A kind of folding device for switchboard plate processing

Abstract

This invention discloses a bending device for processing power distribution cabinet sheet metal, comprising an upper die assembly, a lower die assembly, and a lateral bending mechanism. The upper die assembly includes a drive unit and a central forming block. Multiple first bending modules, capable of radially sliding relative to the central forming block, are arranged around the periphery of the central forming block. The outer wall of each first bending module has a forming groove. The lower die assembly includes a lower template, a support platform, and a fixed frame. The inner side of the fixed frame is provided with a guide structure corresponding to the first bending modules. The lateral bending mechanism includes a drive block and a second bending module, the second bending module having bending edges. This bending device for processing power distribution cabinet sheet metal integrates three key processes—vertical bending on all four sides, box-shaped shaping, and inward rolling of the upper side edges—into a single continuous stamping stroke through the wedge mechanism between the central forming block and the first bending modules, and the drive mechanism between the drive block and the second bending modules. This significantly shortens the processing cycle and improves processing quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of sheet metal bending technology, and more specifically, to a bending device for processing sheet metal for power distribution cabinets. Background Technology

[0002] Distribution cabinets are key equipment in power systems used to receive and distribute electrical energy. Distribution cabinets mainly consist of a housing, switches, wires, and protective devices. The housing is an important component of the distribution cabinet, and its main function is to protect the internal electrical equipment and components from the influence of the external environment. The housing is usually made by cutting, bending, and assembling metal sheets during processing.

[0003] To improve the structural strength and rigidity of the distribution cabinet shell, and to eliminate sharp edges and ensure safety, it is often necessary to bend the upper edge of the side of the distribution cabinet box (i.e., the edge of the box opening) inward to form a rolled edge. Traditional bending equipment, when processing the distribution cabinet sheet material, usually first puts a flat sheet material that has been cut into a bending machine, and rolls the upper edge of the four sides of the distribution cabinet box. Then, the upper die of the bending machine presses down and cooperates with the lower die to fold up two opposite long sides (or short sides) of the box simultaneously or sequentially, forming two upright side walls. Next, the semi-finished sheet material is taken out of the machine, flipped or rotated, so that the other two unbent sides are aligned with the upper and lower dies. After repositioning, it is stamped again. At this time, the bending machine bends the remaining two sides into shape, thus forming a complete box-shaped structure with rolled edges.

[0004] Traditional bending devices for processing electrical distribution cabinet panels require multiple independent bending operations and multiple repositioning, which is inefficient. Furthermore, multiple clamping and positioning can introduce cumulative errors, potentially leading to problems such as inconsistent diagonal dimensions, non-perpendicular angles, or irregular shapes. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a bending device for processing power distribution cabinet panels, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A bending device for processing power distribution cabinet sheet metal includes an upper die assembly and a lower die assembly. The upper die assembly includes a driving part and a central forming block connected below the driving part. Multiple first bending modules that can slide radially relative to the central forming block are arranged around the periphery of the central forming block. The outer wall of each first bending module has a forming groove. The lower die assembly includes a lower template, a support platform connected to the surface of the lower template via an elastic reset member, and a fixed frame surrounding the support platform. The inner side of the fixed frame is provided with a guide structure corresponding to the first bending modules. The device also includes a lateral bending mechanism. The bending mechanism includes a drive block fixed to the drive unit and a second bending module slidably disposed on the fixed frame. The second bending module has a bending edge on the side near the support platform. When the upper die assembly moves downward, the first bending module expands radially outward under the drive of the central forming block and interacts with the guide structure to bend the four sides of the sheet metal upward. As the upper die assembly continues to move downward, the drive block drives the second bending module to move horizontally toward the sheet metal, and simultaneously bends the upper end of the side of the sheet metal in the forming groove from the side through the bending edge.

[0007] Preferably, the guide structure is an arc-shaped guide surface.

[0008] Preferably, the driving unit includes an upper template and a connecting plate connected to the bottom of the upper template via a first guide and reset assembly. The central forming block is fixed to the bottom of the connecting plate, one end of the driving block is fixed to the bottom of the upper template, and the other end of the driving block extends out of the connecting plate.

[0009] Preferably, the outer wall of the central forming block has multiple first inclined surfaces, the side wall of the first bending module has a second inclined surface that cooperates with the corresponding first inclined surface, and a second guide reset component is provided between the first bending module and the connecting plate.

[0010] Preferably, the drive block has an inclined drive surface, and the second bending module has a pressure-bearing surface that cooperates with the drive surface.

[0011] Preferably, the surface of the lower template is fixedly connected with multiple vertical plates, each vertical plate corresponding to a second bending module, and a third guide reset component is provided between the second bending module and the corresponding vertical plate.

[0012] Preferably, the first guide reset assembly, the second guide reset assembly, and the third guide reset assembly all include a guide rod and a first spring sleeved on the outer wall of the guide rod, and a limit block is fixedly connected to the free end of the guide rod.

[0013] Preferably, the surface of the fixed frame is provided with multiple grooves, the second bending module is located in the corresponding groove, and a guide rail is fixedly connected in each groove, and the second bending module is slidably connected to the corresponding guide rail.

[0014] Preferably, the bending edge is an independent insert that is detachably fixed to the surface of the second bending module.

[0015] Preferably, the bottom of the connecting plate is symmetrically fixedly connected with a sleeve, and the surface of the lower template is symmetrically fixedly connected with a positioning rod. The positioning rod is coaxial with the corresponding sleeve, and the outer diameter of the positioning rod is the same as the inner diameter of the sleeve.

[0016] By adopting the aforementioned technical solution, the beneficial effects of the present invention are: 1. By integrating the three key processes of vertical bending on all four sides, box-shaped shaping, and inward rolling of the upper side edges into a single continuous stamping stroke through the wedge mechanism of the central forming block and the first bending module, and the drive block and the drive mechanism of the second bending module, the process is achieved. During the entire process, a vertical downward movement of the upper die assembly is precisely and sequentially decomposed into three consecutive sub-movements. This highly integrated and automated processing mode completely eliminates the time for workpiece transfer, positioning, and clamping between different workstations, compressing multiple processes into a single stroke and significantly shortening the processing cycle. At the same time, all bending angles and edge rolling dimensions are guaranteed by the precision and motion trajectory of the die itself, minimizing human intervention and ensuring that each produced box has extremely high consistency and repeatability. This makes it particularly suitable for manufacturing products such as power distribution cabinets that require mass production and stable quality.

[0017] 2. Guided by the arc-shaped guide structure, the first bending module applies a smooth, gradual bending force to the side of the sheet metal, rather than an instantaneous sharp-angle bend. This facilitates more uniform material flow, reduces local stress concentration and springback effect. More importantly, during the final side roll, the upper end of the sheet metal side is constrained in the closed cavity formed by the forming groove of the first bending module and the bending edge of the second bending module. This in-mold encapsulation bending method ensures that the deformation of the material under lateral pressure is effectively guided and supported by the precision mold surface, avoiding disordered material flow or local wrinkling. This not only ensures the accuracy and sharpness of the rolled edge shape, but also significantly reduces wear caused by severe friction or impact between the material and the mold.

[0018] 3. The bending device for processing distribution cabinet sheet metal is essentially a composite mold that can be installed on a standard, universal hydraulic press or mechanical press. Users do not need to invest in new, expensive specialized equipment. They only need to modify their existing stamping equipment or add a new mold to obtain the ability to produce high-quality distribution cabinet boxes, which greatly reduces the equipment investment threshold. In addition, the device integrates functions through modular design, condensing the work that originally required multiple production lines or multiple clamping operations into one workstation of one machine, which significantly saves the floor space of the production site and simplifies the material flow path. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0020] Figure 1 This is a schematic diagram of the bending device for processing power distribution cabinet sheet metal in one embodiment; Figure 2 This is a schematic diagram of the upper mold component structure in one embodiment; Figure 3 This is a schematic diagram of the drive unit structure in one embodiment; Figure 4 This is a schematic diagram of the central forming block and the first bending module in one embodiment; Figure 5 This is a schematic diagram of the structure of the first bending module in one embodiment; Figure 6 This is a schematic diagram of the central molding block structure in one embodiment; Figure 7 This is a schematic diagram of the lower mold component structure in one embodiment; Figure 8 This is a schematic diagram of the support platform and elastic reset component structure in one embodiment; Figure 9 This is a schematic diagram of a fixed frame structure in one embodiment; Figure 10 This is a schematic diagram of the second bending module structure in one embodiment; Figure 11 This is a schematic diagram of the lower mold component structure in one embodiment; Figure 12 This is a schematic diagram of the structure of the power distribution cabinet plate to be processed and the structure after processing in one embodiment.

[0021] Figure label: 100. Upper mold assembly; 110. Drive unit; 111. Upper template; 112. Connecting plate; 113. First guide reset assembly; 114. Limiting groove; 120. Center forming block; 121. First inclined surface; 122. Slide groove; 130. First bending module; 131. Second inclined surface; 132. Corner module; 133. Side module; 134. First slider; 140. Second guide reset assembly; 141. Guide rod; 142. First spring; 143. Limiting block; 150. Sleeve Pipe; 160, forming groove; 200, lower mold assembly; 210, lower template; 220, elastic reset component; 230, support platform; 240, fixed frame; 250, guide structure; 260, positioning rod; 270, positioning column; 300, lateral bending mechanism; 310, driving block; 311, driving surface; 320, second bending module; 321, pressure surface; 330, upright plate; 340, third guide reset assembly; 350, groove; 360, guide rail; 370, bending edge. Detailed Implementation

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0026] like Figures 1-12 As shown, a bending device for processing power distribution cabinet sheet metal includes an upper mold assembly 100, a lower mold assembly 200, and a lateral bending mechanism 300.

[0027] Please refer to Figure 2 The upper mold assembly 100 includes a drive unit 110 and a central forming block 120 connected below the drive unit 110. The periphery of the central forming block 120 is provided with a plurality of first bending modules 130 that can slide radially relative to the central forming block 120. The outer wall of the first bending module 130 has a forming groove 160.

[0028] For details, please refer to Figure 2 andFigure 3 The drive unit 110 includes an upper template 111 and a connecting plate 112 connected to the bottom of the upper template 111 via a first guide reset assembly 113, with a central forming block 120 fixed to the bottom of the connecting plate 112.

[0029] The first guide reset component 113 ensures the precise guidance and automatic reset of the connecting plate 112 relative to the upper template 111, improving the stability and reliability of the movement of the upper mold assembly 100. The drive block 310 is fixed on the upper template 111 and extends out of the connecting plate 112, so that the movement of the drive block 310 is synchronized with the downward pressing action of the upper mold assembly 100, accurately controlling the timing of the lateral bending mechanism 300 and avoiding interference.

[0030] It should be noted that, please refer to Figure 4 and Figure 5 The first bending module 130 includes corner modules 132 and side modules 133, with four corner modules 132 and four side modules 133. The corner modules 132 are located at the four corners of the central forming block 120, and the side modules 133 are located between adjacent corner modules 132. All the corner modules 132 and side modules 133 are combined to form a rectangular forming area. In the initial state, the area of ​​the rectangular forming area is smaller than the area of ​​the box to be formed from the power distribution cabinet plate. As the upper mold assembly 100 continuously presses down, the area of ​​the rectangular forming area gradually increases. When the bottom of the central forming block 120 contacts the power distribution cabinet plate, the area of ​​the rectangular forming area is at its maximum, and at this time, the area of ​​the rectangular forming area is the same as the inner surface area of ​​the box to be formed from the power distribution cabinet plate.

[0031] For details, please refer to Figure 5 and Figure 6 The outer wall of the central forming block 120 has multiple first inclined surfaces 121, the side wall of the first bending module 130 has a second inclined surface 131 that cooperates with the corresponding first inclined surface 121, and a second guide reset assembly 140 is provided between the first bending module 130 and the connecting plate 112.

[0032] It should be noted that a groove 122 is provided on the first inclined surface 121, and a first slider 134 is fixedly connected to the second inclined surface 131. The first slider 134 is slidably connected in the corresponding groove 122.

[0033] The cooperation of the first inclined surface 121 and the second inclined surface 131 converts the vertical movement of the central forming block 120 into the radial horizontal movement of the first bending module 130, resulting in high transmission efficiency and a simple and compact structure. The second guide reset component 140 ensures that the first bending module 130 automatically resets after bending, improving the repeatability and safety of the device and reducing the failure rate.

[0034] Please refer to Figure 7 andFigure 8 The lower mold assembly 200 includes a lower mold plate 210, a support platform 230 connected to the surface of the lower mold plate 210 by an elastic reset member 220, and a fixed frame 240 surrounding the support platform 230. The inner side of the fixed frame 240 is provided with a guide structure 250 corresponding to the first bending module 130.

[0035] Among them, the elastic reset component 220 is a nitrogen spring, and in order to facilitate the initial positioning of the distribution cabinet plate, multiple positioning posts 270 are fixedly connected to the surface of the fixed frame 240.

[0036] It should be noted that, please refer to Figure 9 The guide structure 250 has an arc-shaped guide surface, which can provide a smooth guide for the power distribution cabinet plate, reduce friction and impact during the sliding process, make the bending movement more stable, extend the service life of the mold, and prevent the plate from being scratched.

[0037] Through the radial sliding design of the central forming block 120 of the upper die assembly 100 and the first bending module 130, the first bending module 130 expands radially outward under the drive of the drive unit 110, interacting with the guide structure 250 of the lower die assembly 200 to achieve synchronous upward bending of the four sides of the sheet metal, thereby improving bending efficiency and consistency.

[0038] Please refer to Figure 3 , Figure 7 as well as Figure 10 The lateral bending mechanism 300 includes a drive block 310 fixed on the drive unit 110 and a second bending module 320 slidably disposed on the fixed frame 240. The side of the second bending module 320 near the support platform 230 has a bending edge 370. One end of the drive block 310 is fixed to the bottom of the upper template 111, and the other end of the drive block 310 extends out of the connecting plate 112.

[0039] When the upper mold assembly 100 moves downward, the first bending module 130 expands radially outward under the drive of the central forming block 120 and interacts with the guide structure 250 to bend the four sides of the sheet upward. The upper mold assembly 100 continues to move downward, and the driving block 310 drives the second bending module 320 to move horizontally toward the sheet, and simultaneously bends the upper end of the side of the sheet in the forming groove 160 from the side through the bending edge 370.

[0040] It should be noted that, please refer to Figure 3 and Figure 7The drive block 310 has an inclined drive surface 311, and the second bending module 320 has a pressure surface 321 that cooperates with the drive surface 311. The contact between the inclined drive surface 311 and the pressure surface 321 converts the vertical movement of the upper mold assembly 100 into the horizontal movement of the second bending module 320, realizing linear drive for lateral bending. The movement conversion is smooth and reduces energy loss.

[0041] Since the bending edge 370 is the part that directly contacts the power distribution cabinet plate during the bending process, is under concentrated stress, and suffers the most severe wear, the bending edge 370 is a separate insert that is detachably fixed to the surface of the second bending module 320 by bolts. With the adoption of the independent insert structure, it is only necessary to remove the worn or damaged insert from the second bending module 320 and replace it with a new pre-processed insert. This greatly simplifies the maintenance process, shortens the equipment downtime, reduces maintenance costs, and enables rapid mold repair.

[0042] For details, please refer to Figure 7 and Figure 9 The surface of the fixed frame 240 has multiple grooves 350, and the second bending module 320 is located in the corresponding groove 350. Each groove 350 is fixedly connected to a guide rail 360, and the second bending module 320 is slidably connected to the corresponding guide rail 360.

[0043] The groove 350 provides a space for the second bending module 320, and the guide rail 360 ensures that the second bending module 320 slides smoothly with low friction, improves motion accuracy, and extends the life of the slider.

[0044] The drive block 310 of the lateral bending mechanism 300, in cooperation with the second bending module 320, drives the second bending module 320 to move horizontally as the upper mold assembly 100 continues to move downward. Through the bending edge 370, the upper end of the side of the sheet metal is laterally bent in the forming groove 160, realizing multi-angle one-time forming, reducing the number of processes, and improving bending accuracy and forming quality.

[0045] For details, please refer to Figure 11 Multiple vertical plates 330 are fixedly connected to the surface of the lower template 210. Each vertical plate 330 corresponds to a second bending module 320. A third guide reset component 340 is provided between the second bending module 320 and the corresponding vertical plate 330.

[0046] The upright plate 330 provides a stable support base for the second bending module 320, and the third guide reset component 340 ensures that the second bending module 320 slides accurately and resets automatically in the horizontal direction, improving the accuracy and consistency of lateral bending.

[0047] Please refer to Figure 3 , Figure 4 as well as Figure 10The first guide reset assembly 113, the second guide reset assembly 140 and the third guide reset assembly 340 all include a guide rod 141 and a first spring 142 sleeved on the outer wall of the guide rod 141. The free end of the guide rod 141 is fixedly connected to a limit block 143.

[0048] The guide rod 141 provides linear guidance, the first spring 142 provides reliable restoring force, and the limit block 143 prevents the components from coming off, thus enhancing the stability and safety of the overall device.

[0049] For details, please refer to Figure 3 One end of the guide rod 141 on the first guide reset assembly 113 is fixed to the bottom of the upper template 111, and the other end of the guide rod 141 extends out of the connecting plate 112. The first spring 142 is fixed between the upper template 111 and the connecting plate 112. Please refer to... Figure 2 and Figure 4 One end of the guide rod 141 on the second guide reset assembly 140 is fixed to the upper end of the first bending module 130, and the other end of the guide rod 141 extends out of the connecting plate 112. The first spring 142 is fixed between the first bending module 130 and the connecting plate 112; please refer to Figure 10 and Figure 11 One end of the guide rod 141 on the third guide reset assembly 340 is fixed on the second bending module 320, and the other end of the guide rod 141 extends out of the upright plate 330. The first spring 142 is fixed between the upright plate 330 and the limiting block 143.

[0050] Guided by the arc-shaped guide structure 250, the first bending module 130 applies a smooth, gradual bending force to the side of the sheet metal, rather than an instantaneous sharp-angle bend. This facilitates more uniform material flow, reduces local stress concentration and springback effects, and, more importantly, during the final side folding, the upper end of the sheet metal's side is constrained within the closed cavity formed by the forming groove 160 of the first bending module 130 and the bending edge 370 of the second bending module 320. This in-mold encapsulation bending method ensures that the material is subjected to lateral compression. During this process, the deformation is effectively guided and supported by the precision mold surface, avoiding disordered material flow or local wrinkling. This not only ensures the accuracy and sharpness of the rolled edge shape, but also significantly reduces wear caused by severe friction or impact between the material and the mold. At the same time, the first spring 142 and guide rod 141 on the first guide reset assembly 113, the second guide reset assembly 140 and the third guide reset assembly 340 play a buffering and reset role, further protecting the working parts of the mold, thereby improving the overall stability and service life of the device.

[0051] It should be noted that, please refer to Figure 3A limiting groove 114 is provided on the connecting plate 112, and the guide rod 141 on the second guide reset assembly 140 is slidably connected in the limiting groove 114, so that the first bending module 130 can move radially horizontally in the center forming block 120.

[0052] In addition, please refer to Figure 1 The bottom of the connecting plate 112 is symmetrically fixedly connected with a sleeve 150, and the surface of the lower template 210 is symmetrically fixedly connected with a positioning rod 260. The positioning rod 260 is coaxial with the corresponding sleeve 150, and the outer diameter of the positioning rod 260 is the same as the inner diameter of the sleeve 150.

[0053] When the upper mold assembly 100 and the lower mold assembly 200 are closed, the positioning rod 260 is inserted into the sleeve 150 to achieve precise positioning, prevent misalignment, ensure bending accuracy, and enhance the rigidity and stability of the overall structure.

[0054] The specific working process of the bending device used for processing the power distribution cabinet sheet metal is as follows: Phase 1: Initial Positioning (Before Upper Mold Component 100 Descends) The flattened distribution cabinet panels after cutting (please refer to...) Figure 12 (As shown in the upper figure) is placed on the support platform 230 of the lower mold assembly 200 and is initially circumferentially positioned by the positioning column 270.

[0055] At this time, the upper mold assembly 100 is in the upper position, the first bending module 130 is in the retracted state under the action of the first spring 142 of the second guide reset assembly 140, the second bending module 320 of the lateral bending mechanism 300 is in the initial position away from the sheet metal under the action of the first spring 142 of the third guide reset assembly 340, and the support platform 230 is in the highest position under the support of the elastic reset member 220.

[0056] Phase Two: (Initial Pressing Down of Upper Mold Component 100) The drive unit 110 drives the entire upper mold assembly 100 to move downward.

[0057] Contact with sheet metal: First, the bottom of the first bending module 130 contacts and presses the sheet metal on the support platform 230.

[0058] Radial expansion: The drive unit 110 continues to press down, and the connecting plate 112 moves downward relative to the first bending module 130, causing the central forming block 120 to move downward together with the connecting plate 112. Due to the wedge action of the first inclined surface 121 and the second inclined surface 131, the first bending module 130 is forced to slide radially outward.

[0059] Phase 3: Box-shaped shaping and drive preparation (upper mold assembly 100 continues to press down) Overall downward pressure: When the bottom surface of the central forming block 120 begins to contact the center of the sheet metal surface, the upper mold assembly 100 overcomes the force of the elastic reset member 220 of the lower mold assembly 200 and moves downward as a whole.

[0060] Box forming: As the upper mold assembly 100 and the support platform 230 are pressed down together, the elastic reset member 220 is compressed, and the bottom surface of the sheet metal of the distribution cabinet box to be formed is pressed between the central forming block 120 and the support platform 230. Under the action of the forming surface on the outside of the first bending module 130 and the guide structure 250 on the inside of the fixed frame 240, the four sides of the sheet metal of the distribution cabinet box to be formed bend upward along the outer wall of the first bending module 130. At this time, the four sides of the sheet metal of the distribution cabinet box to be formed are located between the outer wall of the first bending module 130 and the inner wall of the fixed frame 240, and finally pressed into a regular box shape.

[0061] Drive block 310 in place: During this process, the drive block 310 fixed on the upper template 111 also descends and gradually approaches the pressure surface 321 of the second bending module 320.

[0062] Phase 4: Side inward folding (final stroke of upper mold assembly 100) The final stroke of the upper mold assembly 100 before it reaches the bottom dead center.

[0063] Triggering lateral bending: The driving surface 311 of the driving block 310 contacts the pressure surface 321 of the second bending module 320. Since the driving surface 311 is inclined, the vertical motion of continuing to press down is converted into the horizontal inward motion of the second bending module 320.

[0064] Precision bending: The second bending module 320 slides horizontally along the guide rail 360, and its top bending edge 370 is precisely inserted into the gap formed by the upper end of the side of the box-shaped sheet and the forming groove 160 on the outer wall of the first bending module 130.

[0065] One-time molding: The bending edge 370° acts as a force point, and the forming groove 160° acts as a mold. Together, they fold the upper end of the box-shaped side inward to form the required rolled edge structure, and finally press it into a box shape with a rolled edge structure (please refer to...). Figure 12 (As shown in the figure below).

[0066] Phase 5: Demolding and Repositioning The drive unit 110 drives the upper mold assembly 100 to return upwards.

[0067] As the upper mold assembly 100 rises, the drive block 310 first disengages from the second bending module 320. Under the action of the first spring 142 of the third guide reset assembly 340, the second bending module 320 moves horizontally outward, disengaging from the formed box. As the upper mold assembly 100 continues to rise, the wedge action between the central forming block 120 and the first bending module 130 is released. Under the action of the first spring 142 of the second guide reset assembly 140, the first bending module 130 retracts radially inward, disengaging from the side wall of the box. After the upper mold assembly 100 is completely disengaged, the elastic reset member 220 of the lower mold assembly 200 springs back, lifting the support platform 230 and the formed box-shaped distribution cabinet housing on it to the initial height for easy removal of the parts.

[0068] The bending device for processing the power distribution cabinet sheet metal integrates three key processes—vertical bending of four sides, box-shaped shaping, and inward rolling of the upper side edges—into a single continuous stamping stroke through the wedge mechanism of the central forming block 120 and the first bending module 130, and the drive mechanism of the drive block 310 and the second bending module 320. Throughout the process, a vertical downward movement of the upper die assembly 100 is precisely and sequentially decomposed into three consecutive sub-movements: first, the expanding first bending module 130 completes the standing of the four sides; then, the central forming block 120 and the support platform 230 jointly complete the... The box is pressed and shaped, and finally, the lateral bending mechanism 300 simultaneously completes the edge rolling at the end of the stroke. This highly integrated and automated processing mode completely eliminates the time for workpiece transfer, positioning and clamping between different workstations, compresses multiple processes into one stroke, and greatly shortens the processing cycle. At the same time, all bending angles and edge rolling dimensions are guaranteed by the precision and motion trajectory of the mold itself, minimizing human intervention and ensuring that each produced box has extremely high consistency and repeatability. It is particularly suitable for the manufacturing of products such as power distribution cabinets that require mass production and stable quality.

[0069] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A bending device for processing power distribution cabinet sheet metal, comprising an upper die assembly (100) and a lower die assembly (200), characterized in that: The upper mold assembly (100) includes a drive unit (110) and a central forming block (120) connected below the drive unit (110). The central forming block (120) has a plurality of first bending modules (130) that can slide radially relative to the central forming block (120) on its periphery. The outer wall of the first bending module (130) has a forming groove (160). The lower mold assembly (200) includes a lower mold plate (210), a support platform (230) connected to the surface of the lower mold plate (210) by an elastic reset member (220), and a fixed frame (240) surrounding the support platform (230). The inner side of the fixed frame (240) is provided with a guide structure (250) corresponding to the first bending module (130). It also includes a lateral bending mechanism (300), which includes a drive block (310) fixed on the drive unit (110) and a second bending module (320) slidably disposed on the fixed frame (240). The second bending module (320) has a bending edge (370) on the side near the support platform (230). When the upper mold assembly (100) moves downward, the first bending module (130) expands radially outward under the drive of the central forming block (120) and interacts with the guide structure (250) to bend the four sides of the sheet upward. The upper mold assembly (100) continues to move downward, and the driving block (310) drives the second bending module (320) to move horizontally toward the sheet, and simultaneously bends the upper end of the side of the sheet in the forming groove (160) from the side through the bending edge (370).

2. The bending device for processing power distribution cabinet sheet metal according to claim 1, characterized in that, The guide structure (250) is an arc-shaped guide surface.

3. A bending device for processing power distribution cabinet sheet metal according to claim 2, characterized in that, The driving unit (110) includes an upper template (111) and a connecting plate (112) connected to the bottom of the upper template (111) via a first guide reset assembly (113). The central forming block (120) is fixed to the bottom of the connecting plate (112). One end of the driving block (310) is fixed to the bottom of the upper template (111), and the other end of the driving block (310) extends out of the connecting plate (112).

4. A bending device for processing power distribution cabinet sheet metal according to claim 3, characterized in that, The outer wall of the central forming block (120) has a plurality of first inclined surfaces (121), the side wall of the first bending module (130) has a second inclined surface (131) that cooperates with the corresponding first inclined surface (121), and a second guide reset component (140) is provided between the first bending module (130) and the connecting plate (112).

5. A bending device for processing power distribution cabinet sheet metal according to claim 1, characterized in that, The drive block (310) has an inclined drive surface (311), and the second bending module (320) has a pressure surface (321) that cooperates with the drive surface (311).

6. A bending device for processing power distribution cabinet sheet metal according to claim 4, characterized in that, The surface of the lower template (210) is fixedly connected with multiple vertical plates (330), each vertical plate (330) corresponds to a second bending module (320), and a third guide reset component (340) is provided between the second bending module (320) and the corresponding vertical plate (330).

7. A bending device for processing power distribution cabinet sheet metal according to claim 6, characterized in that, The first guide reset assembly (113), the second guide reset assembly (140) and the third guide reset assembly (340) all include a guide rod (141) and a first spring (142) sleeved on the outer wall of the guide rod (141). The free end of the guide rod (141) is fixedly connected to a limit block (143).

8. A bending device for processing power distribution cabinet sheet metal according to claim 1, characterized in that, The surface of the fixed frame (240) is provided with a plurality of grooves (350), the second bending module (320) is located in the corresponding groove (350), and a guide rail (360) is fixedly connected in each groove (350), and the second bending module (320) is slidably connected to the corresponding guide rail (360).

9. A bending device for processing power distribution cabinet sheet metal according to claim 1, characterized in that, The bending edge (370) is an independent insert that is detachably fixed to the surface of the second bending module (320).

10. A bending device for processing power distribution cabinet sheet metal according to any one of claims 3, 4, and 6, characterized in that, The bottom of the connecting plate (112) is symmetrically fixedly connected with a sleeve (150), and the surface of the lower template (210) is symmetrically fixedly connected with a positioning rod (260). The positioning rod (260) is coaxial with the corresponding sleeve (150), and the outer diameter of the positioning rod (260) is the same as the inner diameter of the sleeve (150).

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