A linkage device for noise reduction and noise abatement of punch press discharge

Abstract

The utility model relates to a kind of muffling and noise reduction linkage for punch outlet, belong to noise reduction equipment technical field, and the device solves the problem that punch outlet is big and easy to accumulate dust.The device includes noise reduction pipe, side end is equipped with the cover plate that can rotate around rotating shaft, for sealing and preventing dust accumulation, positioning assembly includes slide rod, clamping rod, connecting rod, spring, first connecting plate and handle, by pulling handle, clamping rod is connected with closed or open positioning slot, cover plate positioning is realized, noise reduction pipe is fixed in punch noise reduction cover, and four noise reduction plates are spliced, each noise reduction plate has multilayer structure, outer layer is galvanized steel sheet, low-frequency damping layer is low-frequency damping felt, rigid support sound insulation layer is cement fiberboard, sound absorption layer is centrifugal glass wool, inner layer is galvanized perforated plate, and each layer cooperates to realize efficient noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction equipment technology, and in particular to a noise reduction linkage device for the discharge port of a punch press. Background Technology

[0002] In modern industrial production, punch presses are an important processing equipment widely used in many fields such as automobile manufacturing, electronics, and household hardware. They apply pressure to materials through a die, causing plastic deformation to obtain the desired shape. They are characterized by rapid production and high material utilization, making them particularly suitable for mass production.

[0003] Traditional methods for noise reduction at the punch press outlet mainly involve setting up simple sound barriers or using ordinary sound-absorbing materials near the outlet. Simple sound barriers can only block some noise and cannot fundamentally solve the noise problem, resulting in limited noise reduction effects. Ordinary sound-absorbing materials are not effective at absorbing noise of different frequencies, especially the complex frequency noise generated by punch presses, making it difficult to achieve ideal noise reduction effects. Moreover, when the punch press is not in use, traditional devices cannot effectively prevent dust accumulation, affecting the service life and subsequent performance of the equipment. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing technology where traditional devices cannot effectively prevent dust accumulation, which affects the service life and subsequent use of the equipment. Therefore, a noise reduction linkage device for the discharge port of a punch press is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A noise reduction linkage device for the punch press outlet includes a noise reduction tube, which is fixed inside the punch press noise reduction cover for noise reduction treatment of the punch press outlet. The noise reduction tube is composed of four noise reduction plates spliced ​​together. Each noise reduction plate includes an outer protective sound insulation layer, a low frequency damping layer, a rigid support sound insulation layer, a sound absorption layer and an inner sound-permeable protective layer from the outside to the inside. To prevent dust accumulation when the punch press is not in use, a cover plate for sealing the noise reduction tube is provided on the side end. First connecting plates are welded and fixed on both sides of the noise reduction tube. Rotating shafts are rotatable in both first connecting plates. The cover plate is fixed between the two rotating shafts. A positioning component is provided between the cover plate and the two first connecting plates. The positioning component is used to position the cover plate when it is opened and closed.

[0006] In one possible design, the outer protective sound insulation layer is made of 2mm thick galvanized steel sheet, the low-frequency damping layer is made of 2mm thick low-frequency damping felt, the rigid support sound insulation layer is made of 12mm thick cement fiberboard, the rigid support sound insulation layer and the outer protective sound insulation layer have the same dimensions, the sound-absorbing layer is made of 48kg / m³ glass wool, the glass wool is filled between the rigid support sound insulation layer and the inner sound-permeable protective layer to form a sound-absorbing layer, the sound-absorbing layer has a thickness of 100mm, and the inner sound-permeable protective layer is made of 1mm thick galvanized perforated plate.

[0007] In one possible design, the surface of the outer protective sound insulation layer is degreased to prevent oil stains from affecting the subsequent bonding of the low-frequency damping layer.

[0008] In one possible design, the low-frequency damping layer is bonded to an outer protective sound insulation layer with epoxy resin, without any air bubbles or gaps.

[0009] In one possible design, the density of the cement fiberboard is 1.2 g / cm³.

[0010] In one possible design, the glass wool is made of centrifugal glass wool material with a fiber diameter of 5-8μm and a porosity of ≥90%. The glass wool is bonded to the inner side of the rigid support sound insulation layer to ensure that there is no loosening.

[0011] In one possible design, the galvanized perforated plate has a perforation rate of 15%, a hole diameter of 3 mm, a hole spacing of 8 mm, and is arranged in a quincunx pattern.

[0012] In one possible design, the positioning component includes a groove formed in the cover plate, a sliding rod sliding in the groove, a locking rod fixed in the sliding rod, and closed positioning grooves and open positioning grooves formed on the surfaces of the two first connecting plates. The locking rods alternately engage with the corresponding two closed positioning grooves and two open positioning grooves. Two connecting rods are fixed to the bottom end of the sliding rod, and both connecting rods movably pass through the bottom end of the cover plate. The bottom end of the two connecting rods is fixed to the same second connecting plate. Springs are sleeved on the surfaces of the two connecting rods, and the two ends of the two springs abut against the side ends of the cover plate and the connecting plate, respectively. The second connecting plate is pushed downward by the elasticity of the spring. The second connecting plate drives the slide rod and the locking rod to move downward and engage in the closed positioning groove or the open positioning groove. When the locking rod is engaged in the closed positioning groove, the cover plate remains sealed. When the locking rod is engaged in the open positioning groove, the cover plate remains open.

[0013] In one possible design, a handle is fixed to the surface of the second connecting plate.

[0014] In this application, the connecting plate is pushed downward by the elasticity of the spring, and the second connecting plate drives the slide rod and the locking rod to move downward and engage in the closed positioning groove or the open positioning groove. When the locking rod is engaged in the closed positioning groove, the cover plate remains sealed, and when the locking rod is engaged in the open positioning groove, the cover plate remains open.

[0015] Beneficial Effects: In this utility model, the noise reduction linkage device for the punch press outlet features a multi-layered structure design of the noise reduction tube, which significantly reduces noise at the punch press outlet. The outer protective sound insulation layer is made of galvanized steel plate, which, due to its good strength and corrosion resistance, not only effectively blocks the erosion of the external environment but also blocks part of the noise propagation, preventing noise from spreading outward. The low-frequency damping layer uses low-frequency damping felt, which is tightly bonded to the outer protective sound insulation layer. By suppressing the vibration of the plate, it reduces low-frequency noise generated by vibration, effectively reducing noise interference in the low-frequency range. The cement fiberboard that rigidly supports the sound insulation layer provides rigid support for the entire noise reduction board, enhancing the stability of the structure and also blocking noise, further reducing noise propagation. The centrifugal glass wool in the sound-absorbing layer, due to its small fiber diameter and high porosity, can fully absorb sound wave energy, converting sound energy into heat energy and effectively reducing noise intensity. The galvanized perforated plate of the inner sound-permeable protective layer not only ensures that sound can be transmitted smoothly to the sound-absorbing layer, but also protects the internal structure and ensures the stable operation of the entire noise reduction tube. In this invention, a noise reduction and silencing linkage device for a punch press outlet is described. When the punch press is not in use, the cover plate can seal the noise reduction tube, effectively preventing dust accumulation. Dust accumulation not only affects the noise reduction effect of the tube but may also corrode the internal structure, shortening the equipment's service life. The cover plate solves this problem. The positioning component accurately positions the cover plate when it is opened and closed. The operator operates the positioning component by gripping the handle, using the spring's elasticity to engage the locking rod with the closing or opening positioning slot, thus stably maintaining the cover plate in its open or closed state. This design facilitates operation, improves the convenience and reliability of the device, and makes the entire noise reduction and silencing linkage device more practical. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional view of a noise reduction linkage device for the discharge port of a punch press, which is fixed inside the noise reduction cover of the punch press. Figure 2 This is a partial side view of a noise reduction linkage device for the discharge port of a punch press, as proposed in this utility model. Figure 3 This is a partial three-dimensional schematic diagram of a noise reduction linkage device for the discharge port of a punch press, as proposed in this utility model.

[0017] In the diagram: 1. Outer protective sound insulation layer; 2. Low-frequency damping layer; 3. Rigid support sound insulation layer; 4. Sound absorption layer; 5. Inner sound-permeable protective layer; 6. Noise reduction tube; 7. Cover plate; 8. First connecting plate; 9. Locking rod; 10. Slide groove; 11. Slide rod; 12. Rotating shaft; 13. Connecting rod; 14. Spring; 15. Second connecting plate; 16. Handle; 17. Closed positioning groove; 18. Opening positioning groove. Detailed Implementation

[0018] 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.

[0019] In one embodiment: Refer to Figures 1-3 A noise reduction linkage device for the discharge port of a punch press, which is applied in the field of noise reduction equipment technology, includes a noise reduction tube 6. A cover plate 7 is provided on the side end of the noise reduction tube 6 to seal the noise reduction tube 6 when the punch press is not in use to prevent dust accumulation. The cover plate 7 is connected to the first connecting plates 8 welded and fixed to both ends of the noise reduction tube 6 through a rotating shaft 12. Specifically, the two rotating shafts 12 are respectively rotatably installed in the two first connecting plates 8, and the cover plate 7 is fixed between the two rotating shafts 12, so that the cover plate 7 can rotate around the rotating shaft 12 to realize the opening and closing operation. The positioning component is used to position the cover plate 7 when it is opened and closed. The positioning component includes a slide groove 10 opened in the cover plate 7, a slide rod 11 sliding in the slide groove 10, and a locking rod 9 fixed in the slide rod 11. The surfaces of the two first connecting plates 8 are provided with a closed positioning groove 17 and an open positioning groove 18. The locking rod 9 can be engaged with the corresponding two closed positioning grooves 17 or two open positioning grooves 18 respectively. The bottom end of the slide rod 11 is fixed with two connecting rods 13. The two connecting rods 13 move through the bottom end of the cover plate 7 and remain smooth during the movement without jamming. The bottom end of the two connecting rods 13 is fixed with the same second connecting plate 15. The surfaces of the two connecting rods 13 are fitted with springs 14. The two ends of the two springs 14 abut against the side ends of the cover plate 7 and the second connecting plate 15 respectively. The surface of the second connecting plate 15 is fixed with a handle 16 for easy gripping and operation by the operator. The working principle of the positioning component is as follows: When it is necessary to open the cover plate 7, the operator holds the handle 16 and pulls the second connecting plate 15 upward. The second connecting plate 15 drives the connecting rod 13 and the sliding rod 11 to move upward, causing the locking rod 9 to disengage from the closed positioning groove 17. Then, the cover plate 7 is rotated to the open position, and the handle 16 is released. The elasticity of the spring 14 pushes the second connecting plate 15 downward. The second connecting plate 15 drives the sliding rod 11 and the locking rod 9 to move downward and engage in the opening positioning groove 18, thereby keeping the cover plate 7 in the open state. When it is necessary to close the cover plate 7, the operator holds the handle 16 again and pulls the second connecting plate 15 upward, causing the locking rod 9 to disengage from the opening positioning groove 18. The cover plate 7 is rotated to the closed position, and the handle 16 is released. Under the action of the spring 14, the locking rod 9 engages in the closed positioning groove 17, keeping the cover plate 7 sealed.

[0020] In another embodiment: Refer to Figures 1-3 Improvements based on Example 1: The noise reduction tube 6 is fixed inside the noise reduction cover of the punch press and is securely installed by welding or bolting to prevent shaking or displacement during the operation of the punch press, which would affect the noise reduction effect. The noise reduction tube 6 is made up of four noise reduction plates spliced ​​together. This splicing structure is easy to install and disassemble, and convenient for subsequent maintenance and replacement. Each noise reduction panel has a multi-layer structure from the outside to the inside, with each layer playing a different role to achieve efficient noise reduction. The outer protective sound insulation layer 1 is made of 2mm thick galvanized steel sheet. Galvanized steel sheet has good strength and corrosion resistance, which can effectively resist the erosion of the external environment and protect the internal structure. During the manufacturing process, the surface of the outer protective sound insulation layer 1 is degreased. Specifically, the surface is wiped with an alkaline cleaning agent to remove oil stains, and then rinsed with water until neutral to avoid oil stains affecting the subsequent bonding of the low-frequency damping layer 2. The low-frequency damping layer 2 is made of 2mm thick low-frequency damping felt and is bonded to the outer protective sound insulation layer 1 with epoxy resin. When bonding, it is necessary to ensure that the epoxy resin is applied evenly and without air bubbles to ensure that the two are tightly bonded, effectively suppressing the vibration of the board and reducing the noise caused by vibration. The rigid support sound insulation layer 3 is made of 12mm thick cement fiberboard with a density of 1.2g / cm³. Its size is consistent with that of the outer protective sound insulation layer 1, providing rigid support for the entire noise reduction board, enhancing the stability of the structure, and blocking noise at the same time. The sound-absorbing layer 4 is made of 48kg / m³ glass wool, using centrifugal glass wool material with a fiber diameter of 5-8μm and a porosity of ≥90%. The glass wool is filled between the rigid support sound insulation layer 3 and the inner sound-permeable protective layer 5 to form the sound-absorbing layer 4, which has a thickness of 100mm. During the filling process, it is ensured that the glass wool is tightly attached to the inner side of the rigid support sound insulation layer 3 without any loosening, so as to give full play to its sound wave absorption effect and reduce sound reflection. The inner sound-permeable protective layer 5 is made of 1mm thick galvanized perforated plate with a perforation rate of 15%, a hole diameter of 3mm, and a hole spacing of 8mm, arranged in a quincunx pattern. This perforation design not only ensures that sound can be smoothly transmitted to the sound-absorbing layer 4, but also protects the internal structure.

[0021] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0022] 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 equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A noise reduction linkage device for the discharge port of a punch press, characterized in that, include: Noise reduction tube (6), the noise reduction tube (6) is fixed inside the punch press noise reduction cover for noise reduction treatment of the punch press outlet. The noise reduction tube (6) is made up of four noise reduction plates spliced ​​together. Each noise reduction plate includes an outer protective sound insulation layer (1), a low frequency damping layer (2), a rigid support sound insulation layer (3), a sound absorption layer (4) and an inner sound-permeable protective layer (5) from the outside to the inside. In order to prevent dust accumulation when the punch is not in use, a cover plate (7) for sealing the noise reduction tube (6) is provided on the side end of the noise reduction tube (6). A first connecting plate (8) is welded and fixed on both sides of the noise reduction tube (6). A rotating shaft (12) is rotatably installed in both of the first connecting plates (8). The cover plate (7) is fixed between the two rotating shafts (12). A positioning component is provided between the cover plate (7) and the two first connecting plates (8). The positioning component is used to position the cover plate (7) when it is opened and closed.

2. The noise reduction and silencing linkage device for the discharge port of a punch press according to claim 1, characterized in that, The outer protective sound insulation layer (1) is made of 2mm thick galvanized steel plate, the low frequency damping layer (2) is made of 2mm thick low frequency damping felt, the rigid support sound insulation layer (3) is made of 12mm thick cement fiberboard, the rigid support sound insulation layer (3) and the outer protective sound insulation layer (1) have the same size, the sound absorption layer (4) is made of 48kg / m³ glass wool, the glass wool is filled between the rigid support sound insulation layer (3) and the inner sound-permeable protective layer (5) to form the sound absorption layer (4), the thickness of the sound absorption layer (4) is 100mm, and the inner sound-permeable protective layer (5) is made of 1mm thick galvanized perforated plate.

3. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 2, characterized in that, The surface of the outer protective sound insulation layer (1) is degreased to prevent oil stains from affecting the subsequent bonding of the low-frequency damping layer (2).

4. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 2, characterized in that, The low-frequency damping layer (2) is bonded to the outer protective sound insulation layer (1) with epoxy resin, without any air bubbles or gaps.

5. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 2, characterized in that, The density of cement fiberboard is 1.2 g / cm³.

6. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 2, characterized in that, The glass wool is made of centrifugal glass wool material with a fiber diameter of 5-8μm and a porosity of ≥90%. The glass wool is attached to the inner side of the rigid support sound insulation layer (3) to ensure that there is no loosening.

7. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 2, characterized in that, The galvanized perforated plate has a perforation rate of 15%, a hole diameter of 3mm, a hole spacing of 8mm, and is arranged in a quincunx pattern.

8. A noise reduction and silencing linkage device for the discharge port of a punch press according to any one of claims 1-7, characterized in that, The positioning component includes a slide groove (10) opened in the cover plate (7), a slide rod (11) sliding in the slide groove (10), a locking rod (9) fixed in the slide rod (11), and a closed positioning groove (17) and an open positioning groove (18) opened on the surfaces of the two first connecting plates (8). The locking rod (9) is alternately engaged with the corresponding two closed positioning grooves (17) and two open positioning grooves (18). Two connecting rods (13) are fixed at the bottom end of the slide rod (11). The two connecting rods (13) move through the bottom end of the cover plate (7). The bottom end of the two connecting rods (13) is fixed with the same second connecting plate (15). Springs (14) are sleeved on the surfaces of the two connecting rods (13). The two ends of the two springs (14) abut against the side ends of the cover plate (7) and the connecting plate (15) respectively. The second connecting plate (15) is pushed downward by the elasticity of the spring (14). The second connecting plate (15) drives the slide rod (11) and the locking rod (9) to move downward and lock into the closed positioning groove (17) or the open positioning groove (18). When the locking rod (9) is locked into the closed positioning groove (17), the cover plate (7) remains sealed. When the locking rod (9) is locked into the open positioning groove (18), the cover plate (7) remains open.

9. A noise reduction and silencing linkage device for the discharge port of a punch press according to claim 8, characterized in that, A handle (16) is fixed to the surface of the second connecting plate (15).

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