An extruded aluminum alloy high-precision fit structure

Abstract

An extruded aluminum alloy high-precision matching structure. One end of a second aluminum alloy block is inwardly recessed to form a female head, and one end of a first aluminum alloy block is outwardly protruding to form a male head, the male head includes two male head bodies, the inside between the two male head bodies is provided with a shaped inner groove, and the side edges of the outer ends of the two male head bodies are outwardly protruding to form fixing bosses. The utility model has the beneficial effects that: the structure is combined with the fixing boss and the shaped inner groove structure, effectively solves the problem that the aluminum alloy extruded profile is difficult to realize high-precision matching due to large tolerance fluctuation, and the structure can realize self-adaptive elastic matching within the design tolerance range of the male head and the female head, not only is high in assembly precision and reliable in result, but also makes the assembly operation extremely simple, can be completed only by ordinary thrust, significantly improves the assembly efficiency, at the same time, the structure is directly extruded into a shape, does not need subsequent numerical control processing, and also saves the auxiliary fixing links such as spot welding and end cover, and is more convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy equipment, and specifically to a structure for high-precision fitting of extruded aluminum alloys. Background Technology

[0002] With the continuous development of industrial technology, the functional and structural requirements for aluminum alloy extruded profiles are increasing, leading to larger and more complex profile structures. Against this backdrop, single-unit extrusion molding processes are often difficult to implement, typically requiring the overall structure to be broken down into multiple components, extruded separately, and then assembled.

[0003] However, during the extrusion process of aluminum alloy profiles, the forming temperature reaches as high as 550-580℃, followed by a quenching process to rapidly cool to below 100℃. In this physical process of thermal expansion and contraction, the dimensions of the profile undergo significant changes. Aluminum extrusion is characterized by uniform extrusion, which is accompanied by another characteristic: under constant extrusion speed, as the amount of raw material decreases, the pressure tends to decrease, leading to fluctuations in the dimensions of the extruded profile. Therefore, aluminum alloy extruded profiles objectively have an unavoidable dimensional tolerance range, which is typically several times or even ten times greater than that of CNC machining.

[0004] Currently, due to the limitations of the aforementioned material properties and processing characteristics, the tolerance fluctuation range of aluminum profiles cannot reach the precision level of CNC machining. Traditional assembly and fitting methods in the industry mainly fall into two categories, each with its own drawbacks: The pre-extrusion machining allowance method involves pre-extruding extra metal at the assembly location, followed by CNC machining to ensure fitting accuracy. The disadvantages of this method are: ① It increases the number of CNC machining steps, extending the product production cycle; ② The structure of the assembly location is usually complex and difficult to machine, leading to high CNC machining costs; Additionally, the pre-extrusion allowance increases the weight of the profiles purchased, significantly increasing the overall cost.

[0005] Clearance fit method: Designed directly based on the tolerance range of the aluminum alloy profile itself. To avoid assembly failure due to male head size exceeding female head size caused by tolerance fluctuations, traditional T-type or dovetail fit structures can only use a larger fit clearance. This design cannot achieve high-precision fit and can only serve a basic limiting function. To achieve reliable fixation, other auxiliary methods must be used, such as spot welding or end cap installation after assembly, increasing the complexity and cost of the process. (See [reference needed]). Figures 4-5 .

[0006] Therefore, there is an urgent need in this field for a new type of mating structure that can overcome the above-mentioned defects and achieve high-precision, high-efficiency, and low-cost assembly of aluminum alloy extruded profiles without the need for subsequent processing and auxiliary fixing. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings and defects of existing technologies by providing a high-precision fit structure for extruded aluminum alloys. This structure, through the combination of a fixed boss and a U-shaped inner groove, effectively solves the problem of difficulty in achieving high-precision fit in extruded aluminum alloy profiles due to large tolerance fluctuations. Moreover, this structure can achieve adaptive elastic fit within the design tolerance range of the male and female heads, resulting in high assembly accuracy and reliable results. It also makes the assembly operation extremely simple, requiring only ordinary thrust, which significantly improves assembly efficiency. In addition, this structure is directly extruded, eliminating the need for subsequent CNC machining and saving auxiliary fixing steps such as spot welding and end caps, making it more convenient and faster.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a high-precision fit structure for extruded aluminum alloy, comprising a first aluminum alloy block and a second aluminum alloy block, wherein one end of the second aluminum alloy block is recessed inward to form a female head, and one end of the first aluminum alloy block protrudes outward to form a male head, wherein the male head comprises a male head body, the middle part of the male head body is recessed inward to form a U-shaped inner groove, and the lower sides at both ends of the male head body protrude outward to form fixing bosses.

[0009] Furthermore, the male head and the first aluminum alloy block are an integrated structure.

[0010] Furthermore, the opening direction of the U-shaped inner groove is consistent with the length direction of the male head body.

[0011] Furthermore, the distance between the vertices of the two fixed bosses is L1, and the width between the inner walls of the female head is L2, wherein L1 ≥ L2.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This structure effectively solves the problem that aluminum alloy extruded profiles are difficult to achieve high-precision fit due to large tolerance fluctuations by combining the fixed boss and the inner groove. Moreover, this structure can achieve adaptive elastic fit within the design tolerance range of the male and female heads, which not only has high assembly accuracy and reliable results, but also makes the assembly operation extremely simple, requiring only ordinary thrust to complete, significantly improving assembly efficiency. At the same time, this structure is directly extruded and formed without the need for subsequent CNC machining, and also eliminates auxiliary fixing links such as spot welding and end caps, making it more convenient and faster. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 Enlarged structural diagram at point I.

[0016] Figure 3 This is a schematic diagram of the assembly effect of this utility model.

[0017] Figure 4 This is a schematic diagram of the existing technology.

[0018] Figure 5 yes Figure 4 Enlarged structural diagram at point II.

[0019] Explanation of reference numerals in the attached drawings: First aluminum alloy block A, Second aluminum alloy block B, Male head 1, Female head 2, U-shaped inner groove 1-1, Male head body 1-2, Fixing boss 1-3. Detailed Implementation

[0020] See Figures 1-3 As shown, the technical solution adopted in this specific embodiment is as follows: it includes a first aluminum alloy block A and a second aluminum alloy block B. One end of the second aluminum alloy block B is recessed inward to form a female head 2, and one end of the first aluminum alloy block A is protruding outward to form a male head 1. The male head 1 includes a male head body 1-2. The middle part of the male head body 1-2 is recessed inward to form a U-shaped inner groove 1-1, and the lower sides of both ends of the male head body 1-2 protrude outward to form a fixing boss 1-3.

[0021] To be more specific, the male connector 1 and the first aluminum alloy block A are an integral structure. Manufacturing with this integral structure ensures the overall strength between the first aluminum alloy block A and the male connector 1.

[0022] More specifically, the opening direction of the U-shaped inner groove 1-1 is consistent with the length direction of the male head body 1-2. This allows the male head body 1-2 to bend to a certain extent when it is bent.

[0023] More specifically, the distance between the vertices of the two fixed bosses 1-3 is L1, and the width between the inner walls of the female head 2 is L2, where L1 ≥ L2. The fixed bosses 1-3 reduce the contact area between the male head 1 and the female head 2, facilitating assembly. Furthermore, the fixed bosses 1-3, under the elasticity of the male head body 1-2, abut against the female head 2, thus ensuring the assembly stability between the male head 1 and the female head 2.

[0024] The working principle of this utility model is as follows: When assembling the first aluminum alloy block A and the second aluminum alloy block B, if the male head 1 is slightly larger than the female head 2 due to tolerance fluctuations (i.e., L1 > L2), the male head body 1-2, with its U-shaped inner groove 1-1 in the middle, possesses a certain elasticity, allowing for controllable micro-elastic deformation, thus effectively absorbing and compensating for dimensional deviations. Simultaneously, the fixed boss 1-3 reduces the contact area between the female head 2 and the male head 1, lowering the sliding friction resistance during assembly. Under the dual effects of elastic clearance and low friction, only a pushing force is needed for the male head 1 to smoothly slide into and reach the predetermined position. After assembly, the elastic restoring force of the male head body 1-2 continuously applies a uniform clamping force to the outer fixed boss 1-3, thereby eliminating the mating gap and achieving a stable, tight, high-precision fit without any subsequent processing or auxiliary fixing.

[0025] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A high-precision fit structure for extruded aluminum alloys, comprising a first aluminum alloy block (A) and a second aluminum alloy block (B), wherein one end of the second aluminum alloy block (B) is recessed inward to form a female head (2), characterized in that: One end of the first aluminum alloy block (A) protrudes outward to form a male head (1). The male head (1) includes a male head body (1-2). The middle part of the male head body (1-2) is recessed inward to form a U-shaped inner groove (1-1), and the lower sides of both ends of the male head body (1-2) protrude outward to form a fixing boss (1-3).

2. The structure for high-precision fitting of extruded aluminum alloy according to claim 1, characterized in that: The male head (1) and the first aluminum alloy block (A) are an integrated structure.

3. The structure for high-precision fitting of extruded aluminum alloy according to claim 1, characterized in that: The opening direction of the U-shaped inner groove (1-1) is consistent with the length direction of the male head body (1-2).

4. The structure for high-precision fitting of extruded aluminum alloy according to claim 1, characterized in that: The distance between the vertices of the two fixed bosses (1-3) is L1, and the width between the inner walls of the female head (2) is L2, wherein L1 ≥ L2.

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