A device for punching a hole in a concave cover piece of an automobile heat shield

Abstract

The utility model discloses a kind of stamping through-hole devices on inner concave cover piece of automobile heat shield, it is related to stamping equipment technical field, including punch bench, the top of punch bench is provided with inner concave cover piece main body, the top of punch bench is opened with the stamping groove for fixing the side of inner concave cover piece main body, the top of punch bench is provided with the positioning assembly for fixing the top of inner concave cover piece main body, the utility model is accurately matched with workpiece diameter by stamping groove, cooperate the transverse constraint of first limit block and second limit block in top, form the double positioning boundary of side and transverse, effectively limit the radial movement and position deviation of inner concave cover piece main body, driving motor drives double-end screw rod linkage's first limit plate and second limit plate, realize top down pressure fixed by the double-side adhesion of cambered surface pressing plate, combined with bottom spring elastic support structure, construct up side fixed and top clamping and bottom buffering three-dimensional stable clamping system, improve processing positioning precision.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a device for stamping through holes on the concave cover plate of an automotive heat shield. Background Technology

[0002] In the automotive industry, heat shields are key components used to block heat transfer from high-temperature parts such as engines. Their structural design and manufacturing process directly affect the safety, reliability, and NVH performance of automobiles. As an important part of the heat shield, the concave cover often needs to have through holes punched in specific areas. These through holes not only serve the functions of heat dissipation and weight reduction, but may also involve multiple requirements such as wiring harness perforation and airflow guidance.

[0003] In the traditional process of punching concave heat shield panels, a single stamping die is generally used to process flat sheet metal. However, the three-dimensional curved surface structure of the concave heat shield panel presents many technical bottlenecks to the traditional stamping method. On the one hand, it is difficult to position the sheet metal with a concave curved surface, and conventional fixtures are difficult to achieve precise clamping, resulting in a high deviation rate of punching position. Especially when multiple holes are processed in a coordinated manner, the hole spacing error often exceeds the design tolerance requirements. On the other hand, during the curved surface stamping process, the sheet metal is subjected to uneven stress in different areas, which can easily cause quality problems such as burrs on the edge of the through hole and edge deformation.

[0004] Therefore, it is necessary to invent a device for punching through holes on the concave cover of an automotive heat shield to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a device for punching through holes on the concave cover plate of an automotive heat shield, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for stamping through holes on a concave cover sheet of an automotive heat shield, comprising a punch press table, a concave cover sheet body being disposed on the top of the punch press table, a stamping groove for fixing the side of the concave cover sheet body being provided on the top of the punch press table, a first limiting block and a second limiting block for auxiliary positioning of the concave cover sheet body being respectively disposed on both sides of the top of the punch press table, a positioning component for fixing the top of the concave cover sheet body being disposed on the top of the punch press table, the positioning component comprising a first limiting plate slidably connected to the top of the punch press table, a first pressure plate with an arc-shaped side being fixedly connected to one side of the first limiting plate, the positioning component further comprising a second limiting plate slidably connected to the top of the punch press table, a second pressure plate with an arc-shaped side being fixedly connected to both sides of one side of the second limiting plate.

[0007] Preferably, the diameter of the stamping groove is the same as the diameter of the concave cover body.

[0008] Preferably, the heights of both the first pressure plate and the second pressure plate are greater than the height of the concave cover body.

[0009] Preferably, the punch press table has a limiting hole at the bottom of the punching groove, and a first support plate is fixedly installed on the top of the limiting hole. Vertical rods are symmetrically and movably passed through the first support plate. The top ends of the two vertical rods are fixedly connected to a top plate that is movably sleeved with the limiting hole. Compression springs are sleeved on the outer peripheral surfaces of the two vertical rods, with their two ends respectively abutting against the top plate and the first support plate.

[0010] Preferably, a first fixing block is fixedly installed on one side of the punch press table, a drive motor is fixedly installed on one side of the first fixing block, a double-ended lead screw is fixedly connected to the output end of the drive motor, a side plate is threadedly connected to one end of the first limiting plate, a pressing plate is threadedly connected to the other end of the double-ended lead screw and fixedly connected to one side of the second limiting plate, and a support block is rotatably connected to the middle of the double-ended lead screw and fixedly connected to the side of the punch press table.

[0011] Preferably, the other end of the extrusion plate is movably connected through a limiting rod, the limiting rod is movably connected through a side plate fixedly connected to the other end of the first limiting plate, and the limiting rod is fixedly connected through a second fixing block fixedly connected to the side of the punch press table.

[0012] Preferably, a right-angle plate is fixedly connected to the side of the punch press table. A rectangular hole is opened on one side of the right-angle plate. A hydraulic telescopic cylinder is fixedly installed below the top of the right-angle plate. A second support plate with its end slidably connected to the telescopic end of the hydraulic telescopic cylinder is fixedly connected to the telescopic end of the cylinder. A punching head is fixedly installed below one end of the second support plate. Punching columns are fixedly installed at equal intervals at the bottom of the punching head.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By precisely matching the stamping groove with the workpiece diameter, and with the lateral constraints of the first and second top limiting blocks, a dual positioning boundary is formed on the side and laterally. This effectively limits the radial movement and positional deviation of the concave cover body. The drive motor drives the first and second limiting plates linked by the double-headed lead screw. The top is pressed down and fixed by the double-sided contact of the arc-shaped pressure plate. Combined with the bottom spring elastic support structure, a three-dimensional stable clamping system with side fixing, top clamping, and bottom buffering is constructed to ensure that the workpiece has no risk of displacement during the stamping process and significantly improves the processing positioning accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the stamping groove, the limiting hole, and the top plate of this utility model.

[0016] Figure 2This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 3 This is a structural schematic diagram of the side plate, the limiting rod, and the first limiting plate of this utility model.

[0018] Figure 4 This is a cross-sectional view of the overall structure of this utility model.

[0019] In the diagram: 1. Punch press table; 101. Support block; 102. Limiting hole; 2. Punching groove; 3. First limiting block; 301. Second limiting block; 4. Top plate; 5. Vertical rod; 6. First support plate; 7. Compression spring; 8. First fixing block; 9. Drive motor; 10. Double-ended lead screw; 11. Side plate; 12. First limiting plate; 13. First pressure plate; 14. Extrusion plate; 15. Second limiting plate; 16. Second pressure plate; 17. Limiting rod; 18. Second fixing block; 19. Concave cover body; 20. Right angle plate; 21. Rectangular hole; 22. Hydraulic telescopic cylinder; 23. Second support plate; 24. Punching head; 25. Punching column. Detailed Implementation

[0020] 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.

[0021] This utility model provides, for example Figures 1-4 The device for punching through holes on a concave cover sheet of an automotive heat shield, as shown, includes a punch press 1. A concave cover sheet body 19 is provided on the top of the punch press 1. A punching groove 2 for fixing the side of the concave cover sheet body 19 is provided on the top of the punch press 1. A first limiting block 3 and a second limiting block 301 for auxiliary positioning of the concave cover sheet body 19 are respectively provided on the two sides of the top of the punch press 1. A positioning assembly for fixing the top of the concave cover sheet body 19 is provided on the top of the punch press 1. The positioning assembly includes a first limiting plate 12 slidably connected to the top of the punch press 1. A first pressure plate 13 with an arc-shaped side is fixedly connected to one side of the first limiting plate 12. The positioning assembly also includes a second limiting plate 15 slidably connected to the top of the punch press 1. A second pressure plate 16 with an arc-shaped side is fixedly connected to both sides of one side of the second limiting plate 15. The diameter of the punching groove 2 is the same as the diameter of the concave cover sheet body 19. The height of the first pressure plate 13 and the second pressure plate 16 is greater than the height of the concave cover sheet body 19.

[0022] The diameter of the stamping groove 2 on the top of the punch press table 1 is the same as that of the concave cover body 19. It can be precisely fixed to the side by the side wall of the groove, limiting the radial movement of the top. The first limiting block 3 and the second limiting block 301 on both sides of the top assist in positioning. By abutting against the side of the concave cover body 19, a lateral limiting boundary is formed to ensure the positional accuracy during placement. The first limiting plate 12 drives the arc-shaped first pressure plate 13 to fit against one side of the top, and prevents that side from tilting up by pressing down. The arc-shaped second pressure plates 16 on both sides of the second limiting plate 15 fit against the other side, forming a double-sided constraint. The height of the first pressure plate 13 and the second pressure plate 16 is greater than that of the concave cover body 19, which can ensure that the pressure plate can complete the extrusion of the concave cover body 19 during the lateral movement. This allows the first limiting plate 12 and the second limiting plate 15 to stay on the top sides of the concave cover body 19, avoiding the risk of displacement due to insufficient fixing range, and ultimately ensuring the stability and working accuracy of the concave cover body 19 during the stamping process.

[0023] A limiting hole 102 is opened at the bottom of the punching groove 2. A first support plate 6 is fixedly installed at the top of the limiting hole 102. Vertical rods 5 are symmetrically and movably inserted through the first support plate 6. The top ends of the two vertical rods 5 are fixedly connected to a top plate 4 that is movably sleeved with the limiting hole 102. Compression springs 7 are sleeved on the outer periphery of the two vertical rods 5, with their two ends respectively abutting against the top plate 4 and the first support plate 6. A first fixing block 8 is fixedly installed on one side of the punching table 1. A drive motor 9 is fixedly installed on one side of the first fixing block 8. A double-ended lead screw 10 is fixedly connected to the output end of the drive motor 9. A side plate 11 is threadedly connected to one end of the first limiting plate 12. A pressing plate 14 is threadedly connected to one side of the second limiting plate 15 at the other end of the double-ended lead screw 10. A support block 101 is rotatably connected to the middle of the double-ended lead screw 10 and fixedly connected to the side of the punching table 1.

[0024] When the concave cover body 19 is placed in the stamping groove 2, the top plate 4 is compressed by gravity to compress the spring 7, forming an elastic buffer to avoid damage to the parts caused by rigid contact. After pressing, the compression spring 7 rebounds and pushes the top plate 4 to reset, making it easy to remove the finished product. The drive motor 9 is started, and the double-headed screw 10 rotates to drive the two side plates 11 to slide synchronously in opposite directions. This causes the first limiting plate 12 to drive the first pressure plate 13 and the second limiting plate 15 to drive the second pressure plate 16 to slide synchronously in opposite directions. At the same time, the other end of the extrusion plate 14 moves through the limiting rod 17, which also passes through the side plate 11 and is fixed to the second fixing block 18 to form a rigid guide structure. By conforming the arc surface to the top of the concave cover body 19, the concave cover body 19 is pressed downward during the lateral movement, thus fixing the concave cover body 19. The displacement of the pressure plate is precisely controlled by the screw, and the design of the pressure plate with the top higher than the workpiece ensures the stable fixing and stamping accuracy of the concave cover body.

[0025] A right-angle plate 20 is fixedly connected to the side of the punch press table 1. A rectangular hole 21 is opened on one side of the right-angle plate 20. A hydraulic telescopic cylinder 22 is fixedly installed below the top of the right-angle plate 20. A second support plate 23 with its end slidably connected to the telescopic end of the hydraulic telescopic cylinder 22 is fixedly connected to the telescopic end of the hydraulic telescopic cylinder 22. A punching head 24 is fixedly installed below one end of the second support plate 23. Punching columns 25 are fixedly installed at equal intervals at the bottom of the punching head 24. After the hydraulic system is started, the telescopic end of the hydraulic telescopic cylinder 22 unfolds and drives the second support plate 23 to move downward along the direction of the rectangular hole 21. This causes the bottom punching head 24 and the equidistantly distributed punching columns 25 to act precisely on the surface of the concave cover body 19. With the stable clamping of the positioning component, the perforation operation of the cover can be completed efficiently, improving the processing accuracy.

[0026] The working principle of this utility model is as follows: First, the concave cover body 19 is placed in the stamping groove 2 at the top of the punch press table 1. The first limiting block 3 and the second limiting block 301 on both sides of the top abut against the side of the workpiece, forming a lateral positioning boundary. Then, the drive motor 9 is started, which drives the double-headed lead screw 10 to rotate. Through the threaded transmission, the side plate 11 and the extrusion plate 14 move synchronously towards each other, thereby pushing the first limiting plate 12 and the second limiting plate 15 to slide. During the process, the limiting rod 17 constrains the extrusion plate 14 and the side plate 11 to move axially to avoid displacement, until the arc surface of the first pressure plate 13 and the second pressure plate 16 is in contact with the top of the workpiece. Because the height of the pressure plate is greater than that of the workpiece, the top double-sided clamping and fixing is achieved after pressing down, so that the concave cover body 19 is located in the stamping groove 2. Since the diameter of the stamping groove 2 is the same as that of the workpiece. The radial movement of the concave cover body 19 can be restricted by the side of the groove wall. At this time, the bottom of the workpiece presses down on the top plate 4, and the compression spring 7 generates elastic buffer to ensure the stability of the bottom support. The hydraulic telescopic cylinder 22 is activated, and its telescopic end drives the second support plate 23 to slide down along the rectangular hole 21 of the right angle plate 20, which drives the stamping head 24 and the stamping columns 25 distributed at equal intervals at the bottom to act vertically on the surface of the concave cover body 19 to complete the stamping operation. After the stamping is completed, the hydraulic telescopic cylinder 22 is retracted, the stamping head 24 is reset, and the drive motor 9 is reversed. The double-headed screw 10 drives the first limit plate 12 and the second limit plate 15 to move in opposite directions to release the workpiece. At this time, the compression spring 7 rebounds and pushes the top plate 4 to move up, pushing the workpiece out of the stamping groove 2, so that the finished product can be manually removed, completing the entire work cycle.

[0027] It should be noted that the drive motor 9 uses an external power supply and is equipped with a controller. In this embodiment, the concave cover body 19, the stamping groove 2, the first limiting block 3 and the second limiting block 301 are only used to provide limiting. They include but are not limited to the shapes shown in the drawings. They can be set according to the actual size of the concave cover body 19. Furthermore, the diameter of the concave cover body 19 in this embodiment is not limited.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for punching through holes on a concave cover sheet of an automotive heat shield, comprising a punch press (1), wherein a concave cover sheet body (19) is provided on the top of the punch press (1), characterized in that: The top of the punch press table (1) is provided with a punching groove (2) for fixing the side of the concave cover body (19). The top two sides of the punch press table (1) are respectively provided with a first limiting block (3) and a second limiting block (301) for auxiliary positioning of the concave cover body (19). The top of the punch press table (1) is provided with a positioning component for fixing the top of the concave cover body (19). The positioning component includes a first limiting plate (12) that is slidably connected to the top of the punch press table (1). One side of the first limiting plate (12) is fixedly connected to a first pressure plate (13) with an arc side. The positioning assembly also includes a second limiting plate (15) that is slidably connected to the top of the punch press table (1), and a second pressure plate (16) with an arc-shaped side is fixedly connected to both sides of one side of the second limiting plate (15).

2. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 1, characterized in that: The diameter of the stamping groove (2) is the same as the diameter of the concave cover body (19).

3. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 1, characterized in that: The heights of the first pressure plate (13) and the second pressure plate (16) are both greater than the height of the concave cover body (19).

4. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 1, characterized in that: The punch press table (1) has a limiting hole (102) at the bottom of the punching groove (2). A first support plate (6) is fixedly installed on the top of the limiting hole (102). Vertical rods (5) are symmetrically and movably passed through the first support plate (6). The top ends of the two vertical rods (5) are fixedly connected to the top plate (4) which is movably sleeved with the limiting hole (102). Compression springs (7) are sleeved on the outer peripheral surfaces of the two vertical rods (5) for their two ends to abut against the top plate (4) and the first support plate (6) respectively.

5. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 1, characterized in that: A first fixing block (8) is fixedly installed on one side of the punch press table (1), and a drive motor (9) is fixedly installed on one side of the first fixing block (8). A double-ended lead screw (10) is fixedly connected to the output end of the drive motor (9). A side plate (11) is threadedly connected to one end of the first limiting plate (12). A pressing plate (14) is threadedly connected to one side of the second limiting plate (15). A support block (101) is rotatably connected to the middle of the double-ended lead screw (10) and fixedly connected to the side of the punch press table (1).

6. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 5, characterized in that: The other end of the extrusion plate (14) is movably connected through a limiting rod (17), the limiting rod (17) is movably connected through a side plate (11) fixedly connected to the other end of the first limiting plate (12), and the limiting rod (17) is fixedly connected through a second fixing block (18) fixedly connected to the side of the punch press table (1).

7. The device for punching through holes on the concave cover plate of an automotive heat shield according to claim 1, characterized in that: A right-angle plate (20) is fixedly connected to the side of the punch press table (1). A rectangular hole (21) is opened on one side of the right-angle plate (20). A hydraulic telescopic cylinder (22) is fixedly installed below the top of the right-angle plate (20). A second support plate (23) is fixedly connected to the telescopic end of the hydraulic telescopic cylinder (22) and its end is slidably connected to the rectangular hole (21). A punch head (24) is fixedly installed below one end of the second support plate (23). Punching columns (25) are fixedly installed at equal intervals at the bottom of the punch head (24).

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