Plate bending machine

Abstract

The utility model relates to the technical field of workpiece bending, in particular to a plate bending machine which comprises a machine frame and two supporting plate sets, the supporting plate sets are fan-shaped assemblies, the two ends of each supporting plate set are fixedly connected with supporting shafts with the axes horizontally arranged, the supporting shafts are rotationally connected with the machine frame, the supporting shafts and the fan-shaped assemblies are coaxially arranged, and the fan-shaped assemblies are fixedly connected with the supporting shafts. The supporting plate set is provided with a supporting plane, the supporting plane can synchronously move along with a bent plate, a friction mechanism is arranged between the supporting plate set and the rack, and the friction mechanism can form sliding friction force on rotation of the supporting plate set around the axis of the supporting shaft. The device can solve the problem that when a traditional bending structure treats a thin plate or a large-span plate, due to insufficient supporting, the middle portion droops and deforms to a certain degree, the supporting plane can adjust the angle in a self-adaptive mode along with the deformation curve of the plate, lower supporting is continuously provided, and therefore the bending angle is more uniform, the shape of a bending line is more regular, and the bending quality is improved. And the bending quality and consistency are improved.

Description

Technical Field

[0001] This utility model relates to the field of workpiece bending technology, and in particular to a sheet metal bending machine. Background Technology

[0002] Sheet metal bending equipment is a key piece of equipment in sheet metal forming and processing, widely used in sheet metal manufacturing, automotive, home appliance, electrical control cabinet, and aerospace industries. Traditional sheet metal bending machines typically employ a three-point bending structure: the lower die has two fixed support points, and the upper die has a central punch. When the upper die moves downward, the sheet metal undergoes plastic deformation between the two lower support points, forming the desired bend angle.

[0003] like Figure 1 As shown, when the sheet material being processed is thin or the spacing between support points is large, the unsupported portion of the bending area will have a significant overhang. During the bending process, this overhanging area is prone to significant deformation, resulting in uneven bending angles or crooked bends, thus affecting the quality of the finished product. Utility Model Content

[0004] The purpose of this utility model is to solve one of the problems pointed out in the background art, and to propose a sheet metal bending machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sheet metal bending machine includes a frame and two sets of support plate assemblies. Each support plate assembly is a fan-shaped component. Support shafts with horizontally arranged axes are fixed to both ends of each support plate assembly. The support shafts are rotatably connected to the frame and are coaxial with the fan-shaped components. Each support plate assembly has a support plane that can move synchronously with the sheet metal being bent. A friction mechanism is provided between the support plate assembly and the frame, which can generate sliding friction force on the rotation of the support plate assembly around the axis of the support shaft.

[0007] The beneficial effects of the sheet metal bending machine proposed in this utility model are as follows: This utility model can solve to a certain extent the problem of sagging and deformation in the middle due to insufficient support when the traditional bending structure is used to process thin plates or large-span plates. The support plane can adaptively adjust the angle according to the deformation curve of the plate and continuously provide support from below, thereby making the bending angle more uniform, the bending line shape more regular, and improving the bending quality and consistency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a traditional bending machine;

[0009] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0010] Figure 3 This is a schematic diagram of the initial state structure of this utility model;

[0011] Figure 4 This is a schematic diagram of the structure of this utility model in a bent state.

[0012] In the diagram: 1. Support plate assembly; 2. Fan-shaped plate; 3. Connector; 4. Interlaced gap; 5. Support shaft; 6. Friction plate; 7. Guide plate; 8. Threaded shaft; 9. Rotary motor; 10. Frame; 11. Support plane. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figures 2-4 A sheet metal bending machine includes a frame 10 and two sets of support plate assemblies 1. Each support plate assembly 1 is a fan-shaped component. Support shafts 5 with horizontally arranged axes are fixed to both ends of the support plate assembly 1. The support shafts 5 are rotatably connected to the frame 10 and are coaxially arranged with the fan-shaped components. Each support plate assembly 1 has a support plane 11, which can move synchronously with the sheet metal being bent. A friction mechanism is provided between the support plate assembly 1 and the frame 10. The friction mechanism can generate sliding friction force on the rotation of the support plate assembly 1 around the axis of the support shaft 5.

[0015] When the upper die applies a bending force to the sheet metal, the sheet metal gradually deforms in the middle of its length direction. At this time, the support plane 11, because it is in contact with the sheet metal and can rotate around the support axis 5, can continuously conform to the deformation trajectory of the sheet metal, thereby achieving real-time dynamic support for the lower surface of the sheet metal.

[0016] A friction mechanism is provided between the support plate assembly 1 and the frame 10. This friction mechanism generates sliding friction when the support plate assembly 1 rotates around the support shaft 5, thereby providing a certain rotational damping to the support plane 11. This damping effect prevents the support plane 11 from swinging freely during the bending process of the sheet metal, and instead provides support in a controlled fit, further improving the stability during the bending process.

[0017] This invention can, to some extent, solve the problem of sagging and deformation in the middle caused by insufficient support when traditional bending structures are used to process thin plates or large-span plates. The support plane 11 can adaptively adjust its angle according to the deformation curve of the plate, continuously providing support from below, thereby making the bending angle more uniform, the bending line shape more regular, and improving the bending quality and consistency.

[0018] refer to Figures 2-4The support plate assembly 1 includes at least one sector plate 2, which is coaxially fixed to the support shaft 5. The radial cross-section of the sector plate 2 forms the support plane 11. The sector plate 2 forms an arc-shaped structure centered on the support shaft 5, and its radial cross-section, i.e., the support plane 11, is located at the outer edge of the sector outline, allowing it to make surface contact with the lower surface of the bent sheet material. During the bending process, the middle of the sheet material gradually deforms and forms a bending trajectory as the upper die presses down. At this time, the sector plate 2 slowly rotates around the support shaft 5, and the support plane 11 rotates accordingly, always remaining in contact with the lower surface of the sheet material. Due to the geometric characteristics of the sector plate 2, its support plane 11 can still provide continuous and stable support when the bending angle of the sheet material changes, making it less prone to sagging deformation in the middle of the sheet material during the bending process.

[0019] The support plate group 1 includes at least two sector plates 2. Adjacent sector plates 2 are fixed together by connectors 3 and there is an interlaced gap 4 between adjacent sector plates 2. The sector plates 2 of the two support plate groups 1 are arranged in an interlaced manner. The sector plates 2 located at both ends of the support plate group 1 are fixed coaxially with the support shaft 5. The radial cross-section of multiple sector plates 2 is the support plane 11.

[0020] The composite support plate group 1, which is constructed by multiple fan-shaped plates 2, connectors 3 and staggered gaps 4, not only enhances the adaptability of the bending machine to large-format plates, but also improves the uniformity of stress and support stability of the plates during the bending process.

[0021] The friction mechanism includes a guide plate 7 fixedly connected to the frame 10. Several friction plates 6 are slidably connected to the guide plate 7. Several friction plates 6 are threadedly connected to a threaded shaft 8. The threaded shaft 8 is rotatably connected to the frame 10. Rotating the threaded shaft 8 can change the friction force between the friction plates 6 and the sector plate 2.

[0022] The friction mechanism includes a guide plate 7 fixedly connected to the frame 10. Several friction plates 6 are slidably connected to the guide plate 7. These friction plates 6 contact the outer edge of the sector plate 2, generating friction as the sector plate 2 rotates around the support shaft 5. The friction plates 6 are threadedly connected to a threaded shaft 8. The threaded shaft 8 is rotatably connected to the frame 10. By manually or electrically rotating the threaded shaft 8, the friction plates 6 can be driven to move axially along the guide plate 7, thereby adjusting the contact pressure between the friction plates 6 and the sector plate 2, and thus changing the magnitude of the frictional force between them.

[0023] In actual operation, the sector plate 2 is attached to the bent sheet material via the supporting plane 11 and rotates synchronously with the deformation trajectory of the sheet material. By adjusting the threaded shaft 8, the friction plate 6 applies appropriate frictional resistance to the sector plate 2, thereby creating a controlled sliding restriction on its rotation. This frictional resistance prevents the sector plate 2 from swinging freely without control, maintains stable contact with the supporting plane 11 during the sheet material deformation process, and improves the controllability and consistency of the support effect.

[0024] The frame 10 is equipped with a rotary motor 9, and the power output shaft of the rotary motor 9 is connected to the threaded shaft 8. The rotary motor 9 drives the threaded shaft 8 to rotate, thereby realizing the automatic adjustment of the position of the friction plate 6, and thus controlling the friction force between the friction plate 6 and the sector plate 2.

[0025] When friction plates 6 are respectively arranged on both sides of the sector plate 2, each pair of friction plates 6 located at both ends of the same threaded shaft 8 are connected in opposite helical directions. With this structural arrangement, when the threaded shaft 8 rotates in one direction, each pair of friction plates 6 can achieve back-to-back movement or front-to-back movement.

[0026] When the threaded shaft 8 rotates, causing the two friction plates 6 to move towards each other, the friction plates 6 will simultaneously clamp onto the sector plate 2, increasing the contact pressure with the sector plate 2 and thus enhancing the friction. When the friction plates 6 move away from each other, the two friction plates 6 will simultaneously move away from the sector plate 2, reducing the contact pressure and decreasing the friction.

[0027] The bending machine includes a torsion spring, which is sleeved on the support shaft 5. One end of the torsion spring is fixed to the frame 10, and the other end is fixed to the support plate assembly 1. The torsion spring enables the support plate assembly 1 to return to its initial position. The torsion spring applies a rotational force to the support plate assembly 1. When the support plate assembly 1 rotates around the support shaft 5 due to sheet metal deformation, the torsion spring releases its stored energy after the external force is released or the bending is completed, automatically returning the support plate assembly 1 to its initial position.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate bending machine characterized by, The assembly includes a frame (10) and two sets of support plate assemblies (1). Each support plate assembly (1) is a fan-shaped component. Both ends of the support plate assembly (1) are fixed with a horizontally arranged support shaft (5). The support shaft (5) is rotatably connected to the frame (10). The support shaft (5) is coaxially arranged with the fan-shaped component. The support plate assembly (1) has a support plane (11). The support plane (11) can move synchronously with the bent sheet material. A friction mechanism is provided between the support plate assembly (1) and the frame (10). The friction mechanism can generate sliding friction force on the rotation of the support plate assembly (1) around the axis of the support shaft (5).

2. A plate bending machine according to claim 1, characterized in that The support plate assembly (1) includes at least one sector plate (2), which is coaxially fixed with the support shaft (5), and the radial section of the sector plate (2) is the support plane (11).

3. A plate bending machine according to claim 2, characterised in that The support plate group (1) includes at least two sector plates (2), adjacent sector plates (2) are fixed together by connectors (3) and there is an interlaced gap (4) between adjacent sector plates (2), the sector plates (2) of the two support plate groups (1) are arranged in an interlaced manner, the sector plates (2) located at both ends of the support plate group (1) are fixed coaxially with the support shaft (5), and the radial cross-section of the plurality of sector plates (2) is the support plane (11).

4. A plate bending machine according to claim 2 or 3, characterised in that, The friction mechanism includes a guide plate (7) fixedly connected to the frame (10), a plurality of friction plates (6) are slidably connected on the guide plate (7), and a threaded shaft (8) is threadedly connected to the plurality of friction plates (6). The threaded shaft (8) is rotatably connected to the frame (10). Rotating the threaded shaft (8) can change the friction force between the friction plates (6) and the sector plate (2).

5. A plate bending machine according to claim 4, characterised in that The frame (10) is equipped with a rotary motor (9), and the power output shaft of the rotary motor (9) is connected to the threaded shaft (8) for transmission.

6. A plate bending machine according to any of claims 1-3, 5, characterized in that The bending machine includes a torsion spring, which is sleeved on the support shaft (5). One end of the torsion spring is fixed to the frame (10) and the other end is fixed to the support plate assembly (1). The torsion spring can reset the support plate assembly (1).

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