A structure for punching a small hole

Abstract

The utility model relates to the field of fin production equipment, concretely relates to a punch small hole structure, including upper backing plate, upper backing plate is installed in the upper die plate bottom surface, the upper backing plate below is pasted with male die fixed plate, installs the punch male die in male die fixed plate, male die fixed plate below installs male die limiting plate, punch female die is correspondingly equipped below punch male die, the top surface of lower die plate is installed with female die fixed plate, punch female die is vertically movable and is installed on female die fixed plate, be equipped with the first height adjusting mechanism that controls punch female die up and down movement in lower die plate, female die fixed plate top installs the first pressing plate that prevents punch female die from falling off, first pressing plate top is equipped with the first discharge plate of adjustable height, punch female die outside is equipped with second spring, and second spring is located between first discharge plate, first pressing plate.

Description

Technical Field

[0001] This utility model relates to the field of fin production equipment, and specifically to a punching small hole structure. Background Technology

[0002] Because stainless steel is hard and has a high springback coefficient, the traditional punching and one-time flanging forming structure is used. During the one-time flanging forming, the material and the punching die are held together by a great force, which causes plastic deformation of the forming end of the punching die. When the punch enters the die, it causes chipping, which causes cracks in the fin opening. This leads to secondary flanging cracking. After the product expands, copper leakage from the fins occurs, resulting in defective products that are scrapped. The long-term deformation of the forming end of the punching die also accelerates the wear of the punch and die. Utility Model Content

[0003] The purpose of this invention is to provide a punching structure to solve the above problems. By improving the process and changing the structure of the punching process, the wear on the punching dies is reduced, and the production quality of the fins is improved.

[0004] To achieve the above objectives, this utility model provides the following solution: A punching structure includes an upper pad plate mounted on the bottom surface of an upper template. A punch fixing plate is attached to the lower surface of the upper pad plate, and a punching punch is installed inside the punch fixing plate. A punch limiting plate is installed below the punch fixing plate to prevent the punching punch from falling off. A punching die is correspondingly provided below the punching punch. A die fixing plate is installed on the top surface of a lower template, and the punching die is vertically and movably mounted on the die fixing plate. A first height adjustment mechanism is provided inside the lower template to control the up and down movement of the punching die. A first pressure plate is installed above the die fixing plate to prevent the punching die from falling off. A first height-adjustable stripper plate is provided above the first pressure plate. A second spring is sleeved on the outside of the punching die, and the second spring is located between the first stripper plate and the first pressure plate.

[0005] Preferably, the first height adjustment mechanism includes a first wedge, on which a scrap sleeve is mounted. The punching die abuts against the top surface of the scrap sleeve. The punching die passes through the first unloading plate and the first pressure plate. The second spring is sleeved on the outside of the punching die. The lower end of the second spring abuts against the shoulder of the punching die, and the top end of the second spring abuts against a clearance hole in the first unloading plate. The clearance hole matches the size of the shoulder of the punching die to ensure that the shoulder of the punching die can move up and down.

[0006] Preferably, the first wedge includes a plurality of first upper wedges and a plurality of first lower wedges, the plurality of first upper wedges are interconnected by steps, adjacent first lower wedges are interconnected by hooks, and the first lower wedges are connected to a lower wedge driving component.

[0007] Preferably, the waste discharge sleeve is installed on one of the first upper inclined wedges, and the waste discharge sleeve passes through one of the first lower inclined wedges. The corresponding first lower inclined wedge has an oval hole, and the length direction of the oval hole is the movement direction of the first lower inclined wedge.

[0008] Preferably, the lower wedge driving component includes a first adjusting screw threadedly connected to one side of the first lower wedge, the other end of the first adjusting screw being connected to the output shaft of a first digital display lead screw motor, the first digital display lead screw motor being mounted on the lower template, the first adjusting screw being horizontally positioned, and the inclined surfaces of the first upper wedge and the first lower wedge being in sliding engagement.

[0009] Preferably, a first spring is installed inside the upper template 1, and the bottom end of the first spring abuts against a discharge rod, which passes through the upper pad, the punch fixing plate, and the punch limiting plate.

[0010] This utility model has the following technical effects: This invention modifies the forming process, punching is performed first after forming, and then the subsequent stretching operation is carried out. This avoids the simultaneous punching and stretching process in the traditional process, thereby reducing the wear of the punching dies. Because punching is performed first, sufficient ductility is provided for the stretching process, avoiding hole breakage during stretching, and providing a good foundation for the production of finished fins. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figures 1 to 2 As shown, this embodiment provides A punching structure includes an upper pad 2, which is installed on the bottom surface of an upper template 1. A punch fixing plate 3 is attached to the lower part of the upper pad 2, and a punching punch 11 is installed inside the punch fixing plate 3. A punch limiting plate 4 is installed below the punch fixing plate 3 to prevent the punching punch 11 from falling. A punching die 9 is correspondingly provided below the punching punch 11. A die fixing plate 7 is installed on the top surface of a lower template 8. The punching die 9 is vertically and movably installed on the die fixing plate 7. A first height adjustment mechanism for controlling the up and down movement of the punching die 9 is provided inside the lower template 8. A first pressure plate 6 for preventing the punching die 9 from falling off is installed above the die fixing plate 7. A first unloading plate 5 with adjustable height is provided above the first pressure plate 6. A second spring 16 is sleeved on the outside of the punching die 9 and is located between the first unloading plate 5 and the first pressure plate 6.

[0016] Further optimization of the scheme: the first height adjustment mechanism includes a first inclined wedge 12, on which a scrap sleeve 43 is installed. The punching die 9 abuts against the top surface of the scrap sleeve 43. The punching die 9 passes through the first unloading plate 5 and the first pressure plate 6. The second spring 16 is sleeved on the outside of the punching die 9. The lower end of the second spring 16 abuts against the shoulder of the punching die 9, and the top end of the second spring 16 abuts against the clearance hole opened in the first unloading plate 5. The clearance hole matches the size of the shoulder of the punching die 9 to ensure that the shoulder of the punching die 9 can move up and down.

[0017] In a further optimized design, the first wedge 12 includes several first upper wedges 13 and several first lower wedges 14. The several first upper wedges 13 are interconnected by steps, and adjacent first lower wedges 14 are interconnected by hooks. The first lower wedges 14 are connected to a lower wedge driving component.

[0018] In a further optimized design, the waste material discharge sleeve 43 is installed on one of the first upper inclined wedges 13, and the waste material discharge sleeve 43 passes through one of the first lower inclined wedges 14. The corresponding first lower inclined wedge 14 has an oval opening, and the length direction of the oval opening is the movement direction of the first lower inclined wedge 14.

[0019] The scheme is further optimized. The lower wedge drive component includes a first adjusting screw 18 threadedly connected to one side of the first lower wedge 14. The other end of the first adjusting screw 18 is connected to the output shaft of the first digital display lead screw motor 17. The first digital display lead screw motor 17 is mounted on the lower template 8. The first adjusting screw 18 is set horizontally. The inclined surfaces of the first upper wedge 13 and the first lower wedge 14 are in sliding engagement.

[0020] Further optimization of the scheme: a first spring 15 is installed inside the upper template 1, and the bottom end of the first spring 15 abuts against the unloading rod 15.4. The unloading rod 15.4 passes through the upper pad 2, the punch fixing plate 3 and the punch limiting plate 4.

[0021] In the actual pressing process, this utility model, by sending the sheet metal from the drawing station, controls the rotation of the first digital display lead screw motor 17 to drive the first adjusting screw 18 to rotate. The first adjusting screw 18 then drives the first lower wedge 14 to achieve horizontal displacement. The first lower wedge 14 can push the first upper wedge 13 to move up and down, further driving the scrap sleeve 43 and the punching die 9 to achieve corresponding up and down movements. This allows the height of the punching die 9 to adapt to the final drawing height. As the upper template 1 is pressed down, the punching punch 11 first presses out a small hole, and then performs straightening in the subsequent process. Compared to the traditional punching and straightening process, where punching is performed first and then straightening, there is a separation between the two processes. After the sheet metal leaves the punching process, some of the stress on the sheet metal itself is released due to the punching. When straightening is performed, compared to the traditional process, the forming effect of the sheet metal is better, avoiding sheet metal deformation caused by complex stress, thereby reducing the wear of the punching die and further improving the quality of the finished fins.

[0022] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0023] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A pierce hole structure, characterized by, Includes an upper pad (2), which is installed on the bottom surface of the upper template (1). A punch fixing plate (3) is attached to the lower part of the upper pad (2). A punching punch (11) is installed inside the punch fixing plate (3). A punch limiting plate (4) is installed below the punch fixing plate (3). The punch limiting plate (4) is used to limit the punching punch (11) from falling. A punching die (9) is provided below the punching punch (11). A die fixing plate (7) is installed on the top surface of the lower template (8). (9) Vertically mounted on the die fixing plate (7), the lower template (8) is provided with a first height adjustment mechanism to control the up and down movement of the punching die (9), a first pressure plate (6) is installed above the die fixing plate (7) to prevent the punching die (9) from falling off, a first unloading plate (5) with adjustable height is provided above the first pressure plate (6), a second spring (16) is sleeved on the outside of the punching die (9), and the second spring (16) is located between the first unloading plate (5) and the first pressure plate (6).

2. The punching structure according to claim 1, characterized in that, The first height adjustment mechanism includes a first wedge (12), on which a scrap sleeve (43) is installed. The punching die (9) abuts against the top surface of the scrap sleeve (43). The punching die (9) passes through the first unloading plate (5) and the first pressure plate (6). The second spring (16) is sleeved on the outside of the punching die (9). The lower end of the second spring (16) abuts against the shoulder of the punching die (9). The top end of the second spring (16) abuts against the clearance hole opened in the first unloading plate (5). The clearance hole matches the size of the shoulder of the punching die (9) to ensure that the shoulder of the punching die (9) can move up and down.

3. The punching structure according to claim 2, characterized in that, The first wedge (12) includes a plurality of first upper wedges (13) and a plurality of first lower wedges (14). The plurality of first upper wedges (13) are connected to each other by steps, and adjacent first lower wedges (14) are connected to each other by hooks. The first lower wedges (14) are connected to a lower wedge driving component.

4. The punching structure according to claim 3, characterized in that, The waste discharge sleeve (43) is installed on one of the first upper inclined wedges (13), and the waste discharge sleeve (43) passes through one of the first lower inclined wedges (14). The corresponding first lower inclined wedge (14) has an oval hole, and the length direction of the oval hole is the movement direction of the first lower inclined wedge (14).

5. The punching structure according to claim 3, characterized in that, The lower wedge drive component includes a first adjusting screw (18) threadedly connected to one side of the first lower wedge (14), and the other end of the first adjusting screw (18) is connected to the output shaft of a first digital display lead screw motor (17). The first digital display lead screw motor (17) is mounted on the lower template (8). The first adjusting screw (18) is horizontally set, and the inclined surfaces of the first upper wedge (13) and the first lower wedge (14) are in sliding engagement.

6. The punching structure according to claim 1, characterized in that, A first spring (15) is installed inside the upper template (1). The bottom end of the first spring (15) abuts against a material unloading rod (15.4). The material unloading rod (15.4) passes through the upper pad (2), the punch fixing plate (3), and the punch limiting plate (4).

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