Support for riveting aluminum die-cast cavity housing

Abstract

The utility model discloses a kind of support for riveting of aluminum die-casting cavity shell, including support body and operating end, support body is used to insert the aluminum die-casting cavity shell to be riveted into play supporting effect, operating end is used to realize the insertion and removal of support;Support body includes transverse connecting arm and respectively located vertical extension support arm at both ends of transverse connecting arm;In the riveting process before welding, support piece will rigid support and flexible adaptation be integrated into one body: support arm as direct force unit, support at the most fragile side of shell opening;Connecting arm then as core load-bearing framework, riveting force is evenly dispersed, to build a stable internal force flow transmission path, effectively resist the instantaneous high pressure brought by rivet needle impact, prevent the inflation or invagination of thin-walled shell.

Description

Technical Field

[0001] This utility model relates to the technical field of die casting processing, and in particular to a support component for riveting aluminum die-cast cavity shells. Background Technology

[0002] The die-cast aluminum cavity housing of the chip module serves as a support and protection structure for core electronic components. It typically consists of a one-piece frame body and cover plates on its front and back sides. An opening is provided on the side wall along the height direction of the body. This design facilitates the precise insertion of the chip module into the cavity, and after all internal connections are completed, a final hermetically sealed assembly is performed to ensure the long-term stable operation of the chip under complex working conditions.

[0003] To cope with the high heat generated during chip operation, the outer surface of the casing cover has undergone a special heat dissipation enhancement design, typically featuring an array of heat dissipation protrusions. These protrusions can be designed in different shapes, such as high-efficiency heat dissipation fins, robust ridges, or compact pillars, depending on specific heat dissipation requirements and space constraints, thereby significantly increasing the heat dissipation surface area and improving overall heat dissipation efficiency.

[0004] In the assembly process of the shell, the body and the cover plate are generally connected using friction welding technology. This process uses the heat generated by high-speed friction between components to plasticize the contact surface material and achieve metallurgical bonding under upsetting pressure, thereby forming a high-strength, high-sealing welded joint. However, the friction welding process itself generates significant shear force and vibration. To prevent the components from shifting or misaligning during welding, the inventors of this invention propose a riveting-before-welding process. Before formal welding, a riveting process is used to pre-position the components.

[0005] This pre-positioning step, however, brings new technical challenges: Because the cover plate is designed for lightweight and compactness, its wall thickness is often relatively thin. Under high riveting pressure, local stress can easily exceed the material's yield strength, leading to irreversible plastic deformation such as collapse and warping. This deformation not only directly affects the product's appearance quality and dimensional accuracy but also weakens the design effectiveness of the heat dissipation protrusions and may even create micro-gaps at the weld joint surface, ultimately posing a potential threat to the overall structural integrity of the housing, long-term sealing reliability, and thermal management performance. Therefore, how to avoid the deformation risk of the cover plate during the riveting process while ensuring effective positioning has become a critical issue that urgently needs optimization in this manufacturing process. Utility Model Content

[0006] This utility model provides a support for riveting aluminum die-cast hollow shells to address the problem of easy collapse or deformation of aluminum die-cast hollow shells during pre-welding riveting and positioning.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a support for riveting aluminum die-cast hollow shells, including a support body and an operating end. The support body is used to insert into the aluminum die-cast hollow shell to be riveted to provide support, and the operating end is used to realize the insertion and removal of the support.

[0008] The support includes a transverse connecting arm and vertically extending support arms located at both ends of the transverse connecting arm.

[0009] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the operating end includes a convex handle and a function part located on both sides of the convex handle.

[0010] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: the functional part is provided with a positioning function hole that extends into the connecting arm.

[0011] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the connecting arm is provided with a longitudinally penetrating auxiliary hole, and the channel of the auxiliary hole intersects perpendicularly with the channel of the positioning hole.

[0012] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problem is that the width of the support arm is less than half the width of the connecting arm.

[0013] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the convex shank is provided with an operating through hole, which facilitates the application of force to the tool or the installation of the fixture.

[0014] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the free end of the support arm is provided with an arc surface, and the arc surface extends from the outer side of the support arm to the front end surface.

[0015] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: a support for riveting aluminum die-cast hollow shells, including a support body and an operating end. The support body is used to insert into the aluminum die-cast hollow shell to be riveted to provide support, and the operating end is used to realize the insertion and removal of the support.

[0016] The support includes a transverse connecting arm and vertically extending support arms located at both ends of the transverse connecting arm.

[0017] The width of the support arm is less than half the width of the connecting arm;

[0018] The free end of the support arm has an arc surface that extends from the outer side of the support arm to the front end face.

[0019] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the operating end includes a convex handle and a function part located on both sides of the convex handle;

[0020] The functional part is provided with a positioning function hole that extends into the connecting arm;

[0021] The connecting arm is provided with a longitudinally penetrating auxiliary hole, the channel of which intersects perpendicularly with the channel of the positioning hole.

[0022] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the convex shank is provided with an operating through hole, which facilitates the application of force to the tool or the installation of the fixture.

[0023] Compared with existing technologies, the advantages of this utility model are: it integrates rigid support with flexible adaptation: the support arm, as a direct force-bearing unit, supports the most vulnerable side of the shell opening. The connecting arm, as the core load-bearing skeleton, evenly distributes the riveting pressure, thereby constructing a stable internal force flow transmission path, effectively resisting the instantaneous high pressure brought by the rivet impact, and preventing the thin-walled shell from bulging or sinking. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0025] Figure 1 A schematic diagram of a riveting machine used in the manufacture of aluminum die-cast hollow housings;

[0026] Figure 2 A schematic diagram of an aluminum die-cast hollow shell;

[0027] Figure 3 Schematic diagram of a support component for riveting a die-cast aluminum cavity shell. Figure 1 ;

[0028] Figure 4 Schematic diagram of a support component for riveting a die-cast aluminum cavity shell. Figure 2 ;

[0029] Figure 5 This is an assembly drawing of the support components and the housing for riveting aluminum die-cast hollow housing. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the die-cast part of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model.

[0033] like Figure 1-2 As shown, to ensure quality during the welding process, engineers add a riveting pre-fixing process before welding, riveting the cover plate 22 of the aluminum die-cast cavity shell 200 to the body 21 together using a riveting machine 300 to prevent displacement during friction welding and thus prevent defects. However, because the components need to withstand large riveting pressure during riveting, and the cover itself is usually a thin-walled structure, it is prone to collapse or deformation, leading to changes in the riveting position and ultimately affecting the dimensional accuracy of the entire shell. This may eventually lead to assembly failure of the internal precision chip module or a decrease in heat dissipation performance. To address this, this embodiment provides a support member 100 for riveting the aluminum die-cast cavity shell, which provides precise and reliable internal auxiliary support during the riveting operation, thereby improving the manufacturing yield and structural integrity of the shell.

[0034] like Figure 3-4 As shown, the support 100 for riveting an aluminum die-cast hollow shell includes a support body 10 and an operating end 20. The support body 10 is inserted into the aluminum die-cast hollow shell 200 to be riveted, providing support. The operating end 20 is used to insert and remove the support 100. The support body 10 includes a transverse connecting arm 1 and vertically extending support arms 2 located at both ends of the transverse connecting arm 1, forming a U-shaped structure. This overall configuration creatively integrates rigid support with flexible adaptation: the support arm 2, as a direct force-bearing unit, supports the most vulnerable side of the shell opening. The connecting arm 1, as the core load-bearing skeleton, evenly distributes the riveting pressure, thereby constructing a stable internal force flow transmission path, effectively resisting the instantaneous high pressure brought by the rivet impact, and preventing the thin-walled shell from bulging or sinking.

[0035] During riveting, the support member 100 is inserted into the body 21, and the clamping member laterally holds the support member 100. The body 21 has two cover plates 22 on either side that need to be riveted. Then, the riveting machine is started, and the upper and lower pressure plates of the machine close in place. The rivet pins inside the machine simultaneously act on the upper and lower cover plates 22 and the body 21, riveting around the inner side of the weld bead. After riveting is completed, the support member 100 is removed, and friction welding is then performed around the weld bead to complete the final fabrication.

[0036] The intervention of this support member 100 transforms the concentrated riveting pressure originally borne solely by the shell into a uniformly distributed load shared by the shell and the support member 100, greatly improving the stress state of the shell. This not only eliminates visible indentation deformation but also avoids the accumulation of microscopic damage within the material, providing an ideal substrate with precise geometric dimensions and low internal stress for subsequent welding.

[0037] The inner cavity of the die-cast aluminum hollow shell is a cavity with the same width as the lateral opening. Therefore, in this embodiment, the support arms 2 are placed on both sides to maximize support while also allowing for a certain degree of width adjustment, preventing the support member 100 from not fitting into the body 21. The connecting arm 1 not only ensures overall rigidity but also provides support to one side of the shell during riveting.

[0038] like Figure 3-5 As shown, the width of the support arm 2 is less than half the width of the connecting arm 1. This differentiated width design produces several beneficial effects: First, the narrower support arm 2 has appropriate flexibility, which can compensate for the slight dimensional fluctuations in the housing cavity caused by casting tolerances, ensuring that the support 100 can be smoothly inserted and fully contact the inner wall, avoiding assembly difficulties or scratches to the inner wall caused by over-positioning; Second, the wide connecting arm 1 ensures that the overall structure does not bend or deform under pressure, maintaining the stability of the support stiffness; Third, this strong trunk and weak branch mechanical design makes the stress more concentrated on the high-strength connecting arm 1, thereby protecting the relatively weak root of the support arm 2 and extending the fatigue life of the support 100.

[0039] like Figure 3-5As shown, the four corners of the aluminum die-cast cavity shell at the welding position are all rounded. Preferably, in this embodiment, instead of multiple rivet points on each rounded corner, only one rivet point is set at the midpoint of the arc that best balances the force on the rounded corner. It should be understood that the rounded corners of a rectangular shell are areas where stress and deformation are most likely to concentrate. If multiple or improperly positioned rivet points are set on the rounded corners, new sources of stress concentration may be introduced. Precisely setting the rivet point at the midpoint of the arc is equivalent to applying a constraint on the axis of symmetry of the rounded corner. This position can most effectively balance the stress from the two adjacent right-angled sides, allowing the constraint force to be evenly transmitted, thereby maximizing the suppression of torsional deformation of the rounded corner during the welding process. This one-point-to-center strategy achieves optimal rounded corner stability control with the fewest rivet points.

[0040] For the rounded corner, the free end of the support arm 2 has an arc surface 3, which extends from the outer side of the support arm 2 to the front end. The design of the arc surface 3 ensures that after the support member 100 is inserted into place, the arc surface 3 can closely fit and penetrate deep into the entire inner wall surface of the rounded corner area, especially located directly behind the rivet point at the midpoint of the arc. When the rivet impacts the midpoint of the rounded corner, the huge instantaneous pressure will force the thin-walled rounded corner to collapse inward. At this time, the arc surface 3 of the support arm 2, located directly behind it, provides a contour-matched rigid back support, effectively resisting the impact force. This ensures that the rivet point can complete plastic deformation at the preset position, forming a reliable connection, without causing the rivet to be loose or the position to drift due to the collapse of the base material. The surface contact support of the arc transition surface rapidly diffuses the concentrated stress applied by the rivet point backward through the support arm 2 to the connecting arm 1 and the entire support structure. This avoids the stress being limited to a small area directly below the rivet point, preventing indentations or micro-cracks from forming on the inner wall of the rounded corner due to excessive pressure. This transforms the rounded corner area from a vulnerable weak point into a reinforced area that is firmly supported when subjected to riveting pressure.

[0041] Preferably, such as Figure 3-4 As shown, the operating end 20 includes a protruding shank 4 located in the middle. The width of the protruding shank 4 is smaller than the width of the connecting arm 1, thereby forming an action part 5 on both sides of the protruding shank 4. This action part 5 is used to cooperate with the pressing member so that during the riveting process, the support member 100 is always located inside the body 21, ensuring that the supporting force is uniform and stable.

[0042] like Figure 3-5 As shown, preferably, the working parts 5 are symmetrically arranged on both sides of the convex handle 4. This symmetrical design ensures that when the holding force is applied to the working parts 5 on both sides, the force system is in a balanced state, avoiding tilting or twisting of the support member 100 in the cavity, and ensuring the symmetry and uniformity of the support force distribution.

[0043] like Figure 3As shown, more preferably, the working part 5 is provided with a positioning hole 6 extending into the connecting arm 1. The positioning hole 6 plays a guiding and positioning role for the pressing member. The pressing member acts on the support member 100 through the positioning hole 6. This not only provides pressing along the central axis of the hole, but also provides lateral limiting, preventing the support member 100 from moving laterally and further improving the stability of the support member 100.

[0044] like Figure 3 As shown, the connecting arm 1 is provided with a longitudinally penetrating auxiliary hole 7, the channel of the auxiliary hole 7 intersecting perpendicularly with the channel of the positioning hole 6. The auxiliary hole 7 is provided not only to avoid the support member 100 from warping or arching due to dimensional changes caused by thermal expansion and contraction, but also to facilitate the release of the clamping member from the positioning hole 6, thus preventing it from being stretched and stuck.

[0045] More preferably, such as Figure 3-5 As shown, the shank 4 is provided with an operating through hole 8, which facilitates the application of force to the tool or the installation of fixtures. For example, the operating through hole 8 provides a standardized tool interface, allowing the use of simple hook tools or automated robotic arms for picking and placing, laying the foundation for the full automation of the production line and avoiding oil contamination or improper force application caused by manual operation.

[0046] The above description provides a support member 100 for riveting an aluminum die-cast hollow shell. The above description of the embodiments is only for the purpose of helping to understand the present invention and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A support component for riveting a die-cast aluminum cavity shell, characterized in that: It includes a support body and an operating end. The support body is used to insert into the aluminum die-cast cavity housing to be riveted and provide support. The operating end is used to realize the insertion and removal of the support body. The support includes a transverse connecting arm and vertically extending support arms located at both ends of the transverse connecting arm.

2. The support member for riveting aluminum die-cast hollow shell according to claim 1, characterized in that: The operating end includes a convex handle and actuating parts located on both sides of the convex handle.

3. The support member for riveting aluminum die-cast hollow shell according to claim 2, characterized in that: The functional part is provided with a positioning function hole that extends into the connecting arm.

4. The support member for riveting aluminum die-cast hollow shell according to claim 3, characterized in that: The connecting arm is provided with a longitudinally penetrating auxiliary hole, the channel of which intersects perpendicularly with the channel of the positioning hole.

5. The support member for riveting aluminum die-cast hollow shell according to claim 1, characterized in that: The width of the support arm is less than half the width of the connecting arm.

6. The support member for riveting aluminum die-cast hollow shell according to claim 2, characterized in that: The shank is provided with an operating through hole, which facilitates the application of force to the tool or the installation of fixtures.

7. The support member for riveting aluminum die-cast hollow shell according to claim 1, characterized in that: The free end of the support arm has an arc surface that extends from the outer side of the support arm to the front end face.

8. A support component for riveting a die-cast aluminum cavity shell, characterized in that: It includes a support body and an operating end. The support body is used to insert into the aluminum die-cast cavity housing to be riveted and provide support. The operating end is used to realize the insertion and removal of the support body. The support includes a transverse connecting arm and vertically extending support arms located at both ends of the transverse connecting arm. The width of the support arm is less than half the width of the connecting arm; The free end of the support arm has an arc surface that extends from the outer side of the support arm to the front end face.

9. The support member for riveting aluminum die-cast hollow shell according to claim 8, characterized in that: The operating end includes a convex handle and a function part located on both sides of the convex handle; The functional part is provided with a positioning function hole that extends into the connecting arm; The connecting arm is provided with a longitudinally penetrating auxiliary hole, the channel of which intersects perpendicularly with the channel of the positioning hole.

10. The support member for riveting aluminum die-cast hollow shell according to claim 9, characterized in that: The shank is provided with an operating through hole, which facilitates the application of force to the tool or the installation of fixtures.

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