Semi-shear type metal plate micro-connection punching device

Abstract

The invention discloses a semi-shear type metal plate micro-connection punching device which comprises an upper die body, a lower die body, a lower die body and a punching pin. The upper die cover is arranged on the movable groove in a sliding mode, and a first receding hole corresponding to the bottom of the punching needle is formed in the upper die cover; an ejector pin is movably arranged in an ejector pin cavity in the lower die main body, a second avoiding hole which is communicated with the ejector pin cavity and corresponds to the top of the ejector pin is formed in the top of the lower die main body, a rotating groove is formed in the top of the ejector pin, and a supporting block is rotationally arranged in the rotating groove; wherein the plate is placed between the upper die main body and the lower die main body, the plate is in butt joint with a sheet metal part of which the inner side is preliminarily formed through micro connection after multiple times of punching, the punching needle punches the joint of the micro connection and the sheet metal part, and the supporting block abuts against the surface of the micro connection during punching. The problems that an existing sheet metal part forming mode is complex in machining process, low in micro-continuous cutting operation efficiency and poor in sheet metal part forming quality can be solved.

Description

Technical Field

[0001] This invention relates to the field of punching and cutting equipment technology, specifically a semi-shear type sheet metal micro-connected punching and cutting device. Background Technology

[0002] Currently, the conventional sheet metal punching process involves using a punching die to gradually break off the connecting parts between the sheet metal and the sheet metal part in batches, leaving micro-connectors for the connection. At this point, the sheet metal part is initially formed. Then, tools such as shears are used to cut off the micro-connectors, and grinding equipment is used to remove any remaining joints on the sides of the sheet metal part, thus completing the processing. However, this conventional method results in a complex sheet metal forming process, low efficiency in cutting off the micro-connectors, and poor sheet metal part forming quality. Summary of the Invention

[0003] The purpose of this invention is to provide a semi-shear type sheet metal micro-connection punching device to solve the problems of complex processing flow, low efficiency of micro-connection cutting operation and poor sheet metal forming quality in existing sheet metal forming methods.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a semi-shear type sheet metal micro-continuous punching device, comprising:

[0005] The upper mold body has a movable groove at its bottom, and the punch is assembled in the movable groove;

[0006] The upper mold cover is slidably disposed on the movable groove, and a first clearance hole corresponding to the bottom of the punch is provided on it;

[0007] The lower mold body has an ejector pin movably disposed in the ejector pin cavity therein. The top of the lower mold body is provided with a second clearance hole that communicates with the ejector pin cavity and corresponds to the top of the ejector pin. The top of the ejector pin is provided with a rotating groove, and a support block is rotatably disposed in the rotating groove.

[0008] The plate is placed between the upper mold body and the lower mold body. After multiple punching operations, it is connected to the preliminarily formed sheet metal part inside by a micro-connector. The punching is performed at the connection between the micro-connector and the sheet metal part. During this process, the support block abuts against the surface of the micro-connector.

[0009] As a further description of the above technical solution:

[0010] The top of the upper mold body is provided with a first countersunk hole that communicates with the movable groove, and a first stud is inserted into the first countersunk hole and screwed into the screw hole at the top of the punch.

[0011] As a further description of the above technical solution:

[0012] The bottom surface of the punch is wedge-shaped, and its lower end extends toward the sheet metal part.

[0013] As a further description of the above technical solution:

[0014] A second stud is screwed onto the upper mold cover, and the upper end of the second stud slides into the second countersunk hole of the upper mold body.

[0015] As a further description of the above technical solution:

[0016] A first spring is provided between the movable groove and the upper mold cover.

[0017] As a further description of the above technical solution:

[0018] The lower mold body includes a lower shell and an upper shell. The lower shell and the upper shell are joined together at the end faces and fixed by bolts. Their enclosure forms the ejector cavity. A second spring is provided between the ejector pin and the ejector cavity.

[0019] As a further description of the above technical solution:

[0020] The bottom of the upper housing is provided with a third countersunk hole, and the top of the lower housing is embedded in the third countersunk hole.

[0021] As a further description of the above technical solution:

[0022] An exhaust port is provided through the lower housing.

[0023] As a further description of the above technical solution:

[0024] The surface of the rotating groove and the bottom surface of the support block are cylindrical curved surfaces or spherical surfaces. The ejector pin is fitted with a sleeve on the outside of the micro connector, and the rotating shaft on the side of the support block rotatably passes through the sleeve.

[0025] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0026] The punching device of the present invention is used to punch off the micro-connectors that connect the sheet metal parts after multiple punchings and preliminary forming. It adopts a semi-shear punching design, with the punching point located at the connection between the micro-connector and the sheet metal part. This ensures that there are no micro-connection points on the side of the sheet metal part after the micro-connector is punched off. Compared with the conventional method of cutting the micro-connector with tools such as pliers and then removing the connection points of the micro-connector on the sheet metal part, it can simplify the sheet metal forming process and improve the forming quality of the sheet metal part. In use, the sheet metal is placed between the upper and lower die bodies, aligning the micro connector with the clearance holes on the top and bottom. Then, the upper die is driven closer to the lower die. After the lower die body clamps the sheet metal with the upper die cover, the upper die cover is pressed into the movable groove, exposing the punch and punching the connection between the micro connector and the sheet metal. During this process, the top surface of the support block is always in contact with the bottom surface of the micro connector. As the punch punches the micro connector and tilts it into the rotating groove, the side of the support block away from the sheet metal lifts up and pushes the micro connector upward, forming an axial pulling force on the micro connector. This force, combined with the punching force of the punch on the end face of the micro connector, accelerates the separation of the micro connector from the sheet metal, improves punching efficiency and punching quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This describes the usage state of a semi-shear type sheet metal micro-connected punching device. Figure 1 .

[0029] Figure 2 This describes the usage state of a semi-shear type sheet metal micro-connected punching device. Figure 2 .

[0030] Figure 3 This is a diagram showing the usage status of the punch and ejector pin in a semi-shear type sheet metal micro-connected punching device.

[0031] Figure 4 This is a schematic diagram of the structure of a sheet metal part processed by a semi-shear type sheet metal micro-connected punching device.

[0032] Legend:

[0033] 1. Upper mold body; 2. Movable groove; 3. Punch; 4. Upper mold cover; 5. First clearance hole; 6. Lower mold body; 7. Ejector pin; 8. Second clearance hole; 9. Rotating groove; 10. Support block; 11. First countersunk hole; 12. First stud; 13. Second stud; 14. Second countersunk hole; 15. First spring; 16. Lower housing; 17. Upper housing; 18. Bolt; 19. Second spring; 20. Third countersunk hole; 21. Vent hole; 100. Plate part; 200. Sheet metal part; 300. Micro connector. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Please see Figure 1-4This invention provides a technical solution: a semi-shear type sheet metal micro-continuous punching device, comprising:

[0040] The upper mold body 1 has a movable groove 2 at its bottom, and the punch 3 is assembled in the movable groove 2;

[0041] The upper mold cover 4 is slidably disposed on the movable groove 2, and a first clearance hole 5 corresponding to the bottom of the punch 3 is provided on it;

[0042] The lower mold body 6 has an ejector pin 7 movably disposed in the ejector pin cavity therein. The top of the lower mold body 6 is provided with a second clearance hole 8 that communicates with the ejector pin cavity and corresponds to the top of the ejector pin 7. The top of the ejector pin 7 is provided with a rotating groove 9, and a support block 10 is rotatably disposed in the rotating groove 9.

[0043] The plate 100 is placed between the upper mold body 1 and the lower mold body 6. After multiple punching operations, it connects with the preliminarily formed sheet metal part 200 through the micro connector 300. The punch 3 punches the connection between the micro connector 300 and the sheet metal part 200. During this process, the support block 10 abuts against the surface of the micro connector 300.

[0044] The punching device of the present invention is used to punch off the micro-connectors that connect the sheet metal parts after multiple punchings and preliminary forming. It adopts a semi-shear punching design, with the punching point located at the connection between the micro-connector and the sheet metal part. This ensures that there are no micro-connection points on the side of the sheet metal part after the micro-connector is punched off. Compared with the conventional method of cutting the micro-connector with tools such as pliers and then removing the connection points of the micro-connector on the sheet metal part, it can simplify the sheet metal forming process and improve the forming quality of the sheet metal part. In use, the sheet metal is placed between the upper and lower die bodies, aligning the micro connector with the clearance holes on the top and bottom. Then, the upper die is driven closer to the lower die. After the lower die body clamps the sheet metal with the upper die cover, the upper die cover is pressed into the movable groove, exposing the punch and punching the connection between the micro connector and the sheet metal. During this process, the top surface of the support block is always in contact with the bottom surface of the micro connector. As the punch punches the micro connector and tilts it into the rotating groove, the side of the support block away from the sheet metal lifts up and pushes the micro connector upward, forming an axial pulling force on the micro connector. This force, combined with the punching force of the punch on the end face of the micro connector, accelerates the separation of the micro connector from the sheet metal, improves punching efficiency and punching quality.

[0045] The top of the upper die body 1 is provided with a first countersunk hole 11 that communicates with the movable groove 2. A first stud 12 passes through the first countersunk hole 11 and is screwed and fixed to the screw hole on the top of the punch 3. The bottom surface of the punch 3 is wedge-shaped, with its lower end extending toward the sheet metal part 200. This facilitates the disassembly and replacement of the punch 3, ensuring punching strength and punching stability. In use, the first stud 12 is unscrewed from the punch 3, allowing the punch 3 to be removed downwards for replacement and maintenance.

[0046] A second stud 13 is screwed onto the upper mold cover 4, and the upper end of the second stud 13 slides into the second countersunk hole 14 of the upper mold body 1. A first spring 15 is provided between the movable groove 2 and the upper mold cover 4. Thus, the sliding guidance effect of the second stud 13 and the second countersunk hole 14, as well as the outward elastic force applied by the first spring 15 to the upper mold cover 4, can improve the stability of the upper mold cover 4 in the movable groove 2.

[0047] The lower die body 6 includes a lower shell 16 and an upper shell 17. The lower shell 16 and the upper shell 17 are joined together at their end faces and fixed by bolts 18, forming the ejector cavity. A second spring 19 is provided between the ejector pin 7 and the ejector cavity. A third countersunk hole 20 is provided at the bottom of the upper shell 17, and the top of the lower shell 16 is embedded in the third countersunk hole 20 to improve assembly strength and tightness. A vent hole 21 is provided through the lower shell 16. The lower die body 6 adopts a split and detachable design to facilitate the replacement and maintenance of components such as the ejector pin 7 in the ejector cavity, so as to adapt to the punching operation of micro-connectors 300 on plates 100 of different sizes. The second spring 19 can apply a stable elastic force to the ejector pin 7, so that it can push the plate 100 out after punching for material removal. The vent hole 21 can ensure stable internal pressure in the ejector cavity.

[0048] The surface of the rotating groove 9 and the bottom surface of the support block 10 are cylindrical curved surfaces or spherical surfaces. The ejector pin 7 is provided with a sleeve (not shown in the figure) on the outside of the micro connector 300, and the rotating shaft on the side of the support block 10 is rotatably inserted through the sleeve. This ensures that the support block 10 rotates stably within the rotating groove 9.

[0049] The working principle of a semi-shear type sheet metal micro-connecting punching device in this embodiment includes: during use, the sheet metal 100 is placed between the upper die body 1 and the lower die body 6, so that the micro-connector 300 is aligned with the upper and lower clearance holes, specifically as follows: Figure 1 As shown; then, the upper die is driven to approach the lower die, and after the lower die body 6 clamps the plate 100 with the upper die cover 4, the upper die cover 4 is pressed into the movable groove 2, causing the punch 3 to be exposed and punching the connection between the micro connector 300 and the sheet metal part 200, specifically as follows. Figure 2 As shown, during this process, the top surface of the support block 10 always abuts against the bottom surface of the micro connector 300. As the punch 3 cuts the micro connector 300 and tilts it into the rotating groove 9, the side of the support block 10 away from the sheet metal part 200 tilts up and lifts a portion of the micro connector 300 upward, forming an axial pulling force on the micro connector 300. This force complements the punching force of the punch 3 on the end face of the micro connector 300, accelerating the separation of the micro connector 300 from the sheet metal part 200, improving punching efficiency and punching forming quality. Specifically, as shown... Figure 3 As shown.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A semi-shear type sheet metal micro-continuous punching device, characterized in that, include: The upper mold body has a movable groove at its bottom, and the punch is assembled in the movable groove; The upper mold cover is slidably disposed on the movable groove, and a first clearance hole corresponding to the bottom of the punch is provided on it; The lower mold body has an ejector pin movably disposed in the ejector pin cavity therein. The top of the lower mold body is provided with a second clearance hole that communicates with the ejector pin cavity and corresponds to the top of the ejector pin. The top of the ejector pin is provided with a rotating groove, and a support block is rotatably disposed in the rotating groove. The plate is placed between the upper mold body and the lower mold body. After multiple punching operations, it is connected to the preliminarily formed sheet metal part inside by a micro-connector. The punching is performed at the connection between the micro-connector and the sheet metal part. During this process, the support block abuts against the surface of the micro-connector.

2. The semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, The top of the upper mold body is provided with a first countersunk hole that communicates with the movable groove, and a first stud is inserted into the first countersunk hole and screwed into the screw hole at the top of the punch.

3. The semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, The bottom surface of the punch is wedge-shaped, and its lower end extends toward the sheet metal part.

4. The semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, A second stud is screwed onto the upper mold cover, and the upper end of the second stud slides into the second countersunk hole of the upper mold body.

5. A semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, A first spring is provided between the movable groove and the upper mold cover.

6. A semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, The lower mold body includes a lower shell and an upper shell. The lower shell and the upper shell are joined together at the end faces and fixed by bolts. Their enclosure forms the ejector cavity. A second spring is provided between the ejector pin and the ejector cavity.

7. A semi-shear type sheet metal micro-continuous punching device according to claim 6, characterized in that, The bottom of the upper housing is provided with a third countersunk hole, and the top of the lower housing is embedded in the third countersunk hole.

8. A semi-shear type sheet metal micro-continuous punching device according to claim 6, characterized in that, An exhaust port is provided through the lower housing.

9. A semi-shear type sheet metal micro-continuous punching device according to claim 1, characterized in that, The surface of the rotating groove and the bottom surface of the support block are cylindrical curved surfaces or spherical surfaces.

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