Cooling plate, cold plate molded product, cold plate raw material, and defective raw material recycling method

Abstract

The present application relates to the field of electronic components, in particular to a cooling plate, a cold plate forming product, a cold plate raw material and a defective product raw material recycling method. The cold plate forming product comprises a substrate and a plurality of protrusions formed on the surface of the substrate. The substrate has opposite welding surfaces and needle surfaces, the welding surface of the substrate is configured as a copper surface, the needle surface of the substrate has a high-conductivity area and at least one lightweight area, the lightweight area is configured as a strip shape, and the two ends extend to the opposite two side edges of the needle surface respectively, each lightweight area is completely separated from each other, the material of the lightweight area is aluminum, and the material of the high-conductivity area is copper. The heat dissipation needles are all formed on the needle surface of the substrate, and at least part of the heat dissipation needles are formed on the high-conductivity area of the substrate. The copper and aluminum materials are concentratedly distributed, which facilitates the raw material recycling of defective products and reduces the production cost.

Description

Technical Field

[0001] This invention relates to the field of electronic components, and in particular to a method for recycling cooling plates, cold plate molded products, cold plate raw materials, and defective raw materials. Background Technology

[0002] Liquid cooling plates with copper pin arrays can significantly increase the internal heat exchange contact area and are widely used in heat dissipation scenarios for high-power heat-generating devices such as server computing chips, energy storage converters, new energy vehicle electronic control systems, photovoltaic inverters, and high-power lasers. However, due to the high cost of copper and the varying heat dissipation requirements of different components, traditional liquid cooling plates made from copper have excessive heat dissipation capacity and are too costly to manufacture. Some manufacturers use thinner aluminum to encase copper plates to create composite materials, and then use these composite materials to manufacture liquid cooling plates. This reduces raw material costs by sacrificing excess heat dissipation capacity and achieves weight reduction. Furthermore, the dense oxide film formed on the surface of aluminum eliminates the need for surface treatment after forging, helping to reduce production costs and shorten production time.

[0003] However, during the process of forming raised copper needles on the surface of the raw material through forging, the defect rate is relatively high due to factors such as stress distribution. Since the recycling of composite materials requires sorting and purification processes, which are costly and yield recycled materials with low purity (essentially covering the material cost), defective cold-formed copper-aluminum composite products are typically not recycled. This leads to resource waste and increased overall costs. Summary of the Invention

[0004] The purpose of this invention is to provide a method for recycling cooling plates, cold-rolled plate molded products, cold-rolled plate raw materials, and defective raw materials with low recycling costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A cold-formed sheet metal article includes a substrate and a plurality of heat dissipation pins protruding from the surface of the substrate. The substrate has opposing welding surfaces and pin surfaces. The welding surfaces of the substrate are made of copper. The pin surfaces of the substrate have a high conductivity region and at least one lightweight region. The lightweight region is elongated and extends to opposite sides of the pin surface at both ends. The lightweight regions are completely separated from each other. The lightweight region is made of aluminum, and the high conductivity region is made of copper. The heat dissipation pins are all formed on the pin surfaces of the substrate, and at least some of the heat dissipation pins are formed on the high conductivity region of the substrate.

[0006] Optionally, the plurality of lightweight regions extend along a first direction, and the two sides of the needle surface along a second direction are respectively located within two lightweight regions, wherein the first direction and the second direction are perpendicular to each other.

[0007] Optionally, some of the heat dissipation pins are formed in the lightweight region and are made of aluminum, while some of the heat dissipation pins are formed in the high conductivity region and are made of copper. The area ratio of the lightweight region within the pin surface is any value less than or equal to 70%.

[0008] Optionally, the multiple heat dissipation pins are arranged in multiple rows that are all parallel to the first direction, and the two rows of heat dissipation pins closest to the two sides of the pin surface in the second direction are respectively formed in the two high conductivity regions.

[0009] Optionally, an interface region is formed at the junction of adjacent high-conductivity regions and lightweight regions on the needle surface, and each of the heat dissipation needles is separated from the interface region.

[0010] Secondly, the present invention also provides a method for recycling defective raw materials, comprising: Obtain defective products from the aforementioned cold-rolled sheet metal products; The defective product is cut along a cross-section parallel to the substrate, and the solder surface of the defective product is separated to obtain a copper sheet made of metallic copper and a cut product. The cut product is cut along longitudinal sections perpendicular to the substrate and parallel to the extension direction of the lightweight region, each longitudinal section corresponding to a position adjacent to the edge within the high-conductivity region, and each of the high-conductivity regions corresponding to at least two of the longitudinal sections, to obtain a copper block constructed of metallic copper, and a composite product.

[0011] Optionally, the longitudinal sections corresponding to each of the high-conductivity regions of the cut product are arranged in sequence as a first longitudinal section, a second longitudinal section, a third longitudinal section, and a fourth longitudinal section. The copper block is obtained by cutting along the second longitudinal section and the third longitudinal section, a sorting block is obtained by cutting along the first longitudinal section and the second longitudinal section, and another sorting block is obtained by cutting along the third longitudinal section and the fourth longitudinal section. The main material of the sorting block is metallic copper.

[0012] Optionally, the cross-section includes a first cross-section and a second cross-section that are parallel to each other. The second cross-section is located on the side of the first cross-section away from the welding surface of the defective product. The copper sheet is obtained by cutting along the first cross-section, and a sorting plate is obtained by cutting along the first cross-section and the second cross-section. The main material of the sorting plate is metallic copper.

[0013] Thirdly, the present invention also provides a cold-rolled steel sheet raw material for forging to form the aforementioned cold-rolled steel sheet product. The cold-rolled steel sheet raw material includes a copper plate and an aluminum strip. The copper plate has a first side and a second side facing each other. Multiple perforated grooves are formed on the surface of the first side, and the perforated grooves penetrate the opposite two edges of the copper plate. The aluminum strip has an exposed surface, an embedded surface facing the exposed surface, and two connecting surfaces connecting the exposed surface and the embedded surface. The shapes of the multiple aluminum strips are respectively matched with each of the perforated grooves and are fitted into the perforated grooves. The exposed surface of the aluminum strip is flush with the first side of the copper plate. The embedded surface and the connecting surface of the aluminum strip are connected to the inner wall of the perforated groove and form a transition zone at the interface.

[0014] Optionally, the inner surfaces of each aluminum strip are flush with each other, and the width of the inner surface is less than or equal to the width of the exposed surface.

[0015] Optionally, taking the thickness direction of the cold plate material as the third direction, the angle between the line connecting the same side edge of the inlaid surface and the exposed surface of each aluminum strip and the third direction member is any value less than or equal to 15 degrees.

[0016] Optionally, the connecting surface of the aluminum strip includes a vertical surface and / or an arc surface, the vertical surface being perpendicular to the embedded surface and the exposed surface, and the vertical surface being directly connected to the embedded surface, the arc surface being arc-shaped and curved toward the inside of the aluminum strip, and the arc surface being directly connected to the exposed surface.

[0017] Fourthly, the present invention also provides a cooling plate, which is obtained by surface treatment of the needle surface and the heat dissipation needle surface of the above-mentioned cold plate molded article.

[0018] The beneficial effects of this invention are as follows: the entire welding surface of the substrate is made of copper, facilitating the welding of components. Since the welding surface is entirely constructed of copper, a copper plate with a certain thickness and high purity can be obtained through simple layer cutting. Because the lightweight aluminum region and the high-conductivity copper region are alternately arranged, a large amount of copper can be obtained through simple longitudinal cutting. Simultaneous layer cutting and longitudinal cutting separate the high-purity copper and the composite material containing a large amount of aluminum at a lower cost, reducing the cost of copper recycling and thus lowering the overall material cost of production. Since the lightweight region penetrates the pin surface, the thickness of the aluminum layer corresponding to the lightweight region can be observed from the side of the cold-formed product, ensuring that the cut copper does not contain excessive aluminum. Furthermore, the lightweight region penetrating the pin surface eliminates the need for aluminum to be composited with copper at the end face, reducing the composite area, lowering composite costs, and facilitating mass production.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the cold-rolled steel plate material shown in Embodiment 1 of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a top view of the cold-rolled sheet metal product according to Embodiment 1 of the present invention. Figure 4 This is a side view of the cold-rolled sheet metal product according to Embodiment 1 of the present invention. Figure 5 This is a flowchart of the defective raw material recycling method shown in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the material obtained after cutting defective products, as shown in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the structure of the cold-rolled sheet metal product shown in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the structure of the cold-rolled steel plate material shown in Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the structure of the cold-rolled steel plate material shown in Embodiment 4 of the present invention; Figure 10 This is a schematic diagram of the structure of the cold-rolled steel plate material shown in Embodiment 5 of the present invention; Figure 11 This is a schematic diagram of the structure of the cold-rolled steel plate material shown in Embodiment Six of the present invention; Figure 12 This is a schematic diagram of the structure of the cold-rolled sheet metal product shown in Embodiment 7 of the present invention.

[0021] Legend: 1-Cold-rolled steel sheet raw material, 11-Copper plate, 111-First surface, 112-Second surface, 113-Hollowed groove, 12-Aluminum strip, 121-Exposed surface, 122-Inlaid surface, 123-Connecting surface, 124-Vertical surface, 125-Curved surface, 13-Transition area, 2-Cold-rolled steel sheet molded product, 21-Substrate, 211-Welding surface, 212-Pin surface, 213-High conductivity area, 214-Lightweight area, 22-Heat dissipation pin, 311-First cross section, 312-Second cross section, 313-Copper sheet, 314-Sorting plate, 321-First longitudinal section, 322-Second longitudinal section, 323-Third longitudinal section, 324-Fourth longitudinal section, 325-Copper block, 326-Sorting block, 327-Composite product. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Please refer to Figure 3 and Figure 4 The cold-rolled plate molded article 2 protected by this invention includes a substrate 21 and a plurality of heat dissipation pins 22 protruding from the surface of the substrate 21. The substrate 21 has a welding surface 211 and a pin surface 212. The welding surface 211 of the substrate 21 is constructed of copper. The pin surface 212 of the substrate 21 is provided with a high conductivity region 213 and at least one lightweight region 214 along a second direction of the substrate 21. The high conductivity region 213 and the lightweight region 214 extend through the entire substrate 21 along a first direction of the substrate 21, and the first direction is perpendicular to the second direction.

[0027] In some embodiments, such as Figure 3As shown, the first direction is the short side direction of the substrate 21, and the second direction is the long side direction of the substrate 21. The lightweight region 214 is elongated and extends to the opposite edges of the pin surface 212 at both ends. The lightweight regions 214 are completely separated from each other. The lightweight region 214 is made of aluminum, and the high conductivity region 213 is made of copper. The heat dissipation pins 22 are all formed on the pin surface 212 of the substrate 21, and at least some of the heat dissipation pins 22 are formed on the high conductivity region 213 of the substrate 21.

[0028] In some embodiments, such as Figure 3 and Figure 4 As shown, the high conductivity region 213 and the lightweight region 214 are alternately arranged along the second direction.

[0029] The welding surface 211 of the substrate 21 is an integral structure made entirely of copper, facilitating the welding of components. Since the welding surface 211 is entirely constructed of copper, a copper plate 11 with a certain thickness and high-purity copper can be obtained through simple layer-by-layer cutting. Because the lightweight aluminum region 214 and the high-conductivity copper region 213 are alternately arranged, a large amount of copper can be obtained through simple vertical cutting. Simultaneous cutting in two directions allows for the separation of high-purity copper and composite materials containing some copper and a large amount of aluminum at a lower cost, reducing the cost of recycled copper raw materials and thus lowering the overall material cost of production. Since the lightweight region 214 penetrates the pin surface 212, the thickness of the aluminum layer corresponding to the lightweight region 214 can be observed from the side of the cold-formed product 2, ensuring that the cut copper does not contain excessive aluminum. Furthermore, the lightweight region 214 penetrates the pin surface 212, eliminating the need for aluminum to be composited with copper at the end face, reducing the composite area, lowering composite costs, and facilitating mass production.

[0030] Please refer to the following examples for details.

[0031] Example 1: The cooling plate shown in a preferred embodiment of this application is obtained by passivating the copper portion of the surface of the cold-rolled sheet 2 through electroplating, as detailed below. The cold-rolled sheet 2 is forged from the cold-rolled sheet material 1. In other embodiments, the surface treatment method and area of ​​the cold-rolled sheet 2 can be adjusted according to actual needs.

[0032] Please see Figure 1 and Figure 2 In this embodiment, the cold plate material 1 is obtained by combining a copper plate 11 and an aluminum strip 12.

[0033] The copper plate 11 is a rectangular plate with rounded corners. The adjacent two edges of the copper plate 11 extend along a first direction and a second direction, respectively, with the length of the copper plate 11 in the second direction greater than that in the first direction. Taking the thickness direction of the copper plate 11 as a third direction, the first, second, and third directions are mutually perpendicular. The copper plate 11 has a first surface 111 and a second surface 112 that are opposite to and parallel to the first and second directions, and the second surface 112 of the copper plate 11 is a complete plane. The first surface 111 of the copper plate 11 forms multiple perforated grooves 113. The perforated grooves 113 extend along the first direction and penetrate the copper plate 11 along the first direction. The width and position of each perforated groove 113 along the second direction are flexibly set according to heat dissipation requirements, and the two outermost perforated grooves 113 are connected to the two edges of the first surface 111 of the copper plate 11 along the second direction, because the heat dissipation requirements at the edges of the cooling plate are usually weaker. The aluminum strip 12 is embedded in the hollow groove 113 and its shape matches the hollow groove 113.

[0034] The aluminum strip 12 is constructed as an axisymmetric structure with a third direction as its central axis, and has an exposed surface 121, an embedded surface 122, and two connecting surfaces 123. Both the exposed surface 121 and the embedded surface 122 are constructed as elongated rectangular planes extending along a first direction, and the width of the exposed surface 121 along a second direction is greater than that of the embedded surface 122. The two connecting surfaces 123 are respectively connected between the two side edges of the exposed surface 121 and the embedded surface 122 along the second direction. The connecting surfaces 123 include a vertical surface 124 and an arc surface 125 that are connected to each other. The vertical surface 124 is perpendicularly connected to the embedded surface 122. The arc surface 125 is constructed as an arc-shaped curved surface that curves towards the inside of the aluminum strip 12, and is directly connected between the vertical surface 124 and the exposed surface 121. In this embodiment, the angle between the line connecting the same side edges of the embedded surface 122 and the exposed surface 121 and the third-direction component is... Approximately 10 degrees. In other embodiments, the angle between the line connecting the same-side edges of the inset surface 122 and the exposed surface 121 and the third-party member. It can also be, for example, 5 degrees, 8 degrees, 13 degrees or 15 degrees. By setting the vertical surface 124 and the curved surface 125, the connection area between the copper plate 11 and the aluminum strip 12 is increased, which helps to improve the connection strength.

[0035] The exposed surface 121 of the aluminum strip 12 is flush with the first surface 111 of the copper plate 11, and the embedded surface 122 and connecting surface 123 of the aluminum strip 12 are connected to the inner wall of the hollow groove 113. In this embodiment, the copper plate 11 and the aluminum strip 12 are connected by vacuum diffusion welding. In other embodiments, the copper plate 11 and the aluminum strip 12 can also be connected by vacuum aluminum brazing, hot rolling, cold rolling, and friction welding. A transition zone 13 is formed at the interface between the copper plate 11 and the aluminum strip 12. This region has relatively poor mechanical properties and a more complex composition. During the process of forming the cold-rolled sheet 2 from the forged cold-rolled sheet material 1, the aluminum strip 12 is compressed by the copper plate 11, causing one end of its arc surface 125 adjacent to the first surface 111 of the copper plate 11 to bend inward. Therefore, the arc surface 125 is constructed with an inwardly curved shape in the middle, which helps to prevent excessive deformation of the transition zone 13, thereby ensuring the connection strength.

[0036] Please see Figure 1 , Figure 3 and Figure 4 The cold-rolled sheet product 2, formed by forging the cold-rolled sheet material 1, includes a substrate 21 and multiple heat dissipation pins 22 protruding from the surface of the substrate 21. By forging, the first surface 111 of the copper plate 11 and the exposed surface 121 of the aluminum strip 12 of the cold-rolled sheet material 1 are partially protruded upward to form multiple heat dissipation pins 22.

[0037] The substrate 21 has opposing solder surfaces 211 and pin surfaces 212. The solder surface 211 of the substrate 21 is entirely made of copper, with three square areas (not shown) pre-defined in its center as soldering areas for soldering components. The pin surface 212 of the substrate 21 has multiple high-conductivity areas 213 formed by copper plates 11, multiple lightweight areas 214 formed by aluminum strips 12, and an interface area (not shown) formed by transition areas 13. Both the high-conductivity areas 213 and the lightweight areas 214 are constructed as elongated strips extending along a first direction, with their ends flush with each other. In this embodiment, the area ratio of the lightweight areas 214 within the pin surface 212 is approximately 30%. In other embodiments, the area ratio of the lightweight areas 214 within the pin surface 212 can be, for example, any value among 10%, 20%, 50%, and 70%. Multiple heat dissipation pins 22 are arranged in the central region of the pin surface 212 of the substrate 21, and the overall arrangement area is rectangular. Multiple heat dissipation pins 22 are arranged in a row along a first direction, and multiple rows of heat dissipation pins 22 are arranged along a second direction, with adjacent rows of heat dissipation pins 22 staggered. Each row of heat dissipation pins 22 is located entirely within the high conductivity zone 213 or the lightweight zone 214, and is completely staggered from the interface zone to prevent tearing of the transition zone 13 with poor mechanical properties during forging. No heat dissipation pins 22 are formed on the surface of the two outermost lightweight zones 214, and at least one row of heat dissipation pins 22 is formed in each of the two outermost high conductivity zones 213, thereby compensating for the weak heat dissipation capacity of the outer lightweight zones 214.

[0038] In this implementation, after the cold-rolled steel plate 1 is forged into a cold-rolled steel plate 2, some of it undergoes surface treatment to form a cooling plate, while the remaining defective products are recycled as raw materials.

[0039] The surface of the heat dissipation pin 22 corresponding to the high conductivity area 213 of the qualified cold plate molded product 2, the high conductivity area 213 of the pin surface 212, the four sides connecting the welding surface 211 and the pin surface 212, and all surfaces of the welding surface 211 except for the welding area need to be surface treated. That is to say, except for the three preset welding areas, all surfaces of the cold plate molded product 2 made of copper need to be surface treated.

[0040] Please see Figure 6 Methods for recycling defective raw materials include: S1. Obtain the defective product from the above-mentioned cold-rolled sheet molding product 2.

[0041] S2. Cut the defective product along a cross section parallel to the substrate 21, separate the solder surface 211 of the defective product, and obtain a copper sheet 313 made of metallic copper, and the cut product.

[0042] S3. Cut the cut product along a longitudinal section perpendicular to the substrate 21 and parallel to the extension direction of the lightweight region 214. Each longitudinal section corresponds to the position of the adjacent edge within the high conductivity region 213, and each high conductivity region 213 corresponds to at least two longitudinal sections, to obtain a copper block 325 constructed of metallic copper and a composite product 327.

[0043] In step S1, defective products are screened out from the obtained cold-rolled sheet molded products 2 using visual recognition. In other embodiments, defective products can be screened out by manual observation or other methods.

[0044] In steps S2 and S3, defective products are cut along the cross-section and longitudinal section by milling. For details on the cutting method, please refer to [link / reference needed]. Figure 1 , Figure 4 and Figure 6 .

[0045] In step S2, the depth of the metallic aluminum in the lightweight region 214 is determined by observing the side of the defective product. The substrate 21 is cut along a first cross-section 311 and a second cross-section 312 that are preset and parallel to the first and second directions. The second cross-section 312 is located on the side of the first cross-section 311 away from the welding surface 211, and is positioned between the bottom of the metallic aluminum in the lightweight region 214 and the welding surface 211. After cutting, a copper sheet 313 including the original welding surface 211 and a sorting plate 314 at the bottom of the portion adjacent to the metallic aluminum structure are obtained. Because the transition zone 13 undergoes deformation that is difficult to fully control under external force during forging, the shape and contour of the interface area are difficult to define precisely. By setting the first cross-section 311 and the second cross-section 312, and separating the copper sheet 313 and the cut product with the sorting plate 314, it is ensured that the copper sheet 313 contains no metallic aluminum and has high purity, and a sorting plate 314 with a high probability of not containing metallic aluminum and having a high copper content is obtained.

[0046] In step S3, the defective product is kept still while cutting continues. Cutting is performed along longitudinal sections parallel to the first and third directions. Multiple sets of longitudinal sections are provided, and each set includes a first longitudinal section 321, a second longitudinal section 322, a third longitudinal section 323, and a fourth longitudinal section 324 arranged sequentially along the second direction. Each high-conductivity region 213 of the substrate 21 corresponds to a set of longitudinal sections. The first longitudinal section 321 and the fourth longitudinal section 324 of each set correspond to the high-conductivity region 213 of the substrate 21 and are located adjacent to the interface region, completely separating the copper metal between adjacent lightweight regions 214. Copper blocks 325 are obtained by cutting along the second longitudinal section 322 and the third longitudinal section 323. Sorting blocks 326 are obtained by cutting along the first longitudinal section 321 and the second longitudinal section 322. Another sorting block 326 is obtained by cutting along the third longitudinal section 323 and the fourth longitudinal section 324. The remaining portion, including the original lightweight region 214, is the composite product 327. By setting the first longitudinal section 321, the second longitudinal section 322, the third longitudinal section 323, and the fourth longitudinal section 324, a copper block 325 with high purity is obtained, as well as a sorting block 326 that may be mixed with a small amount of copper due to deformation of the transition zone 13. The remaining composite product 327 contains a large amount of aluminum and a small amount of copper, and has low recycling value, so it is not recycled in this embodiment. In this embodiment, the cutting depth along the longitudinal section extends to the surface or interior of the copper sheet 313, thereby simultaneously cutting the sorting plate 314 into multiple pieces. In other embodiments, the cutting depth along the longitudinal section is smaller, making it impossible to completely divide the sorting plate 314.

[0047] In this embodiment, copper sheet 313 and copper block 325 are directly recycled as pure copper material. The sorting plate 314 and sorting block 326 are crushed and sorted, and the pure copper fragments are selected for recycling. In other embodiments, the sorting plate 314 and sorting block 326 can be screened into two parts: one containing a small amount of aluminum and the other without aluminum. The aluminum-free part is directly recycled as pure copper material, while the part containing a small amount of aluminum is recycled through crushing, sorting, or purification.

[0048] In this embodiment, the high-purity copper and the areas formed by the aluminum strips 12, as well as the surrounding areas, can be separated by simple cutting or crushing the defective product into large pieces. After sorting, the copper is smelted and purified, achieving the recovery of the high-value copper. The remaining composite material, consisting of a large amount of aluminum and a small amount of copper, has low value and high recycling costs. It can be disposed of directly or crushed into pieces and then sorted and purified again to complete the recycling.

[0049] Example 2: Please see Figure 7 The only difference between this embodiment and Embodiment 1 is that in this embodiment, the surface of the lightweight area 214 of the cold plate molded product 2 does not have heat dissipation pins 22, and all heat dissipation pins 22 are copper pins.

[0050] Example 3: Please see Figure 8 The only difference between this embodiment and embodiment one is that in this embodiment, the connecting surface 123 of the aluminum strip 12 of the cold plate raw material 1 is a complete plane, the cross section of the aluminum strip 12 is an isosceles trapezoidal shape, and the cross section structure of the cold plate formed product 2 changes accordingly.

[0051] Example 4: Please see Figure 9 The only difference between this embodiment and Embodiment 1 is that in this embodiment, the connecting surface 123 of the aluminum strip 12 of the cold plate raw material 1 only includes the vertical surface 124, the cross-section of the aluminum strip 12 is rectangular, and the cross-sectional structure of the cold plate formed product 2 changes accordingly.

[0052] Example 5: Please see Figure 10 The only difference between this embodiment and Embodiment 1 is that in this embodiment, the connecting surface 123 of the aluminum strip 12 of the cold plate raw material 1 only includes the arc surface 125, and the cross-sectional structure of the cold plate formed product 2 is changed accordingly.

[0053] Example 6: Please see Figure 11 The only difference between this embodiment and the first embodiment is that in this embodiment, the width of the exposed surface 121 of the aluminum strip 12 of the cold plate material 1 is smaller than the inner surface 122, and the aluminum strip 12 is snapped into the hollow groove 113, so the cross-sectional structure of the cold plate molded product 2 changes accordingly.

[0054] Example 7: Please see Figure 12 The difference between this embodiment and the first embodiment is that in this embodiment, the two hollow grooves 113 of the cold plate material 1 extend along the second direction and penetrate the copper plate 11 along the second direction. Correspondingly, two lightweight areas 214 and two high-conductivity areas 213 are formed on the needle surface 212 of the cold plate molded product 2.

[0055] The beneficial effects of this invention are that it provides a cooling plate, a cold plate molded product 2, and a cold plate raw material 1 that take into account low cost, lightweight, and high heat dissipation, and the cold plate molded product 2 is easy to recycle copper. By reducing the raw material recycling cost of the cold plate molded product 2, which has a high defect rate, the overall raw material cost of the production line is reduced, which helps to reduce production costs.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cold-formed steel product, characterized in that, The device includes a substrate (21) and multiple heat dissipation pins (22) formed on the surface of the substrate (21). The substrate (21) has opposing solder surfaces (211) and pin surfaces (212). The solder surfaces (211) of the substrate (21) are made of copper. The pin surfaces (212) of the substrate (21) have a high conductivity region (213) and at least one lightweight region (214). The lightweight region (214) is elongated and extends to the opposite sides of the pin surfaces (212) at both ends. The lightweight regions (214) are completely separated from each other. The lightweight regions (214) are made of aluminum and the high conductivity region (213) is made of copper. The heat dissipation pins (22) are all formed on the pin surfaces (212) of the substrate (21), and at least some of the heat dissipation pins (22) are formed on the high conductivity region (213) of the substrate (21).

2. The cold-formed steel plate article as described in claim 1, characterized in that, The multiple lightweight regions (214) extend along a first direction, and the two sides of the needle surface (212) along a second direction are respectively located within the two lightweight regions (214), the first direction and the second direction being perpendicular to each other.

3. The cold-formed steel plate article as described in claim 2, characterized in that, Some of the heat dissipation pins (22) are formed in the lightweight region (214) and are made of aluminum, while some of the heat dissipation pins (22) are formed in the high conductivity region (213) and are made of copper. The area ratio of the lightweight region (214) within the pin surface (212) is any value less than or equal to 70%.

4. The cold-formed steel plate article as described in claim 2, characterized in that, The multiple heat dissipation pins (22) are arranged in multiple rows that are parallel to the first direction, and the two rows of heat dissipation pins (22) closest to the two sides of the pin surface (212) in the second direction are respectively formed in the two high conductivity regions (213).

5. The cold-formed steel plate article as described in claim 1, characterized in that, An interface region is formed at the junction of the adjacent high conductivity region (213) and lightweight region (214) on the needle surface (212), and each of the heat dissipation needles (22) is separated from the interface region.

6. A method for recycling defective raw materials, characterized in that, include: Obtain defective products from the cold-rolled sheet forming articles (2) as described in any one of claims 1 to 5; The defective product is cut along a cross section parallel to the substrate (21), and the solder surface (211) of the defective product is separated to obtain a copper sheet (313) made of metallic copper, and the cut product. The cut article is cut along a longitudinal section perpendicular to the extension direction of the substrate (21) and parallel to the extension direction of the lightweight region (214), the longitudinal section corresponding to the position of the adjacent edge in the high conductivity region (213), and each of the high conductivity regions (213) corresponds to at least two of the longitudinal sections, to obtain a copper block (325) constructed of metallic copper, and a composite article (327).

7. The method for recycling defective raw materials as described in claim 6, characterized in that, The longitudinal sections corresponding to each of the high conductivity regions (213) of the cut product are arranged in sequence as a first longitudinal section (321), a second longitudinal section (322), a third longitudinal section (323), and a fourth longitudinal section (324). The copper block (325) is obtained by cutting along the second longitudinal section (322) and the third longitudinal section (323). The sorting block (326) is obtained by cutting along the first longitudinal section (321) and the second longitudinal section (322). Another sorting block (326) is obtained by cutting along the third longitudinal section (323) and the fourth longitudinal section (324). The main material of the sorting block (326) is metallic copper.

8. The method for recycling defective raw materials as described in claim 6, characterized in that, The cross-section includes a first cross-section (311) and a second cross-section (312) that are parallel to each other. The second cross-section (312) is located on the side of the first cross-section (311) away from the welding surface (211) of the defective product. The copper sheet (313) is obtained by cutting along the first cross-section (311). The sorting plate (314) is obtained by cutting along the first cross-section (311) and the second cross-section (312). The main material of the sorting plate (314) is metallic copper.

9. A cold-rolled steel sheet material, characterized in that, For forging to form a cold-rolled sheet (2) as described in any one of claims 1 to 5, the cold-rolled sheet material (1) comprises a copper plate (11) and an aluminum strip (12), the copper plate (11) having opposing first surfaces (111) and second surfaces (112), the first surface (111) having a plurality of perforated grooves (113) formed therein, and the perforated grooves (113) penetrating the opposing two sides of the copper plate (11), the aluminum strip (12) having an exposed surface (121), an inlaid surface (122) opposite to the exposed surface (121), and a connecting surface to the... The two connecting surfaces (123) between the exposed surface (121) and the embedded surface (122) are provided. The shapes of the multiple aluminum strips (12) are respectively matched with the hollow grooves (113) and are embedded in the hollow grooves (113). The exposed surface (121) of the aluminum strip (12) is flush with the first surface (111) of the copper plate (11). The embedded surface (122) and the connecting surface (123) of the aluminum strip (12) are connected to the inner wall of the hollow groove (113) and form a transition area (13) at the interface.

10. The cold-rolled steel plate material as described in claim 9, characterized in that, The inner surfaces (122) of each of the aluminum strips (12) are flush with each other, and the width of the inner surface (122) is less than or equal to the width of the exposed surface (121).

11. The cold-rolled steel plate material as described in claim 9, characterized in that, With the thickness direction of the cold plate material (1) as the third direction, the angle between the line connecting the same side edge of the inner surface (122) and the exposed surface (121) of each aluminum strip (12) and the third direction member is any value less than or equal to 15 degrees.

12. The cold-rolled steel plate material as described in claim 9, characterized in that, The connecting surface (123) of the aluminum strip (12) includes a vertical surface (124) and / or an arc surface (125). The vertical surface (124) is perpendicular to the embedded surface (122) and the exposed surface (121), and the vertical surface (124) is directly connected to the embedded surface (122). The arc surface (125) is constructed in an arc shape and bends toward the inside of the aluminum strip (12). The arc surface (125) is directly connected to the exposed surface (121).

13. A cooling plate, characterized in that, It is obtained by surface treatment of the needle surface (212) and the heat dissipation needle (22) of the cold plate molded article (2) as described in any one of claims 1 to 5.

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