Wave-shaped guardrail steel plate press forming machine tool

Abstract

A wave guardrail steel plate press forming machine tool, including bending roller group and conveying roller group, bending roller group includes arching die and transmission mechanism, the machine frame is fixed with limit support plate, limit support plate is arranged in the inside of transmission mechanism, for supporting transmission mechanism, so that multiple arching dies in bending arching area region can be contacted with steel plate along fixed reference line when moving, the device adopts multiple arching dies of circulating movement cooperation inside fixed limit support plate, so that all arching dies move along the same fixed reference line in bending arching area, avoid the cumulative positioning error generated by traditional multiple independent dies respectively centering and adjusting, by the arching die in the same group according to contact order gradually increasing, single large deformation is decomposed into multiple small deformation progressive arching, arching height is evenly distributed in each cycle, can effectively reduce the deformation of single forming, protect the galvanized layer from being damaged.

Description

Technical Field

[0001] This invention belongs to the field of guardrail processing technology, specifically referring to a corrugated guardrail steel plate pressing and forming machine tool. Background Technology

[0002] Corrugated beam guardrails are semi-rigid road safety facilities composed of steel components such as corrugated beams, posts, anti-collision blocks, and end caps. Their core structure consists of cold-bent double- or triple-wave steel plates, securely connected to the posts and anti-collision blocks. In the event of a vehicle collision, the corrugated plates effectively absorb impact energy through elastic and plastic deformation, while their continuous wave shape guides out-of-control vehicles to gradually decelerate and change direction, preventing them from running off the road or crossing into oncoming lanes. These guardrails combine rigidity and flexibility, offering reliable protection and ease of maintenance and replacement. They are widely applicable to dangerous sections, curves, bridge sides, and median strips on highways, first-class roads, second-class roads, and rural roads, making them the most widely used passive collision avoidance system.

[0003] During the bending process of corrugated guardrails, if the elongation of the sheet metal is insufficient or the bending angle is too large, surface cracks or even internal hidden cracks are prone to occur at the bending point, severely weakening the guardrail's load-bearing capacity and fatigue life. Secondly, due to the springback characteristics of steel, the bending angle after one-time forming is prone to springback deviation, affecting the accuracy of the corrugated profile. Furthermore, the bending point is often accompanied by surface defects such as folds, indentations, and burrs on the sheared section. These defects not only damage the adhesion of the galvanized layer but also lead to a decrease in corrosion resistance. Currently, to protect the galvanized layer, multiple sets of roller dies are often used to progressively bend the steel plate. However, this requires precise adjustment of the spatial position of each set of dies under a unified benchmark, placing extremely high demands on assembly and debugging precision. In actual operation, multi-axis linkage alignment is difficult, easily generating cumulative errors, resulting in high process difficulty and low bending consistency. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a corrugated guardrail steel plate pressing and forming machine tool to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted in this invention is as follows: A corrugated guardrail steel plate pressing and forming machine tool is proposed, comprising: Bending roller sets are arranged in pairs on the upper and lower sides of the steel plate along the conveying path of the steel plate; The driver, mounted on the frame, is used to drive the bending roller assembly; The conveyor roller assembly drives the steel plate to move along a set conveying path; The bending roller group includes multiple arching dies that contact the steel plate and a transmission mechanism that drives the multiple arching dies to move cyclically. The arching dies are fixed outside the transmission mechanism. The area where the arching dies contact the steel plate is set as a bending and arching area. The steel plate moves in a first direction within the bending and arching area, and the arching dies move in a second direction within the bending and arching area. The first direction and the second direction are opposite. A limiting support plate is fixed inside the frame corresponding to the bending and arching area. The limiting support plate is located inside the transmission mechanism and is used to support the transmission mechanism so that when the multiple arching dies in the bending and arching area move, they can contact the steel plate one by one along a fixed baseline.

[0006] Furthermore, the plurality of arching molds are divided into at least two groups, and each group of arching molds contacts the steel plate sequentially according to a preset cycle. After the arching mold contacts the steel plate for one cycle, a bent portion is formed on the surface of the steel plate.

[0007] Furthermore, at least one bent portion is provided along the width direction on the steel plate, and shaped protrusions and shaped recesses are respectively provided on the arching molds distributed on the upper and lower sides of the steel plate corresponding to the bent portion. The number of each set of arching molds is set to N, and the height of the arch of the bent portion on the steel plate is L. In one cycle, the height of the arch of the bent portion when each arching mold contacts the steel plate is L / N.

[0008] Furthermore, the protruding and recessed parts of the shaped parts on the multiple arching molds in the same group increase in height in sequence according to their contact with the steel plate.

[0009] Furthermore, when each of the steel plates enters the bending and arching area, it first contacts the first arching mold in the same group.

[0010] Furthermore, the arching mold includes arching plates and limiting plates distributed along the width direction of the steel plate. The protruding part and the recessed part are both disposed on the arching plate, and the limiting plate is distributed between the arching plates. The limiting plate is located on the path of the non-bending area of ​​the steel plate.

[0011] Furthermore, the transmission mechanism includes a transmission belt and two transmission pulleys. The transmission belt loops around the outside of the two transmission pulleys. The transmission pulleys are driven to rotate, which in turn drives the outer transmission belt to circulate.

[0012] Furthermore, the outer side wall of the transmission belt is provided with a plurality of oiling blocks, which are distributed alternately with the arching mold in a cycle, and the oiling blocks are configured to coat the surface of the steel plate with lubricating oil.

[0013] Furthermore, the oiling block includes a sponge block, the oiling block is soaked in lubricating oil, the cross-section of the oiling block is set to be the same as the cross-section of the arching mold on the front side, and when the oiling block comes into contact with the surface of the steel plate, the oiling block coats the surface of the steel plate with lubricating oil.

[0014] Furthermore, along the length of the steel plate, the length of the arching mold is greater than the length of the oiling block, and the middle part of the arching mold is connected and fixed to the transmission belt.

[0015] Beneficial effects: This device uses multiple cyclically moving arching dies in conjunction with an inner fixed limiting support plate, so that all arching dies move along the same fixed baseline within the bending and arching area. This avoids the cumulative positioning error caused by the traditional method of adjusting multiple independent dies separately. By gradually increasing the height of the arching dies in the same group according to the contact sequence, the large deformation in a single operation is decomposed into multiple small deformations in a progressive arching process. The arching height is evenly distributed in each cycle, which can effectively reduce the deformation in a single forming and protect the galvanized layer from damage. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a corrugated guardrail steel plate pressing and forming machine tool proposed in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a corrugated guardrail steel plate pressing and forming machine tool according to an embodiment of the present invention; Figure 3 A schematic diagram of a bending roller assembly is provided for an embodiment of the present invention; Figure 4 This invention provides a schematic diagram of the arch-forming mold and steel plate in an embodiment of the invention. Figure 5 A schematic diagram of the arch-forming mold and the oiling block is provided for an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the gradual deformation of a steel plate in an arching mold, as presented in an embodiment of the present invention.

[0017] Among them, 01, steel plate; 011, bending section; 10, bending roller group; 100, bending and arching area; 11, arching mold; 111, arching plate; 112, limiting plate; 113, protruding part; 114, recessed part; 12, transmission mechanism; 121, transmission belt; 122, transmission wheel; 13, oiling block; 20, driver; 30, conveying roller group; 31, conveying roller; 40, frame; 41, limiting support plate.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a corrugated guardrail steel plate pressing and forming machine tool, including a bending roller group 10, a driver 20 and a conveying roller group 30.

[0022] The bending roller group 10 is arranged in pairs on the upper and lower sides of the steel plate 01 along the conveying path of the steel plate 01. The driver 20 is mounted on the frame 40 and is used to drive the bending roller group 10. The conveying roller group 30 drives the steel plate 01 to move along the set conveying path.

[0023] In some embodiments, the conveying roller group 30 includes a plurality of conveying rollers 31 arranged along the conveying path. The steel plate 01 is clamped between the upper and lower opposite conveying rollers 31, and the steel plate 01 is continuously fed in the horizontal direction by the rotation of the conveying rollers 31. The driver 20 may be a combination of a motor and a reducer, which drives the upper and lower bending roller groups 10 simultaneously or separately through a transmission method such as a chain, gear or synchronous belt, so that the upper and lower arching dies 11 maintain a synchronous and opposite motion relationship.

[0024] Furthermore, the bending roller group 10 includes a plurality of arching dies 11 that contact the steel plate 01 and a transmission mechanism 12 that drives the plurality of arching dies 11 to move cyclically. The arching dies 11 are fixed to the outside of the transmission mechanism 12. The area where the arching dies 11 contact the steel plate 01 is set as a bending and arching area 100. The steel plate 01 moves in a first direction within the bending and arching area 100, and the arching dies 11 move in a second direction within the bending and arching area 100. The first direction and the second direction are opposite.

[0025] In some embodiments, the first direction is the feeding direction of the steel plate 01 ( Figure 2(From left to right), the second direction is the direction of movement of the arching mold 11 within the bending and arching area 100 ( Figure 2 (From right to left) The two directions are opposite, thus forming a relative squeezing relationship in the contact area, so that the arching mold 11 can apply bending force to the surface of the steel plate 01 one after another and continuously.

[0026] Furthermore, a limiting support plate 41 is fixed inside the frame 40 at the corresponding bending and arching area 100. The limiting support plate 41 is located inside the transmission mechanism 12 and is used to support the transmission mechanism 12, so that when the multiple arching molds 11 in the bending and arching area 100 move, they can contact the steel plate 01 one by one along the fixed baseline.

[0027] In some embodiments, the limiting support plate 41 is a rigid flat plate or an arc-shaped plate, and its surface slides in contact with the inner side of the transmission mechanism 12. When the arching mold 11 moves within the bending and arching area 100 driven by the transmission mechanism 12, the limiting support plate 41 provides reaction force support from the inside, preventing the transmission mechanism 12 from deforming inward due to force, and ensuring that the spatial position of each arching mold 11 when contacting the steel plate 01 is always kept on the same baseline, thereby avoiding the cumulative positioning error caused by the independent adjustment of multiple sets of molds in the traditional solution.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments, the multiple arching molds 11 are divided into at least two groups. Each group of arching molds 11 contacts the steel plate 01 sequentially according to a preset cycle. After the arching mold 11 contacts the steel plate 01 for one cycle, a bent portion 011 is formed on the surface of the steel plate 01.

[0029] In this system, each set of arching dies 11 is distributed circumferentially along the transmission mechanism 12. Within the same set, the arching dies 11 sequentially pass through the bending and arching area 100 and come into contact with the steel plate 01. Different sets are staggered in time, forming a periodic loading process. One cycle refers to the process in which the same cross-section on the steel plate 01 sequentially comes into contact with all the arching dies 11 within a set. After one cycle, the bent portion 011 at that cross-section reaches the final designed shape.

[0030] like Figure 4 , Figure 5 and Figure 6 As shown, at least one bent portion 011 is provided on the steel plate 01 along the width direction. On the arching molds 11 distributed on the upper and lower sides of the steel plate 01, corresponding to the bent portion 011, there are respectively provided with mutually interlocking protruding parts 113 and recessed parts 114. The number of arching molds 11 in each group is set to N. The height of the bent portion 011 arching on the steel plate 01 is L. Then, in one cycle, the height of the arching of the bent portion 011 when each arching mold 11 contacts the steel plate 01 is L / N.

[0031] In this way, by evenly distributing the total arching height L to N successive forming operations, the amount of plastic deformation at each contact is controlled within a small range, avoiding cracking or peeling of the galvanized layer due to large deformation at one time, while reducing the forming force required for each forming operation.

[0032] Furthermore, the protruding parts 113 and recessed parts 114 on the multiple arching dies 11 within the same group increase in height sequentially according to their contact order with the steel plate 01. That is, the protruding and recessed parts on the first arching die 11 that contacts the steel plate 01 are the shortest, the second is slightly higher, and so on, with the last reaching the final designed height. This progressively increasing height structure allows the steel plate 01 to gradually complete the bending and forming process during continuous movement, without needing to apply excessive local pressure at a single station, which helps maintain the integrity of the galvanized layer.

[0033] Furthermore, when each steel plate 01 enters the bending and arching area 100, it first contacts the first arching die 11 in the same group. By controlling the speed matching relationship between the conveying roller group 30 and the transmission mechanism 12, it is ensured that the front end of the steel plate 01 meets the lowest first-level arching die 11 exactly when it enters the bending and arching area 100, thus avoiding unexpected impacts or forming deviations due to phase mismatch.

[0034] like Figure 4 As shown, the arching mold 11 includes an arching plate 111 and a limiting plate 112 distributed along the width direction of the steel plate 01. The protruding part 113 and the recessed part 114 are both provided on the arching plate 111. The limiting plate 112 is distributed between the arching plates 111 and is located on the path of the non-bending part 011 area on the steel plate 01.

[0035] The arching plate 111 is used to locally shape the bent portion 011, while the limiting plate 112 contacts the undeformed area of ​​the steel plate 01, serving as an auxiliary guide and preventing the steel plate 01 from shifting laterally. The limiting plate 112 between adjacent arching plates 111 can also limit the unintended warping of the steel plate 01 during the forming process, improving forming stability.

[0036] In some embodiments, the transmission mechanism 12 includes a transmission belt 121 and two transmission pulleys 122. The transmission belt 121 is looped around the outside of the two transmission pulleys 122. The transmission pulleys 122 are driven to rotate, driving the outer transmission belt 121 to circulate. The transmission belt 121 may be a synchronous belt, and the transmission pulleys 122 are correspondingly synchronous pulleys. The upper and lower transmission mechanisms 12 are driven by the same driver 20 via a synchronous transmission system, ensuring that the upper and lower arching dies 11 remain aligned within the bending and arching area 100.

[0037] Furthermore, multiple oiling blocks 13 are provided on the outer wall of the transmission belt 121. The oiling blocks 13 are distributed alternately with the arching mold 11, and the oiling blocks 13 are configured to apply lubricating oil to the surface of the steel plate 01. The oiling blocks 13 and the arching mold 11 are arranged at intervals. After the arching mold 11 completes one bending action, the subsequent oiling block 13 applies oil to the newly formed bent part 011 and the surrounding area, reducing the friction between the subsequent mold and the surface of the steel plate 01, and reducing the risk of scratches on the galvanized layer.

[0038] In some embodiments, the oiling block 13 includes a sponge block, which is impregnated with lubricating oil. The cross-section of the oiling block 13 is set to be the same as the cross-section of the arching mold 11 on the front side. When the oiling block 13 contacts the surface of the steel plate 01, the oiling block 13 applies lubricating oil to the surface of the steel plate 01. The identical cross-section allows the oiling block 13 to conform to the concave and convex shape of the bent portion 011, achieving uniform coating and preventing local accumulation or leakage of lubricating oil.

[0039] Furthermore, along the length of the steel plate 01, the length of the arching mold 11 is greater than the length of the oiling block 13, and the middle part of the arching mold 11 is connected and fixed to the transmission belt 121.

[0040] The relatively long length of the arching die 11 helps to stably transmit the forming force during contact, while the relatively short oiling block 13 reduces excessive consumption of lubricating oil. The arching die 11 is fixed to the transmission belt 121 through the middle part, which can ensure that the force on both sides of the fixing point is balanced and prevent the die from deflecting or loosening under repeated force.

[0041] In the traditional multi-group independent roller mold scheme, each group of molds needs to occupy an independent station in the steel plate 01 conveying direction. Sufficient spacing needs to be left between each group of molds to avoid interference. At the same time, each group of molds needs to be equipped with an independent adjustment mechanism and drive components. As a result, the total length of the entire bending station is usually proportional to the number of mold groups. For example, to achieve four progressive forming, four stations arranged in sequence are often required. The device length is large and occupies a lot of factory space.

[0042] Compared to traditional multi-set independent molds, this device can shorten the overall length of the device. This device adopts a cyclic movement transmission mechanism 12 and a fixed reference line design. Multiple arching molds 11 are closely arranged circumferentially along the transmission belt 121. Only one station is needed in the bending and arching area 100 to complete the successive contact forming of multiple molds. The arching molds 11 are distributed cyclically in space rather than arranged in a straight line. The conveying length required for forming is only equivalent to the length of the contact area between a single arching mold 11 and the steel plate. Compared with the total length of multiple sets of molds arranged in a straight line in the traditional solution, this is reduced. It is especially suitable for construction sites or workshops with limited equipment installation space.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A corrugated guardrail steel plate pressing and forming machine, characterized in that, include: Bending roller sets (10) are arranged in pairs on the upper and lower sides of the steel plate (01) along the conveying path of the steel plate (01); A driver (20) is used to drive the bending roller group (10) to rotate; Conveying roller assembly (30) drives the steel plate (01) to move along the conveying path; The bending roller group (10) includes a plurality of arching dies (11) that contact the steel plate (01) and a transmission mechanism (12) that drives the plurality of arching dies (11) to move cyclically. The arching dies (11) are fixed outside the transmission mechanism (12). The area where the arching dies (11) contact the steel plate (01) is set as a bending arching area (100). The steel plate (01) moves in a first direction in the bending arching area (100), and the arching dies (11) move in a second direction in the bending arching area (100). The first direction and the second direction are opposite. A limiting support plate (41) is fixed inside the frame (40) at the location corresponding to the bending and arching area (100). The limiting support plate (41) is located inside the transmission mechanism (12) and is used to support the transmission mechanism (12) so that when the multiple arching molds (11) in the bending and arching area (100) move, they can contact the steel plate (01) one by one along a fixed baseline.

2. The corrugated guardrail steel plate pressing and forming machine tool according to claim 1, characterized in that: The multiple arching molds (11) are divided into at least two groups. Each group of arching molds (11) contacts the steel plate (01) in sequence according to a preset cycle. After the arching mold (11) contacts the steel plate (01) for one cycle, a bent portion (011) is formed on the surface of the steel plate (01).

3. The corrugated guardrail steel plate pressing and forming machine tool according to claim 2, characterized in that: At least one bent portion (011) is provided on the steel plate (01) along the width direction. On the arching mold (11) distributed on the upper and lower sides of the steel plate (01), a shaped protrusion (113) and a shaped recess (114) are respectively provided at the bent portion (011) to fit together. The number of each set of arching molds (11) is set to N. The height of the bent portion (011) arching on the steel plate (01) is L. In one cycle, when each arching mold (11) contacts the steel plate (01), the height of the arching of the bent portion (011) is L / N.

4. The corrugated guardrail steel plate pressing and forming machine tool according to claim 3, characterized in that: The protruding parts (113) and recessed parts (114) on the multiple arching molds (11) in the same group increase in height in sequence according to their contact with the steel plate (01).

5. The corrugated guardrail steel plate pressing and forming machine tool according to claim 4, characterized in that: When each of the steel plates (01) enters the bending and arching area (100), it first contacts the first arching mold (11) in the same group.

6. The corrugated guardrail steel plate pressing and forming machine tool according to claim 3, characterized in that: The arching mold (11) includes an arching plate (111) and a limiting plate (112) distributed along the width direction of the steel plate (01). The protruding part (113) and the recessed part (114) are both provided on the arching plate (111). The limiting plate (112) is distributed between the arching plates (111) and is located on the path of the non-bent part (011) area on the steel plate (01).

7. The corrugated guardrail steel plate pressing and forming machine tool according to claim 1, characterized in that: The transmission mechanism (12) includes a transmission belt (121) and two transmission wheels (122). The transmission belt (121) is looped around the outside of the two transmission wheels (122). The transmission wheels (122) are driven to rotate and drive the outer transmission belt (121) to circulate.

8. The corrugated guardrail steel plate pressing and forming machine tool according to claim 7, characterized in that: Multiple oiling blocks (13) are provided on the outer side wall of the transmission belt (121). The oiling blocks (13) are distributed alternately with the arching mold (11) in a cycle. The oiling blocks (13) are configured to coat the surface of the steel plate (01) with lubricating oil.

9. The corrugated guardrail steel plate pressing and forming machine tool according to claim 8, characterized in that: The oiling block (13) includes a sponge block, the oiling block (13) is soaked in lubricating oil, the cross section of the oiling block (13) is set to be the same as the cross section of the arching mold (11) on the front side, and when the oiling block (13) contacts the surface of the steel plate (01), the oiling block (13) coats the surface of the steel plate (01) with lubricating oil.

10. The corrugated guardrail steel plate pressing and forming machine tool according to claim 9, characterized in that: Along the length direction of the steel plate (01), the length of the arching mold (11) is greater than the length of the oiling block (13), and the middle part of the arching mold (11) is connected and fixed to the transmission belt (121).

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