Noise isolation device for bending protection

Abstract

The utility model belongs to the technical field of bending machine, concretely relates to a noise isolation device for bending protection, including bending machine body, the inside of bending machine body is provided with upper die, the outside of upper die is fixed with fixed frame, the outside of fixed frame is equipped with the sound absorption board, both sides of fixed frame are all fixed with the ear plate, both sides of sound absorption board upper end are all fixed with fixed column, the upper end of fixed column penetrates ear plate, and ear plate and fixed column slidingly connect, the upper end of sound absorption board and located the outside of fixed column are fixed with spring, the upper end of fixed column inside is equipped with the thread groove, the outside of thread groove is connected with bolt in screw thread, and bolt is located the upper end of ear plate. This utility model can set up sound absorption board outside fixed frame, absorb bending high frequency noise from the source to prevent diffusion, and the sliding cooperation of fixed column and ear plate and the thread groove and bolt locking structure can consider the convenience of sound absorption board dismounting and the installation stability.

Description

Technical Field

[0001] This utility model belongs to the field of bending machine technology, specifically relating to a noise isolation device for bending protection. Background Technology

[0002] A bending machine is a machine capable of bending thin sheet metal. Its main structure includes a frame, a worktable, a slide, and a hydraulic cylinder that drives the slide to slide up and down along the frame. The worktable is located directly below the slide and is mounted on the frame. The cylinder body of the hydraulic cylinder is mounted on the upper part of the frame, and the bottom of the piston rod of the hydraulic cylinder is connected to the slide. In use, the upper and lower dies are mounted on the slide and the worktable, respectively. The up-and-down movement of the slide bending of the metal sheet positioned between the upper and lower dies is achieved.

[0003] Because bending machines generate noise during operation, the contact between the upper die and the workpiece produces high-frequency impact noise. This noise has a high propagation intensity and a wide diffusion range, which not only causes long-term damage to the hearing health of workshop operators but also leads to noise pollution in the workshop environment, failing to meet industrial production noise environmental protection standards. Furthermore, existing bending equipment lacks targeted noise isolation structures, and some simple noise reduction devices suffer from cumbersome installation and disassembly, poor adaptability, and difficulty in meeting the equipment maintenance needs of high-efficiency production. Based on the above problems, this application proposes a noise isolation device for bending protection to improve these issues. Utility Model Content

[0004] The purpose of this invention is to provide a noise isolation device for bending protection, which can absorb high-frequency bending noise from the source and prevent its diffusion by installing a sound-absorbing plate on the outside of the fixed frame; with the sliding fit between the fixed column and the ear plate, as well as the threaded groove and bolt locking structure, the device balances the ease of disassembly and assembly of the sound-absorbing plate with the stability of the installation.

[0005] The specific technical solution adopted in this utility model is as follows: A noise isolation device for bending protection includes a bending machine body. An upper die is disposed inside the bending machine body. A fixed frame is fixed to the outer side of the upper die. A sound-absorbing plate is sleeved on the outer side of the fixed frame. Ear plates are fixed to both sides of the fixed frame. Fixed posts are fixed to both sides of the upper end of the sound-absorbing plate. The upper end of each fixed post penetrates the ear plate, and the ear plate and the fixed post are slidably connected. A spring is fixed to the upper end of the sound-absorbing plate, located outside the fixed post. A threaded groove is formed inside the upper end of the fixed post, and a bolt is threadedly connected to the outer side of the threaded groove, with the bolt located at the upper end of the ear plate.

[0006] In a preferred embodiment, a first sound insulation panel is provided inside the sound-absorbing panel.

[0007] In a preferred embodiment, both ends of the fixed frame are fixed with limiting plates, and both ends of the sound-absorbing panel are provided with limiting grooves, and the limiting plates and limiting grooves are compatible.

[0008] In a preferred embodiment, a shock-absorbing pad is fixed to the lower end of the sound-absorbing panel.

[0009] In a preferred embodiment, a lower die is provided inside the bending machine body and at the lower end of the upper die. Both sides of the lower die are fixed with fixing plates, and a guide hole is provided at one end of the fixing plate.

[0010] In a preferred embodiment, a second sound insulation plate is slidably connected inside the guide hole, a positioning block is fixed to one end of the fixing plate, a positioning plate is disposed inside the positioning block, and the lower end of the positioning plate passes through the positioning block and extends into the interior of the second sound insulation plate.

[0011] The technical effects achieved by this utility model are as follows: This utility model uses a sound-absorbing plate fitted onto the outer fixed frame of the upper mold to absorb high-frequency noise generated by the contact and bending of the upper mold and the workpiece at close range, reducing the propagation intensity of the noise at the source and preventing the noise from spreading to the surrounding environment. The sliding fit design of the fixed column and the ear plate, combined with the locking structure of the threaded groove and the bolt, ensures the convenience of installing and disassembling the sound-absorbing plate. The bolts are locked through the threaded groove to form an axial preload, ensuring the installation stability between the sound-absorbing plate and the fixed frame and the upper mold. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixed frame and sound-absorbing panel structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the guide hole and the second sound insulation plate of this utility model; Figure 4 This is a schematic diagram of the limiting plate and limiting groove of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 10. Bending machine body; 11. Upper die; 12. Fixing frame; 13. Sound-absorbing panel; 14. Ear plate; 15. Fixing column; 16. Spring; 17. Threaded groove; 18. Bolt; 19. First sound insulation panel; 20. Limiting plate; 21. Limiting groove; 22. Vibration damping pad; 23. Lower die; 24. Fixing plate; 25. Guide hole; 26. Second sound insulation panel; 27. Positioning block; 28. Positioning plate. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0017] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0018] Please see the appendix Figure 1 , Figure 2 and Figure 4 As shown, this utility model provides a noise isolation device for bending protection, including a bending machine body 10. An upper die 11 is provided inside the bending machine body 10. A fixing frame 12 is fixed to the outside of the upper die 11. A sound-absorbing plate 13 is sleeved on the outside of the fixing frame 12. Ear plates 14 are fixed on both sides of the fixing frame 12. Fixing posts 15 are fixed on both sides of the upper end of the sound-absorbing plate 13. The upper end of the fixing post 15 passes through the ear plate 14, and the ear plate 14 and the fixing post 15 are slidably connected. A spring 16 is fixed to the upper end of the sound-absorbing plate 13 and located outside the fixing post 15. A threaded groove 17 is opened at the upper end of the inside of the fixing post 15. A bolt 18 is threadedly connected to the outside of the threaded groove 17, and the bolt 18 is located at the upper end of the ear plate 14.

[0019] In this embodiment, when the bending machine body 10 is in operation, the sound-absorbing plate 13 is fitted onto the outside of the fixed frame 12 fixed to the outside of the upper die 11 as the core mounting carrier and is slidably connected to the fixed frame 12. The ear plates 14 on both sides of the fixed frame 12 and the fixed posts 15 on both sides of the upper end of the sound-absorbing plate 13 form a sliding fit, so as to achieve precise positioning and installation of the sound-absorbing plate 13 along the fixed frame 12. Then, the threaded groove 17 at the upper end of the fixed post 15 is threadedly connected to the bolt 18. After tightening the bolt 18, the ear plates 14 are axially pressed and fixed, so as to ensure the installation stability between the sound-absorbing plate 13, the fixed frame 12, and the upper die 11. During operation, the workpiece to be processed is placed on the upper end of the lower die 23. At this time, the upper die 11 moves downward under the drive of the hydraulic components inside the bending machine body 10. The workpiece to be processed is located at the lower end inside the sound-absorbing plate 13. The bending knife assembled in the upper die 11 cooperates with the bending groove in the lower die 23 to complete the bending and forming operation of the workpiece. During this process, the squeezing and collision between the upper mold 11 and the workpiece, and between the workpiece and the lower mold 23, will generate noise. The sound-absorbing plate 13, which is fitted on the outer fixed frame 12 of the upper mold 11, will directly act on the noise source and block the noise from spreading to the surrounding environment. With the sliding fit structure of the fixed column 15 and the ear plate 14, the axial preload formed by the bolt 18 locking through the threaded groove 17 allows the sound-absorbing plate 13 to be directly fitted on the outer fixed frame 12 of the upper mold 11. This can absorb the high-frequency noise generated when the upper mold 11 contacts and bends the workpiece at close range, reducing the propagation intensity from the noise source and improving the noise reduction effect of the working environment. In addition, the sliding fit design of the fixed column 15 and the ear plate 14, combined with the locking structure of the threaded groove 17 and the bolt 18, ensures the ease of installation and disassembly of the sound-absorbing plate 13.

[0020] In a preferred embodiment, please refer to Figure 2 The sound-absorbing panel 13 has a first sound-insulating panel 19 inside.

[0021] In this embodiment, when the bending machine body 10 is in operation, the noise generated by the upper die 11 and the lower die 23 bending the workpiece is first absorbed by the outer layer material of the sound-absorbing plate 13 to absorb the high-frequency vibration sound waves, and then blocked by the inner first sound insulation plate 19 to block the low-frequency penetrating noise. By utilizing the synergistic effect of the double-layer structure, the layered interception of noise propagation path is achieved.

[0022] Secondly, please refer to it again. Figure 4 Both ends of the fixed frame 12 are fixed with limit plates 20, and both ends of the sound-absorbing plate 13 are provided with limit grooves 21, and the limit plates 20 and the limit grooves 21 are compatible.

[0023] In this embodiment, symmetrical limiting plates 20 are fixed at both ends of the fixed frame 12, and corresponding limiting grooves 21 that are perfectly matched in size and shape to the limiting plates 20 are opened at both ends inside the sound-absorbing plate 13. When the sound-absorbing plate 13 is sleeved on the outside of the fixed frame 12, the limiting plates 20 will be precisely embedded in the limiting grooves 21. Through the concave-convex cooperation between the limiting plates 20 and the limiting grooves 21, a dual positioning constraint in both circumferential and axial directions is formed. Combined with the sliding connection structure between the ear plates 14 on both sides of the fixed frame 12 and the upper fixing post 15 of the sound-absorbing plate 13, the sound-absorbing plate 13 is positioned in all directions on the fixed frame 12, so as to avoid the sound-absorbing plate 13 from rotating circumferentially or shifting axially due to vibration when the bending machine body 10 is operating, and to ensure that the sound-absorbing plate 13 always remains in contact with the upper mold 11.

[0024] Secondly, please refer to the following as well. Figure 2 The lower end of the sound-absorbing panel 13 is fixed with a shock-absorbing pad 22.

[0025] In this embodiment, the vibration generated by the upper die 11 and the lower die 23 bending the workpiece will be transmitted to the sound-absorbing plate 13 through the fixed frame 12. At this time, the damping pad 22 absorbs the vibration energy through its own elastic deformation. At the same time, the friction damping effect of the damping pad 22 and the lower die 23 or the internal contact surface of the bending machine body 10 is used to weaken the vibration propagation path.

[0026] To further understand and explain, Figure 1 and Figure 3 For example, a lower die 23 is provided inside the body 10 of the bending machine and at the lower end of the upper die 11. Fixing plates 24 are fixed on both sides of the lower die 23, and a guide hole 25 is provided at one end of the fixing plate 24.

[0027] In this embodiment, a lower die 23 is disposed inside the bending machine body 10 and directly below the upper die 11, serving as a support carrier for bending the workpiece. Simultaneously, fixing plates 24 are symmetrically fixed on both sides of the lower die 23. A through-hole guide hole 25 is formed inside the fixing plate 24 near the workpiece bending area. The guide hole 25 is parallel to and corresponds in position to the bending working surface of the lower die 23, providing a precise guiding channel for the subsequent installation and sliding adjustment of the second sound insulation plate 26. In a preferred embodiment, please refer to Figure 3 The guide hole 25 is slidably connected to the second sound insulation plate 26. One end of the fixing plate 24 is fixed with a positioning block 27. The positioning block 27 is provided with a positioning plate 28. The lower end of the positioning plate 28 passes through the positioning block 27 and extends into the interior of the second sound insulation plate 26.

[0028] It should be noted that the bending groove fixed on the lower die 23 can be replaced and disassembled through the guide hole 25.

[0029] In this embodiment, the second sound insulation plate 26 is assembled in the guide hole 25 of the fixed plate 24 using a sliding fit, so that the extension length of the second sound insulation plate 26 can be precisely adjusted along the axial direction of the guide hole 25. At the same time, a positioning block 27 is fixed at one end of the fixed plate 24 near the port of the guide hole 25. The positioning block 27 has a reserved installation channel that matches the positioning plate 28. The positioning plate 28 moves up and down through the guide structure that passes through the positioning block 27. When the second sound insulation plate 26 is adjusted to the target position according to the width of the workpiece, the positioning plate 28 is pressed down so that its lower end is embedded in the preset positioning hole of the second sound insulation plate 26, forming a mechanical locking fixation. Combined with the symmetrical layout on both sides of the lower mold 23, together with the sound-absorbing plate 13 on the outer side of the upper mold 11 and the first sound insulation plate 19, a comprehensive noise interception system is constructed to achieve precise isolation of lateral noise from the bending operation.

[0030] The working principle of this utility is as follows: When the bending machine body 10 is in operation, the workpiece to be processed is placed on the upper end of the lower die 23 directly below the upper die 11. The upper die 11 moves downward under the drive of the hydraulic components inside the bending machine body 10. The bending blade in the upper die 11 cooperates with the bending groove in the lower die 23 to complete the bending and forming of the workpiece. The guide hole 25 can realize the replacement and disassembly of the bending groove on the lower die 23 to adapt to different bending requirements. The fixing frame 12 fixed on the outside of the upper die 11 covers the sound-absorbing plate 13 on its outside. The ear plates 14 on both sides of the fixing frame 12 and the upper fixing post 15 of the sound-absorbing plate 13 are slidably engaged to achieve precise positioning. Then, the internal thread groove 17 of the fixing post 15 and the threaded connection of the bolt 18 form an axial pressing and fixing. At the same time, the limiting plates 20 at both ends of the fixing frame 12 are embedded in the limiting groove 21 inside the sound-absorbing plate 13 to ensure that the sound-absorbing plate 13 is tightly fitted with the fixing frame 12 and the upper die 11 without displacement. By first absorbing high-frequency vibration sound waves and then blocking low-frequency penetrating noise, layered noise reduction is achieved; the damping pad 22 at the lower end of the sound-absorbing plate 13 absorbs bending vibration energy through elastic deformation, weakening the vibration propagation path; the guide holes 25 of the fixing plates 24 on both sides of the lower mold 23 provide sliding guidance for the second sound insulation plate 26, and the positioning plate 28 in the positioning block 27 penetrates and embeds into the second sound insulation plate 26 to achieve locking, blocking high-frequency, low-frequency and lateral scattered noise generated by bending operations from the source and propagation path in multiple dimensions.

[0031] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A noise isolation device for bending protection, comprising a bending machine body (10), wherein an upper die (11) is disposed inside the bending machine body (10), characterized in that: A fixed frame (12) is fixed to the outside of the upper mold (11). A sound-absorbing plate (13) is sleeved on the outside of the fixed frame (12). Ear plates (14) are fixed on both sides of the fixed frame (12). Fixed posts (15) are fixed on both sides of the upper end of the sound-absorbing plate (13). The upper end of the fixed post (15) passes through the ear plate (14). The ear plate (14) and the fixed post (15) are slidably connected. A spring (16) is fixed to the upper end of the sound-absorbing plate (13) and outside the fixed post (15). A threaded groove (17) is opened at the upper end of the fixed post (15). A bolt (18) is threaded to the outside of the threaded groove (17). The bolt (18) is located at the upper end of the ear plate (14).

2. The noise isolation device for bending protection according to claim 1, characterized in that: The sound-absorbing panel (13) has a first sound-insulating panel (19) inside.

3. The noise isolation device for bending protection according to claim 1, characterized in that: Both ends of the fixed frame (12) are fixed with limiting plates (20), and both ends of the sound-absorbing plate (13) are provided with limiting grooves (21), and the limiting plates (20) and limiting grooves (21) are compatible.

4. A noise isolation device for bending protection according to claim 1, characterized in that: The lower end of the sound-absorbing panel (13) is fixed with a shock-absorbing pad (22).

5. A noise isolation device for bending protection according to claim 1, characterized in that: A lower die (23) is provided inside the body (10) of the bending machine and at the lower end of the upper die (11). A fixing plate (24) is fixed on both sides of the lower die (23), and a guide hole (25) is provided at one end of the fixing plate (24).

6. A noise isolation device for bending protection according to claim 5, characterized in that: The guide hole (25) is slidably connected to a second sound insulation plate (26). One end of the fixing plate (24) is fixed with a positioning block (27). The positioning block (27) is provided with a positioning plate (28). The lower end of the positioning plate (28) passes through the positioning block (27) and extends into the interior of the second sound insulation plate (26).

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