A multi-layer roll forming device and its forming method

Abstract

The present invention relates to a multi-layer roll forming device and a forming method thereof. Among them, the multi-layer roll forming device includes a feeding mechanism, which includes at least two feeders; a multi-layer roll pressing mechanism, which includes a plurality of multi-layer roll pressing devices arranged at intervals along the conveying direction of the material. The multi-layer roll pressing device includes two parallel and spaced-apart frames, and there are at least two roll pressing channels between the two frames. The number of roll pressing channels is the same as the number of feeders; a combined welding roll pressing mechanism, which includes a first welding device and a plurality of first roll pressing devices arranged at intervals along the conveying direction of the material. A forming channel is provided on the first roll pressing device; a closed welding roll pressing mechanism, which includes a second welding device and a plurality of second roll pressing devices arranged at intervals along the conveying direction of the material. A shaping channel is provided on the second roll pressing device. The present invention can simultaneously roll form at least two materials, and can select materials with different thicknesses for processing according to the load-bearing requirements, which is beneficial to saving raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of profiled steel rolling devices, and particularly relates to a multi-layer rolling forming device and a forming method thereof. Background Art

[0002] With the increasing demand for lightweight automotive design, during the design process of new energy vehicles, the lightweight requirements for the battery module installation package are also correspondingly increased. It is necessary to reduce the weight of the installation package under the condition of meeting the strength requirements to reduce the power consumption of the battery.

[0003] During the production of the battery module installation package, profiled steel for rolling needs to be applied. However, the existing method of improving the strength of profiled steel by increasing the material thickness can no longer meet the lightweight requirements. In order to meet the lightweight requirements of automobiles, the industry has begun to develop various complex profiled steel sections for rolling. This type of section can ensure the strength of the profiled steel for rolling remains unchanged or is enhanced while reducing the material thickness by increasing the internal reinforcing ribs of the profiled steel for rolling. The existing manufacturing process for complex profiled steel sections for rolling is complex and requires many forming passes. Therefore, the existing production equipment for complex profiled steel sections for rolling has a large floor area, high energy consumption, large equipment investment, a long debugging cycle, and it is difficult to control the product quality. Also, since the existing rolling forming is processed from a single raw material through rolling, the wall thickness of the profiled steel for rolling is equal, resulting in waste of some materials. It is an urgent problem for the entire industry to reduce the weight of the profiled steel for rolling while ensuring the strength improvement, reduce the production cost, and improve the product quality. Summary of the Invention

[0004] Aiming at the defects in the prior art, one of the technical problems to be solved by the present invention is to provide a multi-layer rolling forming device to realize the simultaneous rolling forming of multiple materials; the second technical problem to be solved by the present invention is to provide a forming method for the multi-layer rolling forming device to improve the forming process and save raw materials.

[0005] To solve one of the above technical problems, the present invention provides a multi-layer roll forming device, including a feeding mechanism, which includes at least two feeders, and a roll of material is clamped on each feeder; a multi-layer roll pressing mechanism, which includes a plurality of multi-layer roll pressing devices arranged at intervals along the conveying direction of the material, and the multi-layer roll pressing device includes two parallel and spaced-apart frames, and there are at least two roll pressing channels between the two frames, and the plurality of roll pressing channels are arranged at intervals in the vertical direction, and the number of the roll pressing channels is the same as the number of the feeders; each roll pressing channel is defined by a pair of roll pressing components, and each pair of roll pressing components includes a driving roll and a driven roll arranged at intervals in the vertical direction; a combined welding and roll pressing mechanism, which includes a first welding device and a plurality of first roll pressing devices arranged at intervals along the conveying direction of the material, and a forming channel is provided on the first roll pressing device, and a plurality of the materials are combined and welded under the action of the first welding device to form a to-be-closed part and pass through the forming channel; a closed welding and roll pressing mechanism, which includes a second welding device and a plurality of second roll pressing devices arranged at intervals along the conveying direction of the material, and a shaping channel is provided on the second roll pressing device, and the to-be-closed part is closed and welded under the action of the second welding device and then passes through the shaping channel.

[0006] Preferably, both ends of the driving roll are rotatably connected to the first mounting blocks respectively, and both ends of the driven roll are rotatably connected to the second mounting blocks respectively; the first mounting blocks are fixedly connected to the frames, and the second mounting blocks are slidably connected to the frames in the vertical direction, and an adjusting mechanism is arranged between the frames and the second mounting blocks, and the adjusting mechanism is used to adjust the sliding position of the second mounting blocks relative to the frames.

[0007] Preferably, the adjusting mechanism includes a first adjusting device, which is used to adjust the sliding position of the uppermost second mounting block; the first adjusting device includes a first lead screw and a first nut connected by threads, the first nut is rotatably connected to the top of the frame, and the bottom of the first lead screw is fixedly connected to the corresponding second mounting block.

[0008] Preferably, the adjusting mechanism includes a second adjusting device, which includes a first adjusting block, a second adjusting block and a second lead screw, through holes for the second lead screw to pass through are provided on both the first adjusting block and the second adjusting block, two second nuts and two third nuts are threadedly connected to the second lead screw, the two second nuts are respectively located on the upper and lower sides of the first adjusting block, and the two third nuts are respectively located on the upper and lower sides of the second adjusting block; the first mounting block and the second mounting block corresponding to the same pair of roll pressing components are respectively fixedly connected to the first adjusting block and the second adjusting block.

[0009] Preferably, the second adjusting device is used to adjust the sliding position of the second mounting block corresponding to the lower pressing roller assembly.

[0010] Preferably, a sprocket is mounted at one end of the driving roller extending out of the first mounting block, and the sprockets corresponding to the respective driving rollers are connected by a chain drive.

[0011] To solve the second of the above technical problems, the present invention provides a forming method for a multi-layer roll forming device, including the following steps: Step 1: Analyze the cross-sectional shape of the product, and split it into at least two sub-products. The sub-sections of the multiple sub-products jointly form the cross-section of the product, and merging weld points and closed weld points are designed on the sub-products; Step 2: Clamp the materials on the feeder, and the number of the materials is the same as the number of the sub-products; Step 3: Multiple materials pass through the rolling channels of the multi-layer rolling mechanism synchronously one by one, and the materials passing through the rolling channels are roll-formed into parts to be merged; Step 4: Multiple parts to be merged pass through the forming channels of the merging and welding rolling mechanism simultaneously. At the same time, the first welding device merges and welds the multiple parts to be merged at the merging weld points to form a part to be closed; Step 5: The closed welding rolling mechanism closes and welds the part to be closed at the closed weld point to form a closed part, and drives the closed part through the shaping channel to form the product.

[0012] Preferably, the merging weld point is located on the inner circumference of the product, and the closed weld point is located on the outer side of the product.

[0013] Preferably, the thicknesses of multiple materials are different.

[0014] The present invention has the following beneficial effects:

[0015] (1) The multi-layer roll forming device of the present invention has multiple feeders, and each feeder clamps a roll of material. During forming, each material enters a rolling channel, and all materials pass through the multi-layer rolling mechanism synchronously to complete preliminary roll forming; Subsequently, multiple preliminarily formed materials are merged into the forming channels of the merging and welding rolling mechanism for further roll forming. During this process, the first welding device merges and welds the mutually independent materials to form a part to be closed; Subsequently, the part to be closed after merging and welding enters the shaping channel of the closed welding rolling mechanism for final shaping. During this process, the second welding device closes and welds it to make its connection firm and facilitate the final product forming.

[0016] (2) The forming method of the multi-layer roll forming equipment of the present invention adopts the method of splitting the cross-section, divides the cross-section of the product as required, and forms the final product by using multiple materials, multi-layer roll pressing, combined welding, and closed welding. The roll pressing process is no longer carried out in a single process sequentially, but adopts a multi-layer synchronous forming method, which greatly reduces the forming passes and development costs. Moreover, during the production process, according to the load-bearing requirements of the cross-section, multiple materials with different thicknesses and different materials can be selected for composite roll forming, which can effectively prevent waste of raw materials. In addition, for products with complex cross-sections, the original single-process sequential forming method has many forming passes and many roll pressing dead corners, and there are easily dimensional deviations. However, the forming method of splitting the cross-section and multi-layer roll pressing of the present invention simplifies the complex process, reduces the roll pressing dead corners, and the dimensional difference of the formed product is smaller and the accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 Structural schematic diagram of the multi-layer roll forming equipment according to an embodiment of the present invention;

[0019] Figure 2 Structural schematic diagram of the combined welding roll pressing mechanism according to an embodiment of the present invention;

[0020] Figure 3 Structural schematic diagram of the closed welding roll pressing mechanism according to an embodiment of the present invention;

[0021] Figure 4 Structural schematic diagram of the multi-layer roll pressing mechanism according to an embodiment of the present invention;

[0022] Figure 5 Top view of the multi-layer roll pressing mechanism according to an embodiment of the present invention;

[0023] Figure 6 Structural schematic diagram of the connection between the multi-layer roll pressing device and the driving mechanism according to an embodiment of the present invention;

[0024] Figure 7 For Figure 6 Partial enlarged view A;

[0025] Figure 8 Structural schematic diagram of the connection between the clutch device and the reducer according to an embodiment of the present invention;

[0026] Figure 9 Partial structural schematic diagram of the first driving device according to an embodiment of the present invention;

[0027] Figure 10 is a schematic structural diagram of an adjustment mechanism according to an embodiment of the present invention;

[0028] Figure 11 for Figure 10 A partial enlarged view of B;

[0029] Figure 12 A schematic diagram of the cross-sectional structure of a product according to an embodiment of the present invention;

[0030] Figure 13 Schematic diagram of the material forming process according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1-feeder; 2-multi-layer rolling mechanism; 21-multi-layer rolling device; 211-frame; 212-roller assembly; 2121-active roller; 2122-driven roller; 213-first mounting block; 214-second mounting block; 215-first adjusting device; 2151-first screw rod; 2152-first nut; 216-second adjusting device; 2161-first adjusting block; 2162-second adjusting block; 2163-second screw rod; 2164-second nut; 2165-third nut; 3-merged welding rolling mechanism; 31-first Welding device; 32-first rolling device; 4-closed welding rolling mechanism; 41-second welding device; 42-second rolling device; 5-product; 51-sub-product; 511-merged welding point; 512-closed welding point; 6-base; 7-driving mechanism; 71-motor; 72-reducer; 8-clutch device; 81-first half clutch; 82-second half clutch; 821-annular groove; 83-rotating shaft; 84-support; 85-sliding mechanism; 851-first connecting rod; 852-roller; 86-telescopic cylinder; 87-second connecting rod. DETAILED DESCRIPTION

[0033] 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.

[0034] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 ,Figure 9 , Figure 10 and Figure 11 As shown in Figure 11 , Figure 10 and Figure 9 , this embodiment provides a multi-layer roll forming device, which includes two feeders 1, and a roll of material is clamped on each feeder 1. The material is sent out from the feeder 1 and sequentially passes through a multi-layer roll pressing mechanism 2, a combined welding roll pressing mechanism 3 and a closed welding roll pressing mechanism 4 to form a final formed product.

[0036] In this embodiment, the above-mentioned multi-layer roll pressing mechanism 2 includes two multi-layer roll pressing devices 21 arranged at intervals along the conveying direction of the material. The multi-layer roll pressing device 21 includes two frames 211 arranged in parallel at intervals, and there are two roll pressing channels between the two frames 211. The two roll pressing channels are arranged at intervals in the vertical direction. Each roll pressing channel is defined by a pair of roll pressing assemblies 212, and each pair of roll pressing assemblies 212 includes a driving roll 2121 and a driven roll 2122 arranged at intervals in the vertical direction.

[0037] The above-mentioned combined welding roll pressing mechanism 3 includes a first welding device 31 and a plurality of first roll pressing devices 32 arranged at intervals along the conveying direction of the material. The first roll pressing device 32 has a forming channel, and two materials are combined and welded under the action of the first welding device 31 to form a to-be-closed part and pass through the forming channel.

[0038] The above-mentioned closed welding roll pressing mechanism 4 includes a second welding device 41 and a plurality of second roll pressing devices 42 arranged at intervals along the conveying direction of the material. The second roll pressing device 42 has a shaping channel, and the above-mentioned to-be-closed part is closed and welded under the action of the second welding device 41 and then passes through the shaping channel.

[0039] The forming method of the multi-layer roll forming device in this embodiment includes the following steps:

[0040] Step 1: Analyze the cross-sectional shape of the product 5, split it into two sub-products 51, the sub-sections of multiple sub-products 51 jointly form the cross-section of the product, and merging weld points 511 and closed weld points 512 are designed on the sub-products 51;

[0041] Step 2: Clamp the materials on the feeder 1, and the number of materials is the same as the number of sub-products 51;

[0042] Step 3: Two materials synchronously pass through the roll pressing channels of the multi-layer roll pressing mechanism 2 one by one, and the materials passing through the roll pressing channels are roll formed into two to-be-merged parts;

[0043] Step 4: The two to-be-merged parts simultaneously pass through the forming channel of the combined welding roll pressing mechanism 3. At the same time, the first welding device 31 merges and welds the two to-be-merged parts at the merging weld point 511 to form a to-be-closed part;

[0044] Step 5: The closed welding and rolling mechanism 4 performs closed welding on the workpiece to be closed at the closed welding point 512 to form a closed workpiece, and drives the closed workpiece through the shaping channel to form the product 5.

[0045] The above-mentioned merged welding point 511 is located on the inner circumference of the product 5, and the closed welding point 512 is located on the outer side of the product 5.

[0046] Reference Figure 12 and Figure 13 , which shows the cross-sectional shape of the product 5 in this embodiment and its forming process. The product 5 in this embodiment can be split into two sub-products 51. The load-bearing requirements of the two sub-products 51 are different, and their thicknesses can be designed differently to save materials. One of the two sub-products 51 in this embodiment is in a "Ji" shape, and the other is in a "Tu" shape. To facilitate the welding of the two sub-products 51, the merged welding point 511 is located between the bottom of the "Ji"-shaped sub-product and the bottom wall of the "Tu"-shaped sub-product, and the closed welding point 512 is located between the outer side of the "Ji"-shaped sub-product and the inner side of the top of the "Tu"-shaped sub-product.

[0047] Specifically, the above-mentioned workpieces to be merged are formed after the material is preliminarily rolled by the multi-layer rolling mechanism, and the two workpieces to be merged are independent of each other. The workpiece to be closed is formed by welding two independent workpieces to be merged at the merged welding point 511 and then further rolled by the first rolling device, and finally completed the closed welding at the closed welding point 512 through the welding and rolling mechanism 4, and formed the final product 5 through the rolling and shaping of the second rolling device 42.

[0048] The multi-layer rolling forming equipment in this embodiment adopts the method of splitting the cross-section, divides the cross-section of the product 5 as needed, and forms the final product by using two materials, multi-layer rolling, merged welding, and closed welding. The rolling process is no longer a single process in sequence, but a multi-layer synchronous forming, which greatly reduces the forming passes and development costs. Moreover, during the production process, according to the load-bearing requirements of the cross-section, multiple materials with different thicknesses and different materials can be selected for composite rolling forming, that is, the thicknesses of multiple materials can be different, effectively preventing waste of raw materials. In addition, the original single-process sequential forming method has many forming passes and many rolling dead corners for products with complex cross-sections, and it is easy to have dimensional deviations. However, the forming method of splitting the cross-section and multi-layer rolling in this embodiment simplifies the complexity, reduces the rolling dead corners, and the dimensional difference of the product forming is smaller and the accuracy is higher.

[0049] The cross-section of the product 5 in this embodiment is split into two parts, so the multi-layer rolling device 21 is double-layered and has two roller assemblies 212. In practice, the cross-sectional shape of the product 5 is not unique. According to the cross-sectional shape of the product 5, it can also be split into three or more sub-products. At this time, the number of roller assemblies 212 of the corresponding multi-layer rolling device 21 should also be the same as the number of sub-products, and the number of the corresponding feeder 1 and the material also needs to be adjusted adaptively.

[0050] Further, referring to Figures 4 - 11 , in the above multi-layer rolling device 21, both ends of the driving roller 2121 are rotatably connected to the first mounting block 213, and both ends of the driven roller 2122 are rotatably connected to the second mounting block 214. The first mounting block 213 is fixedly connected to the frame 211, and the second mounting block 214 is slidably connected to the frame 211 in the vertical direction. And an adjusting mechanism is provided between the frame 211 and the second mounting block 214. This adjusting mechanism is used to adjust the sliding position of the second mounting block 214 relative to the frame 211, and further adjust the distance between the driving roller 2121 and the driven roller 2122 of the same roller assembly 212, that is, adjust the width of the rolling channel, so as to adjust the forming shape and size of the material passing through this rolling channel.

[0051] The above adjusting mechanism includes a first adjusting device 215 and a second adjusting device 216. Among them, the first adjusting device 215 is used to adjust the sliding position of the second mounting block 214 located at the top, and the second adjusting device 216 is used to adjust the sliding position of the remaining second mounting blocks 214 located below.

[0052] Specifically, the first adjusting device 215 includes a first lead screw 2151 and a first nut 2152 that are threadedly connected. The first nut 2152 is rotatably connected to the top of the frame 211, and the bottom of the first lead screw 2151 is fixedly connected to the corresponding second mounting block 214. When needed, rotating the first nut 2152 can drive the first lead screw 2151 to move up and down, and further drive the second mounting block 214 to move up and down.

[0053] Specifically, the second adjusting device 216 includes a first adjusting block 2161, a second adjusting block 2162 and a second screw rod 2163. The first adjusting block 2161 and the second adjusting block 2162 are both provided with through holes for the second screw rod 2163 to pass through. Two second nuts 2164 and two third nuts 2165 are threadedly connected to the second screw rod 2163. The two second nuts 2164 are respectively located on the upper and lower sides of the first adjusting block 2161, and the two third nuts 2165 are respectively located on the upper and lower sides of the second adjusting block 2162. The first mounting block 213 and the second mounting block 214 corresponding to the same pressure roller assembly 212 are respectively screwed to the first adjusting block 2161 and the second adjusting block 2162. When necessary, the third nut 2165 can be loosened to adjust the sliding position of the corresponding second mounting block 214. After the adjustment is in place, the third nut 2165 can be tightened to keep the corresponding sliding position of the second mounting block 214.

[0054] In this embodiment, a sprocket is installed at one end of the active roller 2121 extending out of the first mounting block 213. In the same multi-layer rolling device 21, the sprockets corresponding to each active roller 2121 are connected through a chain transmission, so that the active rollers 2121 of the same multi-layer rolling device 21 can rotate synchronously to achieve rolling and conveying of materials.

[0055] It should be noted that the first roller pressing device 32 and the second roller pressing device 42 of this embodiment are conventional single-layer roller pressing devices, and their structures are not described in detail herein. In this embodiment, the multi-layer roller pressing mechanism 2, the combined welding roller pressing mechanism 3 and the closed welding roller pressing mechanism 4 are sequentially installed on the base 6 along the conveying direction of the material.

[0056] The base 6 is also provided with a driving mechanism 7, and one of the active rollers 2121 on the same multi-layer rolling device 21 is in transmission connection with the driving mechanism 7. In this embodiment, the active roller 2121 located at the bottom is in transmission connection with the driving mechanism 7.

[0057] Specifically, the driving mechanism 7 includes a motor 71 and a plurality of reducers 72 drivingly connected to the output shaft of the motor 71, and the output shaft of the reducer 72 is drivingly connected to the corresponding active roller 2121. In this embodiment, the output shaft of the motor 71 is connected to the commutator, and the two output shafts of the commutator are respectively connected to the input shafts of the reducers 72 located on both sides thereof through a double-row roller chain, and the input shafts of the reducers 72 located on the same side of the motor 71 are sequentially connected in series through a double-row roller chain, and the output shaft of each reducer 72 is drivingly connected to the corresponding active roller 2121. When in use, the active roller 2121 of the multi-layer rolling device 21 facing the motor 71 cannot be directly connected to the driving mechanism 7, so the active roller 2121 of the multi-layer rolling device 21 has no power input, and can be passively rotated under the friction of the material to achieve rolling of the material.

[0058] The multi-layer rolling devices 21 of this embodiment are mounted on the bottom plate in groups of four to form a rolling unit, and a lifting ring is provided on the bottom plate to facilitate the overall lifting of the rolling unit. Each rolling unit also includes a clutch device 8 mounted on the base 6, and the clutch device 8 includes a first half clutch 81, a second half clutch 82 and a first driving device. The first half clutch 81 is connected to the corresponding active roller 2121 in a non-rotating manner, and the second half clutch 82 is connected to the output shaft of the corresponding reducer 72 in a non-rotating and sliding manner. The second half clutch 82 can slide relative to the output shaft of the reducer 72 under the action of the first driving device to engage or disengage with the first half clutch 81. When the first half clutch 81 is engaged with the second half clutch 82, the torque of the output shaft of the reducer 72 can be transmitted to the corresponding active roller 2121 to drive all the active rollers 2121 of the corresponding multi-layer rolling device 21 to rotate synchronously. When the first half clutch 81 and the second half clutch 82 are separated, the torque cannot be transmitted, and the rolling unit can be disassembled and assembled as a whole.

[0059] Specifically, the second half clutch 82 is key-linked with the output shaft of the corresponding reducer 72, and a keyway is provided on the output shaft of the reducer 72 along its axial direction, and the keyway passes through the free end of the output shaft of the reducer 72, so that the key on the second half clutch 82 can slide in the keyway, thereby realizing the circumferential rotation-stopping and axial sliding connection between the second half clutch 82 and the output shaft of the reducer 72. In addition, an annular groove 821 is provided on the outer periphery of the second half clutch 82, and the first driving device acts on the annular groove 821 to drive the second half clutch 82 to slide relative to the output shaft of the reducer 72.

[0060] The first driving device includes a rotating shaft 83, and the two ends of the rotating shaft 83 are respectively connected to two supports 84 for rotation, and the supports 84 are fixedly connected to the base 6. The first driving device also includes a second driving device for driving the rotating shaft 83 to rotate. A group of toggle mechanisms 85 are arranged at the position of the rotating shaft 83 corresponding to the second half clutch 82, and the toggle mechanism 85 includes two first connecting rods 851, and the two first connecting rods 851 are respectively located on both sides of the second half clutch 82; one end of the first connecting rod 851 is connected to the rotating shaft 83 for rotation, and the other end is connected to the roller 852 for rotation, and the axis of the roller 852 is parallel to the axis of the rotating shaft 83; the two rollers 852 of the same toggle mechanism 85 are both inserted into the annular groove 821 of the corresponding second half clutch 82.

[0061] In this embodiment, the second driving device can drive the rotating shaft 83 to rotate. During the rotation of the rotating shaft 83, the first connecting rod 851 is driven to rotate synchronously. When the first connecting rod 851 rotates, the roller 852 thereon applies pressure to the corresponding side wall of the annular groove 821, so that the second half clutch 82 moves away from or close to the first half clutch 81 to achieve separation or engagement with the first half clutch 81.

[0062] Specifically, the above-mentioned second driving device includes a telescopic cylinder 86 and a second connecting rod 87. The telescopic cylinder 86 is a cylinder, the cylinder barrel end of which is hinged to the base 6, one end of the second connecting rod 87 is non-rotatably connected to the rotating shaft 83, and the other end is hinged to the rod end of the telescopic cylinder 86. Then, when the rod end of the telescopic cylinder 86 extends or retracts, it can drive the second connecting rod 87 to rotate clockwise or counterclockwise around the axis of the rotating shaft 83, and further drive the rotating shaft 83 to rotate synchronously.

[0063] In this embodiment, both the first connecting rod 851 and the second connecting rod 87 are key-connected to the rotating shaft 83 to achieve non-rotating connection between the two and the rotating shaft 83.

[0064] In the description of the present invention, a large number of specific details are set forth. However, it is understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, systems, and technologies have not been shown in detail so as not to obscure the understanding of this specification.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, systems, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, systems, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and 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 covered by the scope of the claims and the specification of the present invention.

Claims

1. A multi-layer roll forming device, characterized in that: include: The feeding mechanism comprises at least two feeders, each of which is clamped with a roll of material; A multi-layer rolling mechanism, comprising a plurality of multi-layer rolling devices arranged at intervals along the conveying direction of the material, the multi-layer rolling device comprising two parallel and spaced frames, at least two rolling channels between the two frames, the plurality of rolling channels arranged at intervals in the vertical direction, and the number of the rolling channels is consistent with the number of the feeders; each of the rolling channels is defined by a pair of roller assemblies, each pair of the roller assemblies comprising a driving roller and a driven roller arranged at intervals in the vertical direction; The merging welding and rolling mechanism comprises a first welding device and a plurality of first rolling devices arranged at intervals along the material conveying direction, the first rolling device is provided with a forming channel, and a plurality of the materials are merging and welding under the action of the first welding device to form a piece to be sealed and pass through the forming channel; The closed welding rolling mechanism comprises a second welding device and a plurality of second rolling devices arranged at intervals along the material conveying direction. The second rolling device is provided with a shaping channel, and the closed part passes through the shaping channel after closed welding under the action of the second welding device.

2. The multi-layer roll forming equipment according to claim 1, characterized in that: The two ends of the active roller are rotatably connected to the first mounting block respectively, and the two ends of the driven roller are rotatably connected to the second mounting block respectively; the first mounting block is fixedly connected to the frame, the second mounting block is slidably connected to the frame in the vertical direction, and an adjustment mechanism is provided between the frame and the second mounting block, and the adjustment mechanism is used to adjust the sliding position of the second mounting block relative to the frame.

3. The multi-layer roll forming device according to claim 2, characterized in that: The adjustment mechanism comprises a first adjustment device, the first adjustment device being used to adjust the sliding position of the second mounting block located at the uppermost position; The first adjusting device includes a first screw rod and a first nut which are threadedly connected. The first nut is rotatably connected to the top of the frame, and the bottom of the first screw rod is fixedly connected to the corresponding second mounting block.

4. The multi-layer roll forming equipment according to claim 2, characterized in that: The adjusting mechanism comprises a second adjusting device, which comprises a first adjusting block, a second adjusting block and a second screw rod, wherein the first adjusting block and the second adjusting block are both provided with a through hole for the second screw rod to pass through, and the second screw rod is threadedly connected with two second nuts and two third nuts, wherein the two second nuts are respectively located at the upper and lower sides of the first adjusting block, and the two third nuts are respectively located at the upper and lower sides of the second adjusting block; The first mounting block and the second mounting block corresponding to the same pressing roller assembly are fixedly connected to the first adjusting block and the second adjusting block respectively.

5. The multi-layer roll forming device according to claim 4, characterized in that: The second adjusting device is used to adjust the sliding position of the second mounting block corresponding to the pressure roller assembly located below.

6. The multi-layer roll forming device according to claim 2, characterized in that: A sprocket is installed on one end of the active roller extending out of the first mounting block, and the sprockets corresponding to the active rollers are connected through chain transmission.

7. The forming method of the multi-layer roll forming equipment according to claim 1, characterized in that: Step 1: Analyze the cross-sectional shape of the product and split it into at least two sub-products, wherein the sub-sections of the multiple sub-products together constitute the cross-sectional shape of the product, and design merged solder joints and closed solder joints on the sub-products; Step 2: Clamp the material on the feeder, and the quantity of the material is consistent with the quantity of the sub-products; Step 3: The plurality of materials are synchronously passed through the rolling channel of the multi-layer rolling mechanism in a one-to-one correspondence, and the materials passing through the rolling channel are rolled and formed into pieces to be combined; Step 4: the plurality of pieces to be combined pass through the forming channel of the combined welding roller pressing mechanism at the same time, and at the same time, the first welding device combines and welds the plurality of pieces to be combined at the combined welding points to form a piece to be closed; Step 5: The closed welding rolling mechanism closes and welds the closed part at the closed welding point to form a closed part, and drives the closed part through the shaping channel to form the product.

8. The forming method of the multi-layer roll forming equipment according to claim 7, characterized in that: The combined welds are located at the inner periphery of the product, and the closed welds are located at the outer periphery of the product.

9. The forming method of the multi-layer roll forming equipment according to claim 7, characterized in that: The plurality of materials have different thicknesses.

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