A waste strip steel recycling system

Abstract

The present invention discloses a system for recycling scrap steel strips, which belongs to the technical field of scrap steel strip utilization. It solves the problem that the clamping ends of the steel strips are wasted during the stamping and forming process, and the scrap steel strips can only be recycled but not directly utilized. The system includes an unwinding device, which conveys the unwound ends of the steel strips or scrap steel strip coils into a straightening device; a welding device is provided between the straightening device and the conveying device, and the welding device cooperates with the straightening device and the conveying device to weld the two ends of the steel strips, or welds the two ends of the steel strips to the scrap steel plates; the conveying device cooperates with the scrap steel plate transfer device to convey the scrap steel plates, and the conveying device conveys the welded steel strips to a stamping device, which stamps and forms the middle portion of the steel strips. The stamping device of the present invention uses the scrap steel strip coils or scrap steel plates of the scrap steel strips as the clamping ends of the steel strips, thereby reducing the waste of the clamping ends during the stamping and forming process of the steel strips and reusing the scrap steel strips.

Description

Technical Field

[0001] The present invention relates to the technical field of waste strip steel utilization, and in particular to a waste strip steel reuse system. Background Art

[0002] Strip steel is a narrow and long steel plate produced by various steel rolling mills to meet the needs of industrial production of various metal or mechanical products in different industrial sectors. Strip steel, also known as strip steel, is a steel plate with a width of less than 1300mm and a length that varies slightly depending on the size of each roll. Strip steel is generally supplied in coils and is formed into Figure 2 The strip steel (a) shown has the advantages of high dimensional accuracy, good surface quality, easy processing, and material saving.

[0003] During the strip stamping process, the punch press stamps the middle of the strip, resulting in waste of the clamping ends on both sides of the strip.

[0004] like Figure 2 As shown in the figure, scrap steel strips are generated during the processing of steel strips, including scrap steel plates (c) and scrap steel coils (b). Scrap steel plates (c) are products of poor quality due to production factors and are no longer coiled; scrap steel coils (b) are formed by cutting due to size issues of the steel strips; scrap steel plates and scrap steel coils are directly recycled to the furnace to refine raw materials and reprocessed into high-quality steel strips. The recycling process causes additional losses. Summary of the Invention

[0005] In response to the above problems in the prior art, the present invention provides a scrap steel strip recycling system, which solves the problem that the clamping end of the steel strip is wasted during the stamping process and the scrap steel strip can only be recycled but not directly utilized.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A scrap steel strip recycling system comprises an unwinding device, which conveys the unwound end of the steel strip or scrap steel strip coil into a straightening device; a welding device is provided between the straightening device and the conveying device, which cooperates with the straightening device and the conveying device to weld the two ends of the steel strip, or welds the two ends of the steel strip to the scrap steel plate; the conveying device cooperates with the scrap steel plate transfer device to convey the scrap steel plate, and the conveying device conveys the welded steel strip to a stamping device, which stamps the middle part of the steel strip; the unwinding device, the straightening device, the conveying device, the scrap steel plate transfer device, the welding device and the stamping device are all electrically connected to a PLC.

[0008] In this solution, the unwinding device unfolds the scrap steel coil and the steel strip synchronously, and the two sides of the steel strip are adjacent to the scrap steel coil respectively, which is convenient for the welding device to directly weld the two sides of the steel strip; the scrap steel plate is moved to the conveying device by the scrap steel plate transfer device, and the conveying device cooperates with the welding device to weld the two ends of the unfolded steel strip to the scrap steel plate respectively; the stamping device clamps the two sides of the steel strip or the scrap steel strip with both ends welded together to stamp the steel strip, avoiding the waste of the clamping end of the steel strip while reusing the scrap steel strip.

[0009] Furthermore, the uncoiler device includes a first uncoiler, a second uncoiler and a third uncoiler with the same structure. The second uncoiler and the third uncoiler are located on both sides of the first uncoiler and are arranged opposite to each other. The first uncoiler unwinds the strip steel, and the second uncoiler and the third uncoiler both unwind the waste strip steel coil. Both sides of the unwound strip steel are tightly attached to the unwound waste strip steel coil; the first uncoiler, the second uncoiler and the third uncoiler are all electrically connected to the PLC.

[0010] In this solution, the second uncoiler and the third uncoiler are located on both sides of the first uncoiler and are arranged opposite each other, so that the two ends of the strip steel on the first uncoiler are closely attached to the waste strip steel coils on the second uncoiler and the third uncoiler respectively.

[0011] Furthermore, the first uncoiler includes a fixed table, a base and a shell. The bottom of the base is slidingly connected to the fixed table, and the base is welded to the shell. A motor is provided inside the shell, and the motor is rotationally connected to the uncoiler wheel outside the shell. The uncoiler wheel is provided with a tensioning assembly, and the tensioning assembly tightens the inner ring of the strip; a pressing assembly and a distance sensor are fixed on the shell, and the pressing assembly presses the outermost layer of the strip, and the distance sensor measures the radius of the outermost layer of the strip. The distance sensor and the motor in the shell are electrically connected to the PLC.

[0012] In this solution, the PLC controls the angular velocity of the motor through the radius data fed back by the distance sensor to ensure that the unwinding speeds of the first uncoiler, the second uncoiler and the third uncoiler are the same.

[0013] Furthermore, the heights of the fixed platforms of the second and third uncoilers are greater than the height of the shell of the first uncoiler, and the fixed platforms of the second and third uncoilers are vertically distributed on both sides of the fixed platform of the first uncoiler.

[0014] In this solution, the height of the fixed platform is designed in such a way that the waste strip coils are distributed on both sides of the strip.

[0015] Furthermore, the conveying device includes a first scrap strip steel plate roller assembly, a second scrap strip steel plate roller assembly, a transfer roller assembly and a feed roller assembly; the first scrap strip steel plate roller assembly and the straightening device are arranged on the same straight line, and the first scrap strip steel plate roller assembly is connected to the straightening device through the transfer roller assembly; the second scrap strip steel plate roller assembly and the feed roller assembly are both located on one side of the first scrap strip steel plate roller assembly, and the second scrap strip steel plate roller assembly is connected to the feed roller assembly through the transfer roller assembly; the transfer roller assembly moves between the first scrap strip steel plate roller assembly and the second scrap strip steel plate roller assembly.

[0016] In this solution, the middle roller conveyor realizes the transportation of strip steel between the first scrap strip steel plate roller conveyor assembly and the second scrap strip steel plate roller conveyor assembly.

[0017] Furthermore, the first scrap strip steel plate roller assembly and the second scrap strip steel plate roller assembly have the same structure and both include a scrap strip steel roller; a centering component is provided on the scrap strip steel roller, and the centering component includes two baffles, and both baffles are provided with slide grooves. The two baffles are symmetrically distributed on both sides of the scrap strip steel roller, and the two baffles are respectively fixedly connected to two hydraulic rods in the hydraulic circuit, and the hydraulic circuit is connected to the PLC.

[0018] In this solution, the scrap steel plate is centered by the chute without affecting the movement of the scrap steel plate on the scrap strip roller.

[0019] Furthermore, the transfer roller assembly includes a transfer roller; the transfer roller is fixedly connected to the slider of the screw slider mechanism, and the transfer roller moves between the two scrap strip rollers through the screw slider mechanism to transport the strip to be sheared.

[0020] In this solution, the sheared strip steel is conveyed to the second scrap steel plate roller assembly via a transfer roller, so as to facilitate welding of the sheared end of the strip steel and the scrap steel strip.

[0021] Furthermore, a clamping member and a pressing member are provided on the transfer roller. The clamping member includes two base plates, which are symmetrically located on both sides of the transfer roller, and the two base plates are respectively fixedly connected to two hydraulic rods in the hydraulic circuit; the pressing member includes two pressing rollers, which are located above one end of the transfer roller. The two ends of the two pressing rollers are rotatably fixed in the mounting plate, and the mounting plate is fixedly connected to the hydraulic rods of the hydraulic circuit.

[0022] In this solution, the pressing member ensures that the welding ends of the scrap steel plate and the strip steel are parallel.

[0023] Furthermore, the welding device includes two robotic arms, which are movably connected to the crossbeam, and the center line of the crossbeam is perpendicular to the edge line of the transfer roller; welding guns are fixed on the two robotic arms, and the welding guns weld the scrap steel strip and the steel strip, and the two robotic arms are electrically connected to the PLC.

[0024] In this solution, the welding gun on the robot arm is used to weld the strip steel and the scrap strip steel. The welded scrap strip steel acts as the clamping end of the strip steel, and the connection strength of the clamping end is ensured by welding.

[0025] Furthermore, the scrap steel plate transfer device includes two three-axis platforms, which are respectively located on one side of the two scrap steel rollers. Suction cups are installed on the two three-axis platforms. The two suction cups respectively absorb the two scrap steel plates and place the two scrap steel plates on the two scrap steel rollers respectively. The two three-axis platforms are connected to the PLC.

[0026] In this solution, the three-axis platform has a large moving range and uses suction cups to carry waste steel plates, so the structure is simple.

[0027] The present invention discloses a waste strip steel recycling system, which has the following beneficial effects:

[0028] 1. The stamping device of the present invention uses the scrap steel coils or scrap steel plates of the scrap steel strip as the clamping ends of the steel strip, thereby reducing the waste of the clamping ends during the stamping and forming process of the steel strip and reusing the scrap steel strip; the welding device cooperates with the conveying device to weld the scrap steel coils and scrap steel plates to both sides and both ends of the steel strip, respectively, thereby ensuring the connection strength of the clamping ends.

[0029] 2. The unwinding device of the present invention unfolds the scrap steel coil and the steel strip synchronously, and makes both sides of the steel strip adjacent to both sides of the scrap steel coil, so that the welding device can weld the adjacent parts directly during the straightening process of the straightening device.

[0030] 3. The present invention utilizes the middle roller assembly to ensure that both ends of the strip are in close contact with the scrap steel plates in sequence, thus avoiding the turning of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of the scrap steel strip recycling system;

[0032] Figure 2 Schematic diagram of strip steel, scrap steel coil and scrap steel plate;

[0033] Figure 3 Schematic diagram of welding strip steel and scrap strip steel;

[0034] Figure 4 It is a structural schematic diagram of the unwinding device;

[0035] Figure 5 It is a structural schematic diagram of the first uncoiler;

[0036] Figure 6 It is a structural diagram of the straightening device;

[0037] Figure 7 It is a structural schematic diagram of the conveying device;

[0038] Figure 8 It is a structural diagram of the transfer roller assembly;

[0039] Figure 9 It is a structural schematic diagram of the waste strip steel plate transfer device;

[0040] Figure 10 It is a structural schematic diagram of the welding device;

[0041] Figure 11 This is a schematic diagram of the movement of the transfer roller assembly;

[0042] Wherein: 1. Unwinding device; 11. First uncoiler; 12. Second uncoiler; 13. Third uncoiler; 111. Base; 112. Housing; 113. Unwinding wheel; 114. Tensioning assembly; 115. Pressing assembly; 116. Distance sensor;

[0043] 2. Straightening device; 21. Straightening machine; 22. Auxiliary material feeding assembly; 221. Upper roller assembly; 222. Lower roller assembly;

[0044] 3. Conveying device; 31. First scrap steel plate roller assembly; 32. Second scrap steel plate roller assembly; 33. Transfer roller assembly; 34. Feed roller assembly; 331. Bottom plate; 332. Pressure roller; 333. Mounting plate; 334. Screw slider mechanism;

[0045] 4. Scrap steel plate transfer device; 41. Three-axis platform; 42. Suction cup;

[0046] 5. Welding device; 51. Robotic arm; 52. Crossbeam. DETAILED DESCRIPTION

[0047] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0048] According to one embodiment of the present application, Figure 1 The scrap steel strip recycling system of this scheme includes an unwinding device 1, a straightening device 2, a conveying device 3, a scrap steel strip plate transferring device 4, a welding device 5 and a punching device.

[0049] The unwinding device 1 is used to unwind the steel strip, or to unwind the steel strip and scrap steel coils synchronously, and to convey the unwinding end to the straightening device 2 .

[0050] Specifically, refer to Figure 4The uncoiler 1 includes a first uncoiler 11, a second uncoiler 12, and a third uncoiler 13. The second uncoiler 12 and the third uncoiler 13 are located on both sides of the first uncoiler 11 and are arranged opposite to each other. The first uncoiler 11 is used for unwinding the strip steel, and the second uncoiler 12 and the third uncoiler 13 are both used for unwinding the scrap steel coil.

[0051] refer to Figure 5 The first uncoiler 11, the second uncoiler 12 and the third uncoiler 13 have the same structure, and all include a fixed platform, a base 111 and a shell 112. The bottom of the base 111 is slidably connected to the fixed platform, and one side of the base 111 is welded to the shell 112. A motor is provided inside the shell 112, and the motor is rotatably connected to an uncoiler wheel 113 outside the shell 112. A tensioning assembly 114 is provided on the uncoiler wheel 113, and the tensioning assembly 114 is connected to a hydraulic circuit. The tensioning assembly 114 is used to tighten the inner ring of the strip steel. A pressing assembly 115 and a distance sensor 116 are fixed to the shell 112. The pressing assembly 115 is used to press the outermost layer of the strip steel, and the distance sensor 116 is used to measure the outermost radius of the strip steel or scrap strip steel coil on the uncoiler wheel 113. The distance sensor 116 is electrically connected to the motor through a PLC. The PLC controls the angular velocity of the motor through the distance feedback of the distance sensor 116, so that the uncoiling speeds of the strip steel or scrap strip steel coils on the first uncoiler 11, the second uncoiler 12 and the third uncoiler 13 are the same.

[0052] A slide rail is provided on the fixed platform, and the base 111 is slidably connected to the slide rail. The base 111 is provided with an installation position and a fixed position on the slide rail. When the base 111 is in the installation position, the unwinding wheel 113 is used to install the strip steel or waste strip steel coil. When the base 111 is in the fixed position, it is used to unfold the strip steel or waste strip steel coil.

[0053] The height of the fixed platform of the second uncoiler 12 and the third uncoiler 13 is greater than the height of the shell 112 of the first uncoiler 11 and is vertically distributed on both sides of the fixed platform of the first uncoiler 11. When the first uncoiler 11, the second uncoiler 12 and the third uncoiler 13 are all in fixed positions, the strip steel of the first uncoiler 11 is adjacent to the scrap strip steel coils on the second uncoiler 12 and the third uncoiler 13 respectively.

[0054] The installation process of the strip steel: first, move the base 111 of the first uncoiler 11 to the installation position, insert the inner roll of the strip steel onto the uncoiler wheel 113 of the first uncoiler 11, and use the tensioning component 114 on the uncoiler wheel 113 to tighten and fix it, then use the pressing component 115 to press the outer layer of the strip steel, and finally move the base 111 of the first uncoiler 11 to the fixed position.

[0055] The installation process of scrap strip steel coils is the same as that of strip steel, so it will not be repeated here.

[0056] The distance sensor 116 of this embodiment is, but is not limited to, a laser sensor, which is fixed to the housing 112 and is used to measure the outermost radius of the strip and scrap coils;

[0057] Specifically, in the first uncoiler 11, the distance from the laser sensor to the center of the uncoiler wheel 113 is set to The laser sensor measures the distance from itself to the outermost layer of the strip on the first uncoiler 11 as , then the outermost radius of the strip on the first uncoiler 11 is .

[0058] Similarly, in the second uncoiler 12, the distance from the laser sensor to the center of the uncoiler wheel 113 is set to The laser sensor measures the distance from itself to the outermost layer of the strip on the second uncoiler 12 as , then the outermost radius of the strip on the first uncoiler 11 is .

[0059] Similarly, in the third uncoiler 13, the distance from the laser sensor to the center of the uncoiler wheel 113 is set to The laser sensor measures the distance from itself to the outermost layer of the strip on the third uncoiler 13 as , then the outermost radius of the strip on the third uncoiler 13 is .

[0060] Set the unwinding speed of the first unwinder 11, the second unwinder 12 and the third unwinder 13 to 、 and ;

[0061] The angular velocity of the first uncoiler 11, the second uncoiler 12 and the third uncoiler 13 is 、 and ;

[0062] The straightening speed of the straightening device 2 is .

[0063]

[0064] Therefore, in order to keep the unwinding speed of the first uncoiler 11, the second uncoiler 12 and the third uncoiler 13 the same as the straightening speed of the straightening device 2, the PLC controls the angular velocity of the first uncoiler 11, the second uncoiler 12 and the third uncoiler 13, that is, the angular velocity of their respective motors. 、 and They are 、 and .

[0065] The straightening device 2 is used to straighten and shear the unwound steel strip, or to straighten and shear the unwound steel strip and the scrap steel strip coil synchronously.

[0066] Specifically, refer to Figure 6 The straightening device 2 includes an auxiliary material feeding component 22 and a straightening machine 21. The auxiliary material feeding component 22 assists the unwinding device in conveying the strip steel and scrap strip steel coils; the motor of the straightening machine 21 is connected to the PLC, and an upper roller assembly 221 and a lower roller assembly 222 are provided in the middle of the straightening machine 21. The upper roller assembly 221 and the lower roller assembly 222 both include a plurality of evenly arranged rollers. The unrolled end of the strip steel or scrap strip steel coil passes between the rollers of the upper roller assembly 221 and the lower roller assembly 222 to complete horizontal straightening.

[0067] Set the radius of the roller to R, and the PLC controls the angular velocity of the motor of the straightening machine 21 , thereby controlling the speed of the roller .

[0068] A shearing component is provided at the end of the straightening machine 21, and the shearing component is connected to the PLC. The PLC controls the shearing component to shear the strip steel and the scrap strip steel coil at regular intervals through the straightening speed of the straightening machine 21 to ensure that the shearing length is equal. The shearing component of this embodiment is a laser cutting component or a guillotine cutting component.

[0069] Specifically, refer to Figure 7 The conveying device 3 includes a first scrap strip steel plate roller assembly 31, a second scrap strip steel plate roller assembly 32, a transfer roller assembly 33 and a feeding roller assembly 34. The first scrap strip steel plate roller assembly 31 and the straightening machine 21 are arranged on the same straight line, and the first scrap strip steel plate roller assembly 31 is connected to the straightening machine 21 through the transfer roller assembly 33. The second scrap strip steel plate roller assembly 32 and the feeding roller assembly 34 are both located on one side of the first scrap strip steel plate roller assembly 31, and the second scrap strip steel plate roller assembly 32 is connected to the feeding roller assembly 34 through the transfer roller assembly 33. The transfer roller assembly 33 moves between the first scrap strip steel plate roller assembly 31 and the second scrap strip steel plate roller assembly 32.

[0070] The first and second scrap steel plate roller assemblies 31 and 32 are identical in structure, each comprising a scrap steel plate roller and a centering member. The centering member comprises two baffles, each with a chute. The two baffles are symmetrically located on either side of the scrap steel plate roller and are fixedly connected to two hydraulic rods in a hydraulic circuit connected to a programmable logic controller (PLC). Driven by the hydraulic circuit, the two hydraulic cylinders extend their hydraulic rods. The baffles on the two hydraulic rods push the scrap steel plates on the scrap steel plate roller to the center, maintaining their edges parallel to the edges of the scrap steel plate roller. Ball bearings in the chute of the baffle roll in contact with the edges of the scrap steel plate. The baffles and the balls in their internal chute ensure that the scrap steel plates are positioned in the center of the scrap steel plate roller without affecting their transport along the scrap steel plate roller.

[0071] The transfer roller assembly 33 includes a transfer roller, a screw slider mechanism 334, and a clamping mechanism; the clamping mechanism includes two base plates 331, which are symmetrically distributed on both sides of the transfer roller. The two base plates 331 are slidably connected to the hydraulic cylinder for clamping the steel strip and the scrap steel plate.

[0072] refer to Figure 8 The transfer roller is fixed to the slider of the screw slider mechanism 334. The transfer roller moves between the two scrap steel roller assemblies via the screw slider mechanism 334 to transport the welded steel strip. The transfer roller is equipped with a clamping member and a pressing member. The clamping member includes two base plates 331, symmetrically located on either side of the transfer roller and fixedly connected to two hydraulic rods in the hydraulic circuit. The pressing member includes two pressing rollers 332, located above one end of the transfer roller. The two ends of the two pressing rollers 332 are rotatably fixed in the mounting plate 333, which is fixedly connected to the hydraulic rods of the hydraulic circuit.

[0073] The hydraulic circuit of this embodiment includes an oil cylinder, an oil pump and a relief valve. The hydraulic cylinders of this embodiment are connected to the relief valve through hydraulic pipes. The relief valve limits the pressure of the hydraulic cylinder to avoid damage caused by excessive thrust of the hydraulic rod.

[0074] The feeding roller conveys the welded steel strip to the punching device, which clamps the scrap steel strip plate or scrap steel coil for punching the middle of the steel strip. The model of the punching device in this embodiment is but not limited to Y21-100T.

[0075] The motors of the scrap steel roller, transfer roller and feed roller in this embodiment are all connected to the PLC, and the PLC can control the direction of the motors.

[0076] Specifically, refer to Figure 9The waste steel plate transfer device 4 includes a three-axis platform 41, on which a suction cup 42 is installed. The suction cup 42 is connected to the air pressure circuit. The suction cup 42 is used to absorb the waste steel plate and place the waste steel plate on the waste steel roller.

[0077] Specifically, refer to Figure 10 The welding device 5 includes two robotic arms 51, which are movably connected to the crossbeam 52. Welding guns are fixed on the two robotic arms 51 for welding scrap steel strips to each other. The PLC is electrically connected to the robotic arms 51, and the PLC controls the movement and welding of the robotic arms 51. When welding scrap steel coils, the two robotic arms 51 move closer. When welding scrap steel plates, the two robotic arms 51 move above the first scrap steel plate roller assembly 31 and the second scrap steel plate roller assembly 32, respectively.

[0078] The working principle of this embodiment is shown in FIG. Figure 3 :

[0079] Scrap steel coil utilization principle: The steel strip is fixed on the first uncoiler 11, and two scrap steel coils are fixed on the second uncoiler 12 and the third uncoiler 13 respectively. The two scrap steel coils are placed on both sides above the steel strip, and the distance between the two scrap steel coils is equal to the strip width.

[0080] The PLC controls the two mechanical arms 51 of the welding device 5 to move to the end of the straightening machine 21, and the distance between the two mechanical arms 51 is equal to the width of the strip;

[0081] PLC controls the first uncoiler 11, the second uncoiler 12 and the third uncoiler to uncoil and unfold synchronously, and the protruding ends of the strip steel and the two scrap strip steel coils enter the straightening machine 21 synchronously for leveling. During the movement of the straightening machine 21, the two mechanical arms 51 at the end of the straightening machine 21 weld the two scrap strip steel coils to the strip steel through the welding guns thereon. After a certain length, the shearing assembly of the straightening machine 21 cuts the strip steel and the two scrap strip steel coils to form a steel plate with scrap strip steel coils on both sides, which are transported to the feeding roller through the middle roller. The feeding roller transports the welded steel plate to the stamping device, and the stamping device clamps the scrap strip steel coils on both sides of the steel plate to stamp the middle part of the steel plate.

[0082] Principle of recycling scrap steel plates: The scrap steel plate transfer device 4 uses suction cups 42 to suck the scrap steel plates onto the first scrap steel plate roller and the second scrap steel plate roller respectively. The first scrap steel plate roller conveys the scrap steel plates to the transfer roller, which moves the scrap steel plates to the end of the straightening machine 21. When the end of the steel strip unwound from the straightening machine 21 contacts one end of the scrap steel plate on the transfer roller, a mechanical arm 51 of the welding device 5 welds the contact ends together.

[0083] When welding is completed, the shearing component of the straightening machine 21 shears the strip to form a steel plate, and the steel plate is transported to one side of the second scrap steel plate roller. Figure 11 The second scrap steel plate roller brings one end of the scrap steel plate into contact with one side of the steel plate, and another robotic arm 51 of the welding device 5 welds the contact ends together. The two ends of the steel plate are scrap steel plates. The transfer roller conveys the steel plate to the feeding roller, and the feeding roller conveys the welded steel plate to the stamping device. The stamping device clamps the scrap steel plates at both ends of the steel plate to stamp the middle part of the steel plate.

[0084] Although the specific embodiments of the invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A scrap steel strip recycling system, characterized by: include: An unwinding device (1), wherein the unwinding device (1) conveys the unwound end of the steel strip or waste steel strip coil into the straightening device (2); the unwinding device (1) comprises a first unwinder (11), a second unwinder (12) and a third unwinder (13) having the same structure, wherein the second unwinder (12) and the third unwinder (13) are located on both sides of the first unwinder (11) and are arranged opposite to each other, wherein the first unwinder (11) unwinds the steel strip, and the second unwinder (12) and the third unwinder (13) unwind the waste steel strip coil, wherein both sides of the unwound steel strip are in close contact with the unwound waste steel strip coil; the first unwinder (11), the second unwinder (12) and the third unwinder (13) are all electrically connected to a PLC; The straightening device (2) comprises an auxiliary material feeding assembly (22) and a straightening machine (21), wherein a shearing member is provided at the end of the straightening machine (21); the straightening device (2) is used to straighten and shear the unfolded strip steel, or to synchronously straighten and shear the unfolded strip steel and the scrap strip steel coil; The conveying device (3) comprises a first scrap steel plate roller assembly (31), a second scrap steel plate roller assembly (32), a transfer roller assembly (33) and a feed roller assembly (34); the first scrap steel plate roller assembly (31) and the straightening device (2) are arranged on the same straight line, and the first scrap steel plate roller assembly (31) is connected to the straightening device (2) through the transfer roller assembly (33); the second scrap steel plate roller assembly (32) and the feed roller assembly ( 34) are both located on one side of the first scrap steel plate roller assembly (31), and the second scrap steel plate roller assembly (32) is connected to the feeding roller assembly (34) through the transfer roller assembly (33); the transfer roller assembly (33) moves between the first scrap steel plate roller assembly (31) and the second scrap steel plate roller assembly (32); the transfer roller assembly (33) includes a transfer roller; the transfer roller is fixedly connected to the slider of the screw slider mechanism (334); The waste steel plate transfer device (4) comprises two three-axis platforms (41), the two three-axis platforms (41) are respectively located on one side of two waste steel rollers, and suction cups (42) are installed on the two three-axis platforms (41), and the two suction cups (42) respectively absorb two waste steel plates and place the two waste steel plates on the two waste steel rollers, and the two three-axis platforms (41) are connected to the PLC; A welding device (5) comprises two mechanical arms (51), the two mechanical arms (51) are movably connected to a crossbeam (52), the center line of the crossbeam (52) is perpendicular to the edge line of the transfer roller; a welding gun is fixed on each of the two mechanical arms (51), the welding gun welds the scrap steel strip and the steel strip, and the two mechanical arms (51) are electrically connected to a PLC; a welding device (5) is provided between the straightening device (2) and the conveying device (3), the welding device (5) cooperates with the straightening device (2) and the conveying device (3) to weld the two scrap steel coils to the two ends of the steel strip in the width direction or weld the two scrap steel plates to the two ends of the steel strip in the length direction; The conveying device (3) cooperates with the waste steel plate transfer device (4) to convey the waste steel plate, and the conveying device (3) conveys the welded steel strip to the punching device, and the punching device punches and forms the middle part of the steel strip; the unwinding device (1), the straightening device (2), the conveying device (3), the waste steel plate transfer device (4), the welding device (5) and the punching device are all electrically connected to the PLC.

2. The scrap steel strip recycling system according to claim 1, characterized in that: The first uncoiler (11) includes a fixed platform, a base (111) and a shell (112), the bottom of the base (111) is slidably connected to the fixed platform, the base (111) is welded to the shell (112), a motor is provided inside the shell (112), the motor is rotatably connected to the uncoiler wheel (113) outside the shell (112), a tensioning assembly (114) is provided on the uncoiler wheel (113), the tensioning assembly (114) tightens the inner ring of the strip; a pressing assembly (115) and a distance sensor (116) are fixed on the shell (112), the pressing assembly (115) presses the outermost layer of the strip, the distance sensor (116) measures the radius of the outermost layer of the strip, and the distance sensor (116) and the motor in the shell (112) are both electrically connected to a PLC.

3. The scrap steel strip recycling system according to claim 2, characterized in that: The heights of the fixed platforms of the second uncoiler (12) and the third uncoiler (13) are greater than the height of the housing (112) of the first uncoiler (11), and the fixed platforms of the second uncoiler (12) and the third uncoiler (13) are vertically distributed on both sides of the fixed platform of the first uncoiler (11).

4. The scrap steel strip recycling system according to claim 1, characterized in that: The first scrap steel plate roller assembly (31) and the second scrap steel plate roller assembly (32) have the same structure, and both include a scrap steel roller; a centering component is provided on the scrap steel roller, and the centering component includes two baffles, and a slide groove is provided in each of the two baffles. The two baffles are symmetrically distributed on both sides of the scrap steel roller, and the two baffles are respectively fixedly connected to two hydraulic rods in a hydraulic circuit, and the hydraulic circuit is connected to a PLC.

5. The scrap steel strip recycling system according to claim 1, characterized in that: The transfer roller is provided with a clamping member and a pressing member, the clamping member includes two base plates (331), the two base plates (331) are symmetrically located on both sides of the transfer roller, and the two base plates (331) are respectively fixedly connected to two hydraulic rods in the hydraulic circuit; the pressing member includes two pressing rollers (332), the two pressing rollers (332) are located above one end of the transfer roller, and both ends of the two pressing rollers (332) are rotatably fixed in a mounting plate (333), and the mounting plate (333) is fixedly connected to the hydraulic rod of the hydraulic circuit.

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