Bending machine for manufacturing distribution box

Abstract

The utility model relates to the technical field of bending equipment, and the utility model provides a bending machine for switchgear cabinet manufacturing, solves the problem that existing bending machine upper die replacement is complicated, the bending machine includes frame, upper die unit and lower die unit, the upper die unit is located in the frame, and it contains lifting drive mechanism, upper die holder, bending die and two turnover limit plates, lifting drive mechanism is located in the frame and the outgoing end is towards the below, the upper die holder is fixedly connected in the outgoing end of lifting drive mechanism, the bottom surface of upper die holder is provided with the installation sliding slot, and the bending die is slidably connected in the installation sliding slot, two turnover limit plates are swinged and are connected in the upper die holder and are located in the both sides of installation sliding slot, can pass through the rotation of the installation sliding slot end portion and block. Lower die unit is horizontally slidably connected in the frame and is below the upper die unit. The scheme realizes the quick replacement of upper die through the sliding cooperation of bending die and installation sliding slot, the blocking position of turnover limit plate, reduces the equipment downtime, and improves the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bending equipment technology, specifically to a bending machine for manufacturing electrical distribution boxes and cabinets. Background Technology

[0002] As core equipment in power systems used for distributing electrical energy and protecting circuits, distribution boxes and cabinets are mostly made of sheet metal parts through processes such as cutting, bending, and welding. Among these processes, bending directly determines the forming accuracy of the sheet metal parts and the suitability of the cabinet assembly, making the bending machine the key equipment in this process. Existing bending machines for manufacturing electrical distribution boxes and cabinets typically include a worktable, an upper die assembly (including an upper mold) located above the worktable, a lower die assembly (including a lower mold) located on the worktable, and a power mechanism for driving the upper die assembly to rise and fall. During operation, the sheet metal part is placed on the lower mold, and the power mechanism drives the upper mold to descend, working in conjunction with the lower mold to complete the bending and forming of the sheet metal part. Because distribution box cabinets come in various specifications, the bending dimensions and angles of the sheet metal parts corresponding to different cabinet specifications vary. Therefore, it is necessary to frequently change the upper mold to adapt to different processing requirements. In existing technology, the connection between the upper mold and the upper mold assembly is mostly a bolt-fastened structure. When changing the upper mold, tools must be used to remove the fastening bolts one by one, the old mold must be removed, the mounting holes of the new mold must be aligned with the connection holes of the upper mold assembly, and finally the bolts must be tightened one by one to complete the fixation. This replacement process is cumbersome, requiring repeated disassembly and installation of multiple bolts, and the mold position must be adjusted multiple times when aligning the mounting holes. It is time-consuming, and frequent replacements increase equipment downtime, significantly reducing overall production efficiency. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this utility model provide a bending machine for manufacturing distribution boxes and cabinets, which solves the technical problem of cumbersome upper mold replacement steps in the prior art.

[0004] According to one aspect, at least one embodiment of the present invention provides a bending machine for manufacturing distribution box cabinets, comprising: frame; The upper mold unit is mounted on the frame; The lower mold unit is horizontally slidably connected to the frame and located below the upper mold unit; The upper mold unit includes: A lifting drive mechanism is mounted on the frame, with its extended end facing the lower mold unit; An upper mold base is located at the extended end of the lifting drive mechanism, and an installation groove is provided on the bottom surface of the upper mold base; The bending die is slidably connected within the mounting groove; Two flip-limiting plates are oscillatingly connected to the upper mold base and located on both sides of the mounting groove. The flip-limiting plates can seal the ends of the mounting groove by rotating.

[0005] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, a linkage rod is provided between the two flipping limit plates. The linkage rod can drive the two flipping limit plates to swing synchronously. When the flipping limit plate blocks the end of the mounting groove, the linkage rod contacts the side wall of the upper mold base to limit the swing range of the flipping limit plate.

[0006] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, the flipping limit plate has a gripping part.

[0007] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, the side wall of the upper mold base is provided with a first elastic buckle, and the first elastic buckle is located on the movement path of the linkage rod; When the flip-limiting plate blocks the end of the mounting groove, the linkage rod engages with the first elastic buckle to fix the position of the flip-limiting plate.

[0008] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, the side wall of the upper mold base is further provided with a second elastic buckle, and the second elastic buckle is located above the first elastic buckle; When the flip-limiting plate opens the end of the mounting groove, the linkage rod engages with the second elastic buckle to fix the position of the flip-limiting plate.

[0009] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, the lifting drive mechanism is lifted and connected to the frame.

[0010] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of this utility model, the lower die unit includes: The base slide is horizontally slidably connected to the frame and located below the upper mold unit. The base slide is fastened to the frame by a first fastener. The lower mold is slidably connected to the base slide, and the lower mold is fastened to the base slide by a second fastener.

[0011] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of this utility model, the lower die unit further includes: The mounting base is located on one side of the lower mold; A positioning plate is slidably connected to the mounting base. The positioning plate can slide closer to or further away from the lower mold to abut against the end face of the workpiece to be bent, so as to position the workpiece to be bent on the lower mold.

[0012] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of this utility model, the lower die unit further includes: Two centering rods are slidably connected to the side of the lower mold away from the mounting base. The sliding direction of the centering rods is perpendicular to the sliding direction of the positioning plate. A centering elastic element is provided between the two centering rods and the lower mold. The centering elastic element is used to provide a pushing force to bring the two centering rods closer to each other. The two centering rods can abut against both sides of the workpiece to be bent, so that the workpiece to be bent is centered on the lower mold.

[0013] For example, in a bending machine for manufacturing distribution box cabinets provided in at least one embodiment of the present invention, the frame has a mounting column, and the lifting drive mechanism is lifted and connected to the mounting column.

[0014] The beneficial effects of the embodiments of this utility model are as follows: In this invention, the bending die and the upper die base are slidably connected by a mounting groove, replacing the traditional bolt connection where the mounting holes need to be aligned. There is no need to repeatedly adjust the die position to match the connection hole. The bending die can be picked up and initially positioned directly by sliding, which greatly simplifies the positioning steps in the die replacement process and reduces the complexity of operation.

[0015] Two flip-limiting plates are oscillatingly connected to the upper mold base and can seal the end of the installation slide. The bending mold can be fixed and released by rotating the limiting plates. There is no need to use tools to disassemble and install bolts one by one, which saves the tedious disassembly and assembly process in the traditional fastening structure and reduces the operation time and manpower input for mold replacement.

[0016] The combination of sliding connection and flipping limit plate allows bending die replacement to be completed in just two core operations: sliding the die and rotating the limit plate. Compared with the multi-step disassembly and assembly process of traditional bolt connection, it significantly shortens the time spent on a single replacement, reduces equipment downtime caused by frequent die replacement, and directly improves overall production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a bending machine for manufacturing distribution box cabinets in one embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view at point B in the middle; Figure 4 for Figure 1 A schematic diagram of the bending machine from another angle in the embodiment; Figure 5 for Figure 4 Enlarged view of point C.

[0019] In the diagram: 1. Frame, 2. Upper mold unit, 3. Lower mold unit, 21. Lifting drive mechanism, 22. Upper mold base, 221. Mounting slide, 23. Bending mold, 24. Flipping limit plate, 25. Linkage rod, 241. Grip part, 26. First elastic buckle, 27. Second elastic buckle, 31. Base slide, 32. Lower mold, 33. Mounting base, 34. Positioning plate, 35. Centering rod, 36. Centering elastic element, 11. Mounting column. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 this utility model.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] As the core equipment for distributing electrical energy and protecting circuits in a power system, the internal busbars of distribution boxes and cabinets are key components for power transmission. These busbars need to be processed into specific shapes and sizes according to the specifications of the distribution box and cabinet, making CNC busbar bending machines a core piece of equipment in the distribution box and cabinet manufacturing process. Existing CNC busbar bending machines require frequent changes of the upper die when processing busbars of different specifications. These upper dies are often fixed using bolt locking or complex snap-fit ​​structures, requiring specialized tools to disassemble each fixing component during replacement. After disassembly, the new die must be repositioned and calibrated, leading to long downtime, low production efficiency, and high operator skill requirements. Positioning deviations can easily affect the bending accuracy of the busbars, increasing manufacturing errors and rework costs for the distribution box and cabinet. To solve these problems, this embodiment provides a bending machine for manufacturing distribution boxes and cabinets. By optimizing the die connection structure and positioning mechanism, it achieves rapid upper die replacement and precise workpiece positioning, improving equipment adaptability and production efficiency.

[0026] like Figure 1As shown, the bending machine for manufacturing distribution box cabinets in this embodiment includes a frame 1, an upper die unit 2, and a lower die unit 3. The frame 1 provides a supporting foundation for the entire equipment, and a vertically extending mounting column 11 is fixed to its top. The mounting column 11 has a guide groove extending vertically on its side. This guide groove is used to cooperate with the lifting drive mechanism 21 to achieve stable lifting and lowering, limit the lateral displacement of the lifting drive mechanism 21, ensure the verticality of the lifting drive mechanism 21 during the lifting process, and thus ensure the alignment accuracy between the lower die 32 and the bending die 23 when it descends, avoiding bending errors caused by lifting offset. The upper die unit 2 is set on the mounting column 11 and can be lifted and lowered along the mounting column 11; the lower die unit 3 is horizontally slidably connected to the top of the frame 1 and is located directly below the upper die unit 2. Its position can be adjusted horizontally along the frame 1 to adapt to the bending requirements of different specifications of busbars.

[0027] The upper die unit 2 includes a lifting drive mechanism 21, an upper die base 22, a bending die 23, and two flipping limit plates 24. The lifting drive mechanism 21 can be a hydraulic cylinder or a pneumatic cylinder. A guide block adapted to the guide groove of the mounting column 11 is fixed to the side of the cylinder body. The guide block is embedded in the guide groove, allowing the lifting drive mechanism 21 to move stably up and down along the mounting column 11. This arrangement allows the initial distance between the upper die unit 2 and the lower die unit 3 to be adjusted according to the thickness of the workpiece to be bent, adapting to the bending requirements of workpieces of different thicknesses. This avoids difficulties in workpiece placement or wasted stroke due to a fixed distance, improving the equipment's adaptability to workpieces of different specifications. The extended end of the lifting drive mechanism 21 faces the lower die unit 3 downwards. This extended end is specifically the piston rod of a hydraulic cylinder or a pneumatic cylinder, which can extend and retract vertically, providing a downward bending force to the bending die 23. The upper mold base 22 is fixedly connected to the extended end of the lifting drive mechanism 21 and rises and falls synchronously with the extended end. The bottom surface of the upper mold base 22 is provided with a horizontally extending mounting groove 221. The cross-section of the mounting groove 221 is T-shaped or rectangular, which is used to cooperate with the bending mold 23 to achieve a sliding connection.

[0028] The top of the bending die 23 is provided with a slider that is compatible with the mounting groove 221. The slider is embedded in the mounting groove 221 so that the bending die 23 can slide horizontally along the mounting groove 221. This sliding connection method eliminates the need for alignment of mounting holes and connection holes when installing and disassembling the bending die 23. Position adjustment can be achieved directly by sliding, simplifying the positioning steps for die replacement. Two flip-limiting plates 24 are located at both ends of the mounting groove 221. Both are oscillatingly connected to the bottom surface of the upper mold base 22 via a horizontally set swing shaft. The flip-limiting plates 24 can rotate around the swing shaft in the vertical plane. When the flip-limiting plates 24 rotate to the horizontal position, their ends cover the end opening of the mounting groove 221, restricting the bending mold 23 from sliding out. When the flip-limiting plates 24 rotate to the vertical position, the end opening of the mounting groove 221 is fully open, facilitating the placement and removal of the bending mold 23. This structure replaces the traditional bolt fastening structure, eliminating the need for tools to disassemble and install bolts, reducing operational steps. In conjunction with the sliding connection of the mounting groove 221, the replacement of the bending mold can be completed simply by sliding the mold and the swing-limiting plates, significantly shortening the replacement time, reducing equipment downtime, and improving production efficiency.

[0029] Optionally, to achieve synchronized operation of the two flipping limit plates 24 and avoid inconsistent limiting caused by unilateral operation, such as Figure 2 As shown, a linkage rod 25 is provided between the two flipping limit plates 24. The two ends of the linkage rod 25 are fixedly connected to the middle of the two flipping limit plates 24 respectively to form a rigid linkage structure. This connection method enables the two flipping limit plates 24 to swing synchronously, avoids the inconsistency of the limit plate position caused by unilateral operation, and ensures the reliability of the limit of the bending die 23 in the installation groove 221.

[0030] When the operator rotates any of the flip-limit plates 24, the linkage rod 25 can drive the other flip-limit plate 24 to rotate synchronously around the swing axis. At the same time, the side wall of the upper mold base 22 has a planar structure. When the flip-limit plate 24 rotates to the position of the end of the sealing installation groove 221, the side of the linkage rod 25 away from the flip-limit plate 24 contacts the planar structure, restricting the flip-limit plate 24 from continuing to rotate closer to the installation groove 221. This clearly defines the sealing position of the flip-limit plate 24, eliminating the need for manual judgment of whether the limit plate is in place and improving operational accuracy.

[0031] Furthermore, to facilitate the operator's rotation of the tilting limit plate 24 and reduce operational intensity, a gripping part 241 is formed by extending outward from the end of the tilting limit plate 24 away from the swing axis. The extension direction of the gripping part 241 is consistent with the swing plane of the tilting limit plate 24. The gripping part 241 provides the operator with a point of force application, while increasing the operating lever arm, reducing the force required to rotate the tilting limit plate 24, and reducing physical exertion; it also avoids slippage caused by directly gripping the tilting limit plate 24 body, improving operational safety and convenience. The operator can apply force by gripping the gripping part 241 to drive the tilting limit plate 24 to rotate.

[0032] Optionally, to fix the position of the flip-up limiting plate 24 in the blocked and open states and prevent it from moving accidentally due to vibration, such as... Figure 2 As shown, the side wall of the upper mold base 22 is provided with a first elastic buckle 26 and a second elastic buckle 27. Both the first elastic buckle 26 and the second elastic buckle 27 are metal sheets with elastic deformation capability. One end of each is fixed to the side wall of the upper mold base 22, and the other end extends away from the upper mold base 22 and is bent at the end. Through elastic deformation, the linkage rod 25 can be locked and fixed. The first elastic buckle 26 is located on the movement path of the linkage rod 25 in the blocking state of the flipping limit plate 24. The second elastic buckle 27 is located above the first elastic buckle 26 and on the movement path of the linkage rod 25 in the opening state of the flipping limit plate 24. When the flipping limit plate 24 rotates to the end of the sealing installation groove 221, the linkage rod 25 presses the bent end of the first elastic buckle 26, causing the first elastic buckle 26 to undergo elastic deformation. After the linkage rod 25 passes the bent end, the first elastic buckle 26 resets and locks onto the side of the linkage rod 25 away from the upper mold base 22, restricting the linkage rod 25 from moving upward. When the flipping limiting plate 24 rotates to the end of the opening installation slide 221, the linkage rod 25 moves upward and presses the bent end of the second elastic buckle 27, causing the second elastic buckle 27 to undergo elastic deformation. After the linkage rod 25 passes the bent end, the second elastic buckle 27 resets and engages with the linkage rod 25, restricting the linkage rod 25 from moving downward. This structure fixes the flipping limiting plate 24 in the blocked and open states respectively, preventing the flipping limiting plate 24 from moving accidentally due to vibration during bending operations, and ensuring the fixed stability of the bending die 23. At the same time, no additional locking parts are required, further simplifying the operation steps.

[0033] The lower mold unit 3 includes a base slide 31 and a lower mold 32, such as Figure 1 and Figure 4As shown. The base slide 31 is horizontally slidably connected to the top of the frame 1 via a slide rail slider structure. The slide rail extends along the length of the frame 1, and the slider is fixed to the bottom of the base slide 31. The slider is embedded in the slide rail, allowing the base slide 31 to slide along the slide rail. A first fastener, which can be a bolt, is provided through the side wall of the base slide 31. When the first fastener is tightened, its end is in close contact with the slide rail at the top of the frame 1, fixing the position of the base slide 31 by friction. When the first fastener is loosened, the position of the base slide 31 can be adjusted along the slide rail.

[0034] The lower mold 32 is horizontally slidably connected to the top of the base slide 31 via another set of slide rails and sliders. The extension direction of this set of slide rails is perpendicular to the extension direction of the slide rails at the bottom of the base slide 31. A slider adapted to the slide rails is fixed at the bottom of the lower mold 32, allowing the lower mold 32 to slide along the width direction of the base slide 31. This structure enables two-dimensional position adjustment of the lower mold 32 on the horizontal plane, adapting to different bending position requirements. A second fastener, also a bolt, is provided through the side wall of the lower mold 32. When the second fastener is tightened, its end is in close contact with the slide rail at the top of the base slide 31, fixing the position of the lower mold 32. When the second fastener is loosened, the position of the lower mold 32 can be adjusted. The fastener fixes the position through friction, ensuring the stability of the lower mold 32 after adjustment and preventing position displacement during bending.

[0035] Optionally, to achieve horizontal end positioning of the workpiece to be bent, such as... Figure 3 As shown, the lower mold unit 3 also includes a mounting base 33 and a positioning plate 34. The mounting base 33 is fixed to one side of the lower mold 32, providing a mounting base for the positioning plate 34. The top of the mounting base 33 has a slide rail extending in a direction close to or away from the lower mold 32. The bottom of the positioning plate 34 has a slider adapted to the slide rail. The slider is embedded in the slide rail, allowing the positioning plate 34 to slide along the slide rail. This sliding method allows the positioning plate 34 to adjust its distance from the lower mold 32 according to the length of the workpiece. One side of the positioning plate 34 is perpendicular to its sliding direction. This side can abut against the end face of the workpiece to be bent. End positioning is achieved by abutting against the end face of the workpiece, avoiding errors in manual visual positioning, ensuring the consistency of bending position of workpieces in the same batch, and improving bending accuracy and product qualification rate.

[0036] Furthermore, to achieve centered positioning of the workpiece to be bent perpendicular to the positioning direction, such as... Figure 5As shown, the lower mold unit 3 also includes two centering rods 35 and two centering elastic elements 36. The two centering rods 35 are respectively disposed on the side of the lower mold 32 away from the mounting base 33. The side of the lower mold 32 has a horizontally extending guide hole. The extension direction of the guide hole is perpendicular to the sliding direction of the positioning plate 34. The centering rods 35 pass through the guide hole, so that the centering rods 35 can slide along the guide hole, providing sliding guidance for the centering rods 35. The centering elastic element 36 can be a compression spring, which is sleeved on the outside of the centering rod 35. One end of the centering elastic element 36 is fixedly connected to the side of the lower mold 32, and the other end is fixedly connected to the end of the centering rod 35. In its natural state, the centering elastic element 36 is in a compressed state, and its elastic force pushes the two centering rods 35 closer to each other, so that an initial gap is formed between the two centering rods 35. This structure allows the centering rods 35 to automatically adapt to the width of the workpiece and abut against both sides of the workpiece to achieve centering positioning. No manual adjustment is required, simplifying the positioning steps, while ensuring the symmetry of the workpiece perpendicular to the positioning direction and avoiding errors caused by bending asymmetry.

[0037] The working process of this embodiment is divided into a bending die replacement process and a bending operation process.

[0038] During the bending die replacement process, the operator first grasps the gripping part 241 of the flipping limit plate 24 and applies upward force, causing the flipping limit plate 24 to rotate around the swing axis. At this time, the linkage rod 25 moves upward with the flipping limit plate 24, pressing the bent end of the second elastic buckle 27, causing the second elastic buckle 27 to undergo elastic deformation. After the linkage rod 25 passes the bent end of the second elastic buckle 27, the second elastic buckle 27 resets and engages with the linkage rod 25, fixing the position of the flipping limit plate 24. At this time, the end opening of the mounting groove 221 is fully open. The operator slides the old bending die 23 along the mounting groove 221 and removes it, and then slides the new bending die 23 along the mounting groove 221 to the preset working position, ensuring that the slider of the bending die 23 is fully embedded in the mounting groove 221.

[0039] The operator then grips the gripping part 241 again, applying downward force to cause the flipping limit plate 24 to rotate in the opposite direction. The linkage rod 25 moves down and presses the bent end of the first elastic buckle 26, causing the first elastic buckle 26 to undergo elastic deformation. After the linkage rod 25 passes the bent end of the first elastic buckle 26, the first elastic buckle 26 resets and engages with the linkage rod 25, fixing the position of the flipping limit plate 24. At this time, the flipping limit plate 24 blocks the end opening of the mounting groove 221, and the bending die 23 is restricted in the mounting groove 221 and cannot slide out, thus completing the replacement of the bending die.

[0040] During the bending operation, the height of the lifting drive mechanism 21 is first adjusted according to the thickness of the workpiece to be bent: the locking parts between the cylinder of the lifting drive mechanism 21 and the mounting column 11 are loosened, and the lifting drive mechanism 21 is pushed to slide along the guide groove of the mounting column 11 until the initial distance between the upper die unit 2 and the lower die unit 3 matches the thickness of the workpiece. Then the locking parts are tightened to fix the position of the lifting drive mechanism 21. This adjustment process relies on the guide groove of the mounting column 11 to ensure the accuracy of the lifting direction and avoid deviation.

[0041] Adjust the position of the lower die unit 3 according to the bending position requirements of the workpiece: Loosen the first fastener, push the base slide 31 to slide along the slide rail of the frame 1, adjust the relative position of the base slide 31 and the upper die unit 2, and tighten the first fastener after adjustment; Loosen the second fastener, push the lower die 32 to slide along the slide rail of the base slide 31, further adjust the relative position of the lower die 32 and the bending die 23, tighten the second fastener to fix the lower die 32. The two-dimensional adjustment structure ensures that the lower die 32 can accurately adapt to different bending position requirements. Adjust the position of the positioning plate 34 according to the length of the workpiece: Push the positioning plate 34 to slide along the slide rail of the mounting base 33, so that the distance between the positioning plate 34 and the lower die 32 is adapted to the length of the workpiece, providing a reference for the positioning of the workpiece end.

[0042] The workpiece to be bent is placed on top of the lower mold 32, with one end of the workpiece abutting against the surface of the positioning plate 34. Simultaneously, both sides of the workpiece contact the two centering rods 35, pushing them to slide outwards. During the sliding process, the centering rods 35 compress the centering elastic element 36, and the elastic force of the centering elastic element 36 reacts to the centering rods 35, causing them to tightly abut against both sides of the workpiece, achieving centered positioning. The positioning plate 34 and the centering rods 35 work together to ensure accurate positioning of the workpiece on the horizontal plane, avoiding positional deviation. The lifting drive mechanism 21 is activated, and its extended end extends downwards, driving the upper mold base 22 and the bending mold 23 to descend synchronously. The bottom of the bending mold 23 contacts the top of the workpiece and applies pressure. Combined with the top structure of the lower mold 32, this causes the workpiece to undergo plastic deformation, completing the bending. The stable lifting of the lifting drive mechanism 21 and the precise alignment of the upper and lower molds ensure a stable bending process and improve bending quality. After bending is completed, the extended end of the lifting drive mechanism 21 retracts upward, driving the upper mold base 22 and bending mold 23 to reset. The operator then removes the bent workpiece, completing one bending operation.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bending machine for manufacturing distribution box cabinets, characterized in that, include: Rack (1); The upper mold unit (2) is mounted on the frame (1); The lower mold unit (3) is horizontally slidably connected to the frame (1) and located below the upper mold unit (2); The upper mold unit (2) includes: The lifting drive mechanism (21) is located on the frame (1) and its extended end faces the lower mold unit (3). The upper mold base (22) is located at the extended end of the lifting drive mechanism (21), and the bottom surface of the upper mold base (22) is provided with an installation groove (221). The bending die (23) is slidably connected to the mounting groove (221); Two flip-limiting plates (24) are oscillatingly connected to the upper mold base (22) and located on both sides of the mounting groove (221). The flip-limiting plates (24) can seal the end of the mounting groove (221) by rotating.

2. A bending machine for manufacturing distribution boxes and cabinets according to claim 1, characterized in that, A linkage rod (25) is provided between the two flipping limit plates (24). The linkage rod (25) can drive the two flipping limit plates (24) to swing synchronously. When the flipping limit plate (24) blocks the end of the mounting groove (221), the linkage rod (25) contacts the side wall of the upper mold base (22) to limit the swing range of the flipping limit plate (24).

3. A bending machine for manufacturing distribution boxes and cabinets according to claim 1, characterized in that, The flip-limiting plate (24) has a gripping part (241).

4. A bending machine for manufacturing distribution boxes and cabinets according to claim 2, characterized in that, The side wall of the upper mold base (22) is provided with a first elastic buckle (26), and the first elastic buckle (26) is located on the movement path of the linkage rod (25); When the flip-limiting plate (24) blocks the end of the mounting groove (221), the linkage rod (25) is engaged with the first elastic buckle (26) to fix the position of the flip-limiting plate (24).

5. A bending machine for manufacturing distribution box cabinets according to claim 4, characterized in that, The side wall of the upper mold base (22) is also provided with a second elastic buckle (27), which is located above the first elastic buckle (26); When the flip-limiting plate (24) opens the end of the mounting groove (221), the linkage rod (25) engages with the second elastic buckle (27) to fix the position of the flip-limiting plate (24).

6. A bending machine for manufacturing distribution box cabinets according to claim 1, characterized in that, The lifting drive mechanism (21) is lifted and connected to the frame (1).

7. A bending machine for manufacturing distribution box cabinets according to claim 1, characterized in that, The lower mold unit (3) includes: The base slide (31) is horizontally slidably connected to the frame (1) and located below the upper mold unit (2). The base slide (31) is fastened to the frame (1) by a first fastener. The lower mold (32) is slidably connected to the base slide (31), and the lower mold (32) is fastened to the base slide (31) by a second fastener.

8. A bending machine for manufacturing distribution boxes and cabinets according to claim 7, characterized in that, The lower mold unit (3) also includes: Mounting base (33) is provided on one side of the lower mold (32); The positioning plate (34) is slidably connected to the mounting base (33). The positioning plate (34) can slide closer to or further away from the lower mold (32) to abut against the end face of the workpiece to be bent, so as to position the workpiece to be bent on the lower mold (32).

9. A bending machine for manufacturing distribution boxes and cabinets according to claim 8, characterized in that, The lower mold unit (3) also includes: Two centering rods (35) are slidably connected to the side of the lower mold (32) away from the mounting base (33). The sliding direction of the centering rods (35) is perpendicular to the sliding direction of the positioning plate (34). A centering elastic element (36) is provided between the two centering rods (35) and the lower mold (32). The centering elastic element (36) is used to provide a pushing force to bring the two centering rods (35) closer to each other. The two centering rods (35) can abut against both sides of the workpiece to be bent so that the workpiece to be bent is centered on the lower mold (32).

10. A bending machine for manufacturing distribution box cabinets according to claim 6, characterized in that, The frame (1) has a mounting column (11), and the lifting drive mechanism (21) is lifted and connected to the mounting column (11).

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