Punching and shearing machine with noise reduction function

Abstract

The invention relates to the technical field of punching and shearing machines, in particular to a punching and shearing machine with a noise reduction function, which comprises a rack, a worktable is arranged on the top surface of the rack, a conveying mechanism is arranged in the middle of the worktable, and the conveying mechanism comprises a driving motor fixedly mounted on the worktable and a conveying belt arranged on the driving motor; the supporting frames are fixedly installed on the two sides of the top face of the workbench, a transverse frame is arranged between the middles of the two supporting frames, a hydraulic cylinder is movably connected to the transverse frame, and the shell is arranged on the outer wall of one side of each supporting frame. By means of the shell and the sealing plate elastically connected to the shell, in the actual punching and shearing process, the punching and shearing position can be effectively sealed, noise is prevented from overflowing, and the service life of the punching and shearing machine is prolonged. Meanwhile, a sponge plate arranged on the inner wall of the shell and a wavy sealing belt arranged on the side wall of the supporting plate are matched, so that noise can be effectively reduced when the noise is generated.

Description

Technical Field

[0001] The present invention relates to the field of punching and shearing machines, in particular to a punching and shearing machine with a noise reduction function. Background Art

[0002] Punching and shearing machines are a vital piece of industrial machinery, primarily used for processing various types of sheet metal and other workpieces. They are widely used in the automotive, machinery, electronics, construction, and other industries, manufacturing automotive parts, electronic devices, and building materials. Their structure is very simple, consisting of a press and a worktable, equipped with a set of cutting blades and positioning pins, enabling precise cutting, drilling, and other operations on the workpiece.

[0003] During the actual use of the punching and shearing machine, the corresponding cutter will directly contact the workpiece and use the impact force of the cutter to cut the workpiece. During this process, the corresponding cutter will directly contact the outer wall of the workpiece and cause the workpiece to deform. When the punching and shearing is completed, the corresponding workpiece will recover and vibrate, thereby generating noise. The punching and shearing machine is often an assembly line operation, which will generate greater noise pollution during the actual production process. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a punching and shearing machine with a noise reduction function, which can effectively solve the problem that in the actual use of the prior art punching and shearing machine, the corresponding cutter will directly contact the workpiece and use the impact force of the cutter to cut the workpiece. During this process, the corresponding cutter will directly contact the outer wall of the workpiece and cause the workpiece to deform. When the punching and shearing is completed, the corresponding workpiece will restore vibration and generate noise. The punching and shearing machine is often an assembly line operation, which will cause greater noise pollution during the actual production process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A punching and shearing machine with a noise reduction function comprises a frame, a workbench is provided on the top surface of the frame, a conveying mechanism is provided in the middle of the workbench, the conveying mechanism comprises a driving motor fixedly mounted on the workbench, and a conveyor belt provided on the driving motor;

[0007] It also includes support frames fixedly mounted on both sides of the top surface of the workbench, a cross frame is provided between the two support frames, a hydraulic cylinder is movably connected to the cross frame, and a shell is provided on the outer wall of one side of the support frame, a notch is provided at the lower end of the shell at the position of the conveyor belt, and a sponge plate is provided on the outer wall of the shell near the hydraulic cylinder;

[0008] The upper side of the shell is internally provided with a cavity, the lower side of the shell is movably connected with a sealing plate at a notch position, and the upper end of the sealing plate is elastically connected with the inner wall of the shell through a capsule, and the capsule is in communication with the cavity through a connecting hole; when the capsule is compressed, the gas in the capsule can enter the cavity through the connecting hole, and the sponge plate is expanded.

[0009] Preferably, the top surface of the workbench is provided with two limiting frames, the conveying belt is arranged between the two limiting frames, and the top surface of the conveying belt is linearly and equidistantly provided with a plurality of mounting grooves, and a through groove is formed through the mounting grooves.

[0010] Preferably, the workbench further comprises a supporting plate fixedly installed between the two limiting frames, and the size of the supporting plate is matched with the size of the through groove.

[0011] Preferably, the output end of the hydraulic cylinder is fixedly installed with a punching shear, and the size of the punching shear is smaller than the size of the through groove.

[0012] Preferably, the workbench further comprises a lead screw fixedly installed at the middle position of the horizontal frame, and the upper end of the hydraulic cylinder is fixedly installed with a fixed block, and the fixed block is in meshing connection with the lead screw, so that the position of the hydraulic cylinder can be adjusted in the horizontal direction when the lead screw rotates.

[0013] Preferably, when the lower end of the sealing plate is in contact with the copper plate on the conveying belt, the capsule is compressed, and the sponge plate is a part of the inner wall of the cavity close to the hydraulic cylinder.

[0014] Preferably, the outer wall of the sponge plate is provided with a plurality of sponge columns, and the plurality of sponge columns are located at the two sides of the hydraulic cylinder.

[0015] Preferably, the lower end of the sealing plate is provided with an overlapping layer on the outer wall, the cross section of the overlapping layer is in a wave shape, and a sealing strip is arranged on the side wall of the supporting frame.

[0016] Preferably, the workbench further comprises a connecting plate fixedly installed on the outer wall of one side of the workbench, a rotating shaft is rotatably connected to the connecting plate, two overlapping plates are symmetrically arranged on the rotating shaft, and the overlapping plates are arranged in an inclined structure.

[0017] Preferably, the lower end of the overlapping plate is overlapped with the top outer wall of the conveying belt, a coil spring is sleeved on the outer end of the rotating shaft, a clamping sleeve is fixedly installed on the outer wall of the connecting plate, and the other end of the coil spring is fixedly connected with the inner wall of the clamping sleeve.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The shell and the sealing plate elastically connected to the shell are arranged, in the actual punching and shearing process, the punching and shearing position can be effectively sealed, the overflow of noise is prevented, and the sponge plate arranged on the inner wall of the shell is cooperated, when the sealing plate is synchronously moved upwards along with the conveying belt, the capsule is compressed, the gas in the capsule enters the cavity through the connecting hole, when the cavity is filled with the gas, the internal pressure is increased, the sponge plate is expanded, the sound absorption effect of the sponge plate is utilized, and sufficient noise reduction is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0021] Figure 1 It is an overall structure schematic diagram of the punching and shearing machine in an embodiment of the present application.

[0022] Figure 2 It is an overall front view structure schematic diagram of the punching and shearing machine.

[0023] Figure 3 It is an overall structure schematic diagram of the punching and shearing machine.

[0024] Figure 4 It is an overall explosion structure schematic diagram of the punching and shearing machine.

[0025] Figure 5 It is an explosion structure schematic diagram of the shell.

[0026] Figure 6 It is a bottom view structure schematic diagram of the support frame.

[0027] Figure 7 It is an explosion structure schematic diagram of the workbench.

[0028] Figure 8 It is an explosion structure schematic diagram of the rotating shaft.

[0029] FIG. NO. EXPLANATION:

[0030] 100, rack; 110, workbench; 120, limiting frame; 121, bearing plate; 130, connecting plate; 131, clamping sleeve; 140, rotating shaft; 141, lap plate; 142, coil spring;

[0031] 200, support frame; 210, cross frame; 220, lead screw; 230, sealing belt;

[0032] 300, hydraulic cylinder; 310, punching shear;

[0033] 400, housing; 401, notch; 410, sponge plate; 420, sealing plate; 430, capsule;

[0034] 500, driving motor; 510, conveying belt; 511, mounting groove; 512, through groove. DETAILED DESCRIPTION

[0035] The present application will be further described by examples with reference to the accompanying drawings.

[0036] The following description is provided so as to enable those skilled in the art to carry out the present application. The preferred embodiments illustrated in the following description are only examples of implementing the present application and variously modified examples, equivalents and alternatives to the present application can be made by those skilled in the art in light of the overall disclosure. The overall scope of the present application is defined only by the appended claims.

[0037] Those skilled in the art will understand that, in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of the simplified description of the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0038] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation of the number.

[0039] Referring to the drawings Figures 1-8As shown in the middle, an embodiment of the present application provides a punching shear with noise reduction function, including rack 100, set rack 100 for effective support to the workbench 110 and the punching shear mechanism set in the upper side position of workbench 110, the top surface of rack 100 is provided with workbench 110, the top surface of workbench 110 is provided with limiting frame 120, limiting frame 120 is provided with two groups, and respectively located in both sides of the conveying belt 510, the middle part of workbench 110 is provided with conveying mechanism, which can realize effective conveying of copper plate to be punched and sheared, specifically, the conveying mechanism includes driving motor 500 fixedly installed on workbench 110, and conveying belt 510 provided on driving motor 500; in actual punching and shearing operation, the copper plate to be punched and sheared is placed on the upper side of the conveying belt 510, the driving motor 500 is used to drive the conveying belt 510 to move, so that the copper plates placed on the top surface of the conveying belt 510 can be conveyed to the punching and shearing station in turn to realize subsequent punching and shearing processing.

[0040] Specifically, the above-mentioned copper plate is a plate structure with certain size, the conveying belt 510 is arranged in the middle part of the two limiting frames 120, and the top surface of the conveying belt 510 is linearly and equidistantly provided with a plurality of mounting grooves 511, and the through groove 512 is penetrated in the mounting groove 511. The size of the copper plate corresponds to the size of the mounting groove 511 provided on the conveying belt 510, and the above-mentioned conveying belt 510 is made of rubber material, which can realize stable conveying of the copper plate by driving motor 500, and the driving motor 500 is a servo motor, which can realize intermittent conveying of the conveying belt 510. In this way, the intermittent punching and shearing can be stably carried out. In particular, the through groove 512 is penetrated in the middle part of the mounting groove 511, and the size of the through groove 512 is larger than the shape profile of actual punching and shearing. In actual punching process, the output end of the hydraulic cylinder 300 is fixedly installed with the punching part 310, and the size of the punching part 310 is smaller than the size of the through groove 512. The punching part 310 fixedly installed at the lower end of the hydraulic cylinder 300 can pass through the through groove 512 and extend to the lower side of the conveying belt 510 to realize punching.

[0041] Further, in the actual punching and shearing, the corresponding conveying belt 510 ensures the stable transportation of the copper plate. Further, the application also includes a supporting plate 121 fixedly installed between the middle portions of the two limiting frames 120, and the size of the supporting plate 121 is matched with the size of the through groove 512. Specifically, as mentioned above, in the actual punching and shearing process, the punching and shearing part 310 fixedly installed at the output end position of the hydraulic cylinder 300 will extend to the lower side position of the conveying belt 510 to realize the punching and shearing of the copper plate. The bottom surface of the copper plate needs to be stably supported. However, the conveying belt 510 is made of rubber material, and cannot guarantee the stability of the copper plate during the punching and shearing process. Therefore, in the application, the supporting plate 121 is arranged between the middle portions of the two limiting frames 120. The significance of the arrangement is that, in the actual punching and shearing process, when the lower end outer wall of the punching and shearing part 310 contacts the outer wall of the copper plate and continuously moves downward, the corresponding conveying belt 510 will be deformed, and the corresponding copper plate will also move downward synchronously. In this process, the synchronous movement will be blocked by the supporting plate 121 and stably supported. Subsequently, as the hydraulic cylinder 300 continuously drives the punching and shearing part 310 to move downward, the punching and shearing part 310 can realize the punching and shearing of the copper plate.

[0042] When the punching and shearing is completed once, the hydraulic cylinder 300 drives the punching and shearing part 310 to reset. In this process, the conveying belt 510 will also reset under the action of its own elastic force. Subsequently, by using the re-operation of the driving motor 500, the copper plate that has been punched and sheared can be conveyed again, and the copper plate that has not been punched and sheared will be conveyed to the lower side position of the punching and shearing part 310 again for re-punching and shearing operation.

[0043] Further, the application also includes a supporting frame 200 fixedly installed at the top surface of the workbench 110. A cross frame 210 is arranged between the middle portions of the two supporting frames 200. The hydraulic cylinder 300 is movably connected to the cross frame 210. The output end of the hydraulic cylinder 300 is fixedly installed with the punching and shearing part 310. It should be noted that the punching and shearing part 310 mentioned in the application is a cutting knife with a certain shape. The structure is arranged to realize the downward movement of the cutting knife when the hydraulic cylinder 300 moves downward, so that the outer wall of the cutting knife contacts the outer wall of the copper plate. When the contact is completed, the cutting knife can realize the stable punching and shearing of the copper plate when the copper plate is stably supported.

[0044] Further, in the present application, the upper side of the workbench 110 is provided with a support frame 200, and further comprises a cross frame 210 arranged between the two support frames 200, which can be fixedly connected with the hydraulic cylinder 300 in the vertical direction and can be adjusted in position in the horizontal direction. By arranging in this way, the punching and shearing position of the punching and shearing piece 310 fixedly installed on the output end of the hydraulic cylinder 300 can be adjusted. In the actual punching and shearing process, by arranging in this way, it can meet the needs of punching and shearing multiple times at multiple positions on the same copper plate. For example, it needs to be punched and sheared multiple times at multiple positions on the surface of the copper plate in a linear arrangement. It needs to be noted that the linear arrangement direction is perpendicular to the conveying direction of the conveying belt 510. By adjusting the position of the hydraulic cylinder 300 in the horizontal direction, the position of the punching and shearing piece 310 can be adjusted synchronously. By adjusting the height of the output end of the hydraulic cylinder 300 multiple times, multiple punching and shearing of the copper plate can be realized.

[0045] In particular, the present application further comprises a lead screw 220 fixedly installed at the middle position of the cross frame 210, and a fixed block is fixedly installed at the upper end of the hydraulic cylinder 300, and the fixed block is in meshing connection with the lead screw 220. When the lead screw 220 rotates, the hydraulic cylinder 300 can be adjusted in position in the horizontal direction. As a way to adjust the position of the hydraulic cylinder 300 in the horizontal direction, in the present application, a lead screw 220 is arranged at the middle position of the cross frame 210, and the lead screw 220 is in meshing connection with a fixed block fixedly installed at the upper end of the hydraulic cylinder 300. Corresponding to the actual adjustment, by rotating the lead screw 220, including forward rotation and reverse rotation, and at the same time cooperating with the control of the number of revolutions of the lead screw 220, the position of the hydraulic cylinder 300 in the horizontal direction can be adjusted, and multiple punching and shearing of the copper plate can be realized by using the same punching and shearing piece 310 on the same hydraulic cylinder 300.

[0046] After the copper plate is punched and sheared, the hydraulic cylinder 300 will drive the punching and shearing piece 310 to move upward and reset. It needs to be noted that in the punching and shearing process, the conveying belt 510 will be pressed downward. Due to the elastic effect of the rubber material conveying belt 510 itself, the conveying belt 510 will vibrate in the reset stage, thereby causing the multiple copper plates placed in the mounting groove 511 to vibrate and generate noise. Therefore, in the present application, a connecting plate 130 is fixedly installed on one side of the outer wall of the workbench 110, a rotating shaft 140 is rotatably connected to the connecting plate 130, two clamping plates 141 are symmetrically arranged on the rotating shaft 140, the clamping plates 141 are arranged in an inclined structure, and the lower end of the clamping plate 141 is clamped with the top outer wall of the conveying belt 510. A coil spring 142 is sleeved on the outer end of the rotating shaft 140, a clamping sleeve 131 is fixedly installed on the outer wall of the connecting plate 130, and the other end of the coil spring 142 is fixedly connected with the inner wall of the clamping sleeve 131.

[0047] Specifically, in the present application, a connecting plate 130 is arranged at one side of the workbench 110, a rotating shaft 140 is rotatably connected to one side of the connecting plate 130 close to the conveying belt 510, and overlapping plates 141 are fixedly installed on the outer wall of the rotating shaft 140. The distance between the two overlapping plates 141 is greater than the width of the installation groove 511, and they do not contact the copper plate placed in the installation groove 511. First, the normal conveying of the conveying belt 510 can be ensured. In the above-mentioned punching and shearing reset stage, the overlapping plates 141 are still in contact with the conveying belt 510, and the overlapping plates 141 are arranged in an inclined state. In the reset stage of the conveying belt 510, an upward force is applied to the overlapping plates 141. In the present application, the overlapping plates 141 are fixedly connected to the rotating shaft 140, and the rotating shaft 140 and the connecting plate 130 are elastically connected by a coil spring 142. When the conveying belt 510 applies an external force to the overlapping plates 141 in the reset stage of the conveying belt 510, the rotating shaft 140 tends to reset. Due to the coil spring 142, the overlapping plates 141 also apply a downward external force to the conveying belt 510 at the same time. At this time, the conveying belt 510 does not vibrate when it is reset, but gradually resets. During this process, the copper plate placed in the installation groove 511 does not vibrate and produce noise due to the reset of the conveying belt 510, reducing the generation of noise.

[0048] At the same time, in the punching and shearing stage, the overlapping plates 141 and the conveying belt 510 are still in elastic contact. That is, the overlapping plates 141 apply an external force to the conveying belt 510 under the action of the coil spring 142. In the stage after punching and shearing is completed, the copper plate vibrates. Through the elastic contact relationship between the overlapping plates 141 and the conveying belt 510, the vibration of the conveying belt 510 in this link can be reduced, thereby reducing the generation of noise.

[0049] Regarding noise reduction, in the present application, a housing 400 is arranged on the outer wall of the support frame 200. The housing 400 is provided with a notch 401 at the position of the conveying belt 510, and a sponge plate 410 is arranged on the outer wall of the housing 400 close to the hydraulic cylinder 300. In the punching and shearing link, the punching and shearing part 310 will relatively displace with the copper plate, and drive the copper plate to vibrate and generate noise. In order to realize noise reduction, housings 400 are arranged on both sides of the punching and shearing station and on both sides of the support frame 200. The upper end of the housing 400 is provided with a sponge plate 410. When noise is generated, the sponge plate 410 can absorb noise and reduce the propagation speed of noise.

[0050] Further, in the present application, the lower side of the shell 400 is movably connected with the sealing plate 420 at the position of the gap 401, and the upper end of the sealing plate 420 is elastically connected with the inner wall of the shell 400 through the capsule 430, and when the lower end of the sealing plate 420 contacts the copper plate on the conveying belt 510, the corresponding capsule 430 will be compressed. In order to ensure the normal conveying of the copper plate by the conveying belt 510, in the present application, a gap 401 is provided in the middle of the lower side of the shell 400, the inner wall of the gap 401 does not contact the outer wall of the conveying belt 510, and the outer wall of the lower end of the sealing plate 420 elastically connected in the shell 400 elastically contacts the outer wall of the conveying belt 510. In the actual punching and shearing process, the shell 400 cooperated with the sealing plate 420 relatively seals the punching and shearing position, reducing the overflow of noise.

[0051] It should be noted that the depth of the vertical installation groove 511 is the same as the thickness of the copper plate, and it is understood that the top surface of the copper plate and the top surface of the conveying belt 510 are on the same horizontal plane, so that in the conveying link, even if the outer wall of the lower end of the sealing plate 420 contacts the copper plate or the outer wall of the conveying belt 510, the position of the copper plate will not change, ensuring the normal conveying of the copper plate by the conveying belt 510.

[0052] Further, the upper side of the shell 400 is internally provided with a cavity, the sponge plate 410 is a part of the inner wall of the cavity close to one side of the hydraulic cylinder 300, and the capsule 430 communicates with the cavity through the connecting hole. When the capsule 430 is compressed, the gas in the capsule 430 can enter the cavity through the connecting hole and make the sponge plate 410 expand. In the punching and shearing link, the conveying belt 510 will move downward, and the sealing plate 420 elastically connected in the shell 400 will also press the conveying belt 510 downward under the action of the capsule 430, thereby effectively sealing the punching and shearing space and preventing the noise generated in the punching and shearing process from overflowing outward. At the same time, in the end stage of the punching and shearing, the conveying belt 510 will recover, and the capsule 430 will be compressed at the same time. The noise generated in the punching and shearing link will be between the middle of the two supporting frames 200, and the sponge plate 410 provided on the outer wall of the shell 400 can realize sound absorption and noise reduction.

[0053] Among them, the outer wall of the sponge plate 410 is provided with a plurality of sponge columns, and the plurality of sponge columns are located at the two sides of the hydraulic cylinder 300. When the sealing plate 420 moves upward synchronously with the conveying belt 510, the capsule 430 will be compressed, and the gas in the capsule 430 will enter the cavity through the connecting hole. When the cavity is filled with gas, the internal pressure increases, thereby making the sponge plate 410 expand. The plurality of sponge columns laid on the outer wall of the sponge plate 410 can improve the sound absorption effect of the sponge plate 410, realizing sufficient noise reduction.

[0054] Further, in the present application, the lower end outer wall of the sealing plate 420 is provided with an overlapping layer, the cross section of the overlapping layer is wavy, and the side wall of the support frame 200 is provided with a sealing strip 230. The above-mentioned shell 400 is a protection device arranged on the left and right sides of the punching and shearing position. Corresponding to the front and rear sides of the punching and shearing position, the side wall of the support frame 200 is also provided with a sealing strip 230 in the present application. The sealing strip 230 is wavy. By arranging the wavy sealing strip 230, the shell 400 and the sponge plate 410 can be matched. At the same time, the noise generated during the punching and shearing process is reduced. In the present application, the lower side outer wall of the sealing plate 420 is provided with an overlapping layer. The so-called overlapping layer can be understood as a sponge block with a certain thickness. While ensuring the normal conveying of the conveying belt 510, the punching and shearing station can also be effectively sealed to achieve noise reduction.

[0055] It should be understood by those skilled in the art that the embodiments of the present application described above and shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application have been shown and described in the embodiments. Without departing from the principles, the embodiments of the present application can be modified or changed in any way.

Claims

1. A punching and shearing machine with noise reduction function, characterized in that: include: A frame (100), a workbench (110) is provided on the top surface of the frame (100), a conveying mechanism is provided in the middle of the workbench (110), and the conveying mechanism includes a driving motor (500) fixedly mounted on the workbench (110), and a conveying belt (510) provided on the driving motor (500); The machine further comprises support frames (200) fixedly mounted on both sides of the top surface of the workbench (110), a cross frame (210) being arranged between the two support frames (200), a hydraulic cylinder (300) being movably connected to the cross frame (210), and a shell (400) being arranged on an outer wall of one side of the support frame (200), a notch (401) being provided at the lower end of the shell (400) at the position of the conveyor belt (510), and a sponge plate (410) being arranged on the outer wall of the shell (400) on the side close to the hydraulic cylinder (300); A cavity is provided inside the upper side of the shell (400), and a sealing plate (420) is movably connected to the lower side of the shell (400) at the position of the notch (401), and the upper end of the sealing plate (420) is elastically connected to the inner wall of the shell (400) through the capsule (430), and the capsule (430) is kept in communication with the cavity through the connecting hole. When the capsule (430) is compressed, the gas in the corresponding capsule (430) can enter the cavity through the connecting hole and cause the sponge plate (410) to expand.

2. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: The top surface of the workbench (110) is provided with two limit frames (120), the conveyor belt (510) is arranged between the two limit frames (120), and the top surface of the conveyor belt (510) is linearly provided with a plurality of installation grooves (511) at equal intervals, and a through groove (512) is opened through the installation groove (511).

3. The punching and shearing machine with noise reduction function according to claim 2, characterized in that: It also includes a receiving plate (121) fixedly installed between the two limiting frames (120), and the size of the receiving plate (121) is adapted to the size of the through slot (512).

4. The punching and shearing machine with noise reduction function according to claim 2, characterized in that: A punching and shearing piece (310) is fixedly mounted on the output end of the hydraulic cylinder (300), and the size of the punching and shearing piece (310) is smaller than the size of the through-groove (512).

5. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: The invention also includes a screw rod (220) fixedly mounted in the middle of the horizontal frame (210); a fixed block is fixedly mounted on the upper end of the hydraulic cylinder (300); the fixed block is meshedly connected with the screw rod (220); when the screw rod (220) rotates, the position of the corresponding hydraulic cylinder (300) can be adjusted in the horizontal direction.

6. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: When the lower end of the sealing plate (420) contacts the copper plate on the conveyor belt (510), the corresponding capsule (430) will be compressed. The sponge plate (410) is a part of the inner wall of the cavity close to the hydraulic cylinder (300).

7. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: A plurality of sponge columns are provided on the outer wall of the sponge plate (410), and the plurality of sponge columns are located on both sides of the hydraulic cylinder (300).

8. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: An overlapping layer is provided on the outer wall of the lower end of the sealing plate (420), the cross section of the overlapping layer being wavy, and a sealing belt (230) is provided on the side wall of the support frame (200).

9. The punching and shearing machine with noise reduction function according to claim 1, characterized in that: The workbench (110) further comprises a connecting plate (130) fixedly mounted on an outer wall of one side of the workbench (110), wherein a rotating shaft (140) is rotatably connected to the connecting plate (130), and two lap plates (141) are symmetrically arranged on the rotating shaft (140), and the lap plates (141) are arranged in an inclined structure.

10. The punching and shearing machine with noise reduction function according to claim 9, characterized in that: The lower end of the lap plate (141) is overlapped with the outer wall of the top surface of the conveyor belt (510), the outer end of the rotating shaft (140) is sleeved with a coil spring (142), a clamping sleeve (131) is fixedly installed on the outer wall of the connecting plate (130), and the other end of the coil spring (142) is fixedly connected to the inner wall of the clamping sleeve (131).

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