714 is H7 / f6, and the gap size is controlled between 0.05-0.1mm. This ensures that the transmission rod 714 can move flexibly within the guide sleeve 710 and ensures the accuracy of transmission, so that the upper moving plate 702 and the lower moving plate 703 can be precisely linked.

[0039] Please see Figure 3 and Figure 4As shown, a tilting frame 713 is rotatably mounted on the inner wall of the movable frame 701 on both sides of the lifting platform 717. One end of the tilting frame 713 is slidably connected to the bottom end of the corresponding transmission rod 714, and a roller 711 is rotatably mounted on the end of the tilting frame 713 away from the transmission rod 714. The roller 711 is rotatably connected to the bottom of the lifting platform 717. A sliding groove is provided at the sliding connection between the tilting frame 713 and the bottom end of the transmission rod 714, and the bottom end of the transmission rod 714 can slide freely in the sliding groove to ensure that the tilting frame 713 can rotate smoothly. The roller 711 is made of rubber with a diameter of 20mm, which has a certain elasticity and wear resistance, which can reduce friction between the roller and the bottom of the lifting platform 717 and improve the reliability of the linkage mechanism.

[0040] Please see Figures 1-3 As shown, a movable seat 705 is fixedly installed at the bottom of the movable frame 701. The bottom of the movable seat 705 is slidably connected to the top of the support platform via a third guide rail 712. A second cylinder 706 is fixedly installed on the support platform behind the movable seat 705 via a positioning seat 707. The second cylinder 706 is arranged horizontally, and its extended end is fixedly connected to the movable seat 705. The upper moving plate 702 is controlled by the first cylinder 708, which in turn links the lower moving plate 703 to achieve synchronous airflow at the cutting position of the metal strip, ensuring stability during the slitting process. This design has significant advantages in improving cutting quality and reducing equipment load.

[0041] Please see Figure 1 and Figure 5 As shown, a traction fixture is fixedly connected to the top of the support platform. The traction fixture is existing technology, and a first pinch roller and a second pinch roller are fixedly connected to the two output ends of the traction fixture, respectively.

[0042] Please see Figure 1 As shown, the aforementioned traction fixture has two fixed frames 6 fixedly installed on one side of the slitting machine body 1. The two fixed frames 6 are located on the front and rear sides of the metal strip, respectively, and the fixed frames 6 are rotatably equipped with a number of guide rollers 3 to prevent the metal strip from running off-center. The guide rollers 3 between the two fixed frames 6 can effectively guide the metal strip and prevent it from running off-center.

[0043] Please see Figure 1 As shown, a support roller 2 is rotatably mounted on the base 4 between the slitting machine body 1 and the support table; wherein, the support roller 2 provides support and guidance for the metal strip to prevent it from bending and deforming during the transfer process.

[0044] Working Principle: In use, the metal strip is first uncoiled by an uncoiler to ensure it is flat and wrinkle-free. The end of the metal strip is then moved onto several rolling rollers 502. At this point, the end of the metal strip pushes one of the feeding blocks, causing the corresponding rotating rod 508 to rotate. Continued movement of the metal strip ensures that both feeding blocks are in close contact with the top surface of the metal strip. By controlling the extension end of the hydraulic cylinder 504 to its maximum length, the lifting seat 505 rises to a set position. At this point, the end of the metal strip is in contact with the first pinch roller. The position corresponds to that between the first and second pinch rollers. During this process, two feeding blocks, in conjunction with several rolling rollers 502, facilitate the driving of the end of the metal strip into the space between the first and second pinch rollers. This reduces the difficulty of threading the metal strip due to its high hardness. After the metal strip passes between the first and second pinch rollers, it is guided by guide rollers 3 inside the two fixed frames 6 to prevent the metal strip from deviating, thereby reducing the occurrence of excessive shear width or incomplete separation of waste edges. The extension of the second cylinder 706 is controlled by... When the metal strip reaches its maximum length, it is positioned within the moving frame 701. Several first nozzles 715 and second nozzles 704 are activated, and the extended end of the first cylinder 708 is extended to its maximum length. During the extension of the first cylinder 708 and second cylinder 706, the extension amount is precisely controlled by displacement sensors mounted on them. Based on the width and thickness of the metal strip, the metal strip is positioned precisely within the moving frame 701 and maintains a 5cm distance from the first nozzles 715 and second nozzles 704. At this time, the upper moving plate 702 drives several first nozzles... 715 is positioned close to the cutting point of the metal strip. Simultaneously, as the upper moving plate 702 moves downward, it drives two transmission rods 714 downward, which in turn pushes two tilting frames 713 to rotate. This, in conjunction with two rollers 711, pushes the lifting platform 717 and the lower moving plate 703 upward, causing several second nozzles 704 to approach the cutting point of the metal strip. The external air supply fixture is then activated, and airflow is directed to the cutting position of the metal strip through several first nozzles 715 and second nozzles 704, preventing hard impurities such as dust from affecting the accuracy of longitudinally shearing the metal strip.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A slitting machine with automatic threading function, comprising a base (4) and a support platform fixedly installed on its top, characterized in that: The base (4) is fixedly installed on the side away from the support platform. The support platform is provided with a blower mechanism (7) for cleaning metal strip on the side close to the slitting machine body (1). A guide mechanism (5) for assisting the metal strip to be threaded is provided on the support platform on the side of the blower mechanism (7). The guiding mechanism (5) includes a guide cover (506) fixedly connected to the support platform. A hydraulic cylinder (504) is fixedly installed on the support platform below the guide cover (506). A lifting seat (505) is fixedly installed at the extended end of the hydraulic cylinder (504). A groove (503) is provided on the top of the lifting seat (505). Several rolling rollers (502) for conveying metal strips are rotatably arranged inside the groove (503). The lifting seat (505) is slidably connected to the inner wall of the guide cover (506) through a first guide rail.

2. A slitting machine with automatic threading function according to claim 1, characterized in that, The top of the inner wall of the guide cover (506) is fixedly connected to four mounting seats (507), and two rotating rods (508) are rotatably arranged between two corresponding mounting seats (507), and a feeding block is fixedly arranged between the two rotating rods (508).

3. A slitting machine with automatic threading function according to claim 2, characterized in that, A transmission plate (501) is hinged between the two rotating rods (508) away from the first guide rail. A fixing plate (510) is also fixedly connected to the top of the inner wall of the guide cover (506). A tension spring (509) is fixedly connected between the fixing plate (510) and one of the rotating rods (508). The fixing plate (510) is located away from the slitting machine body (1).

4. A slitting machine with automatic threading function according to claim 1, characterized in that, The blower mechanism (7) includes a movable frame (701), and an upper moving plate (702) is provided inside the movable frame (701). Several first nozzles (715) are fixedly installed at the bottom of the upper moving plate (702). The several first nozzles (715) are arranged at equal distances. Guide rods (716) are fixedly installed at the four corners of the top of the upper moving plate (702). The top of the guide rods (716) can move through the top of the movable frame (701).

5. A slitting machine with automatic threading function according to claim 4, characterized in that, A first cylinder (708) is fixedly installed on the top of the movable frame (701). The extended end of the first cylinder (708) extends through the top of the movable frame (701) and is fixedly connected to the upper moving plate (702).

6. A slitting machine with automatic threading function according to claim 5, characterized in that, The inner wall of the movable frame (701) is slidably connected to the lifting platform (717) via two second guide rails (709). A counterweight (718) is fixedly installed at the bottom of the lifting platform (717), and a lowering plate (703) is fixedly installed on the lifting platform (717). Several second nozzles (704) are fixedly installed on the top of the lowering plate (703), and the positions of the several second nozzles (704) correspond to the positions of the several first nozzles (715).

7. A slitting machine with automatic threading function according to claim 6, characterized in that, Guide sleeves (710) are fixedly installed on the inner walls of the movable frames (701) on both sides of the lifting platform (717). A transmission rod (714) is movably sleeved on the inner wall of the guide sleeve (710), and the top end of the transmission rod (714) is fixedly connected to the upper moving plate (702).

8. A slitting machine with automatic threading function according to claim 7, characterized in that, On the inner walls of the movable frames (701) on both sides of the lifting platform (717), a tilting frame (713) is rotatably provided. One end of the tilting frame (713) is slidably connected to the bottom end of the corresponding transmission rod (714), and a roller (711) is rotatably provided at the end of the tilting frame (713) away from the transmission rod (714). The roller (711) is rotatably connected to the bottom of the lifting platform (717).

9. A slitting machine with automatic threading function according to claim 8, characterized in that, The bottom of the movable frame (701) is fixedly installed with a movable seat (705), the movable seat (705) is slidably connected to the top of the support platform, and a second cylinder (706) is fixedly installed on the support platform behind the movable seat (705) through a positioning seat (707), and the extended end of the second cylinder (706) is fixedly connected to the movable seat (705).

10. A slitting machine with automatic threading function according to claim 9, characterized in that, The top of the support platform is fixedly connected to a traction fixture. The two output ends of the traction fixture are respectively fixedly connected to a first pinch roller and a second pinch roller. Two fixed frames (6) are fixedly installed on the side of the traction fixture close to the slitting machine body (1). The two fixed frames (6) are located on the front and rear sides of the metal strip respectively, and several guide rollers (3) are rotatably arranged inside the fixed frames (6) to prevent the metal strip from running off-center.

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