Stretch forming mechanism for thin convex hulls

Abstract

The utility model discloses a kind of stretch forming mechanism of thin convex bundle, including punch, its lower end is equipped with first operation section for the first operation section of product thinning stretch;Material is removed into son, be located around punch, for compacting product in the stamping process;Die, located below material is removed into son, and is equipped with the guide way of forming;Jack, movably be set in guide way;Wherein, product has convex bundle, convex bundle is integrally constituted by tubular section and cup section;Guide way cooperates with first operation section, for the thinning stretch of material to form tubular section;Jack is used to material reverse piling to the bottom area of product, to form cup section. Adopt the utility model by punch and guide way cooperation complete thinning stretch, simultaneously using jack implementation reverse piling, can make the tubular section of convex bundle and cup section one-time forming, effectively solved the extrusion and pull break problem in traditional technology, and improved forming stability.

Description

Technical Field

[0001] This utility model relates to the field of stamping and forming, specifically to a stretching and forming mechanism for a thin convex hull. Background Technology

[0002] Aluminum and aluminum alloys are widely used in electronics, automobiles, medical devices and other fields due to their lightweight, corrosion resistance and good formability. Among them, aluminum convex cladding structures are particularly important because they can meet the functional requirements of component assembly and protection. Thinning and stretching is one of the core technical paths to achieve this structure.

[0003] Currently, the industry mostly uses conventional punch-based thinning and stretching solutions. While these can achieve basic forming, they sometimes encounter problems in actual production, such as difficulty in controlling material flow, extrusion, and localized tearing, resulting in low product yield and difficulty in adapting to high-precision production scenarios. As downstream industries continue to increase their requirements for dimensional accuracy, structural stability, and production efficiency of aluminum embossed products, existing processes sometimes cannot meet the actual application needs. Therefore, it is necessary to optimize and improve the aluminum embossed thinning and stretching mechanism to enhance product quality and production stability. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a stretching and forming mechanism for a thin convex hull.

[0005] To solve the above problems, this utility model provides a stretching and forming mechanism for a thin convex hull. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows: A thin convex hull stretching forming mechanism includes: a punch with a first working section at its lower end for thinning and stretching a product; a stripper located around the punch for pressing the product during the stamping process; a die located below the stripper and having a forming guide channel; and an ejector pin movably disposed within the guide channel. The product has a convex hull, which is integrally formed from a tubular segment and a cup-shaped segment. The guide channel cooperates with the first working section for thinning and stretching the material to form the tubular segment. The ejector pin is used to push the material back to the bottom region of the product to form the cup-shaped segment.

[0006] As a further improvement of this utility model, the lower end of the first working section of the punch is provided with a flat end face and a guide slope arranged around the flat end face.

[0007] As a further improvement of this utility model, the punch further includes a second section connected to the first working section, the diameter of the second section being larger than the diameter of the first working section.

[0008] As a further improvement of this utility model, the first working section and the second section can form a blind hole cavity on one side of the product, and the blind hole cavity is located inside the convex hull.

[0009] As a further improvement of this utility model, the upper end of the top rod is provided with a positioning protrusion, which is used to cooperate with the bottom center of the product during the molding process.

[0010] As a further improvement of this utility model, the positioning protrusion is a cylinder with a length-to-diameter ratio of less than 0.5.

[0011] As a further improvement of this utility model, the punch and the push rod are arranged coaxially, and the outer diameter of the first working section is smaller than the inner diameter of the guide channel.

[0012] As a further improvement of this utility model, it also includes a base, on which the die and the ejector pin are mounted.

[0013] As a further improvement of this utility model, the positioning protrusion and the flat end face are completely coincident along the axial direction.

[0014] The beneficial technical effects of using the thin convex hull stretch forming mechanism of this application are: The tubular section is thinned and stretched through precise stamping coordination between the guide channel and the first working section of the punch. At the same time, the cup-shaped section is formed by reverse forming with a push rod, which clarifies the forming path and stress direction of the material, effectively reducing the material extrusion problem caused by disordered material flow in traditional processes and improving the stability of the thinning and stretching process.

[0015] The convex tube segment and the cup segment are integrally molded using the same mechanism, eliminating the need for additional splicing or secondary processing. This ensures the integrity and overall stability of the convex structure while avoiding dimensional deviations caused by multi-process manufacturing, significantly improving product structural consistency.

[0016] Finally, the counter-rocking effect of the push rod and the clamping function of the stripper work together to make the material more evenly stressed during the forming process, avoid local stress concentration, reduce the risk of local tearing that is prone to occur in traditional stretching processes, and thus improve the product qualification rate. Attached Figure Description

[0017] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of one embodiment of the present invention; Figure 2 This is a partial enlarged view of point A in one embodiment of this utility model; Figure 3This is a structural schematic diagram of a product according to one embodiment of the present invention.

[0019] 1-Punch; 11-First working section; 111-Flat end face; 112-Guide slope; 12-Second section; 2-Ejector; 3-Product; 31-Blind hole cavity; 4-Die; 41-Guide channel; 5-Ejector pin; 51-Positioning protrusion; 6-Protrusion; 61-Cup-shaped section; 62-Tube-shaped section; 7-Base. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments: In order to achieve the purpose of this utility model, such as Figures 1 to 3 A thin convex hull stretching forming mechanism includes: a punch 1, the lower end of which is provided with a first working section 11 for thinning and stretching a product 3; a stripper 2, disposed around the punch 1, for pressing the product 3 during the stamping process; a die 4, located below the stripper 2, and provided with a forming guide channel 41; and an ejector pin 5, movably disposed within the guide channel 41. The product 3 has a convex hull 6, which is integrally formed by a tubular section 62 and a cup-shaped section 61. The guide channel 41 cooperates with the first working section 11 for thinning and stretching the material to form the tubular section 62. The ejector pin 5 is used to push the material back to the bottom region of the product 3 to form the cup-shaped section 61.

[0021] The cup-shaped segment 61 is formed by the material being deposited at the bottom of the product under the reverse action of the push rod 5, while the tubular segment 62 is formed by the material being thinned and stretched within the guide channel 41 of the die 4. The beneficial effects of adopting the above technical solution are as follows: by cooperating with the first working section 11 of the punch 1 to perform thinning and stretching, and simultaneously using the push rod 5 for reverse pressing, the tubular section 62 and the cup-shaped section 61 of the convex bulge 6 are completed simultaneously in one forming process. This method clarifies the material flow path and force direction, fundamentally solving the problems of material extrusion and easy tearing caused by disordered material flow in traditional processes, and significantly improving the stability of the forming process.

[0022] like Figure 2 As shown, in some other embodiments of this utility model, the lower end of the first working section 11 of the punch 1 is provided with a flat end face 111 and a guide slope 112 arranged around the flat end face 111.

[0023] The guide slope 112 is used to guide the material flow during the thinning and stretching process, reducing material extrusion and tearing.

[0024] The beneficial effects of adopting the above technical solution are: the guide slope 112 can effectively guide and sort the material flow during the thinning and stretching process, so that the material can enter the guide channel 41 more smoothly, further reducing local stress concentration and material accumulation, thereby reducing the risk of extrusion and tearing.

[0025] In some other embodiments of the present invention, the punch 1 further includes a second section 12 connected to the first working section 11, the diameter of the second section 12 being larger than the diameter of the first working section 11.

[0026] The beneficial effect of adopting the above technical solution is that it forms a stepped structure. During the molding process, this design can pre-form a region with a specific diameter transition on product 3, providing a better initial material distribution for subsequent thinning, stretching, and reverse upsetting, thus helping to improve molding accuracy.

[0027] like Figure 3 As shown, in some other embodiments of this utility model, the first working section 11 and the second section 12 can form a blind hole cavity 31 on one side of the product 3, and the blind hole cavity 31 is located inside the convex bulge 6.

[0028] The beneficial effects of adopting the above technical solution are: the blind cavity 31 constitutes the basic space for forming the convex hull 6, so that the material has a clear space for accommodation and deformation during thinning, stretching and reverse upsetting, thus ensuring the integrity of the internal structure of the convex hull 6.

[0029] like Figure 2 As shown, in some other embodiments of this utility model, the upper end of the top rod 5 is provided with a positioning protrusion 51, which is used to cooperate with the bottom center of the product 3 during the molding process.

[0030] The protrusion 51 is used to position product 3 and prevent it from swinging during the reverse pile process.

[0031] The beneficial effects of adopting the above technical solution are: the positioning protrusion 51 can precisely match the center of the bottom of the product 3 during the reverse forming process. This positioning method effectively prevents the product 3 from shifting or swaying when subjected to reverse forming force, ensuring that the reverse forming force acts on the center, thereby improving the forming quality and shape controllability of the cup-shaped segment 61. It also ensures that the material flowing during the stamping process does not significantly deviate to one side.

[0032] In some other embodiments of this utility model, the positioning protrusion 51 is a cylinder with a length-to-diameter ratio of less than 0.5.

[0033] The beneficial effects of adopting the above technical solution are: the short cylindrical structure gives it sufficient bending stiffness and stability. When the reverse pier is under stress, this short and thick protrusion 51 is not easily deformed or tilted, and can reliably maintain its positioning function, ensuring the repeatability accuracy of the forming process.

[0034] In some other embodiments of this utility model, the punch 1 and the push rod 5 are arranged coaxially, and the outer diameter of the first working section 11 is smaller than the inner diameter of the guide channel 41.

[0035] The inner diameter of the guide channel 41 matches the outer diameter of the tubular section 62 to achieve thinning and stretching.

[0036] The beneficial effect of adopting the above technical solution is that it forms a precise thinning and stretching gap. This coaxial and gap-fitting relationship ensures that the material flows and thins evenly and smoothly between the punch 1 and the die 4, which is the key to achieving stable and high-quality tubular segment 62 forming.

[0037] In some other embodiments of this utility model, a base 7 is also included, and a die 4 and a push rod 5 are mounted on the base 7.

[0038] The beneficial effects of adopting the above technical solution are: it provides a stable and reliable installation benchmark and support foundation for the entire forming mechanism. This enhances the overall rigidity and stability of the mechanism when subjected to continuous stamping loads, ensuring long-term, high-precision production operation.

[0039] In some other embodiments of this utility model, the positioning protrusion 51 and the flat end face 111 are completely overlapped along the axial direction.

[0040] That is, from the perspective of the axial direction, the positioning tip 51 and the flat end face 111 are two circles of the same size.

[0041] The beneficial effects of adopting the above technical solution are: it means that the center point of the anti-anchoring action is perfectly aligned with the center of the end face of the thinning and stretching action. This precise alignment ensures that the material is subjected to more balanced and centered forces in the vertical direction, which can improve the shape control accuracy of the anti-anchoring process.

[0042] In another embodiment, the mechanism is used to form a convex 6 made of aluminum or aluminum alloy. The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A stretching and forming mechanism for a thin convex hull, characterized in that, include: The punch has a first working section at its lower end for thinning and stretching the product. The stripper is located around the punch and is used to press the product firmly during the stamping process; The die cavity is located below the stripper and is equipped with a guide channel for forming. The top rod is movably installed within the guide channel; The product has a convex hull, which is integrally formed by a tubular segment and a cup-shaped segment; The guide channel works in conjunction with the first working section to thin and stretch the material to form a tubular segment; the top rod is used to push the material back to the bottom area of ​​the product to form a cup-shaped segment.

2. The stretching and forming mechanism for a thin convex hull according to claim 1, characterized in that: The lower end of the first working section of the punch is provided with a flat end face and a guide slope arranged around the flat end face.

3. The stretching and forming mechanism for a thin convex hull according to claim 1, characterized in that: The punch also includes a second section connected to the first working section, the diameter of which is larger than that of the first working section.

4. The stretching and forming mechanism for a thin convex hull according to claim 3, characterized in that: The first and second working sections can form a blind cavity on one side of the product, and the blind cavity is located inside the convex hull.

5. The stretching and forming mechanism for a thin convex hull according to claim 2, characterized in that: The upper end of the top rod is provided with a positioning protrusion, which is used to cooperate with the bottom center of the product during the molding process.

6. The stretching and forming mechanism for a thin convex hull according to claim 5, characterized in that: The positioning protrusion is a cylinder with a length-to-diameter ratio of less than 0.

5.

7. The stretching and forming mechanism for a thin convex hull according to claim 1, characterized in that: The punch and the push rod are arranged coaxially, and the outer diameter of the first working section is smaller than the inner diameter of the guide rail.

8. The stretching and forming mechanism for a thin convex hull according to claim 1, characterized in that: It also includes a base, on which the die and ejector pin are mounted.

9. The stretching and forming mechanism for a thin convex hull according to claim 5, characterized in that: The positioning protrusion and the flat end face are completely aligned axially.

Images