A multi-point bending machine for sheet metal cabinet body

Abstract

This disclosure relates to the technical field of chassis processing. One embodiment of this disclosure provides a multi-point bending machine for sheet metal chassis, comprising: an equipment frame and a center table. The center table is fixed to the surface of the equipment frame. A double-sided bending assembly is disposed between the equipment frame and the center table. A multi-sided bending assembly is disposed on the equipment frame and includes several movable seats. The movable seats are connected to the four opposite sides of the surface of the equipment frame via a horizontal linear drive. Each end of the movable seat surface is provided with a bracket. A bending frame is rotatably connected between the brackets via a rotating shaft. The bending frame has a U-shaped cross-section. This technical solution solves the problem in the prior art where traditional sheet metal chassis bending relies heavily on single-station bending machines, resulting in low efficiency due to the ability to bend only one side at a time.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of chassis processing, specifically to a multi-point bending machine for sheet metal chassis. Background Technology

[0002] In sheet metal chassis production, bending is a core process for shaping the side panels, top panels, and door panels. Multiple bends are required to form the chassis's edges and closed structure, and its processing efficiency and precision directly determine the chassis's assembly compatibility and appearance quality. With the increasing integration of electronic equipment, sheet metal chassis structures are becoming increasingly complex. A single chassis often requires bending multiple sides, and the consistency of bending angles across all sides is critical. However, traditional sheet metal chassis bending relies heavily on single-station bending machines, which have the significant drawback of bending only one side at a time, severely restricting production efficiency and product qualification rates. Traditional bending machines operate on a single-bending model. After bending each side, the machine must be stopped and the sheet metal parts manually adjusted and the bending reference recalibrated before processing the next side. The bending process for a single enclosure requires repeated positioning and bending operations, making it unsuitable for mass production. Furthermore, frequent manual intervention can lead to inconsistent bending angles due to positioning deviations, resulting in issues such as misaligned edges and loose seams during enclosure assembly.

[0003] Therefore, the development of a multi-point bending machine capable of simultaneous or continuous bending on multiple sides has become an urgent need to solve the problems of low bending efficiency and poor precision in sheet metal chassis. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a multi-point bending machine for sheet metal chassis, which solves the technical problem that the bending of traditional sheet metal chassis in the prior art mostly relies on single-station bending machines, which can only bend one edge at a time, resulting in low efficiency.

[0005] According to one aspect, at least one embodiment of this disclosure provides a multi-point bending machine for sheet metal chassis housings, comprising: The equipment rack and the central platform, wherein the central platform is fixed to the surface of the equipment rack; A double-sided folding assembly is disposed between the equipment rack and the central platform; A polygonal bending assembly, wherein the polygonal bending assembly is mounted on the equipment frame; The polygonal bending assembly includes several movable seats, which are connected to the four opposite sides of the equipment frame surface by a horizontal linear drive. Each movable seat has a support at both ends, and the supports are rotatably connected to a bending frame via a rotating shaft. The bending frame has a U-shaped cross-section.

[0006] As a further technical solution, the equipment frame has notches on all four sides, and the bottom of the movable seat is equipped with a telescopic cylinder. The telescopic cylinder is located in the notch, the output end of the telescopic cylinder is equipped with a straight rack, and the surface of the movable seat is equipped with a transmission gear.

[0007] As a further technical solution, the transmission gear meshes with the straight plate rack, and an arc-shaped rack is provided on the outer end face of the bending frame. The arc-shaped rack is centered on the rotation axis of the bending frame, and meshes with the transmission gear.

[0008] According to another aspect, in at least one embodiment of the present invention, the double-sided folding assembly includes a pair of bending plates, the bending plates being rotatably connected to both sides of the central platform via pins, and a rectangular opening is provided on the surface of the equipment frame.

[0009] As a further technical solution, connecting frames are provided at both ends of the bottom of the equipment frame. A second cylinder is rotatably connected to one end of the connecting frame and the bottom of the bending plate through a pin. The second cylinder is located inside the rectangular opening.

[0010] As a further technical solution, a pair of portal frames are provided on the top of the equipment frame, and a third cylinder is provided vertically downward on the top of each portal frame. A clamping bar is provided at the output end of the third cylinder, and the clamping bar is located at the two edges of the central platform.

[0011] As a further technical solution, the maximum rotation angle of both the bending frame and the bending plate is greater than 90°.

[0012] As a further technical solution, the surface of the central platform and the inner bottom surface of the bending frame are located on the same plane.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, a multi-sided bending assembly solves the problem of low efficiency in traditional single-station bending by employing a synchronous bending design for both sides. A horizontal linear drive precisely moves the moving seat close to the center table, and the U-shaped structure of the bending frame adapts to the bending requirements of sheet metal. A telescopic cylinder, a straight rack and pinion, and transmission gears work together to drive the bending frame to rotate stably, achieving synchronous bending of both sides. This structure eliminates the need for individual processing of each side, reducing downtime for adjustments, while ensuring consistent bending angles on opposite sides, avoiding manual positioning errors, improving the bending accuracy and consistency of the four sides of the housing, adapting to batch production needs, and significantly shortening the bending cycle of a single housing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Equipment frame; 2. Center platform; 3. Polygonal bending assembly; 3-1. Moving seat; 3-2. Support; 3-3. Bending frame; 3-4. Notch; 3-5. Telescopic cylinder; 3-6. Straight plate rack; 3-7. Transmission gear; 3-8. Arc rack; 4. Double-sided folding assembly; 4-1. Bending plate; 4-2. Rectangular opening; 4-3. Connecting frame; 4-4. Second cylinder; 4-5. Gantry frame; 4-6. Third cylinder; 4-7. Pressing strip. Detailed Implementation

[0016] The present disclosure 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 disclosure and are not intended to limit the scope of the disclosure.

[0017] 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."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" 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 disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly 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.

[0020] 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 disclosure.

[0021] 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.

[0022] like Figures 1-3 As shown, it illustrates a multi-point bending machine for sheet metal chassis housings according to an embodiment of this disclosure, comprising: The equipment frame 1 and the center platform 2 are fixed to the surface of the equipment frame 1; A double-sided folding component 4 is disposed between the equipment frame 1 and the central platform 2; A polygonal bending assembly 3 is disposed on the equipment frame 1; The polygonal bending assembly 3 includes several movable seats 3-1. The movable seats 3-1 are connected to the four opposite sides of the surface of the equipment frame 1 via a horizontal linear drive. Each movable seat 3-1 has a support 3-2 at both ends. A bending frame 3-3 is rotatably connected to the supports 3-2 via a rotating shaft. The bending frame 3-3 has a U-shaped cross-section. Each of the four opposite sides of the surface of the equipment frame 1 has a notch 3-4. A telescopic cylinder 3- is located at the bottom of each movable seat 3-1. 5. The telescopic cylinder 3-5 is located inside the notch 3-4. The output end of the telescopic cylinder 3-5 is provided with a straight rack 3-6. The surface of the moving seat 3-1 is provided with a transmission gear 3-7. The transmission gear 3-7 meshes with the straight rack 3-6. The outer end face of the bending frame 3-3 is provided with an arc-shaped rack 3-8. The arc-shaped rack 3-8 is centered on the rotation axis of the bending frame 3-3. The arc-shaped rack 3-8 meshes with the transmission gear 3-7.

[0023] In some examples, in order to achieve phased bending of the four sides of the sheet metal chassis, adapt to the bending requirements of multiple sides of the chassis, and ensure the accuracy of the bending angle of each side, a multi-sided bending component 3 is designed. This component includes movable seats 3-1 on the four sides of the surface of the equipment frame 1, which are connected by independent horizontal linear drive components (such as cylinders). The drive components are fixed to the side wall of the equipment frame 1 and can drive the corresponding movable seats 3-1 to move closer or further away from the central platform 2 along the surface of the equipment frame 1. The drive components of the movable seats 3-1 on the opposite sides are synchronously controlled to achieve synchronous bending operation of two opposite sides each time, thereby improving bending efficiency.

[0024] The supports 3-2 at both ends of the surface of the movable seat 3-1 are symmetrically distributed and fixed to the movable seat 3-1 by bolts. The two ends of the rotating shaft between the supports 3-2 are rotatably connected to the supports 3-2 by bearings, providing a rotation fulcrum for the bending frame 3-3. The cross-section of the bending frame 3-3 is U-shaped, and the curvature of its inner wall is adapted to the preset bending angle of the sheet metal. The middle part of the bending frame 3-3 is fixedly mounted on the rotating shaft and can rotate synchronously with the rotating shaft. The U-shaped opening faces the center platform 2, ensuring that the side of the sheet metal can smoothly enter the bending frame 3-3 to complete the bending.

[0025] The notches 3-4 on the four sides of the surface of the equipment frame 1 extend along the moving direction of the movable seat 3-1, providing space for the telescopic cylinder 3-5 at the bottom of the movable seat 3-1 to avoid interference between the cylinder and the equipment frame 1.

[0026] Telescopic cylinder 3-5 is vertically fixed to the bottom of movable seat 3-1, with its output end facing upward and fixedly connected to straight rack 3-6, which extends vertically. Transmission gear 3-7, which is rotatably connected to the surface of movable seat 3-1 via a shaft seat, meshes with straight rack 3-6 to form a vertical transmission structure. The arc-shaped rack 3-8 on the outer end face of bending frame 3-3 is distributed in an arc shape with the rotation axis as the center and meshes with transmission gear 3-7, which can convert the rotational motion of transmission gear 3-7 into the oscillating motion of bending frame 3-3.

[0027] During operation, when bending opposite sides is required, the corresponding horizontal linear drive components on both sides synchronously drive the moving seat 3-1 closer to the center platform 2, causing the sheet metal side to enter the U-shaped groove of the bending frame 3-3. The telescopic cylinder 3-5 activates, pushing the straight rack 3-6 upward, which in turn drives the transmission gear 3-7 to rotate. The transmission gear 3-7 further drives the arc-shaped rack 3-8 to swing, causing the bending frame 3-3 to rotate around its axis. The U-shaped groove then compresses the sheet metal side, completing the bending. After bending, the telescopic cylinder 3-5 resets, and the horizontal linear drive components retract the moving seat 3-1. The movement of the moving seats 3-1 on the other pair of sides is then repeated to complete the bending of all four sides. Through coordinated operation, all components achieve synchronous bending of opposite sides, ensuring the accuracy and consistency of the four-sided bending.

[0028] like Figures 1-3As shown in the figure, the double-sided folding assembly 4 in this embodiment includes a pair of bending plates 4-1. The bending plates 4-1 are rotatably connected to both sides of the central platform 2 by pins. A rectangular opening 4-2 is provided on the surface of the equipment frame 1. A connecting frame 4-3 is provided at both ends of the bottom of the equipment frame 1. A second cylinder 4-4 is rotatably connected between one end of the connecting frame 4-3 and the bottom of the bending plate 4-1 by a pin. The second cylinder 4-4 is located inside the rectangular opening 4-2. A pair of portal frames 4-5 are provided on the top of the equipment frame 1. A third cylinder 4-6 is vertically downward provided on the top of each portal frame 4-5. A pressing strip 4-7 is provided at the output end of the third cylinder 4-6. The pressing strip 4-7 is located at the two edges of the central platform 2.

[0029] In some examples, in order to achieve synchronous bending at both ends of the sheet metal chassis and quickly form a U-shaped structure to meet the initial forming requirements of the chassis, a double-sided folding component 4 was designed. The bending plates 4-1 on both sides of the central platform 2 of this component are rotatably connected to the side wall of the central platform 2 through horizontal pins. The pins are distributed along the length of the central platform 2 to ensure that the bending plates 4-1 can swing up or down around the pins. When the upper surface of the bending plate 4-1 is flush with the surface of the central platform 2, it can serve as a flat support surface for the sheet metal. When swinging, it can drive the side of the sheet metal to bend.

[0030] The rectangular openings 4-2 on the surface of the equipment frame 1 are located on both sides below the center platform 2, corresponding to the position of the bending plate 4-1, providing space for the extension and retraction of the second cylinder 4-4. The connecting brackets 4-3 at both ends of the bottom of the equipment frame 1 are fixed vertically downwards, and the other end is rotatably connected to the cylinder end of the second cylinder 4-4 through a pin. The output end of the second cylinder 4-4 is rotatably connected to the bottom of the bending plate 4-1 through a pin, forming a triangular transmission structure. When the second cylinder 4-4 extends and retracts, it can push the bending plate 4-1 to swing synchronously around the pin of the center platform 2, ensuring that the bending plates 4-1 on both sides move in unison.

[0031] A pair of portal frames 4-5 at the top of the equipment frame 1 span the center platform 2 and are fixed to the equipment frame 1 by bolts. The third cylinder 4-6 at the top of the portal frame 4-5 is vertically downward and its output end is fixedly connected to the clamping strip 4-7. The clamping strip 4-7 is horizontally set and located directly above the two edges of the center platform 2. The lower end of the clamping strip 4-7 can fit against the sheet metal surface to vertically clamp the sheet metal.

[0032] During operation, the sheet metal is placed on the upper surface of the center platform 2 and the bending plate 4-1. The third cylinder 4-6 is activated to drive the clamping strip 4-7 to descend, closely adhering to the sheet metal surface to prevent the sheet metal from shifting during bending. Subsequently, the second cylinders 4-4 on both sides extend and retract synchronously, pushing the bending plate 4-1 to swing upward around the pin axis of the center platform 2. The bending plate 4-1 drives the two ends of the sheet metal to bend upward until the bending angle on both sides meets the requirements of the U-shaped structure.

[0033] After bending, the second cylinder 4-4 resets, causing the bending plate 4-1 to fall back, and the third cylinder 4-6 drives the clamping strip 4-7 to rise, allowing the formed U-shaped sheet metal to be removed. The gantry frame 4-5 provides stable support for the third cylinder 4-6, the rectangular opening 4-2 prevents interference between the second cylinder 4-4 and the equipment frame 1, synchronous drive ensures consistent bending angles at both ends, and clamping and positioning ensure bending accuracy. All components work together to achieve synchronous bending of both ends into a U-shape, improving the initial forming efficiency of the box.

[0034] For example, such as Figure 3 As shown, the maximum rotation angle of both the bending frame 3-3 and the bending plate 4-1 is greater than 90°.

[0035] In some examples, the maximum rotation angle of both the bending frame 3-3 and the bending plate 4-1 is greater than 90°, which can meet the requirements of over-bending compensation and complex angle forming during the bending process of the sheet metal chassis.

[0036] Sheet metal materials possess elastic recovery characteristics. When the bending angle reaches 90°, the rebound angle is likely to be less than the preset angle. However, the maximum rotation angle greater than 90° can be offset by "over-bending," ensuring that the final bending angle is precisely 90°, which is suitable for the forming requirements of right-angled edges of the box. At the same time, for some special box structures that require obtuse angle bending, a rotation range greater than 90° can be achieved directly without replacing parts, improving the versatility of the equipment.

[0037] In addition, sufficient rotation allowance can also prevent parts from getting stuck due to angle limitations during bending, ensuring smooth bending action and further improving bending efficiency and quality.

[0038] For example, such as Figure 3 As shown, the surface of the central platform 2 and the inner bottom surface of the bending frame 3-3 are located on the same plane.

[0039] In some examples, the surface of the center platform 2 and the inner bottom surface of the bending frame 3-3 are on the same plane, which ensures that the sheet metal is placed on a flat surface without steps, and avoids deformation of the sheet metal due to uneven stress before bending.

[0040] When the moving seat 3-1 moves the bending frame 3-3 close to the center platform 2, the design of the same plane allows the side of the sheet metal to smoothly enter the U-shaped groove of the bending frame 3-3, so that the force of the bending frame 3-3 on the sheet metal is evenly distributed on the contact surface, preventing excessive local force from causing indentations or wrinkles on the sheet metal surface.

[0041] Meanwhile, the flat support surface also lays the foundation for precise control of the subsequent bending angle, ensuring that the sheet metal bending trajectory is stable when the bending frame rotates 3-3, avoiding bending angle deviation caused by the height difference of the support surface, and ensuring consistent bending accuracy on all sides of the box.

[0042] In practical use: The sheet metal chassis is placed on the bending plate 4-1 of the center platform 2 and the double-sided bending assembly 4, with both ends of the sheet metal resting on the surface of the bending plate 4-1. The third cylinder 4-6 is activated, driving the clamping strip 4-7 to descend and fit against the edge of the sheet metal, fixing the sheet metal to the surface of the center platform 2. Then, the second cylinder 4-4 pushes the bending plate 4-1 to rotate around the pin shaft through the connecting frame 4-3, causing the two sides of the sheet metal to bend upwards, forming a preliminary U-shaped structure. After bending, the bending plate 4-1 returns to its original position, and the clamping strip 4-7 rises. Next, the multi-sided bending assembly 3 is activated, and the horizontal linear drive moves the moving seats 3-1 on both sides closer to the center platform 2, so that the other two sides of the sheet metal enter the U-shaped groove of the bending frame 3-3. The telescopic cylinder 3-5 pushes the straight plate rack 3-6 upwards, and through the transmission gear 3-7 meshing with the arc-shaped rack 3-8, it drives the bending frame 3-3 to rotate around the rotation axis, completing the synchronous bending of opposite sides. Repeat the operation of the other pair of moving seats 3-1 to achieve bending of the four sides of the sheet metal. The sheet metal position does not need to be adjusted frequently throughout the process, and the sheet metal chassis is formed efficiently.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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 solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A multi-point bending machine for sheet metal chassis, characterized in that, include: Equipment frame (1) and center platform (2), wherein the center platform (2) is fixed to the surface of the equipment frame (1); A double-sided folding assembly (4) is disposed between the equipment rack (1) and the central platform (2); A polygonal bending assembly (3) is disposed on the equipment frame (1); The polygonal bending assembly (3) includes several movable seats (3-1). The movable seats (3-1) are connected to the four opposite sides of the surface of the equipment frame (1) by a horizontal linear drive. Each of the two ends of the surface of the movable seats (3-1) is provided with a bracket (3-2). The brackets (3-2) are rotatably connected to each other by a rotating shaft. The bending frame (3-3) has a U-shaped cross-section.

2. A multi-point bending machine for sheet metal chassis as described in claim 1, characterized in that, The equipment frame (1) has notches (3-4) on all four sides of its surface. The bottom of the movable seat (3-1) is provided with a telescopic cylinder (3-5). The telescopic cylinder (3-5) is located in the notch (3-4). The output end of the telescopic cylinder (3-5) is provided with a straight plate rack (3-6). The surface of the movable seat (3-1) is provided with a transmission gear (3-7).

3. A multi-point bending machine for sheet metal chassis as described in claim 2, characterized in that, The transmission gear (3-7) meshes with the straight rack (3-6), and an arc-shaped rack (3-8) is provided on the outer end face of the bending frame (3-3). The arc-shaped rack (3-8) is centered on the rotation axis of the bending frame (3-3), and meshes with the transmission gear (3-7).

4. A multi-point bending machine for sheet metal chassis as described in claim 1, characterized in that, The double-sided folding assembly (4) includes a pair of bending plates (4-1), which are rotatably connected to both sides of the central platform (2) by a pin, and a rectangular opening (4-2) is provided on the surface of the equipment frame (1).

5. A multi-point bending machine for sheet metal chassis as described in claim 4, characterized in that, The equipment frame (1) is provided with connecting frames (4-3) at both ends of the bottom. One end of the connecting frame (4-3) is rotatably connected to the bottom of the bending plate (4-1) by a pin shaft, and the second cylinder (4-4) is located inside the rectangular opening (4-2).

6. A multi-point bending machine for sheet metal chassis as described in claim 5, characterized in that, The equipment frame (1) is provided with a pair of portal frames (4-5) on the top. Each portal frame (4-5) is provided with a third cylinder (4-6) vertically downward on the top. The output end of the third cylinder (4-6) is provided with a pressing bar (4-7). The pressing bar (4-7) is located at the two edges of the central platform (2).

7. A multi-point bending machine for sheet metal chassis as described in claim 4, characterized in that, The maximum rotation angle of both the bending frame (3-3) and the bending plate (4-1) is greater than 90°.

8. A multi-point bending machine for sheet metal chassis as described in claim 1, characterized in that, The surface of the central platform (2) and the inner bottom surface of the bending frame (3-3) are located on the same plane.

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