Composite rolling system for strip

Abstract

The present invention discloses a composite rolling system for seamless strips, comprising a plurality of uncoilers for releasing strips; a plurality of heating furnaces for heating the strips released by the uncoilers, with a heating furnace arranged downstream of each uncoiler; a rolling mill for rolling the strips entering the rolling mill; an annealing furnace located downstream of the rolling mill for annealing the strips outputted from the rolling mill; a cooling furnace located downstream of the annealing furnace for cooling the strips outputted from the annealing furnace; a coiler located downstream of the cooling furnace for coiling the cooled strips; a shearing device located between the cooling furnace and the coiler, with the coiler shearing the strips after completing the coiling of a single coil of strips. The present invention has the advantages of saving production time and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of strip rolling, and in particular to a composite rolling system for strips. Background Art

[0002] It is well known in the rolling mill manufacturing industry that traditional rolling mills can only roll a thicker strip thinner, and the uses of the rolled strip are limited. For example, in order to have the light weight and high heat transfer performance of aluminum, and the high strength and corrosion resistance of stainless steel, it is necessary to compound a layer of stainless steel strip or other metal strip on both sides of the aluminum strip, which cannot be achieved using traditional rolling mills. Therefore, the strip rolled by traditional rolling mills can only meet the requirements of strips of a single material, but cannot meet the requirements of strips of composite materials, and the scope of application is not wide.

[0003] CN2822812Y discloses a warm composite rolling, which includes an unwinder, a roller mill, and a coiler. The unwinder, a heating device, a two-roll mill, a cooling device, and a coiler are arranged on the frame in sequence. The number of unwinders is two or three, the heating device is a heating furnace, and the cooling device is an air cooling device. The warm composite rolling mill adopts a warm composite process, which can perform composite processing on some metals that are not suitable for traditional cold composite rolling mills and hot composite rolling mills.

[0004] The above-mentioned warm composite rolling mill is designed as a two-layer or three-layer composite rolling mill. After the metal strip enters the heating furnace, it is continuously heated online. Under the combined effect of thermal energy and the mechanical pressure of the rolling mill, the original independent two-layer or three-layer metal interfaces achieve atomic spacing, that is, there is sufficient bonding force between the interfaces (in the subsequent diffusion annealing, the bonding force between the bonding interfaces is further strengthened), and its thickness is also decreasing. The composite strip is then air-cooled at the outlet and then further processed.

[0005] For the above-mentioned warm composite rolling mill, although it can complete the rolling, cooling and coiling of multiple layers of metal, the coiling can only produce semi-finished composite strips. This composite strip needs to be further processed on other equipment before it can become a qualified product. When processed on other equipment, the composite strip needs to be transported, re-unrolled and coiled. Obviously, these operations waste time and reduce production efficiency. Summary of the invention

[0006] The invention provides a composite rolling system for strip materials which can save production time and improve production efficiency.

[0007] The technical solution to achieve the above purpose is as follows:

[0008] Composite rolling system for strip, including:

[0009] multiple decoilers for releasing the strip;

[0010] A plurality of heating furnaces for heating the strip released from the uncoiler, with one heating furnace being arranged downstream of each uncoiler;

[0011] A rolling mill is used to roll the strip entering the rolling mill;

[0012] The annealing furnace located downstream of the rolling mill anneals the strip output from the rolling mill;

[0013] A cooling furnace located downstream of the annealing furnace cools the strip output from the annealing furnace;

[0014] A coiler located downstream of the cooling furnace, which coils the cooled strip;

[0015] The shearing device is located between the cooling furnace and the coiler. The coiler shears the strip after completing the coiling of a single strip.

[0016] The present invention integrates the processes of rolling, heat treatment of the rolled strip, coiling, shearing and the like on the same production line. The production line has the advantages of saving time, high rolling efficiency and good plate shape. In addition, the present invention has the characteristics of saving time and effort in changing rolls and is very safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the composite rolling system for strip of the present invention;

[0018] Figure 2 It is the main view of the rolling mill;

[0019] Figure 3 For Figure 2 A schematic diagram with some parts hidden on the basis;

[0020] Figure 4 For Figure 3 A schematic diagram with some parts hidden on the basis;

[0021] Figure 5 It is a cross-sectional view of the working roll changing mechanism;

[0022] Figure 6 is a three-dimensional diagram of the fixed seat;

[0023] Figure 7 is a three-dimensional diagram of the swing block;

[0024] Figure 8 It is a schematic diagram of the cooperation between the rotating guide rail assembly and the built-in guide rail;

[0025] Fig. 9 A schematic perspective view of an anti-wrinkle stabilizing roller;

[0026] Fig.10 It is a cross-sectional view of the combination of the anti-wrinkle stabilizing roller and the archway;

[0027] Markings in the attached drawings:

[0028] Uncoiler A, heating furnace B, stainless steel strip X0, aluminum strip X1, stainless steel strip X2;

[0029] Rolling mill C, arch 1, built-in guide rail 1a, working roll assembly 2, support roll assembly 3, working roll drive assembly 4, roll changing assembly 5, fixed seat 5a, swing block 5b, elastic assembly 5c, first mounting hole 5d, second mounting hole 5e, third mounting hole 5f, passive part 5g, hinged part 5h, abutment top 5i, top pin 5j, spring 5k, connecting rod 5m, roll changing driver 6, linear driver 6a, thrust ring 6b, bracket assembly 7, frame 7a, bracket arm 7b, swing cylinder 7c, roller 7d, rotating guide rail assembly 8, support seat 8a, hinged frame 8b, external guide rail 8c, first cylinder 8d, second cylinder 8e;

[0030] Annealing furnace D, cooling furnace E, coiler F, shearing device G, pinch roller H, straightening machine I, leveling roller J, leveling machine L, welding machine M, coupling U, strip Y;

[0031] Anti-wrinkle stabilizing roller N, bracket 20, first bearing 20a, driver 21, swing cylinder 21a, drive shaft 21b, rotating shaft 22, second bearing 22a, self-rotating roller 23, rotating arm 24, core shaft 25, third bearing 25a, revolving roller 26, channel T. DETAILED DESCRIPTION

[0032] like Figures 1 to 10 As shown, the composite rolling system of the strip of the present invention comprises: an unwinder A, a heating furnace B, a rolling mill C, an annealing furnace D, a cooling furnace E, and a coiler F. Each part and the relationship between the parts are described in detail below:

[0033] There are multiple uncoilers A, and each uncoiler A is equipped with a wound strip. In the present embodiment, there are three uncoilers A, and the three uncoilers A are arranged in three layers of upper, middle and lower to form a multi-layer structure, wherein the uncoiler A located on the upper layer is equipped with a stainless steel strip X0, the uncoiler A located on the middle layer is equipped with an aluminum strip X1, and the uncoiler A located on the lower layer is equipped with a stainless steel strip X2. The stainless steel strip X0 is released from the uncoiler A located on the upper layer, the aluminum strip X1 is released from the uncoiler A located on the middle layer, and the stainless steel strip X2 is released from the uncoiler A located on the lower layer.

[0034] The heating furnace B is used to heat the strip released by the uncoiler A. In this embodiment, there are three heating furnaces B, one heating furnace B is set downstream of each uncoiler A, and the three heating furnaces B are also arranged in three layers, upper, middle and lower, to form a multi-layer structure, wherein the heating furnace B located in the upper layer heats the released stainless steel strip X0, the heating furnace B located in the middle layer heats the released aluminum strip X1, and the heating furnace B located in the lower layer heats the released stainless steel strip X2. Different materials are heated to different temperatures, for example, stainless steel strips X0 and stainless steel strips X2 are heated to 180 to 220°C, and aluminum strip X1 is heated to 350 to 450°C.

[0035] Although three uncoilers A and three heating furnaces B are set up above, in actual use, the number of uncoilers A and heating furnaces B to be started can be selected as needed. For example, when only one roll of raw material needs to be rolled, one uncoiler A and heating furnace B can be selected. If a composite strip needs to be rolled, two uncoilers A and heating furnaces B, or three uncoilers A and heating furnaces B can be selected.

[0036] The rolling mill C rolls the strips entering the rolling mill C. In this embodiment, after the stainless steel strip X0, the aluminum strip X1, and the stainless steel strip X2 enter the rolling mill C respectively, the three strips are combined into one under the rolling force of the rolling mill C. Since the aluminum strip X1 is softened when heated to 350 to 450°C, and the stainless steel strips X0 and X2 are also heated to 180 to 220°C, the rolling mill C can easily combine the three strips into one to form a composite strip during rolling.

[0037] In this embodiment, the rolling mill C includes an archway 1, a working roll assembly 2, a backup roll assembly 3, a working roll drive assembly 4, and a working roll changing mechanism. The working roll assembly 2 is arranged on the archway 1, and backup roll assemblies 3 are respectively arranged on both sides of the working roll assembly 2, and the backup roll assembly 3 is connected to the archway 1, and the working roll drive assembly 4 is connected to the working roll assembly 2. For the rolling mill C with the above structure, the archway 1, the working roll assembly 2, the backup roll assembly 3, and the working roll drive assembly 4 are all structures disclosed in the prior art, and will not be repeated here. For the working roll changing mechanism, this embodiment is a new structure relative to the prior art, which is as follows:

[0038] The working roll changing mechanism in this embodiment includes a roll changing combination assembly 5 and a roll changing driver 6. The roll changing combination assembly 5 is fixed to the working roll assembly 2. The roll changing driver 6 is used to combine with the roll changing combination assembly 5 to move the working roll assembly 2. The roll changing driver 6 is located on one side of the arch 1.

[0039] The roller changing assembly 5 includes a fixed seat 5a, a swing block 5b, and an elastic assembly 5c. The fixed seat 5a is provided with a first mounting hole 5d, a second mounting hole 5e, and a third mounting hole 5f. The first mounting hole 5d and the second mounting hole 5e are arranged along the axial direction of the fixed seat 5a. The first mounting hole 5d and the second mounting hole 5e are connected to form a step hole. The third mounting hole 5f is arranged along the radial direction of the fixed seat 5a, and the third mounting hole 5f is connected to the second mounting hole 5e.

[0040] The swing block 5b is driven by the end of the roller changing driver 6 to swing and reset after the swinging to cooperate with the end of the roller changing driver 6. The swing block 5b is hinged to the fixed seat 5a. The swing block 5b includes a passive part 5g, a hinged part 5h and an abutting top part 5i. The passive part 5g is fixed to the abutting top part 5i. The passive part 5g is used to cooperate with the end of the roller changing driver 6. At least a part of the passive part 5g is located outside the first mounting hole 5d. The abutting top part 5i is located in the first mounting hole 5d. One end of the hinged part 5h is fixed to the abutting top part 5i. The other end of the hinged part 5h is inserted into the second mounting hole 5e. The hinged part 5h passes through the third mounting hole 5f and the hinged part 5h, so that the hinged part 5h is hinged to the fixed seat 5a.

[0041] One end of the elastic component 5c is fixed to the fixed seat 5a, and the other end of the elastic component 5c abuts against the swing block 5b. The elastic component 5c includes a top pin 5j, a spring 5k and a connecting rod 5m. The top pin 5j abuts against the abutting portion 5i of the swing block 5b under the tension of the spring 5k. The spring 5k is sleeved on the connecting rod 5m. One end of the spring 5k cooperates with the top pin 5j, and the other end of the spring 5k cooperates with the connecting rod 5m or the fixed seat 5a. One end of the connecting rod 5m is fixed to the fixed seat 5a, and the other end of the connecting rod 5m cooperates with the top pin 5j.

[0042] The roller changing drive 6 includes a linear drive 6a and a thrust ring 6b. The linear drive 6a can adopt linear drive components such as hydraulic cylinders and air cylinders. The linear drive 6a preferably adopts an oil cylinder. The thrust ring 6b is fixed to the power output end of the linear drive 6a. The outer diameter of the thrust ring 6b is larger than the outer diameter of the power output end of the linear drive 6a.

[0043] When the working roll assembly 2 is worn and needs to be replaced with a new working roll assembly 2, the worn working roll assembly 2 installed on the archway 1 must be unloaded before the new working roll assembly 2 can be loaded on the archway 1. The worn working roll assembly 2 must be unloaded through the working roll changing mechanism. The working process of the working roll changing mechanism is as follows:

[0044] The linear drive 6a drives the thrust ring 6b to feed toward the position of the roll-changing assembly 5. When the thrust ring 6b touches the passive part 5g of the swing block 5b, the feeding force of the thrust ring 6b is transmitted to the passive part 5g. The passive part 5g rotates around the hinged part. During the rotation, the elastic component 5c is compressed by the abutment top 5i. After the swing block 5b rotates to clear the thrust ring 6b, the swing block 5b is reset under the tension of the elastic component 5c. At this time, the fixed seat 5a and the thrust ring 6b form an abutment, and the driver 6 continues to feed. The driver 6 forms a pushing force on the roll-changing assembly 5, so that the working roll assembly 2 fixed to the roll-changing assembly 5 moves to the other side of the arch (the other side is the operating side of the arch) under the pushing force, and finally the worn working roll assembly 2 is unloaded from the arch 1.

[0045] When assembling the new working roll part 2 with the arch 1, after sending the new working roll part 2 to the rotating guide rail assembly 8, the driver 6 repeats the above-mentioned process of unloading the working roll part 2, and then when the swing block 5b is reset under the tension of the elastic component 5c, the driver 6 loads the retraction force to the passive part 5g through the thrust ring 6b when retreating. Since the fixed seat 5a and the thrust ring 6b form abutment at this time, the driver 6 continues to exert a retraction effect, and the driver 6 applies a dragging force to the roll changing combination assembly 5, so that the working roll assembly 2 fixed to the roll changing combination assembly 5 moves toward the side of the arch (one side is the driving side of the arch) under the dragging force, and finally the new working roll assembly 2 reaches a position that fully matches the arch 1.

[0046] The rolling mill C further includes a bracket assembly 7 and a rotating guide rail assembly 8. The bracket assembly 7 is used to hold up the coupling U when changing the working roll assembly 2. The bracket assembly 7 is arranged on one side of the archway 1, that is, the bracket assembly 7 is located on the driving side of the archway 1. Since the working roll assembly 2 is connected to the driving device (driving the working roll assembly 2 to rotate) through the coupling U, when unloading the working roll assembly 2, the coupling U must be separated from the working roll assembly 2 before unloading. In this way, only one set of couplings U is required to be applicable to old or new working roll assemblies 2.

[0047] The bracket assembly 7 includes a symmetrically arranged frame 7a and multiple swing arm assemblies, wherein each swing arm assembly includes a supporting arm 7b and a swing cylinder 7c, one end of the supporting arm 7b is hinged to the frame 7a, and the other end of the supporting arm 7b is connected to the swing cylinder 7c, and the swing cylinder 7c is fixedly connected to the frame 7a. Preferably, a roller 7d is provided on the supporting arm 7b, and the roller 7d is rotatably mounted on the supporting arm 7b.

[0048] When the coupling U needs to be supported, the swing cylinder 7c works to push the supporting arm 7b to swing toward the coupling U, so that the roller 7d on the supporting arm 7b cooperates with the coupling U, and the coupling U is supported by the bracket assembly 7. When the working roll assembly 2 is unloaded and the new working roll assembly 2 is dragged toward the driving side by the driver 6, the working roll assembly 2 is close to the coupling U supported by the bracket assembly 7. As the dragging continues, the shaft head of the working roll assembly 2 is gradually inserted into the coupling U to form a match with the coupling U. After the new working roll assembly 2 is in place and fastened with the coupling U, the swing cylinder 7c in the bracket assembly 7 is reset, so that the swing arm assembly is reset, and the coupling U supported by the swing arm assembly and the shaft head of the working roll assembly 2 form support for the coupling U.

[0049] The rolling mill C also includes a rotating guide rail assembly 8, which is movably arranged on the other side of the arch 1, that is, the rotating guide rail assembly 8 is located on the operating side of the arch 1. The rotating guide rail assembly 8 has a first switching position in which it is in an open state when replacing a new working roll assembly 2, and a second switching position in which it is in a retracted state after the replacement of the new working roll is completed.

[0050] The guide rail assembly 8 includes a support seat 8a, an articulated frame 8b, an external guide rail 8c, a first oil cylinder 8d, and a second oil cylinder 8e. The support seat 8a is fixed to the arch 1, the articulated frame 8b is articulated to the support seat 8a, and the power output end of the first oil cylinder 8d is connected to the articulated frame 8b. Under the power of the first oil cylinder 8d, the articulated frame 8b can swing relative to the arch 1. One end of the external guide rail 8c is articulated to the articulated frame 8b. The external guide rail 8c cooperates with the internal guide rail 1a installed in the arch 1, and is used to guide the working roll assembly 2 when unloading the working roll assembly 2 or loading a new working roll assembly 2.

[0051] On the other hand, since the external guide rail 8c is located on the outside of the arch 1, when unloading the working roll assembly 2, a receiving device (such as a roll changing trolley) is usually used to receive one end of the working roll assembly 2. When the other end of the working roll assembly 2 is completely separated from the internal guide rail 1a and supported by the external guide rail 8c, since both ends of the working roll assembly 2 are in a supported state and are not blocked by other parts in the rolling mill C, the working roll assembly 2 can be directly lifted away by the hoist. Therefore, the external guide rail 8c is helpful to save the time of roll changing.

[0052] The second oil cylinder 8e is connected to the articulated frame 8b and the external guide rail 8c respectively. Preferably, the power output end of the second oil cylinder 8e is articulated to the external guide rail 8c.

[0053] When replacing the working roll assembly 2 and requiring the external guide rail 8c to cooperate with the internal guide rail 1a, the first oil cylinder 8d drives the articulated frame 8b to swing toward the inner side of the arch 1. When the articulated frame 8b swings into place, the second oil cylinder 8e drives the external guide rail 8c to swing, so that the external guide rail 8c forms a combined state with the end of the internal guide rail 1a.

[0054] After the work roll assembly 2 is replaced, in order to prevent the guide rail assembly 8 from causing collision with the operator or occupying the operating space on the operating side of the rolling mill, the second oil cylinder 8e drives the external guide rail 8c to swing so that the external guide rail 8c is in a retracted state, and the first oil cylinder 8d drives the articulated frame 8b to swing toward the outside of the arch 1 to make room for the operation. This structure ensures the safety of the operator without occupying the space on the operating side.

[0055] The annealing furnace D is located downstream of the rolling mill C, and the annealing furnace D anneals the strip Y output from the rolling mill C; the cooling furnace E is located downstream of the annealing furnace D, and cools the strip Y output from the annealing furnace D. If the strips entering the rolling mill C are stainless steel strip X0, aluminum strip X1, and stainless steel strip X2, respectively, the rolling mill C rolls the three layers of strips to obtain a composite strip Y. In order to make the metallographic structure of the composite strip Y meet the use requirements, the strip Y output from the rolling mill C is annealed and cooled. The temperature in the annealing furnace D is selected according to the material of the strip. In this embodiment, 300°C is used.

[0056] The coiler F is located downstream of the cooling furnace E. The coiler F coils the cooled strip Y. The coiling volume is set according to needs. However, when the strip Y is coiled to the set volume, it is necessary to cut the strip Y to avoid affecting continuous production. Therefore, in this embodiment, a shearing device G is arranged between the cooling furnace E and the coiler F. After the coiler F completes the coiling of a single roll of strip Y, the shearing device G cuts the strip Y.

[0057] This embodiment further includes a pinch roller H located downstream of the uncoiler A, and the pinch roller H provides power for the conveying of the strip. The number of the pinch roller H is at least one, and at least a pinch roller H is installed downstream of the uncoiler A located in the middle layer. In this embodiment, three pinch rollers H are provided, and a pinch roller H is arranged downstream of each uncoiler A.

[0058] This embodiment further includes at least one straightening machine I for straightening the head of the strip, and the straightening machine I is located between the uncoiler A and the heating furnace B. There is at least one straightening machine I, and at least one straightening machine I is installed downstream of the uncoiler A located in the middle layer. The head of the raw strip is straightened by the straightening machine I before entering the heating furnace B for heating.

[0059] This embodiment further includes a leveling roller J, which is arranged between the annealing furnace D and the rolling mill C and / or between the annealing furnace D and the cooling furnace E. The leveling roller J performs leveling treatment on the rolled strip Y to make the surface of the strip Y flat and improve the quality of the strip.

[0060] It also includes a leveler L, which is located between the cooling furnace E and the shearing device G. The leveler L performs leveling treatment on the heat-treated strip Y again to further improve the surface flatness of the strip Y, so that the quality of the strip Y finally coiled by the coiler is guaranteed.

[0061] It also includes a welding machine M for welding the rolled strip, and the welding machine M is located between the rolling mill C and the annealing furnace D. When the raw strip on the uncoiler A is used up, the strip Y output from the rolling mill C has a tail, and when a new raw strip is loaded on the uncoiler A and continues to be rolled, the new strip Y output from the rolling mill C has a head. The welding machine M welds the tail and head of the two sections of the head into one, so that the strip wound on the coiler F is in a continuous state.

[0062] The stabilizing roller used in the prior art is a single roller, and a wrap angle is formed between the single roller and the strip. However, the angle of this single roller is usually not adjustable. In the actual rolling process, strips of different models and thicknesses are often faced. Since the angle of the single roller cannot be adjusted, the required wrap angles are different for strips of different thicknesses. Therefore, during the rolling process of the rolling mill C, due to the unreasonable structure of the stabilizing roller, the strip often has waves, vibrations, noises, etc. during the rolling process. The waves and vibrations can easily cause wrinkles on the surface of the thin strip.

[0063] In this regard, the present embodiment further includes an anti-wrinkle stabilizing roller N, which is located between the heating furnace B and the rolling mill C. The anti-wrinkle stabilizing roller N forms an S shape to the strip passing through the anti-wrinkle stabilizing roller N.

[0064] The wrinkle-proof stabilizing roller N of the present invention comprises a bracket 20, a rotation component, a revolution component rotating around the rotation component, and a driver 21. The two ends of the rotation component are respectively connected to the bracket 20; the revolution component cooperates with the rotation component, or the revolution component is connected to the bracket 20, the driver 21 is connected to the rotation component to drive the revolution component to rotate around the rotation component, or the driver 21 is connected to the revolution component to drive the revolution component to rotate around the rotation component, and a channel T is left between the rotation component and the revolution component for the strip to pass through.

[0065] Since the present invention adopts a two-roller type, the strip cooperates with the revolution component to form a wrap angle and then passes through the channel, and then cooperates with the rotation component to form a wrap angle, so that the strip forms an S shape. This form can keep the strip tension and avoid wrinkles. Since the revolution component can rotate around the rotation component, the position of the revolution component can be adjusted according to the needs of the strip, so that the wrap angle between the strip and the rotation component and the revolution component can be changed to meet the needs of different strips for the wrap angle.

[0066] The anti-wrinkle stabilizing roller is located on one side of the arch 1, so that the anti-wrinkle stabilizing roller is close to the roller, so that the strip maintains tension between the anti-wrinkle stabilizing roller and the roller, further avoiding the formation of wrinkles in the strip. The driver 21 can be a structure composed of a swing cylinder 21a and a drive shaft 21b, or a structure driven by a motor, a reducer, and a drive shaft. In this embodiment, the driver 21 preferably adopts a structure composed of a swing cylinder 21a and a drive shaft 21b.

[0067] Preferably, the self-rotating assembly includes a rotating shaft 22 and a rotating roller 23. Both ends of the rotating shaft 22 are rotatably connected to the bracket 20 respectively, and the rotating shaft 22 is connected to the driver 21. The driver 21 and the self-rotating shaft 22 are preferably connected by a spline, which has a large transmission torque and is easy to disassemble.

[0068] The self-rotating roller 23 is sleeved on the rotating shaft 22, and the self-rotating roller 23 and the rotating shaft 22 form a rotatable fit. A first bearing 20a is installed on the bracket 20, and both ends of the rotating shaft 22 are connected to the first bearing 20a, so that the rotating shaft 22 can rotate relative to the bracket 20 when subjected to torque. A second bearing 22a is provided on the rotating shaft 22, and the self-rotating roller 23 cooperates with the second bearing 22a, so that the self-rotating roller 23 can rotate relative to the rotating shaft 22.

[0069] The revolution assembly includes a rotation arm 24, a core shaft 25, and a revolution roller 26. One end of the rotation arm 24 is fixed to the rotation assembly. In this embodiment, one end of the rotation arm 24 is fixed to the rotation shaft 22. A plurality of flat portions are provided on the circumferential surface of the rotation shaft 22. A first through hole is provided at one end of the rotation arm 24. A plurality of flat portions are also provided in the first through hole. The flat portions in the first through hole cooperate with the flat portions on the rotation shaft 22, so that one end of the rotation arm 24 is circumferentially fixed to the rotation shaft 22. The core shaft 25 is connected to the other end of the rotation arm 24. A plurality of flat portions are provided on the circumferential surface of the core shaft 25. A second through hole is provided at the other end of the rotation arm 24. A plurality of flat portions are also provided in the second through hole. The flat portions in the second through hole cooperate with the flat portions on the core shaft 25, so that one end of the rotation arm 24 is circumferentially fixed to the core shaft 25. The revolution roller 26 is sleeved on the core shaft 25, and the revolution roller 26 and the core shaft 25 form a rotatable fit. The mandrel 25 is provided with a third bearing 25a, and the revolving roller 26 cooperates with the third bearing 25a, so that the revolving roller 26 can rotate relative to the mandrel 25. In the present invention, the axis of the rotating roller 23 and the axis of the revolving roller 26 are combined into one, with a compact structure and good rigidity.

[0070] When the strip cooperates with the revolving roller 26 in the revolving assembly to form a wrap angle, it passes through the channel T and then cooperates with the self-rotating roller 23 in the self-rotating assembly to form a wrap angle. The wrap angle is selected according to the needs of the strip, specifically: the driver 21 is controlled to work, the driver 21 drives the rotating shaft 22 to rotate, the rotating shaft 22 drives the rotating arm 24 to rotate, and the rotating arm 24 drives the mandrel 25 and the revolving roller 26 to revolve around the self-rotating assembly, thereby changing the position of the revolving assembly, and then changing the wrap angle between the strip and the revolving roller 26 and the self-rotating roller 23. After the position of the revolving assembly is determined, it can be moved to start the rolling work. During the movement of the strip, the friction between the revolving roller 26 and the self-rotating roller 23 causes the revolving roller 26 and the self-rotating roller 23 to rotate.

[0071] (1) A two-roller type is adopted. The strip cooperates with the revolving component to form a wrap angle and then passes through the channel. Then, it cooperates with the rotating component to form a wrap angle. This makes the strip form an S shape, which can increase the tension on the strip and avoid wrinkles on the surface of the strip.

[0072] (2) The two rollers are divided into a self-rotating roller and a revolving roller. Since the revolving component revolves around the self-rotating component under the drive of the driver, the wrap angle between the strip and the roller can be adjusted to meet the needs of rolling strips of different thicknesses.

[0073] (3) Since the revolution component cooperates with the rotation component, the driver is connected to the rotation component to drive the revolution component to rotate around the rotation component. This structure makes a part of the rotation component and the revolution component a common part, which has the characteristics of compact structure and good rigidity.

[0074] The above description is only an illustrative specific implementation mode of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any technician in the field without departing from the concept and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A composite rolling system for strip material, characterized in that: include: a plurality of uncoilers (A) for releasing the strip; A plurality of heating furnaces (B) for heating the strip released by the uncoiler (A), wherein a heating furnace (B) is arranged downstream of each uncoiler (A); A rolling mill (C) is used to roll the strip entering the rolling mill (C); An annealing furnace (D) located downstream of the rolling mill (C) anneals the strip output from the rolling mill (C); A cooling furnace (E) located downstream of the annealing furnace (D) cools the strip output from the annealing furnace (D); a coiler (F) located downstream of the cooling furnace (E), the coiler (F) coils the cooled strip; a shearing device (G) located between the cooling furnace (E) and the coiler (F), which shears the strip after completing the coiling of a single strip; The rolling mill (C) comprises an archway (1), a working roll assembly (2), a support roll assembly (3), a working roll drive assembly (4), and a working roll changing mechanism, wherein the working roll assembly (2) is arranged on the archway (1); support roll assemblies (3) are respectively arranged on both sides of the working roll assembly (2), and the support roll assembly (3) is connected to the archway (1); the working roll drive assembly (4) is connected to the working roll assembly (2); the working roll changing mechanism comprises a roll changing combination assembly (5) and a roll changing drive (6) used for combining with the roll changing combination assembly (5) to move the working roll assembly (2), and the roll changing combination assembly (5) is fixed to the working roll assembly (2); the roll changing drive (6) is located on one side of the archway (1); The roller-changing assembly (5) comprises a fixed seat (5a), a swing block (5b), and an elastic assembly (5c); the fixed seat (5a) is provided with a first mounting hole (5d), a second mounting hole (5e), ​​and a third mounting hole (5f); the first mounting hole (5d) and the second mounting hole (5e) are arranged along the axial direction of the fixed seat (5a); the first mounting hole (5d) and the second mounting hole (5e) are connected to form a stepped hole; the third mounting hole (5f) is arranged along the radial direction of the fixed seat (5a); and the third mounting hole (5f) is connected to the second mounting hole (5e); The swing block (5b) is driven by the end of the roller changing driver (6) to swing and reset to cooperate with the end of the roller changing driver (6) after the swinging ends. The swing block (5b) is hinged to the fixed seat (5a). The swing block (5b) comprises a passive part (5g), a hinged part (5h) and an abutting top part (5i). The passive part (5g) is fixed to the abutting top part (5i). The passive part (5g) is used to cooperate with the end of the roller changing driver (6). At least a part of the passive part (5g) is located outside the first mounting hole (5d). The abutting top part (5i) is located in the first mounting hole (5d). One end of the hinged part (5h) is fixed to the abutting top part (5i). The other end of the hinged part (5h) is inserted into the second mounting hole (5e). The hinged part passes through the third mounting hole (5f) and the hinged part (5h), so that the hinged part (5h) and the fixed seat (5a) are hinged. One end of the elastic component (5c) is fixed to the fixed seat (5a), and the other end of the elastic component (5c) is abutted against the swing block (5b). The elastic component (5c) comprises a push pin (5j), a spring (5k) and a connecting rod (5m). The push pin (5j) abuts against the abutting portion (5i) of the swing block (5b) under the tension of the spring (5k). The spring (5k) is sleeved on the connecting rod (5m). One end of the spring (5k) cooperates with the push pin (5j), and the other end of the spring (5k) cooperates with the connecting rod (5m) or the fixed seat (5a). One end of the connecting rod (5m) is fixed to the fixed seat (5a), and the other end of the connecting rod (5m) cooperates with the push pin (5j). The roller changing driver (6) comprises a linear driver (6a) and a thrust ring (6b), wherein the thrust ring (6b) is fixed to a power output end of the linear driver (6a), and an outer diameter of the thrust ring (6b) is greater than an outer diameter of the power output end of the linear driver (6a); The linear drive (6a) drives the thrust ring (6b) to feed toward the location of the roller-changing assembly (5). When the thrust ring (6b) touches the passive part (5g) of the swing block (5b), the feeding force of the thrust ring (6b) is transmitted to the passive part (5g). The passive part (5g) rotates around the hinged part. During the rotation, the elastic component (5c) is compressed by the abutment top (5i). When the swing block (5b) rotates to clear the thrust ring (6b), the swing block (5b) is reset under the tension of the elastic component (5c). At this time, the fixed seat (5a) and the thrust ring (6b) form an abutment, and the drive (6) continues to exert a feeding effect. The drive (6) forms a pushing force on the roller-changing assembly (5), so that the working roller assembly (2) fixed to the roller-changing assembly (5) moves to the other side of the arch under the pushing force, and finally the worn working roller assembly (2) is unloaded from the arch (1).

2. The composite rolling system for strip according to claim 1, characterized in that: Also includes: The pinch roller (H) is located downstream of the uncoiler (A) and provides power for the conveying of the strip.

3. The composite rolling system for strip according to claim 1, characterized in that: Also includes: At least one straightening machine (I) for straightening the head of the strip, the straightening machine (I) is located between the uncoiler (A) and the heating furnace (B).

4. The composite rolling system for strip material according to claim 1, characterized in that: The invention also comprises a leveling roller (J), which is arranged between the annealing furnace (D) and the rolling mill (C) and / or between the annealing furnace (D) and the cooling furnace (E).

5. The composite rolling system for strip material according to claim 1, characterized in that: It also includes a leveler (L), which is located between the cooling furnace (E) and the shearing device (G).

6. The composite rolling system for strip material according to claim 1, characterized in that: The invention also comprises a welding machine (M) for welding the rolled strips, wherein the welding machine (M) is located between the rolling mill (C) and the annealing furnace (D).

7. The composite rolling system for strip material according to claim 1, characterized in that: It also includes an anti-wrinkle stabilizing roller (N), which is located between the heating furnace (B) and the rolling mill (C), and the strip passing through the anti-wrinkle stabilizing roller (N) is S-shaped.

8. The composite rolling system for strip material according to any one of claims 1 to 7, characterized in that: Also includes: A bracket assembly (7) for supporting the coupling when replacing the working roll assembly (2), the bracket assembly (7) being arranged on one side of the archway (1); A rotatable guide rail assembly (8) is movably arranged on the other side of the archway (1), and the rotatable guide rail assembly (8) has a first switching position in which it is in an open state when replacing a new working roll assembly (2), and a second switching position in which it is in a retracted state after the replacement of the new working roll is completed.

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