Manufacturing method of heat dissipation metal composite belt

Abstract

The embodiment of the invention provides a manufacturing method of a heat dissipation metal composite belt. The manufacturing method comprises the steps that a first metal layer and a second metal layer are provided; providing a first heating device and a second heating device; heating the first metal layer to a first temperature in the first heating device, and heating the second metal layer to a second temperature in the second heating device; and laminating and extruding the first metal layer and the second metal layer. According to the manufacturing method of the heat dissipation metal composite belt, the thickness of each metal layer in the metal composite belt can be accurately controlled, and the machining efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of metal processing technology, and in particular to a method for manufacturing a heat dissipating metal composite strip. Background Art

[0002] The present invention relates to the field of metal processing. In the prior art, it is often necessary to press metal sheets of various materials into composite sheets to obtain better performance, but it is usually impossible to accurately control the thickness ratio of each material after pressing. Especially for the 3C heat dissipation field, some current process technologies use two metal strips A+B to control the composite process to achieve a composite metal strip process with an ultra-thin copper layer. This method of setting the electroplating layer not only has high energy consumption and low efficiency, but is also not suitable for products with excessive thickness. However, it is impossible to achieve accurate control of the thickness ratio through existing pressing technology. Therefore, there is a need for a method that can accurately control the thickness of each metal layer in the metal composite strip and improve processing efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for manufacturing a heat dissipating metal composite strip, which can accurately control the thickness of each metal layer in the metal composite strip and improve processing efficiency.

[0004] According to an embodiment of the present invention, a method for manufacturing a heat-dissipating metal composite tape includes: providing a first metal layer and a second metal layer; providing a first heating device and a second heating device; heating the first metal layer to a first temperature in the first heating device, and heating the second metal layer to a second temperature in the second heating device; and laminating and extruding the first metal layer and the second metal layer.

[0005] According to an embodiment of the present invention, a method for manufacturing a heat-dissipating metal composite tape has at least the following beneficial effects: the first metal layer and the second metal layer can be heated to different temperatures by different heating devices, namely a first heating device and a second heating device, so that the first metal layer and the second metal layer can obtain controllable different elongations under a specific pressure, that is, by adjusting the first temperature and the second temperature, the thickness ratio of the first metal layer and the second metal layer after the lamination extrusion can be controlled.

[0006] According to some embodiments of the present invention, the material of the first metal layer is stainless steel, the material of the second metal layer is copper, the first temperature is not less than 110°C and not more than 150°C, and the second temperature is not more than 750°C and not less than 450°C.

[0007] According to some embodiments of the present invention, before the first metal layer enters the first heating device, the side of the first metal layer facing the second metal layer is cleaned, and before the second metal layer enters the second heating device, the side of the second metal layer facing the first metal layer is cleaned.

[0008] According to some embodiments of the present invention, the method for manufacturing the heat dissipating metal composite strip further includes: providing a third metal layer and a third heating device, heating the third metal layer to a third temperature in the third heating device, and laminating the third metal layer to the side of the first metal layer facing away from the second metal layer and extruding it.

[0009] According to some embodiments of the present invention, the ambient temperature when the first metal layer and the second metal layer are extruded is a fourth temperature, the fourth temperature is not greater than the first temperature, and the difference between the fourth temperature and the first temperature does not exceed 100°C.

[0010] According to some embodiments of the present invention, a rolling device is provided. When the first metal layer and the second metal layer are pressed together, the first metal layer and the second metal layer are rolled using the rolling device. The rolling speed of the rolling device is not greater than 1.6 m / min and not less than 0.7 m / min.

[0011] According to some embodiments of the present invention, a total deformation of the first metal layer and the second metal layer before lamination and after lamination is no more than 60% and no less than 40%.

[0012] According to some embodiments of the present invention, the first metal layer enters the rolling device at a first speed, and the second metal layer enters the rolling device at a second speed, where the second speed is less than the first speed.

[0013] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of a heat dissipation metal composite belt of the present invention; Figure 2 It is a structural schematic diagram of another embodiment of a heat dissipation metal composite belt of the present invention; Figure 3 It is a schematic diagram of a method for manufacturing a heat dissipating metal composite belt according to the present invention.

[0015] Figure Number: 1. First metal layer; 2. Second metal layer; 3. Third metal layer; 4. Rolling device; 5. First feeding device; 6. First heating device; 7. Second feeding device; 8. Second heating device. DETAILED DESCRIPTION

[0016] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0017] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0018] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0020] In current rolling-bonded metal composite strip production methods, the pressure generated during rolling is used to simultaneously plastically deform two or more metal sheets, rupturing the surface metal layers and exposing clean, activated metal, thereby forming a metallurgical bond between the sheet surfaces. However, the thickness ratio between the different metal layers in the composite strip is typically achieved by directly controlling the thickness of the metal sheets before lamination. Therefore, adjusting the metal ratio in the composite strip is extremely inconvenient.

[0021] In some metal composite strip pressing processes, the composite strip to be pressed is usually also heated, and the heating method is usually overall synchronous heating, and the temperature of each metal layer is basically in the same temperature range. The high temperature accelerates the diffusion rate of elements between the interfaces of the metal composite strips, enhances the metallurgical bonding strength of the interface, and enhances the plastic deformation ability of the metal, so that the metal strip can be better fitted and formed during the pressing process. Therefore, the current heating method of the metal composite strip pressing process does not have the function of controlling the deformation of different metal layers under the same pressure, and thus cannot achieve adjustment or control of the thickness ratio during the pressing process. In comparison, the embodiment of the present application controls the deformation of the metal layer when it is subjected to extrusion force by controlling the temperature of different metal layers, so as to adjust or control the thickness ratio of different metal layers after fitting and extrusion during the pressing process, and the control method is more flexible and convenient.

[0022] Reference Figure 1 and Figure 3A method for manufacturing a heat-dissipating metal composite tape according to a first embodiment of the present invention includes: providing a first metal layer 1 and a second metal layer 2; providing a first heating device 6 and a second heating device 8; heating the first metal layer 1 to a first temperature in the first heating device 6 and the second metal layer 2 to a second temperature in the second heating device 8; and laminating and extruding the first and second metal layers 1 and 2. Under the same extrusion pressure, differences in metal temperature can cause differences in deformation. When metals are at lower temperatures, their molecular mobility is lower and their resistance to deformation is higher, resulting in relatively smaller deformation. Conversely, when the metal temperature rises, its molecular mobility increases, making the material relatively softer and its resistance to deformation weaker, resulting in greater deformation under the same extrusion pressure. During laminating and extruding the first and second metal layers 1 and 2, the extrusion pressures applied to the first and second metal layers 1 and 2 are the same. In order to control the thickness ratio of the first and second metal layers 1 and 2 in the metal composite tape, it is necessary to control the deformation of the first and second metal layers 1 and 2 under the extrusion pressure. Therefore, before pressing the first metal layer 1 and the second metal layer 2, the first metal layer 1 is heated to a first temperature and the second metal layer 2 is heated to a second temperature, so that the first metal layer 1 and the second metal layer 2 can obtain a controllable deformation when they are pressed at the same time. For example, when the first metal layer 1 needs to obtain a larger deformation, the first temperature is increased or the second temperature is decreased. Among them, when the first temperature is increased, the first metal layer 1 will be softer when the first metal layer 1 and the second metal layer 2 are pressed, so that the first metal layer 1 has a larger deformation. Lowering the second temperature will make the second metal layer 2 harder, so that the deformation of the second metal layer 2 will be smaller, and thus the first metal layer 1 will also have a larger deformation. Therefore, by controlling the first temperature and the second temperature, the thickness ratio between the first metal layer 1 and the second metal layer 2 in the metal composite strip can be controlled.

[0023] From a microscopic observation, after heating the first metal layer 1 and the second metal layer 2, the movement of atoms in the first metal layer 1 and the second metal layer 2 will become more intense. At this time, the first metal layer 1 and the second metal layer 2 can be fused with higher quality under less pressure. The characteristics of the metal itself are that the higher the temperature, the lower its hardness will be. At the same time, the higher the temperature, the greater the deformation of the metal under the same pressure. It should be noted that when the first metal layer 1 and the second metal layer 2 are pressed together, the side of the first metal layer 1 facing away from the second metal layer 2 and the side of the second metal layer 2 facing away from the first metal layer 1 are pressed together. This pressing method determines that when the first metal layer 1 and the second metal layer 2 are pressed together, the extrusion pressure on both is the same. Therefore, it is not possible to adjust the degree of deformation of the first metal layer 1 and the second metal layer 2 by adjusting the pressing pressure, nor is it possible to adjust the proportion of each metal layer in the composite strip by adjusting the pressure. In this embodiment, the first metal layer 1 and the second metal layer 2 are heated separately so that the first metal layer 1 and the second metal layer 2 are at different temperatures during pressing. By adjusting the temperature of the first metal layer 1 and the temperature of the second metal layer 2, the thickness of the first metal layer 1 and the second metal layer 2 after being subjected to the same pressure during simultaneous pressing can be adjusted, thereby adjusting the thickness ratio of each metal layer in the metal composite strip.

[0024] According to some embodiments of the present invention, the first metal layer 1 is made of stainless steel, the second metal layer 2 is made of copper, the first temperature is not less than 110°C and not more than 150°C, and the second temperature is not less than 750°C and not less than 450°C. The materials of each metal layer of the metal composite strip can be selected based on the properties required in the actual scenario. For example, if the metal composite strip requires both good support and good conductivity, the first metal layer 1 can be made of stainless steel, and the second metal layer 2 can be made of copper. Furthermore, if stronger conductivity is required, the thickness ratio of the second metal layer 2 can be increased, and if stronger support is required, the thickness ratio of the first metal layer 1 can be increased. The thickness ratio of the first metal layer 1 and the second metal layer 2 is controlled by controlling the specific values ​​of the first and second temperatures. Furthermore, limiting the specific values ​​of the first and second temperatures prevents both temperatures from being too low, making them difficult to fuse, and from being too high, causing them to melt. For another example, the first metal layer can be made of aluminum, while the second metal layer can be made of copper. It should be noted that different metal materials can be selected for the first metal layer 1 and the second metal layer 2 according to different usage scenarios. In addition, after selecting the metal materials, the thickness of the first metal layer 1 and the thickness of the second metal layer 2 are set according to the structural strength or conductivity requirements of the usage scenario. At this time, the appropriate temperature is selected based on the thickness of the first metal layer 1 and the material hardness of the first metal layer 1, thereby determining the thickness of each metal layer in the heat dissipating composite metal strip.

[0025] According to some embodiments of the present invention, before the first metal layer 1 enters the first heating device 6, the side of the first metal layer 1 facing the second metal layer 2 is cleaned, and before the second metal layer 2 enters the second heating device 8, the side of the second metal layer 2 facing the first metal layer 1 is cleaned, thereby effectively preventing impurities on the surface of the first metal layer 1 and / or the second metal layer 2 (such as an isolation layer formed by impurities such as oxides and sulfides during the pressing process) from affecting the bonding strength after pressing. After cleaning, it can also prevent defects such as pits and scratches formed on the surface of the composite strip by impurities embedded in the pressing process, thereby improving the mechanical properties of the metal composite strip, avoiding corrosion problems caused by impurities, and increasing the service life. In specific implementations, the surface of the first metal layer 1 and / or the second metal layer 2 can be cleaned by various cleaning methods such as high-pressure washing and grinding.

[0026] According to some embodiments of the present invention, referring to Figure 2 The method for manufacturing the heat dissipating metal composite tape further includes providing a third metal layer 3 and a third heating device, heating the third metal layer 3 to a third temperature in the third heating device, and laminating the third metal layer 3 to the side of the first metal layer 1 facing away from the second metal layer 2 and extruding the third metal layer 3. As needed, more metal layers can be provided to obtain a composite metal tape with a wider range of properties.

[0027] If the temperature of the first metal layer 1 and the second metal layer 2 is lost too quickly during the processing, the hardness of the first metal layer 1 and the second metal layer 2 will increase, resulting in the inability to press the heat dissipating composite metal strip to the preset thickness, and causing a large deviation in the thickness ratio of the first metal layer 1 and the second metal layer 2 in the composite metal strip. Based on this, according to some embodiments of the present invention, the ambient temperature when the first metal layer 1 and the second metal layer 2 are extruded is a fourth temperature, the fourth temperature is not greater than the first temperature, and the difference between the fourth temperature and the first temperature does not exceed 100°C. By setting the fourth temperature, it is possible to avoid the first metal layer 1 and the second metal layer 2 from losing heat too quickly after being heated. The fourth temperature does not exceed the lower temperature of the first temperature and the second temperature, that is, it does not exceed the first temperature, thereby avoiding secondary heating of the first metal layer 1 or the second metal layer 2.

[0028] According to some embodiments of the present invention, a rolling device 4 is provided. When the first metal layer 1 and the second metal layer 2 are pressed together, the first metal layer 1 and the second metal layer 2 are rolled using the rolling device 4. The rolling speed of the rolling device 4 is not greater than 1.6 m / min and not less than 0.7 m / min. When the rolling speed of the rolling device 4 is within this range, it can effectively avoid problems such as increased wear between the rolling device 4 and the metal composite strip and uneven material deformation caused by excessively fast rolling speeds, and avoid problems such as the metal composite strip slipping on the rolling device 4 or even damage to the metal composite strip caused by excessively slow rolling speeds, thereby effectively improving the quality of the metal composite strip. Preferably, the rolling speed of the rolling device 4 is set to 1 m / min. This has both high product quality and high processing efficiency.

[0029] According to some embodiments of the present invention, the total deformation of the first metal layer 1 and the second metal layer 2 before and after lamination is no more than 60% and no less than 40%. When the total deformation is too small, the fusion between the first metal layer 1 and the second metal layer 2 may not be sufficient, while when the total deformation is too large, it may cause the metal composite strip to break. By controlling the total deformation after lamination within an appropriate range, the first metal layer 1 and the second metal layer 2 can be fully fused and the risk of breakage can be reduced.

[0030] According to some embodiments of the present invention, the first metal layer 1 enters the rolling device 4 at a first speed, and the second metal layer 2 enters the rolling device 4 at a second speed, where the second speed is less than the first speed. While controlling the first temperature and the second temperature to adjust the thickness ratio of the first metal layer 1 and the second metal layer 2, the feeding speed, i.e., the first speed and the second speed, can also be adjusted according to the material ratio, thereby making the various metal layers of the metal composite strip more evenly fused.

[0031] According to an embodiment of the present invention, a metal composite strip processing equipment includes: a first feeding device 5, the first feeding device 5 is used to release the first metal layer 1 at a first speed; a second feeding device 7, the second feeding device 7 is used to release the second metal layer 2 at a second speed; a first heating device 6, the first heating device 6 is arranged downstream of the first feeding device 5, and the first heating device 6 is used to heat the first metal layer 1 released by the first feeding device 5 to a first temperature; a second heating device 8, the second heating device 8 is arranged downstream of the second feeding device 7, and the second heating device 8 is used to heat the second metal layer 2 released by the second feeding device 7 to a second temperature; a rolling device 4, the rolling device 4 is arranged downstream of the first heating device 6 and the second heating device 8, and the rolling device 4 is used to roll the heated first metal layer 1 and the heated second metal layer 2.

[0032] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A method for manufacturing a heat dissipation metal composite belt, characterized in that: include: providing a first metal layer and a second metal layer; providing a first heating device and a second heating device; heating the first metal layer to a first temperature in the first heating device, and heating the second metal layer to a second temperature in the second heating device; The first metal layer and the second metal layer are laminated and extruded.

2. The method for manufacturing a heat dissipation metal composite strip according to claim 1, characterized in that: The material of the first metal layer is stainless steel, the material of the second metal layer is copper, the first temperature is not less than 110°C and not more than 150°C, and the second temperature is not more than 750°C and not less than 450°C.

3. The method for manufacturing a heat dissipation metal composite strip according to claim 2, wherein: A rolling device is provided. When the first metal layer and the second metal layer are pressed together, the first metal layer and the second metal layer are rolled using the rolling device. The rolling speed of the rolling device is not greater than 1.6 m / min and not less than 0.7 m / min.

4. The method for manufacturing a heat dissipating metal composite strip according to claim 3, wherein: The first metal layer enters the rolling device at a first speed, and the second metal layer enters the rolling device at a second speed, which is lower than the first speed.

5. The method for manufacturing a heat dissipating metal composite strip according to claim 1, wherein: Before the first metal layer enters the first heating device, the side of the first metal layer facing the second metal layer is cleaned; before the second metal layer enters the second heating device, the side of the second metal layer facing the first metal layer is cleaned.

6. The method for manufacturing a heat dissipating metal composite strip according to claim 1, wherein: The method for manufacturing the heat dissipation metal composite strip further comprises: A third metal layer and a third heating device are provided, the third metal layer is heated to a third temperature in the third heating device, and the third metal layer is attached to a side of the first metal layer facing away from the second metal layer and extruded.

7. The method for manufacturing a heat dissipating metal composite strip according to claim 1, characterized in that: The ambient temperature when the first metal layer and the second metal layer are extruded is a fourth temperature, the fourth temperature is not greater than the first temperature, and the difference between the fourth temperature and the first temperature does not exceed 100°C.

8. The method for manufacturing a heat dissipating metal composite strip according to claim 1, characterized in that: The total deformation of the first metal layer and the second metal layer before lamination and the total deformation of the first metal layer and the second metal layer after lamination is no more than 60% and no less than 40%.

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