Punching device for square blind hole of plastic shell

Abstract

The utility model belongs to the technical field of punching technologies, and particularly relates to a plastic shell square blind hole punching device which comprises a bottom plate, a first mounting plate is fixedly connected to the upper surface of the bottom plate, a fixing frame is fixedly connected to the upper surface of the bottom plate, a hydraulic rod is arranged in the fixing frame, and the output end of the hydraulic rod is fixedly connected with a second mounting plate. An upper cutter fixing plate is arranged at the bottom of the second mounting plate, a lower fixing plate is arranged at the top of the first mounting plate, clamping grooves are formed in the lower fixing plate and the upper cutter fixing plate, and rotating shafts are rotationally connected into the first mounting plate and the second mounting plate. According to the utility model, the rotating disc is twisted to pull the connecting plate to move, then the connecting rod is pulled to move, the sliding block slides towards the center, the spring is extruded to contract, then the clamping plate is placed in the clamping groove, finally the rotating disc is loosened to reset the spring, the clamping plate is clamped into the clamping groove, and the installation is completed, so that the installation difficulty is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of punching, in particular to a punching device for square blind holes of a plastic shell. Background Art

[0002] A plastic shell is an external protective shell made of plastic materials, used for encapsulating and protecting internal components or devices. Plastic shells are widely used in various fields such as electronic products, household appliances, instruments and meters, etc. It not only provides mechanical protection, but may also have decorative, isolation or heat dissipation functions. During the production and processing of plastic shells, punching work is often carried out. Square blind holes can help reduce the weight of the plastic shell. By punching holes in areas that do not affect the structural strength, the amount of material used can be reduced, thereby reducing the overall weight. For some electronic devices, square blind holes can be used to improve the heat dissipation performance. By punching holes, air circulation can be increased, helping heat to dissipate more effectively, thereby improving the heat dissipation efficiency of the device.

[0003] In traditional punching devices for square blind holes of plastic shells, bolt connection or welding technology is usually used to achieve the installation process of the mold. During operation, the plastic shell is placed on the top of the mold to ensure accurate alignment between the shell and the mold. Subsequently, by starting the punching equipment, the cutting tool will perform the stamping work. In this process, the cutting tool will penetrate the plastic shell to form the required square blind holes. However, the traditional mold installation method using bolts or welding does not consider the problem of troublesome installation. Therefore, a punching device for square blind holes of plastic shells is proposed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a punching device for square blind holes of a plastic shell, aiming to solve the technical problem of troublesome installation in the prior art.

[0005] To achieve the above purpose, the punching device for square blind holes of a plastic shell provided by the embodiment of the utility model includes a bottom plate. A first mounting plate is fixedly connected to the upper surface of the bottom plate. A fixing frame is fixedly connected to the upper surface of the bottom plate. A hydraulic rod is arranged inside the fixing frame. The output end of the hydraulic rod is fixedly connected to a second mounting plate. An upper tool fixing plate is arranged at the bottom of the second mounting plate. A lower fixing plate is arranged at the top of the first mounting plate. Slots are formed inside both the lower fixing plate and the upper tool fixing plate. A rotating shaft is rotatably connected inside both the first mounting plate and the second mounting plate. A central block is fixedly connected to the side wall of the rotating shaft. A sleeve is fixedly connected to the side wall of the central block. A sliding rod is slidably connected inside the sleeve. A spring is arranged inside the sleeve. One end of the spring is fixedly connected to the side wall of the central block, and the other end of the spring is fixedly connected to the side wall of the sliding rod. A sliding block is fixedly connected to the side wall of the sliding rod. A clamping plate is fixedly connected to the upper surface of the sliding block. A control component is arranged on the side wall of the rotating shaft;

[0006] Optionally, the control component includes a connecting rod, the side wall of the connecting rod is fixedly connected to the side wall of the slider, one end of the connecting rod is rotatably connected to a connecting plate, the side wall of the rotating shaft is rotatably connected to a synchronous plate, one side of the connecting plate is rotatably connected to the side wall of the synchronous plate, and a turntable is fixedly connected to the side wall of the rotating shaft;

[0007] Optionally, the upper central block is fixedly connected inside the second mounting plate, the upper slider, the clamping plate and the connecting rod are all slidably connected inside the second mounting plate, the lower central block is fixedly connected inside the first mounting plate, and the lower slider, the clamping plate and the connecting rod are all slidably connected inside the first mounting plate;

[0008] Optionally, the lower clamping plate is slidably connected to a card slot formed inside the upper knife fixing plate, and the lower clamping plate is slidably connected to a card slot formed inside the lower fixing plate;

[0009] Optionally, precision guide posts are arranged on the lower surface of the upper knife fixing plate, limit posts are arranged on the lower surface of the upper knife fixing plate, and the limit posts are arranged between the precision guide posts;

[0010] Optionally, a plurality of square cutting knives are arranged on the lower surface of the upper knife fixing plate, a pushing needle is arranged inside each square cutting knife, a plurality of suction cups are arranged on the lower surface of the upper knife fixing plate, and a plurality of linear bearings are arranged on the lower surface of the upper knife fixing plate;

[0011] Optionally, a product fixing fixture is arranged on the upper surface of the lower fixing plate, a lower cutting knife is arranged inside the product fixing fixture, and a stamping ball guide sleeve is arranged inside the lower fixing plate;

[0012] Optionally, the side wall of the limit post is slidably connected inside the lower fixing plate, and the precision guide post is slidably connected inside the stamping ball guide sleeve.

[0013] One or more of the above technical solutions in the square blind hole punching device for a plastic shell provided by the embodiment of the present invention have at least one of the following technical effects:

[0014] 1. In the present invention, by twisting the turntable to drive the rotation of the rotating shaft, driving the deflection of the synchronous plate, pulling the movement of the connecting plate, and further pulling the movement of the connecting rod, the slider slides towards the center, squeezing the spring to contract, and then placing the clamping plate into a card slot formed inside the lower fixing plate or the upper knife fixing plate, and finally releasing the turntable to make the spring reset, pushing the slider to move towards both sides, so that the clamping plate is stuck into the card slot, thereby completing the installation work. Through the above technical solution, the installation difficulty is reduced, and thus the installation efficiency is improved.

[0015] 2. In the present utility model, a plastic shell is sleeved on a product fixing jig. The hydraulic rod is started to drive the upper knife fixing plate to move downward, so that the precision guide post is inserted into the stamping ball guide sleeve. During the downward movement, the suction cup adsorbs and fixes the shell to avoid deviation. Punching is performed by a square cutter. After completion, the hydraulic rod drives the upper knife fixing plate to move upward, and the pushing needle pushes out the waste material to ensure cleanliness, avoid blockage, and ensure the tool life and cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a three-dimensional schematic diagram of a square blind hole punching device for a plastic shell proposed by the present utility model;

[0018] Figure 2 is a structural schematic diagram of mounting plate 1 of a square blind hole punching device for a plastic shell proposed by the present utility model;

[0019] Figure 3 is a structural schematic diagram of the rotating shaft of a square blind hole punching device for a plastic shell proposed by the present utility model;

[0020] Figure 4 is a planar structural schematic diagram of mounting plate 1 and mounting plate 2 of a square blind hole punching device for a plastic shell proposed by the present utility model;

[0021] Figure 5 is a structural schematic diagram of the upper knife fixing plate of a square blind hole punching device for a plastic shell proposed by the present utility model;

[0022] Figure 6 is a structural schematic diagram of the lower fixing plate of a square blind hole punching device for a plastic shell proposed by the present utility model.

[0023] Among them, the reference numerals in the drawings are as follows:

[0024] 1. Bottom plate; 2. Mounting plate 1; 3. Fixed frame; 4. Hydraulic rod; 5. Mounting plate 2; 6. Lower fixing plate; 7. Upper knife fixing plate; 8. Rotating shaft; 9. Central block; 10. Sleeve; 11. Slide bar; 12. Spring; 13. Slide block; 14. Clamping plate; 15. Connecting rod; 16. Synchronous plate; 17. Connecting plate; 18. Turntable; 19. Precision guide post; 20. Square cutter; 21. Limit post; 22. Linear bearing; 23. Suction cup; 24. Pushing needle; 25. Product fixing jig; 26. Lower cutter; 27. Stamping ball guide sleeve; 28. Card slot. Detailed implementation manners

[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the embodiments of the present utility model, and should not be construed as limiting the present utility model.

[0026] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0028] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] In one embodiment of the present utility model, with reference to Figures 1-4, An embodiment provided by the present utility model: a plastic shell square blind hole punching device, which includes a bottom plate 1. A first mounting plate 2 is fixedly connected to the upper surface of the bottom plate 1. A fixing frame 3 is fixedly connected to the upper surface of the bottom plate 1. A hydraulic rod 4 is arranged inside the fixing frame 3. The output end of the hydraulic rod 4 is fixedly connected to a second mounting plate 5. A upper knife fixing plate 7 is arranged at the bottom of the second mounting plate 5. A lower fixing plate 6 is arranged at the top of the first mounting plate 2. Slots 28 are opened inside both the lower fixing plate 6 and the upper knife fixing plate 7. A rotating shaft 8 is rotatably connected inside both the first mounting plate 2 and the second mounting plate 5. A central block 9 is fixedly connected to the side wall of the rotating shaft 8. A sleeve 10 is fixedly connected to the side wall of the central block 9. A sliding rod 11 is slidably connected inside the sleeve 10. A spring 12 is arranged inside the sleeve 10. One end of the spring 12 is fixedly connected to the side wall of the central block 9, and the other end of the spring 12 is fixedly connected to the side wall of the sliding rod 11. A slider 13 is fixedly connected to the side wall of the sliding rod 11. A clamping plate 14 is fixedly connected to the upper surface of the slider 13. A control component is arranged on the side wall of the rotating shaft 8. The control component includes a connecting rod 15. The side wall of the connecting rod 15 is fixedly connected to the side wall of the slider 13. One end of the connecting rod 15 is rotatably connected to a connecting plate 17. A synchronous plate 16 is rotatably connected to the side wall of the rotating shaft 8. One side of the connecting plate 17 is rotatably connected to the side wall of the synchronous plate 16. A turntable 18 is fixedly connected to the side wall of the rotating shaft 8. The top central block 9 is fixedly connected inside the second mounting plate 5. The top slider 13, clamping plate 14 and connecting rod 15 are all slidably connected inside the second mounting plate 5. The bottom central block 9 is fixedly connected inside the first mounting plate 2. The bottom slider 13, clamping plate 14 and connecting rod 15 are all slidably connected inside the first mounting plate 2. The bottom clamping plate 14 is slidably connected in the slot 28 opened inside the upper knife fixing plate 7, and the bottom clamping plate 14 is slidably connected in the slot 28 opened inside the lower fixing plate 6;

[0030] When installing the upper knife fixing plate 7 and the lower fixing plate 6, first, it is necessary to twist the turntable 18. In this way, the rotating shaft 8 is driven to rotate. When the rotating shaft 8 starts to rotate, it drives the synchronous plate 16 to deflect, thereby pulling the connecting plate 17 to move. One side of the connecting plate 17 rotates on the synchronous plate 16, while the other side rotates on the connecting rod 15 and simultaneously pulls the connecting rod 15 to move. This movement causes the slider 13 to slide towards the center, squeezing the spring 12 and making it contract. At this time, place the lower fixing plate 6 on the top of the mounting plate 1-2 and ensure that the clamping plate 14 is placed in the card slot 28 opened inside the lower fixing plate 6. After completing these steps, release the turntable 18. The spring 12 will reset due to the loss of pressure, pushing the slider 13 to move towards both sides, causing the clamping plate 14 to snap into the inside of the card slot 28, thus completing the installation of the lower fixing plate 6; when installing the upper knife fixing plate 7, by twisting the turntable 18 in the mounting plate 2-5, the spring 12 is contracted. Then, place the clamping plate 14 in the card slot 28 opened inside the upper knife fixing plate 7 and release the turntable 18, thereby completing the installation of the upper knife fixing plate 7. By the above method, the problem that the traditional mold fixing method is more troublesome to install and fix with bolts is solved.

[0031] Referring to Figures 5-6 , a precision guide post 19 is provided on the lower surface of the upper knife fixing plate 7, a limit post 21 is provided on the lower surface of the upper knife fixing plate 7, the limit post 21 is arranged between the precision guide posts 19, a plurality of square cutting knives 20 are provided on the lower surface of the upper knife fixing plate 7, a pushing needle 24 is arranged inside each square cutting knife 20, a plurality of suction cups 23 are provided on the lower surface of the upper knife fixing plate 7, a plurality of linear bearings 22 are provided on the lower surface of the upper knife fixing plate 7, a product fixing fixture 25 is provided on the upper surface of the lower fixing plate 6, a lower cutting knife 26 is arranged inside the product fixing fixture 25, a stamping ball bushing 27 is arranged inside the lower fixing plate 6, the side wall of the limit post 21 is slidably connected inside the lower fixing plate 6, and the precision guide post 19 is slidably connected inside the stamping ball bushing 27.

[0032] After completing the installation of the mold and before performing the punching operation, the plastic shell is sleeved on the product fixing fixture 25. Subsequently, the operator activates the hydraulic rod 4, and the activation of the hydraulic rod 4 will drive the upper knife fixing plate 7 to move downward. During this process, the precision guide pillar 19 will gradually insert into the inside of the stamping ball bushing 27 to ensure a tight fit between the two. As the upper knife fixing plate 7 gradually moves downward, the suction cup 23 will start to play its role. The suction cup 23 will adsorb on the plastic shell to fix it. This fixing method can effectively avoid the situation where the punching position deviates due to the offset of the shell during the punching operation. In this way, the accuracy and consistency of punching can be ensured, thereby improving the overall quality of the product. During the punching operation, the square cutting knife 20 will punch the plastic shell. After the punching operation is completed, the hydraulic rod 4 will be activated again to drive the upper knife fixing plate 7 to move upward. As the upper knife fixing plate 7 rises, the push pin 24 will push out the waste residue remaining in the punched hole inside the square cutting knife 20 to ensure the cleanliness inside the square cutting knife 20. This not only avoids the blockage situation inside the square cutting knife 20 during the next cutting, but also ensures the service life and cutting effect of the cutting tool.

[0033] Working principle: When installing the upper knife fixing plate 7 and the lower fixing plate 6, first twist the turntable 18 to drive the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, it will drive the synchronous plate 16 to deflect, thereby pulling the connecting plate 17 to move, causing one side of the connecting plate 17 to rotate on the synchronous plate 16, and at the same time, the other side rotates on the connecting rod 15 and pulls the connecting rod 15 to move, so that the slider 13 slides inward to squeeze the spring 12 to make it contract. At this time, place the lower fixing plate 6 on the top of the mounting plate 1-2, and place the clamping plate 14 in the card slot 28 opened inside the lower fixing plate 6. Then release the turntable 18, and the spring 12 will reset due to the loss of pressure, pushing the slider 13 to move to both sides, so that the clamping plate 14 is stuck into the inside of the card slot 28 to complete the installation of the lower fixing plate 6. When installing the upper knife fixing plate 7, twist the turntable 18 in the mounting plate 2-5 to make the spring 12 contract, then place the clamping plate 14 in the card slot 28 opened inside the upper knife fixing plate 7, and release the turntable 18 to complete the installation of the upper knife fixing plate 7;

[0034] After the mold is installed, the plastic shell can be sleeved on the product fixing fixture 25, and then the hydraulic rod 4 is started to drive the upper knife fixing plate 7 to move downward, so that the precision guide post 19 is inserted into the inside of the stamping ball bushing 27. As the upper knife fixing plate 7 gradually moves downward, the suction cup 23 will adsorb on the plastic shell to fix it, avoiding the situation that the punching position is offset due to the offset of the shell during the punching operation. The punching of the shell is carried out by the square cutter 20. After the work is completed, when the hydraulic rod 4 drives the upper knife fixing plate 7 to move upward, the push pin 24 will push out the waste residue remaining in the punching of the square cutter 20, avoiding the situation of blockage inside the square cutter 20 during the next cutting.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Plastic housing square blind hole punching device, including a bottom plate (1), characterized in that: On the upper surface of the bottom plate (1), a first mounting plate (2) is fixedly connected. On the upper surface of the bottom plate (1), a fixing frame (3) is fixedly connected. Inside the fixing frame (3), a hydraulic rod (4) is arranged. The output end of the hydraulic rod (4) is fixedly connected to a second mounting plate (5). At the bottom of the second mounting plate (5), an upper knife fixing plate (7) is arranged. At the top of the first mounting plate (2), a lower fixing plate (6) is arranged. Slots (28) are formed inside both the lower fixing plate (6) and the upper knife fixing plate (7). Inside both the first mounting plate (2) and the second mounting plate (5), a rotating shaft (8) is rotatably connected. On the side wall of the rotating shaft (8), a central block (9) is fixedly connected. On the side wall of the central block (9), a sleeve (10) is fixedly connected. Inside the sleeve (10), a sliding rod (11) is slidably connected. Inside the sleeve (10), a spring (12) is arranged. One end of the spring (12) is fixedly connected to the side wall of the central block (9), and the other end of the spring (12) is fixedly connected to the side wall of the sliding rod (11). On the side wall of the sliding rod (11), a slider (13) is fixedly connected. On the upper surface of the slider (13), a clamping plate (14) is fixedly connected. A control assembly is arranged on the side wall of the rotating shaft (8).

2. The square blind hole punching device for a plastic shell according to claim 1, characterized in that: The control assembly includes a connecting rod (15). The side wall of the connecting rod (15) is fixedly connected to the side wall of the slider (13). One end of the connecting rod (15) is rotatably connected to a connecting plate (17). On the side wall of the rotating shaft (8), a synchronous plate (16) is rotatably connected. One side of the connecting plate (17) is rotatably connected to the side wall of the synchronous plate (16). On the side wall of the rotating shaft (8), a turntable (18) is fixedly connected.

3. The square blind hole punching device for plastic housing according to claim 2, characterized in that: The upper central block (9) is fixedly connected inside the second mounting plate (5). The upper slider (13), clamping plate (14), and connecting rod (15) are all slidably connected inside the second mounting plate (5). The lower central block (9) is fixedly connected inside the first mounting plate (2). The lower slider (13), clamping plate (14), and connecting rod (15) are all slidably connected inside the first mounting plate (2).

4. The square blind hole punching device for plastic outer shell according to claim 3, characterized in that: The lower clamping plate (14) is slidably connected in the slot (28) formed inside the upper knife fixing plate (7), and the lower clamping plate (14) is slidably connected in the slot (28) formed inside the lower fixing plate (6).

5. The square blind hole punching device for a plastic shell according to claim 1, characterized in that: On the lower surface of the upper knife fixing plate (7), a precision guide post (19) is arranged. On the lower surface of the upper knife fixing plate (7), a limit post (21) is arranged. The limit post (21) is arranged between the precision guide posts (19).

6. The square blind hole punching device for a plastic shell according to claim 5, characterized in that: On the lower surface of the upper knife fixing plate (7), a plurality of square cutters (20) are arranged. Inside each square cutter (20), a pusher pin (24) is arranged. On the lower surface of the upper knife fixing plate (7), a plurality of suction cups (23) are arranged. On the lower surface of the upper knife fixing plate (7), a plurality of linear bearings (22) are arranged.

7. The square blind hole punching device for plastic housing according to claim 5, characterized in that: On the upper surface of the lower fixing plate (6), a product fixing fixture (25) is arranged. Inside the product fixing fixture (25), a lower cutter (26) is arranged. Inside the lower fixing plate (6), a stamping ball bushing (27) is arranged.

8. The square blind hole punching device for a plastic shell according to claim 7, wherein: The side wall of the limit post (21) is slidably connected to the inside of the lower fixing plate (6), and the precision guide post (19) is slidably connected to the inside of the stamping ball guide sleeve (27).

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