End cone forming die

Abstract

The utility model discloses an end cone forming die, which relates to the field of die equipment, and comprises a first die holder and a second die holder arranged opposite to the first die holder, the first die holder is provided with a concave cavity, the second die holder is provided with a convex die core matched with the concave cavity in shape, and the convex die core is provided with a concave cavity. The male die core and the concave cavity are in butt joint to define a forming cavity of the end cone, the male die core comprises a first side face and a second side face adjacent to the first side face, and the first side face and the second side face incline in the trend of being close to each other in the direction close to the concave cavity. The utility model has the advantages of simplified process and high processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of mold equipment, in particular to an end cone forming mold. Background Art

[0002] The end cone is a critical component in a vehicle's exhaust system, typically located at the hot end of the system, particularly before or after the catalytic converter. Its primary function is to optimize airflow, ensuring smooth passage of exhaust gases through the exhaust system and reducing backpressure, thereby improving engine performance and efficiency.

[0003] End cones are usually made using a stamping process on machine tools and require processes such as mold forming and shaping. However, the mold shape design in the existing technology is unreasonable, resulting in a large deviation between the processed semi-finished product and the target shape of the end cone, increasing the difficulty and workload of the subsequent shaping process and affecting the efficiency of the entire processing process. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides an end cone forming die, which has the advantages of simplified process and high processing efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A end cone forming mold includes a first mold base and a second mold base arranged opposite to the first mold base, the first mold base has a concave cavity, the second mold base has a male mold core matching the shape of the concave cavity, the male mold core is docked with the concave cavity to enclose the forming cavity of the end cone, the male mold core includes a first side surface and a second side surface adjacent to the first side surface, and in the direction approaching the concave cavity, the first side surface and the second side surface are inclined with a tendency to approach each other.

[0007] In the present application, the punch core includes a first side surface and a second side surface adjacent to the first side surface. The first side surface and the second side surface are inclined in a direction close to the cavity with a tendency to approach each other, so that the shape of the punch core is closer to the outer shape of the end cone (conical). The shape of the product after mold forming is also closer to the outer shape of the end cone. Only a small amount of trimming is required in the subsequent shaping steps, and there is no need for a large amount of shaping work, which simplifies the processing process and improves processing efficiency.

[0008] Optionally, the slope of the first side surface is greater than the slope of the second side surface.

[0009] Optionally, the slope of the first side surface is 60° to 80°.

[0010] Optionally, the slope of the second side surface is 20° to 40°.

[0011] Optionally, the first mold base includes a base and a first template, the cavity is opened on the base, and the first template is fixed to the base.

[0012] Optionally, the second mold base includes a second template fixedly connected to the male mold core, a positioning sleeve is provided on the first template, and a positioning rod corresponding to the positioning sleeve is provided on the second template, and the positioning rod extends into the positioning sleeve.

[0013] Optionally, the second template is constructed in a rectangular shape, and the positioning rods are configured in plurality, and the plurality of positioning rods are distributed around the second template.

[0014] Optionally, a bottom plate is provided on a side of the second mold base away from the first mold base, and the bottom plate is connected to the second mold plate via a plurality of support plates arranged at intervals.

[0015] Optionally, the second mold base includes a pressure ring arranged around the male mold core.

[0016] Optionally, the second mold base further includes a push rod for abutting the blank holder and a driving plate for driving the push rod to move, and when the driving plate moves toward the cavity, the push rod abuts the blank holder and moves toward the cavity.

[0017] These features and advantages of the present invention will be detailed in the following detailed description and accompanying drawings. The preferred embodiments or means of the present invention will be fully illustrated in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. Furthermore, although multiple features, elements, and components may be present and are labeled with different symbols or numbers for convenience, they all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Explosion diagram of

[0021] Figure 3 for Figure 2 sectional view of

[0022] Figure 4 for Figure 1 sectional view of

[0023] Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle.

[0024] Among them, 1. First mold base; 11. Base; 111. Concave cavity; 12. First template; 121. Positioning sleeve; 2. Second mold base; 21. Punch core; 211. First side surface; 212. Second side surface; 22. Pressure ring; 23. Second template; 231. Positioning rod; 24. Bottom plate; 25. Support plate; 26. Push rod; 27. Drive plate. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to explain the present invention and are not to be construed as limiting the present invention.

[0026] Reference in this specification to "one embodiment," "an example," or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0027] Example:

[0028] like Figures 1 to 3 As shown, this embodiment provides an end cone forming mold for initially forming a sheet, including a first mold base 1 and a second mold base 2 arranged opposite to the first mold base 1, the first mold base 1 has a concave cavity 111, the second mold base 2 has a male mold core 21 that matches the shape of the concave cavity 111, the male mold core 21 is docked with the concave cavity 111 to enclose a forming cavity of the end cone, the male mold core 21 includes a first side surface 211 and a second side surface 212 adjacent to the first side surface 211, and in the direction approaching the concave cavity 111, the first side surface 211 and the second side surface 212 are inclined with a tendency to approach each other.

[0029] In this embodiment, the end cone forming mold includes a first mold base 1 and a second mold base 2 arranged up and down. In other embodiments, the first mold base 1 and the second mold base 2 can also be arranged left and right according to actual production needs, which is not limited here. The first mold base 1 is provided with a concave cavity 111, and the second mold base 2 is provided with a convex mold core 21 for docking with the concave cavity 111. The convex mold core 21 matches the shape of the concave cavity 111 to process a thin-walled part. The sheet to be processed is placed between the first mold base 1 and the second mold base 2, and the first mold base 1 and the second mold base 2 are moved toward or away from each other to realize the action of closing and opening the mold, thereby completing the forming process of the sheet. Figure 3 、 Figure 4 and Figure 5As shown, when the male mold core 21 and the female cavity 111 move toward each other and dock, the two enclose a molding cavity for the initial molding of the sheet. The sheet is extruded in the molding cavity to form a semi-finished product with a shape close to the end cone. The semi-finished product is subsequently stretched, shaped, and other processes to finally obtain the end cone finished product. In the related art, the male mold core 21 is mostly cylindrical, so the sheet after molding is also cylindrical. When the end cone finished product with a nearly conical shape is subsequently made, it needs to undergo multiple shaping. In this embodiment, the male mold core 21 includes a first side surface 211 and a second side surface 212 adjacent to the first side surface 211. The first side surface 211 and the second side surface 212 are inclined in a direction close to the female cavity 111 with a tendency to approach each other, so that the shape of the male mold core 21 is closer to the outer shape of the end cone (conical), and the shape of the sheet after molding is also closer to the outer shape of the end cone. In the subsequent shaping step, only a small amount of trimming is required, and no large amount of shaping work is required, which simplifies the processing process and improves the processing efficiency.

[0030] In addition, the punch core 21 can also be in other special shapes to meet the production requirements of end cones or other special-shaped parts of different shapes and sizes, such as parabolic shapes, compound curve shapes, multi-segment cone shapes, and irregular shapes.

[0031] In this embodiment, the first side surface 211 and the second side surface 212 are seamlessly integrated. In other embodiments, the first side surface 211 and the second side surface 212 may be separately connected. In this embodiment, the end cone forming mold is used to produce end cones. In other embodiments, it can also be used to produce other workpieces by simply changing the shapes of the cavity 111 and the punch core 21.

[0032] like Figure 4 As shown, the slope of the first side surface 211 is greater than the slope of the second side surface 212 .

[0033] In this embodiment, the slope of the first side 211 is defined as the angle between the tangent of the first side 211 and the horizontal plane (the plane perpendicular to the axis of the punch core 21), and the slope of the second side 212 is defined as the angle between the tangent of the second side 212 and the horizontal plane. That is, both sides are inclined curved surfaces and both intersect with a common horizontal plane. On each of these two sides, find a point of the same height and draw the tangents of these two points. Then, the tangent of the first side 211 must be steeper than the tangent of the second side 212 (i.e., the angle with the horizontal plane is larger), that is, the slope of the first side 211 is greater than the slope of the second side 212. Alternatively, use mathematical software or tools to fit the first side 211 and the second side 212 to mathematical curves, and calculate the derivative of the fitted curve. The derivative represents the slope of the curve at a certain point, that is, the slope of the point. Substituting the derivatives of the two side fitting curves into the same point for comparison can also determine their relative sizes.

[0034] The slope of the first side surface 211 is 60° to 80°.

[0035] In this embodiment, the angle between a tangent line at a point on the first side surface 211 and a horizontal plane (here, a plane perpendicular to the axis of the punch core 21) is between 60 and 80 degrees. The first side surface 211 has a relatively large inclination. This large inclination can also improve material flowability and product demolding performance, thereby enhancing product molding quality and production efficiency. The design of the inclination angle also needs to be comprehensively considered based on specific process requirements, product shape, and mold manufacturing conditions.

[0036] The slope of the second side surface 212 is 20° to 40°.

[0037] In this embodiment, the angle between a tangent line at a certain point on the second side surface 212 and a horizontal plane (a plane perpendicular to the axis of the punch core 21) is between 20 and 40 degrees. Compared to the slope of the first side surface 211, the slope of the second side surface 212 is smaller, indicating that its inclination is relatively gentle.

[0038] The first mold base 1 includes a base 11 and a first mold plate 12 . The cavity 111 is formed on the base 11 , and the first mold plate 12 is fixedly connected to the base 11 .

[0039] In this embodiment, the base 11 is the main supporting part of the first mold base 1. A cavity 111 for accommodating and molding the sheet is provided on the base 11. The shape, size, and position of the cavity 111 are determined according to the shape of the desired molded product. The first template 12 is fixed to the stamping machine, and the first template 12 is fixedly connected to the base 11 so that the first mold base 1 is also fixed to the machine. The first template 12 and the base 11 are detachably connected by bolts, studs, etc. For large molds or molds that need to withstand greater pressure, a higher-strength fixing method such as welding or bolting is usually adopted. In other embodiments, the base 11 and the first template 12 can also be an integrated structure.

[0040] Furthermore, the base 11 can be designed with multiple cavities 111 based on actual production requirements. This design can help spread the mold manufacturing costs, as the manufacturing cost of each cavity 111 is lower than that of a single mold. Furthermore, due to the improved production efficiency, the production cost per unit product is also reduced. The multiple cavities 111 on the base 11 can be designed in different shapes and sizes to meet the production requirements of different products, allowing the mold to more quickly adapt to market changes or changes in customer needs.

[0041] The second die base 2 includes a second die plate 23 fixed to the punch core 21 . A positioning sleeve 121 is provided on the first die plate 12 . A positioning rod 231 corresponding to the positioning sleeve 121 is provided on the second die plate 23 . The positioning rod 231 extends into the positioning sleeve 121 .

[0042] In this embodiment, the second template 23 is fixedly connected to the punch core 21, and the second template 23 plays the role of supporting and protecting the punch core 21. During the stamping process, the second template 23 and the first template 12 move toward each other, and the punch core 21 is inserted into the cavity 111 to form a molding cavity. The positioning sleeve 121 is set on the first template 12, and the positioning rod 231 is set on the second template 23. The positioning sleeve 121 is constructed as a cylinder with an inner hole. The shape and size of the inner hole match the positioning rod 231. That is, the positioning sleeve 121 is used to receive and position the positioning rod 231. The cooperation between the positioning sleeve 121 and the positioning rod 231 can ensure the accurate position of the punch core 21 and the cavity 111 during the stamping process, prevent the punch core 21 and the cavity 111 from being offset or misaligned, thereby ensuring the precision of the mold and the quality of the product. In other embodiments, the positioning sleeve 121 can also be installed on the second template 23, and accordingly, the positioning rod 231 should be installed on the first template 12. Precise guiding and positioning functions can shorten the closing time of the mold and improve production efficiency. The stable mold structure helps to reduce failures and downtime during the production process, further improving production efficiency.

[0043] The second template 23 is constructed in a rectangular shape, and a plurality of positioning rods 231 are configured. The plurality of positioning rods 231 are distributed around the second template 23 .

[0044] In this embodiment, positioning rods 231 are distributed around the second mold plate 23 to improve mold precision and stability. Multiple positioning rods 231 guide the movement of the second mold plate 23 during mold closing and ensure accurate alignment with the first mold plate 12, ensuring uniform support and guidance for all parts of the second mold plate 23. This also increases the overall rigidity and stability of the mold, reducing deformation or vibration caused by uneven force. The positioning rods 231 are typically cylindrical for ease of machining and provide stable guidance when mated with the positioning sleeve 121. The cylindrical shape also reduces frictional resistance during mold closing. In other embodiments, the positioning rods 231 may be designed with a tapered shape to facilitate insertion into the positioning sleeve 121 during mold closing. Furthermore, to increase strength, the ends of the positioning rods 231 may be thickened or threaded. The positioning sleeve 121 is typically secured to the first mold plate 12 by press-fitting, threading, or welding. During installation, ensure that the axis of the positioning sleeve 121 aligns with the mold's forming axis. Alternatively, the inner hole of the positioning sleeve 121 may be designed to be tapered or have a slight taper to better cooperate with the positioning rod 231. In addition, in order to increase wear resistance, the inner wall of the positioning sleeve 121 may be specially treated, such as sandblasting or nitriding.

[0045] For the purpose of standardization and easy processing and installation, the first template 12 and the second template 23 are usually designed to be rectangular. The rectangular structure can provide stable support and is also convenient for coordination with other mold components such as the positioning rod 231, the positioning sleeve 121, etc. In certain specific applications, the first template 12 may contain special shape elements, such as arc-shaped edges or bevels designed for the cavity 111, to better adapt to the shape of the product. In addition, in order to adapt to high-pressure forming, the thickness of the first template 12 can be increased to provide additional strength and stability. In order to reduce the overall weight of the mold, weight-reducing holes or grooves may be designed on the first template 12 and the second template 23, which reduce the material consumption and production cost of the mold while ensuring strength.

[0046] A bottom plate 24 is provided on a side of the second mold base 2 away from the first mold base 1 . The bottom plate 24 is connected to the second mold plate 23 via a plurality of support plates 25 that are spaced apart.

[0047] In this embodiment, the base plate 24 is a solid, flat surface located on the side of the second mold base 2 facing away from the first mold base 1. It supports and stabilizes the second mold plate 23. The base plate 24 is movably mounted on the machine tool, providing greater flexibility for the mold. The support plates 25 serve as a bridge connecting the base plate 24 and the second mold plate 23. These plates are constructed as multiple, spaced-apart, plate-like structures to ensure a secure and flexible connection between the base plate 24 and the second mold plate 23. The number and location of the support plates 25 may vary depending on the specific design and usage requirements of the mold.

[0048] The second die base 2 includes a blank holder 22 arranged around the punch core 21 .

[0049] In this embodiment, the blank holder 22 and the punch core 21 are integrally formed, which simplifies the structure of the mold and enhances the connection strength between the blank holder 22 and the punch core 21, thereby improving the overall rigidity and durability of the mold. The integrally formed blank holder 22 can more effectively prevent the material from flowing around during the stamping process, avoid wrinkling of the workpiece, and ensure the precision and surface quality of the stamped parts. In other embodiments, the blank holder 22 and the punch core 21 can also be separately provided to provide greater flexibility, allowing the blank holder 22 to be handled separately during mold maintenance or replacement, reducing maintenance costs and time. At the same time, the separately provided blank holder 22 can also be customized according to specific stamping requirements and material properties to further optimize the stamping effect.

[0050] The second die base 2 further includes a push rod 26 for abutting the edge holder 22 and a driving plate 27 for driving the push rod 26 to move. When the driving plate 27 moves toward the cavity 111 , the push rod 26 abuts the edge holder 22 and moves toward the cavity 111 .

[0051] In this embodiment, the push rod 26 is used to abut the blank holder 22. Under the action of the driving plate 27, the push rod 26 can push the blank holder 22 to move toward the cavity 111. The driving plate 27 is connected to the push rod 26 and drives the push rod 26 to move, and can transmit the driving force of the power source (such as a hydraulic cylinder, a pneumatic cylinder, etc.) to the push rod 26.

[0052] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are included within the scope of the claims.

Claims

1. An end cone forming die, comprising a first die base (1) and a second die base (2) arranged opposite to the first die base (1), wherein the first die base (1) has a concave cavity (111), and the second die base (2) has a convex die core (21) whose shape matches the concave cavity (111), and the convex die core (21) and the concave cavity (111) are docked to enclose a forming cavity of the end cone, characterized in that: The male mold core (21) includes a first side surface (211) and a second side surface (212) adjacent to the first side surface (211), and in a direction approaching the concave cavity (111), the first side surface (211) and the second side surface (212) are inclined with a tendency to approach each other.

2. The end cone forming die according to claim 1, characterized in that: The slope of the first side surface (211) is greater than the slope of the second side surface (212).

3. The end cone forming die according to claim 2, characterized in that: The slope of the first side surface (211) is 60° to 80°.

4. The end cone forming die according to claim 2, characterized in that: The slope of the second side surface (212) is 20° to 40°.

5. The end cone forming die according to any one of claims 1 to 4, characterized in that: The first mold base (1) comprises a base (11) and a first template (12); the concave cavity (111) is provided on the base (11); and the first template (12) is fixedly connected to the base (11).

6. The end cone forming die according to claim 5, characterized in that: The second mold base (2) includes a second mold plate (23) fixedly connected to the male mold core (21); a positioning sleeve (121) is provided on the first mold plate (12); a positioning rod (231) corresponding to the positioning sleeve (121) is provided on the second mold plate (23); and the positioning rod (231) extends into the positioning sleeve (121).

7. The end cone forming die according to claim 6, characterized in that: The second template (23) is constructed in a rectangular shape, and the positioning rods (231) are configured in plurality, and the plurality of positioning rods (231) are distributed around the second template (23).

8. The end cone forming die according to claim 6, characterized in that: A bottom plate (24) is provided on a side of the second mold base (2) away from the first mold base (1), and the bottom plate (24) is connected to the second mold plate (23) via a plurality of support plates (25) arranged at intervals.

9. The end cone forming die according to any one of claims 1 to 4, characterized in that: The second die base (2) comprises a pressure ring (22) arranged around the male die core (21).

10. The end cone forming die according to claim 9, characterized in that: The second mold base (2) further includes a push rod (26) for abutting the pressure ring (22) and a driving plate (27) for driving the push rod (26) to move. When the driving plate (27) moves toward the cavity (111), the push rod (26) abuts against the pressure ring (22) and moves toward the cavity (111).

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