CN116000333A - Device for preparing metal fin with wave structure and preparation method thereof - Google Patents

Abstract

The invention discloses a device for preparing metal fins with a corrugated structure and a preparation method thereof. The preparation method includes three processes in succession, one is heating a workpiece, the other is forming a groove structure, and the third is forming a corrugated structure. The metal workpiece is softened by heating. The metal surface is first "ploughed and shaped" into a groove-shaped structure by plowing the extruding tool. Through the cutting tool, the groove structure is "stacked and folded" into a wave structure, and at the same time, the wave structure together with part of the matrix is cut and separated from the workpiece body. A three-dimensional finned strip material with a continuous strip at the bottom and a corrugated top can be prepared through the above process. The invention not only can successfully prepare metal fins with a corrugated structure, but also has a simple and efficient method, a flexible device, and can be popularized and applied industrially.

Description

A device for preparing corrugated structure metal fins and its preparation method

technical field

The invention relates to the technical field of metal fin manufacturing, in particular 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 as well as industrial electronics products. The heat generated by the electronics is transferred to a fluid that can be blown or pumped away to maintain an operating temperature that is conducive to the performance of the device, thereby maintaining the reliability of the electronic system.

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

At present, the common fin structures on the market are relatively simple, such as straight fins and louver fins, and the size and spacing of the fins are at the millimeter level. However, with the rapid development of the manufacturing process and microelectronics technology, the volume of the chip is getting smaller and higher, and the integration level is getting higher and higher. The ordinary cooling method can no longer meet the heat dissipation requirements of the highly integrated chip, which will lead to internal components. Heat accumulation affects the normal use and performance of electronic products and shortens their service life. Therefore, a simple two-dimensional structure is difficult to meet higher heat transfer and convection conditions, which has become a major limitation for the development of this type of technology. Considering the cost and difficulty of research, the research and development of fin structure 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 dissipation fins.

When designing a cooling fin structure, the main considerations are its heat transfer performance and resistance to 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, and these structures have various geometric shapes, such as cylindrical pin-shaped fins, strip-shaped fins and plates. shaped fins. Compared with traditional flat fins, three-dimensional metal fins have higher heat transfer efficiency due to their complex surface and large specific surface area. However, limited by its complex structure and tiny size, the fabrication of complex three-dimensional structures is quite difficult.

So far, researchers have used additive manufacturing, die-casting, sintering, laser machining, and electrical discharge machining (EDM) to prepare fins with different three-dimensional structures. However, additive manufacturing needs to rely on lasers to melt metal powder, which is limited. Due to the development of laser technology, the thickness of a single laser sintered layer is relatively thin. To prepare a three-dimensional fin with a complete shape, multi-layer sintering is required, which consumes time and increases the cost; die-casting is suitable for large-sized and simple-structured fins. Fin manufacturing, however, for more and more integrated electronic devices, the heat dissipation contact area is limited, so in order to make full use of space, fins tend to be small in size and have complex structures, and die-casting technology is difficult to achieve; although some researchers Micron-scale three-dimensional structures are prepared by sintering technology, but the manufacturing process requires multiple sinterings and molds with different 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 complicated processing technology. Moreover, a large number of studies have shown that the corrugated fin pair has a better heat dissipation effect than the straight fin. Therefore, it is a realistic and urgent need to propose a simple and efficient method for preparing corrugated fins and develop a corresponding preparation device.

The common fin processing method is the selective laser melting processing method. Although this method is fast, it still needs 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.

Contents of the invention

The present invention aims at solving one of the technical problems existing in the prior art at least to a certain extent. To this end, a first object of the present invention is to propose a device for producing metal fins of corrugated structure.

Another object of the present invention is to propose a method for preparing metal fins with a corrugated structure, in order to improve the heat transfer performance of the fins and be suitable for industrial application and promotion.

In order to achieve the aforementioned first purpose, the present invention provides a device for preparing metal fins with a wave structure, including a movement unit, a heating unit, a combination cutter unit and a collection unit,

The motion unit includes 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. The workpiece moving subunit is used to place the workpiece to drive the workpiece in the cutting direction exercise;

The combined tool unit includes a knife handle, a plowing tool, and a cutting tool. The knife handle is used to install a fixed tool. The knife handle includes a knife handle seat, a knife seat and a positioning flange. The knife handle seat is connected with the motion unit, and the knife seat and the positioning flange are all connected with the handle seat; the plow extruding tool is used to plow out a parallel and continuous groove structure with a certain height on the surface to be processed of the workpiece, the plow extruding tool is arranged on the tool seat, and the plow extruding tool The tool includes a plow cutting tool block and parallel coulters arranged on the plow cutting tool block. There are multiple parallel coulters, and a gap is left between adjacent parallel coulters as a forming channel; the cutting tool is arranged on the plow extruding tool, and the cutting tool The tool consists of a rake face and a cutting edge, which is used to cut the separated metal and finally make the fin with wave structure;

The collecting unit is used for collecting the processed fins of the corrugated structure.

Preferably, the tool moving subunit includes a gantry frame, and the gantry frame includes a gantry pillar, a lateral movement device and a longitudinal movement device, the transverse movement device is horizontally arranged on the gantry pillar, and the longitudinal movement device is arranged on the transverse movement device. The cutter unit is arranged on the longitudinal moving device, which fixes and controls the movement of the combined cutter unit in the feeding direction, and controls the feeding direction (z-axis) and plowing depth of the combined cutter through the longitudinal feeding device.

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

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

The workpiece is a massive 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 for heating the workpiece.

Preferably, the collection unit includes a product transfer table and a collection box, and the product transfer table is used for transporting the processed corrugated fins to the collection box.

Preferably, the product conveyor table includes a motor and a product conveyor belt and motor driven by the motor. The collection box consists of a box body and a handle for collecting and transporting corrugated fins.

Preferably, the plow extruding tool is provided with two first positioning through holes, which cooperate with the two first positioning holes provided on the handle; The set second positioning hole fits;

The cutting tool is provided with an installation through hole, which cooperates with the first positioning hole provided on the plowing tool, and is used for the installation and removal of the tool. When installing the tool, pass the long bolt (150) through the positioning hole, and then tighten it with a nut. When you want to change the parameters such as the rake angle of the tool, you only need to change the tool;

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

Preferably, a spacer is also arranged between the positioning flange of the handle and the cutting tool to change the depth of cut; meanwhile, a spacer is also arranged between the plowing tool and the cutting tool to adjust the distance between the plowing tool and the cutting tool. relative position between them.

Preferably, the distance between the tails of the parallel coulters and the cutting edge is set to 6.0-10.0 mm, and the height of the gap between the parallel coulters that accommodate the fins is set to 1.0-2.0 mm to reserve a suitable channel for the fins , it is necessary to ensure that the channel of the plow extrusion tool is not blocked by material accumulation during cutting, and it is also necessary to give full play to the role of "plough cutting and shaping" to promote the formation of groove-shaped structures.

Preferably, the coulter is composed of a plurality of parallel coulters, and these parallel coulters are arranged at equal intervals. In order to prevent the coulters from being deformed and broken, each coulter is bilaterally symmetrical.

In order to achieve another purpose of the foregoing invention, a method for preparing a corrugated metal fin provided by the invention is characterized in that it proceeds as follows:

Step 1, workpiece heating

Start the heating unit and set the preset temperature that needs to be heated, then the temperature of the part of the workpiece affected by the heating unit will rise. When the temperature reaches the preset temperature and keep it warm for a period of time, the deformation resistance of the workpiece material will decrease and the plasticity will increase;

Step 2. Forming the trough structure

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

Step 3. Forming the waveform structure

The metal of the cutting layer with the above-mentioned trough structure enters the cutting area, and the cutting tool has two effects on the metal of the cutting layer: one is that the cutting tool cuts the bottom of the metal of the cutting layer to separate it from the workpiece body to form a continuous strip; the other is that the cutting tool The upper trough structure is forced to shear, accumulate, and fold, and the result is that the trough structure transforms into a wave structure. The "cutting and separating" and "stacking and folding" of the grooved structure by the cutting tool are parallel forming processes, resulting in a three-dimensional metal fin with a corrugated structure at the top and a continuous strip at the bottom.

Step 4. Fin Collection

The prepared continuous fins with corrugated structure pass through the collection unit, and the fin products are transferred and collected by the product transfer platform and the collection box.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

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

2. In the present invention, the method can be used to cut the end face of the block workpiece, and when the workpiece moves in the cutting direction, the combined tool in the device is used to cut, and a plurality of parallel blades are plowed out on the surface to be processed of the workpiece. Continuous trough-shaped structure, the material between the troughs forms a continuous trough-shaped structure due to the "plough cutting and shaping" effect of the coulter, and the trough-shaped structure and the metal bottom of the layer to be cut are cut and separated from the workpiece substrate by the cutting tool. The trough-shaped structure fins form a wave shape due to the principle of "stacking and folding" in the cutting area, and the bottom of the trough-shaped structure forms a continuous strip due to the principle of "cutting and separation". The surface is wave-shaped and the bottom is strip-shaped by cutting tools. The three-dimensional fins, the processing principle is ingenious and innovative, the method is simple and efficient, and can be directly applied to the general three-axis mobile platform, with strong adaptability, low cost and remarkable effect;

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

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 requirements, and also The tool can be replaced to change the rake angle, plowing depth and other parameters to adapt to 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, and magnesium alloy can be selected, and the size of the workpiece can also be selected according to specific needs, which can adapt to the needs of different industries.

6. The present invention can process the required corrugated fins in one step by combining the cutter unit.

Description of drawings

Fig. 1 is that the present invention relates to the working schematic diagram of main device in relevant production line;

Figure 2 is an enlarged view of the production area for preparing corrugated fins in Figure 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is an enlarged view of the production area for preparing corrugated fins in Fig. 3;

Fig. 5 is the working example diagram of combined cutter unit in the device of the present invention;

Fig. 6 is the top view of the combined cutter unit in the device of the present invention;

Fig. 7 is the sectional view of A-A section among Fig. 4;

Fig. 8 is the sectional view of B-B section among Fig. 4;

Fig. 9 is a schematic diagram of the structure of the tool handle in the combined tool unit of the present invention;

Fig. 10 is a structural schematic diagram of the plow extruding tool in the combined tool unit of the present invention;

Fig. 11 is a front view of the plowing cutter in the combined cutter unit of the present invention;

Fig. 12 is a schematic structural view of the cutting tool in the combined tool unit of the present invention;

Fig. 13 is a schematic structural view of the collection unit of the present invention;

Fig. 14 is a structural perspective view of the corrugated fins prepared by the device of the present invention.

Fig. 15 is a schematic diagram of the principle of preparing fins with a wave structure by the combined tool of the present invention.

Symbols 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 plow extruding tool; 121 parallel coulter; 122 first positioning through hole; 123 second positioning threaded blind hole; 124 plow cutter block; 130 cutting tool; 131 rake face; 132 cutting edge; 133 positioning through hole; 140 spacer; 150 long Bolt; 160 nut; 170 short bolt; 180 large bolt; 200 wave structure fin; 210 wave structure; 220 fin bottom; 300 block metal workpiece; 310 fixed through hole; 400 table; Device; 500 gantry frame; 510 gantry pillar; 520 horizontal moving device; 530 vertical moving device; 600 induction heating module; 610 induction coil; 620 induction heating power supply; ; 810 box; 820 handle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts are within the protection scope of the present invention.

As shown in FIGS. 1 to 12 , the present invention provides a device for preparing fins 200 with a corrugated structure, which includes a combined cutter unit, a moving 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 a workpiece 300 to drive the workpiece during cutting. movement in direction;

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

The plow cutter 120 includes a plow cutter block 124 and a parallel coulter 121 fixed on the plow cutter block 124 , and a first positioning through hole 122 and a second positioning screw blind hole 123 are opened on the plow cutter block 124 . The plowing tool 120 is used to plow out a parallel continuous groove-shaped structure with a certain height on the surface to be processed of the block workpiece.

The handle of a knife 110 is used for installing the fixed tool, and the handle of a knife 110 comprises a handle of a knife 111, a knife seat 112, a positioning flange 116, and the knife seat 112 is provided with a first positioning hole 113, and the positioning flange 116 is provided with a second positioning hole 113. The positioning hole 114 is provided with a third positioning hole 115 on the handle seat 111 .

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 the separated metal and finally produce the corrugated structure fin 200 .

In some of the embodiments of the present invention, as shown in FIGS. 5 to 8 , the combined cutter unit 100 is made of high-speed steel W18Cr4V, and the distance between the bottom end of the parallel coulter 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 trough-shaped structure is 0.1mm, and the slots that accommodate the fins (the slots are the gaps left between the parallel coulters, the material is plowed to form a trough-shaped structure, from between the parallel coulters The height of passing through) is set to 1.0mm, and an appropriate height is reserved for the manufactured fins, which not only ensures that the workpiece material can fully fill the groove-shaped passage, but also prevents the passage from being too small to cause material accumulation to block the passage; the plow extruding 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 extruding tool 120 and the handle 110 and to increase the rigidity of the plow extruding tool 120; the handle 110 Two locating flanges 116 are provided on the top, which is convenient to place a spacer 140 between the handle 110 and the cutting tool 130, and adjust the relative distance between the bottom end of the coulter 121 and the top end of the cutting edge 133 to change the fin bottom. 220 strip thickness.

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

In some of the embodiments of the present invention, as shown in Figure 10 and Figure 11, there are multiple parallel coulters 121 arranged on the plow extruding tool 120, and these parallel coulters 121 are arranged at equal intervals, and adjacent parallel plows A gap is left between the knives 121 to form a shaped channel. In order to prevent the parallel coulters 121 from being deformed and broken, each parallel coulter 121 is designed to be bilaterally symmetrical. Preferably, the geometric parameters of the plow extruding tool 120 are set as follows: the inclination angle of the plow blade is 30°, the plow forming angle is 30°, the extrusion forming angle is 0°, the extrusion gap angle is 0°, the single parallel coulter 121 The width is 0.4mm, the height is 1.0mm, and the gap between adjacent parallel coulters 121 is 0.4mm. It can be understood that these specific values are just a specific example of the corresponding parameters and do not constitute a limitation on the scope of protection.

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

The movement unit controls the movement in the feeding and cutting directions, wherein the tool moving subunit includes a gantry frame 500, which is used to fix and control the movement of the combined tool unit 100 in the direction of feeding, including a gantry pillar 510, a lateral The horizontal moving device 520 arranged on the gantry pillar 510 , the longitudinal moving device 530 arranged on the horizontal moving device 520 , and the combined cutter unit 100 is fixedly connected with the longitudinal moving device 530 . The vertical moving device 530 can move back and forth in the y direction driven by the horizontal moving device 520 , and the vertical 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 using existing moving mechanisms, such as screw rod sliders, 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 worktable 400, a cutting motion device 420 and a T-shaped slot 410 arranged on the worktable 400, wherein , in some of the 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 worktable 400 is connected with the ball screw mechanism, and the cutting motion motor works to drive the ball screw The mechanism rotates to work, and then drives the worktable 400 to move, and the T-shaped slot 410 moves with the movement of the worktable 400, and then drives the workpiece 300 fixed on the T-shaped slot 410 to move in the direction of feeding and cutting.

The heating unit, that is, 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 surrounded by the induction coil 610 is perpendicular to the side of the workpiece and is located on the side of the plow. Below the entrance of the extruding tool 120, the purpose is to heat the workpiece 300 that is about to be plowed and extruded.

As shown in FIG. 13 , the collection unit includes a product delivery platform 700 and a collection box 800 disposed at the exit end of the product delivery platform 700 . The product transfer table 700 includes a motor 720 and a product transfer belt 710 driven by the motor 720 for transferring 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 for collecting and transporting 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 fins, including two forming processes before and after, namely, the formation of the groove structure and the corrugated structure take shape. The metal surface is first formed into a parallel continuous groove-shaped structure with a certain height through the principle of "plough cutting and shaping", and then the wave structure is formed through the principle of "stacking and folding", and the metal bottom is formed into a continuous strip through the principle of "cutting and separation", resulting in Three-dimensional metal fins with a corrugated structure at the top and a continuous strip at the bottom.

As shown in Figures 1 to 4, the present invention also provides a method for preparing metal fins with a corrugated structure by using the aforementioned device, as shown in Figure 15, which is carried out in the following steps:

Step 1, workpiece heating

Start the induction heating power supply 620 and set the heating temperature as the preset temperature (the preset temperature is determined according to the actual workpiece size. The power consumption and temperature can be appropriately reduced. In some embodiments of the present invention, the preset temperature is 500° C.), and then the temperature of the part of the workpiece 300 affected by the induction coil 610 increases due to electromagnetic induction, and the deformation resistance of the workpiece material Decrease, improve plasticity;

Step 2. Forming the trough structure

Start the workbench to move the workpiece to 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. position, which can not only cut the desired material, but also not cut too deep, causing damage to the tool, and cut the material of the workpiece layer to be processed, wherein the plow extrusion tool 120 first acts on the material of the layer to be cut, and exerts pressure on the material. The "plough cutting and shaping" effect. Because the high temperature softens the metal of the workpiece, the metal can smoothly flow into the forming channel in the plow extruding tool 120 (that is, the gap left between the parallel coulters (the material is squeezed into the gap between the parallel coulters to form a groove-shaped structure), and then A continuous groove-shaped structure similar to the shape of the channel is formed by the extrusion and shaping effect of the side wall of the channel;

Step 3. Forming the waveform structure

The cutting layer metal of the above-mentioned groove structure enters the cutting area, and the cutting tool 130 has two effects on the cutting layer metal: one is that the cutting tool 130 cuts the bottom of the cutting layer metal to separate it from the workpiece body to form a continuous strip; The cutting tool 130 forces the upper flute structure to shear, pack, and fold, with the result that the flute structure transforms into a corrugated structure. The "cutting and separating" 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 at the top and a continuous strip at the bottom.

Step 4. Fin Collection

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

In some of the embodiments of the present invention, there are flanges on both sides of the workpiece 300, and the flanges are provided with fixing through holes 310, which cooperate with the T-shaped slots 410 on the workbench 400 (that is, using inverted bolts, bolt heads stuck in the T-shaped slot, the other end passes through the fixing through hole on the flange, and then fixed by a nut) to fix the workpiece 300, so as long as the workpiece has a fixing through hole 310, the workpiece 300 can be easily installed in the work On the stage 400, the size of the workpiece 300 can be selected according to specific requirements. 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 under dry cutting conditions. The distance between the position of the parallel coulter 121 on the plow extruding tool 120 and the upper surface of the workpiece 300 is 0.4-0.72 mm, the distance between the position of the cutting edge 133 of the cutting tool 130 and the lower surface of the parallel coulter 121 is 0.1-0.3 mm, and the cutting direction and the workpiece 300 are at a distance of 0.1-0.3 mm. The 200mm side is parallel to x, and the width of the prepared corrugated structure fin 200 is 60mm; by adjusting the lateral movement device 520 and the longitudinal movement device 530 of the gantry 500, the combined tool unit 100 fixed on the gantry 500 controls the movement of the feed direction The height of the product transfer platform 700 is slightly lower than the corrugated structure fin 200. After the workbench 400 completes a cutting process, that is, after the cutting layer on the upper surface of the block metal workpiece 300 is removed, the corrugated structure fin 200 will automatically complete the cutting , and then fall on the product conveyor belt 710; the height of the edge of the box body 810 of the collection box 800 should be lower than the product conveyor platform 700, so that when the corrugated structure fin 200 is delivered to the end of the product conveyor belt 710, it will fall to the collection box under the influence of gravity , to complete the automatic collection of products.

In some embodiments of the present invention, the cutting speed + x direction is 30-120m/min, the cutting depth of the combined cutter unit 100 is 0.40-0.72mm, and the overall height range of the prepared corrugated fins 200 is about 3mm. 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 fins 200 prepared by this method have a large aspect ratio and have a larger These better properties will significantly increase the turbulence effect and improve the heat transfer efficiency, and 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 the massive metal workpiece 300. The workpiece is fixed on the workbench 400. When the workbench moves to the cutting direction + x, the combined tool unit fixed on the gantry 500 100 performs "plough cutting and shaping", "stacking and folding" and "cutting and separation" on the workpiece, and plows out a plurality of parallel continuous groove-shaped structures on the surface of the workpiece to be processed. Cutting and shaping” to form a continuous groove structure, the groove structure and the material to be cut at the bottom are cut and separated from the workpiece substrate by the cutting tool 130, and the groove structure is formed into a wave shape in the cutting area due to the principle of “stacking and folding” In appearance, the material to be cut at the bottom of the trough structure is formed into a continuous strip due to the principle of "cutting and separation", and the three-dimensional corrugated fin 200 with a corrugated top and a continuous strip at the bottom is manufactured by a cutting tool 130. The principle of processing Ingenious and innovative, the method is simple and efficient, can be directly applied to general-purpose machine tools, has strong adaptability, low cost and remarkable effect.

To sum up, the present invention not only successfully prepares the corrugated fins 200, but also has a simple and efficient method, a flexible device, and can be popularized and applied industrially.

In addition, the various parameters used in the above examples are for reference only, and those skilled in the art can make corresponding adjustments and transformations according to specific needs to achieve the purpose of different products, but these adjustments and transformations all belong to the claims of the present application. within the scope of inclusion.

Claims (10)

1. A device for preparing corrugated metal fins, characterized in that it comprises a motion unit, a heating unit, a combination cutter unit and a collection 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 feed of the tool, and the workpiece moving subunit is used to place a workpiece (300) to Drive the movement of the workpiece in the cutting direction; The heating unit is used to heat the workpiece (300); The combined tool unit (100) includes a knife handle (110), a plow extruding tool (120), and a cutting tool (130). The knife handle (110) is used to install a fixed tool, and the knife handle (110) includes a knife handle seat (111), knife seat (112) and positioning flange (116), knife handle seat (111) is connected with motion unit, and knife seat (112) and positioning flange (116) are all connected with knife handle seat (111); The plow extruding tool (120) is used to plow out a certain height, parallel and continuous groove-shaped structure on the surface to be processed of the workpiece. The plow extruding tool (120) is arranged on the knife seat (112), and the plow extruding tool ( 120) comprise the plow cutting tool block (124) and the parallel coulter (121) that is arranged on the plow cutting tool block (124), there are many parallel coulters (121), leave space between adjacent parallel coulters (121) There is a gap as a forming channel; the cutting tool (130) is set on the plowing tool (120), and the cutting tool (130) includes a rake face (131) and a cutting edge (132) for cutting the separated metal and finally making the wave structural fins (200); The collecting unit is used for collecting the processed fins (200) with corrugated structure. 2. A kind of device that is used to prepare metal fin of corrugated structure according to claim 1, is characterized in that, described cutter moving subunit comprises gantry (500), and described gantry (500) comprises gantry pillar ( 510), horizontal moving device (520) and vertical moving device (530), horizontal moving device (520) is horizontally arranged on the gantry pillar (510), and vertical moving device (530) is arranged on the horizontal moving device (520), the combination The cutter unit (100) is arranged on the longitudinal moving device (530), which fixes and controls the combined cutter unit (100) to move in the feed direction; The workpiece moving subunit includes a workbench (400), the workbench (400) is located below the combined tool unit (100) and the workbench (400) can move in the cutting direction, and the workpiece (300) is arranged on the workbench (400) On, the worktable (400) is used to fix and control the movement of the workpiece (300) in the cutting direction. 3. A device for preparing metal fins with a corrugated structure according to claim 1, characterized in that, there are flanges on both sides of the workpiece (300), and the flanges are provided with fixing through holes (310) , the workbench (400) is provided with a T-shaped slot (410), and the workpiece (300) is fixed by the cooperation of the fastener, the fixing through hole (310) and the T-shaped slot (410). 4. A kind of device for preparing corrugated structure metal fin according to claim 1, is characterized in that, described heating unit is induction heating module (600), comprises induction coil (610) and induction coil ( 610) connected to the induction heating power supply (620), the induction coil (610) is located below the entrance of the plow extrusion tool (120), and is used to heat the workpiece (300). 5. A kind of device for preparing corrugated structure metal fin according to claim 1, is characterized in that, described collection unit comprises product conveying platform (700) and collection box (800), and described product conveying platform ( 700) for transporting the processed corrugated structure fins (200) to the collection box (800). 6. A device for preparing metal fins with a corrugated structure according to claim 5, characterized in that the product conveying table (700) includes a motor (720) and a product conveying belt (710) driven by the motor (720) and motor (720). 7. A device for preparing metal fins with a corrugated structure according to claim 1, characterized in that, the plow extruding tool (120) is provided with two first positioning through holes (122), which are connected with the tool handle Two first positioning holes (113) provided on (110) cooperate; The plow extruding tool (120) is also provided with a second positioning threaded blind hole (123), which cooperates with the second positioning hole (114) provided on the knife handle (110); The cutting tool (130) is provided with an installation through hole (133), which cooperates with the first positioning hole (122) provided on the plow extrusion tool (120); A third positioning hole (115) is provided on the handle seat (111) for installation and positioning of the combined tool unit (100) and the motion unit. 8. A kind of device that is used for preparing corrugated structure metal fin according to claim 1 is characterized in that, also be provided with between the positioning flange (116) of tool handle (110) and cutting tool (130) Shim (140) is to change cutting depth; Simultaneously, also be provided with shim (140) between plow extruding tool (120) and cutting tool (130) to adjust plow extruding tool (120) and cutting tool (130) relative position between them. 9. A device for preparing metal fins with a wave structure according to any one of claims 1-8, characterized in that the distance between the tail of the parallel coulter (121) and the cutting edge (132) is set to 6.0 -10.0mm, set the height of the gap between the parallel coulters (121) that accommodate the fins to 1.0-2.0mm. 10. A method for preparing metal fins with a corrugated structure, characterized in that the device according to any one of claims 1-9 is used, and the method comprises 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 (300) affected by the heating unit rises, and when the temperature reaches the preset temperature and is kept for a period of time, the deformation resistance of the workpiece material decreases and the plasticity increases; Step 2. Forming the trough structure Start the workpiece moving subunit to move the workpiece to the cutting speed direction, and control the tool moving subunit to move the combined tool unit (100) along the feed direction to cut the material of the workpiece layer to be processed, wherein the plowing tool (120 ) first acts on the material of the layer to be cut, and exerts the effect of "ploughing and shaping" on 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 affected by the side wall of the channel. Extrusion and shaping effect to form a continuous groove structure similar to the shape of the forming channel; Step 3. Forming the waveform structure The cutting layer metal of the groove structure enters the cutting area, and the cutting tool (130) has two effects on the cutting layer metal: one is that the cutting tool (130) cuts the bottom of the cutting layer metal to separate it from the workpiece body, forming a continuous The second is that the cutting tool (130) forces the upper trough structure to shear, accumulate, and fold, and the result is that the trough structure transforms into a corrugated structure. The "cutting and separating" and "stacking and folding" of the groove-shaped structure by the cutting tool (130) are parallel forming processes to obtain a three-dimensional corrugated structure fin (200) with a corrugated structure at the top and a continuous strip at the bottom; Step 4. Fin Collection The prepared continuous corrugated fins (200) are transferred and collected by the collecting unit.

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