Punching machine with buffering effect

Abstract

The utility model provides a punch with buffer effect, include: frame, the frame top end is installed hydraulic cylinder, the telescopic end of hydraulic cylinder is fixedly connected with upper die holder, the lower side of upper die holder is provided with lower die holder, the protection department, two protection department are arranged respectively in frame front and back both ends, the position department, two position parts are arranged respectively in upper die holder's front and back both ends, the pre -press department, two pre -press parts are connected with two position parts respectively, and are respectively local intercalation two protection department, this punch with buffer effect is automatic closed frame under the drive of hydraulic cylinder through the protection department, prevents the splashing of debris and reduces the noise, and under the cooperation of dust removal part, forms the negative pressure airflow in the closed space, removes the dust and dirt of stamping, and under the cooperation of buffer part, through the shock vibration of multiple groups of damper and rubber pad absorption, prolongs the service life, guarantees the security, environmental protection and processing accuracy of this punch use.

Description

Technical Field

[0001] This utility model relates to the field of punch press technology, and more specifically, to a punch press with a buffering effect. Background Technology

[0002] A punch press is a stamping press. In national production, stamping technology has become increasingly widely used due to its advantages over traditional machining, such as saving materials and energy, high efficiency, low operator skill requirements, and the ability to produce products that cannot be achieved through machining by using various molds.

[0003] However, existing punch presses still have some defects or shortcomings in use:

[0004] Insufficient protective performance, most of them use fixed protective covers or manual switches. Workers may ignore their use due to the cumbersome operation, which may lead to accidents such as flying debris or mold breakage. In addition, the instantaneous noise during stamping is relatively large, which will affect the hearing health of workers in the long term.

[0005] The lack of dust removal design leads to the accumulation of metal or plastic stamping debris around the mold. If not handled promptly, this debris will accumulate on the processing platform, affecting the placement of workpieces and the processing operation. This necessitates manual shutdown for cleaning, which is inefficient. Some manufacturers use air jet equipment to blow debris away from the processing table surface, but this causes debris to scatter on the surrounding ground, requiring further cleaning and adding unnecessary trouble. Furthermore, the dust may pose a respiratory health hazard. Utility Model Content

[0006] The purpose of this invention is to provide a punch press with a buffering effect to solve the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides a punch press with a buffering effect, comprising: a frame, a hydraulic cylinder mounted on the top of the frame, an upper die holder fixedly connected to the telescopic end of the hydraulic cylinder, and a lower die holder disposed directly below the upper die holder;

[0008] The two protective sections are respectively located at the front and rear ends of the frame;

[0009] Adjustment parts, the two adjustment parts are respectively disposed at the front and rear ends of the upper mold base;

[0010] The two pre-compression sections are respectively connected to the two adjustment sections, and the two protective sections are partially inserted into each other.

[0011] A dust removal unit is mounted on the frame and partially interspersed with two of the protective units;

[0012] A buffer section is installed between the lower mold base and the frame, wherein:

[0013] The hydraulic cylinder controls the lower mold base to move downward, so that the two protective parts move downward synchronously, sealing the inside of the frame and simultaneously squeezing the two pre-compression parts;

[0014] The dust removal unit is used to extract dust from the frame when the frame is closed inside.

[0015] Furthermore, the protective part includes two limiting guide rails symmetrically fixed on the frame; a plurality of guide sliders symmetrically slidably mounted on the two guide rails; a lower pressure frame fixed to the plurality of guide sliders; two slide grooves symmetrically opened on the lower pressure frame; a protective plate that fits and slides between the two slide grooves; a shielding plate fixed to the upper end of the protective plate and corresponding to one of the adjustment parts; a strong magnetic block fixed to the upper end of the lower pressure frame and magnetically attracted to the shielding plate; and sound insulation cotton fixed to the side of the protective plate near the frame.

[0016] Furthermore, the pre-compression part includes a pre-compression sleeve disposed on the frame and movable at the upper end of the lower pressure frame; two guide rods symmetrically disposed on the pre-compression sleeve and both penetrating the lower pressure frame; and two return springs respectively movably sleeved outside the two guide rods and fixedly connected at both ends to the upper surface of the lower pressure frame and the inner wall of the pre-compression sleeve.

[0017] Furthermore, the adjusting part includes an assembly groove formed on the upper mold base for the pre-compression sleeve to move; an adjusting screw fixedly connected in the assembly groove and passing through the pre-compression sleeve; and an adjusting sleeve rotatably connected in the pre-compression sleeve and threadedly connected to the adjusting screw.

[0018] Both guide rods are fixedly connected in the assembly groove and both pass through the pre-compression sleeve.

[0019] Furthermore, the dust removal unit includes a dust collection hood and an air blowing hood respectively installed through the two protective plates, a bracket fixed to one side of the frame; a dust collection box and a dust removal fan installed on the bracket; a diversion pipe connected to the air blowing hood; a dust conveying hose with one end connected to the dust collection hood and the other end connected to the upper end of the dust collection box; an air conveying hose with one end connected to the diversion pipe and the other end connected to the air outlet of the dust removal fan; a dust collection tray slidably installed in the dust collection box; and a filter plate installed on the dust collection tray and corresponding to the dust removal fan.

[0020] The air inlet of the dust removal fan is connected to the dust collection box.

[0021] Furthermore, the buffer section includes a plurality of mounting slots formed in a rectangular array on the frame, a plurality of dampers respectively installed in the plurality of mounting slots and whose upper ends are fixedly connected to the lower mold base; a plurality of sliding sleeves respectively fixedly sleeved on the lower ends of the plurality of dampers, a plurality of upper sliding sleeves respectively fixedly sleeved on the upper ends of the plurality of dampers and respectively sleeved on the outside of the plurality of sliding sleeves; and a rubber pad fixed to the inner bottom of the frame and corresponding to the lower mold base.

[0022] Furthermore, the inner wall of the frame is fixed with several V-shaped guide rails in a rectangular array, and several guide pulleys that abut against the several V-shaped guide rails are installed on both sides of the upper mold base and the lower mold base.

[0023] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0024] This cushioning punch press, through the cooperation of the protective and adjusting sections, ensures that the protective section is completely synchronized with the punching action, guaranteeing precise timing of the protective plate closing. The frame is closed before the upper and lower dies come into contact, avoiding delays or omissions caused by manual operation in traditional solutions. It completely eliminates the risk of hands accidentally entering the danger zone and allows for operation within a closed space, preventing metal or plastic debris from splashing around the frame and scratching operators or contaminating surrounding equipment. At the same time, with the cooperation of the pre-pressing section, the initial impact is cushioned, reducing the transmission of structural vibration. The sound insulation cotton in the protective section absorbs high-frequency noise, forming a double noise reduction, effectively reducing the noise during the punching process.

[0025] This punch press with a buffer effect works in conjunction with a protective section and a dust removal section. When the protective plates of the two protective sections are closed, a sealed space is formed inside the frame. At this time, the dust collection hood and the air blowing hood of the dust removal section automatically align and start negative pressure adsorption. The dust removal fan extracts the debris in the sealed space through the dust conveying hose, while the air blowing hood sprays air to blow the residual debris toward the dust collection hood, ensuring thorough cleaning without dead corners, avoiding the spread of pollution, preventing workers from being exposed to metal dust for a long time, reducing occupational health risks, ensuring the safety of the processing environment, preventing dust explosions, reducing mold wear, ensuring product quality, and simultaneously cleaning debris during the stamping process without the need for manual shutdown to clean debris, reducing manual cleaning time and improving equipment utilization.

[0026] This punch press with a buffering effect first buffers the impact by using a pre-compression section. When the upper die holder moves downward, the adjusting screw first presses the pre-compression sleeve, compressing the return spring and consuming some of the impact energy in advance, thus avoiding the hydraulic cylinder bearing instantaneous peak load. Then, the buffer section takes over the energy dissipation. When the spring is compressed to its limit, the impact force is transmitted to the lower die holder, triggering the axial movement of the damper for further buffering. Finally, the rubber pad absorbs the high-frequency residual vibration of the lower die holder at the end of the punching process and contacts and suppresses the frame resonance, effectively reducing the instantaneous pressure on the hydraulic cylinder and the frame, significantly reducing the risk of structural deformation, and ensuring service life. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 A perspective view of the present invention is shown;

[0029] Figure 2 A partial front view of the present invention is shown;

[0030] Figure 3 A partial three-dimensional representation of the present invention is shown. Figure 1 ;

[0031] Figure 4 This invention demonstrates a partially disassembled three-dimensional representation. Figure 1 ;

[0032] Figure 5 A partial three-dimensional representation of the present invention is shown. Figure 2 ;

[0033] Figure 6 A partial cross-sectional perspective view of this utility model is shown;

[0034] Figure 7 This invention demonstrates a partially disassembled three-dimensional representation. Figure 2 .

[0035] In the picture

[0036] 1. Frame; 2. Hydraulic cylinder; 3. Upper mold base; 4. Lower mold base; 5. Protective section; 6. Adjustment section; 7. Pre-compression section; 8. Dust removal section; 9. Buffer section; 10. Limiting guide rail; 11. Guide slider; 12. Lower pressure frame; 13. Slide groove; 14. Protective plate; 15. Shielding plate; 16. Strong magnetic block; 17. Sound insulation cotton; 18. Pre-compression sleeve; 19. Guide rod; 20. Return spring; 21. 21. Assembly slot; 22. Adjusting screw; 23. Adjusting sleeve; 24. Dust collection hood; 25. Air blowing hood; 26. Bracket; 27. Dust collection box; 28. Dust removal fan; 29. ​​Diverter pipe; 30. Dust conveying hose; 31. Air conveying hose; 32. Dust collection drawer; 33. Filter plate; 34. Mounting slot; 35. Damper; 36. Sliding sleeve; 37. Rubber pad; 38. V-shaped guide rail; 39. Guide pulley. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0038] like Figure 1-7 As shown, a punch press with a buffering effect includes: a frame 1, a hydraulic cylinder 2 installed at the top of the frame 1, an upper die holder 3 fixedly connected to the telescopic end of the hydraulic cylinder 2, and a lower die holder 4 disposed directly below the upper die holder 3;

[0039] Protective parts 5, two of the protective parts 5 are respectively disposed at the front and rear ends of the frame 1;

[0040] Adjustment part 6, the two adjustment parts are respectively disposed at the front and rear ends of the upper mold base 3;

[0041] The two pre-compression parts 7 are respectively connected to the two adjustment parts, and the two protective parts 5 are partially inserted into each other.

[0042] Dust removal unit 8 is installed on the frame 1 and two of the protective units 5 are partially inserted therethrough;

[0043] Buffer section 9, wherein the buffer section 9 is installed between the lower mold base 4 and the frame 1, wherein:

[0044] The hydraulic cylinder 2 controls the lower mold base 4 to move downward, so that the two protective parts 5 move downward synchronously, sealing the inside of the frame 1 and simultaneously squeezing the two pre-compression parts 7;

[0045] The dust removal unit 8 is used to extract dust and debris from the frame 1 when the frame 1 is closed inside.

[0046] In use, the hydraulic cylinder 2 acts as the main force source, pushing the upper die seat 3 vertically downwards to approach the lower die seat 4 for stamping. As the upper die seat 3 moves downwards, the screw drive of the adjusting part 6 forces the lower pressing frame 12 of the two protective parts 5 to move synchronously downwards along the limit guide rail 10, thereby closing the two protective plates 14 in the two protective parts 5 to seal the machining position of the machine body. This ensures that the sealing is completed before the upper and lower dies contact, avoiding delays or omissions caused by manual operation in traditional solutions, completely eliminating the risk of hands accidentally entering the danger zone, and effectively preventing metal or plastic debris from splashing around the frame 1, preventing scratches to operators or contamination of surrounding equipment. At the same time, when the protective part 5 moves downwards, it squeezes the return spring 20 of the pre-pressing part 7, consuming some of the impact energy in advance. Combined with the sound insulation cotton 17 of the protective part 5, it effectively absorbs high-frequency noise, forming a double noise reduction and effectively reducing the noise during stamping. When the upper and lower dies contact subsequently, the impact force is transmitted to multiple dampers 35 in the buffer part 9, which, together with the upper and lower sliding sleeves 36, effectively absorb high-frequency noise. Compared to sliding friction, energy consumption is further buffered, and the residual vibration is finally absorbed by the elasticity of the rubber pad 37, significantly improving the impact resistance, accuracy retention, and equipment life of the punch press, ensuring the safety and reliability of the machine tool; when the upper die holder 3 and the lower die holder 4 move, the V-shaped guide rail 38 and the guide pulley 39 ensure that the vertical movement of the die holder is free from off-center load; and after the protective plate 14 is closed, the dust removal fan 28 is started, and the airflow is sprayed out from the blowing hood 25, carrying the debris through the dust collection hood 24 into the dust collection box 27. After being filtered by the filter plate 33, the clean gas is then transported to the blowing hood 25 to achieve closed-loop cleaning, achieving cleaning without dead corners during processing, avoiding dust and debris diffusion and pollution, preventing workers from being exposed to the metal dust environment for a long time, ensuring the safety of the processing environment, preventing dust explosions, reducing die wear, ensuring product quality, and simultaneously cleaning debris during the stamping process without the need for manual machine stoppage for debris cleaning, reducing manual cleaning time, improving equipment utilization, and ensuring high safety, precision, efficiency, and environmental protection during machine tool operation.

[0047] Optionally, the protective part 5 includes two limiting guide rails 10 symmetrically fixed on the frame 1; a plurality of guide sliders 11 symmetrically slidably mounted on the two guide rails; a lower pressure frame 12 fixed to the plurality of guide sliders 11; two sliding grooves 13 symmetrically opened on the lower pressure frame 12; a protective plate 14 that fits and slides between the two sliding grooves 13; a shielding plate 15 fixed to the upper end of the protective plate 14 and corresponding to one of the adjusting parts 6; a strong magnetic block 16 fixed to the upper end of the lower pressure frame 12 and magnetically attracted to the shielding plate 15; and sound insulation cotton 17 fixed to the side of the protective plate 14 near the frame 1.

[0048] When the hydraulic cylinder 2 drives the upper mold base 3 to move downward, the adjusting part 6 synchronously drives the lower pressure frame 12 of the protective part 5 to slide downward. The lower pressure frame 12 moves downward steadily along the limit guide rail 10 through the guide slider 11, ensuring accurate movement trajectory and realizing fully automatic enclosure of the processing area of ​​the frame 1. This prevents metal chips from splashing and damaging the precision mold, avoids injury from fragments, and keeps synchronized with the stamping action to eliminate human negligence. With the cooperation of the pre-pressing part 7, the enclosure is completed before stamping, ensuring that the sound insulation cotton 17 can effectively reduce the noise pollution of stamping. When the protective plate 14 moves, it can maintain the... The shielding at the adjustment section 6 prevents foreign objects from entering the assembly slot 21 and affecting the adjustment accuracy, reduces the frequency of cleaning the adjustment section 6, and lowers maintenance costs. At the same time, during use, the shielding plate drives the protective plate 14 to slide vertically on the lower pressure frame 12 and is quickly connected by a strong magnet, which facilitates the quick assembly and disassembly of the protective plate 14. When needed, the protective plate 14 can be lifted directly to detach it from the lower pressure frame 12, exposing the upper mold base 3 and the adjustment section 6, allowing for quick replacement of the mold on the upper mold base 3 and control of the adjustment section 6, making it convenient to use.

[0049] Optionally, the pre-compression part 7 includes a pre-compression sleeve 18 disposed on the frame 1 and movable at the upper end of the lower pressure frame 12; two guide rods 19 symmetrically disposed on the pre-compression sleeve 18 and both penetrating the lower pressure frame 12; and two return springs 20 respectively movably sleeved on the outside of the two guide rods 19 and fixedly connected at both ends to the upper surface of the lower pressure frame 12 and the inner wall of the pre-compression sleeve 18.

[0050] Before stamping, the upper die holder 3 is in a high position, the lower pressure frame 12 of the protective part 5 is not compressed, and the pre-pressure sleeve 18 and the return spring 20 are in a naturally extended state. When stamping starts, the hydraulic cylinder 2 pushes the upper die holder 3 downward, and at the same time drives the adjusting screw 22 of the adjusting part 6 to press down the pre-pressure sleeve 18. When the pre-pressure sleeve 18 moves down, it compresses the two return springs 20. The springs generate a reverse force, absorbing part of the impact energy and forming a pre-buffer. Together with the rubber pad 37, it buffers the downward movement of the lower pressure frame 12, absorbs part of the downward pressure of the hydraulic cylinder 2, reduces the instantaneous load on the equipment, and effectively extends the lifespan. The hydraulic system has a longer lifespan and reduces noise from direct metal-to-metal collisions. Sound insulation cotton 17 further reduces noise. Guide rod 19 restricts the movement trajectory of preload sleeve 18, ensuring its vertical movement and preventing spring deflection. This ensures the preload sleeve 18 moves vertically, reducing mechanical wear. As the preload sleeve 18 continues to move downwards, it pushes the lower pressure frame 12 to slide along the limit guide rail 10, causing the protective plate 14 to close the frame 1, forming a closed space. The compression force of the return spring 20 ensures the protective plate 14 fits tightly against the frame 1, preventing loosening due to vibration during stamping and improving safety.

[0051] Optionally, the adjusting part 6 includes an assembly groove 21 formed on the upper mold base 3 for the pre-compression sleeve 18 to move; an adjusting screw 22 fixedly connected in the assembly groove 21 and passing through the pre-compression sleeve 18; and an adjusting sleeve 23 rotatably connected in the pre-compression sleeve 18 and threadedly connected to the adjusting screw 22.

[0052] Both guide rods 19 are fixedly connected in the assembly groove 21 and both pass through the pre-compression sleeve 18;

[0053] The rotating adjusting sleeve 23 drives the pre-compression sleeve 18 to move up and down along the adjusting screw 22, changing the initial height of the pre-compression part 7, so that the closing height of the protective plate 14 changes accordingly, adapting to the stamping requirements of molds with different thicknesses, ensuring that the protective plate 14 and the frame 1 are tightly closed, preventing debris from splashing. The two adjusting parts 6 are distributed at the front and rear ends of the upper mold base 3. By synchronously rotating the adjusting sleeve 23, the closing height of the protective plates 14 on both sides is ensured to be consistent, avoiding gaps on one side. Furthermore, by adjusting the height of the pre-compression sleeve 18, the pre-compression amount of the return spring 20 can be changed, thereby controlling the buffering force when the protective plate 14 is closed, avoiding overload impact. The pre-compression sleeve 18 slides along the two fixed guide rods 19 to avoid rotational deviation, ensure linear motion accuracy, and avoid jamming. After long-term use, when the spring fatigue leads to insufficient pre-compression, the height can be compensated by the adjusting part 6 to restore the protective function without replacing the spring, thus extending the service life.

[0054] Optionally, the dust removal unit 8 includes a dust collection hood 24 and an air blowing hood 25 respectively installed through the two protective plates 14, a bracket 26 fixed to one side of the frame 1; a dust collection box 27 and a dust removal fan 28 installed on the bracket 26; a diversion pipe 29 connected to the air blowing hood 25; a dust conveying hose 30 with one end connected to the dust collection hood 24 and the other end connected to the upper end of the dust collection box 27; an air conveying hose 31 with one end connected to the diversion pipe 29 and the other end connected to the air outlet of the dust removal fan 28; a dust collection tray 32 slidably installed in the dust collection box 27; and a filter plate 33 installed on the dust collection tray 32 and corresponding to the dust removal fan 28.

[0055] The air inlet of the dust removal fan 28 is connected to the dust collection box 27. When the two protective plates 14 close the frame 1, the fan draws air to create a negative pressure inside the dust collection box 27. The dust particles are drawn into the dust collection box 27 through the dust collection hood 24 and the dust conveying hose 30. After being intercepted by the filter plate 33, they fall into the dust collection tray 32. Clean air is discharged by the fan and forms a high-speed airflow through the air conveying hose 31, the diversion pipe 29 and the blowing hood 25. This airflow is sprayed onto the stamping area, raising the debris and blowing it in a direction toward the dust collection hood 24. The airflow is then automatically aligned to form a closed air duct, ensuring that the airflow is concentrated on the processing area. This ensures the dust removal effect on the stamping processing area, achieves the directional collection of dust particles during the stamping process, avoids the spread of pollution, prevents workers from being exposed to metal dust for a long time, reduces occupational health risks, ensures the safety of the processing environment, prevents dust explosions, reduces mold wear, and ensures product quality. At the same time, debris can be cleaned simultaneously during the stamping process without the need for manual shutdown to clean debris, reducing manual cleaning time and improving equipment utilization.

[0056] The filter plate 33 adopts a multi-layer metal mesh combined with a non-woven fabric composite structure to intercept particles of different sizes. The dust collection drawer 32 is a pull-out design, which can be quickly replaced when fully loaded, reducing the number of maintenance times.

[0057] Optionally, the buffer section 9 includes a plurality of mounting slots 34 arranged in a rectangular array on the frame 1, a plurality of dampers 35 respectively installed in the plurality of mounting slots 34 and whose upper ends are fixedly connected to the lower mold base 4; a plurality of sliding sleeves 36 respectively fixedly sleeved on the lower ends of the plurality of dampers 35, a plurality of upper sliding sleeves respectively fixedly sleeved on the upper ends of the plurality of dampers 35 and respectively sleeved on the outside of the plurality of sliding sleeves 36; and a rubber pad 37 fixed to the inner bottom end of the frame 1 and corresponding to the lower mold base 4. When the upper mold base 3 impacts the lower mold base 4, the lower mold base 4 moves downward after being compressed, pushing the piston rods of the plurality of dampers 35 to compress the internal fluid, performing initial buffering. The multiple dampers 35 distributed in a rectangular array evenly distribute the load, avoiding To prevent single-point overload, the upper sliding sleeve moves down with the piston rod of the damper 35, generating relative sliding friction with the fixed lower sliding sleeve 36 for secondary buffering. This also prevents the damper 35 from swaying, ensuring vertical force application and preventing dust from affecting the normal compression of the spring in the damper 35. The residual impact force is then transferred to the rubber pad 37 at the bottom of the frame 1, where the high elastic deformation of the rubber absorbs high-frequency vibrations for further buffering and reducing impact noise. Kinetic energy is dissipated through fluid damping, mechanical friction, and elastic deformation, adapting to different impact intensities and maintaining stability. This significantly improves the impact resistance, accuracy retention, and lifespan of the punch press, ensuring the safety and reliability of the machine tool. Furthermore, if a single damper 35 is damaged, the lower die base 4 can be lifted for quick replacement, reducing maintenance costs.

[0058] Optionally, the inner wall of the frame 1 is fixed with a number of V-shaped guide rails 38 in a rectangular array, and the upper mold base 3 and the lower mold base 4 are each equipped with a number of guide pulleys 39 that abut against the number of V-shaped guide rails 38.

[0059] The guide pulley 39 rolls along the V-shaped guide rail 38, constraining the range of motion of the upper die holder 3 and the lower die holder 4. The V-shaped inclined surface automatically corrects the offset of the upper die holder 3 and the lower die holder 4, so that the upper die holder 3 and the lower die holder 4 only move vertically, effectively reducing the movement error and ensuring stamping accuracy. The rolling of the guide pulley 39 on the V-shaped guide rail 38 can improve the service life compared to the movement of the traditional slider.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A punch press having a cushioning effect, characterized by comprising: include: A frame (1) is provided with a hydraulic cylinder (2) installed at the top of the frame (1). The telescopic end of the hydraulic cylinder (2) is fixedly connected to an upper mold base (3). A lower mold base (4) is provided directly below the upper mold base (3). Protective parts (5), the two protective parts (5) are respectively disposed at the front and rear ends of the frame (1); Adjustment part (6), the two adjustment parts are respectively disposed at the front and rear ends of the upper mold base (3); The two pre-compression parts (7) are respectively connected to the two adjustment parts and are partially inserted into the two protective parts (5). Dust removal unit (8), the dust removal unit (8) is installed on the frame (1) and partially interspersed with two of the protective units (5); A buffer section (9) is installed between the lower mold base (4) and the frame (1), wherein: The hydraulic cylinder (2) controls the lower mold base (4) to move down, so that the two protective parts (5) move down synchronously, sealing the inside of the frame (1) and simultaneously squeezing the two pre-compression parts (7). The dust removal unit (8) is used to extract dust from the frame (1) when the frame (1) is closed inside.

2. A punch press with a buffering effect as described in claim 1, characterized in that, The protective part (5) includes two limiting guide rails (10) symmetrically fixed on the frame (1); a plurality of guide sliders (11) symmetrically slidably mounted on the two guide rails; a lower pressure frame (12) fixed to the plurality of guide sliders (11); two slide grooves (13) symmetrically opened on the lower pressure frame (12); a protective plate (14) fitted and slidably inserted between the two slide grooves (13); a shielding plate (15) fixed to the upper end of the protective plate (14) and corresponding to one of the adjustment parts (6); a strong magnet (16) fixed to the upper end of the lower pressure frame (12) and magnetically attracted to the shielding plate (15); and sound insulation cotton (17) fixed to the side of the protective plate (14) near the frame (1).

3. A punch press with a buffering effect as described in claim 2, characterized in that, The pre-compression part (7) includes a pre-compression sleeve (18) disposed on the frame (1) and movable at the upper end of the lower pressure frame (12); two guide rods (19) symmetrically disposed on the pre-compression sleeve (18) and both penetrating the lower pressure frame (12); and two return springs (20) respectively movably sleeved on the outside of the two guide rods (19) and fixedly connected at both ends to the upper surface of the lower pressure frame (12) and the inner wall of the pre-compression sleeve (18).

4. A punch press with a buffering effect as described in claim 3, characterized in that, The adjusting part (6) includes an assembly groove (21) opened on the upper mold base (3) for the pre-pressure sleeve (18) to move; an adjusting screw (22) fixedly connected in the assembly groove (21) and passing through the pre-pressure sleeve (18); and an adjusting sleeve (23) rotatably connected in the pre-pressure sleeve (18) and threadedly connected to the adjusting screw (22). Both guide rods (19) are fixedly connected in the assembly groove (21) and both pass through the preload sleeve (18).

5. A punch press with a buffering effect as described in claim 4, characterized in that, The dust removal unit (8) includes a dust collection hood (24) and an air blowing hood (25) respectively installed through the two protective plates (14), a bracket (26) fixed to one side of the frame (1); a dust collection box (27) and a dust removal fan (28) installed on the bracket (26); a diversion pipe (29) connected to the air blowing hood (25); a dust conveying hose (30) with one end connected to the dust collection hood (24) and the other end connected to the upper end of the dust collection box (27); an air conveying hose (31) with one end connected to the diversion pipe (29) and the other end connected to the air outlet of the dust removal fan (28); a dust collection tray (32) slidably installed in the dust collection box (27); and a filter plate (33) installed on the dust collection tray (32) and corresponding to the dust removal fan (28). The air inlet of the dust removal fan (28) is connected to the dust collection box (27).

6. A punch press with a buffering effect as described in claim 1, characterized in that, The buffer section (9) includes a plurality of mounting slots (34) arranged in a rectangular array on the frame (1), a plurality of dampers (35) installed in the plurality of mounting slots (34) and whose upper ends are fixedly connected to the lower mold base (4); a plurality of sliding sleeves (36) fixedly sleeved on the lower ends of the plurality of dampers (35), a plurality of upper sliding sleeves fixedly sleeved on the upper ends of the plurality of dampers (35) and sleeved on the outside of the plurality of sliding sleeves (36); and a rubber pad (37) fixed at the bottom of the frame (1) and corresponding to the lower mold base (4).

7. A punch press with a buffering effect as described in claim 6, characterized in that, The inner wall of the frame (1) is fixed with a rectangular array of several V-shaped guide rails (38), and both sides of the upper mold base (3) and the lower mold base (4) are equipped with several guide pulleys (39) that abut against the several V-shaped guide rails (38).

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