Anti-material-returning punching die
By designing an anti-return punching die, the problem of material return during the punching process of round rods was solved, which improved the stability of the round rod position and the processing accuracy, and reduced the defect rate and production cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN HAIYI TOOL & DIE CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-17
AI Technical Summary
During the punching process of round bars, the lack of an effective anti-reverse mechanism makes the round bars prone to retraction, affecting processing quality and efficiency.
A punching die designed to prevent material ejection includes an anti-ejection mechanism and a limiting mechanism. By increasing the friction between the round rod and the anti-ejection component, the position of the round rod is stabilized, thus preventing material ejection.
It improves the dimensional accuracy and product quality of round rod punching, and reduces the defect rate and production cost.
Smart Images
Figure CN224128356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, specifically to an anti-reverse material ejection punching die. Background Technology
[0002] In the field of machining, round rods are a common raw material widely used in the manufacturing of various parts. Punching is one of the most common processes for round rods, cutting them into the required length and shape to meet the assembly needs of different products. However, preventing material stripping during the punching process has always been a key factor restricting processing quality and efficiency.
[0003] In traditional round rod punching dies, the lack of an effective anti-reverse mechanism makes the round rod prone to retraction when subjected to punching force. Specifically, when the upper die punching head applies pressure to the round rod for punching, the round rod may move backward under the push of the reaction force, resulting in inaccurate punching position and dimensional deviation. This not only affects product quality, making the punched round rod unable to meet assembly requirements, leading to an increased defect rate and production costs, but also reduces production efficiency, as operators need to frequently adjust the position of the round rod, or even redo the punching operation, thus extending the production cycle. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an anti-reverse punching die, which solves the problems mentioned in the background section.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a punching die for preventing material ejection, including a lower die base, an anti-ejection mechanism installed on the upper part of the lower die base, the anti-ejection mechanism including a first base installed on the top of the lower die base, a first groove opened inside the first base, an eccentrically rotatably connected swing arm in the first groove, a column installed on the top of the first base, and a tension spring connecting the column and the swing arm.
[0006] Furthermore, the bottom end of the swing arm has a clearance groove adapted to the round rod, and the clearance groove abuts against the surface of the round rod.
[0007] Furthermore, the first base has a pin hole and a first through hole respectively. The pin hole and the first through hole are connected to the first groove. The pin hole and the interior of the swing arm are both inserted with a pin shaft, which is eccentrically inserted inside the swing arm.
[0008] Furthermore, a punching die is also installed on the upper part of the lower die base. The punching die includes a second base installed on the top of the lower die base. The lower die holder and a positioning member are fixed inside the second base. A pressure block is installed on the top of the second base. The pressure block constrains and fixes the positioning member inside the second base.
[0009] Furthermore, the second base has a second through hole, a second groove, a third groove and a fourth groove that are connected to each other. The positioning member has a third through hole that is connected to the second through hole. The positioning member is fixed inside the second groove and the lower die holder is fixed inside the third groove.
[0010] Furthermore, a limiting mechanism is also installed on the upper part of the lower mold base. The limiting mechanism includes a third base installed on the top of the lower mold base. A fourth groove is opened inside the third base, and a support rod is installed on the side of the third base. A limiting block is installed at the end of the support rod.
[0011] Furthermore, the anti-return punching die also includes an upper die base located directly above the anti-return mechanism, and an upper die punching cutter head is installed at the bottom of the upper die base.
[0012] This utility model provides an anti-reverse punching die. Compared with the prior art, it has the following advantages:
[0013] This anti-backflow punching die, through its unique anti-backflow mechanism design, can stably and reliably increase the friction between the round rod and the anti-backflow component during the round rod punching process. This effectively prevents the round rod from backing up due to the punching reaction force, significantly improving the dimensional accuracy and product quality of the round rod punching process, and reducing the defect rate and production cost. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;
[0015] Figure 2 This is a schematic diagram showing the disassembled structure of the anti-material return mechanism in this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the first base in this utility model;
[0017] Figure 4 This is a schematic diagram of the disassembled structure of the punching die in this utility model;
[0018] Figure 5 This is a schematic diagram of the structure of the second base in this utility model;
[0019] Figure 6 This is a schematic diagram of the limiting mechanism in this utility model;
[0020] Figure 7 This is a half-sectional view of the present invention in the mold-open state;
[0021] Figure 8 This is a half-sectional view of the present invention in the mold-closed state.
[0022] In the diagram: 1. Lower die base; 2. Anti-reverse mechanism; 21. First base; 22. First groove; 23. Swing arm; 231. Clearance groove; 24. Column; 25. Tension spring; 26. Pin; 27. Pin hole; 28. First through hole; 3. Lower punching die; 31. Second base; 311. Second through hole; 312. Second groove; 313. Third groove; 314. Fourth groove; 32. Lower die cutter holder; 321. Semicircular groove; 33. Positioning component; 331. Third through hole; 34. Pressure block; 4. Limiting mechanism; 41. Third base; 42. Fifth groove; 43. Support rod; 44. Limiting block; 5. Upper die base; 6. Upper die punching cutter head; 7. Round rod. Detailed Implementation
[0023] 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.
[0024] Please see Figure 1-8 This utility model provides a technical solution: an anti-rejection punching die, mainly comprising a lower die base 1, an anti-rejection mechanism 2, a punching lower die 3, a limiting mechanism 4, an upper die base 5, and an upper die punching cutter head 6, as detailed below:
[0025] The lower die base 1 is the basic support component of the entire die. It is placed horizontally on the worktable to support and fix other components. It needs to have sufficient strength and stability to withstand the pressure during the punching process.
[0026] The anti-reverse mechanism 2 is installed on the upper part of the lower mold base 1. Specifically, the first base 21 is firmly installed on the top of the lower mold base 1 by bolts or other fasteners. The first base 21 has a first groove 22 inside, the size and shape of which are adapted to the swing arm 23. The swing arm 23 is eccentrically connected to the first groove 22 by a pin 26. The pin 26 is inserted into both the pin hole 27 of the first base 21 and the interior of the swing arm 23, realizing the eccentric installation of the swing arm 23, so that the swing arm 23 can rotate around the pin 26. A column 24 is installed on the top of the first base 21. The column 24 is fixed to the first base 21 by welding or threaded connection. A tension spring 25 is connected between the column 24 and the swing arm 23. The two ends of the tension spring 25 are connected to the column 24 and the swing arm 23 by hooks or other means, respectively, to provide restoring force for the swing arm 23. The bottom end of the swing arm 23 is provided with a relief groove 231 that is adapted to the round rod. In the anti-reverse state, the relief groove 231 can closely abut against the surface of the round rod.
[0027] The punching die 3 is also installed on the upper part of the lower die base 1, located on one side of the anti-return mechanism 2. The second base 31 is fixed to the top of the lower die base 1 by bolts. The second base 31 has a second through hole 311, a second groove 312, a third groove 313, and a fourth groove 314 that are connected inside. The positioning member 33 is fixed inside the second groove 312, and the positioning member 33 has a third through hole 331 that is connected to the second through hole 311 so that the round rod can pass through smoothly. The lower die holder 32 is fixed inside the third groove 313, and the top of the lower die holder 32 is tightly fitted with the bottom of the positioning member 33. A pressure block 34 is installed on the top of the second base 31. The pressure block 34 uses bolts and other fasteners to constrain and fix the positioning member 33 inside the second base 31 to prevent the positioning member 33 from moving during operation.
[0028] The limiting mechanism 4 is installed on the upper part of the lower die base 1, near the side of the punching lower die 3. The third base 41 is bolted to the top of the lower die base 1. The interior of the third base 41 has a fifth groove 42 that communicates with the fourth groove 314, allowing the round rod to smoothly enter the fifth groove 42 from the fourth groove 314. A support rod 43 is installed on the side of the third base 41. One end of the support rod 43 is fixed to the side of the third base 41 by welding or threaded connection, and the other end of the support rod 43 is equipped with a limiting block 44. The limiting block 44 is fixed to the end of the support rod 43 by bolts, etc., to limit the round rod and prevent it from moving excessively during insertion.
[0029] The upper die base 5 is located directly above the anti-return mechanism 2 and is connected and driven by the lifting end of the punching drive equipment. The upper die punching head 6 is installed at the bottom of the upper die base 5 by bolts and other fasteners. The upper die punching head 6 corresponds to the lower die cutter holder 32 in the lower die 3, and semi-circular grooves 321 are opened at the adjacent ends of the upper die punching head 6 and the lower die cutter holder 32. The semi-circular grooves 321 are adapted to the round rod so as to position and punch the round rod during the punching process.
[0030] Work process:
[0031] First, the round rod 7 is inserted sequentially into the first groove 22, the first through hole 28, the second through hole 311, the third through hole 331, the third groove 313, the fourth groove 314, and the fifth groove 42. As the round rod 7 is inserted into the first groove 22 and moves, the end of the round rod 7 pushes against the bottom of the swing arm 23, causing the swing arm 23 to rotate counterclockwise around the pin 26. At this time, the top of the swing arm 23 will move outwards, and the tension spring 25 will be stretched.
[0032] When the round rod 7 stops moving and the swing arm 23 is no longer pushed by the round rod 7, the tension spring 25 shortens, causing the swing arm 23 to rotate clockwise until the bottom end of the swing arm 23 abuts against the surface of the round rod 7. At this time, the pressure generated by the tension spring 25 increases the friction between the swing arm 23 and the round rod 7, thereby effectively preventing the round rod 7 from slipping out during the punching process. At the same time, the end of the round rod 7 abuts against the limiting block 44 to ensure the accurate positioning of the round rod 7.
[0033] The punching drive device moves the upper die holder 5 and the upper die punching head 6 downwards as a whole, closing the die with the anti-retraction mechanism 2. During the die closing process, the upper die punching head 6 cooperates with the lower die holder 32 to punch the round rod 7. The semi-circular grooves 321 on the upper die punching head 6 and the lower die holder 32 position the round rod 7, ensuring accurate punching position. As the upper die punching head 6 continues to press down, the round rod 7 is punched off.
[0034] After punching is completed, the punching drive moves the upper die holder 5 and the upper die punching head 6 upwards as a whole, opening the die with the anti-retraction mechanism 2. At this time, due to the action of the anti-retraction mechanism 2, the round rod 7 will not automatically exit the die due to gravity or other factors. The operator can then remove the cut round rod 7 from the die, completing one punching process.
Claims
1. A punching die for preventing material ejection, comprising a lower die base (1), characterized in that, An anti-return mechanism (2) is installed on the upper part of the lower mold base (1). The anti-return mechanism (2) includes a first base (21) installed on the top of the lower mold base (1). A first groove (22) is opened inside the first base (21). A swing arm (23) is eccentrically connected in the first groove (22). A column (24) is installed on the top of the first base (21). A tension spring (25) is connected between the column (24) and the swing arm (23).
2. The anti-backlash die of claim 1 wherein, The bottom end of the swing arm (23) is provided with a relief groove (231) that is adapted to the round rod, and the relief groove (231) abuts against the surface of the round rod.
3. The anti-backlash die of claim 1 wherein, The first base (21) has a pin hole (27) and a first through hole (28) respectively. The pin hole (27) and the first through hole (28) are connected to the first groove (22). The pin hole (27) and the swing arm (23) are both inserted with a pin shaft (26). The pin shaft (26) is eccentrically inserted into the swing arm (23).
4. The anti-backlash die of claim 1 wherein, The upper part of the lower die base (1) is also equipped with a punching lower die (3). The punching lower die (3) includes a second base (31) installed at the top of the lower die base (1). The lower die cutter holder (32) and the positioning member (33) are fixed inside the second base (31). A pressure block (34) is installed at the top of the second base (31). The pressure block (34) constrains and fixes the positioning member (33) inside the second base (31).
5. The anti-backlash die of claim 4 wherein, The second base (31) has a second through hole (311), a second groove (312), a third groove (313) and a fourth groove (314) that are connected to each other. The positioning member (33) has a third through hole (331) that is connected to the second through hole (311). The positioning member (33) is fixed inside the second groove (312). The lower die holder (32) is fixed inside the third groove (313).
6. The anti-backlash die of claim 1 wherein, The upper part of the lower mold base (1) is also equipped with a limiting mechanism (4). The limiting mechanism (4) includes a third base (41) installed at the top of the lower mold base (1). The interior of the third base (41) has a fifth groove (42) that communicates with the fourth groove (314). A support rod (43) is installed on the side of the third base (41), and a limiting block (44) is installed at the end of the support rod (43).
7. The anti-backlash die of claim 1 wherein, It also includes an upper die base (5) located directly above the anti-return mechanism (2), and the bottom end of the upper die base (5) is equipped with an upper die punching head (6).