High-precision copper soft connection for multi-point cold conduction and processing method thereof

Abstract

The application discloses a kind of multi-point position cold conduction with high-precision copper soft connection and its processing mode, copper soft connection includes flexible layer, flexible layer includes multiple layers stacked dependence, copper foil is connected by welding, flexible layer is divided into square matrix arrangement, four piece areas are connected in central region, and the upper and lower surfaces of central region are welded with first copper block by high molecular diffusion, first copper block constitutes cold source contact area, the upper and lower surfaces of the edge position of two adjacent edges of four piece areas are welded with second copper block by high molecular diffusion, second copper block constitutes cold installation area, the upper and lower surfaces of each piece area corresponding to the four corners of the flexible layer are welded with third copper block by high molecular diffusion, third copper block constitutes the fixed installation area of copper soft connection;The processing mode of copper soft connection uses the upper and lower cover plates with two depth grooves to prevent copper foil from thermal deformation by using pad layer.The product structure of the application is compact, high precision, effectively avoids the irregularity and thermal deformation phenomenon of the flexible part of product.

Description

Technical Field

[0001] This invention relates to an improved invention of copper flexible connectors for the superconducting industry, and more particularly to an improved invention of a high-precision copper flexible connector for multi-point cooling. Background Technology

[0002] With the development of the superconducting industry, the demand for various superconducting thermal conductivity products is gradually increasing, and the product requirements are becoming more refined. For example, there is a need for connections between densely packed devices that require cold air distribution. However, existing products have complex structures and low precision, leading to assembly difficulties. At the same time, irregularities and thermal deformation of the flexible parts of flexible connection products are prone to occur. This is because copper foil flexible connections generally use polymer diffusion welding technology. Under high temperature and high pressure, copper foil will deform due to heat, which is especially noticeable when the area of ​​the soft region is small. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a high-precision copper flexible connector for multi-point heat conduction with compact structure and high precision and its processing method for preventing thermal deformation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This high-precision copper flexible connector for multi-point cooling includes a flexible layer, characterized in that: the flexible layer includes multiple layers of copper foil stacked and connected by polymer diffusion welding; the flexible layer is divided into four areas arranged in a square array and connected in the central region; a first copper block is polymer diffusion welded to the upper and lower surfaces of the central region, the first copper block forming a cold source contact area; a second copper block is polymer diffusion welded to the upper and lower surfaces of the adjacent edges of the four areas; the second copper block has threaded mounting holes and forms a cold-receiving mounting area; a third copper block is polymer diffusion welded to the upper and lower surfaces of each area corresponding to the four corners of the flexible layer; the third copper block has threaded mounting holes and forms a fixed mounting area for the copper flexible connector; the first copper block, the second copper block, and the third copper block are all protruding island-like structures on the flexible layer.

[0005] Preferably, the flexible layer has clearance grooves at its four corners and near the center for wire harness installation.

[0006] Preferably, the copper foil and each copper block are made of TU1, T2 or TU2.

[0007] Preferably, the flatness of the first copper block, the second copper block, and the third copper block is less than 0.05 mm.

[0008] Preferably, the second copper block has four threaded mounting holes.

[0009] Preferably, the third copper block has three threaded mounting holes.

[0010] The processing method for this type of copper flexible connector is characterized by including the following processing steps:

[0011] 1) First, use CNC to machine the upper and lower cover plates. Design grooves of two depths on the upper and lower cover plates. The shallower groove is used to match the filling of a high-temperature resistant non-metallic material pad, which matches the flexible area of ​​the corresponding copper foil; the deeper groove is set around the shallower groove.

[0012] 2) Two high-temperature resistant non-metallic material pads are processed with high precision and matched to the flexible areas on the upper and lower surfaces of the corresponding copper foil.

[0013] 3) The copper foil is cut into one piece and stacked in layers according to requirements;

[0014] 4) Assemble the stacked copper foil, upper and lower cover plates, and padding layers together;

[0015] 5) The products are welded together using polymer diffusion welding technology;

[0016] 6) Use CNC machining to remove excess material and machine the flatness of the installation area;

[0017] 7) Using slow wire EDM process, the flexible area and hardened area are separated. Specifically, the cover plate is thinned to the deeper groove position, causing the shallower groove to fall off, and the fallen part is cleaned with the pad layer.

[0018] Preferably, the high-temperature resistant non-metallic material pad is a graphite pad.

[0019] The beneficial effects of this invention are that the improved high-precision copper flexible connector for multi-point cooling can realize the function of supplying cooling to multiple devices around it from one cold source, and effectively absorb slight vibrations of different frequencies in each installation area. The product is suitable for connecting dense devices that require the distribution of cooling capacity. The product has a compact structure and high precision. At the same time, the improved processing method of the copper flexible connector effectively avoids irregularity and thermal deformation of the flexible part of the flexible connector product. Attached Figure Description

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the copper flexible connector of the present invention.

[0022] Figure 2 This is a top view of the copper flexible connector structure of the present invention.

[0023] Figure 3 This is an exploded view of the copper flexible connection processing structure of the present invention.

[0024] Figure 4 For the present invention Figure 3 A magnified view of part A. Detailed Implementation

[0025] The accompanying drawings illustrate the structure of the present invention, and further details will be described below in conjunction with the drawings. In this embodiment, see the attached drawings. Figure 1-2 This multi-point cooling high-precision copper flexible connector includes a flexible layer 1, which comprises multiple layers of stacked and interdependent copper foils connected by polymer diffusion welding. The flexible layer 1 is divided into four areas 2 arranged in a square array and connected in the central region. The upper and lower surfaces of the central region are polymer diffusion welded with first copper blocks 3, which constitute the cold source contact area. The upper and lower surfaces of the adjacent edges of the four areas 2 are polymer diffusion welded with second copper blocks 4, which have threaded mounting holes and constitute the cooling installation area. The upper and lower surfaces of the four corner areas 2 of the flexible layer 1 are polymer diffusion welded with third copper blocks 5, which have threaded mounting holes and constitute the fixed installation area of ​​the copper flexible connector. The first copper blocks 3, second copper blocks 4, and third copper blocks 5 are all protruding island structures on the flexible layer 1, that is, isolated from each other and connected by the flexible layer 1, which leaves space for the movement of the flexible layer 1 and also helps to ensure the overall flatness of the product.

[0026] The working principle of this invention is to fix the copper flexible connection to the cold source through the third copper block 5 and fasteners, and to make the cold source contact area of ​​the first copper block 3 contact the cold source. Multiple devices to be cooled are connected through the second copper block 4 and fasteners, so as to realize the function of one cold source to supply cooling to multiple devices around it. Under the action of the flexible layer 1, the slight vibrations of different frequencies in each installation area are effectively absorbed.

[0027] As a further improved specific implementation, the flexible layer 1 is provided with clearance grooves 6 at the four corners and near the center area for wire harness installation.

[0028] As a further improved specific implementation, the copper foil and each copper block are made of TU1, T2 or TU2.

[0029] As a further improved implementation, the flatness of the first copper block 3, the second copper block 4, and the third copper block 5 is less than 0.05 mm, thereby improving the contact fit.

[0030] As a further improved embodiment, the second copper block 4 has four threaded mounting holes, which are evenly distributed on the four corners of the second copper block 4.

[0031] As a further improved specific implementation, the third copper block 5 has 3 threaded mounting holes, which are evenly distributed along the shape of the third copper block 5.

[0032] See appendix Figure 3-4 The processing method for this copper flexible connector includes the following processing steps:

[0033] 1) First, use CNC to machine the upper cover plate 7 and the lower cover plate 8. Design grooves of two depths on the upper and lower cover plates 7 and 8. The shallower groove 11 is used to match the filling of the high-temperature resistant non-metallic material pad 10, which matches the flexible area of ​​the corresponding copper foil; the deeper groove 9 is set around the shallower groove 11.

[0034] 2) Two high-temperature resistant non-metallic material pads 10 are processed with high precision and matched with the flexible areas of the upper and lower surfaces of the corresponding copper foil, and the thickness of the pads 10 depends on the thickness of the product.

[0035] 3) The copper foil is cut into one piece and stacked in layers according to requirements;

[0036] 4) Assemble the stacked copper foil, upper and lower cover plates 7 and 8, and padding layer 10 together;

[0037] 5) The products are welded together using polymer diffusion welding technology;

[0038] 6) Use CNC machining to remove excess material and machine the flatness of the installation area;

[0039] 7) Using a slow wire EDM process, the flexible area and the hardened area are separated. Specifically, the cover plate is thinned to the deeper groove 9, causing the shallower groove 11 to detach. The detached part is then cleaned along with the pad layer 10. The non-groove portion of the cover plate forms the hardened area of ​​the copper foil, which constitutes the first copper block 3, the second copper block 4, and the third copper block 5.

[0040] As a further improved embodiment, the high-temperature resistant non-metallic material pad 10 is a graphite pad used to protect the flexible area of ​​the copper foil and prevent thermal deformation.

[0041] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision copper flexible connector for multi-point cooling, including a flexible layer, characterized in that: The flexible layer includes multiple stacked copper foils connected by polymer diffusion welding. The flexible layer is divided into four areas arranged in a square array and connected in the central region. A first copper block is polymer diffusion welded to the upper and lower surfaces of the central region. The first copper block constitutes a cold source contact area. A second copper block is polymer diffusion welded to the upper and lower surfaces of the adjacent edges of the four areas. The second copper block has threaded mounting holes and constitutes a cold mounting area. A third copper block is polymer diffusion welded to the upper and lower surfaces of the four corner areas of the flexible layer. The third copper block has threaded mounting holes and constitutes a fixed mounting area for the copper flexible connection. The first copper block, the second copper block, and the third copper block are all protruding island-like structures on the flexible layer. The processing method for the copper flexible connector includes the following processing steps: 1) First, use CNC to machine the upper and lower cover plates. Design grooves of two depths on the upper and lower cover plates. The shallower groove is used to match the filling of a high-temperature resistant non-metallic material pad, which matches the flexible area of ​​the corresponding copper foil; the deeper groove is set around the shallower groove. 2) Two high-temperature resistant non-metallic material pads are processed with high precision and matched to the flexible areas on the upper and lower surfaces of the corresponding copper foil. 3) The copper foil is cut into one piece and stacked in layers according to requirements; 4) Assemble the stacked copper foil, upper and lower cover plates, and padding layers together; 5) The products are welded together using polymer diffusion welding technology; 6) Use CNC machining to remove excess material and machine the flatness of the installation area; 7) Using slow wire EDM process, the flexible area and hardened area are separated. Specifically, the cover plate is thinned to the deeper groove position, causing the shallower groove to fall off, and the fallen part is cleaned with the pad layer.

2. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The flexible layer has clearance slots at its four corners and near the center for wire harness installation.

3. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The copper foil and each copper block are made of TU1, T2 or TU2.

4. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The flatness of the first copper block, the second copper block, and the third copper block is less than 0.05 mm.

5. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The second copper block has four threaded mounting holes.

6. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The third copper block has three threaded mounting holes.

7. The high-precision copper flexible connector for multi-point cooling as described in claim 1, characterized in that: The high-temperature resistant non-metallic material pad is a graphite pad.

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