Punching device for punching sheet machining

Abstract

The utility model relates to the technical field of punching equipment, in particular to a punching device for punching sheet processing, which comprises a rack, an upper die is arranged at the upper end of the rack, a lower die is arranged at the lower end of the rack, an air outlet is arranged on the inner wall of a die cavity of the lower die, an air transmission cavity is arranged in the lower die, and the air outlet is communicated with the air transmission cavity. Lifting grooves are formed in the flat portion of the upper surface of the lower die at intervals in the circumferential direction of the lower die, springs are arranged on the inner bottom walls of all the lifting grooves, supporting columns are arranged at the upper ends of the springs, one ends of the supporting columns are located in the lifting grooves and are in sliding fit with the lifting grooves, and the other ends of the supporting columns extend to the positions above the lifting grooves. And all the supporting columns can slide into the lifting grooves. According to the utility model, the displacement of the workpiece can be reduced when the workpiece and the lower die are purged.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping equipment, in particular to a stamping device for punching sheet processing. Background Art

[0002] The stamping manufacturing process is a common metal processing process used to produce various metal sheet parts. This process uses metal sheets as raw materials and forms them through stamping equipment and dies to produce metal sheets of various shapes. The stamping manufacturing process is efficient, precise and economical, and is widely used in the automotive, electronics, home appliances and other industries.

[0003] The stamping equipment used in punching processing is usually a press, which is a general-purpose press with a sophisticated structure. It has the characteristics of wide application and high production efficiency. The press can be widely used in cutting, punching, blanking, bending, riveting and forming processes. The metal is processed into parts by applying strong pressure to the metal blank to cause plastic deformation and fracture. Presses are divided into three categories: screw presses, crank presses and hydraulic presses. The press usually includes a frame, and a liftable upper die is set at the upper end of the frame, and a lower die is set at the lower end of the frame. The material to be stamped is placed in the lower die, and the upper die is driven down by the control system. The upper die and the lower die can perform stamping and forming processing on the material.

[0004] Some stamping equipment is also equipped with a blowing mechanism, which can blow away impurities on the surface of the workpiece to be processed to reduce damage to the mold during the stamping process. In addition, the blowing mechanism can demold the stamping product on the lower mold by blowing air into the lower mold, making it easier to remove the material.

[0005] In the related art, a workpiece to be processed is placed on a lower die. Some lower dies are relatively flat around the sides, and the workpiece is pressed on the flat parts around the lower die. When air is blown into the lower die, in order to blow out impurities on the lower surface of the workpiece, it is necessary to increase the air pressure of the air. By lifting the workpiece with a larger air pressure, impurities can be blown out from the gap between the lower surface of the workpiece and the lower die. However, a larger air pressure of the air blow can easily cause the position of the workpiece on the lower die to shift, thereby affecting the stamping quality of the workpiece. Usually, the workpiece can only be positioned twice, which is more cumbersome. Utility Model Content

[0006] The utility model aims to provide a punching device for punching sheet processing, so as to solve the problem that the workpiece is easily displaced when air is blown between the workpiece and the lower die.

[0007] The utility model is realized by the following technical solutions:

[0008] A punching device for punching sheet processing comprises a frame, wherein an upper die is arranged at the upper end of the frame and a lower die is arranged at the lower end, an air delivery cavity is opened inside the lower die, an air outlet is opened on the inner wall of the die cavity of the lower die, the air outlet is communicated with the air delivery cavity, lifting grooves are opened at the flat part of the upper surface of the lower die at intervals along the circumference of the lower die, springs are arranged on the inner bottom walls of all the lifting grooves, a support column is arranged on the upper end of the spring, one end of the support column is located in the lifting groove and slidably cooperates with the lifting groove, and the other end extends to the top of the lifting groove, and the support column can be completely slid into the lifting groove.

[0009] Furthermore, a connecting cavity is provided on the side wall of the lower mold on one side of each lifting groove, and each lifting groove is connected to the corresponding connecting cavity. A discharge port is provided at the bottom of the inner side wall of each lifting groove, and an air supply pipe is provided between the end of each connecting cavity away from the corresponding lifting groove and the air supply cavity, and an air supply valve is provided on the air supply pipe.

[0010] Furthermore, a workbench is arranged below the lower mold, and a plurality of operating grooves are opened on the side walls of the workbench. A threaded hole penetrating the lower mold is opened on the bottom wall of each of the lifting grooves, and each of the threaded holes is connected to the corresponding operating groove below. A screw rod is threadedly connected in each of the threaded holes, and the upper end of the screw rod is used to extend into the corresponding lifting groove and abut against the lower end surface of the support column, and the lower end extends into the corresponding operating groove and is provided with a rotating disk.

[0011] Furthermore, a cushion layer is provided on the upper end of each support column.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0013] In the utility model, when the stamping device is used, the workpiece to be processed is first placed on the lower die, and the workpiece is propped up by a plurality of support columns so that in the initial state, a gap is left between the workpiece and the upper surface of the lower die, and then high-pressure air is transported to the air delivery cavity inside the lower die through the air pipe, and the high-pressure air inside the air delivery cavity is discharged into the die cavity of the lower die through the air outlet, thereby purging the space between the workpiece and the lower die, so that impurities under the workpiece can be blown out through the gaps around it by air with a relatively low air pressure, thereby reducing the deviation of the workpiece due to excessive air pressure, reducing the secondary positioning operation of the workpiece, and at the same time ensuring the stamping quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model.

[0015] In the attached picture:

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

[0017] Figure 2 For this utility model Figure 1 Enlarged view of part A.

[0018] Marks and corresponding parts names in the attached drawings:

[0019] 1. Frame; 2. Upper die; 3. Lower die; 4. Air delivery cavity; 5. Air outlet; 6. Lifting slot; 7. Spring; 8. Support column; 9. Connecting cavity; 10. Discharge port; 11. Air delivery pipe; 12. Air delivery valve; 13. Workbench; 14. Operating slot; 15. Screw rod; 16. Rotating disk; 17. Cushion layer; 18. Threaded hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the embodiments and drawings. The schematic implementation mode and description of the utility model are only used to explain the utility model and are not intended to limit the utility model. It should be noted that the utility model is already in the actual development and use stage.

[0021] Example 1

[0022] A punching device for punching sheets, referring to Figure 1 , Figure 2 , including a frame 1, an upper mold 2 is arranged at the upper end of the frame 1, and a lower mold 3 is arranged at the lower end. An air delivery cavity 4 is opened inside the lower mold 3, and an air outlet 5 is opened on the inner wall of the mold cavity of the lower mold 3. The air outlet 5 is connected with the air delivery cavity 4. Lifting grooves 6 are opened at intervals along the circumference of the lower mold 3 at the flat part of the upper surface of the lower mold 3. Springs 7 are arranged on the inner bottom walls of all lifting grooves 6. A support column 8 is arranged on the upper end of the spring 7. One end of the support column 8 is located in the lifting groove 6 and slidably cooperates with the lifting groove 6, and the other end extends to the top of the lifting groove 6, and the support column 8 can be completely slid into the lifting groove 6.

[0023] In the present scheme, when using the stamping device, the workpiece to be processed is first placed on the lower die 3, and the workpiece is supported by a plurality of support columns 8, so that in the initial state, there is a gap between the workpiece and the upper surface of the lower die 3, and then high-pressure air is delivered to the air delivery cavity 4 inside the lower die 3 through the air pipe, and the high-pressure air inside the air delivery cavity 4 is discharged into the die cavity of the lower die 3 through the air outlet 5, and then the space between the workpiece and the lower die 3 is purged, so that the impurities under the workpiece can be blown out through the gaps around by the air with a relatively small air pressure, thereby reducing the deviation of the workpiece due to excessive air pressure, reducing the secondary positioning operation of the workpiece, and at the same time ensuring the stamping quality of the workpiece; after the workpiece is purged, the upper die 2 is controlled to descend, so that the upper die 2 is pressed on the workpiece, and the workpiece is pressed to drive the plurality of support columns 8 to move downward, so that the plurality of support columns 8 are completely descended into the corresponding lifting grooves 6, and while the workpiece is stamped by the upper die 2 and the lower die 3, the influence of the support columns 8 on the shape of the workpiece can be prevented, that is, the support columns 8 are not easy to change the shape of the lower surface of the workpiece during the stamping process. It should be noted that when the workpiece is placed on the multiple support columns 8, the multiple springs 7 can keep the upper ends of the multiple support columns 8 extended above the lifting groove 6 under the action of the workpiece's own weight, that is, the multiple springs 7, the multiple support columns 8, and the multiple lifting grooves 6 are adapted to the workpiece's own weight. Otherwise, the workpiece may directly press all of the multiple support columns 8 into the corresponding lifting grooves 6 and fail to play a role in discharging high-pressure gas.

[0024] Example 2

[0025] Based on Example 1, in this example, reference Figure 1 , Figure 2 A connecting cavity 9 is provided on the side wall of the lower mold 3 on one side of each lifting groove 6, and each lifting groove 6 is connected to the corresponding connecting cavity 9. A discharge port 10 is provided at the bottom of the inner side wall of each lifting groove 6. An air supply pipe 11 is provided between the end of each connecting cavity 9 away from the corresponding lifting groove 6 and the air supply cavity 4, and an air supply valve 12 is provided on the air supply pipe 11. In the long-term process of blowing air to clean impurities from the workpiece, fine impurity particles are easily mixed into the lifting groove 6, and the impurity particles are easily accumulated inside the lifting groove 6, which may affect the downward movement of the support column 8 later. In this case, the air supply valve 12 can be opened to transport high-pressure air into the lifting groove 6 through the air pipe, the air supply cavity 4, and the air supply pipe 11, so as to facilitate the discharge of fine impurities in the lifting groove 6 through the discharge port 10, thereby reducing the accumulation of fine impurities and thus affecting the downward movement of the support column 8.

[0026] Example 3

[0027] Based on Example 1, in this example, reference Figure 1 , Figure 2A workbench 13 is arranged below the lower die 3, and a plurality of operation slots 14 are provided on the side wall of the workbench 13. A threaded hole 18 penetrating the lower die 3 is provided on the inner bottom wall of each lifting slot 6, and each threaded hole 18 is connected with the corresponding operation slot 14 below. A screw rod 15 is threadedly connected in each threaded hole 18, and the upper end of the screw rod 15 is used to extend into the corresponding lifting slot 6 to abut against the lower end surface of the support column 8, and the lower end extends into the corresponding operation slot 14 and is provided with a rotating disk 16. After the stamping workpiece is completed, air can be blown into the die cavity through the air outlet 5, but sometimes the workpiece is partially stuck in the die cavity of the lower die 3, and it is difficult to demold the product even if air is blown. In this case, the rotating disk 16 can be manually rotated to move the screw rod 15 upward, and the support column 8 is lifted up through the upper end of the screw rod 15, and then the workpiece is lifted up through the support column 8 to realize the demolding of the workpiece.

[0028] Example 4

[0029] Based on Example 3, in this example, refer to Figure 1 , Figure 2 A cushion layer 17 is provided at the upper end of each support column 8. The cushion layer 17 can be made of soft materials such as rubber material and cloth. When the rotating disk 16 is rotated to lift the support column 8, the support column 8 applies force to the lower surface of the workpiece through the cushion layer 17, which can prevent the support column 8 from leaving scratches on the surface of the workpiece to a certain extent and thus affect the appearance of the product.

[0030] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A punching device for punching sheet processing, comprising a frame (1), wherein an upper die (2) is arranged at the upper end of the frame (1), and a lower die (3) is arranged at the lower end, wherein an air delivery cavity (4) is provided inside the lower die (3), and an air outlet (5) is provided on the inner wall of the cavity of the lower die (3), wherein the air outlet (5) is communicated with the air delivery cavity (4), and wherein: The flat part of the upper surface of the lower mold (3) is provided with lifting grooves (6) at intervals along the circumference of the lower mold (3), the inner bottom walls of all the lifting grooves (6) are provided with springs (7), and the upper ends of the springs (7) are provided with support columns (8), one end of the support column (8) is located in the lifting groove (6) and is slidably matched with the lifting groove (6), and the other end extends to the top of the lifting groove (6), and the support column (8) can be completely slid into the lifting groove (6).

2. A punching device for punching sheet processing according to claim 1, characterized in that: A connecting cavity (9) is provided on the side wall of the lower mold (3) on one side of each lifting groove (6); each lifting groove (6) is connected to the corresponding connecting cavity (9); a discharge port (10) is provided at the bottom of the inner side wall of each lifting groove (6); an air supply pipe (11) is provided between one end of each connecting cavity (9) away from the corresponding lifting groove (6) and connected to the air supply cavity (4); and an air supply valve (12) is provided on the air supply pipe (11).

3. A punching device for punching sheet processing according to claim 1, characterized in that: A workbench (13) is arranged below the lower mold (3), and a plurality of operating grooves (14) are provided on the side wall of the workbench (13). A threaded hole (18) penetrating the lower mold (3) is provided on the inner bottom wall of each of the lifting grooves (6), and each of the threaded holes (18) is connected to the corresponding operating groove (14) below. A screw rod (15) is threadedly connected in each of the threaded holes (18), and the upper end of the screw rod (15) is used to extend into the corresponding lifting groove (6) to abut against the lower end surface of the support column (8), and the lower end extends into the corresponding operating groove (14) and is provided with a rotating disk (16).

4. A punching device for punching sheet processing according to claim 3, characterized in that: A cushion layer (17) is provided at the upper end of each support column (8).

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