Punching device

Abstract

The utility model discloses a punching device. The punching device comprises a male die, a power assembly and a discharging plate, wherein the power assembly is used for driving the male die to move so as to punch a product to be machined, and the discharging plate is installed above the product to be machined. The discharging plate is provided with a guide hole extending in the moving direction of the male die, and the male die extends into the guide hole and can move in the guide hole. The size of the guide hole is matched with the size of the part, used for being matched with the guide hole, of the male die, so that the male die is guided by the guide hole when moving and blanking the product to be machined. The punching device is used for simplifying the structure of the punching device and improving the punching precision.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a punching device. Background Technology

[0002] Stamping is a process that applies force to a portion of a sheet metal to bend or deform it, or to separate parts of the material. A common stamping method is hole punching, which uses a punch to strike the sheet metal, causing the portion of the sheet metal in contact with the punch to separate from the sheet metal, thus creating a hole in the sheet metal with the same dimensions as the punch. Current punching processes generally involve mounting suitable dies on a stamping press. The dies consist of an upper die and a lower die, which are respectively mounted on the stamping press. The stamping press drives the upper and lower dies to close, thus stamping the sheet metal.

[0003] The upper die includes a base, back plate, punch, punch fixing plate, stripper plate, and guide sleeve, while the lower die includes a base, back plate, die, die fixing plate, and guide pillars. Different products have different processing requirements, necessitating the design and fabrication of different dies for each product. Some existing products do not require batch stamping; stamping creates holes for inspection, but fabricating complete sets of dies for these products would be complex and costly. Therefore, a simple punching device is urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a punching device that simplifies the structure of the punching device and improves the accuracy of punching.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A punching device includes a punch, a power assembly for driving the punch to move in order to punch a product to be processed, and a stripper plate mounted above the product to be processed; the stripper plate is provided with a guide hole extending along the moving direction of the punch, the punch extending into the guide hole and being movable within the guide hole; the size of the guide hole is adapted to the size of the part of the punch used to mate with the guide hole, so that the punch is guided by the guide hole when moving and punching the product to be processed.

[0007] Preferably, the device further includes a die, which has a cavity that mates with the punch, the cavity being directly opposite the guide hole and the axis of the cavity coinciding with the axis of the guide hole.

[0008] Preferably, the assembly further includes a mounting plate for mounting the die, the unloading plate including a fixing part and a guide part, the fixing part being fixedly mounted on the mounting plate, the guide part having the guide hole and being located above the die; the guide part being spaced apart from the mounting plate and the die to form an installation space for placing the product to be processed.

[0009] Preferably, the thickness of the fixing part is greater than the thickness of the guide part, and the end of the fixing part adjacent to the die and the end of the guide part adjacent to the die form a stepped structure, and the guide part is supported by the fixing part to be suspended relative to the die.

[0010] Preferably, the mounting plate is provided with a mounting cavity for accommodating the die, and an adjusting block is provided in the mounting cavity to abut against the die. The mounting position of the die in the mounting cavity can be changed by adjusting the size of the adjusting block.

[0011] Preferably, in the initial state, the punch extends into the guide hole, and the punching end of the punch for punching the product to be processed is located inside the guide hole.

[0012] Preferably, the punch is connected to a sleeve, the sleeve is fitted onto the punch, and a buffer space is formed inside the sleeve. The sleeve is connected to the power assembly, and the power transmitted by the power assembly is transmitted to the punch through the sleeve.

[0013] During punching, the punch passes through the buffer space to abut against the sleeve and then receives power transmitted by the power assembly.

[0014] Preferably, the punch includes a head and a rod; the sleeve is provided with a stepped hole that mates with the punch, the stepped hole including a first part for receiving the head and a second part for mates with the rod; the extension length of the first part is greater than the height of the head, so that a buffer space is formed in the first part on the side of the head away from the product to be processed.

[0015] Preferably, the first portion extends in a direction away from the product to be processed to penetrate the sleeve, and a sealing member is provided at the end of the first portion. The sealing member is used to seal the first portion and to abut against the punch to transmit power to the punch.

[0016] The sealing component is detachably connected to the sleeve.

[0017] Preferably, the power assembly includes an operating handle and a transmission unit. The operating handle receives the force applied by the operator, and the transmission unit is used to transmit the force received by the operating handle to the punch to punch the product to be processed.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0019] By providing guide holes on the stripper plate that mate with the punch, the punch is guided by the stripper plate, eliminating the need for complex guiding structures such as guide sleeves and guide pillars in the punching device. This simplifies the structure of the punching device and reduces its manufacturing cost. Furthermore, the stripper plate directly guides the punch, ensuring high movement accuracy and thus improving the punch's precision when punching the product. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of the punching device according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the sleeve structure according to an embodiment of the present utility model;

[0022] Figure 3 This is a partial structural schematic diagram of the punching device according to an embodiment of the present utility model.

[0023] In the diagram: 1. Punch; 11. Head; 12. Rod; 13. Sleeve; 131. Buffer space; 132. Stepped hole; 1321. First part; 1322. Second part; 133. Sealing part; 14. Punching end; 2. Die; 21. Hole; 22. Mounting plate; 221. Mounting cavity; 222. Adjusting block; 23. Drop hole; 3. Unloading plate; 31. Guide hole; 32. Fixing part; 33. Guide part; 4. Mounting space; 5. Back plate; 6. Base. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0025] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0026] like Figures 1 to 3As shown, this utility model provides a punching device for punching a product to be processed to form the required holes in the product. The punching device includes a punch 1 and a die 2 that cooperate with each other, a power assembly (not shown) for driving the punch 1 and the die 2 to close, and a stripper plate 3 for unloading the material. It may also include a mounting plate 22, a back plate 5, and a base 6.

[0027] Reference Figure 1 The punch 1 receives externally transmitted power to punch the product to be processed. For example, the punch 1 receives power applied to the power assembly by an operator to punch the product to be processed. The punch 1 includes a head 11 and a rod 12. The diameter of the rod 12 is smaller than the diameter of the head 11, and the rod 12 is used to contact the product to be processed to punch a hole in the product. One end of the rod 12 adjacent to the die 2 serves as a punching end 14, and the punching end 14 of the rod 12 has the same diameter as the hole to be processed in the product.

[0028] Reference Figure 1 and Figure 2 The die 2 has a cavity 21 that mates with the punch 1. The cavity 21 is positioned opposite the punch 1. After punching the product to be processed, the punching end 14 of the punch 1 moves into the cavity 21 of the die 2. The diameter of the cavity 21 is the same as or slightly larger than the diameter of the punching end 14. A blanking hole 23 is connected below the cavity 21. The diameter of the blanking hole 23 is larger than the diameter of the cavity 21. One end of the blanking hole 23 communicates with the cavity 21, and the other end of the blanking hole 23 extends to the through punching device. The blanking hole 23 can be partially located in the die 2, that is, the cavity 21 is located in the upper part of the die 2, and the blanking hole 23 is located in the lower part of the die 2; the remaining part of the blanking hole 23 can be located on the back plate 5 and the base 6. The diameters of the blanking holes 23 located in the corresponding parts of the die 2, the back plate 5, and the base 6 can be the same or different.

[0029] During punching, punch 1 applies an impact force towards the product to punch it. Punch 1 and the scrap punched from the product move into the die cavity 21. Then punch 1 moves upward to reset, and the scrap punched from the product falls into the blanking hole 23 connected to the die cavity 21 to complete the blanking, thereby completing one punching operation.

[0030] In some specific embodiments, the die 2 is mounted within the mounting plate 22. Specifically, the mounting plate 22 has a mounting cavity 221 for accommodating the die 2. To facilitate adjustment of the die 2's position, the wall forming the mounting cavity 221 can be spaced apart from the die 2, allowing the die 2 to move within the mounting cavity 221. Furthermore, to ensure the die 2's position is fixed during use, an adjusting block 222 can be provided within the mounting cavity 221. The adjusting block 222 fills the gap between the die 2 and the mounting cavity 221, ensuring that the die 2 has no room to move within the mounting cavity 221, thereby fixing the die 2's position.

[0031] The position of the die 2 can be adjusted so that the die hole 21 of the die 2 is aligned with the punch 1. Then, an adjusting block 222 of appropriate size is used to fill the gap between the die 2 and the mounting cavity 221. When the mounting position of the die 2 is offset, the corresponding adjusting block 222 can be removed, and then the adjusting block 222 can be thickened or thinned. The adjusted adjusting block 222 is then installed in the mounting cavity 221 to adjust the position of the die 2. For example, when the mounting position of the die 2 is offset along the first direction, and the die 2 needs to move x millimeters along the positive direction of the first direction, the adjusting block 222 that abuts against the die 2 along the first direction can be removed. The adjusting block 222 located behind the die 2 along the first direction can be thickened by x millimeters, and the adjusting block 222 located in front of the die 2 along the first direction can be thinned by x millimeters. After the adjusting block 222 is reinstalled in the mounting cavity 221, the die 2 can be pressed by the adjusting block 222 and moved x millimeters along the first direction and kept in a fixed position. The thickening of the adjusting block 222 can be achieved by adding a shim to the original adjusting block 222 or by replacing the original adjusting block 222 with a thicker adjusting block 222; the thinning of the adjusting block 222 can be achieved by grinding the original adjusting block 222 to reduce its thickness or by replacing the original adjusting block 222 with a thinner adjusting block 222.

[0032] The stripper plate 3 is installed above and spaced apart from the die 2, forming an installation space 4 between the stripper plate 3 and the die 2 for mounting the product to be processed. When the punch 1 performs a stamping operation, the punch 1 passes through the stripper plate 3 to punch the product to be processed. After the punch 1 passes through the product to be processed, the product to be processed may be tightly fitted onto the punch 1. As the punch 1 returns to its original position, the product to be processed may move upward with the punch 1. As the product to be processed moves upward, it will abut against the stripper plate 3 to limit further movement, while the punch 1 continues to move upward to separate the punch 1 from the product to be processed, thereby completing the unloading.

[0033] The stripper plate 3 is provided with a guide hole 31, which penetrates the stripper plate 3 and is directly opposite the die hole 21, with the axis of the guide hole 31 coinciding with the die hole 21. The punch 1 can move upward or downward through the guide hole 31 of the stripper plate 3. The diameter of the guide hole 31 is adapted to the diameter of the punch 1; specifically, the diameter of the guide hole 31 is the same as or substantially the same as the diameter of the portion of the punch 1 used to penetrate the stripper plate 3. Therefore, when the punch 1 moves within the guide hole 31, the wall forming the guide hole 31 restricts the radial movement of the punch 1, allowing the punch 1 to move only vertically along the extension direction of the guide hole 31, thereby guiding the punch 1.

[0034] In existing punching devices, multiple guide sleeves and guide pillars are used to guide the movement of the punch 1. For example, guide sleeves and guide pillars are set at the four corners of the punching device to guide the movement of the punch 1. The structure is relatively complex. Furthermore, the guiding structure composed of guide sleeves and guide pillars indirectly guides the punch 1 by restricting the relative movement path of the guide sleeves and guide pillars. In this application, by providing a guide hole 31 adapted to the punch 1 on the stripper plate 3, the guide hole 31 can be used to guide the punch 1 without the need for multiple guide sleeves and guide pillars, effectively simplifying the structure of the punching device. Moreover, the guide hole 31 directly guides the punch 1, ensuring the movement accuracy of the punch 1 and thus improving the accuracy of punching the product to be processed.

[0035] In some specific embodiments, in the initial state, i.e., when punching is not performed, the punching end 14 of the punch 1 can extend into the guide hole 31 without protruding from it. When punching is required, the punching end 14 of the punch 1 moves within the guide hole 31 and then moves out of the guide hole 31 to contact the product to be processed and punch it. That is, in the initial state or during punching, the punch 1 is always located within the guide hole 31, so that the punch 1 is always constrained by the guide hole 31 in the radial direction, ensuring the positional accuracy of the punch 1, so that the punch 1 can be used for high-precision punching operations.

[0036] In some specific embodiments, the unloading plate 3 is fixedly mounted on the mounting plate 22. Specifically, the unloading plate 3 includes a fixing part 32 and a guide part 33 connected to each other. The fixing part 32 and the guide part 33 can be an integral connection structure. The fixing part 32 can be fixedly connected to the mounting plate 22, for example, the fixing part 32 is locked to the mounting plate 22 by screws, so that the unloading plate 3 is fixed to the mounting plate 22. The guide part 33 can be suspended relative to the mounting plate 22 and the die 2, and one end of the guide part 33 is connected to the fixing part 32 to be supported by the fixing part 32, thereby keeping the guide part 33 in a suspended state. The guide part 33 is provided with a guide hole 31 for guiding the punch 1, and the gap formed between the guide part 33, the mounting plate 22 and the punch 1 serves as a mounting space 4 for mounting the product to be processed.

[0037] The thickness of the fixing part 32 is greater than the thickness of the guide part 33. The end of the fixing part 32 away from the die 2 is flush with the end of the guide part 33 away from the die 2; for example, the upper end of the fixing part 32 is flush with the upper end of the guide part 33. The end of the fixing part 32 adjacent to the die 2 and the end of the guide part 33 adjacent to the die 2 form a stepped structure; for example, the lower end of the fixing part 32 and the lower end of the guide part 33 form a stepped structure. The end of the fixing part 32 adjacent to the die 2 is attached to the mounting plate 22, so that the thinner guide part 33 is suspended relative to the mounting plate 22.

[0038] In existing punching devices, the stripper plate 3 and the mounting plate 22 are separate structures, with the stripper plate 3 located in the upper die and the mounting plate 22 in the lower die. This configuration requires an upper die, which includes an upper die holder, an upper die pad, and other structures, making it complex and costly to manufacture. In this application, the stripper plate 3 is directly mounted on the mounting plate 22, and a portion of the punch 1 is located within the guide hole 31 of the stripper plate 3. Punching can be performed on the product by applying force to the punch 1. This application eliminates the need for a separate upper die, thus eliminating the need for an upper die holder, an upper die pad, and other structures, effectively simplifying the structure of the punching device and reducing its manufacturing cost.

[0039] Reference Figure 1 and Figure 2In some specific embodiments, the punch 1 is also connected to a sleeve 13, which is sleeved on the punch 1 and is used to connect to a power assembly to receive power transmitted by the power assembly. The sleeve 13 then transmits the power to the punch 1 so that the punch 1 punches the product to be processed. Specifically, the sleeve 13 may have holes adapted to fit the head 11 and the rod 12 of the punch 1. That is, the sleeve 13 has a stepped hole 132. The first part 1321 of the stepped hole 132 with a larger diameter is the same as or slightly larger than the outer diameter of the head 11 of the punch 1. The second part 1322 of the stepped hole 132 with a smaller diameter is the same as or slightly larger than the outer diameter of the rod 12 of the punch 1. Furthermore, the second part 1322 of the stepped hole 132 with a smaller diameter is smaller than the outer diameter of the head 11 of the punch 1. The second part 1322 of the stepped hole 132 passes through the end of the sleeve 13 facing the die 2, so that the rod part 12 of the punch 1 can extend out from the second part 1322 of the stepped hole 132; while the head 11 of the punch 1 cannot move to the second part 1322 with a smaller diameter in the stepped hole 132, thereby restricting the head 11 of the punch 1 to the sleeve 13.

[0040] In some specific embodiments, to provide a certain buffer during punching, a buffer space 131 can be formed inside the sleeve 13. The buffer space 131 is located on the side of the punch 1 facing away from the product to be processed. During punching, the punch 1 needs to move relative to the sleeve 13. After the punch 1 passes through the buffer space 131 and abuts against the sleeve 13, the sleeve 13 transmits the power of the power assembly to the punch 1 so that the punch 1 punches the product to be processed. The process of the punch 1 passing through the buffer space 131 can serve as a buffer during punching. Specifically, the first part 1321 of the stepped hole 132 in the sleeve 13 can extend away from the product to be processed, so that the head 11 of the punch 1 only occupies a portion of the first part 1321. The space above the punch 1 formed by the first part 1321 is the buffer space 131.

[0041] The first portion 1321 may extend into the through sleeve 13 or not. When the first portion 1321 extends into the through sleeve 13 in a direction away from the product to be processed, a sealing element 133 is provided at the end of the first portion 1321. The vertical gap between the sealing element 133 and the punch 1 forms a buffer space 131. During punching, the sleeve 12 moves the sealing element 133 toward the head 11 of the punch 1. When the punch 1 abuts against the sealing element 133, it receives the power transmitted by the power assembly. When the first portion 1321 does not extend into the through sleeve 13 in a direction away from the product to be processed, the vertical gap between the top wall of the sleeve 13 and the punch 1 forms a buffer space 131. During punching, the sleeve 13 moves toward the head 11 of the punch 1. When the punch 1 abuts against the top wall of the sleeve 13, it receives the power transmitted by the power assembly.

[0042] In a preferred embodiment, the first portion 1321 extends into the through sleeve 13 in a direction away from the product to be processed, and the sleeve 13 is provided with a removable sealing member 133 at the end of the first portion 1321. When it is necessary to disassemble the punch 1, the sealing member 133 is removed, and the punch 1 can be taken out from the top of the sleeve 13 or inserted from the top of the sleeve 13. The sealing member 133 can be a screw.

[0043] The power assembly includes an operating handle and a transmission unit. The operating handle can be manually driven. The operating handle is used by the operator to press and apply force to the power assembly. The operating handle transmits the force to the punch 1 via the transmission unit, which then powers the punch 1 for punching. The transmission unit that transmits the force from the operating handle to the punch 1 is widely used in the prior art and will not be described in detail here.

[0044] Reference Figure 1 In some specific embodiments, the punching device also includes a base 6 and a back plate 5. The base 6 can be placed on the ground or a table to support the punching device, and the back plate 5 is placed between the base 6 and the mounting plate 22.

[0045] During punching, with the operating handle not pressed, the punching end 14 of the punch 1 is located in the guide hole 31 of the stripper plate 3, and the head 11 of the punch 1 is located in the sleeve 13. A buffer space 131 is formed between the head 11 of the punch 1 and the sealing member 133 at the top of the sleeve 13. The product to be processed is placed in the installation gap formed between the stripper plate 3, the mounting plate 22, and the die 2. The operating handle is manually pressed, and the sleeve 13 moves under the drive of the power component. The sleeve 13 and the punch 1 move relative to each other. When the punch 1 penetrates the buffer gap of the sleeve 13 and abuts against the sealing member 133 at the top of the sleeve 13, the force generated by the operating handle acts on the punch 1, causing the punch 1 to punch the product to be processed. The waste material punched off the product is discharged from the discharge hole 23. The operating handle is reset and drives the sleeve 13 and the punch 1 to reset. The punch 1 moves down relative to the sleeve 13 by its own weight, so that a buffer space 131 is re-formed between the punch 1 and the sealing part 133 at the top of the sleeve 13.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A punching device, characterized in that The device includes a punch (1), a power assembly for driving the punch (1) to move to punch a product to be processed, and a stripper plate (3) mounted above the product to be processed. The stripper plate (3) is provided with a guide hole (31) extending along the moving direction of the punch (1). The punch (1) extends into the guide hole (31) and can move within the guide hole (31). The size of the guide hole (31) is adapted to the size of the part of the punch (1) that is used to mate with the guide hole (31) so that the punch (1) is guided by the guide hole (31) when it moves and punches the product to be processed.

2. The piercing apparatus of claim 1, wherein, It also includes a die (2), which is provided with a hole (21) that mates with the punch (1). The hole (21) is directly opposite the guide hole (31) and the axis of the hole (21) coincides with the axis of the guide hole (31).

3. The piercing apparatus of claim 2, wherein, It also includes a mounting plate (22) for mounting the die (2), the unloading plate (3) includes a fixing part (32) and a guide part (33), the fixing part (32) is fixedly mounted on the mounting plate (22), the guide part (33) has the guide hole (31) and the guide part (33) is located above the die (2); the guide part (33) is spaced apart from the mounting plate (22) and the die (2) to form an installation space (4) for placing the product to be processed.

4. The piercing apparatus of claim 3, wherein, The thickness of the fixing part (32) is greater than the thickness of the guide part (33). The end of the fixing part (32) adjacent to the die (2) and the end of the guide part (33) adjacent to the die (2) form a stepped structure. The guide part (33) is supported by the fixing part (32) to be suspended relative to the die (2).

5. The piercing apparatus of claim 3, wherein, The mounting plate (22) is provided with a mounting cavity (221) for accommodating the die (2). An adjusting block (222) is provided in the mounting cavity (221) to abut against the die (2). The mounting position of the die (2) in the mounting cavity (221) can be changed by adjusting the size of the adjusting block (222).

6. The punching apparatus according to claim 1, wherein In the initial state, the punch (1) extends into the guide hole (31), and the punch (1) for punching the blanking end (14) of the product to be processed is located in the guide hole (31).

7. The punching apparatus of claim 1 wherein, The punch (1) is connected to a sleeve (13), the sleeve (13) is fitted onto the punch (1), and a buffer space (131) is formed inside the sleeve (13). The sleeve (13) is connected to the power assembly, and the power transmitted by the power assembly is transmitted to the punch (1) through the sleeve (13). During punching, the punch (1) passes through the buffer space (131) to abut against the sleeve (13) and then receives the power transmitted by the power assembly.

8. The piercing apparatus of claim 7, wherein, The punch (1) includes a head (11) and a rod (12); the sleeve (13) is provided with a stepped hole (132) that mates with the punch (1), the stepped hole (132) includes a first part (1321) for receiving the head (11) and a second part (1322) for mates with the rod (12); the extension length of the first part (1321) is greater than the height of the head (11) so that a buffer space (131) is formed in the first part (1321) on the side of the head (11) away from the product to be processed.

9. The piercing apparatus of claim 8, wherein, The first part (1321) extends in a direction away from the product to be processed to penetrate the sleeve (13), and a sealing member (133) is provided at the end of the first part (1321). The sealing member (133) is used to seal the first part (1321) and to abut against the punch (1) to transmit power to the punch (1). The sealing component (133) is detachably connected to the sleeve (13).

10. The punching apparatus of claim 1, wherein The power assembly includes an operating handle and a transmission unit. The operating handle receives the force applied by the operator, and the transmission unit is used to transmit the force received by the operating handle to the punch (1) to punch the product to be processed.

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