Bending mechanism based on microtexture

Abstract

The utility model provides a bending mechanism based on microtexture, including bending platform and bending tool bit, bending platform and bending tool bit molding area are respectively provided with protruding microtexture, protruding microtexture includes first protruding microtexture and second protruding microtexture, the first protruding microtexture is located at the bending platform end portion, the second protruding microtexture is located at the bending platform end portion, and the second protruding microtexture is located at the bending platform end portion. The second protruding microtextures are located in the forming area of the bending tool bit, and the distribution density of the first protruding microtextures is larger than that of the second protruding microtextures. The protruding height of the first protruding micro-textures is smaller than that of the second protruding micro-textures. According to the utility model, more uniform and concentrated stress is generated at the bending part of the plate, and larger and uniform plastic deformation is generated at the bending part of the plate, so that a local uniform hardening effect is caused, and the springback amount of the bent plate can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of processing machinery, and in particular to a bending mechanism based on microtexture. Background Technology

[0002] Bending is a metal forming process that applies external force to cause plastic deformation of metal materials at specific locations, changing their geometry and forming shapes with certain angles and curvatures. Due to its efficiency, flexibility, and economy, bending is widely used in manufacturing and processing various metal products, such as structural components, supports, and panels. However, the most common and serious problem encountered during bending is material springback. Due to the internal stress and elasticity of the material, the plastic deformation of the bent sheet partially recovers after the applied external load is removed, causing springback. Springback can lead to dimensional discrepancies in the sheet, complicating manufacturing and assembly processes and potentially causing economic losses. The amount of springback is influenced by various factors, including material properties, sheet thickness, and process parameters. Springback cannot be completely avoided; methods can only be used to control it, such as process control and die compensation. However, process control has limitations in predicting and controlling the accuracy of springback, especially when dealing with complex shapes or high-precision parts, where it may not achieve the desired springback effect. Die compensation requires special design and manufacturing of the die, as well as multiple experiments and adjustments, increasing production preparation time and costs. When encountering new materials or processes, the compensation strategy may need to be re-evaluated and adjusted. Furthermore, most commercially available bending mechanisms are not suitable for continuous bending operations, requiring adjustment and measurement of the material to be bent for each operation, increasing worker workload and affecting work efficiency.

[0003] In summary, the problems faced by bending mechanisms in practical applications include:

[0004] 1. How to more easily reduce the springback of sheet metal during bending operations and improve bending accuracy;

[0005] 2. How to achieve automatic delivery of sheet metal to be bent and improve work efficiency. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a bending mechanism based on microtexture. By setting raised microtextures in the forming areas of the bending platform and the bending cutter head, during bending operations, the raised microtextures on the bending platform and the forming area of ​​the bending cutter head work together to guide the movement of the neutral layer of the sheet metal. Simultaneously, this generates relatively uniform and concentrated stress at the bending point, resulting in larger and more uniform plastic deformation at the bending point, thereby causing a localized uniform hardening effect. This effectively reduces the springback of the sheet metal after bending, not only reducing the wear and tear on the mold and extending its service life, but also significantly improving the quality of the formed parts and achieving precise bending operations on the sheet metal.

[0007] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0008] A bending mechanism based on microtexture includes a bending platform and a bending cutter head, wherein raised microtextures are respectively provided at the end of the bending platform and the forming area of ​​the bending cutter head.

[0009] Furthermore, the microtexture-based bending mechanism also includes a driving pulley and a driven pulley. The driving pulley is mounted vertically above the bending platform, and the driven pulley is disposed in a groove on the surface of the bending platform. The driving pulley and the driven pulley cooperate to transfer the material to be bent.

[0010] Furthermore, the driven pulley is provided with an elastic device at its bottom. The elastic device is used to lift the highest point of the driven pulley to above the bending platform surface. When the driven pulley is compressed downward by an external force, the compressed elastic device can ensure that the highest point of the driven pulley is not higher than the bending platform surface.

[0011] Furthermore, the microtexture-based bending mechanism also includes a hydraulic fixing system for fixing the material to be bent.

[0012] Furthermore, the raised microtexture includes a first raised microtexture and a second raised microtexture. The first raised microtexture is located at the end of the bending platform, and the second raised microtexture is located in the forming area of ​​the bending head. The distribution density of the first raised microtexture is greater than that of the second raised microtexture. The raised height of the first raised microtexture is less than that of the second raised microtexture.

[0013] Furthermore, the protrusion height of the first protrusion microtexture is 4–20 μm; the protrusion height of the second protrusion microtexture is 10–30 μm.

[0014] Furthermore, the first protruding microtexture is hemispherical; the second protruding microtexture is semi-ellipsoidal.

[0015] Furthermore, the area density of the first protruding microtexture is 40% to 60%; the area density of the second protruding microtexture is 30% to 50%.

[0016] Furthermore, the bending head forming area is alternately divided into high-density area and low-density area along the center line of the forming area to both sides, and the distribution density of the second protruding microtexture in the high-density area is greater than the distribution density of the second protruding microtexture in the low-density area.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The microtexture-based bending mechanism of this utility model, by setting raised microtextures at the end of the bending platform and the forming area of ​​the bending cutter head, guides the movement of the neutral layer of the sheet metal during bending operations. Simultaneously, it generates relatively uniform and concentrated stress at the bending point, resulting in larger and more uniform plastic deformation and thus causing a localized uniform hardening effect. This effectively reduces the springback of the sheet metal after bending, improves the quality and precision of the formed parts, and enables automatic sheet metal delivery through the cooperation of the driving pulley and the driven pulley, improving the automation level and efficiency of the bending operation and significantly enhancing work efficiency.

[0019] 2. The microtexture-based bending mechanism of this utility model is provided with a first raised microtexture and a second raised microtexture with different distribution densities at the end of the bending platform and the forming area of ​​the bending cutter head. The distribution density of the first raised microtexture is greater than that of the second raised microtexture, and the protrusion height of the first raised microtexture is less than that of the second raised microtexture. In this way, the first raised microtexture with a higher distribution density can better strengthen the surface of the bottom of the bent part. The surface of the bottom is generally the plane on both sides of the bending point. The first raised microtexture with a lower distribution density can apply greater pressure to the bent material during bending, thereby controlling the springback angle to a certain extent. Moreover, the bottom surface can more evenly distribute the bending force, reduce local stress concentration, and prevent cracking during the bending process.

[0020] 3. The microtexture-based bending mechanism of this invention divides the forming area of ​​the bending cutter head into alternating high-density and low-density zones along the centerline of the forming area. The distribution density of the second protruding microtexture in the high-density zone is greater than that in the low-density zone. During bending, a complex stress distribution is generated inside the material. The alternating distribution of high and low densities optimizes the stress distribution and reduces local stress concentration. Furthermore, the alternating distribution of high and low densities allows for more precise control of material flow, especially in the edge areas of the bend. The microtexture in the high-density zone provides more contact points and friction, thereby better controlling the material flow and deformation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the microtexture-based bending mechanism described in this utility model.

[0023] Figure 2 This is a schematic diagram of the surface of the bending platform described in this utility model.

[0024] Figure 3 This is a schematic diagram of the bending cutter head described in this utility model.

[0025] Figure 4 This is a schematic diagram of the driven pulley module described in this utility model.

[0026] Figure 5 This is a schematic diagram of the distribution density of the second protrusion microtexture in the forming area of ​​the bending cutter head described in this utility model.

[0027] In the picture:

[0028] 1-Bending frame; 2-Hydraulic bending system; 3-Sheet material; 4-Bending platform; 5-Driven pulley; 6-Drive pulley; 7-Hydraulic fixing system; 8-Fixed frame; 9-Raised microtexture; 9-1-First raised microtexture; 9-2-Second raised microtexture; 10-Bending cutter head; 11-Elastic device; 12-Surface groove; 13-High-density area; 14-Low-density area. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] like Figure 1As shown, the micro-textured bending mechanism of this utility model includes a bending frame 1, a hydraulic bending system 2, a bending platform 4, a driven pulley 5, a driving pulley 6, a hydraulic fixing system 7, and a fixing frame 8. The driving pulley 6 is vertically mounted above the bending platform 4, and the driven pulley 5 is disposed in a groove 12 on the surface of the bending platform 4. The driving pulley 6 and the driven pulley 5 cooperate to transfer the material to be bent. Preferably, an elastic device 11 is provided at the bottom of the driven pulley 5. The elastic device 11 is used to lift the highest point of the driven pulley 5 to above the surface of the bending platform 4, so that the sheet metal 3 can move forward to the target position through the cooperation of the driving pulley 6 and the driven pulley 5. The hydraulic fixing system 7 is disposed in the middle of the bending platform through the fixing frame 8. The hydraulic fixing system 7 is engaged with the bending platform 4 via a sliding groove and fixed with bolts, ensuring that the hydraulic fixing system 7 cannot move arbitrarily and ensuring the stability of the fixing device, so as to more firmly fix the sheet material to be bent; when the driven pulley 5 is compressed downward by the fixing action of the hydraulic fixing system 7, the compressed elastic device 11 can ensure that the highest point of the driven pulley 5 is not higher than the surface of the bending platform 4, so that the sheet material to be bent is fixed to the surface of the bending platform, making the fixing of the sheet material more secure and preventing the sheet material from shifting; the hydraulic bending system 2 is set in front of the end of the bending platform 4 through the fixed connection between the bending frame 1 and the ground, and the bending cutter head 10 is installed below the hydraulic bending system 2. The hydraulic bending system 2 provides power to drive the bending cutter head 10 to move downward to perform bending operation on the sheet material 3.

[0033] The bending platform 4 and the forming area of ​​the bending cutter head 10 are respectively provided with raised microtextures 9. The bending platform 4 can be understood as the bending area. When the sheet metal is bent, the neutral layer of the sheet metal is guided to move, and at the same time, a relatively uniform and concentrated stress is generated at the bending point of the sheet metal, resulting in a large and uniform plastic deformation at the bending point of the sheet metal, thereby causing a local uniform hardening effect. This can effectively reduce the springback of the sheet metal after bending and improve the quality and precision of the formed parts. Through the cooperation of the drive pulley and the driven pulley, the sheet metal can be automatically delivered, improving the automation level and efficiency of the bending operation and significantly enhancing the work efficiency.

[0034] To further improve stress concentration and springback, the protruding microtexture 9 of this invention includes a first protruding microtexture 9-1 and a second protruding microtexture 9-2. The first protruding microtexture 9-1 is located at the end of the bending platform 4, and the second protruding microtexture 9-2 is located in the forming area of ​​the bending head 10. The distribution density of the first protruding microtexture 9-1 is greater than that of the second protruding microtexture 9-2. The protrusion height of the first protruding microtexture 9-1 is less than that of the second protruding microtexture 9-2. The protrusion height of the first protruding microtexture 9-1 is 4–20 μm. The second protruding microtexture 9-2… The protrusion height is 10–30 μm; the area density of the first protrusion microtexture 9-1 is 40%–60%; and the area density of the second protrusion microtexture 9-2 is 30%–50%. This high-density distribution of the first protrusion microtexture allows for better reinforcement of the bottom surface of the bent part, which is generally the plane on both sides of the bend. Conversely, the low-density distribution of the first protrusion microtexture allows for greater pressure on the bent material during bending, thereby controlling the springback angle to some extent. Furthermore, the bottom surface can more evenly distribute the bending force, reducing local stress concentration and preventing cracking during the bending process. In this embodiment, the first protrusion microtexture 9-1 is hemispherical; and the second protrusion microtexture 9-2 is semi-ellipsoidal.

[0035] To avoid stress concentration and deformation, the forming area of ​​the bending head 10 is alternately divided into high-density and low-density zones along the centerline of the forming area. The distribution density of the second protruding microtexture 9-2 in the high-density zone is greater than that in the low-density zone. During bending, a complex stress distribution occurs within the material. The alternating distribution of high and low densities optimizes the stress distribution and reduces local stress concentration. Furthermore, the alternating distribution of high and low densities allows for more precise control of material flow, especially at the edge of the bend. The microtexture in the high-density zone provides more contact points and friction, thereby better controlling material flow and deformation.

[0036] Working principle:

[0037] The sheet metal 3 is placed on the bending platform 4, and the lower surface of the sheet metal 3 contacts the driven pulley 5. The liftable drive pulley 6 is lowered to the upper surface of the sheet metal. The drive pulley 6 is activated so that the sheet metal 3 can move forward smoothly and accurately in the predetermined direction. When the sheet metal 3 is successfully moved to the predetermined fixed position, the motor automatically stops rotating to ensure that the sheet metal 3 is stably positioned at the starting position of the bending operation.

[0038] Once the sheet metal 3 is moved to the predetermined position, the hydraulic fixing system begins to operate, controlling the fixing block to move downwards gradually via hydraulic rods. During this process, when the fixing block just contacts the upper surface of the sheet metal 3, the elastic device 11 at the bottom of the driven pulley 5 does not deform. As the hydraulic fixing system continues to move downwards, the elastic device 11 at the bottom of the driven pulley 5 is compressed until the compressed elastic device 11 ensures that the highest point of the driven pulley 5 is not higher than the surface of the bending platform 4. At this point, the lower surface of the sheet metal 3 is in complete and firm contact with the bending platform 4, preventing the sheet metal from shifting and ensuring that the sheet metal 3 remains stable during bending operations. This provides precise positioning and support for subsequent hydraulic bending operations.

[0039] Once the sheet metal 3 is fixed, the hydraulic bending system 2 begins operation. The hydraulic bending system 2 drives the bending cutter head 10 downwards, precisely bending the sheet metal 3 to a predetermined angle. Under the control of the hydraulic bending system 2, the bending process is smooth and controllable, applying uniform pressure to the sheet metal 3 to ensure accuracy and consistency during the forming process. Raised microtextures 9 are respectively provided at the end of the bending platform 4 and in the forming area of ​​the bending cutter head 10. When the sheet metal 3 is bent downwards under force, the raised microtextures 9 not only change the frictional characteristics of the bent portion of the sheet metal 3, altering the neutral layer of the bent portion, but also generate more concentrated stress at the bent portion, allowing for greater plastic deformation and thus causing a hardening effect. This effectively reduces springback in the bent sheet metal 3, improving the bending quality and accuracy to achieve the desired effect.

[0040] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0041] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A bending mechanism based on microtexture, characterized in that, The device includes a bending platform (4) and a bending cutter head (10). The bending platform (4) end and the forming area of ​​the bending cutter head (10) are respectively provided with raised micro-textures (9). The raised micro-textures (9) include a first raised micro-texture (9-1) and a second raised micro-texture (9-2). The first raised micro-texture (9-1) is located at the end of the bending platform (4), and the second raised micro-texture (9-2) is located in the forming area of ​​the bending cutter head (10). The distribution density of the first raised micro-texture (9-1) is greater than the distribution density of the second raised micro-texture (9-2). The protrusion height of the first raised micro-texture (9-1) is less than the protrusion height of the second raised micro-texture (9-2).

2. The bending mechanism based on microtexture according to claim 1, characterized in that, It also includes a drive pulley (6) and a driven pulley (5). The drive pulley (6) is mounted above the bending platform (4) in a height-adjustable manner. The driven pulley (5) is set in a groove (12) on the surface of the bending platform (4). The drive pulley (6) and the driven pulley (5) cooperate to transfer the material to be bent.

3. The bending mechanism based on microtexture according to claim 2, characterized in that, The driven pulley (5) is provided with an elastic device (11) at its bottom. The elastic device (11) is used to lift the highest point of the driven pulley (5) to above the surface of the bending platform (4). When the driven pulley (5) is compressed downward by an external force, the compressed elastic device (11) can ensure that the highest point of the driven pulley (5) is not higher than the surface of the bending platform (4).

4. The bending mechanism based on microtexture according to claim 1, characterized in that, It also includes a hydraulic fixing system (7) for fixing the material to be bent.

5. The bending mechanism based on microtexture according to claim 1, characterized in that, The first protruding microtexture (9-1) has a protrusion height of 4 to 20 μm; the second protruding microtexture (9-2) has a protrusion height of 10 to 30 μm.

6. The bending mechanism based on microtexture according to claim 1, characterized in that, The first protruding microtexture (9-1) is hemispherical; the second protruding microtexture (9-2) is semi-ellipsoidal.

7. The bending mechanism based on microtexture according to claim 1, characterized in that, The area density of the first protruding microtexture (9-1) is 40% to 60%; the area density of the second protruding microtexture (9-2) is 30% to 50%.

8. The bending mechanism based on microtexture according to claim 1, characterized in that, The bending head (10) is divided into high-density and low-density areas on both sides along the center line of the forming area. The distribution density of the second protruding microtexture (9-2) in the high-density area is greater than that of the second protruding microtexture (9-2) in the low-density area.

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