Large-size aluminum alloy cold plate brazing tool
By using a tooling structure with segmented clamping and rolling friction, the deformation problem during the brazing process of large aluminum alloy cold plates was solved, enabling synchronous expansion of the aluminum alloy cold plates and reducing internal stress during the brazing process, thereby improving the stability and reliability of the products.
Patent Information
- Application Number
- CN202422673386.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-01
AI Technical Summary
In the existing brazing process of large aluminum alloy cold plates, there is a deformation problem. In particular, cold plates with a length of more than 1000mm are prone to wavy edges or surface collapse during the brazing process. This is mainly due to the difference in the coefficient of thermal expansion between the tooling fixture and the aluminum alloy.
The tooling structure is segmented and clamped. It uses aluminum alloy liners with the same coefficient of thermal expansion as the core, combined with rolling components and stainless steel pads. Rolling friction replaces sliding friction, reducing high-temperature expansion stress. The segmented pads have gaps to control deformation.
It effectively reduces the brazing deformation of large-size cold plates, ensures that the aluminum alloy cold plates expand synchronously during the brazing process, reduces internal stress, improves the stability and reliability of the product, and is suitable for mass production.
Smart Images
Figure CN223544293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger welding technology, and in particular to a brazing fixture for large-size aluminum alloy cold plates. Background Technology
[0002] Brazing of existing large aluminum alloy cold plates can cause deformation. Therefore, the size of aluminum alloy cold plates is generally no more than 1000mm. For aluminum alloy cold plates with a length of 1500mm or longer, the large difference between the tooling fixture and the coefficient of thermal expansion of the aluminum alloy can cause severe wavy edges or surface collapse. Utility Model Content
[0003] The purpose of this invention is to provide a brazing fixture for large-size aluminum alloy cold-rolled steel plates. This invention can significantly reduce brazing deformation of large-size cold-rolled steel plates.
[0004] The technical solution of this utility model is: a brazing fixture for large-size aluminum alloy cold plates, including a base plate, a pressure plate above the base plate, and an upper aluminum alloy liner and a lower aluminum alloy liner arranged parallel to each other in the vertical direction between the base plate and the pressure plate; one or more rolling components are arranged in the horizontal direction between the upper aluminum alloy liner and the pressure plate, and one or more rolling components are also arranged in the horizontal direction between the lower aluminum alloy liner and the base plate; the base plate and the pressure plate are connected by a tie rod.
[0005] In the aforementioned brazing fixture for large-size aluminum alloy cold plates, the rolling assembly includes a roller frame with a roller groove. Rollers are arranged in the roller groove and are used for support between the substrate and the lower aluminum alloy liner, and between the pressure plate and the upper aluminum alloy liner.
[0006] In the aforementioned brazing fixture for large-size aluminum alloy cold plates, a pad is provided between the roller and the corresponding upper and lower aluminum alloy liners.
[0007] In the aforementioned brazing fixture for large-size aluminum alloy cold plates, the tie rod is composed of a double-ended bolt and a nut.
[0008] In the aforementioned brazing fixture for large-size aluminum alloy cold plates, the backing plate is a stainless steel backing plate.
[0009] In the aforementioned brazing fixture for large-size aluminum alloy cold plates, the rolling assembly located between the pressure plate and the upper aluminum alloy liner is arranged in pairs with the rolling assembly located between the base plate and the lower aluminum alloy liner.
[0010] The advantages of this utility model are:
[0011] This utility model adopts a segmented clamping fixture structure, which does not hinder the expansion of the cold plate during the heating process and the contraction during the cooling process, and can greatly reduce the brazing deformation of large-sized cold plates.
[0012] The aluminum alloy cold plate brazing fixture of this utility model uses an aluminum alloy liner at the contact part with the cold plate assembly to be brazed. The liner has the same coefficient of thermal expansion as the core and can expand synchronously with the core.
[0013] This invention uses segmented pads pressed against the surface of an aluminum alloy liner. The segments are spaced apart, which is equivalent to dividing the long core into multiple short cores. The expansion difference between the two materials in each segment is reduced, which helps to control deformation.
[0014] This invention assembles a roller fixing frame on the outside of a stainless steel pad and assembles rollers inside the fixing frame, which transforms the sliding friction during expansion into rolling friction, reducing the expansion stress between the aluminum alloy core and the clamp caused by high-temperature expansion.
[0015] In summary, this invention features convenient disassembly, stable and reliable quality, low internal stress during brazing, and effectively reduces welding deformation of the cold-rolled plate. It can meet the needs of mass production of large-size aluminum alloy cold-rolled plates. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the aluminum alloy product to be processed according to this utility model;
[0017] Figure 2 This is the brazing tooling structure involved in this utility model;
[0018] Figure 3 yes Figure 2 Left view;
[0019] Figure 4 It is a 3D schematic diagram of the tooling used;
[0020] Figure 5 This is a sectional view of the tooling used;
[0021] Figure 6 This is a schematic diagram of the roller frame;
[0022] Figure 7 This is a schematic diagram of the rollers and roller frame after assembly. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0024] Example 1. A brazing fixture for large-size aluminum alloy cold-rolled steel plates, see [reference needed]. Figure 1 Cold-rolled steel plates are generally composed of an upper cover plate, a channel plate (or a similar channel plate structure composed of frame seals and corrugated fins), and a lower side plate, with brazing connecting the layers.
[0025] Product tooling assembly details Figure 2-7The system includes a substrate 1, a pressure plate 2 on top of the substrate 1, and an upper aluminum alloy liner 3 and a lower aluminum alloy liner 4 arranged vertically between the substrate 1 and the pressure plate 2. One or more rolling components 5 are arranged horizontally between the upper aluminum alloy liner 3 and the pressure plate 2, and one or more rolling components 5 are also arranged horizontally between the lower aluminum alloy liner 4 and the substrate 1. The substrate 1 and the pressure plate 2 are connected by a tie rod 6.
[0026] The aforementioned rolling assembly 5 includes a roller frame 5.1, on which a roller groove 5.2 is provided, and rollers 5.3 are arranged in the roller groove 5.2. The rollers 5.3 are used for support between the base plate 1 and the lower aluminum alloy liner 4, and between the pressure plate 2 and the upper aluminum alloy liner 3.
[0027] A pad 7 is provided between the aforementioned roller 5.3 and the corresponding upper and lower aluminum alloy liners.
[0028] The aforementioned tie rod 6 is composed of a double-ended bolt and a nut.
[0029] The aforementioned pad 7 is a stainless steel pad.
[0030] The rolling assembly 5 located between the pressure plate 2 and the upper aluminum alloy liner 3 is arranged in pairs with the rolling assembly 5 located between the base plate 1 and the lower aluminum alloy liner 4.
[0031] The assembly sequence is as follows:
[0032] On the worktable, a substrate 1 is placed, followed by three roller frames 5.1 (laid flat), and rollers 5.3 are assembled within the roller frames 5.1. Three pads 7 are then assembled within the rollers 5.3, and a lower aluminum alloy liner 4 is assembled. Next, the cold plate assembly to be brazed is assembled. An aluminum alloy liner 3 is then assembled onto the cold plate assembly, followed by the assembly of three pads 7. The three roller frames 5.1 (laid flat) are then placed, and rollers 5.3 are assembled within the roller frames 5.1. Finally, a pressure plate 2 is assembled. The fixture is then secured to the cold plate assembly to be brazed using a tie rod 6.
Claims
1. A brazing fixture for large-size aluminum alloy cold-rolled steel plates, characterized in that, The system includes a substrate (1), a pressure plate (2) is provided above the substrate (1), and an upper aluminum alloy liner (3) and a lower aluminum alloy liner (4) are arranged parallel to each other in the vertical direction between the substrate (1) and the pressure plate (2); one or more rolling components (5) are arranged in the horizontal direction between the upper aluminum alloy liner (3) and the pressure plate (2), and one or more rolling components (5) are also arranged in the horizontal direction between the lower aluminum alloy liner (4) and the substrate (1); the substrate (1) and the pressure plate (2) are connected by a tie rod (6).
2. The brazing fixture for large-size aluminum alloy cold-rolled plates according to claim 1, characterized in that, The rolling assembly (5) includes a roller frame (5.1), on which a roller groove (5.2) is provided, and rollers (5.3) are arranged in the roller groove (5.2). The rollers (5.3) are used for support between the substrate (1) and the lower aluminum alloy liner (4), and between the pressure plate (2) and the upper aluminum alloy liner (3).
3. The brazing fixture for large-size aluminum alloy cold-rolled plates according to claim 2, characterized in that, A pad (7) is provided between the roller (5.3) and the corresponding upper and lower aluminum alloy liners.
4. The brazing fixture for large-size aluminum alloy cold-rolled plates according to claim 1, characterized in that, The tie rod (6) is composed of a double-ended bolt and a nut.
5. The brazing fixture for large-size aluminum alloy cold-rolled plates according to claim 3, characterized in that, The pad (7) is a stainless steel pad.
6. The brazing fixture for large-size aluminum alloy cold-rolled plates according to claim 1, characterized in that, The rolling assembly (5) located between the pressure plate (2) and the upper aluminum alloy liner (3) is arranged in pairs with the rolling assembly (5) located between the base plate (1) and the lower aluminum alloy liner (4).