CN116000333B - Device for preparing metal fin with wave structure and preparation method thereof - Google Patents

Abstract

The present invention discloses a device for preparing metal fins with a corrugated structure and a preparation method thereof. The preparation method comprises three processes in sequence, namely, heating of the workpiece, forming of a groove structure, and forming of a corrugated structure. The metal workpiece is softened by heating. The metal surface is first "ploughed and shaped" into a groove structure by a plowing tool. The groove structure is "stacked and folded" into a corrugated structure by a cutting tool, and the corrugated structure is cut and separated from the workpiece body together with part of the matrix. Through the above processes, a three-dimensional fin strip with a continuous strip at the bottom and a corrugated structure at the top can be prepared. The present invention can not only successfully prepare metal fins with a corrugated structure, but also has a simple and efficient method, a flexible device, and can be industrialized and promoted for application.

Description

A device for preparing corrugated metal fins and a method for preparing the same

Technical Field

The invention relates to the technical field of metal fin manufacturing, and more specifically to a device for preparing metal fins with a corrugated structure and a preparation method thereof.

Background technique

Forced convection cooling is a cooling method commonly used in consumer and industrial electronic products. The heat generated by the electronic device is transferred to a fluid that can be blown or pumped away to maintain an operating temperature that is beneficial to the performance of the device, thereby maintaining the reliability of the electronic system.

A common forced convection cooling method is to use an extended surface (fin) to enhance the convection heat transfer capacity of the heat carrier medium, that is, to use the fins to improve the efficiency of heat transfer from electronic devices to liquid or gas. Therefore, the heat transfer efficiency of the fins has an important influence on the cooling performance of the cooling system. The heat transfer performance of the fins is affected by many factors, such as the material, process and structure of the fins.

The common fin structures on the market are relatively simple, such as straight fins and louvered fins, and the fin size and spacing are all at the millimeter level. However, with the rapid development of manufacturing technology and microelectronics technology, the size of chips is getting smaller and smaller, and the integration is getting higher and higher. Ordinary cooling methods can no longer meet the heat dissipation needs of highly integrated chips, which will cause heat accumulation inside the components, thereby affecting the normal use and performance of electronic products and shortening their service life. Therefore, simple planar two-dimensional structures are difficult to meet the more demanding heat transfer and convection conditions, which has become a major limitation to the development of such technologies. Considering the research cost and difficulty, the research and development of fin structures is more direct and effective than the research and development of materials and processes, and the cost is lower with the assistance of computer technology. Therefore, there is an urgent need to optimize the structure of heat dissipating fins.

When designing a heat sink fin structure, the main considerations are its heat transfer performance and the resistance of air passing through its extended surface. With the development of modeling, simulation, and manufacturing technology, many micro-fins with three-dimensional structures have been proposed and prepared. These structures have various geometric shapes, such as cylindrical pin fins, ribbon fins, and plate fins. Three-dimensional metal fins have higher heat transfer efficiency than traditional flat fins due to their complex surfaces and large specific surface area. However, due to their complex structures and tiny sizes, the manufacture of complex three-dimensional structures is quite difficult.

So far, researchers have used additive manufacturing, die casting, sintering, laser processing and electrospark machining (EDM) methods to prepare fins with different three-dimensional structures. However, additive manufacturing relies on lasers to melt metal powders. Limited by the development of laser technology, the thickness of a single laser sintered layer is relatively thin. To prepare three-dimensional fins with complete morphology, multi-layer sintering is required, which is time-consuming and cost-intensive. Die casting is suitable for the manufacture of fins with larger sizes and simple structures. However, for electronic devices with increasingly higher levels of integration, their heat dissipation contact area is limited. Therefore, in order to make full use of space, fins tend to be small in size and have complex structures, which is difficult to achieve with die casting technology. Although some researchers have used sintering technology to prepare micron-scale three-dimensional structures, the manufacturing process requires multiple sinterings and molds of various different structures. Similarly, laser processing and electrospark machining technologies both require multiple processing steps. When preparing structures, it is difficult to process multiple three-dimensional structures at the same time, and the time cost is high.

It can be seen that although the existing preparation methods can produce microstructured fins with controllable geometry (shape and size), there are problems such as high manufacturing cost, low heat exchange efficiency, and complex processing technology. In addition, a large number of studies have shown that corrugated fins have better heat dissipation effect than straight fins. Therefore, it is a realistic and urgent need to propose a simple and efficient preparation method for corrugated fins and develop a corresponding preparation device.

A common fin processing method is selective laser melting. Although this method is fast, it still requires layer-by-layer scanning to obtain the desired shape (Convective heat transfer and pressure losses across novel heat sinks fabricated), and the processing technology is still very complicated.

Summary of the invention

The present invention aims to solve one of the technical problems existing in the prior art to at least a certain extent. To this end, the first object of the present invention is to provide a device for preparing a corrugated metal fin.

Another object of the present invention is to provide a method for preparing corrugated metal fins, so as to improve the heat transfer performance of the fins and make them suitable for industrial application and promotion.

To achieve the first objective, the present invention provides a device for preparing a corrugated metal fin, comprising a motion unit, a heating unit, a combined tool unit and a collecting unit.

The motion unit comprises a tool moving subunit and a workpiece moving subunit, the combined tool unit is arranged on the tool moving subunit to control the feeding of the tool, and the workpiece moving subunit is used to place the workpiece to drive the movement of the workpiece in the cutting direction;

The combined tool unit comprises a tool handle, a plowing tool, and a cutting tool. The tool handle is used to install a fixed tool. The tool handle comprises a tool handle seat, a tool seat and a positioning flange. The tool handle seat is connected to the motion unit, and the tool seat and the positioning flange are both connected to the tool handle seat. The plowing tool is used to plow a parallel and continuous groove structure with a certain height on the surface to be processed of the workpiece. The plowing tool is arranged on the tool seat. The plowing tool comprises a plowing tool block and parallel plow blades arranged on the plowing tool block. There are multiple parallel plow blades, and gaps are left between adjacent parallel plow blades as a forming channel. The cutting tool is arranged on the plowing tool. The cutting tool comprises a rake face and a cutting edge, which is used to cut and separate metal and finally obtain a corrugated structure fin.

The collecting unit is used to collect the processed corrugated structure fins.

Preferably, the tool moving subunit includes a gantry, and the gantry includes a gantry column, a transverse moving device and a longitudinal moving device. The transverse moving device is laterally arranged on the gantry column, the longitudinal moving device is arranged on the transverse moving device, and the combined tool unit is arranged on the longitudinal moving device to fix and control the feed direction movement of the combined tool unit, and the feed direction (z-axis) and plowing depth of the combined tool are controlled by the longitudinal feeding device.

The workpiece moving subunit comprises a workbench, which is located below the combined tool unit and can move in the cutting direction. The workpiece is arranged on the workbench, and the movement of the workpiece in the cutting direction is fixed and controlled by the workbench.

Preferably, the workpiece has flanges on both sides, and the flanges are provided with fixing through holes, and the workbench is provided with T-slots, and the workpiece is fixed by the cooperation of the fasteners, the fixing through holes and the T-slots. Therefore, as long as the workpiece has fixing through holes, the workpiece can be easily installed on the workbench through the T-slots, and the size of the workpiece can be selected according to specific needs.

The workpiece is a bulk metal workpiece.

Preferably, the heating unit is an induction heating module, including an induction coil and an induction heating power supply connected to the induction coil, and the induction coil is located below the entrance of the plowing tool and is used to heat the workpiece.

Preferably, the collecting unit comprises a product conveying table and a collecting box, and the product conveying table is used to transport the processed corrugated structure fins to the collecting box.

Preferably, the product conveying platform comprises a motor and a product conveying belt driven by the motor and the motor. The collecting box consists of a box body and a handle, and is used for collecting and transporting the corrugated fins.

Preferably, the plowing tool is provided with two first positioning through holes, which cooperate with the two first positioning holes provided on the tool handle; the plowing tool is also provided with a second positioning threaded blind hole, which cooperates with the second positioning hole provided on the tool handle;

The cutting tool is provided with a mounting through hole, which cooperates with the first positioning hole provided on the plowing tool for installing and removing the tool. When installing the tool, the long bolt (150) is passed through the positioning hole and then tightened with a nut. When the parameters such as the front angle of the tool need to be changed, only the tool needs to be changed;

A third positioning hole is provided on the tool handle seat for installation and positioning of the combined tool unit and the motion unit.

Preferably, a gasket is provided between the positioning flange of the tool handle and the cutting tool to change the cutting depth; at the same time, a gasket is also provided between the plowing tool and the cutting tool to adjust the relative position between the plowing tool and the cutting tool.

Preferably, the distance between the tail of the parallel plow blade and the cutting edge is set to 6.0-10.0 mm, and the height of the gap between the parallel plow blades accommodating the fins is set to 1.0-2.0 mm to reserve a suitable fin channel, which is necessary to ensure that the channel of the plowing tool is not blocked due to material accumulation during cutting, and to give full play to the "plowing and shaping" effect to promote the formation of a groove structure.

Preferably, the plowing tool is composed of a plurality of parallel plow blades, which are arranged at equal intervals. In order to prevent the plow blades from deforming and breaking, each plow blade is bilaterally symmetrical.

In order to achieve another object of the present invention, the present invention provides a method for preparing a corrugated metal fin, which is characterized by being carried out in the following steps:

Step 1: Workpiece heating

Start the heating unit and set the preset temperature to be heated. Then the temperature of the part of the workpiece affected by the heating unit rises. When the temperature reaches the preset temperature and is kept warm for a period of time, the deformation resistance of the workpiece material decreases and the plasticity increases.

Step 2: Groove structure forming

Start the workpiece moving subunit to move the workpiece in the cutting speed direction (+x), and control the tool moving subunit to move the combined tool in the feed direction (-z) to cut the material of the workpiece layer to be processed, wherein the plowing tool first acts on the material of the layer to be cut and exerts a "ploughing and shaping" effect on the material. Due to the high temperature, the workpiece metal softens, and the metal can smoothly flow into the forming channel in the plowing tool, and then be squeezed and shaped by the side wall of the channel to form a continuous groove structure similar to the shape of the channel;

Step 3: Waveform structure forming

The cutting layer metal of the above-mentioned groove structure enters the cutting zone, and the cutting tool has two effects on the cutting layer metal: first, the cutting tool cuts the bottom of the cutting layer metal to separate it from the workpiece body to form a continuous strip; second, the cutting tool forces the upper groove structure to shear, stack, and fold, resulting in the groove structure being transformed into a corrugated structure. The "cutting and separation" and "stacking and folding" of the groove structure by the cutting tool are parallel forming processes, resulting in a three-dimensional metal fin with a corrugated structure on the top and a continuous strip on the bottom.

Step 4: Fin Collection

The prepared continuous fins with corrugated structure pass through a collecting unit, and the fin products are transferred and collected by a product conveying table and a collecting box.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the existing microstructure fin preparation technology, the bottom structure thickness of the grooved fin prepared by the extrusion cutting forming technology is relatively large, the depth-to-width ratio of the fin structure is relatively small, and the material utilization rate is not high; and although the plowing extrusion cutting forming technology effectively reduces the bottom thickness ratio and increases the depth-to-width ratio of the fin structure, it can only prepare two-dimensional grooved fins. The device described in the present invention realizes a series of processes from fin preparation to collection, and the prepared corrugated structure fin has a large aspect ratio, richer structure and larger specific surface area. These characteristics will significantly increase the turbulence effect and improve the heat transfer efficiency;

2. In the present invention, the method can be used to cut the end face of a block workpiece. When the workpiece moves in the cutting direction, the combined tool in the device is used for cutting, and multiple parallel continuous groove structures are plowed on the surface to be processed of the workpiece. The material between the grooves forms a continuous groove structure due to the "ploughing and shaping" effect of the plow cutter. The groove structure and the bottom of the metal layer to be cut are cut and separated from the workpiece substrate by the cutting tool. The fin of the groove structure is formed into a wave shape in the cutting area due to the "stacking and folding" principle, and the bottom of the groove structure is formed into a continuous strip material due to the "cutting and separation" principle. The three-dimensional fin with a wave structure on the surface and a strip-shaped bottom is manufactured by the cutting tool. The processing principle is ingenious and innovative, the method is simple and efficient, and can be directly used on a general three-axis mobile platform. It has strong adaptability, low cost and significant effect.

3. The formation mechanism of the corrugated fins in the present invention is unique and novel. The combined tool in the device can realize the conversion from the grooved fin to the corrugated fin. When the initial fin gradually approaches the tool, its shear stress reaches the yield strength, the metal slides along the shear slip line, and material accumulation occurs in the cutting section. Then, due to the "ploughing and shaping" effect of the plowing tool on the metal material, the workpiece surface is shaped into a groove shape, and then with the "cutting and separation" and "stacking and folding" effects of the cutting edge on the metal cutting layer, a three-dimensional metal fin with a corrugated structure on the top and a continuous strip on the bottom is obtained;

4. The present invention proves the feasibility and high flexibility of the "one-step two-stage" process, which has good potential in the field of heat transfer. In practical applications, the feed speed and cutting speed can be changed according to different production needs, and the tool can be replaced to change the tool rake angle, plowing depth and other parameters, which is suitable for industrial application and promotion;

5. The types of block workpiece materials in the present invention are not limited, and different types of materials such as pure copper, aluminum alloy, magnesium alloy, etc. can be selected. The size of the workpiece can also be selected according to specific needs, which can meet the needs of different industries.

6. The present invention can process the required corrugated fin structure in one step by combining the tool units.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the operation of the main devices in the relevant production line according to the present invention;

FIG2 is an enlarged view of the production area for preparing the corrugated structure fin in FIG1;

Fig. 3 is a left side view of Fig. 1;

FIG4 is an enlarged view of the production area for preparing the corrugated structure fin in FIG3;

FIG5 is a diagram showing a working example of the combined tool unit in the device of the present invention;

FIG6 is a top view of the combined tool unit in the device of the present invention;

Fig. 7 is a cross-sectional view of the A-A section in Fig. 4;

Fig. 8 is a cross-sectional view of the section B-B in Fig. 4;

FIG9 is a schematic diagram of the structure of a tool handle in the combined tool unit of the present invention;

FIG10 is a schematic diagram of the structure of the plowing tool in the combined tool unit of the present invention;

FIG11 is a front view of a plowing tool in the combined tool unit of the present invention;

FIG12 is a schematic diagram of the structure of a cutting tool in the combined tool unit of the present invention;

FIG13 is a schematic diagram of the structure of the collection unit of the present invention;

FIG. 14 is a structural stereogram of a corrugated fin produced by the apparatus of the present invention.

FIG. 15 is a schematic diagram showing the principle of preparing a corrugated structure fin by the combined tool of the present invention.

Numbers in the figure: 100 combined tool unit; 110 tool handle; 111 tool handle seat; 112 tool seat; 113 first positioning hole; 114 second positioning hole; 115 third positioning hole; 116 positioning flange; 120 plowing tool; 121 parallel plow; 122 first positioning through hole; 123 second positioning threaded blind hole; 124 plowing tool block; 130 cutting tool; 131 front face; 132 cutting edge; 133 positioning through hole; 140 gasket; 150 long bolt; 160 nut; 170 short bolt; 180 large Bolt; 200 corrugated fin; 210 corrugated structure; 220 fin bottom; 300 block metal workpiece; 310 fixed through hole; 400 workbench; 410 T-slot; 420 cutting movement device; 500 gantry; 510 gantry support; 520 lateral moving device; 530 longitudinal moving device; 600 induction heating module; 610 induction coil; 620 induction heating power supply; 700 product conveying table; 710 product conveyor belt; 720 motor; 800 collection box; 810 box body; 820 handle.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in FIG. 1 to FIG. 12 , a device for preparing a corrugated structure fin 200 provided by the present invention includes a combined tool unit, a motion unit, a heating unit and a collecting unit.

The motion unit includes a tool moving subunit and a workpiece moving subunit. The combined tool unit 100 is arranged on the tool moving subunit to control the feeding of the tool. The workpiece moving subunit is used to place the workpiece 300 to drive the workpiece to move in the cutting direction.

The combined tool unit 100 includes a tool handle 110 , a plowing tool 120 , and a cutting tool 130 .

The plowing tool 120 includes a plowing tool block 124 and a parallel plow blade 121 fixed on the plowing tool block 124. The plowing tool block 124 is also provided with a first positioning through hole 122 and a second positioning threaded blind hole 123. The plowing tool 120 is used to plow a parallel and continuous groove structure with a certain height on the surface to be processed of a block workpiece.

The tool handle 110 is used to install a fixed tool. The tool handle 110 includes a tool handle seat 111, a tool seat 112, and a positioning flange 116. The tool seat 112 is provided with a first positioning hole 113, the positioning flange 116 is provided with a second positioning hole 114, and the tool handle seat 111 is provided with a third positioning hole 115.

The cutting tool 130 includes a rake face 131 , a cutting edge 132 , and a positioning through hole 133 . The cutting tool 130 is used to cut and separate metal and finally obtain a corrugated structure fin 200 .

In some embodiments of the present invention, as shown in FIGS. 5 to 8 , the combined tool unit 100 is made of high-speed steel W18Cr4V, and the distance between the bottom end of the parallel plow blade 121 and the top end of the cutting edge 132 is set to 0.1 mm, that is, the thickness to be cut at the bottom of the groove structure is 0.1 mm, and the height of the groove for accommodating the fin (the groove is the gap between the parallel plow blades, and the material is plowed to form a groove structure and passes through the parallel plow blades) is set to 1.0 mm, so as to reserve a suitable height for the manufactured fin, so as to ensure that the workpiece material can fully fill the groove structure. The plow tool 120 is provided with two first positioning through holes 122 and four second positioning threaded blind holes 123 to ensure the positioning accuracy between the plow tool 120 and the tool handle 110 and increase the rigidity of the plow tool 120; the tool handle 110 is provided with two positioning flanges 116 to facilitate placing a gasket 140 between the tool handle 110 and the cutting tool 130, and adjusting the relative distance between the bottom end of the plow tool 121 and the top end of the cutting edge 133 to change the thickness of the strip at the bottom 220 of the fin.

In some embodiments of the present invention, as shown in FIG. 9 , three third positioning holes 115 are provided on the tool holder seat 111 for installation and positioning of the combined tool unit 100 and the gantry 500 , and are also suitable for clamping of various machine tools.

In some embodiments of the present invention, as shown in FIG. 10 and FIG. 11 , there are multiple parallel plow blades 121 provided on the plowing tool 120, and these parallel plow blades 121 are arranged at equal intervals, and gaps are left between adjacent parallel plow blades 121 to form a forming channel. In order to prevent the parallel plow blades 121 from deforming and breaking, each parallel plow blade 121 is designed to be bilaterally symmetrical. Preferably, the geometric parameters of the plowing tool 120 are set as follows: the plow blade inclination angle is 30°, the plowing forming angle is 30°, the extrusion forming angle is 0°, the extrusion gap angle is 0°, the width of a single parallel plow blade 121 is 0.4 mm, the height is 1.0 mm, and the gap between adjacent parallel plow blades 121 is 0.4 mm. It can be understood that these specific values are only a specific example of the corresponding parameters and do not constitute a limitation on the scope of protection.

In some embodiments of the present invention, as shown in FIG. 12 , the cutting tool 130 is provided with two positioning through holes 133, which cooperate with the first positioning hole 122 of the plowing tool 120 for installation and removal of the tool. When installing the tool, the long bolt 150 is passed through the positioning hole and then tightened with a nut. When the parameters such as the front angle of the tool need to be changed, only the tool needs to be changed. Preferably, the front angle of the tool is selected to be 20°, the back angle is 5°, the blade radius is 0mm, the plowing depth is 0.59mm, and the distance in the x direction between the tail of the plow 121 and the cutting edge 133 is 6.0mm. It can be understood that these specific values are only a specific example of the corresponding parameters and do not constitute a limitation on the scope of protection.

The motion unit controls the feeding and cutting direction movement, wherein the tool moving subunit includes a gantry 500, and the gantry 500 is used to fix and control the feeding direction movement of the combined tool unit 100, including a gantry support 510, a lateral moving device 520 arranged laterally on the gantry support 510, and a longitudinal moving device 530 arranged on the lateral moving device 520, and the combined tool unit 100 is fixedly connected to the longitudinal moving device 530. The longitudinal moving device 530 can reciprocate in the y direction under the drive of the lateral moving device 520, and the longitudinal moving device 530 can drive the combined tool unit 100 to move in the z direction. The longitudinal moving device 530 and the lateral moving device 520 can be implemented by existing moving mechanisms, such as a screw slider, etc., which will not be described in detail here.

The workpiece moving subunit is used to fix the workpiece 300 and control the movement of the workpiece in the cutting direction. The workpiece moving subunit includes a workbench 400, a cutting motion device 420 and a T-slot 410 arranged on the workbench 400. In some embodiments of the present invention, the cutting motion device 420 includes a cutting motion motor and a ball screw mechanism driven by the cutting motion motor. The workbench 400 is connected to the ball screw mechanism. The cutting motion motor works to drive the ball screw mechanism to rotate, thereby driving the workbench 400 to move. The T-slot 410 moves with the movement of the workbench 400, thereby driving the workpiece 300 fixed on the T-slot 410 to move in the feeding and cutting directions.

The heating unit, i.e., the induction heating module 600, includes an induction coil 610 and an induction heating power supply 620 connected to the induction coil 610. The induction coil 610 is connected to the induction heating power supply 620. The axis around which the induction coil 610 is wound is perpendicular to the side of the workpiece and is located below the entrance of the plowing tool 120. The purpose is to heat the workpiece 300 that is about to be subjected to the plowing effect.

As shown in FIG13 , the collection unit includes a product conveying table 700 and a collection box 800 disposed at the outlet end of the product conveying table 700. The product conveying table 700 includes a motor 720 and a product conveyor belt 710 driven by the motor 720, which is used to transfer the corrugated structure fins 200 to the collection box 800. The collection box 800 includes a box body 810 and a handle 820 disposed on the box body 810, which is used to collect and transport the corrugated structure fins 200.

The formation mechanism of the corrugated metal fins in the present invention is unique and novel. The combined tool unit 100 in the device can realize the conversion from the cutting section to the corrugated fin, which includes two forming processes, namely, the groove structure forming and the corrugated structure forming. The metal surface is first formed into a parallel and continuous groove structure with a certain height through the "ploughing shaping" principle, and then the corrugated structure is formed through the "stacking folding" principle. The bottom of the metal is formed into a continuous strip through the "cutting and separation" principle, and a three-dimensional metal fin with a corrugated structure on the top and a continuous strip on the bottom is obtained.

As shown in FIGS. 1 to 4 , the present invention also provides a method for preparing a corrugated metal fin using the above-mentioned device, as shown in FIG. 15 , which is carried out according to the following steps:

Step 1: Workpiece heating

The induction heating power supply 620 is started and the heating temperature is set to a preset temperature (the preset temperature is determined according to the actual workpiece size. When the workpiece is large, the temperature needs to be increased in order to quickly heat up and improve the plasticity of the material. When the workpiece is small, the temperature can be appropriately reduced in order to reduce power consumption. In some embodiments of the present invention, the preset temperature is 500° C.), and then the temperature of the part of the workpiece 300 acted upon by the induction coil 610 rises due to electromagnetic induction, the deformation resistance of the workpiece material is reduced, and the plasticity is improved;

Step 2: Groove structure forming

Start the workbench to move the workpiece in the cutting speed direction +x, and at the same time control the gantry 500 to move the combined tool unit 100 along the feed direction -z, so that the combined tool unit 100 and the workpiece 300 are in a suitable position in the vertical direction, which can not only cut the desired material, but also will not cut too deep to cause damage to the tool, and cut the material of the layer to be processed of the workpiece, wherein the plowing tool 120 first acts on the material of the layer to be cut, and exerts a "plowing and shaping" effect on the material. Due to the high temperature, the workpiece metal softens, and the metal can smoothly flow into the forming channel in the plowing tool 120 (that is, the gap left between the parallel plow blades (the material is plowed into the gap between the parallel plow blades to form a groove structure), and then is squeezed and shaped by the side wall of the channel to form a continuous groove structure similar to the shape of the channel;

Step 3: Waveform structure forming

The cutting layer metal of the above-mentioned groove structure enters the cutting zone, and the cutting tool 130 has two effects on the cutting layer metal: first, the cutting tool 130 cuts the bottom of the cutting layer metal to separate it from the workpiece body to form a continuous strip; second, the cutting tool 130 forces the upper groove structure to shear, stack, and fold, resulting in the groove structure being transformed into a corrugated structure. The "cutting and separation" and "stacking and folding" of the groove structure by the cutting tool 130 are parallel forming processes, resulting in a three-dimensional metal fin with a corrugated structure on the top and a continuous strip on the bottom.

Step 4: Fin Collection

The prepared continuous fins with corrugated structure pass through a collecting unit, and the fin products are transferred and collected by a product conveying table 700 and a collecting box 800 .

In some embodiments of the present invention, the workpiece 300 has flanges on both sides, and the flanges are provided with fixing through holes 310, which cooperate with the T-slots 410 on the workbench 400 (i.e., an inverted bolt is used, the bolt head is stuck in the T-slot, the other end passes through the fixing through hole on the flange, and then fixed by a nut) to achieve the function of fixing the workpiece 300. Therefore, as long as the workpiece has the fixing through hole 310, the workpiece 300 can be easily installed on the workbench 400, and the size of the workpiece 300 can be selected according to specific needs. In addition, the type of workpiece material is not limited, and different types of metals such as pure copper, aluminum alloy, and magnesium alloy can be selected.

In some of the embodiments of the present invention, pure copper C10200 with a length, width and height of 200mm*60mm*80mm is selected as a block workpiece, and a gantry machining center is used for dry cutting. The position of the parallel plow blade 121 on the plowing tool 120 is 0.4-0.72mm away from the upper surface of the workpiece 300, the position of the cutting edge 133 of the cutting tool 130 is 0.1-0.3mm away from the lower surface of the parallel plow blade 121, and the cutting direction is parallel to the 200mm side of the workpiece -x. The prepared corrugated structure fin 200 has a width of 60mm; the combined tool unit 100 fixed on the gantry 500 is controlled to control the feed direction by adjusting the lateral motion device 520 and the longitudinal motion device 530 of the gantry 500. movement in the direction of the product conveying platform 700; the height of the product conveying platform 700 is slightly lower than the corrugated structure fin 200. When the workbench 400 completes a cutting process, that is, the cutting layer on the upper surface of the block metal workpiece 300 is removed, the corrugated structure fin 200 will be automatically cut off and then fall onto the product conveyor belt 710; the edge height of the box body 810 of the collecting box 800 should be lower than the product conveying platform 700, which is conducive to the corrugated structure fin 200 being transferred to the end of the product conveyor belt 710 and falling into the collecting box under the influence of gravity, thereby completing the automatic collection of the product.

In some embodiments of the present invention, the cutting speed in the +x direction is 30-120 m/min, the cutting depth of the combined tool unit 100 is 0.40-0.72 mm, the prepared corrugated structure fin 200 has a full height range of about 3 mm, the thickness of the fin bottom 220 is about 1.6 mm, the gap between adjacent corrugated structures is 0.4 mm, and the fin width is about 60 mm; it can be seen that the corrugated structure fin 200 prepared by this method has a large aspect ratio and a larger specific surface area. These better properties will significantly increase the turbulence effect and improve the heat transfer efficiency. The structure is continuous, the fin surface is complete, the wear resistance is strong, and the mechanical strength is high, as shown in Figure 14.

In this embodiment, the method can be used to cut the end face of a block metal workpiece 300. The workpiece is fixed on a workbench 400. When the workbench moves in the cutting direction +x, the combined tool unit 100 fixed on the gantry 500 performs "ploughing and shaping", "stacking and folding" and "cutting and separating" on the workpiece, and plows a plurality of parallel continuous groove structures on the surface to be processed of the workpiece. The material between the grooves forms a continuous groove structure due to the "ploughing and shaping" effect of the parallel plow cutters 121. The groove structure together with the material to be cut at the bottom is cut and separated from the workpiece substrate by the cutting tool 130. The groove structure is formed into a corrugated morphology in the cutting area due to the "stacking and folding" principle, and the material to be cut at the bottom of the groove structure is formed into a continuous strip due to the "cutting and separating" principle. The three-dimensional corrugated fin 200 with a corrugated structure on the top and a continuous strip on the bottom is manufactured by the cutting tool 130. The processing principle is ingenious and innovative, the method is simple and efficient, and can be directly used in general machine tools. It has strong adaptability, low cost and significant effect.

In summary, the present invention can not only successfully prepare the corrugated structure fin 200, but also has a simple and efficient method, a flexible device, and can be industrialized and promoted for application.

In addition, the various parameters used in the above embodiments are for reference only. Relevant technical personnel familiar with the field may make corresponding adjustments and changes according to specific needs to achieve the purpose of different products, but these adjustments and changes are all within the scope of the claims of this application.

Claims (8)

1. A device for preparing corrugated metal fins, characterized in that it comprises a motion unit, a heating unit, a combined tool unit and a collecting unit, The motion unit comprises a tool moving subunit and a workpiece moving subunit, the combined tool unit (100) is arranged on the tool moving subunit to control the feeding of the tool, and the workpiece moving subunit is used to place a workpiece (300) to drive the workpiece to move in a cutting direction; The heating unit is used to heat the workpiece (300); The combined tool unit (100) comprises a tool handle (110), a plowing tool (120), and a cutting tool (130); the tool handle (110) is used to mount a fixed tool; the tool handle (110) comprises a tool handle seat (111), a tool seat (112), and a positioning flange (116); the tool handle seat (111) is connected to the motion unit; the tool seat (112) and the positioning flange (116) are both connected to the tool handle seat (111); the plowing tool (120) is used to plow a parallel and continuous groove structure having a certain height on a surface to be processed of a workpiece; The extrusion tool (120) is arranged on the tool holder (112), the extrusion tool (120) comprises a ploughing tool block (124) and parallel plow blades (121) arranged on the ploughing tool block (124), there are a plurality of parallel plow blades (121), and gaps are left between adjacent parallel plow blades (121) as forming channels; the cutting tool (130) is arranged on the extrusion tool (120), the cutting tool (130) comprises a front blade surface (131) and a cutting edge (132), and is used for cutting the cutting layer metal of the groove structure and finally obtaining the corrugated structure fin (200); The collecting unit is used to collect the processed corrugated structure fins (200); The tool moving subunit comprises a gantry (500), the gantry (500) comprises a gantry support column (510), a transverse moving device (520) and a longitudinal moving device (530), the transverse moving device (520) is arranged transversely on the gantry support column (510), the longitudinal moving device (530) is arranged on the transverse moving device (520), and the combined tool unit (100) is arranged on the longitudinal moving device (530) to fix and control the movement of the combined tool unit (100) in the feeding direction; The workpiece moving subunit comprises a worktable (400), the worktable (400) is located below the combined tool unit (100) and the worktable (400) is movable in a cutting direction, the workpiece (300) is arranged on the worktable (400), and the movement of the workpiece (300) in the cutting direction is fixed and controlled by the worktable (400); A gasket (140) is also provided between the positioning flange (116) of the tool handle (110) and the cutting tool (130) to change the cutting depth; at the same time, a gasket (140) is also provided between the plowing tool (120) and the cutting tool (130) to adjust the relative position between the plowing tool (120) and the cutting tool (130). 2. A device for preparing a corrugated metal fin according to claim 1, characterized in that the workpiece (300) has flanges on both sides, the flanges are provided with fixing through holes (310), and the workbench (400) is provided with T-slots (410), and the workpiece (300) is fixed by the cooperation of fasteners, the fixing through holes (310) and the T-slots (410). 3. A device for preparing a corrugated metal fin according to claim 1, characterized in that the heating unit is an induction heating module (600), comprising an induction coil (610) and an induction heating power supply (620) connected to the induction coil (610), and the induction coil (610) is located below the entrance of the plowing tool (120) and is used to heat the workpiece (300). 4. A device for preparing corrugated metal fins according to claim 1, characterized in that the collection unit comprises a product conveying table (700) and a collection box (800), and the product conveying table (700) is used to transport the processed corrugated metal fins (200) to the collection box (800). 5. A device for preparing a corrugated metal fin according to claim 4, characterized in that the product conveying table (700) comprises a motor (720) and a product conveying belt (710) driven by the motor (720) and the motor (720). 6. The device for preparing a corrugated metal fin according to claim 1, characterized in that the plowing tool (120) is provided with two first positioning through holes (122) which cooperate with two first positioning holes (113) provided on the tool handle (110); The plowing tool (120) is also provided with a second positioning threaded blind hole (123) which cooperates with a second positioning hole (114) provided on the tool handle (110); The cutting tool (130) is provided with a mounting through hole (133) which cooperates with a first positioning through hole (122) provided on the plowing tool (120); The tool handle seat (111) is provided with a third positioning hole (115) for mounting and positioning the combined tool unit (100) and the motion unit. 7. A device for preparing corrugated metal fins according to any one of claims 1 to 6, characterized in that the distance between the tail of the parallel plowshare (121) and the cutting edge (132) is set to 6.0-10.0 mm, and the height of the gap between the parallel plowshares (121) accommodating the fins is set to 1.0-2.0 mm. 8. A method for preparing a corrugated metal fin, characterized in that the device according to any one of claims 1 to 7 is used, and the method comprises the following steps: Step 1: Workpiece heating The heating unit is started and a preset temperature is set to be heated, and then the temperature of the part of the workpiece (300) affected by the heating unit rises. When the temperature reaches the preset temperature and is kept warm for a period of time, the deformation resistance of the workpiece material is reduced and the plasticity is improved; Step 2: Groove structure forming The workpiece moving subunit is started to move the workpiece in the direction of the cutting speed, and at the same time, the tool moving subunit is controlled to move the combined tool unit (100) in the feed direction to cut the material of the layer to be processed of the workpiece, wherein the plowing tool (120) first acts on the material of the layer to be cut and applies a "ploughing and shaping" effect to the material. Due to the high temperature, the metal of the workpiece is softened, and the metal can smoothly flow into the forming channel in the plowing tool (120), and then be squeezed and shaped by the side wall of the channel to form a continuous groove structure similar to the shape of the forming channel; Step 3: Waveform structure forming The cutting layer metal of the groove structure enters the cutting zone, and the cutting tool (130) has two effects on the cutting layer metal: first, the cutting tool (130) cuts the bottom of the cutting layer metal to separate it from the workpiece body to form a continuous strip; second, the cutting tool (130) forces the upper groove structure to undergo shearing, stacking, and folding, resulting in the groove structure being transformed into a corrugated structure; the "cutting and separation" and "stacking and folding" of the groove structure by the cutting tool (130) are parallel forming processes, resulting in a three-dimensional corrugated structure fin (200) with a corrugated structure on the top and a continuous strip on the bottom; Step 4: Fin Collection The prepared continuous corrugated structure fins (200) are transferred and collected through a collecting unit.