Cold heading protection material receiving and stripping die of flanging rivet nut

Abstract

The utility model discloses a cold heading protection material receiving and stripping die of a turning rivet nut, which relates to the technical field of cold heading material stripping dies and comprises a male die, an upper punch rear ejector rod is arranged in the male die, an upper punch and an upper punch ejector rod are arranged on the right side of the upper punch rear ejector rod, a set screw is arranged above the upper punch rear ejector rod, and an ejector pin is connected with the upper punch rear ejector rod under the action of elastic restoring force of a spring. The position of the ejector pin can be slightly adjusted according to the actual position and shape of a product, the elastic characteristic of the spring enables the ejector pin to flexibly move within a certain range so as to adapt to products of different sizes and shapes to enter a die, and the upper punch pad and the upper punch are matched with the ejector pin in the moving process, so that the product quality is improved. The supporting and guiding mechanisms jointly provide stable supporting and guiding for a product, the positions of the product can be finely adjusted, it is ensured that the product can accurately enter a cavity of a male die, the problems that the product inclines, deviates or is clamped in the die entering process are solved, and therefore the situation that material receiving is not stable is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of cold heading stripping mold technology, and in particular to a cold heading protective stripping mold for riveting nuts. Background Technology

[0002] Cold heading protective stripping dies for riveted nuts play a crucial role in numerous industries, including automobile manufacturing. In automobile manufacturing, many components require nut and bolt connections, and riveted nuts are widely used. Their importance is increasingly highlighted, especially given the rising demands for sealing and waterproofing in new energy vehicles, as they are vital for the safety of critical components such as battery packs and the prevention of water-related accidents.

[0003] The normal operation of the cold heading protective die for riveting nuts involves multiple components and technologies:

[0004] 1. The male mold is the core component of the mold. Its structure and material (such as tungsten steel in some parts) affect the durability and molding accuracy of the mold, and provide basic support and cavity shape for the entire molding process.

[0005] 2. The receiving fixture includes set screws, springs, ejector pins, upper punch pads, and upper punches, which are responsible for stabilizing the product position when it enters the mold. The set screws ensure that the positions of each component are fixed, the springs provide elastic cushioning and fine-tuning functions, and the ejector pins work together with the upper punch pads and upper punches to adapt to different product sizes and shapes, ensuring accurate receiving.

[0006] 3. The stripping fixture works in conjunction with the upper punch and the upper punch rod to remove the formed blank. The coordinated movement and force transmission of the two control the stripping effect.

[0007] 4. The upper punch sleeve protects and prevents the upper punch ejector rod from rotating, thus preventing damage and abnormal rotation during the molding process and ensuring stability.

[0008] Currently, manufacturers employ various mold designs and production methods to produce riveted nuts. Some manufacturers use traditional mold structures, relying on basic forming and demolding designs; others prioritize mold material strength, using high-strength steel to manufacture some key components.

[0009] However, the above-described implementation still has the following problems. Regarding mold breakage, the original mold is prone to breakage due to factors such as the inability of the nut to detach, the upper mold ejector pin being stressed and causing breakage, and unstable material receiving. This not only leads to frequent downtime during product production, increasing equipment maintenance costs, but also reduces production efficiency and wastes a significant amount of labor. In terms of product entry and exit stability, the original mold lacks effective material receiving and ejection control devices, making it prone to problems such as skewed material and positional deviation when the product enters the mold. During exit, the blank may adhere to the mold, leading to multiple blanks stacking and triggering a chain reaction of mold breakage. These problems seriously affect the continuity and stability of production, increase production costs, and reduce product quality. This application proposes a solution to this problem: designing an optimized structure for cold heading protection and ejection mold for riveting nuts. By adding a material receiving device, improving the forming tooling, and optimizing the ejection method, it improves problems such as mold breakage, unstable product entry and exit, increases production efficiency, and reduces production costs. Utility Model Content

[0010] To address the shortcomings of existing technologies, this utility model provides a cold heading protective ejection mold for riveting nuts, which solves the problem of mold bursting caused by reasons such as the nut being unable to be ejected, the upper mold ejector pin being stressed and bursting, and unstable material connection.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A cold heading protective ejection die for a riveting nut includes a male die, an upper punch and a rear ejector rod inside the male die, an upper punch and an upper punch ejector rod on the right side of the upper punch and rear ejector rod, a set screw above the upper punch and rear ejector rod, a spring fixedly connected to the right surface of the set screw, an ejector pin fixedly connected to the right surface of the spring, an upper punch pad on the right side of the ejector pin, and an upper punch sleeve pad below the upper punch and rear ejector rod. The male die provides movement space for the upper punch and rear ejector rod and the upper punch ejector rod, which reciprocate inside the male die.

[0013] Preferably, the set screw is installed on the male mold to fix the position of the spring, ejector pin and other receiving tooling components, and the ejector pin is connected to the male mold through the spring.

[0014] Preferably, the upper punch works in conjunction with the upper punch pad and other receiving tooling components inside the male mold, the set screw is used to fix the position of the spring and ejector pin inside the male mold, and the upper punch pad is in direct contact with the upper punch, and they cooperate closely during the mold operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Under the elastic restoring force of the spring, the ejector pin can make slight position adjustments according to the actual position and shape of the product. The elasticity of the spring allows the ejector pin to move flexibly within a certain range, thus adapting to products of different sizes and shapes entering the mold. During the movement of the upper punch and upper punch, they work together with the ejector pin to provide stable support and guidance for the product. They can fine-tune the position of the product to ensure that the product can accurately enter the cavity of the male mold, avoiding problems such as tilting, offset or jamming of the product during the mold entry process, thereby effectively improving the unstable material receiving situation.

[0017] 2. The upper punch sleeve acts as a protective sleeve, preventing the upper punch ejector pin from directly colliding or rubbing against other components inside the mold, thus reducing wear on the upper punch ejector pin. Secondly, the structural design of the upper punch sleeve restricts the rotational freedom of the upper punch ejector pin, ensuring that it does not rotate unnecessarily when subjected to enormous pressure. This anti-rotation function ensures stable force transmission during the molding process, allowing the force applied by the upper punch ejector pin to act accurately on the product, which helps improve the quality and precision of product molding. At the same time, stable force transmission also helps protect other components of the mold, preventing damage or instability to the mold structure caused by abnormal rotation of the upper punch ejector pin, thereby effectively preventing the problem of mold bursting after the upper punch ejector pin is subjected to force. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the upper punch rod of this utility model;

[0021] Figure 3 This is a structural diagram of the upward thrust rod of this utility model.

[0022] Illustrations: 1. Top punch ejector pin; 2. Male mold; 3. Set screw; 4. Spring; 5. Ejector pin; 6. Top punch pad; 7. Top punch; 8. Top punch ejector pin; 9. Top punch sleeve. Detailed Implementation

[0023] This application provides a cold heading protective stripping mold for riveted nuts, effectively solving the problem of mold bursting. Original molds are prone to bursting due to issues such as the nut's inability to detach, the upper mold's internal ejector pin being stressed and unstable material receiving. This application designs an optimized cold heading protective stripping mold for riveted nuts, improving mold bursting, unstable product entry and exit, and increasing production efficiency while reducing production costs by adding a receiving device, improving forming tooling, and optimizing the stripping method.

[0024] Example

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, the technical solution in this application embodiment effectively solves the problem of mold bursting, where the original mold is prone to bursting due to reasons such as the nut not being able to be demolded, the ejector pin in the upper mold being stressed and the material receiving being unstable. The overall idea is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a cold heading protective ejection mold for riveting nuts, including a male mold 2. An upper punch rear ejector rod 1 is disposed inside the male mold 2. An upper punch 7 and an upper punch ejector rod 8 are disposed to the right of the upper punch rear ejector rod 1. A set screw 3 is disposed above the upper punch rear ejector rod 1. A spring 4 is fixedly connected to the right surface of the set screw 3. An ejector pin 5 is fixedly connected to the right surface of the spring 4. An upper punch pad 6 is disposed to the right of the ejector pin 5. An upper punch sleeve pad 9 is disposed below the upper punch rear ejector rod 1. The male mold 2 provides movement space for the upper punch rear ejector rod 1 and the upper punch ejector rod 8, which reciprocate within the male mold 2. When the mold is not receiving material, the spring 4 is in a pre-compressed state, storing a certain amount of elastic potential energy. At this time, the spring 4 applies an upward force to the upper punch pad 6 and the upper punch 7 through the ejector pin 5, keeping them in a relatively stable state. Furthermore, it facilitates the initial positioning of the material. When the product begins to enter the mold, the upper punch 7 moves downward under the action of an external driving force, such as the downward movement of the punch press slide. The upper punch pad 6 moves downward along with the upper punch 7. At the same time, under the elastic restoring force of the spring 4, the ejector pin 5 can make slight position adjustments according to the actual position and shape of the product. The elastic characteristics of the spring 4 allow the ejector pin 5 to move flexibly within a certain range, thereby adapting to products of different sizes and shapes entering the mold. During the movement, the upper punch pad 6 and the upper punch 7, through cooperation with the ejector pin 5, jointly provide stable support and guidance for the product. They can fine-tune the position of the product to ensure that the product can accurately enter the cavity of the male mold 2, avoiding problems such as tilting, offsetting or jamming of the product during the mold entry process, thereby effectively improving the unstable material receiving situation.

[0027] The set screw 3 is installed on the male mold 2 to fix the position of the spring 4, ejector pin 5, and other receiving tooling components. The ejector pin 5 is connected to the male mold 2 through the spring 4. The upper punch 7 works in conjunction with the upper punch pad 6 and other receiving tooling components inside the male mold 2. The set screw 3 is used to fix the position of the spring 4 and ejector pin 5 inside the male mold 2. The upper punch pad 6 is in direct contact with the upper punch 7 and they fit tightly together during mold operation. During the product forming stage, the upper punch ejector rod 8 bears a large pressure and is used to apply the force required for forming the product. The upper punch sleeve 9 is tightly fitted around the rod of the upper punch ejector rod 8, providing multiple protections for the upper punch ejector rod 8. First, the upper punch sleeve 9 acts as a protective sleeve to prevent... The upper ejector pin 8 is prevented from directly colliding or rubbing with other parts inside the mold, reducing wear on the upper ejector pin 8. Secondly, the structural design of the upper ejector sleeve 9 restricts the rotational freedom of the upper ejector pin 8, ensuring that the upper ejector pin 8 will not rotate unnecessarily when subjected to huge pressure. This anti-rotation function ensures stable force transmission during the molding process, allowing the force applied by the upper ejector pin 8 to act accurately on the product, which helps improve the quality and precision of product molding. At the same time, stable force transmission also helps protect other parts of the mold, preventing damage or instability to the mold structure caused by abnormal rotation of the upper ejector pin 8, thereby effectively preventing the problem of mold bursting after the upper ejector pin 8 is subjected to force.

[0028] Among them, the upper punch ejector 1 works in conjunction with the upper punch ejector 8 inside the mold. By moving, it pushes the upper punch ejector 8 to remove the blank after molding, preventing the blank from adhering to the upper mold and causing multiple blanks to burst, thus ensuring stable mold operation and continuous production.

[0029] Male mold 2: As the core component of the mold, it provides basic support and cavity shape for the entire molding process, affecting the durability and molding accuracy of the mold. At the same time, it provides movement space for the upper punch ejector pin 1 and upper punch ejector pin 8, ensuring that all components of the mold work together.

[0030] Set screw 3: Installed on male mold 2, used to fix the position of receiving tooling components such as spring 4 and ejector pin 5, to ensure that the receiving tooling is stable in position during mold operation and does not shift, thereby ensuring the accuracy and stability of the receiving process;

[0031] Spring 4: One end is connected to the set screw 3, and the other end is connected to the ejector pin 5. It plays a buffering and auxiliary role in the mold receiving and unloading process. When receiving material, the elastic restoring force enables the ejector pin 5 to be finely adjusted according to the product conditions to adapt to different products. When unloading material, it assists the movement of the ejector pin 5 and other components to ensure smooth unloading.

[0032] Ejector pin 5: It is connected to the male mold 2 through spring 4 and can reciprocate within the male mold 2 under the action of spring 4; when receiving material, it works with the upper punch pad 6 and upper punch 7 under the push of spring 4 to stabilize the product position; when stripping material, its position is adjusted according to the mold status to assist the stripping operation.

[0033] Upper punch pad 6: It is in direct contact with and closely fits the upper punch 7, providing stable support for the upper punch 7; when receiving material, it cooperates with the ejector pin 5 to assist the upper punch 7 in adjusting the product position and ensure that the product enters the mold accurately; during mold operation, it works in conjunction with other components to ensure the overall performance of the mold.

[0034] Upper punch 7: Works in conjunction with upper punch pad 6 and other receiving tooling components inside the male mold 2. When receiving material, it is driven downward by external power and works with other components to stabilize the product position. During the forming process, it applies pressure to the product to form it in the cavity of the male mold 2.

[0035] Upper punch ejector pin 8: It bears a large pressure during the molding process and applies molding force to the product. During stripping, it is pushed by the upper punch ejector pin 1 to generate stripping force, which removes the molded blank from the mold. During the operation, it is protected by the upper punch sleeve 9 to prevent the mold from bursting under force.

[0036] Upper punch sleeve 9: Tightly fitted around the upper punch ejector rod 8, it acts as a protective sleeve to reduce wear on the upper punch ejector rod 8, restrict its rotational freedom, ensure stable transmission of forming force, improve product forming quality and precision, protect other parts of the mold, and prevent mold damage caused by abnormal rotation of the upper punch ejector rod 8.

[0037] Working principle:

[0038] Before the mold begins receiving material, spring 4 is in a pre-compressed state, storing a certain amount of elastic potential energy. At this time, spring 4 applies an upward force to upper punch 6 and upper punch 7 through ejector pin 5, placing them in a relatively stable initial position conducive to receiving material. When the product begins to enter the mold, upper punch 7 moves downward under the action of an external driving force, such as the downward movement of the punch press slide. Upper punch 6 moves downward along with upper punch 7. At the same time, under the elastic restoring force of spring 4, ejector pin 5 can make slight position adjustments according to the actual position and shape of the product. The elastic characteristics of spring 4 allow ejector pin 5 to move flexibly within a certain range, thus adapting to products of different sizes and shapes entering the mold. During the movement, upper punch 6 and upper punch 7, in cooperation with ejector pin 5, jointly provide stable support and guidance for the product. They can fine-tune the position of the product, ensuring that the product can accurately enter the cavity of male mold 2, avoiding problems such as tilting, offsetting, or jamming of the product during mold entry. This effectively improves the unstable material receiving situation. During the product molding stage, the upper punch 8 bears a large pressure and is used to apply the force required for molding the product. The upper punch sleeve 9 tightly fits around the rod of the upper punch 8, providing multiple protections for the upper punch 8. First, as a protective sleeve, the upper punch sleeve 9 prevents the upper punch 8 from directly colliding or rubbing with other parts inside the mold, reducing the wear of the upper punch 8. Second, the structural design of the upper punch sleeve 9 restricts the rotational freedom of the upper punch 8, ensuring that the upper punch 8 will not rotate unnecessarily when subjected to huge pressure. This anti-rotation function ensures the stable transmission of force during the molding process, allowing the force applied by the upper punch 8 to act accurately on the product, which helps to improve the quality and precision of product molding. At the same time, stable force transmission also helps to protect other parts of the mold, preventing damage or instability to the mold structure caused by abnormal rotation of the upper punch 8, thus effectively preventing the problem of mold bursting after the upper punch 8 is subjected to force.

[0039] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A cold-upsetting guard ejection die for a clinch nut, comprising a male die (2), characterized in that, The male die (2) is provided with an upper punch rear ejector rod (1), the right side of the upper punch rear ejector rod (1) is provided with an upper punch (7) and an upper punch ejector rod (8), the upper punch rear ejector rod (1) is provided with a set screw (3) above; Wherein, the right surface of the set screw (3) is fixedly connected with a spring (4), the right surface of the spring (4) is fixedly connected with an ejector pin (5), the right side of the ejector pin (5) is provided with an upper punch pad (6), the lower side of the upper punch rear ejector rod (1) is provided with an upper punch sleeve pad (9).

2. A cold upset protector for a snap ring die as defined in claim 1, wherein: The male die (2) provides a movement space for the upper punch rear ejector rod (1) and the upper punch ejector rod (8), and the two reciprocate in the male die (2).

3. A cold upset protector for a snap ring die as defined in claim 1 wherein: The set screw (3) is installed on the male die (2) and is used for fixing the positions of the spring (4) and the ejector pin (5).

4. A cold upset protector for a snap ring die as defined in claim 1 wherein: The ejector pin (5) is connected with the male die (2) through the spring (4), and the elastic effect of the spring (4) enables the ejector pin (5) to reciprocate in a certain range in the male die (2).

5. A cold upset protector for a snap ring die as defined in claim 1 wherein: The upper punch (7) cooperates with the upper punch pad (6) in the male die (2) to work.

6. A cold upset protector for a snap ring die as defined in claim 1 wherein: The set screw (3) is used for fixing the positions of the spring (4) and the ejector pin (5) in the male die (2), and the upper punch pad (6) directly contacts the upper punch (7) and tightly cooperates with the upper punch (7) during the working process of the mold.

Images