Cold rolling device and process for finishing strip blank

Abstract

The present invention discloses a cold rolling device and process for finishing a strip blank, the device includes a traction plate, a steel strip uncoiler, a cold rolling mechanism, a laser welding machine and a cutting machine. There are two traction plates, which are used to pull the head end and the tail end of the strip blank respectively; there are two steel strip uncoilers, which are arranged at intervals, and the steel strip uncoilers can be provided with a strip blank coil and a traction plate, and can drive the strip blank coil and the traction plate to uncoil; the cold rolling mechanism is arranged between the two steel strip uncoilers and close to the steel strip uncoiler on the rear side, for cold rolling the strip blank; the laser welding machine is arranged between the cold rolling mechanism and the steel strip uncoiler on the front side, for welding the head end or the tail end of the strip blank with the traction plate; the cutting machine is arranged between the laser welding machine and the steel strip uncoiler on the front side, for cutting the strip blank and the traction plate. The device and process can further improve the rolling efficiency and thickness uniformity of ordinary carbon steel cold-rolled strip.

Description

Technical Field

[0001] The present invention relates to the field of steel plate cold rolling equipment and technology, and more specifically, to a cold rolling device and technology for finishing a strip. Background Art

[0002] Cold rolling mill is a new type of steel cold rolling processing equipment. Cold rolled strip steel is used in many industries such as automobile, shipbuilding, electricity, coal, etc. However, with the advancement of science and technology and the development of society, the requirements for the quality, specifications and quality of strip steel in various industries are gradually increasing. In order to ensure that the strip steel can meet the application standards of various industries, cold rolling mills are gradually developing in the direction of high quality, high precision and high efficiency. Most of the cold rolling mills currently on the market use traction plate traction + unidirectional cold rolling roller cold rolling. Before the traction plate is pulled, welding technology is required to complete the connection between the traction plate and the strip. At present, most of the welding is welding machine + manual auxiliary placement of the traction plate and the strip. This type of welding is slow and of low quality, which seriously affects the quality and efficiency of steel rolling; unidirectional cold rolling is a common cold rolling process in the current cold rolling industry. However, when rolling steel using the unidirectional cold rolling process, the grain arrangement on the surface of the rolled steel is unidirectional. This situation is easy to cause uneven plate thickness, which can seriously cause defects such as cracked edges, folding, and delamination of the steel plate. Summary of the invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a cold rolling device and process for finishing the strip, further improve the rolling efficiency and thickness uniformity of ordinary carbon steel cold-rolled strip, and be able to cold roll the head and tail ends of the strip.

[0004] In order to achieve the above object, the present invention is implemented through the following technical scheme: a cold rolling device for finishing a strip, comprising:

[0005] There are two traction plates, and the two traction plates are used to pull the leading end and the trailing end of the strip respectively;

[0006] A steel strip uncoiler, wherein there are two steel strip uncoilers, which are arranged at intervals, and the steel strip uncoilers can be provided with a strip blank coil and a traction plate, and can drive the blank coil and the traction plate to uncoil;

[0007] A cold rolling mechanism, arranged between the two steel strip uncoilers and close to the steel strip uncoiler at the rear side, for cold rolling the strip;

[0008] A laser welding machine, arranged between the cold rolling mechanism and the steel strip uncoiling machine at the front side, for welding the leading end or the trailing end of the strip to the traction plate; and

[0009] A cutting machine is arranged between the laser welding machine and the steel strip uncoiling machine at the front side, and is used for cutting the strip blank and the traction plate.

[0010] Furthermore, the cutting machine includes a cutting table, a first rotating power source, a gate knife, a rotating guide rod and a mounting frame, the cutting table is supported on the ground, a bracket is arranged above the gate knife, the first rotating power source is arranged on the bracket, there are two rotating guide rods, one end of the two rotating guide rods are hinged to the mounting frame, and the other end of one of the rotating guide rods is hinged to the top end of the bracket, and the other end of the other rotating guide rod is arranged on the power output shaft of the first rotating power source, and the gate knife is installed at the bottom of the mounting frame below, and the gate knife can cut on the strip blank.

[0011] Furthermore, the laser welding machine includes a second rotating power source, a welding table, a guide roller, a ball screw, a laser welding head and a welding machine support frame; the welding table is arranged on the ground, the second rotating power source is arranged on the welding table, the welding machine support frame is arranged adjacent to the welding table, the ball screw is connected to the power output shaft of the second rotating power source, the laser welding head is arranged on the ball screw, the ball screw can drive the laser welding head to move back and forth, and can weld the strip and the traction plate on the welding table together, the guide roller is arranged on the welding machine support frame, there are two guide rollers, the two guide rollers are arranged on the welding machine support frame with an upper and lower interval, and the strip can pass between the two guide rollers.

[0012] Furthermore, the cold rolling mechanism includes an oil wiping and dust removal mechanism, a roughing roller, a finishing roller, a reverse roughing roller, and a cold rolling shell. Slots are provided at the front and rear ends of the cold rolling shell, and the strip and the pulling plate can pass through the slots. The oil wiping and dust removal mechanism is set up on the cold rolling shell and can clean and wipe the strip entering the cold rolling shell from the slot. The roughing roller, finishing roller, and reverse roughing roller are distributed in the cold rolling shell from front to back in sequence, and are used to cold roll the strip.

[0013] Furthermore, it also includes a flattening device, which has two groups. The two groups of flattening devices are respectively located at the front and rear sides of the cold rolling mechanism and are used to flatten the strip.

[0014] Furthermore, the leveling device includes a leveling plate, a leveling platform and a distance adjusting assembly, the leveling plate is installed directly above the leveling platform through the distance adjusting assembly, the strip can pass through the gap between the leveling plate and the leveling platform, and the distance adjusting assembly can adjust the gap between the leveling plate and the leveling platform.

[0015] Furthermore, it also includes a speed stabilizing device, which is close to the front end of the steel strip unwinding machine, and the speed stabilizing device can be clamped on the strip, and the strip can pass through the speed stabilizing device;

[0016] Furthermore, the speed stabilizing device includes a bottom support platform, a cantilever frame, a rotating shaft and a roller, the bottom support platform is arranged on the ground, the cantilever frame is located directly above the bottom support platform, the cantilever frame is a hollow frame, the bottom end surface of the cantilever frame is provided with an opening connected to its inner cavity, the rotating shaft is horizontally and rotatably arranged in the cantilever frame, the roller is arranged on the rotating shaft, and the outer edge of the roller extends from the opening to the outside of the cantilever frame, the strip passes between the top surface of the bottom support platform and the roller, and the upper and lower surfaces of the strip are respectively in contact with the support platform and the roller, and can move on the bottom support platform and the roller.

[0017] Furthermore, the speed stabilizing device also includes a first bevel gear, a second bevel gear, a mounting rod, a rotating disk and a fan blade, the first bevel gear is arranged on the rotating shaft and is spaced apart from the roller, the mounting rod is vertically arranged in the cantilever frame, and the inner top surface of the cantilever frame at the top of the mounting rod can be rotatably connected, the second bevel gear is fixed to the bottom end of the mounting rod and meshes with the first bevel gear, the outer wall of the rotating disk is prismatic, the rotating disk can be slidably sleeved on the mounting rod, and the side wall of the mounting rod is axially provided with a key pin protruding outward, the inner ring of the rotating disk is provided with a key slot, the key pin and the key slot can be slidably plugged into, there are multiple fan blades, and the multiple fan blades are circumferentially spaced apart on the outer wall of the rotating disk, the inner top surface of the cantilever frame is provided with a prismatic groove, and the prismatic groove is coaxially arranged with the mounting rod, and the top of the rotating disk can be inserted into the prismatic groove.

[0018] A cold rolling process for a finished steel strip, using the cold rolling device for a finished steel strip, comprises the following steps:

[0019] Two sets of steel strip uncoilers are used, and a cutting machine, a laser welding machine and a cold rolling mechanism are arranged in sequence from front to back between the two sets of steel strip uncoilers, and a steel coil is arranged on the front steel strip uncoiler, and a traction plate is arranged on the rear steel strip uncoiler;

[0020] The uncoilers on the front and rear sides unwind the strip, the head end of the strip passes through the cutting machine forward to the laser welding machine, the traction plate passes through the cold rolling mechanism to the laser welding machine, and the laser welding machine welds the head end of the strip with the end of the traction plate;

[0021] The front steel strip unwinder unwinds the strip, the rear steel strip unwinder rewinds the strip, and the cold rolling mechanism cold rolls the head and middle of the strip;

[0022] A second traction plate is set again on the front side steel strip unwinder, and the rear end of the strip blank is welded to the second traction plate by a laser welding machine;

[0023] The remaining portion of the strip tail end is unidirectionally rolled;

[0024] The entire strip is subjected to reverse cold rolling;

[0025] The strip blank and the traction plate are cut apart by a cutting machine;

[0026] The cold rolled steel coil is removed to complete the cold rolling.

[0027] Beneficial effects of the present invention:

[0028] When the above-mentioned cold rolling device and process for finishing the strip are used, firstly, the strip coil 1 is set on the front side steel strip uncoiler, and then the first traction plate is set on the rear side steel strip uncoiler; then, the front and rear side steel strip uncoilers are uncoiled, and the head end of the strip passes through the cutting machine forward to the laser welding machine, and the traction plate passes through the cold rolling mechanism to the laser welding machine, and the laser welding machine welds the head end of the strip with the end of the first traction plate; then, the rear side steel strip uncoiler is wound, and the cold rolling mechanism cold rolls the head and middle part of the strip; the head and middle part of the strip are completed. After the cold rolling of the first part, the tail end of the strip coil 1 is stopped just below the laser welding machine, a second traction plate is set again on the front steel strip uncoiler, and the rear end of the strip is welded to the second traction plate by the laser welding machine; then, the rear steel strip uncoiler continues to reel, and the remaining part of the tail end of the strip can be pulled into the cold rolling mechanism to continue unidirectional rolling; after the unidirectional rolling is completed, the entire strip is reversely cold rolled and repeatedly cold rolled; after the cold rolling is completed, the head end of the strip is cut off from the welding position of the traction plate by a cutting machine, and the strip coil after the cold rolling is removed.

[0029] The cold rolling device for finishing the strip uses the steel strip unwinding machines at both ends to repeatedly cold roll in both the forward and reverse directions. Compared with the traditional unidirectional cold rolling process, it has the advantages of uniform thickness and force of the rolled strip, which greatly reduces the possibility of defects such as cracking, folding, and delamination during the rolling process, ensuring the quality of the cold-rolled strip; at the same time, it can realize cold rolling of the leading and trailing ends of the strip, thereby further improving the quality of the steel strip and reducing steel waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0031] Figure 1 A schematic diagram of a cold rolling device for finishing a strip provided by an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of a laser welding machine in a cold rolling device for finishing a strip blank is shown;

[0033] Figure 3 for Figure 1 A schematic diagram of a speed stabilizing device in a cold rolling device for finishing a strip is shown;

[0034] Figure 4 for Figure 1 A schematic diagram of a cold rolling process for a finished strip is shown;

[0035] Reference numerals:

[0036] 100. Traction board;

[0037] 200. Steel strip uncoiler

[0038] 300, cold rolling mechanism; 310, oiling and dust removal mechanism; 320, roughing roller; 330, finishing roller; 340, reverse roughing roller; 350, cold rolling shell;

[0039] 400, laser welding machine; 410, second rotary power source; 420, welding table; 430, guide roller; 440, ball screw; 450, laser welding head; 460, welding machine support frame

[0040] 500, cutting machine; 510, cutting table; 520, first rotating power source; 530, knife; 540, rotating guide rod; 550, mounting frame;

[0041] 600, leveling device; 610, leveling plate; 620, leveling platform

[0042] 700, speed stabilizing device; 710, bottom support platform; 720, cantilever frame; 721, prism groove; 730, rotating shaft; 740, roller; 750, first bevel gear; 760, second bevel gear; 770, mounting rod; 771, key pin; 780, turntable. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0044] See also Figures 1 to 4 The present invention provides a cold rolling device for finishing a strip, comprising a traction plate 100, a steel strip uncoiler 200, a cold rolling mechanism 300, a laser welding machine 400 and a cutting machine 500. There are two traction plates 100, and the two traction plates 100 are used to pull the head end and the tail end of the strip respectively. There are two steel strip uncoilers 200, and the two steel strip uncoilers 200 are arranged at intervals. The steel strip uncoiler 200 can be provided with a strip roll 1 and a traction plate 100, and can drive the strip roll 1 and the traction plate 100 to uncoil;

[0045] The cold rolling mechanism 300 is arranged between the two steel strip uncoilers 200 and close to the steel strip uncoiler 200 at the rear side, and is used to cold roll the strip. The laser welding machine 400 is arranged between the cold rolling mechanism 300 and the steel strip uncoiler 200 at the front side, and is used to weld the leading end or the trailing end of the strip to the traction plate 100; the cutting machine 500 is arranged between the laser welding machine 400 and the steel strip uncoiler 200 at the front side, and is used to cut the strip and the traction plate 100.

[0046] When in use, firstly, a strip coil 1 is placed on the front side steel strip uncoiler 200, and then a first traction plate 100 is placed on the rear side steel strip uncoiler 200;

[0047] Subsequently, the steel strip unwinders 100 on the front and rear sides unwind, the head end of the strip passes through the cutting machine 500 forward to reach the laser welding machine 400, the traction plate 100 passes through the cold rolling mechanism 300 to reach the laser welding machine 400, and the laser welding machine 400 welds the head end of the strip with the end of the first traction plate 100; subsequently, the steel strip unwinder 200 on the rear side rewinds, and the cold rolling mechanism 300 cold rolls the head and middle part of the strip; after the cold rolling of the head and middle part of the strip is completed, the tail end of the strip roll 1 stays at the positive end of the laser welding machine 400. Below, a second traction plate 100 is set again on the front steel strip uncoiler 200, and the rear end of the strip is welded to the second traction plate 100 by the laser welding machine 400; then, the rear steel strip uncoiler 100 continues to reel, and the remaining part of the tail end of the strip can be pulled into the cold rolling mechanism 300 to continue unidirectional rolling; after completing the unidirectional rolling, the entire strip is reversely cold rolled and repeatedly cold rolled; after completing the cold rolling, the head end of the strip is cut apart from the welding position of the traction plate 100 by the cutting machine 500, and the strip coil after the cold rolling is removed.

[0048] The cold rolling device for finishing the strip uses the steel strip unwinders 200 at both ends to perform repeated cold rolling in both forward and reverse directions. Compared with the traditional unidirectional cold rolling process, it has the advantages of uniform thickness and force of the rolled strip, which greatly reduces the possibility of defects such as cracking, folding, and delamination during the rolling process, thereby ensuring the quality of the cold-rolled strip; at the same time, it can realize cold rolling of the leading and trailing ends of the strip, thereby further improving the quality of the steel strip and reducing the waste of steel.

[0049] In this embodiment, the laser welding machine 400 includes a second rotary power source 410, a welding table 420, a guide roller 430, a ball screw 440, a laser welding head 450 and a welding machine support frame 460. The welding table 420 is set on the ground, the second rotary power source 410 is set on the welding table 420, the welding machine support frame 460 is set adjacent to the welding table 420, the ball screw 440 is connected to the power output shaft of the second rotary power source 410, the laser welding head 450 is set on the ball screw 440, the ball screw 440 can drive the laser welding head 450 to move back and forth, and can weld the strip blank and the traction plate 100 on the welding table 420 together, the guide roller 430 is set on the welding machine support frame 460, there are two guide rollers 430, and the two guide rollers 430 are arranged on the welding machine support frame 460 at intervals up and down, and the strip blank can pass through between the two guide rollers 430, and the two guide rollers 430 play a guiding role on the steel plate.

[0050] When in use, the ball screw 440 is driven to rotate, which can drive the welding machine support frame 460 to move left and right, thereby achieving the purpose of further welding operation.

[0051] In this embodiment, the cutting machine 500 includes a cutting table 510, a first rotary power source 520, a gate knife 530, a rotating guide rod 540 and a mounting frame 550. The cutting table 510 is supported on the ground, a bracket is arranged above the gate knife 530, the first rotary power source 520 is arranged on the bracket, there are two rotating guide rods 540, one end of each of the two rotating guide rods 540 is hinged to the mounting frame 550, and the other end of one of the rotating guide rods 540 is hinged to the top of the bracket, and the other end of the other rotating guide rod 540 is arranged on the power output shaft of the first rotary power source 520, the lower part of the gate knife 530 is installed at the bottom of the mounting frame 550, and the gate knife 530 can cut on the strip blank.

[0052] When the cold rolling is completed, the cutting machine 500 is used to cut the head end of the strip from the traction plate 100, and the cold-rolled strip can be coiled off for the next cold rolling.

[0053] In this embodiment, the first rotating power source 520 drives the rotating guide rod 540, and the rotating guide rod 540 converts the rotation into the vertical movement of the gate knife 530, which can make the cutting more stable.

[0054] In this embodiment, the cold rolling mechanism 300 includes an oil wiping and dust removal mechanism 310, a roughing roller 320, a finishing roller 330, a reverse roughing roller 340, and a cold rolling shell 350. Slots are provided at the front and rear ends of the cold rolling shell 350, and the strip and the pulling plate can pass through the slots. The oil wiping and dust removal mechanism 310 is set on the cold rolling shell 350 and can clean and wipe the strip entering the cold rolling shell 350 from the slot. The roughing roller 320, the finishing roller 330, and the reverse roughing roller 340 are distributed in the cold rolling shell 350 from front to back in sequence for cold rolling the strip.

[0055] Specifically, the oiling and dusting mechanism 310 can be an ordinary brush or an oiling and dusting device made of plastic foam. When the strip passes through the oiling and dusting mechanism 310, the oil and dust on the surface of the strip can be removed to prevent the rollers and the strip from being crushed during cold rolling. The roughing roller 320 performs rough rolling on the strip, and the finishing roller 330 performs finishing rolling on the strip. The thickness of the strip gradually becomes thinner through the roughing roller 320 and the finishing roller 330. The shape and size of the reverse roughing roller 320 should be the same as that of the roughing roller 320, so that the cold rolling effect of the cold rolling mechanism 300 in both directions is consistent, thereby improving the convenience of the entire device.

[0056] As a preferred embodiment, the cold rolling device of the finished steel strip further includes a flattening device 600, which has two groups. The two groups of flattening devices 600 are respectively located at the front and rear sides of the cold rolling mechanism 300, and are used to flatten the strip. Specifically, the flattening device 600 includes a flattening plate 610, a flattening platform 620, and a distance adjustment component. The flattening plate 610 is installed above the flattening platform 620 through the distance adjustment component, and the strip can pass through the gap between the flattening plate 610 and the flattening platform 620, and the distance adjustment component can adjust the gap between the flattening plate 610 and the flattening platform 620.

[0057] When in use, the cold rolling of the cold rolling mechanism 300 can be further facilitated by the guidance and leveling of the leveling device 600. The distance adjustment component can be a screw type adjustment.

[0058] As a more preferred embodiment, the cold rolling device for finishing steel strip further comprises a speed stabilizing device 700. The speed stabilizing device 700 is close to the front end steel strip unwinder 200, and the speed stabilizing device 700 can be clamped on the strip blank, and the strip blank can pass through the speed stabilizing device 700.

[0059] During the cold rolling process, the strip is driven by the steel strip uncoiler 200 and passes through the speed stabilizing device 700 at a uniform speed. After the cutting is completed, the strip is separated from the traction plate 100. At this time, the tension of the traction plate 100 on the strip is released. At this time, since the speed stabilizing device 700 is clamped on the strip, a certain tension can be formed on the strip, so that the strip is slowly wound on the steel strip uncoiler 200.

[0060] Specifically, in this embodiment, the speed stabilizing device 700 includes a bottom support platform 710, a cantilever frame 720, a rotating shaft 730 and a roller 740. The bottom support platform 710 is arranged on the ground, the cantilever frame 720 is arranged directly above the bottom support platform 710, the cantilever frame 720 is a hollow frame, and the bottom end surface of the cantilever frame 720 is provided with an opening connected to its inner cavity, the rotating shaft 730 is arranged horizontally and rotatably in the cantilever frame 720, the roller 740 is arranged on the rotating shaft 730, and the outer edge of the roller 740 extends from the opening to the outside of the cantilever frame 720, the strip passes between the top surface of the bottom support platform 710 and the roller 740, and the upper and lower surfaces of the strip are respectively in contact with the support platform and the roller 740, and can move on the bottom support platform 710 and the roller 740.

[0061] During the cold rolling process, the strip is located between the support platform and the roller 740. When the strip moves, it drives the roller 740 to roll, allowing the strip to pass smoothly. At the same time, since the roller 740 and the bottom support platform 710 form a clamping force on the strip, a certain tensioning force can be formed on the strip, so that the strip is slowly wound on the steel strip unwinder 200.

[0062] In specific implementation, the height of the bottom support platform 710 can be set to be adjustable so that the gap between the bottom support platform 710 and the roller 740 is suitable for traction plates 100 or strips of different thicknesses, thereby forming a more effective clamping effect between the bottom support platform 710 and the roller 740.

[0063] As a more preferred embodiment, the speed stabilizing device 700 further includes a first bevel gear 750, a second bevel gear 760, a mounting rod 770, a rotating disk 780 and a fan blade. The first bevel gear 750 is arranged on the rotating shaft 730 and is arranged at intervals with the roller 740. The mounting rod 770 is vertically arranged in the cantilever frame 720, and the inner top surface of the cantilever frame 720 at the top of the mounting rod 770 can be rotatably connected. The second bevel gear 760 is fixed to the bottom end of the mounting rod 770 and meshes with the first bevel gear 750. The outer wall of the rotating disk 780 is prismatic, and the rotating disk 780 can be slidably sleeved on the mounting rod 770, and the side wall of the mounting rod 770 is axially provided with a key pin 771 protruding outwardly, and a key slot is provided on the inner ring of the rotating disk 780, and the key pin 771 can be slidably plugged with the key slot. There are multiple fan blades, and the multiple fan blades are circumferentially spaced apart. The outer wall of the rotating disk 780 is provided with a prism groove 721, and the prism groove 721 is coaxially arranged with the mounting rod 770, and the top of the rotating disk 780 can be inserted into the prism groove 721.

[0064] When the strip is cut and moves outward too fast, the roller 740 is driven to rotate rapidly, and then the shaft 730 is driven to rotate rapidly. The shaft 730 drives the mounting rod 770 to rotate rapidly through the first bevel gear 750 and the second bevel gear 760. The turntable 780 rotates rapidly along with the mounting rod 770, and the fan blades generate buoyancy. Under the action of the upper buoyancy, the turntable 780 moves upward along the axial direction of the mounting rod 770 until the top of the turntable 780 is inserted into the prismatic groove 721, thereby jamming the turntable 780 and preventing the mounting rod 770 from continuing to rotate, and then preventing the rotation of the rotating shaft 730 and the roller 740 through the first bevel gear 750 and the second bevel gear 760, thereby jamming the strip or traction belt between the roller 740 and the bottom support platform 710, preventing the strip or traction belt from continuing to move. After the speed of the strip or traction belt stops, the upper buoyancy of the turntable 780 disappears, and the turntable 780 slowly slides down and disengages from the prismatic groove 721, so that the jamming force of the strip or traction belt can be released, and the strip or traction belt can continue to move slowly.

[0065] By means of the speed stabilizing device 700, the speed of the strip or the traction belt can be stabilized within a certain range, thereby preventing the speed of the strip or the traction belt from being too fast. This makes it convenient to form a certain tensioning force on the strip after the strip is separated from the traction belt, so that the strip can be slowly wound on the steel strip uncoiler 200.

[0066] The present invention also provides a cold rolling process for finishing a strip, comprising the following steps:

[0067] S110, using two sets of steel strip uncoilers 200, and sequentially arranging a cutting machine 500, a laser welding machine 400 and a cold rolling mechanism 300 between the two sets of steel strip uncoilers 200 from front to back, and arranging a strip blank coil on the front steel strip uncoiler 200, and arranging a traction plate 100 on the rear steel strip uncoiler 200;

[0068] S120, the uncoilers at the front and rear sides unwind the strip, the leading end of the strip passes through the cutting machine 500 to reach the laser welding machine 400, the traction plate 100 passes through the cold rolling mechanism 300 to reach the laser welding machine 400, and the laser welding machine 400 welds the leading end of the strip with the end of the traction plate 100;

[0069] S130, the front steel strip unwinder 200 unwinds the strip, the rear steel strip unwinder 200 rewinds the strip, and the cold rolling mechanism 300 cold rolls the head and middle of the strip;

[0070] Specifically, the steel strip uncoiler 200 uncoils, the steel strip uncoiler 200 on the rear side reels the strip, and the cold rolling mechanism 300 cold rolls the head and middle part of the strip. When the tail end of the strip moves to just below the laser welding machine 400, the steel strip uncoilers 200 on the front and rear sides stop at the same time.

[0071] S140, setting a second traction plate 100 again on the front steel strip unwinder 200, and welding the rear end of the strip blank to the second traction plate 100 by a laser welding machine 400;

[0072] Specifically, a second traction plate 100 is set again on the front steel strip uncoiler 200. Then, when the front steel strip uncoiler 200 uncoils and transports the end of the second traction plate 100 to directly below the laser welding machine 400, the laser welding machine 400 welds the rear end of the strip blank to the second traction plate 100.

[0073] S150, unidirectionally rolling the remaining portion of the strip tail end;

[0074] Specifically, the rear side steel strip uncoiler 200 reels the strip, and the front side steel strip uncoiler 200 unwinds the strip, and the remaining portion of the tail end of the strip is unidirectionally rolled.

[0075] S160, performing reverse cold rolling on the entire strip;

[0076] Specifically, after the remaining portion of the strip tail end is unidirectionally rolled, the two steel strip unwinders 200 rotate in the opposite direction to reversely roll the entire strip, and the forward and reverse cold rolling can be repeated multiple times.

[0077] S170, cutting the strip and the traction plate 100 by the cutting machine 500;

[0078] Specifically, the connection portion between the strip blank and the pulling plate is located directly below the laser welding machine 400.

[0079] S180, removing the strip coil after the cold rolling is completed, and the cold rolling is completed.

[0080] Specifically, the strip coil after cold rolling is removed, the cold rolling is completed, and a new strip is replaced, and cold rolling can be performed again.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A cold rolling device for finishing a steel strip, characterized in that: include: There are two traction plates, and the two traction plates are used to pull the leading end and the trailing end of the strip respectively; A steel strip uncoiler, wherein there are two steel strip uncoilers, which are arranged at intervals, and the steel strip uncoilers can be provided with a strip blank coil and a traction plate, and can drive the blank coil and the traction plate to uncoil; A cold rolling mechanism, arranged between the two steel strip uncoilers and close to the steel strip uncoiler at the rear side, for cold rolling the strip; A laser welding machine, arranged between the cold rolling mechanism and the steel strip uncoiling machine at the front side, for welding the leading end or the trailing end of the strip to the traction plate; and A cutting machine, arranged between the laser welding machine and the steel strip unwinding machine at the front side, for cutting the strip blank and the traction plate; The cutting machine comprises a cutting table, a first rotating power source, a gate knife, a rotating guide rod and a mounting frame, wherein the cutting table is supported on the ground, a bracket is arranged above the gate knife, the first rotating power source is arranged on the bracket, there are two rotating guide rods, one end of each of the two rotating guide rods is hinged to the mounting frame, and the other end of one of the rotating guide rods is hinged to the top end of the bracket, and the other end of the other rotating guide rod is arranged on the power output shaft of the first rotating power source, the lower part of the gate knife is arranged at the bottom of the mounting frame, and the gate knife can cut on the strip blank; The laser welding machine comprises a second rotating power source, a welding table, a guide roller, a ball screw, a laser welding head and a welding machine support frame; the welding table is arranged on the ground, the second rotating power source is arranged on the welding table, the welding machine support frame is arranged adjacent to the welding table, the ball screw is connected to the power output shaft of the second rotating power source, the laser welding head is arranged on the ball screw, the ball screw can drive the laser welding head to move back and forth, and can weld the strip blank and the traction plate on the welding table together, the guide roller is arranged on the welding machine support frame, there are two guide rollers, the two guide rollers are arranged on the welding machine support frame with an upper and lower interval, and the strip blank can pass between the two guide rollers; The cold rolling mechanism includes an oiling and dusting mechanism, a roughing roller, a finishing roller, a reverse roughing roller, and a cold rolling shell. The front and rear ends of the cold rolling shell are provided with slots, through which the strip and the pulling plate can pass. The oiling and dusting mechanism is set up on the cold rolling shell and can clean and wipe the strip entering the cold rolling shell from the slot. The roughing roller, the finishing roller, and the reverse roughing roller are sequentially distributed in the cold rolling shell from front to back, and are used to cold roll the strip. It also includes a flattening device, which has two groups. The two groups of flattening devices are respectively located at the front and rear sides of the cold rolling mechanism, and are used to flatten the strip; It also includes a speed stabilizing device, which is close to the front end of the steel strip unwinding machine. The speed stabilizing device can be clamped on the strip blank, and the strip blank can pass through the speed stabilizing device.

2. A cold rolling device for finishing steel strip according to claim 1, characterized in that: The leveling device includes a leveling plate, a leveling platform and a distance adjusting assembly. The leveling plate is installed directly above the leveling platform through the distance adjusting assembly. The strip can pass through the gap between the leveling plate and the leveling platform, and the distance adjusting assembly can adjust the gap between the leveling plate and the leveling platform.

3. A cold rolling device for finishing a steel strip according to claim 2, characterized in that: The speed stabilizing device includes a bottom support platform, a cantilever frame, a rotating shaft and a roller. The bottom support platform is arranged on the ground, and the cantilever frame is located directly above the bottom support platform. The cantilever frame is a hollow frame, and the bottom end surface of the cantilever frame is provided with an opening connected to its inner cavity. The rotating shaft is horizontally and rotatably arranged in the cantilever frame, and the roller is arranged on the rotating shaft, and the outer edge of the roller extends from the opening to the outside of the cantilever frame. The strip passes between the top surface of the bottom support platform and the roller, and the upper and lower surfaces of the strip are respectively in contact with the support platform and the roller, and can move on the bottom support platform and the roller.

4. A cold rolling device for finishing a steel strip according to claim 3, characterized in that: The speed stabilizing device also includes a first bevel gear, a second bevel gear, a mounting rod, a rotating disk and a fan blade, the first bevel gear being arranged on the rotating shaft and spaced apart from the roller, the mounting rod being vertically arranged in the cantilever frame, and the inner top surface of the cantilever frame at the top of the mounting rod being rotatably connected, the second bevel gear being fixed to the bottom end of the mounting rod and meshing with the first bevel gear, the outer wall of the rotating disk being prismatic, the rotating disk being slidably sleeved on the mounting rod, and the side wall of the mounting rod being axially provided with a key pin protruding outward, the inner ring of the rotating disk being provided with a key slot, the key pin being slidably plugged into the key slot, the fan blades being provided with a plurality of them, and the plurality of fan blades being circumferentially spaced apart from each other on the outer wall of the rotating disk, the inner top surface of the cantilever frame being provided with a prismatic groove, and the prismatic groove being coaxially arranged with the mounting rod, and the top of the rotating disk being able to be inserted into the prismatic groove.

5. A cold rolling process for finishing a strip, characterized in that: A cold rolling device for finishing a steel strip according to any one of claims 1 to 4 comprises the following steps: Two sets of steel strip uncoilers are used, and a cutting machine, a laser welding machine and a cold rolling mechanism are arranged in sequence from front to back between the two sets of steel strip uncoilers, and a steel coil is arranged on the front steel strip uncoiler, and a traction plate is arranged on the rear steel strip uncoiler; The uncoilers on the front and rear sides unwind the strip, the head end of the strip passes through the cutting machine forward to the laser welding machine, the traction plate passes through the cold rolling mechanism to the laser welding machine, and the laser welding machine welds the head end of the strip with the end of the traction plate; The front steel strip unwinder unwinds the strip, the rear steel strip unwinder rewinds the strip, and the cold rolling mechanism cold rolls the head and middle of the strip; A second traction plate is set again on the front side steel strip unwinder, and the rear end of the strip blank is welded to the second traction plate by a laser welding machine; The remaining portion of the strip tail end is unidirectionally rolled; The entire strip is subjected to reverse cold rolling; The strip blank and the traction plate are cut apart by a cutting machine; The cold rolled steel coil is removed to complete the cold rolling.

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