Punching and cutting die

Abstract

The utility model provides a punching and cutting die which comprises a workbench, a lower die, an upper die, an elastic pressing plate, a cavity, a first through hole, a punching needle and a second through hole. The punching die is provided with the elastic pressing plate, when the upper die moves downwards, the elastic pressing plate moves downwards and tightly presses the product to be punched, then the upper die continues to move downwards to drive the punching needle to move downwards, the punching needle conducts the punching procedure on the product to be punched, and when the punching needle enters the second through hole, punching of the product to be punched is completed; therefore, the mode that a punching tool in the prior art needs more ejector pins to stabilize the to-be-blanked product is replaced by the mode that the to-be-blanked product is stabilized through the elastic pressing plate, debugging of the multiple ejector pins is not needed, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a punching and cutting mold. Background Art

[0002] At present, in the production of automobile underbody guards, after the automobile underbody guards are hot-pressed, they need to be punched and cut. The existing punching method generally adopts the mode of punching tooling, that is, the underbody guard is placed on the workbench and then fixed, and then a number of punching needles are fixed on the cylinder and aligned with the positions where punching is required, and then the cylinder is started to punch it; during the punching process, it is necessary to use ejector pins to further fix the underbody guard near the punching holes to ensure the punching quality of the underbody guard; however, due to the different positions of the holes on the underbody guard and the large number of punching holes, more ejector pins are needed for stabilization, and the number is large; and since the heights of the different positions of the underbody guard are different, it is inconvenient to debug the ejector pins, which is too troublesome. Utility Model Content

[0003] The purpose of the present invention is to design a punching and cutting die to solve the problems raised by the background technology. To achieve the above purpose, the present invention provides the following technical solutions: comprising a lower die fixed on a workbench and cooperating with the product to be punched, and an upper die fixed to the moving end of a hydraulic press, wherein the bottom of the upper die is slidably connected to an elastic pressure plate, a spring is installed between the elastic pressure plate and the upper die, the bottom of the elastic pressure plate is a cavity cooperating with the product to be punched, the cavity is provided with a plurality of first through holes aligned with the punching positions of the product to be punched, a punching needle aligned with the first through hole is fixed to the bottom of the upper die, and a second through hole aligned with the first through hole is provided on the lower die.

[0004] Furthermore, the bottom of the lower mold is provided with a plurality of first through grooves communicating with the second through holes, a material receiving frame is fixedly connected to the first through grooves, and the second through holes are aligned with the interior of the material receiving frame.

[0005] Furthermore, a plurality of guide plates are provided on the side walls of the first through slot for guiding the waste materials falling from the second through holes located at the edge of the first through slot into the interior of the material receiving frame.

[0006] Furthermore, a limiting column is fixedly connected to the lower mold, and a limiting platform is provided on the upper mold, which is in close contact with the limiting column.

[0007] Furthermore, a sliding rod is fixed to the upper mold, and a sliding column is provided on the top of the elastic pressure plate which is slidably connected to the sliding rod. The spring is sleeved on the outer circle of the sliding rod, and the two ends of the spring are respectively connected to the top of the sliding column and the bottom of the upper mold.

[0008] Furthermore, the two ends of the spring are respectively in close contact with the top of the sliding column and the bottom of the upper mold, and the elastic pressure plate is connected to the upper mold through a limiting component.

[0009] Furthermore, the limiting assembly includes a limiting block installed on the upper mold, a movable column slidably connected to the limiting block, the movable column passes through the upper mold and is fixed to the top of the elastic pressure plate, the limiting block is provided with a second through groove, and the movable column is provided with a first notch that is attached to the side wall of the second through groove and can move up and down.

[0010] Furthermore, a third through hole is provided at the end of the second through groove, which is clearance-matched with the outer circle of the movable column. The limit block is slidably connected to the upper mold. A connecting rod is fixed on the limit block, and the connecting rod is fixed to the upper mold through a fixed block detachably mounted on the side wall of the upper mold.

[0011] Furthermore, a handle is provided in the middle of the connecting rod.

[0012] Furthermore, there are four limit blocks symmetrically distributed, and the connecting rod includes a vertical rod connecting the limit blocks on the same side and a horizontal rod for connecting the vertical rods on different sides. The handle is provided on the horizontal rod, and the fixing block is provided with a second notch to prevent the horizontal rod from moving.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model is provided with an elastic pressure plate. When the upper mold moves downward, the elastic pressure plate moves downward and presses the bottom guard plate tightly. Then the upper mold continues to move downward, driving the punch needle to move downward. The punch needle will punch the bottom guard plate. When the punch needle enters the second through hole, the punching of the bottom guard plate is completed. Therefore, the utility model replaces the existing technology of using more ejectors to stabilize the bottom guard plate by stabilizing the bottom guard plate with the elastic pressure plate. There is no need to debug multiple ejectors, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the product to be punched;

[0018] Figure 3 It is a partially enlarged schematic diagram of the utility model;

[0019] Figure 4 This is an enlarged schematic diagram of a partial top view after the upper mold is hidden;

[0020] Figure 5 It is a partial cross-sectional schematic diagram of the utility model;

[0021] Figure 6 It is a cross-sectional schematic diagram of the limiting component.

[0022] Among them: 1. Upper die; 2. Lower die; 3. Workbench; 4. Product to be punched; 5. Limiting assembly; 6. First notch; 7. Third through hole; 8. Limiting block; 9. Vertical rod; 10. Horizontal rod; 11. Handle; 12. Fixed block; 13. Moving column; 14. Elastic pressure plate; 15. Punch needle; 16. Second through slot; 17. First through hole; 18. Spring; 19. Sliding rod; 20. Second through hole; 21. Material receiving frame; 22. First through slot. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0024] Example: Please refer to Figure 1-6The bottom of the upper die 1 is slidably connected to the bottom of the upper die 1 and is provided with a spring 18. The bottom of the upper die 1 is slidably connected to the bottom of the upper die 1 and is provided with a spring 18. The bottom of the elastic pressure plate 14 is a cavity that cooperates with the product 4 to be punched, and a plurality of first through holes 17 are provided on the cavity that are aligned with the punching positions of the product 4 to be punched. The bottom of the upper die 1 is fixed with a punching needle 15 that is aligned with the first through holes 17, and the lower die 2 is provided with a second through hole 20 that is aligned with the first through holes 17. The main bodies of the upper die 1 and the lower die 2 adopt a structure similar to that of a hot pressing die, such as a similar guide structure (to enable the upper die 1 to move accurately and stably toward the lower die 2), a similar installation method to the fixed table, a similar installation method to the mobile end, etc., which will not be described in detail here; the product 4 to be punched is the bottom guard plate after the hot pressing process; when the product 4 to be punched needs to be processed When punching, it is only necessary to place the product 4 to be punched on the lower die 2, and then the hydraulic press is started, and the upper die 1 moves downward, so that the elastic pressure plate 14 moves down and fits with the upper surface of the product 4 to be punched, and then the hydraulic press continues to start, so that the spring 18 is compressed, and the elastic pressure plate 14 is pressed tightly against the product 4 to be punched, and then the hydraulic press continues to start, and the upper die 1 continues to move downward, thereby driving the punching needle 15 to continue to move downward, and the punching needle 15 will pass through the first through hole 17 and perform the punching process on the compressed product 4 to be punched. When the punching needle 15 enters the second through hole 20, the punching of the product 4 to be punched is completed. At this time, the hydraulic cylinder is started in reverse, and the punching needle 15 moves up. When the elastic pressure plate 14 leaves the product 4 to be punched, the entire punching process is completed; therefore, the present invention replaces the punching tooling in the prior art that requires more ejectors to stabilize the product 4 to be punched by the elastic pressure plate 14, and there is no need to debug multiple ejectors, and the operation is simple.

[0025] In this embodiment, the bottom of the lower mold 2 is provided with a plurality of first through grooves 22 connected with the second through holes 20, and a material receiving frame 21 is fixedly connected to the first through grooves 22, and the second through holes 20 are aligned with the inside of the material receiving frame 21, so as to realize the collection of punching waste; and the side walls of the first through grooves 22 are provided with a plurality of guide plates for the waste falling from the second through holes 20 located at the edge of the first through grooves 22 to fall into the inside of the material receiving frame 21, so as to prevent the waste from falling out of the material receiving frame 21; and a limiting column is fixedly connected to the lower mold 2, and a limiting platform is provided on the upper mold 1 that is in close contact with the limiting column, wherein the limiting column is a rubber column, which prevents the upper mold 1 from rigidly colliding with the lower mold 2 and improves the service life of the upper mold 1 and the lower mold 2; and a sliding rod is fixedly connected to the upper mold 1 19. A sliding column slidably connected to the sliding rod 19 is provided at the top of the elastic pressure plate 14. A spring 18 is sleeved on the outer circle of the sliding rod 19, and the two ends of the spring 18 are respectively connected to the top of the sliding column and the bottom of the upper mold 1, thereby ensuring the stable movement of the elastic pressure plate 14 in the vertical direction; the two ends of the spring 18 are respectively tightly attached to the top of the sliding column and the bottom of the upper mold 1, and the elastic pressure plate 14 is connected to the upper mold 1 through a limit assembly 5; the limit assembly 5 includes a limit block 8 mounted on the upper mold 1, a moving column 13 slidably connected to the limit block 8, the moving column 13 passes through the upper mold 1 and is fixed to the top of the elastic pressure plate 14, the limit block 8 is provided with a second through groove 16, and the moving column 13 is provided with a second through groove 16 The first notch 6 is attached to the side wall and can move up and down. At this time, the two end faces of the spring 18 are only in close contact with the elastic pressure plate 14 and the upper mold 1, which facilitates the assembly of the structure. At the same time, under the action of the spring 18, the top of the first notch 6 is in close contact with the upper surface of the limit block 8. At this time, the distance between the elastic pressure plate 14 and the upper mold 1 is the largest, and as the elastic pressure plate 14 increases the extrusion of the product 4 to be punched, the distance between the elastic pressure plate 14 and the upper mold 1 decreases, and the first notch 6 moves upward relative to the second through slot 16; and the end of the second through slot 16 is provided with a third through hole 7 that matches the outer circle clearance of the moving column 13, the limit block 8 is slidably connected to the upper mold 1, and a connecting rod is fixed to the limit block 8. It is fixed to the upper mold 1 through a fixing block 12 that is detachably mounted on the side wall of the upper mold 1, wherein the detachable mounting method can be in the form of a bolt connection. When the fixing block 12 is removed, the connecting rod can be pulled outward. At this time, the third through hole 7 will be aligned with the outer circle of the movable column 13, and the elastic pressure plate 14 can be disassembled and assembled. A handle 11 is provided in the middle of the connecting rod to facilitate the operation of the connecting rod. There are four limit blocks 8 symmetrically distributed, and the connecting rod includes a vertical rod 9 connecting the limit blocks 8 on the same side and a horizontal rod 10 for connecting the vertical rods 9 on different sides. A handle 11 is provided on the horizontal rod 10, and a second notch is provided on the fixing block 12 to prevent the horizontal rod 10 from moving, so that the elastic pressure plate 14 is stably connected to the upper mold 1 while facilitating its disassembly and assembly.

[0026] Working principle: When it is necessary to punch a hole in the product 4 to be punched, the cross bar 10 is pushed in so that the first notch 6 matches the second notch, and then the fixing block 12 is installed on the side wall of the upper die 1, and the cross bar 10 is placed in the second notch; then the product 4 to be punched is placed on the lower die 2, and the hydraulic press is started, the upper die 1 will move downward, so that the elastic pressure plate 14 moves downward and fits the upper surface of the product 4 to be punched, and then the hydraulic press continues to start, so that the spring 18 is compressed, and then the elastic pressure plate 14 presses the product 4 to be punched, and then the hydraulic press continues to start, and the upper die 1 continues to move downward. The punching needle 15 moves downward, thereby driving the punching needle 15 to continue to move downward. The punching needle 15 will pass through the first through hole 17 and perform the punching process on the compacted product 4 to be punched. When the punching needle 15 enters the second through hole 20, the punching of the product 4 to be punched is completed. At this time, the hydraulic cylinder starts in the reverse direction and the punching needle 15 moves upward. When the elastic pressure plate 14 leaves the product 4 to be punched, the entire punching process is completed. Therefore, the present invention replaces the punching tooling in the prior art that requires more ejectors to stabilize the product 4 to be punched by the elastic pressure plate 14. There is no need to debug multiple ejectors, and the operation is simple.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "upper," "lower," "left," "right," "front," "rear," and similar expressions used herein are for illustrative purposes only.

[0028] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A punching and cutting die, comprising a lower die (2) fixed on a workbench (3) and cooperating with a product (4) to be punched, and an upper die (1) fixed on a movable end of a hydraulic press, characterized in that: The bottom of the upper mold (1) is slidably connected to an elastic pressure plate (14), a spring (18) is installed between the elastic pressure plate (14) and the upper mold (1), the bottom of the elastic pressure plate (14) is a cavity that matches the product to be punched (4), and the cavity is provided with a plurality of first through holes (17) aligned with the punching positions of the product to be punched (4), the bottom of the upper mold (1) is fixed with a punching needle (15) aligned with the first through hole (17), and the lower mold (2) is provided with a second through hole (20) aligned with the first through hole (17).

2. The punching and cutting die according to claim 1, characterized in that: The bottom of the lower mold (2) is provided with a plurality of first through grooves (22) communicating with the second through holes (20), a material receiving frame (21) is fixedly connected to the first through grooves (22), and the second through holes (20) are aligned with the interior of the material receiving frame (21).

3. The punching and cutting die according to claim 2, characterized in that: A plurality of guide plates are provided on the side walls of the first through slot (22) for guiding waste materials falling from the second through holes (20) located at the edge of the first through slot (22) into the interior of the receiving frame (21).

4. The punching and cutting die according to claim 1, characterized in that: A limiting column is fixedly connected to the lower die (2), and a limiting platform tightly attached to the limiting column is provided on the upper die (1).

5. The punching and cutting die according to claim 1, characterized in that: A sliding rod (19) is fixedly connected to the upper mold (1), and a sliding column slidably connected to the sliding rod (19) is provided on the top of the elastic pressure plate (14). The spring (18) is sleeved on the outer circle of the sliding rod (19), and the two ends of the spring (18) are respectively connected to the top of the sliding column and the bottom of the upper mold (1).

6. The punching and cutting die according to claim 5, characterized in that: The two ends of the spring (18) are respectively in close contact with the top of the sliding column and the bottom of the upper mold (1), and the elastic pressure plate (14) and the upper mold (1) are connected via a limiting assembly (5).

7. The punching and cutting die according to claim 6, characterized in that: The limiting assembly (5) includes a limiting block (8) mounted on the upper mold (1), a movable column (13) slidably connected to the limiting block (8), the movable column (13) passing through the upper mold (1) and fixed to the top of the elastic pressure plate (14), the limiting block (8) is provided with a second through groove (16), and the movable column (13) is provided with a first notch (6) that is in contact with the side wall of the second through groove (16) and can move up and down.

8. The punching and cutting die according to claim 7, characterized in that: The end of the second through groove (16) is provided with a third through hole (7) which is in clearance with the outer circle of the movable column (13); the limit block (8) is slidably connected to the upper die (1); a connecting rod is fixed to the limit block (8); and the connecting rod is fixed to the upper die (1) through a fixed block (12) which is detachably mounted on the side wall of the upper die (1).

9. The punching and cutting die according to claim 8, characterized in that: A handle (11) is provided in the middle of the connecting rod.

10. The punching and cutting die according to claim 9, characterized in that: There are four symmetrically distributed limit blocks (8), and the connecting rod comprises a vertical rod (9) connected to the limit blocks (8) on the same side and a horizontal rod (10) for connecting the vertical rods (9) on different sides. The horizontal rod (10) is provided with the handle (11), and the fixing block (12) is provided with a second notch for preventing the horizontal rod (10) from moving.

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