A cold heading single-cut edge trimming die

Abstract

This utility model discloses a cold heading single-cutting edge-cutting die in the field of cold heading edge-cutting die technology, including an upper die shell, a main die sleeve, and a main die pad. The upper die shell, main die sleeve, and main die pad are arranged sequentially. A blank is placed between the upper die shell and the main die sleeve. A cutting die is arranged inside the upper die shell. A lower punch push tube is fixedly connected inside the main die sleeve. A lower die core is arranged inside the lower punch push tube. One end of the blank is in contact with the cutting die, and the other end of the blank is inserted into the lower die core. This utility model achieves automatic positioning and buffering of the blank through the elastic cooperation of the lower punch and the spring. During the edge-cutting process, the lower punch always maintains contact with the blank, ensuring accurate positioning. At the same time, the spring provides stable counter pressure for the lower punch, forming dynamic balance, reducing product burrs, improving product quality, ensuring the dimensional stability of the tail chamfering, and avoiding the deformation problems in traditional processes.

Description

Technical Field

[0001] This utility model relates to the field of cold heading edge trimming mold technology, and in particular to a cold heading single-cut edge trimming mold. Background Technology

[0002] In existing cold heading single-edge cutting dies, traditional die structures typically employ a single cutting edge design, completing the cutting and forming of the product edge in a single stamping operation. However, when processing parts with small chamfer features, this design suffers from stress concentration and springback effects due to the flow of the metal material, causing the small chamfer dimensions to expand and deform after forming. This makes it difficult to precisely control the contour dimensions, resulting in a significant deviation between the geometric accuracy of the final product and the drawing requirements.

[0003] However, existing technologies have some problems: existing mold processes tend to generate large burrs during the cutting process, which not only require subsequent manual grinding to remove them, increasing the cost of surface treatment processes, but also cause a decrease in product qualification rate due to burr residue. At the same time, the waste material after cutting with traditional molds often sticks to the finished product, requiring manual intervention to separate them, which further increases production costs and efficiency losses. Therefore, we propose a cold heading single-cut edge trimming mold. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cold heading single-cutting edge-trimming die, which adopts a split lower die structure and an elastic ejection structure. During the edge-trimming process, it controls the material flow and reduces shear stress concentration, thereby effectively suppressing small chamfer deformation and burr generation. At the same time, it utilizes the linkage between the lower punch and the ejector pin to achieve automatic separation of waste material, reducing manual intervention and improving production efficiency and product dimensional accuracy.

[0005] The purpose of this utility model is achieved as follows: A cold heading single-cutting edge-trimming die includes an upper die shell, a main die sleeve, and a main die pad. The upper die shell, the main die sleeve, and the main die pad are arranged sequentially. A blank is disposed between the upper die shell and the main die sleeve. A cutting die is disposed inside the upper die shell. A lower punch tube is fixedly connected inside the main die sleeve. A lower die core is disposed inside the lower punch tube. One end of the blank is in contact with the cutting die, and the other end of the blank is inserted into the lower die core. The main die sleeve is in contact with the main die pad.

[0006] Optionally, the main mold sleeve is provided with a lower punch sleeve, which is inserted into the lower mold core and contacts the lower punch ejector tube.

[0007] Optionally, a lower punch pad is provided inside the main mold sleeve, one end of the lower punch pad is connected to the lower punch sleeve screw, and the other end of the lower punch pad is fixedly connected to the main mold pad.

[0008] Optionally, the main mold sleeve is provided with a lower punch pin inside, the lower punch pin passes through the lower punch sleeve and the lower punch pad, one end of the lower punch pin is connected to the lower push tube, and the other end of the lower punch pin is inserted into the main mold pad.

[0009] Optionally, a lower mold front support is fixedly connected to the main mold pad, and an ejector rod is provided inside the lower mold front support, the ejector rod being in contact with the lower ejector pin.

[0010] Optionally, a lower punch is provided inside the lower punch pad, the lower punch being slidably connected to the lower die core and the lower punch pad respectively, one end of the lower punch contacting the blank, and a spring is provided inside the lower punch pad, one end of the spring contacting the lower punch and the other end of the spring contacting the main die pad.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. Automatic positioning and buffering of the blank are achieved through the elastic cooperation of the lower punch and the spring. During the cutting process, the lower punch always keeps in contact with the blank to ensure accurate positioning. At the same time, the spring provides stable counter pressure for the lower punch, forming dynamic balance, reducing product burrs, improving product quality, ensuring the dimensional stability of the tail chamfering, and avoiding deformation problems in traditional processes.

[0013] 2. A mechanical automatic separation mechanism is adopted. Through the coordinated operation of the lower punch pin, lower punch push tube and lower punch bar, the cutting waste and product blank are automatically separated, reducing the reliance on manual sorting and separation process in the production process, reducing labor costs, and improving the continuity and stability of the production process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0016] Figure 2 This is a cross-sectional schematic diagram of the overall structure provided by this utility model.

[0017] Figure 3 yes Figure 2 Enlarged view of part A.

[0018] In the diagram: 1. Upper mold shell; 2. Cutting mold; 3. Main mold sleeve; 4. Lower mold core; 5. Lower punch push tube; 6. Lower punch sleeve; 7. Lower punch pad; 8. Lower punch ejector pin; 9. Main mold pad; 10. Lower punch bar; 11. Spring; 12. Front support; 13. Ejector rod; 14. Blank. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 3 The cold heading single-cutting edge-trimming die shown includes an upper die shell 1, a main die sleeve 3, and a main die pad 9. The upper die shell 1, the main die sleeve 3, and the main die pad 9 are arranged sequentially. A blank 14 is arranged between the upper die shell 1 and the main die sleeve 3. A cutting die 2 is arranged inside the upper die shell 1. A lower punch tube 5 is fixedly connected inside the main die sleeve 3. A lower die core 4 is arranged inside the lower punch tube 5. One end of the blank 14 is in contact with the cutting die 2, and the other end of the blank 14 is inserted into the lower die core 4. The main die sleeve 3 is in contact with the main die pad 9.

[0021] Furthermore, by adopting a compact layout of upper mold shell 1, main mold sleeve 3 and main mold pad 9, and in conjunction with the built-in cutting mold 2 and lower mold core 4, it is ensured that the blank 14 is subjected to uniform force during the shearing process, effectively suppressing material deformation and making the small chamfer size stable and in line with the drawing requirements.

[0022] The cooperation between the lower punch tube 5 and the lower die core 4 can enhance the rigidity of the die, reduce burr generation, reduce subsequent repair costs, and facilitate maintenance and replacement of worn parts, thus extending the service life of the die.

[0023] In addition, this structure achieves automatic separation of waste materials through precise guidance and a stable ejection mechanism, reducing manual intervention and improving production continuity. It is suitable for mass production of high-precision cold-forged parts, ensuring product consistency and yield while reducing costs.

[0024] Specifically, the main mold sleeve 3 is provided with a lower punch sleeve 6, which is inserted into the lower mold core 4 and contacts the lower punch push tube 5.

[0025] Furthermore, by setting a lower punch sleeve 6 inside the main mold sleeve 3 and engaging it with the lower mold core 4 through a plug-in connection, while maintaining close contact with the lower punch push tube 5, the overall rigidity of the mold is enhanced, ensuring uniform force distribution during the shearing process and effectively suppressing material deformation and burr generation.

[0026] The insertion and engagement of the lower punch sleeve 6 and the lower die core 4 can provide a stable guiding effect and improve the accuracy of the cutting edge position. Meanwhile, the contact surface with the lower punch push tube 5 optimizes the force transmission path, reduces energy loss, and makes the punching action smoother and more efficient.

[0027] Specifically, a lower punch 7 is provided inside the main mold sleeve 3. One end of the lower punch 7 is connected to the lower punch sleeve 6 by a screw, and the other end of the lower punch 7 is fixedly connected to the main mold pad 9.

[0028] Furthermore, by setting a lower punch 7 inside the main mold sleeve 3, the overall rigidity of the mold assembly is further improved, the assembly flexibility is enhanced, and it is convenient to quickly disassemble and replace during maintenance; the screw connection can accurately position the lower punch sleeve 6 and the lower mold core 4, ensuring the stability of the shearing process; at the same time, the fixed connection between the lower punch 7 and the main mold pad 9 forms a stable force transmission path, effectively absorbing the stamping reaction force, reducing mold vibration, thereby improving product dimensional accuracy and extending the mold service life.

[0029] Specifically, the main mold sleeve 3 is provided with a lower punch pin 8 inside, the lower punch pin 8 passes through the lower punch sleeve 6 and the lower punch pad 7, one end of the lower punch pin 8 is connected to the lower push tube, and the other end of the lower punch pin 8 is inserted into the main mold pad 9. The lower mold front support 12 is fixedly connected to the main mold pad 9, and the lower mold front support 12 is provided with a punch rod 13 inside, which contacts the lower punch pin 8.

[0030] Furthermore, by setting a linkage ejection mechanism in the lower mold structure, more efficient waste separation and product demolding functions can be achieved. The lower punch ejector pin 8 passes through the lower punch sleeve 6 and the lower punch pad 7 and has a guiding function to ensure the linear accuracy of the ejection action.

[0031] The bidirectional connection between the lower ejector pin 8 and the lower push tube and the main mold pad 9 enables the lower ejector pin 8 to accurately transmit power during the stamping process. In conjunction with the lower ejector rod 13 in the lower mold front support 12, the ejection action is automatically triggered during the mold return stroke. Through mechanical linkage, the waste material and the product are reliably separated, avoiding manual intervention in traditional processes and significantly improving production efficiency. The precise timing eliminates the risk of product jamming. At the same time, the uniform distribution of ejection force can effectively protect the surface quality of the product.

[0032] Specifically, a lower punch 10 is provided inside the lower punch pad 7. The lower punch 10 is slidably connected to the lower die core 4 and the lower punch pad 7 respectively. One end of the lower punch 10 is in contact with the blank 14. A spring 11 is provided inside the lower punch pad 7. One end of the spring 11 is in contact with the lower punch 10, and the other end of the spring 11 is in contact with the main die pad 9.

[0033] Furthermore, this utility model achieves automatic positioning and stable discharge of the blank 14 through the coordinated cooperation of the lower punch 10 and the spring 11. During the edge cutting process, the lower punch 10 maintains continuous contact with the blank 14 under the counter pressure of the spring 11, ensuring accurate positioning.

[0034] When the lower punch rod 13 drives the lower punch pin 8 to push the lower punch tube 5, the blank 14 is pushed out synchronously. At the same time, the energy stored in the spring 11 is released, causing the lower punch rod 10 to rebound quickly, forming a double pushing mechanism. This not only allows the blank 14 to smoothly enter the cutting die to complete the shearing, but also enables the waste material to be automatically discharged from the upper die shell 1 discharge port. The whole process does not require manual intervention.

[0035] It ensures the accuracy of the cutting edge position and enables efficient continuous production. At the same time, the buffering effect of spring 11 effectively reduces equipment impact, improves mold life and product qualification rate.

[0036] Cutting process: The cutting die 2 is installed in the upper die shell 1 and moves forward by the machine slider, impacting the blank 14. The blank 14 is stabilized by the lower punch 10 and spring 11 and enters the lower die core 4 to fix the blank 14 and realize the cutting process.

[0037] Material discharge process: The lower punch rod 13 presses against the lower punch pin 8 through the machine, and the lower punch pin 8 presses against the lower punch push tube 5 and moves forward to push out the incoming billet 14;

[0038] At the same time, the lower punch 10 is also ejected outward from the blank 14 by the counter pressure of the spring 11, enters the cutting die 2, and falls into the discharge port of the upper die shell 1, realizing the material discharge process.

[0039] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A cold heading single-edge cutting die, comprising an upper die shell, a main die sleeve, and a main die pad, characterized in that: The upper mold shell, main mold sleeve, and main mold pad are arranged in sequence. A blank is placed between the upper mold shell and the main mold sleeve. A cutting die is placed inside the upper mold shell. A lower punch tube is fixedly connected inside the main mold sleeve. A lower die core is placed inside the lower punch tube. One end of the blank is in contact with the cutting die, and the other end of the blank is inserted into the lower die core. The main mold sleeve is in contact with the main mold pad.

2. The cold heading single-cutting edge-trimming die according to claim 1, characterized in that: The main mold sleeve is provided with a lower punch sleeve, which is inserted into the lower mold core and contacts the lower punch push tube.

3. The cold heading single-cutting edge-trimming die according to claim 1, characterized in that: The main mold sleeve is provided with a lower punch pad. One end of the lower punch pad is connected to the lower punch sleeve screw, and the other end of the lower punch pad is fixedly connected to the main mold pad.

4. A cold heading single-edge cutting die according to claim 1, characterized in that: The main mold sleeve is provided with a lower punch pin inside. The lower punch pin passes through the lower punch sleeve and the lower punch pad. One end of the lower punch pin is connected to the lower push tube, and the other end of the lower punch pin is inserted into the main mold pad.

5. A cold heading single-edge cutting die according to claim 1, characterized in that: A lower mold front support is fixedly connected to the main mold pad, and an ejector rod is provided inside the lower mold front support, which contacts the lower ejector pin.

6. A cold heading single-edge cutting die according to claim 3, characterized in that: The lower punch pad has a lower punch bar inside, which is slidably connected to the lower die core and the lower punch pad respectively. One end of the lower punch bar is in contact with the blank. The lower punch pad has a spring inside, one end of the spring is in contact with the lower punch bar, and the other end of the spring is in contact with the main die pad.

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