Special-shaped steel rolling forming process and thin-wall light steel multi-cavity plate production method and production line

Abstract

The invention provides a deformed steel rolling forming process which comprises the following steps: rolling a thin steel plate in sequence, so that the thin steel plate is gradually divided into a first side wing, a first connecting plate, a bottom plate, a second connecting plate and a second side wing which are connected in sequence in the width direction of the thin steel plate; the first connecting plate and part of the first side wing are rolled to form a first outer buckle, and the second connecting plate and part of the second side wing are rolled to form a second outer buckle; the side, away from the first connecting plate, of the first side wing is rolled to form a first inner buckle, and the side, away from the second connecting plate, of the second side wing is rolled to form a second inner buckle; and the first side wing and the second side wing are rolled towards the same side of the bottom plate and are perpendicular to the bottom plate to form the U-shaped steel. According to the special-shaped steel rolling forming process, the strip-shaped thin steel plates can be quickly and efficiently rolled into U-shaped steel which can be mutually buckled and connected. On the basis, the invention further provides a thin-wall light steel multi-cavity plate production method and a thin-wall light steel multi-cavity plate production line.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-cavity plate processing, and in particular to a special-shaped steel roll forming process, a thin-wall light steel multi-cavity plate production method and a production line. Background Art

[0002] At present, with the development of industrial production and the improvement of material level, thin-walled light steel multi-cavity panels have gradually replaced reinforced concrete and metal plates and have been widely used in many fields such as construction materials, machinery manufacturing, elevator shafts, and ship transportation.

[0003] However, the production process of thin-walled light steel multi-cavity panels has not been improved as it should be. The existing multi-cavity panel production process mostly uses welding, screwing and other technologies to connect and fix thin steel plates of different sizes. Not only are the process steps cumbersome, the production efficiency is low, the standardization of finished products is low, and there are various coordination problems, which makes it difficult to meet the growing needs of industrialization and large-scale production. Summary of the invention

[0004] The purpose of the present invention is to provide a special-shaped steel roll forming process, a thin-walled light steel multi-cavity plate production method and a thin-walled light steel multi-cavity plate production line to solve the above technical problems.

[0005] The present invention is achieved in that: A special-shaped steel roll forming process, driving a thin steel plate to move along its own length direction, arranging multiple sets of paired rollers in the moving direction, and the thin steel plate is rolled by the rollers in sequence during the movement process to finally form a U-shaped steel, comprising the following steps: step 1, using multiple sets of rollers to roll the thin steel plate in sequence, so that the thin steel plate is gradually divided into a first side wing, a first connecting plate, a bottom plate, a second connecting plate and a second side wing that are connected in sequence along its own width direction; step 2, using multiple sets of rollers to roll the first connecting plate and part of the first side wing to form a first outer buckle, and the second connecting plate and Part of the second side wing is rolled to form a second outer buckle; step 3, using multiple sets of rollers to roll the side of the first side wing away from the first connecting plate to form a first inner buckle, and rolling the side of the second side wing away from the second connecting plate to form a second inner buckle; step 4, using multiple sets of rollers to roll the first side wing and the second side wing toward the same side of the bottom plate and perpendicular to the bottom plate to form a U-shaped steel, so that the first inner buckle of the first U-shaped steel can be buckled with the first outer buckle of the second U-shaped steel, and the second inner buckle of the first U-shaped steel can be buckled with the second outer buckle of the second U-shaped steel.

[0006] Furthermore, in step 1, the first side wing and the second side wing are maintained at an initial horizontal position, and the bottom plate is gradually rolled downward by multiple sets of rollers, so that a first connecting plate is formed between the first side wing and the bottom plate, and a second connecting plate is formed between the second side wing and the bottom plate. The technical effect is that after multiple rolling, the prototypes of the bottom plate and the two side wings are initially formed.

[0007] Further, the bottom plate, the first side wing and the second side wing are continuously rolled until the first connecting plate and the second connecting plate are respectively perpendicular to the bottom plate. The technical effect is that the first connecting plate and the second connecting plate are flipped to a state perpendicular to the bottom plate, which facilitates the fixed connection of multiple U-shaped steels to form a thin-walled multi-cavity plate.

[0008] Furthermore, in step 2, the portion of the first wing close to the first connecting plate is rolled and overlapped with the first connecting plate to form a first external buckle, and the portion of the second wing close to the second connecting plate is rolled and overlapped with the second connecting plate to form a second external buckle. The technical effect is that the external buckle is formed by folding part of the wing and the connecting plate, which can avoid additional welding or screwing to form the buckle, and greatly improve the mechanical strength and production efficiency of the finished multi-cavity plate.

[0009] Furthermore, the first outer buckle and the second outer buckle are continuously rolled until the first outer buckle is flipped close to the first side wing and the second outer buckle is flipped close to the second side wing. The technical effect is that after the outer buckle is close to the side wing, it is easy to clamp and buckle with the inner buckle and fix it by riveting.

[0010] Furthermore, before rolling the first outer buckle and the second outer buckle, the portion of the first side wing close to the first outer buckle is first rolled downward to form a first accommodation step, and the portion of the second side wing close to the second outer buckle is rolled downward to form a second accommodation step. The technical effect is that the two accommodation steps can provide a connection space between the inner buckle and the outer buckle, and can also prevent the connection part of the finished multi-cavity plate from protruding outward.

[0011] Furthermore, in step 3, the first side wing and the second side wing are maintained at the initial horizontal position, and the outer side of the first side wing and the outer side of the second side wing are gradually turned downward by multiple sets of rollers, and turned to a specific angle. The technical effect is that if the turning angle of the outer side of the side wing is greater than 90 degrees, the angle between the bending position and the side wing itself is an acute angle, which is conducive to the buckling and riveting with the external buckle.

[0012] Furthermore, in step 4, the first outer buckle, the first side wing, the second outer buckle and the second side wing are rolled by a roller, so that the first side wing is pushed to turn over with the first outer buckle, and the second side wing is pushed to turn over with the second outer buckle. The technical effect is that the process can turn over the outer buckle and the side wing together to form an external shape that is easy to snap on.

[0013] A method for producing a thin-walled light steel multi-cavity plate comprises a thin steel plate feeding process, a U-shaped steel assembly process and the above-mentioned special-shaped steel roll-forming process; the thin steel plate feeding process is used to level a thin steel coil into a thin steel plate; the special-shaped steel roll-forming process is used to roll the leveled thin steel plate into a U-shaped steel; the U-shaped steel assembly process is used to assemble a plurality of U-shaped steels one by one to form a multi-cavity plate.

[0014] A thin-walled light steel multi-cavity plate production line comprises a thin steel plate feeding unit, a special-shaped steel forming unit and a U-shaped steel assembling unit which apply the above-mentioned thin-walled light steel multi-cavity plate production method; the thin steel plate feeding unit levels a thin steel coil into a thin steel plate through the thin steel plate feeding process and then conveys it to the special-shaped steel forming unit; the special-shaped steel forming unit rolls the thin steel plate into a U-shaped steel through the special-shaped steel rolling forming process and then conveys it to the U-shaped steel assembling unit; the U-shaped steel assembling unit assembles a plurality of U-shaped steels one by one through the U-shaped steel assembling process to form a multi-cavity plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: A special-shaped steel roll forming process can quickly and efficiently roll a strip-shaped thin steel plate into a U-shaped steel component with a connecting structure through a one-time rolling operation, thereby making it possible to quickly assemble multiple U-shaped steels into a multi-cavity plate.

[0016] A method for producing thin-walled light steel multi-cavity plates and a production line for thin-walled light steel multi-cavity plates complete the entire production of thin steel coils to multi-cavity plates on one production line through three process flows of thin steel plate feeding process, special-shaped steel roll forming process and U-shaped steel assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A diagram of the first roll forming process of the special-shaped steel roll forming process provided by the present invention; Figure 2 A second roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 3 The third roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 4 A fourth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 5The fifth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 6 This is a sixth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 7 The seventh roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Figure 8 The eighth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig. 9 The ninth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.10 The tenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.11 The eleventh roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.12 It is a twelfth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.13 The thirteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.14 It is a fourteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.15 The fifteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.16 It is the sixteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.17 The seventeenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.18 The eighteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.19 The nineteenth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig. 20 The twentieth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.21 The twenty-first roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig. 22 The twenty-second roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.23 The twenty-third roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.24 The twenty-fourth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.25 The twenty-fifth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.26 The twenty-sixth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig. 27 The twenty-seventh roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.28 The twenty-eighth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.29 The twenty-ninth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.30 The 30th roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.31 The thirty-first roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.32 The thirty-second roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.33 The thirty-third roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.34 The thirty-fourth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.35 The thirty-fifth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.36 The thirty-sixth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.37 The thirty-seventh roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.38 The thirty-eighth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.39 The thirty-ninth roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.40 It is the 40th roll forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.41 A forming diagram of the special-shaped steel after rolling in step 1 in the roll forming process provided by the present invention; Fig.42A forming diagram of the special-shaped steel after rolling in step 2 in the roll forming process provided by the present invention; Fig.43 A roll forming diagram of a first accommodating step and a second accommodating step in the roll forming process of special-shaped steel provided by the present invention; Fig.44 A forming diagram of the first inner buckle and the second inner buckle being initially rolled and bent in the special-shaped steel roll forming process provided by the present invention; Fig.45 A forming diagram of the first inner buckle and the second inner buckle in the special-shaped steel roll forming process provided by the present invention; Fig.46 The final forming diagram of the special-shaped steel roll forming process provided by the present invention; Fig.47 This is a schematic diagram of the overall structure of the thin-wall light steel multi-cavity panel production line provided by the present invention.

[0019] Icons: 100-thin steel plate; 110-first side wing; 210-first connecting plate; 300-bottom plate; 220-second connecting plate; 120-second side wing; 510-first outer buckle; 520-second outer buckle; 610-first inner buckle; 620-second inner buckle; 710-first accommodating step; 720-second accommodating step; 800-roller; 910-thin steel plate feeding unit; 920-special-shaped steel forming unit; 930-U-shaped steel assembly unit. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on some embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0021] The accompanying drawings include: Figure 1 to Figure 40 They are respectively roll forming diagrams of the special-shaped steel roll forming process for the thin steel plate 100 provided by the present invention (including 40 roll forming processes of the thin steel plate 100 using 40 sets of mixing wheels in sequence from front to back); Fig.41 A forming diagram of the special-shaped steel roll forming process for a thin steel plate 100 provided by the present invention after rolling in step 1; Fig.42 A forming diagram of the special-shaped steel roll forming process for a thin steel plate 100 provided by the present invention after rolling in step 2; Fig.43 A roll forming diagram of a first accommodating step 710 and a second accommodating step 720 in a special-shaped steel roll forming process for a thin steel plate 100 provided by the present invention; Fig.44A forming diagram of the first inner buckle 610 and the second inner buckle 620 being initially rolled and bent in the special-shaped steel roll forming process for the thin steel plate 100 provided by the present invention; Fig.45 A forming diagram of a first inner buckle 610 and a second inner buckle 620 in a special-shaped steel roll forming process for a thin steel plate 100 provided by the present invention; Fig.46 The final forming diagram of the special-shaped steel roll forming process for the thin steel plate 100 provided by the present invention; Fig.47 This is a schematic diagram of the overall structure of the thin-wall light steel multi-cavity panel production line provided by the present invention.

[0022] like Figure 1 to Figure 46 As shown, this embodiment provides a special-shaped steel roll forming process for a thin steel plate 100, driving the thin steel plate 100 to move along its own length direction, and arranging a plurality of pairs of rollers 800 in the moving direction. The thin steel plate 100 is rolled by the rollers 800 in sequence during the moving process to finally form a U-shaped steel, including the following steps: Step 1, using multiple groups of rollers 800 to roll the thin steel plate 100 in sequence, so that the thin steel plate 100 is gradually divided into a first side wing 110, a first connecting plate 210, a bottom plate 300, a second connecting plate 220 and a second side wing 120 connected in sequence along its width direction.

[0023] Step 2: Use multiple sets of rollers 800 to roll the first connecting plate 210 and a portion of the first side wing 110 to form a first outer buckle 510 , and roll the second connecting plate 220 and a portion of the second side wing 120 to form a second outer buckle 520 .

[0024] Step 3: Use multiple sets of rollers 800 to roll the side of the first wing 110 away from the first connecting plate 210 to form a first inner buckle 610 , and roll the side of the second wing 120 away from the second connecting plate 220 to form a second inner buckle 620 .

[0025] Step 4, using multiple sets of rollers 800 to roll the first side wing 110 and the second side wing 120 toward the same side of the bottom plate 300 and perpendicular to the bottom plate 300 to form a U-shaped steel, so that the first inner buckle 610 of the first U-shaped steel can be fastened with the first outer buckle 510 of the second U-shaped steel, and the second inner buckle 620 of the first U-shaped steel can be fastened with the second outer buckle 520 of the second U-shaped steel.

[0026] It should be noted that the roll forming of U-shaped steel is a one-time operation in which the thin steel plate 100 is rolled in sequence by multiple groups of relatively arranged rollers 800 during movement to form a U-shaped steel with a special structure; the bottom plate 300 and the two side wings can respectively form the internal support structure and the external frame structure of the multi-cavity plate; the inner clip and the outer clip are used to snap together and can be riveted and fixed to achieve the interconnection of multiple U-shaped steels.

[0027] Based on the above embodiments, Figure 1~Figure 5 As shown, further, in step 1, the first side wing 110 and the second side wing 120 are maintained at the initial horizontal position, and the bottom plate 300 is gradually rolled downward by multiple sets of rollers 800, so that a first connecting plate 210 is formed between the first side wing 110 and the bottom plate 300, and a second connecting plate 220 is formed between the second side wing 120 and the bottom plate 300. In the technical solution of this embodiment, after multiple rolling, the prototypes of the bottom plate 300 and the two side wings are initially formed.

[0028] Based on any of the above embodiments, Figure 5 As shown, further, the bottom plate 300, the first side wing 110 and the second side wing 120 are continuously rolled until the first connecting plate 210 and the second connecting plate 220 are respectively perpendicular to the bottom plate 300. In the technical solution of this embodiment, the first connecting plate 210 and the second connecting plate 220 are flipped to a state perpendicular to the bottom plate 300, which facilitates the fixed connection of multiple U-shaped steels to each other to form a thin-walled multi-cavity plate.

[0029] Based on any of the above embodiments, Figure 6~Figure 10 As shown, further, in step 2, the portion of the first wing 110 close to the first connecting plate 210 is roll-pressed and overlapped with the first connecting plate 210 to form a first external buckle 510, and the portion of the second wing 120 close to the second connecting plate 220 is roll-pressed and overlapped with the second connecting plate 220 to form a second external buckle 520. In the technical solution of this embodiment, part of the wing and the connecting plate are folded together to form an external buckle, which can avoid additional welding or screwing of the buckle, greatly improving the mechanical strength and production efficiency of the finished multi-cavity plate.

[0030] Based on any of the above embodiments, Figure 11~Figure 15 As shown, further, the first outer buckle 510 and the second outer buckle 520 are continuously rolled until the first outer buckle 510 is flipped close to the first side wing 110, and the second outer buckle 520 is flipped close to the second side wing 120. In the technical solution of this embodiment, after the outer buckle is close to the side wing, it is convenient to clamp and buckle with the inner buckle, and fix by riveting.

[0031] Based on any of the above embodiments, Fig.16 As shown, further, before rolling the first outer buckle 510 and the second outer buckle 520, the portion of the first side wing 110 close to the first outer buckle 510 is first rolled downward to form a first accommodating step 710, and the portion of the second side wing 120 close to the second outer buckle 520 is rolled downward to form a second accommodating step 720. In the technical solution of this embodiment, the two accommodating steps can provide a connection space between the inner buckle and the outer buckle, and can also prevent the connection part of the finished multi-cavity plate from protruding outward.

[0032] Based on any of the above embodiments, Figure 17 to Figure 24 As shown, further, in step 3, the first side wing 110 and the second side wing 120 are maintained at the initial horizontal position, and the outer side of the first side wing 110 and the outer side of the second side wing 120 are gradually turned downward and turned to a specific angle by multiple sets of rollers 800. In the technical solution of this embodiment, if the turning angle of the outer side of the side wing is greater than 90 degrees, the angle between its bending position and the side wing itself is an acute angle, which is conducive to the buckling and riveting with the external buckle.

[0033] Based on any of the above embodiments, Figure 25~Figure 40 As shown, further, in step 4, the first outer buckle 510, the first side wing 110, the second outer buckle 520 and the second side wing 120 are rolled by the roller 800 to push the first side wing 110 to flip along with the first outer buckle 510, and push the second side wing 120 to flip along with the second outer buckle 520. In the technical solution of this embodiment, the process can flip the outer buckle and the side wing together to form an external shape that is easy to snap on.

[0034] It should be emphasized that if Figure 1 to Figure 46 As shown, during step 1 to step 4, multiple groups of paired rollers 800 are arranged in a straight line direction, so that the strip thin steel plate 100 can be rolled into a U-shaped steel at one time after moving in the straight line direction, which greatly improves the production efficiency of U-shaped steel and multi-cavity plates.

[0035] It should be emphasized that before step 1, a length measuring module and a cutting module can also be set up to cut the strip thin steel plate 100 to be rolled into a specific length according to production needs, thereby improving the design and production flexibility of U-shaped steel and multi-cavity plates, and enabling U-shaped steel and multi-cavity plates to adapt to the production needs of various different sizes and types.

[0036] The present embodiment also provides a method for producing a thin-walled light steel multi-cavity plate, including a thin steel plate feeding process, a U-shaped steel assembly process and the above-mentioned special-shaped steel roll-forming process; wherein, the thin steel plate feeding process is used to level the thin steel coil into a thin steel plate 100; the special-shaped steel roll-forming process is used to roll the leveled thin steel plate 100 into a U-shaped steel; and the U-shaped steel assembly process is used to assemble multiple U-shaped steels one by one to form a multi-cavity plate.

[0037] Specifically, the thin steel plate feeding process can use conventional equipment such as a decoiler to level the thin steel coil into a thin steel plate 100 and then enter the special-shaped steel roll-forming process; the special-shaped steel roll-forming process can roll the thin steel plate 100 into a U-shaped steel suitable for making a multi-cavity plate in one go as in the above process; the U-shaped steel assembly process can use conventional manual or mechanical nailing, riveting or rolling methods to assemble multiple U-shaped steels one by one to form a multi-cavity plate.

[0038] Fig.47 The overall structural diagram of the thin-wall light steel multi-cavity plate production line provided by the present invention is as follows: Fig.47 As shown, the present embodiment also provides a thin-walled light steel multi-cavity plate production line, including a thin steel plate feeding unit 910, a special-shaped steel forming unit 920 and a U-shaped steel assembling unit 930 applying the above-mentioned thin-walled light steel multi-cavity plate production method; the thin steel plate feeding unit 910 levels the thin steel coil into a thin steel plate through a thin steel plate feeding process and then conveys it to the special-shaped steel forming unit 920, the special-shaped steel forming unit 920 rolls the thin steel plate into a U-shaped steel through a special-shaped steel rolling forming process and then conveys it to the U-shaped steel assembling unit 930, and the U-shaped steel assembling unit 930 assembles multiple U-shaped steels one by one through the U-shaped steel assembling process to form a multi-cavity plate.

[0039] Among them, the thin steel plate feeding unit 910 can use conventional equipment such as a decoiler, the special-shaped steel forming unit 920 adopts the above-mentioned special-shaped steel roll forming process to realize the transformation of thin steel coils into U-shaped steel through multiple paired rollers 800, and the U-shaped steel assembly unit 930 can use a manually operated stamping table, a machine connected and fixed by screws and nuts, a machine connected and fixed by rivets, or a device connected and fixed by rollers, etc.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any changes, modifications, substitutions and variations made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

[0041] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A special-shaped steel roll forming process, characterized in that: The thin steel plate (100) is driven to move along its length direction, a plurality of pairs of rollers (800) are arranged in the moving direction, and the thin steel plate (100) is rolled by the rollers (800) in sequence during the moving process to finally form a U-shaped steel, comprising the following steps: Step 1, using a plurality of sets of rollers (800) to sequentially roll the thin steel plate (100), so that the thin steel plate (100) is gradually divided into a first side wing (110), a first connecting plate (210), a bottom plate (300), a second connecting plate (220), and a second side wing (120) which are sequentially connected along its width direction; Step 2, using a plurality of rollers (800) to roll the first connecting plate (210) and a portion of the first side wing (110) to form a first external buckle (510), and to roll the second connecting plate (220) and a portion of the second side wing (120) to form a second external buckle (520); Step 3, using a plurality of rollers (800) to roll a side of the first side wing (110) away from the first connecting plate (210) to form a first inner buckle (610), and to roll a side of the second side wing (120) away from the second connecting plate (220) to form a second inner buckle (620); Step 4, using multiple sets of rollers (800) to roll the first side wing (110) and the second side wing (120) toward the same side of the bottom plate (300) and perpendicular to the bottom plate (300) to form a U-shaped steel, so that the first inner buckle (610) of the first U-shaped steel can be buckled with the first outer buckle (510) of the second U-shaped steel, and the second inner buckle (620) of the first U-shaped steel can be buckled with the second outer buckle (520) of the second U-shaped steel.

2. The special-shaped steel roll forming process according to claim 1, characterized in that: In step 1, the first side wing (110) and the second side wing (120) are maintained at an initial horizontal position, and the bottom plate (300) is gradually rolled downward by a plurality of rollers (800) to form a first connecting plate (210) between the first side wing (110) and the bottom plate (300), and a second connecting plate (220) between the second side wing (120) and the bottom plate (300).

3. The special-shaped steel roll forming process according to claim 2, characterized in that: The bottom plate (300), the first side wing (110), and the second side wing (120) are continuously rolled until the first connecting plate (210) and the second connecting plate (220) are respectively perpendicular to the bottom plate (300).

4. The process for roll forming of special-shaped steel according to claim 2, characterized in that: In step 2, a portion of the first side wing (110) close to the first connecting plate (210) is roll-pressed and overlapped with the first connecting plate (210) to form a first external buckle (510), and a portion of the second side wing (120) close to the second connecting plate (220) is roll-pressed and overlapped with the second connecting plate (220) to form a second external buckle (520).

5. The process for roll forming of special-shaped steel according to claim 4, characterized in that: The first outer buckle (510) and the second outer buckle (520) are continuously rolled until the first outer buckle (510) is flipped over and close to the first side wing (110), and the second outer buckle (520) is flipped over and close to the second side wing (120).

6. The process for roll forming of special-shaped steel according to claim 5, characterized in that: Before rolling the first outer buckle (510) and the second outer buckle (520), the portion of the first side wing (110) close to the first outer buckle (510) is rolled downward to form a first accommodation step (710), and the portion of the second side wing (120) close to the second outer buckle (520) is rolled downward to form a second accommodation step (720).

7. The process for roll forming of special-shaped steel according to claim 2, characterized in that: In step 3, the first side wing (110) and the second side wing (120) are maintained at an initial horizontal position, and the outer sides of the first side wing (110) and the second side wing (120) are gradually flipped downwards and flipped to a specific angle by using multiple sets of rollers (800).

8. The process for roll forming of special-shaped steel according to claim 2, characterized in that: In step 4, the first outer buckle (510), the first side wing (110), the second outer buckle (520) and the second side wing (120) are rolled by a roller (800) to push the first side wing (110) to flip along with the first outer buckle (510), and push the second side wing (120) to flip along with the second outer buckle (520).

9. A method for producing a thin-walled light steel multi-cavity plate, characterized in that: It includes a thin steel plate feeding process, a U-shaped steel assembling process and a special-shaped steel roll-forming process as described in any one of claims 1 to 8; the thin steel plate feeding process is used to level the thin steel coil into a thin steel plate; the special-shaped steel roll-forming process is used to roll the leveled thin steel plate into a U-shaped steel; the U-shaped steel assembling process is used to assemble multiple U-shaped steels one by one to form a multi-cavity plate.

10. A thin-wall light steel multi-cavity panel production line, characterized in that: It comprises a thin steel plate feeding unit, a special-shaped steel forming unit and a U-shaped steel assembling unit which apply the method for producing thin-walled light steel multi-cavity plates as described in claim 9; the thin steel plate feeding unit levels the thin steel coil into a thin steel plate through the thin steel plate feeding process and then conveys it to the special-shaped steel forming unit, the special-shaped steel forming unit rolls the thin steel plate into a U-shaped steel through the special-shaped steel rolling forming process and then conveys it to the U-shaped steel assembling unit, and the U-shaped steel assembling unit assembles a plurality of U-shaped steels one by one through the U-shaped steel assembling process to form a multi-cavity plate.

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