A die for forming aluminum casing teeth

Abstract

This invention discloses an aluminum casing tooth extrusion forming mold, including an upper mold and a lower mold; the upper mold has a pressure block; the lower mold has a lower mold insert block and a driving block; the lower mold insert block has a cylindrical structure with a cavity; the driving block is movably mounted on the cavity of the lower mold insert block; the driving block has a dovetail structure; the lower mold also has a forming component; the forming component consists of multiple forming sliders surrounding the driving block; the outer surface of each forming slider is an arc surface with teeth; the arc surfaces of the multiple forming sliders cooperate to form a cylindrical surface; the pressure block presses down on the driving block, the driving block acts on the forming sliders, and the teeth of the forming sliders extrude teeth onto the inner wall of the aluminum casing fitted on the forming component. This invention can realize toothing within the mold, which can solve the technical problems of high product requirements and high product scrap rate in CNC machining processes, reduce the dimensional requirements of the preceding stamping process, save processing costs, and improve product stability and reliability.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to an aluminum sleeve extrusion tooth forming mold. Background Technology

[0002] With the development of the times, automobiles now need to meet not only traditional goals such as functionality, driving safety, strength, and durability, but also the demands for reduced weight, driving comfort, and noise reduction. The emergence of air suspension systems perfectly satisfies these requirements. Air springs are a crucial component of air suspension systems, enabling autonomous adjustment of suspension height and a smooth driving experience. Aluminum bushings, as an important part of air springs, need to possess advantages such as low cost, light weight, good corrosion and oxidation resistance, and excellent airtightness. Furthermore, to improve the airtightness of the assembly between the aluminum bushing and other components of the air spring (airbags, etc.), internal teeth need to be machined into the inner wall of the aluminum bushing.

[0003] In existing technologies, the internal teeth of aluminum casings are generally machined using CNC machining. Before CNC machining, a suitable fixture for the aluminum casing needs to be made. Aluminum casings are thin-walled parts produced by stamping. Machining stamped products has strict requirements on the radial dimensions of the stamped product. The stretching process can cause uneven material thickness and thinning, making it difficult to grip the workpiece firmly during machining. This poses a significant challenge to both stamping and machining. Furthermore, using CNC machining for the internal teeth of aluminum casings results in a high scrap rate, increases the unit cost of the product, and reduces its market competitiveness. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide an aluminum sleeve tooth extrusion forming die. This die can achieve in-die toothing, reducing the dimensional requirements of the preceding stamping process, saving processing costs, and improving product stability and reliability.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] An aluminum casing tooth extrusion forming die includes an upper die and a lower die; the upper die has a pressure block; the lower die has a lower die insert block and a driving block; the lower die insert block has a cylindrical structure with a cavity; the driving block is movably disposed on the cavity of the lower die insert block; the driving block has a dovetail structure; the lower die also has a forming component; the forming component is composed of multiple forming sliders surrounding the driving block; the outer surface of each forming slider is an arc surface with teeth; the arc surfaces of the multiple forming sliders cooperate to form a cylindrical surface; the pressure block presses down on the driving block, the driving block acts on the forming slider, and the teeth of the forming slider extrude teeth onto the inner wall of the aluminum casing sleeved on the forming component.

[0007] Furthermore, the upper mold includes an upper mold base assembly and a stripper plate; the upper mold base assembly includes an upper mold base, an upper pad plate, and an upper clamping plate arranged sequentially from top to bottom; the pressure block is fixed on the upper clamping plate; the upper mold base assembly is capable of moving up and down relative to the stripper plate; the stripper plate has a through hole for the pressure block to pass through downward.

[0008] Furthermore, the lower mold includes a lower mold base assembly and a floating material plate; the lower mold base assembly includes a lower mold base, a lower pad plate, and a lower template arranged sequentially from bottom to top; the lower mold insert block is installed on the lower template plate; the floating material plate is disposed above the lower mold base assembly and can move up and down relative to the lower mold base assembly.

[0009] Furthermore, a striking rod is installed on the stripping plate, which can act on the floating plate.

[0010] Furthermore, the drive block and the molding assembly are provided with a pressure cap, and a pressure rod is installed on the pressure cap. The pressure block in the upper mold acts on the drive block through the pressure rod.

[0011] Furthermore, the outer surface of the drive block has three dovetail protrusions and three dovetail grooves evenly distributed; the number of the forming sliders is 6, of which three forming sliders have dovetail mating grooves that mate with the dovetail protrusions of the drive block, and the other three forming sliders have dovetail mating protrusions that mate with the dovetail grooves of the drive block.

[0012] Furthermore, a lower die spring and an ejector plate located above the lower die spring are also installed in the lower die; a longitudinally penetrating ejector rod is installed in the lower die insert block; the lower die spring acts on the ejector plate, the ejector plate acts on the ejector rod, and the ejector rod acts on the drive block.

[0013] The beneficial effects of this invention are:

[0014] This invention enables tooth cutting within the mold, solving the technical problems of high product requirements and high scrap rate when using CNC machining to process product teeth. It can also reduce the dimensional requirements of the preceding stamping process, save processing costs, and improve product stability and reliability.

[0015] This invention achieves tooth extrusion through the cooperation of the pressure block, drive block and forming components inside the mold, which improves the processing stability of the product, reduces the debugging cost and processing cost of the mold, reduces the mold adjustment time, improves the dimensional accuracy of the product, enables mass production in a short time, saves a lot of costs, and improves the market competitiveness of the product. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the aluminum sleeve tooth extrusion forming mold (closed state) of the present invention.

[0017] Figure 2This is a top view of the aluminum sleeve extrusion tooth forming mold of the present invention when the mold is opened.

[0018] Figure 3 For along Figure 2 A cross-sectional view along line AA in the middle.

[0019] Figure 4 For along Figure 2 A cross-sectional view along the BB line.

[0020] Figure 5 This is a top view of the aluminum sleeve extrusion tooth forming mold of the present invention when the mold is closed.

[0021] Figure 6 For along Figure 5 A cross-sectional view of the FF line.

[0022] Figure 7 For along Figure 5 A cross-sectional view of the GG line.

[0023] Figure 8 This is a partial structural diagram of the aluminum sleeve extrusion tooth forming mold of the present invention.

[0024] Figure 9 for Figure 8 The diagram shows the exploded structure.

[0025] Figure 10 This is a schematic diagram of the drive block in the aluminum sleeve extrusion die of the present invention.

[0026] In the diagram, 1: Upper mold base; 2: Upper pad; 3: Upper clamping plate; 4: Stripper plate; 5: Pressure block; 6: Lower mold base; 7: Lower pad; 8: Lower template; 9: Floating plate; 10: Lower mold insert block; 101: Cavity; 11: Drive block; 1101: Dovetail groove; 1102: Dovetail protrusion; 12: Connecting shaft; 13: Forming slider; 1301: Tooth; 14: Pressure cap; 15: Pressure rod; 16: Lower mold spring; 17: Ejector plate; 18: Ejector rod; 19: Striking rod; 20: Aluminum sleeve. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] like Figures 1 to 9 A preferred embodiment of an aluminum sleeve extrusion die is shown, which includes an upper die and a lower die.

[0030] The upper mold includes an upper mold base assembly and a stripper plate. The upper mold base assembly includes an upper mold base 1, an upper pad 2, and an upper clamping plate 3 arranged sequentially from top to bottom. The upper mold base 1, upper pad 2, and upper clamping plate 3 are fixedly connected together. The stripper plate 4 is movably connected to the upper mold base 1 via a connector (such as an equal-height bolt, not shown in the figure) passing through the upper pad 2 and upper clamping plate 3. An upper mold spring (not shown in the figure) is also installed on the upper mold base 1, which passes through the upper pad 2 and upper clamping plate 3 and presses against the stripper plate 4. The upper mold base assembly can move up and down relative to the stripper plate 4. A pressure block 5 is provided in the upper mold. The pressure block 5 is fixed to the upper clamping plate 3. The stripper plate 4 has a through hole for the pressure block 5 to pass downward.

[0031] The lower mold includes a lower mold base assembly and a floating material plate 9 disposed above the lower mold base assembly. The lower mold base assembly includes a lower mold base 6, a lower pad plate 7, and a lower template 8, which are arranged sequentially from bottom to top and fixedly connected together. The lower mold also includes a lower mold insert block 10 and a driving block 11. The lower mold insert block 10 is connected to the lower template 8 via a fixed connector. The lower mold insert block 10 has a cylindrical structure with a cavity 101 at its upper part. The driving block 11 is movably disposed on the cavity 101 of the lower mold insert block 10. Specifically, a connecting shaft 12 is connected to the middle of the lower mold insert block 10 via a fixing screw; the connecting shaft 12 extends upward. The driving block 11 is fitted onto the connecting shaft 12 and can move up and down relative to the lower mold insert block 10 along the connecting shaft 12.

[0032] like Figure 10As shown, the drive block 11 has a dovetail-shaped structure that is wider at the top and narrower at the bottom. The outer surface of the drive block 11 has three evenly distributed dovetail protrusions 1101 and three dovetail grooves 1102. A forming assembly is also provided in the lower mold. This forming assembly consists of multiple forming sliders 13 surrounding the drive block 11. In this embodiment, there are six forming sliders 13, three of which have dovetail grooves that mate with the dovetail protrusions 1102 of the drive block 11, and the other three have dovetail protrusions that mate with the dovetail grooves 1101 of the drive block 11. The forming sliders 13 are assembled with the drive block 11 through the mating of the dovetail protrusions and dovetail grooves or the mating of the dovetail grooves and dovetail protrusions. The outer surface of each forming slider 13 is an arc surface with multiple rings of teeth 1301; the arc surfaces of the six forming sliders 13 mate to form a cylindrical surface. The drive block 11 and the molding assembly are also provided with a pressure cover 14; the middle part of the pressure cover 14 is connected to the upper end of the connecting shaft 12 by a fixing screw. Multiple pressure rods 15 that can move up and down are installed on the pressure cover 14, and the pressure block 5 in the upper mold acts on the drive block 11 through the pressure rods 15.

[0033] The aluminum sleeve 20 is fitted onto the cylindrical structure formed by the lower mold insert 10, the drive block 11, and the molding components.

[0034] The float plate 9 in the lower mold has a fitting hole in the middle, and the float plate 9 is fitted onto the lower mold insert block 10. A spring element (not shown in the figure) is provided between the float plate 9 and the lower mold plate 8; the float plate 9 can move up and down relative to the lower mold base assembly. The float plate 9 acts on the lower end of the aluminum casing 20 to push the aluminum casing 20 out during stripping. In addition, two striking rods 19 are installed on the stripping plate 4 in the upper mold, which can act on the float plate 9 to press the float plate 9 down during mold closing.

[0035] During molding, the pressure block 5 presses down on the driving block 11, the driving block 11 acts on the molding slider 13, and the teeth of the molding slider 13 squeeze the inner wall of the aluminum sleeve 20 sleeved on the molding component.

[0036] The lower mold also has a lower mold spring (nitrogen spring) 16 and an ejector plate 17 located above the lower mold spring; a longitudinally penetrating ejector rod 18 is installed in the lower mold inlet block 10; the lower mold spring 16 acts on the ejector plate 17, the ejector plate 17 acts on the ejector rod 18, and the ejector rod 18 acts on the drive block 11 so that the drive block 11 moves upward after molding.

[0037] At work, such as Figure 2 , Figure 3 and Figure 4As shown, the mold is in the open state. At this time, the aluminum casing 20 is fitted onto the cylindrical structure formed by the lower mold insert block 10, the drive block 11, and the forming components; the float plate 9 rests on the lower end of the aluminum casing 20. The upper mold moves downward, and the push rod 19 on the stripper plate 4 presses down on the float plate 9 until the float plate 9 abuts against the lower mold plate 8. At this time, the aluminum casing 20 moves into position, and the stripper plate 4 presses down on the upper end of the aluminum casing 20; the upper mold base 1, upper pad 2, upper clamping plate 3, and pressure block 5 in the upper mold continue to move downward; the pressure block 5 presses down on the pressure rod 15 on the pressure cover 14, and the pressure rod 15 presses down on the drive block 11; the drive block 11 causes the forming slider 13 to move radially outward, and the teeth 1301 on the forming slider 13 squeeze the inner wall of the aluminum casing 20. At this time, the mold is in the closed state, as shown. Figure 5 , Figure 6 and Figure 7 As shown. After the extrusion is completed, the upper die moves upward and the stripper plate 4 leaves the aluminum sleeve 20; the lower die spring 16 moves upward and lifts the ejector plate 17, the ejector plate 17 acts on the ejector rod 18, the ejector rod 18 lifts the drive block 11, the drive block 11 moves upward and resets, and the forming slider 13 moves radially inward and resets; at the same time, the floating plate 9 is lifted upward under the action of the elastic element, lifting the aluminum sleeve 20 to achieve stripping.

[0038] This invention enables tooth cutting within the mold, solving the technical problems of high product requirements and high scrap rate when using CNC machining to process product teeth. It can also reduce the dimensional requirements of the preceding stamping process, save processing costs, and improve product stability and reliability.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A die for forming teeth on an aluminum casing, characterized in that, The device includes an upper mold and a lower mold. The upper mold contains a pressure block. The lower mold contains a lower mold insert block and a driving block. The lower mold insert block is cylindrical and has a cavity. The driving block is movably mounted on the cavity of the lower mold insert block. The driving block has a dovetail shape. The outer surface of the driving block has evenly distributed dovetail protrusions and dovetail grooves. The lower mold also contains a forming assembly. This forming assembly consists of multiple forming sliders surrounding the driving block, each having dovetail grooves that mate with the dovetail protrusions of the driving block, and forming sliders having dovetail protrusions that mate with the dovetail grooves of the driving block. The outer surface of each forming slider is a toothed arc surface. The arc surfaces of the multiple forming sliders cooperate to form a cylindrical surface. The pressure block presses down on the driving block, and the driving block acts on the forming slider. The teeth of the forming slider extrude teeth against the inner wall of the aluminum sleeve fitted on the forming assembly. The upper mold includes an upper mold base assembly and a stripper plate; the upper mold base assembly includes an upper mold base, an upper pad plate, and an upper clamping plate arranged sequentially from top to bottom; the pressure block is fixed to the upper clamping plate; the upper mold base assembly is movable up and down relative to the stripper plate; the stripper plate has a through hole for the pressure block to pass through downward; The lower mold includes a lower mold base assembly and a floating material plate; the lower mold base assembly includes a lower mold base, a lower pad plate, and a lower template arranged sequentially from bottom to top; the lower mold insert block is installed on the lower template plate; the floating material plate is located above the lower mold base assembly and can move up and down relative to the lower mold base assembly; A striking rod is installed on the stripping plate, which can act on the floating plate; The drive block and the molding assembly are provided with a pressure cover, and a pressure rod is installed on the pressure cover. The pressure block in the upper mold acts on the drive block through the pressure rod.

2. The aluminum casing tooth extrusion forming mold according to claim 1, characterized in that, The outer surface of the drive block has three dovetail protrusions and three dovetail grooves evenly distributed; the number of the forming sliders is 6, of which three forming sliders have dovetail mating grooves that mate with the dovetail protrusions of the drive block, and the other three forming sliders have dovetail mating protrusions that mate with the dovetail grooves of the drive block.

3. The aluminum sleeve extrusion tooth forming mold according to claim 1, characterized in that, The lower die is also equipped with a lower die spring and an ejector plate located above the lower die spring; a longitudinally penetrating ejector rod is installed in the lower die insert block; the lower die spring acts on the ejector plate, the ejector plate acts on the ejector rod, and the ejector rod acts on the drive block.

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