Fin forming device, production line and production method thereof

Abstract

The invention relates to the field of heat dissipation fin production, and specifically to a fin forming device and a production line and a production method thereof, comprising a fixed die, a movable die being arranged above the fixed die, and the movable die being able to move up and down in a vertical direction; a first stamping assembly being arranged on one side of a lower surface of the movable die and one side of an upper surface of the fixed die; each first stamping assembly comprising a plurality of stamping rows of teeth, the middle portion of each stamping row of teeth being arranged in a wavy shape, the two ends of each stamping row of teeth being arranged straight, and the upper and lower rows of stamping rows of teeth being arranged alternately; the first stamping assembly and the second stamping assembly arranged on the movable die and the fixed die are carried out synchronously, and the first stamping assembly and the second stamping assembly are designed in an integrated manner to ensure that the first stamping process and the second stamping process are carried out synchronously, and at the same time, the conveying step after the first processing of the heat dissipation fin is saved, and the overall processing efficiency of the heat dissipation fin is improved; and the integrated design can reduce the space occupied by equipment layout and meet the space requirements of the plant.

Description

Technical Field

[0001] The invention relates to the field of heat dissipation fin production, in particular to a fin forming device and a production line and a production method thereof. Background Art

[0002] Traditional plate-fin heat exchangers are usually composed of baffles, fins, seals and guide vanes; the baffles provide support for the fins, and the fins are usually welded to the baffles. The baffles provide support for the fins to ensure that the fins remain stable when subjected to fluid dynamics and other mechanical forces.

[0003] Among them, the fin is a key component in the plate-fin heat exchanger used to increase the heat transfer area and improve the heat exchange efficiency. Depending on the use environment, the heat dissipation fin can be processed and produced into different shapes, such as corrugated shape, herringbone shape or serrated shape.

[0004] The corrugated heat sink fins, such as Figure 1 The shape shown in FIG. 1 is a new improvement on the corrugated heat sink fin. The two ends of the fin are processed into an uneven shape, that is, the protruding part is a triangular cone shape, and the concave part is an inverted trapezoidal shape, such as Figure 2 The shape shown, and Figure 2 The triangular cone-shaped part design shows one end of the heat sink fin after the second stamping. It allows two adjacent heat sink fins stacked up and down to be directly welded together, which replaces the role of a partition and significantly improves the heat exchange efficiency and reduces material and production costs. At the same time, the triangular cone-shaped part design can also improve the connection stability and support strength of the corrugated heat sink fins when they are stacked up and down, as well as improve the quality of welding at the end of the heat sink fin and reduce the possibility of cold solder joints.

[0005] The above improvement on the heat sink fin requires that the coil is first processed into a basic corrugated heat sink fin and then sent to a second processing step for forming. That is, two independent processing equipment are required to process it into the final heat sink fin product in sequence.

[0006] Two independent devices will take up more space in terms of installation. It is difficult to lay out the equipment in some factories with limited space. At the same time, the two processing equipment are set up independently. After the first equipment processes, it is transmitted to the next processing equipment, which will take up some time and affect the processing efficiency. If the processing speed control of the two independent devices is not compatible, it may cause the processing speed of the first processing equipment to fail to meet the processing speed of the subsequent second processing equipment, or the processing speed of the first processing equipment may be greater than the processing speed of the subsequent second processing equipment, forcing the first processing equipment to suspend operation.

[0007] Therefore, in order to solve the above problems, a fin forming device, a production line and a production method thereof are proposed. Summary of the invention

[0008] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0009] The technical solution adopted by the present invention to solve the technical problem is: a fin secondary molding production line described in the present invention includes a stamping unit, and the stamping unit includes a fixed mold, a movable mold is arranged above the fixed mold, and the movable mold can move up and down in the vertical direction;

[0010] A first punching assembly is arranged on one side of the lower surface of the movable die and one side of the upper surface of the fixed die; each of the first punching assemblies comprises a plurality of punching teeth, the middle part of each punching tooth row is arranged in a wave shape, the two ends of each punching tooth row are arranged straight, and the upper and lower rows of punching teeth are arranged alternately;

[0011] A second stamping assembly is arranged on the other side of the lower surface of the movable mold and the other side of the upper surface of the fixed mold; each of the second stamping assemblies includes multiple rows of convex teeth, and each row of convex teeth on the lower surface of the movable mold is arranged opposite to each row of convex teeth on the upper surface of the fixed mold, and the two opposite rows of convex teeth are arranged alternately.

[0012] Preferably, grooves matching the shape of the stamping teeth are provided on one side of the lower surface of the movable mold and one side of the upper surface of the fixed mold. Hydraulic cylinders are fixedly connected to both ends of each row of stamping teeth, which can push the stamping teeth to slide along the grooves and protrude from the lower surface of the movable mold and the upper surface of the fixed mold.

[0013] Preferably, strip-shaped extrusion plates are provided at the front and rear edges of the other side of the lower surface of the movable mold and the other side of the upper surface of the fixed mold. The extrusion plates are arranged along the length direction of the fixed mold, and two adjacent extrusion plates are arranged opposite to each other.

[0014] Preferably, rollers are provided on both sides of the fixed mold, and the rollers are fixed on the fixed mold through support plates, and the coils used to produce fins can enter between the fixed mold and the movable mold along the rollers on one side of the fixed mold.

[0015] Preferably, an oil replenishing mechanism is further provided on one side of the fixed mold; the oil replenishing mechanism can spray lubricating oil on the surface of the coil used to produce the fins;

[0016] The oil replenishing mechanism includes two upper and lower adjacent hollow plates, and a plurality of oil spray holes are provided on the surface of the hollow plates. The lubricating oil sprayed from the oil spray holes on the upper hollow plate is sprayed on the upper surface of the coil used to produce the fins, and the lubricating oil sprayed from the oil spray holes on the lower hollow plate is sprayed on the lower surface of the coil used to produce the fins, and the ends of the upper and lower hollow plates are fixedly connected to the side wall of the fixed mold through support rods.

[0017] Preferably, an oil control component is provided between the hollow plate and the movable mold, and the oil control component is used to control the intermittent spraying of the lubricating oil;

[0018] The oil control assembly includes a vertical rod fixedly connected to one side wall of the movable mold, a valve body is provided at the lower end of the vertical rod, the valve body is fixedly connected to one side wall of the movable mold, an L-shaped oil channel is horizontally opened inside the valve body, one end of the oil channel is connected to the external oil supply pipe, and the other end of the oil channel is connected to the hollow plate through a hose, and a through hole is also opened inside the valve body, the vertical rod is sealed and slidably connected in the through hole, an L-shaped oil hole is opened on the vertical rod, and the two hole ends of the oil hole are arranged opposite to the two ends of the oil channel.

[0019] Preferably, a connecting rod is fixed between the ends of two upper and lower adjacent hollow plates, a wheel body is rotatably connected to the outer ring of the connecting rod, and an annular groove is provided on the outer ring of the wheel body for the edge of the coil for producing the fin to slide against the annular groove.

[0020] Preferably, the front and rear edges of the middle part of the fixed mold are provided with clearance grooves, each of which is provided with a C-shaped stripping plate, which is fixedly connected to the front and rear edges of the middle part of the movable mold; an oil collecting plate is provided on one side of the fixed mold, and the oil collecting plate is arranged below the roller body above it, and the lower end of the oil collecting plate is inclined to extend toward the oil collecting groove arranged at the bottom of the fixed mold.

[0021] A fin forming production line comprises an uncoiler, a punching unit, a head pressing machine and a coiling machine, wherein the uncoiler is used for uncoiling a fin raw material coil; the punching unit performs a primary punching and a secondary punching on the raw material coil to form the fins in sections; the head pressing machine performs a head pressing process and cuts the formed fins to a fixed length; the coiling machine coils the fins after the head pressing process and after the cut-off; the uncoiler, the punching unit, the head pressing machine and the coiling machine cooperate to perform automatic uncoiling processing of the fins, thereby forming an automated production of the fins.

[0022] A fin forming production method, which is suitable for the above-mentioned fin forming production line, and the fin forming production method comprises the following steps:

[0023] S1: The unwinder unwinds the coil and discharges the material into the stamping unit. The rolled metal forming material is unloaded by the release reel and discharged between the movable die and the fixed die, and then formed by stamping;

[0024] S2: The metal forming material is first stamped and formed in zones. The heat exchange area in the middle of the metal forming material is stamped in a corrugated, herringbone or zigzag shape. The left and right edges of the metal forming material are stamped in the form of straight fins. The straight fins serve as fin supports and hot and cold fluid diversion channels.

[0025] S3: The left and right edges of the fins are formed by stamping, and the edges of the straight fins are processed into two-section edges with a heat exchange and support area A and a welding area B through secondary edge processing and flattening processes, wherein the support area A is a triangular cone and the welding area B is a plane;

[0026] S4: The formed fins are cut into sections by a press machine, and the cut edges are processed. They are cut according to the expected cut length, and then the cut edges of the fins are pressed to enhance the stability of the cut position and the edge quality of the fins, so that the fins can be more firmly installed in the heat exchange core;

[0027] S5: The coiling machine coils the extra-long fins cut by the sheet press.

[0028] The present invention is beneficial in that:

[0029] 1. In the present invention, the first stamping assembly and the second stamping assembly arranged on the movable mold and the fixed mold are carried out simultaneously, and the first stamping assembly and the second stamping assembly are designed in an integrated manner to ensure that the first stamping process and the second stamping process are carried out simultaneously, while saving the transmission step after the first processing of the heat sink fins, improving the overall processing efficiency of the heat sink fins, and the integrated design can reduce the space occupied by the equipment layout and meet the space requirements of the factory.

[0030] 2. In the present invention, an oil control component is provided, and the oil control component can control the intermittent spraying of lubricating oil of the oil replenishing mechanism; when the movable mold moves downward, the two ports of the oil channel are connected through the oil hole, and the lubricating oil flows into the hose along the oil channel and the oil hole, and sprays out from the oil spray holes on the hollow plate, that is, when the movable mold moves downward, the oil spray holes spray out the lubricating oil, and when the movable mold moves upward and resets, the oil spray holes do not spray out the lubricating oil, thereby realizing intermittent controlled spraying of the lubricating oil and avoiding the lubricating oil from polluting the factory building or wasting it. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the first stamping process of the heat dissipation fins in the present invention;

[0032] Figure 2 This is a schematic diagram of the second stamping process of the heat dissipation fins in the present invention;

[0033] Figure 3 A first perspective stereoscopic view of the punching unit in the present invention;

[0034] Figure 4 A second perspective stereoscopic view of the punching unit of the present invention;

[0035] Figure 5 A third perspective stereogram of the punching unit of the present invention;

[0036] Figure 6 is a side view of the punching unit of the present invention;

[0037] Figure 7 It is a front view of the punching unit in the present invention;

[0038] Figure 8It is a three-dimensional diagram of the first stamping assembly in the present invention;

[0039] Fig. 9 It is a front view of the first punching assembly in the present invention;

[0040] Fig.10 A three-dimensional diagram of the fixed mold in the present invention;

[0041] Fig.11 A three-dimensional diagram of the movable mold in the present invention;

[0042] Fig.12 It is a three-dimensional diagram of the oil replenishing mechanism in the present invention;

[0043] Fig.13 A top view of the oil replenishing mechanism of the present invention;

[0044] Fig.14 It is a three-dimensional diagram of the vertical rod in the present invention;

[0045] Fig.15 It is a schematic diagram of the cooperation between the convex teeth on the movable die and the convex teeth on the fixed die in the present invention;

[0046] Fig.16 This is a flow chart of the fin secondary molding method of the present invention.

[0047] In the figure: 1. fixed die; 2. movable die; 3. stamping teeth; 4. convex teeth; 5. grooves; 6. hydraulic cylinder; 7. extrusion plate; 8. roller body; 9. hollow plate; 10. vertical rod; 11. valve body; 12. oil channel; 13. oil pipe; 14. through hole; 15. oil hole; 16. connecting rod; 17. wheel body; 18. give way groove; 19. stripping plate; 20. oil collecting plate; 21. oil collecting tank; 22. hydraulic cylinder. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0049] Reference Figure 1 - Fig.11 as well as Fig.15 , a fin forming production line disclosed in an embodiment of the present invention includes a stamping unit, and the stamping unit includes a fixed mold 1, a movable mold 2 is arranged above the fixed mold 1, and the movable mold 2 can move up and down in the vertical direction;

[0050] A first punching assembly is provided on one side of the lower surface of the movable die 2 and one side of the upper surface of the fixed die 1; each of the first punching assemblies includes a plurality of punching teeth 3, the middle portion of each punching tooth 3 is arranged in a wave shape, the two ends of each punching tooth 3 are arranged straight, and the upper and lower rows of punching teeth 3 are arranged alternately;

[0051] A second stamping assembly is provided on the other side of the lower surface of the movable die 2 and the other side of the upper surface of the fixed die 1; each of the second stamping assemblies includes a plurality of rows of convex teeth 4, and each row of convex teeth 4 on the lower surface of the movable die 2 is arranged opposite to each row of convex teeth 4 on the upper surface of the fixed die 1, and the two opposite rows of convex teeth 4 are arranged alternately;

[0052] In this embodiment, a guide plate for the movable mold 2 to move up and down is provided at the corner of the fixed mold 1, a platform is provided at the upper end of the guide plate, and a hydraulic cylinder 22 for driving the movable mold 2 to move up and down is provided on the platform. At the same time, a limit column is provided at a position where the movable mold 2 is opposite to the fixed mold 1, and the limit column is used to limit the distance between the lower surface of the movable mold 2 and the upper surface of the fixed mold 1;

[0053] A release reel is provided on one side of the fixed mold 1, on which a metal forming material is wound, and a winding reel is provided on the other side of the fixed mold 1, which is used to wind up the heat dissipation fins that have been completed through secondary processing;

[0054] The metal forming material is transported to the upper surface of the fixed mold 1, and then the hydraulic cylinder 22 drives the movable mold 2 to move downward, and the upper and lower rows of stamping teeth 3 stamp the metal forming material, stamping the metal forming material into Figure 1 The shape shown in the figure is that the middle of the heat sink fin is wavy and the two ends of the heat sink fin are straight. This is the first stamping. After that, the hydraulic cylinder 22 drives the movable die 2 to move upward, and then the metal forming material continues to be transmitted. The heat sink fin formed by the first stamping is transmitted to the second stamping assembly position. Then the hydraulic cylinder 22 drives the movable die 2 to move downward, and the upper and lower rows of stamping teeth 3 stamp the metal forming material. At the same time, each row of convex teeth 4 on the lower surface of the movable die 2 and each row of convex teeth 4 on the upper surface of the fixed die 1 are close to each other, and squeeze the two ends of the heat sink fin formed by the first stamping. The two ends of the heat sink fin are squeezed as shown in the figure. Figure 2 The shape shown, and Figure 2 The end of the heat sink fin after the second stamping is shown. The end of the heat sink fin is stamped into a two-section edge of a support area A and a welding area B, wherein the support area A is a triangular pyramid and the welding area B is a plane.

[0055] By analogy, the above steps can be repeated to process the entire roll of metal forming material into Figure 2 The shape shown is then cut into sections of the heat sink fins and the edges of the cut sections are processed;

[0056] Reference Fig.15 The cross-sectional shape of each convex tooth 4 on the lower surface of the movable mold 2 is an inverted trapezoidal shape, and the cross-sectional shape of each convex tooth 4 on the upper surface of the fixed mold 1 is a cone shape, such as Fig.15As shown, the upper and lower rows of convex teeth 4 are staggered, and the second stamping shape of the heat dissipation fin is determined by the number of convex teeth 4 in each row. If the number of convex teeth 4 on one side of each row of convex teeth 4 on the lower surface of the movable mold 2 is one, the number of convex teeth 4 on one side of each row of convex teeth 4 on the upper surface of the fixed mold 1 is two; if the number of convex teeth 4 on one side of each row of convex teeth 4 on the lower surface of the movable mold 2 is two, the number of convex teeth 4 on one side of each row of convex teeth 4 on the upper surface of the fixed mold 1 is three;

[0057] The first stamping assembly and the second stamping assembly arranged on the movable die 2 and the fixed die 1 are carried out simultaneously, and the first stamping assembly and the second stamping assembly are designed in an integrated manner, so as to ensure that the first stamping process and the second stamping process are carried out simultaneously, and at the same time, the conveying step after the first processing of the heat sink fin is saved, and the overall processing efficiency of the heat sink fin is improved. The integrated design can reduce the space occupied by the equipment layout and meet the space requirements of the plant.

[0058] In this embodiment, distributed 1 / 0 centralized control PLC control is used to realize the fin height servo adjustment of the heat sink fin forming machine, the fin height servo adjustment of the fin pressing machine, the tooth pushing servo operation and the fin length detection. At the same time, a protective visual inspection system and an online precision inspection system are set on the fixed mold 1, and it is integrated with the customer's production management system to realize the automation of the heat sink fin production process.

[0059] The fully automatic coiling machine, the release reel and the reel-in reel can automatically reel the formed heat sink fins. The coiling machine detection mechanism can cooperate with the fin reeling process, adjust the speed at any time, and improve the reeling quality.

[0060] Reference Figure 1 - Fig.11 A groove 5 adapted to the shape of the stamping row teeth 3 is provided on one side of the lower surface of the movable mold 2 and one side of the upper surface of the fixed mold 1. Both ends of each row of stamping row teeth 3 are fixedly connected with a hydraulic cylinder 6, which can push the stamping row teeth 3 to slide along the groove 5 and protrude from the lower surface of the movable mold 2 and the upper surface of the fixed mold 1;

[0061] Considering that the stamping row of teeth 3 stamps the metal forming material into a wavy heat dissipation fin, when the movable mold 2 moves away from the fixed mold 1, the heat dissipation fin may be stuck in the stamping row of teeth 3, affecting the transmission of the metal forming material. For this reason, the stamping row of teeth 3 is slidably arranged in the groove 5, that is, in the initial state, the impact ribs are placed in the groove 5, and when the metal forming material needs to be stamped, the stamping row of teeth 3 protrudes from the notch of the groove 5 and squeezes on the metal forming material;

[0062] The specific operation is that when the hydraulic cylinder 22 drives the movable mold 2 to move downward, a certain gap is reserved between the lower surface of the movable mold 2 and the upper surface of the fixed mold 1. The height value of the gap is the height difference between the highest point and the lowest point of the heat dissipating fin formed by the first stamping, and then the upper and lower hydraulic cylinders 6 are driven synchronously. The upper and lower hydraulic cylinders 6 drive the stamping row teeth 3 to move out of the groove 5, and the lower stamping row teeth 3 stamps the metal forming material upward to squeeze the upper surface of the metal forming material on the lower surface of the movable mold 2. The upper stamping row teeth 3 stamps the metal forming material downward to squeeze the lower surface of the metal forming material on the upper surface of the fixed mold 1. At this time, the metal forming material is stamped for the first time, and then the upper and lower hydraulic cylinders 6 are driven synchronously to drive the stamping row teeth 3 to reset to the groove 5. Under the support of the fixed mold 1, the heat dissipating fins are stably kept in the reserved gap between the lower surface of the movable mold 2 and the upper surface of the fixed mold 1. Then the hydraulic cylinder 22 moves upward again, and then the metal forming material continues to be transmitted forward for the second stamping.

[0063] Reference Figure 1 - Fig.11 A strip-shaped extrusion plate 7 is provided at the front and rear edges of the other side of the lower surface of the movable mold 2 and the other side of the upper surface of the fixed mold 1. The extrusion plate 7 is arranged along the length direction of the fixed mold 1, and two adjacent extrusion plates 7 are arranged opposite to each other;

[0064] The extrusion plate 7 is designed in the shape of an angle iron, and is fixed to the fixed mold 1 and the movable mold 2 by bolts, and can be flexibly disassembled and replaced. The purpose of disassembly and replacement is to select extrusion plates 7 of different thicknesses. Extrusion plates 7 of different thicknesses can extrude welding areas B of different thicknesses at the end of the heat dissipation fins, and welding areas B of different thicknesses can be suitable for different welding requirements to meet customer needs.

[0065] Reference Figure 1 - Figure 7 , rollers 8 are provided on both sides of the fixed mold 1, and the rollers 8 are fixed on the fixed mold 1 through support plates, and the coils used to produce the fins can enter between the fixed mold 1 and the movable mold 2 along the rollers 8 on one side of the fixed mold 1;

[0066] By arranging roller bodies 8 on both sides of the fixed mold 1, the roller bodies 8 are used to lift the metal forming materials and the heat sink fins that are subsequently processed. The longer metal forming materials and heat sink fins are lifted, the pulling force on the heat sink fins formed by the processing is reduced, and the deformation of the heat sink fins formed by the processing is reduced.

[0067] Reference Figure 3 , Figure 7 , Fig.12 , Fig.13 and 14, an oil replenishing mechanism is also provided on one side of the fixed mold 1; the oil replenishing mechanism can spray lubricating oil on the surface of the coil used to produce the fins;

[0068] The oil replenishing mechanism comprises two upper and lower adjacent hollow plates 9, and a plurality of oil spray holes are provided on the surface of the hollow plates 9. The lubricating oil sprayed from the oil spray holes on the upper hollow plate 9 is sprayed on the upper surface of the coil used to produce the fins, and the lubricating oil sprayed from the oil spray holes on the lower hollow plate 9 is sprayed on the lower surface of the coil used to produce the fins, and the ends of the upper and lower hollow plates 9 are fixedly connected to the side wall of the fixed mold 1 through support rods;

[0069] An oil replenishing mechanism is arranged on one side of the fixed mold 1. Compared with an oil replenishing device or apparatus arranged on the side of the release reel, more lubricating oil can be ensured to stay on the surface of the metal forming material. If an oil replenishing device or apparatus is arranged on the side of the release reel, the lubricating oil is sprayed on the metal forming material in advance. Before the metal forming material is conveyed to the position of the fixed mold 1, part of the lubricating oil will drip onto the ground, and the amount of lubricating oil staying on the surface of the metal forming material will be reduced, which will affect the subsequent stamping quality of the heat sink fin surface.

[0070] The hollow plate 9 is connected to an external oil supply pipe 13, and the external oil supply pipe 13 is connected to an external oil pump. The oil pump injects lubricating oil into the hollow plate 9 and sprays the lubricating oil from the oil spray hole. The lubricating oil is evenly sprayed on the surface of the metal forming material.

[0071] Reference Figure 3 , Figure 7 , Fig.12 , Fig.13 and 14 An oil control component is provided between the hollow plate 9 and the movable mold 2, and the oil control component is used to control the intermittent spraying of the lubricating oil;

[0072] The oil control assembly includes a vertical rod 10 fixedly connected to a side wall of the movable mold 2, a valve body 11 is provided at the lower end of the vertical rod 10, the valve body 11 is fixedly connected to a side wall of the movable mold 2, an L-shaped oil passage 12 is horizontally opened inside the valve body 11, one end of the oil passage 12 is connected to an external oil supply pipe 13, and the other end of the oil passage 12 is connected to the hollow plate 9 through a hose, and a through hole 14 is also opened inside the valve body 11, the vertical rod 10 is sealed and slidably connected inside the through hole 14, and an L-shaped oil hole 15 is opened on the vertical rod 10, and the two hole ends of the oil hole 15 are arranged opposite to the two ends of the oil passage 12;

[0073] If the oil injection hole is always in the oil injection state, there will be excess lubricating oil on the surface of the metal forming material, and this excess lubricating oil will drip onto the ground, polluting the factory building or causing waste of lubricating oil. For this reason, an oil control component is set up, which can control the intermittent spraying of lubricating oil by the oil replenishing mechanism;

[0074] When the movable mold 2 is in the initial state, that is, the movable mold 2 has not moved toward the fixed mold 1, the oil hole 15 on the vertical rod 10 is located above the valve body 11, and the vertical rod 10 located in the valve body 11 blocks the oil passage 12, and the lubricating oil cannot flow into the hollow plate 9 at this time; when the movable mold 2 moves downward to a predetermined position, the oil hole 15 on the vertical rod 10 moves into the valve body 11, and at this time, the two ends of the oil passage 12 are connected through the oil hole 15, and the lubricating oil flows into the hose along the oil passage 12 and the oil hole 15, and sprays out from the oil spray hole on the hollow plate 9, that is, when the movable mold 2 moves downward, the oil spray hole sprays out the lubricating oil, and the movable mold 2 moves upward to reset, and the oil spray hole is blocked again and no longer sprays out the lubricating oil, thereby realizing intermittent controlled spraying of the lubricating oil, and avoiding the lubricating oil from polluting the factory building or wasting;

[0075] At the same time, when the movable mold 2 is moved up and reset, and no lubricating oil is sprayed out of the oil injection hole, the oil pressure inside the lubricating oil is increased. When the two ends of the oil channel 12 are connected through the oil hole 15, the lubricating oil sprayed out of the oil injection hole will be farther and cover a wider surface of the metal forming material, so that the lubricating oil fully covers the surface of the metal forming material.

[0076] Reference Figure 1 - Figure 7 A connecting rod 16 is fixedly connected between the ends of two upper and lower adjacent hollow plates 9, and a wheel body 17 is rotatably connected to the outer ring of the connecting rod 16. An annular groove is provided on the outer ring of the wheel body 17, and the edge of the coiled material for producing the fins slides against the annular groove;

[0077] When the metal forming material is transferred to the fixed mold 1, the edge of the metal forming material slides in the annular groove on the wheel body 17, and the edge of the metal forming material can push the wheel body 17 to rotate around the connecting rod 16, and the wheel body 17 is used to constrain the movement of the metal forming material, reduce the edge offset of the metal forming material, and stamp out high-quality heat sink fins.

[0078] Reference Figure 1 - Fig.11 The front and rear edges of the middle part of the fixed mold 1 are provided with clearance grooves 18, each of which is provided with a C-shaped stripping plate 19, and the stripping plate 19 is fixedly connected to the front and rear edges of the middle part of the movable mold 2;

[0079] After the second stamping assembly squeezes the end of the heat sink fin, the heat sink fin needs to be transported forward, and the lower surface of the heat sink fin is attached to the upper surface of the fixed mold 1. Due to the setting of the convex teeth 4 on the fixed mold 1, the convex teeth 4 may conflict with the lower surface of the heat sink fin, resulting in the heat sink fin cannot be smoothly transported forward; if the convex teeth 4 are also set in the groove 5 according to the design of the stamping row teeth 3, that is, the groove 5 is set on the other side of the upper surface of the fixed mold 1, and the convex teeth 4 that can move up and down are set in the groove 5, although the problem of the convex teeth 4 hindering the movement of the heat sink fin can be solved, the groove 5 at this position will hinder the movement of the heat sink fin, because the lower surface of the heat sink fin is wavy, and the edge of the wavy part will also conflict with the notch of the groove 5;

[0080] For this purpose, a stripper plate 19 is provided, which can pull the stamped heat sink fins upward so that the heat sink fins are separated from the convex teeth 4. The stripper plate 19 moves with the upward and downward movement of the movable mold 2. The movable mold 2 moves downward, and the stripper plate 19 moves downward into the make way groove 18. At this time, both sides of the heat sink fins are placed in the stripper plate 19, and the lower surface of the heat sink fins is attached to the upper surface of the fixed mold 1. When the movable mold 2 moves upward, the stripper plate 19 drives the heat sink fins to move upward, so that the heat sink fins are separated from the convex teeth 4, and then the metal forming material is conveyed forward, and the winding wheel winds up the stamped heat sink fins.

[0081] Reference Figure 1 - Figure 7 An oil collecting plate 20 is provided on one side of the fixed mold 1, and the oil collecting plate 20 is arranged below the roller body 8 above the fixed mold 1, and the lower end of the oil collecting plate 20 is inclined to extend toward the oil collecting groove 21 arranged at the bottom of the fixed mold 1;

[0082] When lubricating oil is sprayed on the lower surface of the metal forming material, it is inevitable that excess lubricating oil will drip. In order to prevent the lubricating oil from dripping on the ground and polluting the factory building, an oil collecting plate 20 is provided on the lower surface of the metal forming material. The upper end of the oil collecting plate 20 is inclined to extend to the bottom of the roller body 8, that is, the upper end of the oil collecting plate 20 is inclined to extend to a position where the possibility of lubricating oil dripping is greater. The lubricating oil drips on the oil collecting plate 20 and flows to the oil collecting tank 21 to be collected and reused.

[0083] A fin forming production line includes an unwinding machine, a punching unit, a head pressing machine and a coiling machine. The unwinding machine is used to unwind the fin raw material roll; the punching unit performs a primary punching and a secondary punching on the raw material roll to form the fins in sections; the head pressing machine performs a head pressing process and a fixed-length cut on the formed fins; and the coiling machine rolls up the fins after the head pressing process and the cut-off. The unwinding machine, the punching unit, the head pressing machine and the coiling machine cooperate to perform automatic unwinding processing of the fins, thereby forming an automated production of the fins, which is beneficial to improving the production efficiency of the fins.

[0084] The rolled fins can be made into an annular core or stacked to make a square heat exchanger.

[0085] Reference Fig.16 A fin forming production method is provided, and the fin forming production method is suitable for the above-mentioned fin forming production line, and the fin forming production method comprises the following steps:

[0086] S1: The unwinder unwinds the coil and discharges the material into the stamping unit. The rolled metal forming material is unloaded by the release reel and discharged between the movable die 2 and the fixed die 1, and then formed by stamping;

[0087] S2: The metal forming material is first stamped and formed in zones. The heat exchange area in the middle of the metal forming material is stamped in a corrugated, herringbone or zigzag shape. The left and right edges of the metal forming material are stamped in the form of straight fins. The straight fins serve as fin supports and hot and cold fluid diversion channels.

[0088] S3: The left and right edges of the fins are formed by stamping, and the edges of the straight fins are processed into two-section edges with a heat exchange and support area A and a welding area B through secondary edge processing and flattening processes, wherein the support area A is a triangular cone and the welding area B is a plane;

[0089] The edge of the fin is stamped and formed, and the straight edge area is processed into a two-section edge with a heat exchange and support area A and a welding area B through secondary edge processing and flattening. The heat exchange and support area A retains part of the straight straight channel while forming multiple stable support points through a specific undulating structure to strengthen the edge strength of the fin and facilitate non-deformation when the fins are stacked. The welding area B is flattened to a specific thickness to ensure edge strength without causing material damage, which is convenient for subsequent welding processing;

[0090] Special fins for heat exchange core of waste heat recovery system: the fin area is used for heat dissipation, the edge reinforcement fins are used to maintain the flow channel, support and seal welding, and the forming processing of the cut-off parts can make the fin installation more secure and avoid displacement and other factors that affect the stacking stability.

[0091] S4: The formed fins are cut into sections by a press machine, and the cut edges are processed. They are cut according to the expected cut length, and then the cut edges of the fins are pressed to enhance the stability of the cut position and the edge quality of the fins, so that the fins can be more firmly installed in the heat exchange core;

[0092] S5: The coiling machine coils the extra-long fins cut by the sheet press.

[0093] Forming and punching of the fin cut-off part. After reaching the specified cut-off length, the fin cut-off position is located first, and the fins of the specified width before and after the cut-off position are pressed into a specific undulating structure to enhance the stability and edge quality of the fin cut-off position. The cut-off part with a specific undulating structure allows the fins to be more firmly installed in the heat exchange core to prevent unnecessary displacement from affecting the stability of the fin stacking.

[0094] Working principle: When the hydraulic cylinder 22 drives the movable mold 2 to move downward, a certain gap is reserved between the lower surface of the movable mold 2 and the upper surface of the fixed mold 1. The height value of the gap is the height difference between the highest point and the lowest point of the heat sink fin formed by the first stamping, and then the hydraulic cylinder 6 is driven. The hydraulic cylinder 6 drives the stamping row of teeth 3 to move out of the groove 5. The lower stamping row of teeth 3 stamps the metal forming material upward, and squeezes the upper surface of the metal forming material on the lower surface of the movable mold 2. The upper stamping row of teeth 3 stamps the metal forming material downward, and squeezes the lower surface of the metal forming material on the upper surface of the fixed mold 1. At this time, the metal forming material is stamped for the first time, and then the hydraulic cylinder 6 drives the stamping row of teeth 3 to reset to the groove 5. The heat sink fin is constrained by the movable mold 2 and the fixed mold 1, so that the heat sink fin is stably lifted and retained on the upper surface of the fixed mold 1. Then the hydraulic cylinder 22 moves upward again, and then the metal forming material continues to be transmitted forward for the second stamping.

[0095] The second stamping is as follows: the hydraulic cylinder 22 then drives the movable die 2 to move downward, and the upper and lower rows of stamping teeth 3 stamp the metal forming material. At the same time, each row of convex teeth 4 on the lower surface of the movable die 2 and each row of convex teeth 4 on the upper surface of the fixed die 1 approach each other and squeeze the two ends of the heat sink fins formed by the first stamping. The two ends of the heat sink fins are squeezed into Figure 2 In the shape shown, the end of the heat dissipation fin is punched into a two-section edge of a support area A and a welding area B, wherein the support area A is a triangular pyramid and the welding area B is a plane.

[0096] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fin forming device, characterized in that: The punching unit comprises a fixed die (1), a movable die (2) is arranged above the fixed die (1), and the movable die (2) can move up and down in a vertical direction; A first punching assembly is disposed on one side of the lower surface of the movable die (2) and one side of the upper surface of the fixed die (1); each of the first punching assemblies comprises a plurality of punching row teeth (3), the middle portion of each punching row tooth (3) is arranged in a wave shape, the two ends of each punching row tooth (3) are arranged straight, and the upper and lower rows of punching row teeth (3) are arranged in a staggered manner; A second punching assembly is arranged on the other side of the lower surface of the movable die (2) and the other side of the upper surface of the fixed die (1); each of the second punching assemblies comprises a plurality of rows of convex teeth (4), and each row of convex teeth (4) on the lower surface of the movable die (2) is arranged opposite to each row of convex teeth (4) on the upper surface of the fixed die (1), and the two opposite rows of convex teeth (4) are arranged in an alternating manner.

2. A fin forming device according to claim 1, characterized in that: A groove (5) adapted to the shape of the punching row teeth (3) is provided on one side of the lower surface of the movable die (2) and one side of the upper surface of the fixed die (1). Both ends of each row of punching row teeth (3) are fixedly connected to a hydraulic cylinder (6). The hydraulic cylinder (6) can push the punching row teeth (3) to slide along the groove (5) and protrude from the lower surface of the movable die (2) and the upper surface of the fixed die (1).

3. A fin forming device according to claim 2, characterized in that: Strip-shaped extrusion plates (7) are provided at the front and rear edges of the other side of the lower surface of the movable mold (2) and the other side of the upper surface of the fixed mold (1). The extrusion plates (7) are arranged along the length direction of the fixed mold (1), and two adjacent extrusion plates (7) are arranged opposite to each other.

4. A fin forming device according to claim 3, characterized in that: Rollers (8) are provided on both sides of the fixed mold (1), and the rollers (8) are fixed to the fixed mold (1) via support plates, so that the coiled material used to produce the fins can enter between the fixed mold (1) and the movable mold (2) along the rollers (8) on one side of the fixed mold (1).

5. A fin forming device according to claim 4, characterized in that: An oil replenishing mechanism is also provided on one side of the fixed mold (1); the oil replenishing mechanism is capable of spraying lubricating oil on the surface of the coil used to produce the fins; The oil replenishing mechanism comprises two upper and lower adjacent hollow plates (9), a plurality of oil spray holes being provided on the surface of the hollow plates (9), the lubricating oil sprayed from the oil spray holes on the upper hollow plate (9) being sprayed on the upper surface of the coiled material used to produce the fins, and the lubricating oil sprayed from the oil spray holes on the lower hollow plate (9) being sprayed on the lower surface of the coiled material used to produce the fins, and the ends of the upper and lower hollow plates (9) being fixedly connected to the side wall of the fixed mold (1) via support rods.

6. A fin forming device according to claim 5, characterized in that: An oil control component is provided between the hollow plate (9) and the movable mold (2), and the oil control component is used to control the intermittent spraying of lubricating oil; The oil control assembly comprises a vertical rod (10) fixedly connected to a side wall of the movable mold (2); a valve body (11) is provided at the lower end of the vertical rod (10); the valve body (11) is fixedly connected to a side wall of the movable mold (2); an L-shaped oil passage (12) is horizontally provided inside the valve body (11); one end of the oil passage (12) is connected to an external oil supply pipe (13); the other end of the oil passage (12) is connected to the hollow plate (9) through a hose; a through hole (14) is also provided inside the valve body (11); the vertical rod (10) is sealingly and slidably connected inside the through hole (14); an L-shaped oil hole (15) is provided on the vertical rod (10); two hole ends of the oil hole (15) are arranged opposite to two ends of the oil passage (12).

7. A fin forming device according to claim 6, characterized in that: A connecting rod (16) is fixedly connected between the ends of two upper and lower adjacent hollow plates (9), and a wheel body (17) is rotatably connected to the outer ring of the connecting rod (16). The outer ring of the wheel body (17) is provided with an annular groove, and the edge of the coiled material for producing the fins slides against the annular groove.

8. A fin forming device according to claim 6, characterized in that: The fixed mold (1) is provided with a clearance groove (18) at the front and rear edges of the middle part of the fixed mold (1), and a C-shaped stripping plate (19) is arranged in each clearance groove (18). The stripping plate (19) is fixedly connected to the front and rear edges of the middle part of the movable mold (2). An oil collecting plate (20) is arranged on one side of the fixed mold (1), and the oil collecting plate (20) is arranged below the roller body (8) above the fixed mold (1). The lower end of the oil collecting plate (20) is inclined and extends toward the oil collecting groove (21) arranged at the bottom of the fixed mold (1).

9. A fin forming production line, comprising a fin forming device according to any one of claims 1 to 8, characterized in that: It includes an uncoiler, a punching unit, a head press and a coiling machine. The uncoiler is used for uncoiling the fin raw material coil; the punching unit performs primary and secondary punching on the raw material coil to partition and form the fins; the head press performs head processing and fixed-length cutting on the formed fins; the coiling machine rolls up the fins after head processing and cutting; the uncoiler, the punching unit, the head press and the coiling machine cooperate to perform automatic uncoiling processing of the fins, thereby forming automated production of the fins.

10. A fin forming production method, the fin forming production method comprising a fin forming production line as claimed in claim 9, characterized in that: The fin forming production method comprises the following steps: S1: The unwinding machine unwinds the coil and discharges the material into the stamping unit. The rolled metal forming material is discharged from the release reel and discharged between the movable die (2) and the fixed die (1), and then is formed by stamping; S2: The metal forming material is first stamped and formed in zones. The heat exchange area in the middle of the metal forming material is stamped in a corrugated, herringbone or zigzag shape. The left and right edges of the metal forming material are stamped in the form of straight fins. The straight fins serve as fin supports and hot and cold fluid diversion channels. S3: The left and right edges of the fins are formed by stamping, and the edges of the straight fins are processed into two-section edges with a heat exchange and support area A and a welding area B through secondary edge processing and flattening processes, wherein the support area A is a triangular cone and the welding area B is a plane; S4: The formed fins are cut into sections by a press machine, and the cut edges are processed. They are cut according to the expected cut length, and then the cut edges of the fins are pressed to enhance the stability of the cut position and the edge quality of the fins, so that the fins can be more firmly installed in the heat exchange core; S5: The coiling machine coils the extra-long fins cut by the sheet press.

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