Arc radius adjustable plate bending machine

Abstract

The utility model belongs to the technical field of bending machine, concretely is a kind of plate bending machine of bending radius adjustable, including base, the upper surface of base is provided with adjusting mechanism, for adjusting the bending radius when plate processing, the upper surface of base is provided with two arc grooves, the inside sliding installation of arc groove has moving column, the top fixed mounting of moving column has two L shape's stand, the top between two stand and moving column is rotatably installed with rotating column, the side sliding installation of base has the support of U shape, the inside fixed mounting of support has bending head, bending head is between two moving columns. Through arc groove, moving column, stand, rotating column and bending head etc. Setting, from the center of plate fixed, by the both ends of plate bending inward, so that plate bending, bending process by rotating column slowly bend plate, limit after bending plate, avoid plate rebound, effectively improve processing quality and processing efficiency.

Description

Technical Field

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

[0002] A bending machine, also known as a plate rolling machine, comes in various types depending on its application. A plate rolling machine is a device that uses work rollers to bend and shape sheet metal. It can form parts of different shapes, such as cylindrical and conical parts, making it a very important processing equipment. The working principle of a plate rolling machine is as follows: through the action of external forces such as hydraulic pressure and mechanical force, the work rollers move, thereby bending or rolling the sheet metal into shape. Depending on the rotation and position changes of the work rollers of different shapes, elliptical, arc-shaped, and cylindrical parts can be processed.

[0003] For example, patent application number CN202021400907.4 discloses a hardware bending device, relating to the field of bending devices. This utility model uses a clamping plate and a fixed upright plate to hold and fix the lower part of a sheet metal, using a support column as the bending support point. Through the extension and retraction of a second hydraulic cylinder, the sheet metal near the support column is pushed laterally, evenly bending the sheet metal without causing arc deformation of the sheet metal surface. The rolling column contacts and rolls against the sheet metal surface, preventing scratches during bending and minimizing damage to the sheet metal. A manual translation component allows adjustment of the position of the second hydraulic cylinder and the longitudinal distance between the rolling column and the support column to accommodate bending operations of sheet metal of different thicknesses. An adjustable baffle is suitable for changing different bending lengths, allowing bending of various specifications of hardware parts. An arc-shaped strip can be used to adjust the bending angle, enabling bending of various hardware parts of different specifications.

[0004] Existing technology uses adjustable baffles to accommodate different bending lengths and can bend various specifications of hardware parts, but it still has certain shortcomings in overall use: First, while the existing technology can adjust the bending angle of the sheet material, it cannot adjust the bending radius. This makes it unsuitable for various product types, requires frequent mold changes or equipment adjustments leading to downtime, and reduces work efficiency.

[0005] Secondly, after the sheet metal is bent using a bending machine, residual stress exists within the sheet metal. This residual stress is balanced by the contact force of the tool. When the force of the bending machine is removed, that is, when the sheet metal is unloaded from the bending machine, the sheet metal will seek a new equilibrium position, and the local residual stress is released. This causes the final angle of the product to deviate from the expected value, resulting in springback. Consequently, the sheet metal cannot meet the expected bending requirements, affecting the assembly accuracy of the product and reducing production efficiency. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the present invention solves the following technical problem: after the sheet metal is bent, a springback phenomenon will occur, resulting in the bending angle and radius of curvature not matching the dimensions, affecting the assembly accuracy of the product, increasing the adjustment and shaping correction work, and reducing production efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sheet metal bending machine with adjustable bending radius, comprising a base, an adjustment mechanism on the upper surface of the base for adjusting the bending radius during sheet metal processing, two arc-shaped grooves on the upper surface of the base, a movable column slidably installed inside the arc-shaped grooves, two L-shaped columns fixedly installed on the top of the movable columns, a rotating column rotatably installed between the top of the two columns and the movable columns, a U-shaped bracket slidably installed on one side of the base, a bending head fixedly installed inside the bracket, the bending head being located between the two movable columns.

[0008] Optionally, the adjustment mechanism includes two sliders that slide on the upper surface of the base, and a bent column is fixedly mounted on the upper surface of the sliders.

[0009] Optionally, limit plates are fixedly installed at both ends of the bent column, and a limit groove is fixedly installed between the two limit plates.

[0010] Optionally, a magnet is fixedly installed between the two limiting plates in each group, and the outer surfaces of the two magnets coincide with the outer circular surface of the bent column.

[0011] Optionally, the top of the limiting plate is threaded with a threaded post, and the bottom end of the threaded post is fixedly installed with an arc-shaped pressure block.

[0012] Optionally, a mounting plate is fixedly installed on the upper surface of the base, and a hydraulic cylinder is fixedly installed on the side of the mounting plate away from the bending column. The output end of the hydraulic cylinder slides through the mounting plate and is fixed to the bracket.

[0013] Optionally, a first gear and a second gear are rotatably mounted on the lower surface of the base. The first gear and the second gear rotate concentrically and there is a gap between the first gear and the second gear. A first drive rod is fixedly mounted on the surface of the first gear, and a second drive rod is fixedly mounted on the surface of the second gear. The first drive rod and the second drive rod are rotatably mounted to the lower surfaces of the two moving columns, respectively.

[0014] Optionally, a support plate is fixedly installed on the lower surface of the base, and a first motor and a second motor are fixedly installed on the side of the support plate near the base. A third gear that meshes with a first gear is fixedly installed at the output end of the first motor, and a fourth gear that meshes with a second gear is fixedly installed at the output end of the second motor.

[0015] In summary, compared with existing technologies, the beneficial effects of this solution are as follows: (1) This utility model is fixed from the center of the plate by setting up arc groove, moving column, column, rotating column and bending head, etc., and bending the plate inward by bending the two ends of the plate. During the bending process, the plate is slowly bent by rotating column, and the bent plate is subjected to plastic restriction for a certain period of time to avoid the plate from rebounding, thus effectively improving the processing quality and processing efficiency. (2) This utility model is equipped with slider, bending column, limiting plate, limiting groove, magnet and pressure block, etc. By adjusting the distance between the bending column and the two ends of the plate, it is convenient to adjust the bending radius of the plate and improve the use effect. At the same time, when the plate is bent, it can be fixed so that it can be more stable when it is bent, thereby reducing the error caused by bending and increasing the pass rate of plate production. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model from below; Figure 4 For this Figure 3 Enlarged structural diagram at point A in the diagram; Figure 5 for Figure 1 Schematic diagram of the structure at point B in the diagram; Figure 6 for Figure 2 A schematic diagram of the structure at point C.

[0017] In the diagram: Base 10; Support leg 11; First electric push cylinder 12; Slider 13; Bending column 14; Limiting plate 15; Limiting groove 16; Magnet 17; Threaded column 18; Pressure block 19; Mounting plate 20; Hydraulic cylinder 21; Bracket 22; Bending head 23; Arc groove 24; Moving column 25; Vertical column 26; Rotating column 27; First gear 28; Second gear 29; First drive rod 30; Second drive rod 31; Support plate 32; First motor 33; Third gear 34; Second motor 35; Fourth gear 36. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] refer to Figure 1An adjustable bending radius sheet metal bending machine includes a base 10, with a support leg 11 fixedly installed on the lower surface of the base 10. A mounting plate 20 is fixedly installed on one side of the upper surface of the base 10, and a hydraulic cylinder 21 is fixedly installed on one side of the mounting plate 20. The output end of the hydraulic cylinder 21 slides through the mounting plate 20, and a U-shaped bracket 22 is fixedly installed at its end. A bending head 23 is fixedly installed inside the bracket 22. In use, the hydraulic cylinder 21 pushes the bracket 22 to move, thereby driving the connected bracket 22 and bending head 23 to move, thereby abutting against the middle of the fixed sheet metal and applying pressure to the middle of the sheet metal, causing the sheet metal to bend from the middle.

[0020] Further reference Figure 1 and Figure 2 Two symmetrically arranged sliders 13 are slidably mounted on both sides of the bending head 23 on the upper surface of the base 10. A first electric push cylinder 12 is fixedly mounted on the outer side of the two sliders 13 on the upper surface of the base 10. The output end of the first electric push cylinder 12 is fixed to the outer surface of the slider 13. A bending column 14 is fixedly mounted on the upper surface of the slider 13. Limiting plates 15 are fixedly mounted on the upper and lower surfaces of the bending column 14. A limiting groove 16 is formed between the two limiting plates 15. In use, the plate is placed between the two limiting grooves 16, and the center of the plate is located on the center line between the two bending columns 14 to ensure that the bending position of the plate will not deviate. The operation of the first electric push cylinder 12 can drive the slider 13 to move in the center, change the distance between the two bending columns 14, and cooperate with the bending head 23 of the above scheme to abut against the middle of the plate, thereby changing the length of the two bending edges, and thus adjusting the bending radius of the plate to improve the use effect.

[0021] Further reference Figure 1 and Figure 5 A magnet 17 is fixedly installed between the two limiting plates 15 in each group. The outer surface of the two magnets 17 coincides with the outer circular surface of the bending column 14. When in use, the plate is placed inside the limiting groove 16. At this time, the magnet 17 will attract the plate for pre-fixation, eliminating the need for the operator to hold the plate for fixation, which facilitates the subsequent plate fixing work.

[0022] Further reference Figure 5 The limiting plate 15 located at the top of the bending column 14 is threaded with a threaded column 18. An arc-shaped pressure block 19 is fixedly installed at the bottom of the threaded column 18. When the magnet 17 pre-fixes the plate, the threaded column 18 is rotated. Due to the threaded engagement between the threaded column 18 and the limiting plate 15, the threaded column 18 drives the pressure block 19 to move downward, so that the pressure block 19 abuts against the upper surface of the plate, fixing the plate and ensuring the bending quality. When the plate is bent, the two ends of the plate move. The arc shape at the bottom of the pressure block 19 can reduce the friction between the plate and the plate. When the plate is bent and detached from the pressure block 19, the pressure block 19 is prevented from scratching the upper surface of the plate, ensuring the processing quality.

[0023] Further reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The upper surface of the base 10 has two arc-shaped grooves 24, located at both ends of the plate. A movable column 25 is slidably installed inside each arc-shaped groove 24. Two L-shaped columns 26 are fixedly installed on the top of each movable column 25. A rotating column 27 is rotatably installed between the tops of the two columns 26 and the movable column 25. The plate passes through the space between the two rotating columns 27. A first gear 28 and a second gear 29 are rotatably installed on the lower surface of the base 10. The first gear 28 and the second gear 29 rotate concentrically with a gap between them. The surface of the first gear 28 is fixed. The first drive rod 30 is installed, and the second drive rod 31 is fixedly installed on the surface of the second gear 29. The first drive rod 30 and the second drive rod 31 are rotatably installed on the lower surfaces of the two moving columns 25 respectively. An L-shaped support plate 32 is fixedly installed on the lower surface of the base 10. A first motor 33 and a second motor 35 are fixedly installed on the side of the support plate 32 near the base 10. A third gear 34 that meshes with the first gear 28 is fixedly installed at the output end of the first motor 33. A fourth gear 36 that meshes with the first gear 29 is fixedly installed at the output end of the second motor 35. In use, the first motor 33 and the second motor 35 work simultaneously and rotate in opposite directions. This drives the first gear 28 and the second gear 29 to rotate in opposite directions via the third gear 34 and the second motor 35. In turn, the second drive rod 31 and the first drive rod 30 connected to them pull the moving column 25 to slide in the arc groove 24. Then, the rotating column 27 pulls the two ends of the plate to bend it. The rotating column 27 restricts the bent plate to prevent it from rebounding, effectively improving processing quality and efficiency.

[0024] Working principle: First, the plate is placed between two limiting grooves 16, with the center of the plate located between two bending columns 14. The first electric push cylinder 12 drives the slider 13 to move in the center, changing the distance between the two bending columns 14, which can adjust the bending radius of the plate. At this time, the magnet 17 attracts the plate for pre-fixation. The threaded column 18 is rotated, causing the threaded column 18 to drive the pressure block 19 to move downward, so that the pressure block 19 abuts against the upper surface of the plate, fixing the plate. The hydraulic cylinder 21 pushes the bracket 22 to move, thereby driving the bracket 22 and the bending head 23 connected to it to move and abut against the middle of the fixed plate. The first motor 33 and the second motor 35 are controlled to work simultaneously and rotate in opposite directions, thereby driving the first gear 28 and the second gear 29 to rotate in opposite directions through the third gear 34 and the second motor 35. Then, the second drive rod 31 and the first drive rod 30 connected to it pull the moving column 25 to slide in the arc groove 24, and then the rotating column 27 pulls the two ends of the plate to bend.

[0025] Finally, it should be noted that the purpose of this utility model for an adjustable bending radius plate bending machine is to protect the various mechanical structures and related motion logic in this solution. Therefore, it does not elaborate on the various sensors, detectors, and driving components required for the actual operation of the specific mechanical structures. However, for those skilled in the art, various control systems and electrical connection methods, including various electrical components and driving components, can all be accomplished using conventional technical means. As long as the beneficial effects or the specific actions during the above-mentioned work can be achieved, they can be implemented. This solution does not impose too many restrictions.

[0026] Furthermore, the first electric push cylinder 12, hydraulic cylinder 21, first motor 33, and second motor 35 of the adjustable bending radius plate bending machine in this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0027] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0028] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the conception outlined herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A sheet metal bending machine with adjustable bending radius, comprising a base (10), characterized in that, The upper surface of the base (10) is provided with an adjustment mechanism for adjusting the bending radius during plate processing. The upper surface of the base (10) has two arc-shaped grooves (24). A movable column (25) is slidably installed inside the arc-shaped grooves (24). Two L-shaped columns (26) are fixedly installed on the top of the movable column (25). A rotating column (27) is rotatably installed between the top of the two columns (26) and the movable column (25). A U-shaped bracket (22) is slidably installed on one side of the base (10). A bending head (23) is fixedly installed inside the bracket (22). The bending head (23) is located between the two movable columns (25).

2. The sheet metal bending machine with adjustable bending radius according to claim 1, characterized in that, The adjustment mechanism includes two sliders (13) that slide on the upper surface of the base (10), and a bent column (14) is fixedly installed on the upper surface of the sliders (13).

3. The adjustable bending radius sheet metal bending machine according to claim 2, characterized in that, Limiting plates (15) are fixedly installed at both ends of the bent column (14), and a limiting groove (16) is formed between the two limiting plates (15).

4. The adjustable bending radius sheet metal bending machine according to claim 3, characterized in that, A magnet (17) is fixedly installed between each pair of limiting plates (15), and the outer surface of the two magnets (17) coincides with the outer circular surface of the bent column (14).

5. A sheet metal bending machine with adjustable bending radius according to claim 4, characterized in that, The top of the limiting plate (15) is threaded with a threaded post (18), and an arc-shaped pressure block (19) is fixedly installed at the bottom of the threaded post (18).

6. The sheet metal bending machine with adjustable bending radius according to claim 1, characterized in that, An mounting plate (20) is fixedly installed on the upper surface of the base (10). A hydraulic cylinder (21) is fixedly installed on the side of the mounting plate (20) away from the bending column (14). The output end of the hydraulic cylinder (21) slides through the mounting plate (20) and is fixed to the bracket (22).

7. The sheet metal bending machine with adjustable bending radius according to claim 1, characterized in that, A first gear (28) and a second gear (29) are rotatably mounted on the lower surface of the base (10). The first gear (28) and the second gear (29) rotate concentrically. There is a gap between the first gear (28) and the second gear (29). A first drive rod (30) is fixedly mounted on the surface of the first gear (28), and a second drive rod (31) is fixedly mounted on the surface of the second gear (29). The first drive rod (30) and the second drive rod (31) are rotatably mounted on the lower surfaces of the two moving columns (25), respectively.

8. A sheet metal bending machine with adjustable bending radius according to claim 7, characterized in that, A support plate (32) is fixedly installed on the lower surface of the base (10). A first motor (33) and a second motor (35) are fixedly installed on the side of the support plate (32) near the base (10). A third gear (34) that meshes with the first gear (28) is fixedly installed at the output end of the first motor (33). A fourth gear (36) that meshes with the second gear (29) is fixedly installed at the output end of the second motor (35).

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