Cylinder head punching tool

Abstract

The utility model relates to the field of machining, especially a cylinder head punching tool. It comprises a lower die plate, an upper die plate and a punch press. The arc-shaped support module is fixedly installed on the lower die plate, movable baffles are arranged on both sides of the front end of the arc-shaped support module, a chuck is arranged at the rear end, when the hollow cylinder is placed on the arc-shaped support module, the movable baffles block the front end, the chuck is pressed on the inner wall, and the head extends out of the front end. The upper die plate is installed with a connecting block, the connecting block is fixed with a cutter head, and the cutter head and the arc-shaped support module cooperate to punch the head. In addition, a limiting block is arranged in front of the arc-shaped support module, which is matched with the thickness of the cutter head, and the cutter head slides with the limiting block and the sidewall of the arc-shaped support module when punching; the lower die plate, the punch press workbench and the upper die plate are fixedly connected with the punch, respectively; the lower die plate is provided with a chuck seat, the chuck is fixed through a screw; and the cutter head is rectangular and has an arc at the front end. The tool can effectively punch the cylinder head.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a punching tool for cylindrical material heads. Background Technology

[0002] In the mechanical manufacturing process, when rolling sheet metal into cylinders, an extra section of sheet metal is usually reserved to assist in welding and prevent welding deformation. This excess section is called the sprue. After welding is completed, the sprue is the part that needs to be removed to ensure that the cylinder meets the specifications.

[0003] Punching is a common separation process for removing sprue heads. During punching, the punch descends and contacts the sheet metal. The sheet metal undergoes elastic deformation under the pressure of the punch and die, bending and lifting off the die surface due to torque. As the punch continues to press down, the material at the cutting edge reaches plasticity, undergoing plastic deformation and extending into the sheet metal until the entire sheet metal undergoes plastic deformation, with one part moving relative to another. During this process, the torque presses the sheet metal against the cutting edge surface, forming a bright cut. When the material strain and stress reach their limits, cracks form and propagate, ultimately separating the sheet metal. However, currently used punching equipment, when processing cylindrical sprue heads, suffers from difficulty in precise alignment as the cutting head descends with the pressure plate. This not only increases the difficulty of equipment debugging but also frequently leads to overcutting, resulting in product scrap or requiring secondary processing of residual sprue heads, severely reducing product yield. To effectively solve these problems, a novel cylindrical sprue head punching fixture solution is proposed. Utility Model Content

[0004] To achieve precise punching of the cylinder head, improve punching stability, and enhance the applicability and flexibility of the tooling, this utility model proposes the following technical solution:

[0005] A blanking fixture for hollow cylinders includes a lower template, an upper template, and a punching machine. The lower template has an arc-shaped support module fixedly mounted on it. Movable baffles are installed on both sides of the front end of the arc-shaped support module, and a chuck is provided at the rear end. When the lower end of the hollow cylinder is placed on the arc-shaped support module and pressed against its inner arc surface, the movable baffles block the front end of the hollow cylinder, and the chuck presses down against the inner wall of the hollow cylinder, causing the blank to extend beyond the front end of the arc-shaped support module. The upper template has a connecting block, and a cutting head is fixedly connected to the connecting block. The cutting head cooperates with the arc-shaped support module, and when the cutting head punches downwards, it cuts off the blank extending beyond the front end of the arc-shaped support module.

[0006] Preferably, a limiting block is installed in front of the arc-shaped support module. The distance between the limiting block and the support module is the thickness of the cutting head. When the cutting head presses downward, it slides and engages with the limiting block and the side wall of the arc-shaped support module, respectively.

[0007] Preferably, a chuck seat is fixedly installed on the lower template, the chuck seat is provided with a threaded hole, and the chuck is provided with a straight groove. The straight groove of the chuck and the threaded hole of the chuck seat cooperate with each other. By adding a screw head, the chuck can be fixed.

[0008] Preferably, the blade is rectangular and has a curved front end.

[0009] Preferably, the lower template is fixedly connected to the worktable of the stamping machine, and the upper template is fixedly connected to the punch of the stamping machine.

[0010] Preferably, the arc-shaped support module has screw heads on both sides of its front end, the movable baffle has through holes, the screw heads pass through the through holes of the movable baffle, and the movable baffle can be fixed by screwing on the screw heads and nuts.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The arc-shaped support module of this utility model works in conjunction with the movable baffle and clamp to stably fix the hollow cylinder, making the material head protrusion position precisely controllable. The cutter head of the upper template cooperates precisely with the arc-shaped support module to ensure that each punching is performed in the preset position, greatly improving the punching accuracy and ensuring the consistency of product quality.

[0013] 2. The sliding fit between the limiting block and the side wall of the arc-shaped support module of this utility model restricts the movement of the cutter head, ensuring a stable trajectory during stamping and preventing wobbling or deviation. This not only improves the stamping quality but also reduces wear on the cutter head caused by unstable impacts, extending its service life and thus lowering production costs.

[0014] 3. This utility model's chuck uses a straight slot to mate with the threaded hole of the chuck seat and is fixed with a screw head, allowing for easy adjustment of the chuck position according to hollow cylinders of different diameters, meeting diverse processing needs. The movable baffle is fixed with a screw head and nut, allowing for flexible position adjustment to adapt to punching cylinders of different lengths, enhancing the tooling's versatility and applicability. The arc design of the cutter head's tip better conforms to the shape of the cylinder material, reducing stress concentration during punching, and effectively punching cylinder materials of different materials and hardness, improving the tooling's adaptability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a cylindrical material head punching tool according to the present invention.

[0016] Figure 2 This is a schematic diagram of the lower and upper templates of a cylindrical material head punching fixture according to the present invention.

[0017] Figure 3This is a schematic diagram of the back of the lower template of a cylindrical material head punching tool according to the present invention.

[0018] Figure 4 This is a schematic diagram of a die template for a cylindrical material head punching tool according to the present invention.

[0019] Figure 5 This is a schematic diagram of a cylindrical material head punching tool and its material head according to the present invention.

[0020] In the diagram: 1. Lower template; 2. Upper template; 3. Press machine; 4. Arc-shaped support module; 5. Movable baffle; 6. Chuck; 7. Hollow cylinder; 8. Material head; 9. Connecting block; 10. Cutting head; 11. Limiting block; 12. Chuck seat; 13. Worktable; 14. Screw head. Detailed Implementation

[0021] A cylindrical blank cutting fixture includes a lower template 1, an upper template 2, and a stamping machine 3. The lower template 1 is fixedly connected to the worktable 13 of the stamping machine 3, and the upper template 2 is fixedly connected to the punch of the stamping machine 3. An arc-shaped support module 4 is fixedly installed on the lower template 1. Movable baffles 5 are installed on both sides of the front end of the arc-shaped support module 4, and a chuck 6 is provided at the rear end of the arc-shaped support module 4. When the lower end of the hollow cylindrical blank 7 is placed on the arc-shaped support module 4 and closely abuts the inner arc surface of the arc-shaped support module 4, the movable baffles block the front end of the hollow cylindrical blank 7, the chuck 6 presses down on the inner wall of the hollow cylindrical blank 7, and the blank 8 at the front end of the hollow cylindrical blank 7 extends out of the front end of the arc-shaped support module 4.

[0022] A connecting block 9 is installed on the upper template 2, and a cutter head 10 is fixedly connected to the connecting block 9. The cutter head 10 cooperates with the arc-shaped support module 4. When the cutter head 10 punches downward, it cuts off the material head 8 extending from the front end of the arc-shaped support module 4. A limit block 11 is installed in front of the arc-shaped support module 4. The distance between the limit block 11 and the support module is the thickness of the cutter head 10. When the cutter head 10 punches downward, it slides in cooperation with the limit block 11 and the side wall of the arc-shaped support module 4, respectively. Screw heads 14 are provided on both sides of the front end of the arc-shaped support module 4. The movable baffle 5 has through holes. The screw heads 14 pass through the through holes of the movable baffle 5. After the screw heads 14 are screwed with nuts, the movable baffle 5 can be fixed.

[0023] A chuck seat 12 is fixedly installed on the lower template 1. The chuck seat 12 has a threaded hole, and the chuck 6 has a straight groove. The straight groove of the chuck 6 cooperates with the threaded hole of the chuck seat 12. The chuck 6 can be fixed by screwing in the screw head 14. The cutter head 10 is rectangular and has a curved front end.

Claims

1. A punch die tool for a cylinder head (8) comprising a lower die plate (1), an upper die plate (2), a punch press (3), characterized in that, The lower mold plate (1) is fixedly installed with an arc-shaped supporting module (4), the arc-shaped supporting module (4) is installed with movable baffles (5) on both sides of the front end, and the arc-shaped supporting module (4) is provided with a chuck (6) at the rear end; when the hollow cylinder (7) is placed on the arc-shaped supporting module (4) and closely attached to the inner arc surface of the arc-shaped supporting module (4), the movable baffles are blocked in front of the hollow cylinder (7), the chuck (6) is pressed on the inner wall of the hollow cylinder (7), and the material head (8) at the front end of the hollow cylinder (7) extends out of the front end of the arc-shaped supporting module (4). The upper mold plate (2) is installed with a connecting block (9), the connecting block (9) is fixedly connected with a tool bit (10), the tool bit (10) cooperates with the arc-shaped supporting module (4), and when the tool bit (10) is downwardly punched, the material head (8) extending out of the front end of the arc-shaped supporting module (4) is cut off.

2. A punch tool for cutting a cylinder end (8) according to claim 1, characterized in that The arc-shaped supporting module (4) is provided with a limiting block (11) in front, the distance between the limiting block (11) and the supporting module is the thickness of the tool bit (10), and when the tool bit (10) is downwardly punched, the limiting block (11) and the side wall of the arc-shaped supporting module (4) are respectively slidably matched.

3. The punch tooling for a barrel end (8) according to claim 1, characterized in that, The lower mold plate (1) is fixedly installed with a chuck seat (12), the chuck seat (12) is provided with a threaded hole, the chuck (6) is provided with a straight slot, the straight slot of the chuck (6) and the threaded hole of the chuck seat (12) are matched with each other, a screw (14) is screwed in, and the chuck (6) can be fixed.

4. The punch tooling for a barrel end (8) of claim 1, wherein, The tool bit (10) is rectangular, and the front end is provided with an arc.

5. The punch tooling for a barrel end (8) of claim 1, wherein, The lower mold plate (1) is fixedly connected with the workbench (13) of the punching machine tool (3), and the upper mold plate (2) is fixedly connected with the punch of the punching machine tool (3).

6. A punch tool for cutting a cylinder end (8) according to claim 5, characterized in that The arc-shaped supporting module (4) is provided with a screw (14) on both sides of the front end, the movable baffle (5) is provided with a through hole, the screw (14) penetrates through the through hole of the movable baffle (5), and after the screw (14) is screwed on the nut, the movable baffle (5) can be fixed.

Images