A stamping device for small hardware parts

Abstract

The present invention relates to the technical field of hardware stamping, and in particular to a stamping device for small hardware, comprising an ejector assembly, wherein the ejector assembly comprises a mounting tube with through holes extending therethrough from top to bottom, the inner wall of the mounting tube being integrally formed with a separation ring to divide the interior of the mounting tube into two groups of upper and lower chambers, a push rod extending to the outside being slidably mounted inside one group of chambers, a first elastic member being elastically connected between the push rod and the separation ring, at least two groups of first connecting ports for expansion are provided on the periphery of the other group of chambers, one group of the first connecting ports being connected to a one-way valve device, and the other group of the first connecting ports being connected to a slow-release device or a pneumatic device. The stamping device for small hardware solves the shortcomings of the prior art that hardware is easily ejected and it is inconvenient to place the hardware.

Description

Technical Field

[0001] The invention relates to the technical field of hardware stamping, and in particular to a stamping device for small hardware. Background Art

[0002] In order to prevent small hardware from getting stuck on the die seat and being difficult to remove after stamping, in the prior art, an ejection mechanism is added to the die seat to eject the hardware after stamping, such as a stamping device for small hardware proposed in Chinese patent application number: "CN202123380400.4";

[0003] This type of ejection mechanism is pushed by spring elasticity to achieve the ejection effect, but the single spring structure makes it very easy to eject the hardware, making the operation inconvenient; and this structure makes the ejector rod in a naturally extended state, which is not convenient for the placement of hardware;

[0004] Based on the above-mentioned shortcomings of the prior art, this case proposes an ejection mechanism that can eject slowly and avoid flying hardware. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that hardware parts are easily knocked off and it is inconvenient to place the hardware parts, and to propose a punching device for small hardware parts.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A stamping device for small hardware is designed, including an ejection assembly, the ejection assembly includes a mounting tube with through holes extending therethrough from top to bottom, the inner wall of the mounting tube is integrally formed with a separation ring to divide the interior of the mounting tube into two groups of upper and lower chambers, a push rod extending to the outside is slidably installed inside one group of chambers, a first elastic member is elastically connected between the push rod and the separation ring, and at least two groups of first connecting ports for expansion are opened on the periphery of the other group of chambers, one group of the first connecting ports is connected to a one-way valve device, and the other group of the first connecting ports is connected to a slow-release device or a pneumatic device.

[0008] Preferably, the one-way valve device includes a first cavity with left and right openings, a partition plate is integrally formed inside the first cavity, a plurality of through holes are penetrated through the interior of the partition plate, a partition pad is movably inserted in the middle of the partition plate, and the transverse section of the partition pad is a "T"-shaped structure.

[0009] Preferably, the sustained-release device comprises a second cavity with an opening at the upper end, and a slender air release hole is formed through the lower end of the second cavity downwardly for gas circulation.

[0010] Preferably, the pneumatic device includes a mounting seat, at least one group of first vertical cylinders is fixedly mounted on the upper end surface of the mounting seat, two groups of second connecting ports are opened at the lower end of the first vertical cylinders, both groups of the second connecting ports are connected with one-way valve devices, one group of the one-way valve devices is connected with a temporary storage device, the output end of the temporary storage device is connected with a group of the first connecting ports of the ejection assembly through an air guide pipe, a second vertical cylinder is arranged above and opposite to the first vertical cylinder, a first push rod is slidably inserted between the first vertical cylinder and the second vertical cylinder, and a first connecting rod and a second connecting rod are welded to the upper end of the second vertical cylinder.

[0011] Preferably, the inner diameter of the first vertical tube is larger than the outer diameter of the second vertical tube, the second vertical tube can enter the interior of the first vertical tube, the second connecting rod is an "L"-shaped structure, and the length of the middle part of the second connecting rod is larger than the height of the first vertical tube.

[0012] Preferably, a second elastic member is elastically connected between the first push rod and the inner end surface of the second vertical cylinder, a limiting rod is integrally formed at one end of the first push rod located inside the second vertical cylinder, a limiting protrusion is integrally formed at the opening of the second vertical cylinder, and a limiting ring is integrally formed on the inner end surface of the first vertical cylinder located above the second connecting port.

[0013] Preferably, the temporary storage device includes a third cavity, one end of the third cavity is communicated with a group of the one-way valve devices, a fourth cavity is integrally formed on the outer end surface of the third cavity, a third connecting port for communicating with the ejection assembly through an air guide tube is opened on one side of the fourth cavity, a second push rod extending upward is movably inserted into the interior of the fourth cavity, one end of the second push rod located inside the fourth cavity is fixedly sleeved with a butt joint for sealing, a limiting block is integrally formed on the lower end of the second push rod located on the side outside the fourth cavity, one end of the first connecting rod is slidably sleeved on the periphery of the second push rod, and a third elastic member is elastically abutted between the limiting block and the first connecting rod.

[0014] Preferably, an elastic diaphragm is adhered to the inner wall of one side of the third cavity to improve the gas buffering effect, and the elastic diaphragm is an elastic rubber structure.

[0015] Preferably, the abutment joint is a rubber structure, the upper end of the abutment joint is an annular structure, the lower end of the abutment joint is a trapezoidal structure, the annular structure abuts against the inner wall of the fourth cavity, and the trapezoidal structure abuts against the opening between the third cavity and the fourth cavity.

[0016] Preferably, the first vertical cylinder, the second vertical cylinder and the first push rod are all provided with multiple groups, and a group of the one-way valve devices for gas discharge on the first vertical cylinder is fixedly installed with a blowing port having a diversion effect.

[0017] The punching device for small hardware parts proposed by the present invention has the following beneficial effects:

[0018] Through the ejection assembly provided, the slow-release device in the ejection assembly cooperates with the ejector rod, so that the ejector rod can be slowly ejected under the push of the first elastic member, and then through the one-way valve device provided, the ejector rod can move downward quickly, and the gas inside the mounting tube can be quickly released through the one-way valve device, thereby realizing the functions of rapid contraction and slow ejection, and the main body structure at the upper end of the ejection assembly is more compact, which can form a higher fit with the mold seat, reducing the impact on the stamping effect;

[0019] Through the cooperation between the ejector assembly and the pneumatic device, the displacement of the ejector rod in the ejector assembly is coordinated with the stroke of the punch head. In this structure, the ejector rod is naturally retracted inside the mounting tube, which is convenient for placing the hardware to be processed in the mold seat. The ejector rod will only perform a slow ejection action after the punch head completes a punching and resets, thereby improving the punching quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the main body installation state;

[0021] Figure 2 It is a side cross-sectional structural schematic diagram of the main body in the installed state;

[0022] Figure 3 It is a schematic diagram of the main structure of the ejector assembly;

[0023] Figure 4 It is a schematic diagram of the side cross-sectional structure of the main body of the ejection component;

[0024] Figure 5 It is a schematic diagram of the main structure of the ejection assembly and the pneumatic device combination;

[0025] Figure 6 It is a schematic diagram of the main structure of the pneumatic device;

[0026] Figure 7 It is a schematic diagram of the main cross-sectional structure of the pneumatic device;

[0027] Figure 8 It is a schematic diagram of the main cross-sectional structure of the temporary storage device.

[0028] In the figure:

[0029] 1. Device body; 101. Die base; 102. Punching head;

[0030] 2. Mounting tube; 201. Separation ring; 202. First connection port; 203. Ejector rod; 204. First elastic member; 205. Fastening plate; 3. First cavity; 301. Separation plate; 302. Separation pad; 4. Second cavity; 401. Air release hole;

[0031] 5. Mounting seat; 6. First vertical cylinder; 601. Limiting ring; 602. Second connecting port; 7. First push rod; 701. Sliding block; 702. Limiting rod; 8. Second vertical cylinder; 801. Second elastic member; 802. First connecting rod; 803. Second connecting rod;

[0032] 9. The third cavity; 901. The fourth cavity; 9011. The third connection port; 902. The second push rod; 9021. The limit block; 9022. The abutment head; 903. The third elastic member; 904. The elastic diaphragm; 10. The air blowing port. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Reference Figure 1-4 , here is an example of the implementation method of the subject:

[0035] A punching device for small hardware parts, comprising an ejection assembly for ejecting hardware parts in a mold seat 101, the ejection assembly comprising a mounting tube 2 with through holes extending upward and downward therethrough, a separation ring 201 integrally formed on the inner wall of the mounting tube 2 to divide the interior of the mounting tube 2 into two groups of upper and lower chambers, a push rod 203 extending to the outside is slidably mounted inside one of the chambers, a first elastic member 204 is elastically connected between the push rod 203 and the separation ring 201, at least two groups of first connection ports 202 for expansion are opened on the periphery of the other group of chambers, one group of the first connection ports 202 is connected to a one-way valve device, and the other group of the first connection ports 202 is connected to a slow-release device or a pneumatic device;

[0036] Based on the above content, refer to Figure 1 , 2 The punching device body 1 and the die base 101 should be provided with a through hole for installing the ejector assembly, and a threaded groove can be provided inside the through hole for threaded installation of the ejector assembly. Since only one end of the ejector assembly with the ejector rod 203 needs to be installed in the device body 1 and the die base 101, the inner diameter of the through hole is small to reduce the impact on the die base 101, thereby reducing the impact of the mechanism on the stamping quality; when the connection device of the first connection port 202 is a one-way valve device and a slow-release device, its installation method refers to Figure 2 The left part, its structure refers to Figure 3 , 4 In this state, the first elastic member 204 is a spring structure, so that the push rod 203 extends outward in the natural state. When the stamping operation is performed, the push rod 203 retracts into the mounting tube 2 under the pressure, and the excess air inside it is discharged through the one-way valve device. When the stamping is completed, the push rod 203 extends outward under the action of the first elastic member 204. At this time, the one-way valve device is closed. The air pressure in the mounting tube 2 decreases during the extension of the first elastic member 204. At this time, only air is input through the slow-release device, which has the effect of slowing down the extension of the push rod 203, thereby preventing the push rod 203 from quickly bouncing up and ejecting the hardware. When the connecting device of the first connecting port 202 is a one-way valve device and a pneumatic device, the pneumatic device is linked with the punching head 102 of the punching device body 1. When the punching head 102 completes a stamping and resets, the pneumatic device will drive the push rod 203 to extend to realize the ejection of the hardware. The specific structure of the pneumatic device will be described below.

[0037] Furthermore, a fastening plate 205 for twisting is integrally formed on the periphery of the mounting tube 2 to facilitate the installation of the mounting tube 2 and the device body 1;

[0038] Furthermore, the outer sleeve at the lower end of the top rod 203 is provided with an O-shaped sealing ring that slides against the inside of the mounting tube 2 to perform a sealing function;

[0039] Furthermore, a threaded groove is formed on the periphery of the first connection port 202 for connecting a one-way valve device, a slow-release device or a pneumatic device.

[0040] Reference Figure 2 , 3 , here is an example of an implementation of a one-way valve device:

[0041] The one-way valve device comprises a first cavity 3 with left and right openings, a partition plate 301 is integrally formed inside the first cavity 3, a plurality of through holes are formed inside the partition plate 301, a partition pad 302 is movably inserted in the middle of the partition plate 301, and the transverse section of the partition pad 302 is a "D"-shaped structure;

[0042] Based on the above content, the partition plate 301 divides the interior of the first cavity 3 into two groups of chambers, and the two groups of chambers are connected through multiple groups of through holes opened on the partition plate 301. The partition pad 302 is a soft structure, one side of which is a plate-like structure that can cover the multiple groups of through holes on the partition plate 301. Figure 4 When the airflow flows from the left side to the right side, the airflow pushes the separation pad 302 to move to the right and enables the multiple groups of through holes on the separation plate 301 to conduct the airflow. When the airflow flows from the right side to the left side, the airflow pushes the separation pad 302 to move to the left and enables the multiple groups of through holes on the separation plate 301 to be blocked and closed by the separation pad 302, so as to realize the function of a one-way passage.

[0043] Furthermore, the middle portion of the separation pad 302 is movably inserted into a set of through holes located in the middle portion, so that the separation pad 302 can be easily replaced;

[0044] Furthermore, threaded grooves for installation are provided at the openings on the left and right sides of the first cavity 3 to communicate with a group of first connecting ports 202 .

[0045] Reference Figure 2 , 3 , here is an example of an implementation method of a sustained-release device:

[0046] The slow-release device comprises a second cavity 4 with an opening at the upper end, and a thin and long air release hole 401 is formed through the lower end of the second cavity 4 for gas circulation;

[0047] Based on the above content, the elongated air release hole 401 is used to reduce the air flow rate per unit time to achieve a slow ventilation effect, thereby realizing the slow-out function of the ejector rod 203;

[0048] Furthermore, a threaded groove for installation is provided at the upper opening of the second cavity 4 , which is used to communicate with a set of first connection ports 202 .

[0049] Reference Figure 5-8 , here is an example of how the pneumatic device can be implemented:

[0050] The pneumatic device includes a mounting seat 5, at least one set of first vertical cylinders 6 is fixedly mounted on the upper end surface of the mounting seat 5, two sets of second connection ports 602 are opened at the lower end of the first vertical cylinder 6, and the two sets of second connection ports 602 are both connected with one-way valve devices, one set of one-way valve devices is connected with a temporary storage device, and the output end of the temporary storage device is connected with a set of first connection ports 202 of the ejection assembly through an air guide pipe, and a second vertical cylinder 8 is arranged above the first vertical cylinder 6, and a first push rod 7 is slidably inserted between the first vertical cylinder 6 and the second vertical cylinder 8, and a first connecting rod 802 and a second connecting rod 803 are welded to the upper end of the second vertical cylinder 8;

[0051] Based on the above content, refer to Figure 5The first connecting rod 802 is used to cooperate with the temporary storage device to control the output timing of the temporary storage device, and the second connecting rod 803 is used to connect with the punch head 102 so that the punch head 102 can drive the second vertical cylinder 8 to move up and down; when the second connecting rod 803 pulls the second vertical cylinder 8 to move downward, it can drive the first push rod 7 to penetrate into the first vertical cylinder 6, and the air inside the first vertical cylinder 6 is compressed and enters the interior of the temporary storage device through a set of one-way valve devices. The output end of the temporary storage device is controlled by the first connecting rod 802, and it will be opened when the punch head 102 is reset. At this time, the ejector rod 203 in the ejection assembly extends to eject the hardware in the mold base 101; the two sets of one-way valve devices are designed in reverse, which are used for deflation when the second vertical cylinder 8 moves downward and suction when the second vertical cylinder 8 moves upward. The temporary storage device should be connected to a set of one-way valve devices for deflation;

[0052] For further reference, Figure 6 The inner diameter of the first vertical cylinder 6 should be greater than the outer diameter of the second vertical cylinder 8, so that the second vertical cylinder 8 can enter the interior of the first vertical cylinder 6, the second connecting rod 803 is an "L"-shaped structure, and the length of the middle part of the second connecting rod 803 is greater than the height of the first vertical cylinder 6, so that the maximum stroke between the first vertical cylinder 6 and the second vertical cylinder 8 is greater than the stroke length of the punch head 102;

[0053] Furthermore, a sliding block 701 is integrally formed at one end of the first push rod 7 located inside the first vertical tube 6, and a sealing ring is sleeved on the outer periphery of the sliding block 701 to slide against the inner wall of the first vertical tube 6 to achieve a sliding sealing effect;

[0054] Furthermore, a second elastic member 801 is elastically connected between the first push rod 7 and the inner end surface of the second vertical tube 8. A limiting rod 702 is integrally formed at one end of the first push rod 7 located inside the second vertical tube 8, which is used to control the minimum contraction limit of the first push rod 7 in the second vertical tube 8 to prevent the second elastic member 801 from being squeezed and damaged. The second elastic member 801 is a spring structure. The setting of the second elastic member 801 provides an elastic reserved space, which can better stabilize the air pressure and avoid excessive pressure compared with the integrated rigid structure.

[0055] Furthermore, a limiting protrusion is integrally formed at the opening of the second vertical cylinder 8 to prevent the first push rod 7 from escaping from the second vertical cylinder 8 , and a limiting ring 601 is integrally formed on the inner end surface of the first vertical cylinder 6 above the second connecting port 602 .

[0056] Reference Figure 7 , 8 , here is an example of an implementation of the temporary storage device:

[0057] The temporary storage device includes a third cavity 9, one end of which is connected to a group of one-way valve devices, a fourth cavity 901 is integrally formed on the outer end surface of the third cavity 9, a third connection port 9011 for communicating with the ejection assembly through an air guide tube is provided on one side of the fourth cavity 901, a second push rod 902 extending upward is movably inserted inside the fourth cavity 901, one end of the second push rod 902 located inside the fourth cavity 901 is fixedly sleeved with a butt joint 9022 for sealing, a limiting block 9021 is integrally formed on the lower end of the second push rod 902 located outside the fourth cavity 901, one end of the first connecting rod 802 is slidably sleeved on the periphery of the second push rod 902, and a third elastic member 903 is elastically abutted between the limiting block 9021 and the first connecting rod 802;

[0058] Based on the above content, the abutment joint 9022 is used to control the connection state between the third cavity 9 and the fourth cavity 901. When the punch head 102 moves downward for punching, the first connecting rod 802 moves downward to squeeze the third elastic member 903 to contract, and the third elastic member 903 elastically pushes the second push rod 902 downward so that the abutment joint 9022 achieves a sealing effect. When the punch head 102 moves upward to reset, the third elastic member 903 is unfolded, and the elastic abutment force on the second push rod 902 decreases, and the abutment joint 9022 cancels the closure to achieve ventilation; and because the third elastic member 903 is used as a pushing structure, the deflation process of the third cavity 9 is relatively linear, which prevents the ejector rod 203 from suddenly extending.

[0059] Furthermore, an elastic membrane 904 is adhered to the inner wall of one side of the third cavity 9 to improve the gas buffering effect. The elastic membrane 904 is an elastic rubber structure and can be elastically expanded.

[0060] Furthermore, the abutment joint 9022 is a rubber structure, the upper end of the abutment joint 9022 is an annular structure, and the lower end of the abutment joint 9022 is a trapezoidal structure to improve the closed abutment effect. The annular structure at its upper end abuts against the inner wall of the fourth cavity 901 to seal and improve stability, and the trapezoidal structure at its upper end abuts against the opening between the third cavity 9 and the fourth cavity 901 to form a first sealing structure.

[0061] Last addition:

[0062] refer to Figure 1 , 2 , the device body 1 and the mold base 101 should reserve mounting holes for installing the ejection assembly;

[0063] refer to Figure 6When there are multiple sets of first vertical cylinder 6, second vertical cylinder 8 and first push rod 7 in the pneumatic device, a set of one-way valve devices for gas discharge on the first vertical cylinder can be equipped with a blowing port 10 with a diversion effect, so that the punch head 102 can blow the mold base 101 every time it performs a working stroke to avoid dust accumulation;

[0064] When the ejection assembly is used in conjunction with the pneumatic device, the slow-release device can be installed at the output end of the one-way valve device, so that the one-way valve device can slowly release the air inside the mounting tube 2. In the current matching state, the first elastic member 204 is a tension spring structure, and the ejector rod 203 is naturally contracted inside the mounting tube 2. Compared with using the ejection assembly alone, the hardware can be better placed.

[0065] Based on the above-mentioned embodiments, when assembling:

[0066] The device body 1 and its mold base 101 are pre-opened with through holes and threaded grooves; then the mounting tube 2 is rotated by the fastening plate 205 and its upper end is installed in the pre-opened through hole, and the ejection assembly and the slow-release device or the pneumatic device are respectively connected to the two sets of first connection ports 202;

[0067] The mounting base 5 is fixed to the table of the device body 1 by means of bolts, etc., the first connecting rod 802 and the second connecting rod 803 are connected to the punch head 102, and the ejection assembly is connected to the pneumatic device through the air guide pipe to complete the installation of the main body.

[0068] Based on the above implementation examples, when used:

[0069] When a single ejection assembly is used, a one-way valve device and a slow-release device are respectively installed at the two groups of first connection ports 202, wherein the installation method of the one-way valve device is an outward exhaust structure. In a natural state, the ejector rod 203 extends outward under the action of the first elastic member 204. When the punching operation is performed, the ejector rod 203 retracts under the action of the punch head 102, and the excess gas in the installation tube 2 is discharged outward through the one-way valve device. When the punching is completed, the ejector rod 203 extends outward under the action of the first elastic member 204, but due to the slow-release device, the reset speed of the ejector rod 203 is slow, so as to prevent the ejector rod 203 from knocking off the hardware.

[0070] When the solution of cooperating the ejection assembly with the pneumatic device is adopted, the one-way valve device and the air guide tube are respectively installed at the two groups of first connecting ports 202, wherein the air guide tube is connected with the pneumatic device. In the natural state of this solution, the ejector rod 203 is contracted inside the mounting tube 2. When the punch head 102 moves downward for punching, the punch head 102 drives the first connecting rod 802 and the second connecting rod 803 to move downward. The first connecting rod 802 causes the third elastic member 903 to contract. At this time, the abutment joint 9022 forms an abutment seal. The second connecting rod 803 drives the second vertical cylinder 8 to move downward, so that the air in the first vertical cylinder 6 is compressed and passes through a group of one-way valve devices into the interior of the temporary storage device. When the punch head 102 When the stamping is completed and moves upward, the punching head 102 drives the first connecting rod 802 and the second connecting rod 803 to move upward, and the first connecting rod 802 causes the third elastic member 903 to expand. At this time, the abutment joint 9022 gradually opens to release air, and the airflow enters the ejection assembly through the air guide tube and pushes the ejector rod 203 to move and eject the hardware. The second connecting rod 803 drives the second vertical tube 8 to move upward. At this time, a set of one-way valve devices connected to the temporary storage device is closed, and another set of one-way valve devices is opened to balance the air pressure inside the first vertical tube 6 with the outside world. When the ejection of the ejector rod 203 is completed and the gas in the temporary storage device is released, the ejector rod 203 is reset under the action of the elastic member, and the next round of stamping operation can be carried out.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A punching device for small hardware, including an ejector assembly, characterized in that: The ejection assembly comprises a mounting tube (2) with through holes extending therethrough from top to bottom, the inner wall of the mounting tube (2) being integrally formed with a separation ring (201) so as to divide the interior of the mounting tube (2) into two groups of upper and lower chambers, a push rod (203) extending to the outside being slidably mounted inside one of the chambers, a first elastic member (204) being elastically connected between the push rod (203) and the separation ring (201), and at least two groups of first connection ports (202) for expansion are provided on the periphery of the other group of chambers, one group of the first connection ports (202) being connected to a one-way valve device, and the other group of the first connection ports (202) being connected to a slow-release device or a pneumatic device; The slow-release device comprises a second cavity (4) with an opening at the upper end, and a thin and long air release hole (401) is provided through the lower end of the second cavity (4) for gas circulation; The pneumatic device comprises a mounting seat (5), at least one group of first vertical cylinders (6) is fixedly mounted on the upper end surface of the mounting seat (5), two groups of second connecting ports (602) are provided at the lower end of the first vertical cylinder (6), both groups of the second connecting ports (602) are connected with a one-way valve device, one group of the one-way valve devices is connected with a temporary storage device, the output end of the temporary storage device is connected with a group of the first connecting ports (202) of the ejection assembly through an air guide pipe, a second vertical cylinder (8) is arranged opposite to the upper side of the first vertical cylinder (6), a first push rod (7) is slidably inserted between the first vertical cylinder (6) and the second vertical cylinder (8), and a first connecting rod (802) and a second connecting rod (803) are welded to the upper end of the second vertical cylinder (8); The temporary storage device comprises a third cavity (9), one end of the third cavity (9) is communicated with a group of one-way valve devices, a fourth cavity (901) is integrally formed on the outer end surface of the third cavity (9), a third connecting port (9011) for communicating with the ejection assembly through an air guide tube is provided on one side of the fourth cavity (901), a second push rod (902) extending upward is movably inserted inside the fourth cavity (901), one end of the second push rod (902) located inside the fourth cavity (901) is fixedly sleeved with a butt joint (9022) for sealing, a limiting block (9021) is integrally formed on the lower end of the second push rod (902) located outside the fourth cavity (901), one end of the first connecting rod (802) is slidably sleeved on the periphery of the second push rod (902), and a third elastic member (903) is elastically butted between the limiting block (9021) and the first connecting rod (802).

2. A punching device for small hardware according to claim 1, characterized in that: The one-way valve device comprises a first cavity (3) with left and right openings, a partition plate (301) is integrally formed inside the first cavity (3), a plurality of through holes are provided inside the partition plate (301), a partition pad (302) is movably inserted in the middle of the partition plate (301), and the transverse section of the partition pad (302) is a "T"-shaped structure.

3. A punching device for small hardware according to claim 1, characterized in that: The inner diameter of the first vertical cylinder (6) is greater than the outer diameter of the second vertical cylinder (8), and the second vertical cylinder (8) can enter the interior of the first vertical cylinder (6). The second connecting rod (803) is an "L"-shaped structure, and the length of the middle part of the second connecting rod (803) is greater than the height of the first vertical cylinder (6).

4. A punching device for small hardware according to claim 1, characterized in that: A second elastic member (801) is elastically connected between the first push rod (7) and the inner end surface of the second vertical cylinder (8); a limiting rod (702) is integrally formed at one end of the first push rod (7) located inside the second vertical cylinder (8); a limiting protrusion is integrally formed at the opening of the second vertical cylinder (8); and a limiting ring (601) is integrally formed at the inner end surface of the first vertical cylinder (6) located above the second connecting port (602).

5. The punching device for small hardware according to claim 1, characterized in that: An elastic diaphragm (904) is adhered to the inner wall of one side of the third cavity (9) to improve the gas buffering effect, and the elastic diaphragm (904) is an elastic rubber structure.

6. A punching device for small hardware according to claim 1, characterized in that: The abutment joint (9022) is a rubber structure, the upper end of the abutment joint (9022) is an annular structure, and the lower end of the abutment joint (9022) is a trapezoidal structure, the annular structure abuts against the inner wall of the fourth cavity (901), and the trapezoidal structure abuts against the opening between the third cavity (9) and the fourth cavity (901).

7. A punching device for small hardware according to claim 1, characterized in that: The first vertical cylinder (6), the second vertical cylinder (8) and the first push rod (7) are all provided with multiple groups, and a group of one-way valve devices for gas discharge on the first vertical cylinder (6) is fixedly installed with a blowing port (10) having a diversion effect.

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