A beam stamping die

Abstract

This utility model provides a beam stamping die, belonging to the field of parts stamping technology. The beam stamping die includes: an upper die base, a lower die base, a stamping rod, a guide sleeve, and a positioning block. The upper die base is connected and fixed to the lower die base by at least four circumferentially distributed ball screws. A vertical through hole is opened at the geometric center of the upper die base, and a receiving cavity coaxial with the vertical through hole is opened at the geometric center of the lower die base. The upper end of the stamping rod is fixedly installed in the vertical through hole of the upper die base, and the lower end of the stamping rod extends into the receiving cavity of the lower die base and maintains a preset distance from the bottom wall of the receiving cavity. The guide sleeve has a cylindrical structure, and the upper flange face of the guide sleeve is fixed to the lower surface of the upper die base by a threaded connection. This utility model can solve the technical problem of poor reliability of the guiding mechanism in existing beam stamping dies.

Description

Technical Field

[0001] This utility model belongs to the field of parts stamping technology, specifically, it relates to a crossbeam stamping die. Background Technology

[0002] In modern manufacturing, crossbeams, as crucial structural components, are widely used in automobile manufacturing, construction engineering, and machinery equipment. Their processing quality directly impacts the performance and safety of the final product. Currently, crossbeam stamping primarily utilizes traditional stamping dies. However, existing stamping dies generally suffer from problems such as unreasonable structural design, difficulty in guaranteeing processing accuracy, and short service life. Traditional stamping dies typically employ a simple upper and lower die base structure, lacking an effective guiding mechanism. This causes the stamping rod to easily shift and wobble during operation, affecting stamping accuracy and processing quality. Simultaneously, existing dies often use fixed clamps for workpiece positioning, which are ill-suited to processing crossbeams of different specifications, resulting in insufficient positioning accuracy and clamping reliability. Furthermore, traditional dies lack effective heat dissipation and friction reduction measures, leading to thermal deformation and accelerated wear during continuous production, severely impacting die life and processing accuracy stability. To address these technical issues, the industry commonly employs methods such as increasing die weight, raising material costs, and frequently replacing wear parts. However, these measures not only increase production costs but also reduce production efficiency, failing to fundamentally solve the problems. Therefore, there is an urgent need to develop a new type of crossbeam stamping die with optimized structure, high precision, and long service life to meet the demands of modern manufacturing for high-quality and high-efficiency production. Utility Model Content

[0003] In view of this, the present invention provides a beam stamping die that can solve the technical problem of poor reliability of the guiding mechanism in the existing beam stamping die.

[0004] This utility model is implemented as follows: This utility model provides a beam stamping die, comprising: an upper die base, a lower die base, a stamping rod, a guide sleeve, and a positioning block; the upper die base is connected and fixed to the lower die base by at least four circumferentially evenly distributed ball screws; a vertical through hole is formed at the geometric center of the upper die base, and a receiving cavity coaxial with the vertical through hole is formed at the geometric center of the lower die base; the upper end of the stamping rod is fixedly installed in the vertical through hole of the upper die base, and the lower end of the stamping rod extends into the receiving cavity of the lower die base and maintains a preset distance from the bottom wall of the receiving cavity; the guide sleeve has a cylindrical structure, and the upper flange face of the guide sleeve is fixed to the lower surface of the upper die base by a threaded connection; the cylindrical part of the guide sleeve surrounds the stamping rod, and a sliding fit relationship is formed between the stamping rod and the inner wall of the guide sleeve; the positioning block is fixedly installed on the inner wall of the receiving cavity of the lower die base, and the positioning block is used to limit the position of the beam to be processed.

[0005] The technical effects of the crossbeam stamping die provided by this utility model are as follows: Through the ball screw connection between the upper die base and the lower die base and the sliding cooperation of the stamping rod in the guide sleeve, a stable and reliable stamping transmission mechanism is formed, which ensures the precise positioning and smooth movement between the components during the stamping process. At the same time, the setting of the positioning block effectively restricts the position of the crossbeam to be processed, improves the accuracy and consistency of stamping processing, and avoids processing defects caused by workpiece position deviation.

[0006] Based on the above technical solution, the crossbeam stamping die of this utility model can be further improved as follows: The upper mold base includes a main plate and a reinforcing rib plate. The main plate has a rectangular plate structure. The reinforcing rib plate is vertically fixed to the upper surface of the main plate. The reinforcing rib plate extends along the length of the main plate and forms a cross-shaped distribution. The vertical through hole is opened at the intersection of the main plate and the reinforcing rib plate.

[0007] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting cross-shaped reinforcing ribs on the main body plate of the upper die holder, the overall rigidity and deformation resistance of the upper die holder are significantly improved, the stress concentration during the stamping process is effectively dispersed, and the upper die holder is prevented from bending and deforming when subjected to stamping load. At the same time, the intersection of the reinforcing ribs and the main body plate serves as the location for setting vertical through holes, further enhancing the structural strength of this key part.

[0008] Furthermore, the stamping rod includes a rod body portion and a stamping head portion. The rod body portion has a cylindrical structure, and the upper end of the rod body portion is fixedly installed in the vertical through hole by an interference fit. The stamping head portion is located at the lower end of the rod body portion and has a conical structure. The apex angle of the conical shape of the stamping head portion ranges from 60 degrees to 90 degrees.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the stamping rod adopts a segmented design of the rod body and the stamping head. The rod body ensures a reliable connection with the upper die base through interference fit. The tapered structure of the stamping head is conducive to stress concentration and material separation during the stamping process. The reasonable design range of the tapered apex angle ensures a balance between stamping effect and service life, thereby improving the efficiency and quality of stamping processing.

[0010] Furthermore, the inner wall of the cylindrical part of the guide sleeve is provided with at least three axially distributed guide grooves, which extend along the axial direction of the guide sleeve. The outer surface of the rod part of the stamping rod is provided with a guide protrusion that cooperates with the guide groove, and the guide protrusion and the guide groove form a sliding guide cooperation relationship.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the axial guide groove on the inner wall of the guide sleeve and the guide protrusion on the outer surface of the stamping rod form a precise linear guide mechanism, which effectively prevents the radial offset and rotation of the stamping rod during the movement process, ensures that the stamping rod always moves along the predetermined trajectory, improves the stamping accuracy, and reduces wear and failures caused by poor guidance.

[0012] Furthermore, the positioning block has an L-shaped cross-section structure, and the positioning block includes a bottom surface fitting part and a side support part. The bottom surface fitting part is horizontally fixed to the bottom wall of the receiving cavity, and the side support part extends vertically upward from the bottom surface fitting part. The inner surface of the side support part is an arc-shaped concave structure, and the radius of curvature of the arc-shaped concave structure matches the outer diameter of the beam to be processed.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the positioning block adopts an L-shaped cross-section structure design, the bottom surface fitting part and the side support part form a stable support system, and the arc concave structure is precisely matched with the outer diameter of the beam to be processed, realizing reliable positioning and clamping of the circular beam, effectively preventing the workpiece from slipping and rotating during processing, and ensuring the accuracy and repeatability of the stamping position.

[0014] Furthermore, a discharge hole is provided at the center of the bottom wall of the receiving cavity of the lower die base. The diameter of the discharge hole is smaller than the maximum outer diameter of the stamping head. The discharge hole is used to discharge stamping waste. A waste collection groove is fixedly installed at the bottom of the lower die base. The waste collection groove is located directly below the discharge hole.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design of the discharge hole on the bottom wall of the lower mold base cavity, together with the waste collection trough, forms a complete waste treatment system. The reasonable control of the discharge hole diameter not only ensures the smooth discharge of waste but also prevents the workpiece from falling in accidentally. The waste collection trough avoids the scattering of waste, keeps the working environment clean, and improves production efficiency and operational safety.

[0016] Furthermore, the upper mold base has multiple heat dissipation grooves on its main body plate surface, which are radially distributed and extend outward from the vertical through hole as the center.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the radial heat dissipation groove design on the upper surface of the mold base plate effectively increases the heat dissipation area, promotes the rapid dissipation of heat generated during the stamping process, prevents mold thermal deformation and material performance deterioration caused by excessive temperature, extends the service life of the mold, and ensures the stability of processing accuracy during continuous production. Compared with existing technologies, the beneficial effects of the crossbeam stamping die provided by this utility model are as follows: This utility model fundamentally solves the technical defects of traditional crossbeam stamping dies through innovative structural design and optimized component configuration. First, the use of a precision ball screw connection system between the upper and lower die bases, combined with the rigidity enhancement design of the reinforcing ribs, ensures the structural stability and accuracy retention of the die under high-intensity stamping loads. Second, the innovative guide sleeve and stamping rod mating mechanism, through the precise fit of the axial guide groove and guide convex strip, achieves high-precision control of the stamping rod's movement trajectory, effectively eliminating radial offset and rotational errors. Third, the arc-shaped concave surface design of the L-shaped section positioning block achieves precise positioning and reliable clamping of the circular crossbeam, significantly improving processing consistency. Finally, through the quenching and hardening treatment of the stamping rod, the application of a friction-reducing coating on the guide sleeve, and the reasonable dimensional ratio design, the durability and processing efficiency of the die are significantly improved, providing a high-precision, high-reliability, and long-life technical solution for crossbeam stamping processing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of a beam stamping die; Figure 2 This is a cross-sectional view of a beam stamping die; Figure 3 This is a top view of a beam stamping die; The attached diagram lists the components represented by each number as follows: 10. Upper mold base; 11. Vertical through hole; 12. Main body plate; 13. Reinforcing rib plate; 14. Heat dissipation groove; 20. Lower mold base; 21. Receiving cavity; 22. Discharge hole; 30. Stamping rod; 31. Rod body part; 32. Stamping head part; 40. Guide sleeve; 50. Positioning block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figure 1-3 The diagram illustrates an embodiment of a beam stamping die provided by this utility model. In this embodiment, it includes: an upper die base, a lower die base, a stamping rod, a guide sleeve, and a positioning block. The upper die base is connected and fixed to the lower die base via at least four circumferentially distributed ball screws. A vertical through hole is formed at the geometric center of the upper die base, and a receiving cavity coaxial with the vertical through hole is formed at the geometric center of the lower die base. The upper end of the stamping rod is fixedly installed in the vertical through hole of the upper die base, and the lower end of the stamping rod extends into the receiving cavity of the lower die base, maintaining a preset distance from the bottom wall of the receiving cavity. The guide sleeve has a cylindrical structure, and its upper flange is fixed to the lower surface of the upper die base via a threaded connection. The cylindrical portion of the guide sleeve surrounds the stamping rod, and a sliding fit is formed between the stamping rod and the inner wall of the guide sleeve. The positioning block is fixedly installed on the inner wall of the receiving cavity of the lower die base, and the positioning block is used to limit the position of the beam to be processed.

[0022] In the above technical solution, the upper mold base includes a main plate and a reinforcing rib plate. The main plate has a rectangular plate structure, and the reinforcing rib plate is vertically fixed on the upper surface of the main plate. The reinforcing rib plate extends along the length of the main plate and forms a cross-shaped distribution. The vertical through hole is opened at the intersection of the main plate and the reinforcing rib plate.

[0023] Furthermore, in the above technical solution, the stamping rod includes a rod body and a stamping head. The rod body has a cylindrical structure, and the upper end of the rod body is fixedly installed in a vertical through hole by an interference fit. The stamping head is located at the lower end of the rod body and has a conical structure. The apex angle of the stamping head ranges from 60 degrees to 90 degrees.

[0024] Furthermore, in the above technical solution, the inner wall of the cylindrical part of the guide sleeve is provided with at least three axially distributed guide grooves, which extend along the axial direction of the guide sleeve. The outer surface of the rod part of the stamping rod is provided with guide protrusions that cooperate with the guide grooves, and the guide protrusions and guide grooves form a sliding guide cooperation relationship.

[0025] Furthermore, in the above technical solution, the positioning block has an L-shaped cross-section structure. The positioning block includes a bottom surface fitting part and a side support part. The bottom surface fitting part is horizontally fixed on the bottom wall of the receiving cavity. The side support part extends vertically upward from the bottom surface fitting part. The inner surface of the side support part is an arc-shaped concave structure. The radius of curvature of the arc-shaped concave structure matches the outer diameter of the beam to be processed.

[0026] Furthermore, in the above technical solution, a discharge hole is provided at the center of the bottom wall of the receiving cavity of the lower die base. The diameter of the discharge hole is smaller than the maximum outer diameter of the stamping head. The discharge hole is used to discharge stamping waste. A waste collection groove is fixedly installed at the bottom of the lower die base. The waste collection groove is located directly below the discharge hole.

[0027] Furthermore, in the above technical solution, the upper surface of the main body plate of the upper mold base is provided with multiple heat dissipation grooves, which are radially distributed and extend outward from the vertical through hole as the center.

[0028] Before use, first check the integrity and fit of each component of the mold, ensuring that the ball screws of the upper and lower mold bases are securely fastened and that the stamping rod slides smoothly without jamming within the guide sleeve. Place the crossbeam to be processed into the receiving cavity of the lower mold base, ensuring that the circular cross-section of the crossbeam fully fits the arc-shaped concave surface of the positioning block, ensuring accurate positioning and stable clamping of the crossbeam. Start the stamping equipment; the upper mold base moves downward under external force, driving the stamping rod downward through the precise guidance of the guide sleeve. The tapered stamping head of the stamping rod first contacts the crossbeam. As the upper mold base continues to press down, the stamping head gradually presses into the crossbeam material, achieving punching or forming processing. Throughout the stamping process, the cooperation of the guide groove and guide convex strip ensures the accuracy of the stamping rod's movement trajectory, and the L-shaped structure of the positioning block maintains the stability of the crossbeam's position. When the preset stamping depth is reached, the upper mold base begins to rise, the stamping rod disengages from the crossbeam, and the stamping waste falls into the waste collection trough through the discharge hole. After completing one stamping cycle, remove the machined crossbeam, inspect the machining quality, and clean the scrap from the scrap collection trough. During continuous production, the heat dissipation groove design effectively dissipates the heat generated during the stamping process, and the anti-friction coating reduces motion resistance, ensuring the mold maintains stable performance during long-term operation. Regularly maintain the mold, check the wear of the stamping rods, clean impurities from the guide sleeves, and replenish the anti-friction coating as needed to ensure the mold's service life and machining accuracy.

[0029] The following is a specific embodiment of this utility model: In this embodiment, the beam stamping die is used to process a circular steel beam with a diameter of 50 mm. The upper die base is made of 45# steel, and the main body plate is a rectangular plate structure with a length of 400 mm, a width of 300 mm, and a thickness of 50 mm. The surface is precision milled, and the flatness is controlled within 0.02 mm. The reinforcing ribs are also made of 45# steel, with a thickness of 20 mm and a height of 80 mm. They are arranged in a cross pattern along the length of the main body plate and are subjected to overall tempering treatment after welding to eliminate stress. The vertical through hole has a diameter of 25 mm and is located at the intersection of the main body plate and the reinforcing ribs. The roundness and cylindricity of the hole are controlled within 0.01 mm. The lower die base is made of 40Cr alloy steel, with an overall size of 450 mm in length, 350 mm in width, and 150 mm in height. The cavity depth is 80 mm, the inner diameter is 120 mm, and the discharge hole diameter on the bottom wall of the cavity is 15 mm. The stamping rod is 200 mm in total length, with a rod body diameter of 24.8 mm. It is made of GCr15 bearing steel and hardened to HRC60 after surface quenching. The stamping head is 30 mm long, with a 75-degree conical apex angle and a precision-ground cone tip. The guide sleeve is made of bronze, with an outer diameter of 60 mm, an inner diameter of 25.2 mm, and a cylindrical length of 120 mm. Three axial guide grooves are cut into the inner wall, each 2 mm wide and 1 mm deep, and the surface is coated with a PTFE anti-friction coating. The positioning block is made of 40Cr alloy steel. The L-shaped cross-section has a bottom contact area measuring 80 mm long, 30 mm wide, and 20 mm thick. The side support is 40 mm high, and the radius of curvature of the concave surface is 25 mm, ensuring a precise fit with the 50 mm diameter crossbeam. The waste collection trough is made of stainless steel, with a capacity of 2 liters, for easy cleaning and replacement. The heat dissipation grooves are arranged radially in eight patterns on the surface of the upper mold base. Each groove is 5 mm wide, 3 mm deep, and 100 mm long. During mold operation, the stamping stroke is 60 mm, the stamping force is 50 tons, and the operating frequency is 30 times per minute. In actual use, the mold can stably punch holes in a 50 mm diameter circular beam, with the punching diameter accuracy controlled within ±0.05 mm and the surface roughness reaching Ra 1.6 micrometers. After 8 hours of continuous operation, the mold temperature rise is controlled below 40 degrees Celsius, and the clearance between various components remains essentially unchanged. After 100,000 stamping cycles, the wear of the stamping rod is less than 0.02 mm, the anti-friction coating on the inner wall of the guide sleeve remains intact, and the overall precision of the mold remains stable. This embodiment fully verifies the effectiveness and practicality of the technical solution of this utility model, providing a high-precision, high-reliability, and long-life technical solution for beam stamping, with significant engineering application value and economic benefits.

[0030] Specifically, the principle of this utility model is as follows: This utility model adopts a modular design concept, optimizing the structural form and matching relationship of each component to form a high-precision and high-reliability stamping system. First, the upper die base adopts a combination structure of a main body plate and reinforcing ribs. The reinforcing ribs are distributed in a cross pattern along the length of the main body plate. This design can effectively distribute the stamping load, improve the overall rigidity of the die, and prevent bending deformation under high loads. The precise matching between the stamping rod and the guide sleeve is a key technology to ensure stamping accuracy. The axial guide groove on the inner wall of the guide sleeve and the guide protrusion on the outer surface of the stamping rod form a multi-point contact linear guide mechanism, ensuring that the stamping rod maintains a precise movement trajectory throughout its entire stroke range. The L-shaped cross-section design of the positioning block fully utilizes the stability principle of geometric structures. The bottom contact part provides horizontal support, the side support part provides radial constraint, and the precise matching of the arc concave surface with the outer diameter of the crossbeam achieves surface contact positioning, greatly improving positioning accuracy and clamping reliability. The segmented design of the stamping rod allows for optimization of the rod body and stamping head according to different working requirements. The rod body uses an interference fit to ensure reliable connection, while the tapered structure of the stamping head facilitates stress concentration and material separation. The application of quenching hardening treatment and anti-friction coatings solves wear resistance and friction issues from a materials science perspective. A hardness range of HRC58 to HRC62 ensures a sufficient balance between strength and toughness, while the anti-friction coating reduces the coefficient of friction and improves motion smoothness. The radial distribution design of the heat dissipation grooves, based on heat transfer principles, increases the heat dissipation area, promotes rapid heat dissipation, and prevents thermal deformation. The comprehensive application of these technical principles solves the technical problems existing in traditional stamping dies from multiple perspectives, including structural mechanics, materials science, and heat transfer.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A beam stamping die, characterized in that, include: The assembly comprises an upper die base, a lower die base, a stamping rod, a guide sleeve, and a positioning block. The upper die base is connected and fixed to the lower die base via at least four circumferentially distributed ball screws. A vertical through hole is formed at the geometric center of the upper die base, and a receiving cavity coaxial with the vertical through hole is formed at the geometric center of the lower die base. The upper end of the stamping rod is fixedly installed in the vertical through hole of the upper die base, and the lower end of the stamping rod extends into the receiving cavity of the lower die base, maintaining a preset distance from the bottom wall of the receiving cavity. The guide sleeve has a cylindrical structure, and its upper flange is fixed to the lower surface of the upper die base via a threaded connection. The cylindrical portion of the guide sleeve surrounds the stamping rod, and a sliding fit is formed between the stamping rod and the inner wall of the guide sleeve. The positioning block is fixedly installed on the inner wall of the receiving cavity of the lower die base, and the positioning block is used to limit the position of the beam to be processed.

2. The beam stamping die according to claim 1, characterized in that, The upper mold base includes a main plate and a reinforcing rib plate. The main plate has a rectangular plate structure. The reinforcing rib plate is vertically fixed to the upper surface of the main plate. The reinforcing rib plate extends along the length of the main plate and forms a cross-shaped distribution. The vertical through hole is opened at the intersection of the main plate and the reinforcing rib plate.

3. The beam stamping die according to claim 2, characterized in that, The stamping rod includes a rod body and a stamping head. The rod body has a cylindrical structure, and the upper end of the rod body is fixedly installed in the vertical through hole by an interference fit. The stamping head is located at the lower end of the rod body and has a conical structure. The apex angle of the conical shape of the stamping head ranges from 60 degrees to 90 degrees.

4. The beam stamping die according to claim 3, characterized in that, The inner wall of the cylindrical part of the guide sleeve is provided with at least three axially distributed guide grooves, which extend along the axial direction of the guide sleeve. The outer surface of the rod part of the stamping rod is provided with a guide protrusion that cooperates with the guide groove. The guide protrusion and the guide groove form a sliding guide cooperation relationship.

5. A beam stamping die according to claim 4, characterized in that, The positioning block has an L-shaped cross-section structure. The positioning block includes a bottom surface fitting part and a side support part. The bottom surface fitting part is horizontally fixed to the bottom wall of the receiving cavity. The side support part extends vertically upward from the bottom surface fitting part. The inner surface of the side support part is an arc-shaped concave structure. The radius of curvature of the arc-shaped concave structure matches the outer diameter of the beam to be processed.

6. A beam stamping die according to claim 5, characterized in that, A discharge hole is provided at the center of the bottom wall of the receiving cavity of the lower die base. The diameter of the discharge hole is smaller than the maximum outer diameter of the stamping head. The discharge hole is used to discharge stamping waste. A waste collection groove is fixedly installed at the bottom of the lower die base. The waste collection groove is located directly below the discharge hole.

7. A beam stamping die according to claim 6, characterized in that, The upper mold base has multiple heat dissipation grooves on its main plate surface. The multiple heat dissipation grooves are radially distributed and extend outward from the vertical through hole as the center.

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