Self-adaptive precision die for forming fins of cooling fins

Abstract

The invention relates to the technical field of fin forming dies, in particular to a self-adaptive precision die for fin forming of cooling fins, which comprises an equipment machine table and a hydraulic impact table, a through cavity is formed in the equipment machine table, and a material moving lower die table is mounted on the inner bottom wall of the cavity of the equipment machine table; a telescopic impact assembly is arranged on the upper side of the material moving lower die table, the upper end of the impact assembly is connected with the impact telescopic end of the hydraulic impact table, the hydraulic impact table drives the impact assembly to move up and down, and a plurality of vertically-arranged die guide columns are installed in a cavity of the equipment table. When the punching assembly punches downwards, the die head assembly expands outwards to form a complete cylindrical surface and then punches a fin on the lower side, and when the die head assembly is driven to move upwards after punching, the die head assembly is controlled to be shrunk to be transversely separated from a punched fin hole shaft, and then the die head assembly is pulled out of a punched hole; and the resistance between the die head assembly and the fins during separation is reduced, and fin stripping is facilitated.

Description

Technical Field

[0001] This invention relates to the technical field of fin forming molds, and in particular to an adaptive precision mold for heat sink fin forming. Background Technology

[0002] Heat sink fins, as a key structure in thermal management devices, are widely used in electronic components, power modules, and new energy equipment. Their main function is to effectively reduce the operating temperature of core components by increasing the heat dissipation surface area and enhancing convection and radiation heat transfer. To improve heat dissipation efficiency, modern heat sinks generally pursue high-density, ultra-thin, and high-thermal-conductivity integrated fin structures. Stainless steel heat sink fins are commonly used due to their advantages of corrosion resistance, high temperature resistance, and high strength.

[0003] During the stamping of heat dissipation fins, a conveying device is set on one side of the stamping die equipment to control the movement of the heat dissipation fins. The fins are controlled to move intermittently under the stamping structure. After each stamping is completed by the upper die moving downwards, the conveying device moves the fins once, thus performing a production line stamping process on the fins to ensure processing efficiency.

[0004] Chinese patent CN121017384A discloses a heat sink fin stamping die and its stamping forming equipment, including an upper die and a lower die. The lower side of the upper die is movably connected to an upper pressure plate frame, with an upper support spring connecting them; the upper side of the lower die is movably connected to a lower pressure plate frame, with a lower support spring connecting them. One side of the lower end of the upper die has an upper shearing strip passing through the upper pressure plate frame, and the lower pressure plate frame has a corresponding lower limiting groove; one side of the upper end of the lower die has a lower shearing strip passing through the lower pressure plate frame. The upper and lower shearing strips are connected end-to-end in the horizontal plane, and the upper pressure plate frame has an upper limiting groove cooperating with the lower shearing strip. The lower end of the upper die has upper stamping extension strips at equal intervals on one side of the upper shearing strip, and the lower pressure plate frame has a corresponding lower support groove; the upper end of the lower die has lower stamping extension strips at equal intervals on one side of the lower shearing strip, and the upper pressure plate frame has a corresponding upper support groove. The lower end of the upper pressure plate frame has a pressing strip at a point on the upper stamping extension strip away from the upper shearing strip. This invention uses a stamping process to achieve rapid one-piece forming of thinner fins, which greatly improves production efficiency.

[0005] Existing technologies and the aforementioned related technologies have certain technical problems in fin stamping. Due to the hardness of stainless steel and its high springback coefficient, the deformation of stainless steel in a single impact deformation during traditional punching and forming is relatively large, resulting in a large springback distance. When the die rod separates from the fin hole, the springback fin will cling to the die rod and is difficult to unload. Generally, unloading is accomplished by applying resistance to the fin. However, when the clamping force between the fin and the upper die is large and the resistance generated between the fin and the upper die is large, the fin is prone to bending during unloading. The bent fin, due to deformation, affects the accuracy of subsequent processing such as flanging after punching. Summary of the Invention

[0006] To address the problems mentioned in the background art, the present invention provides an adaptive precision mold for heat sink fin forming.

[0007] This invention provides an adaptive precision mold for heat sink fin forming, employing the following technical solution: It includes a machine base and a hydraulic impact platform. The machine base has a through cavity, and the hydraulic impact platform is installed inside the cavity. A material moving lower mold platform is installed on the bottom wall of the cavity. A retractable impact component is provided on the upper side of the material moving lower mold platform. The upper end of the impact component is connected to the impact retractable end of the hydraulic impact platform. The hydraulic impact platform drives the impact component to move up and down. Multiple vertically arranged mold guide pillars are installed inside the cavity of the machine base. The two ends of the impact component are fitted onto the outside of the mold guide pillars. The lower retractable end of the impact component makes damped contact with the mold guide pillar. The mold guide pillar drives the upper end of the impact component to move up and down, while the lower end of the impact component moves with a delay.

[0008] Multiple die head assemblies are provided on the upper side of the material moving lower mold platform. The die head assembly can tighten towards its axis and expand away from its axis to form a complete cylindrical surface. The upper end of the die head assembly is connected to the upper and lower telescopic ends of the impact assembly. When the impact assembly moves downward, the die head assembly first expands into a complete cylindrical surface and then moves. When the impact assembly moves upward, the die head assembly first tightens towards its axis to reduce the maximum outer diameter. The lower end height of the multiple die head assemblies is set to rise in a stepped manner.

[0009] Optionally, the impact assembly includes an impact frame and a delay frame. The delay frame is located below the impact frame. Both the delay frame and the impact frame are slidably sleeved on the outside of each mold guide post. Each mold guide post is provided with a toothed groove, which engages with a delay toothed rod. An elastic telescopic rod is fixed to the other end of the delay toothed rod, and the other end of the elastic telescopic rod is fixed to the delay frame.

[0010] Both the delay frame and the impact frame are connected to the die head assembly. The impact frame is equipped with a bending lifting plate, and one end of the bending lifting plate is located on the lower side of the delay frame and bends towards the lower side of the delay frame.

[0011] Optionally, the die assembly includes an upper frame and a lower frame, with the lower frame located below the upper frame. The two ends of the upper frame are fixed to the impact frame, and the two ends of the lower frame are fixed to the delay frame.

[0012] The mold head assembly also includes a central mold column and an end plate. The upper frame is fixed to the central mold column, the lower frame is fixed to the end plate, and the end plate is coaxially slidably sleeved on the outside of the central mold column.

[0013] The bottom surface of the end plate is slidably connected to multiple stamping column plates and multiple stamping slot plates around the central mold column. The number of stamping column plates and stamping slot plates is equal, and the multiple stamping column plates and multiple stamping slot plates are staggered around the central mold column axis. The upper ends of the stamping column plates and stamping slot plates are elastically connected to the end plate.

[0014] Optionally, the outer ring surface of the central mold column is provided with an upper track groove at each stamping slot plate, and the outer ring surface of the central mold column is provided with a lower track groove at each stamping column plate. The upper end of the upper track groove is located above the upper end of the horizontally adjacent lower track groove, and the depth of the upper track groove is greater than the depth of the lower track groove.

[0015] Optionally, both the stamping column plate and the stamping seam plate have at least two protrusions on the side near the central die column. The number and height of the protrusions on the surfaces of the stamping column plate and the stamping seam plate are the same. The number of upper and lower track grooves on the surface of the central die column are respectively matched with the number of protrusions on the stamping seam plate and the number of protrusions on the stamping column plate.

[0016] Optionally, a gap larger than the width of the stamping gap plate is provided between two adjacent stamping column plates near the end of the central mold column. Limiting vertical plates are provided on both sides of the stamping column plate and both sides of the stamping gap plate. The upper end of the limiting vertical plate is fixed to the end plate, and the limiting vertical plate slides in contact with the central mold column.

[0017] Optionally, the lower ends of the stamping column plate and the stamping seam plate are both set as conical surfaces, and a central cone head is provided on the lower side of the central die column, with the upper surface of the central cone head fixed to the limiting vertical plate.

[0018] Optionally, when the protrusions of the multiple stamping column plates and multiple stamping slot plates are disengaged from the lower track groove and the upper track groove respectively, the side of the multiple stamping column plates and multiple stamping slot plates away from the central mold column forms a complete cylindrical surface coaxial with the central mold column, and the upper surface of the central cone head is in contact with the lower cone surface of the stamping column plate and the stamping slot plate.

[0019] Optionally, the upper frame and the lower frame are detachably connected to the impact frame and the delay frame by bolts, respectively, and the impact frame and the delay frame are composed of rod-like structures connected by bolts.

[0020] Optionally, the upper ends of both the upper and lower track grooves are inclined surfaces, and the bottom surfaces of both the upper track groove and the lower track groove on the same circumference are horizontal surfaces.

[0021] In summary, the present invention has the following beneficial technical effects: This invention, through the cooperation of an impact component, a mold guide post, and a mold head component, allows the mold head component to expand outward into a complete cylindrical surface before pressing the lower fins when the impact component presses downward. After pressing, when the mold head component moves upward, the mold head component is controlled to first contract and laterally disengage from the fin hole axis relative to the pressing. Then, the mold head component is pulled out from the pressing hole, reducing the resistance between the mold head component and the fins when disengaging, thus facilitating fin unloading.

[0022] This invention utilizes the cooperation of the upper and lower track grooves, the stamping column plate, and the protrusions on the side of the stamping slot plate. When the central die column moves upward relative to the end plate, the protrusions corresponding to the stamping slot plate first enter the corresponding upper track groove, creating a gap between adjacent stamping column plates. Then, the protrusions corresponding to the stamping column plate enter the lower track groove. The depth of the upper track groove is greater than the depth of the lower track groove. As the central die column moves upward, the stamping column plate and the stamping slot plate move different distances along their axis. The equal-lower rebound gap between the stamping column plate, the stamping slot plate, and the stamped fin holes facilitates the fins' separation from the stamping column plate and the stamping slot plate.

[0023] This invention uses multiple die head assemblies with their lower ends arranged in a gradient. During the movement of the conveying fins, the multiple die head assemblies arranged in a gradient gradually increase the stamping depth of the fins, so that the fin holes are formed multiple times. This prevents the large deformation caused by a single stamping from tearing the material and improves the yield of fins. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the distribution of the mold head assembly in an embodiment of the present invention; Figure 3 This is a front view schematic diagram of some structures in an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection between the delay tooth rod and the elastic telescopic rod in an embodiment of the present invention; Figure 5 This is a schematic diagram of the distribution of the upper and lower frames in an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the end plate and the stamping column plate in an embodiment of the present invention; Figure 7 This is a top-view exploded view of some structures in an embodiment of the present invention; Figure 8 This is an exploded view of some structures in an embodiment of the present invention; Figure 9 This is a schematic diagram of the distribution of the upper and lower track slots in an embodiment of the present invention; Figure 10 This is a front view schematic diagram of some structures in an embodiment of the present invention.

[0025] Reference numerals: 1. Equipment platform; 2. Hydraulic impact table; 3. Material moving lower mold table; 4. Impact assembly; 41. Impact frame; 42. Delay frame; 43. Tooth groove; 44. Delay tooth rod; 45. Elastic telescopic rod; 46. Bending lifting plate; 5. Mold guide pillar; 6. Mold head assembly; 61. Upper frame; 62. Lower frame; 63. Central mold pillar; 64. End plate; 65. Stamping gap plate; 66. Stamping column plate; 661. Limiting vertical plate; 662. Central cone; 67. Upper track groove; 68. Lower track groove. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0027] This invention discloses an adaptive precision mold for heat sink fin forming. For example... Figures 1-10 As shown, the equipment includes a machine base 1 and a hydraulic impact table 2. The machine base 1 has a through cavity. The hydraulic impact table 2 is installed inside the cavity of the machine base 1. A material moving lower mold table 3 is installed on the bottom wall of the cavity of the machine base 1. An impact component 4 that can be extended and retracted is provided on the upper side of the material moving lower mold table 3. The upper end of the impact component 4 is connected to the impact extension end of the hydraulic impact table 2. The hydraulic impact table 2 drives the impact component 4 to move up and down. A feeding device for conveying fin material is installed on one side of the machine base 1. When the hydraulic impact table 2 drives the impact component 4 to move up and down, the feeding device stops controlling the movement of the fins to prevent the fins from being subjected to lateral pressure during the impact.

[0028] Multiple vertically arranged mold guide columns 5 are installed inside the cavity of the equipment platform 1. The two ends of the impact component 4 are fitted onto the outside of the mold guide columns 5. The lower telescopic end of the impact component 4 is in damped contact with the mold guide column 5. The mold guide column 5 drives the upper end of the impact component 4 to move up and down, and the lower end of the impact component 4 moves with a delay.

[0029] The impact assembly 4 includes an impact frame 41 and a delay frame 42. The delay frame 42 is located below the impact frame 41. Both the delay frame 42 and the impact frame 41 are slidably sleeved on the outside of each mold guide post 5. Each mold guide post 5 has a toothed groove 43. The toothed groove 43 engages with a delay toothed rod 44. An elastic telescopic rod 45 is fixed to the other end of the delay toothed rod 44. The other end of the elastic telescopic rod 45 is fixed to the delay frame 42. The upper and lower surfaces of the end of the delay toothed rod 44 that engages with the toothed groove 43 are inclined surfaces. The elastic force of the elastic telescopic rod 45 pushes the delay toothed rod 44 to engage with the toothed groove 43, providing resistance to the movement of the delay frame 42. When the impact frame 41 moves downward, the distance between the delay frame 42 and the impact frame 41 becomes smaller and smaller under the resistance. When the impact frame 41 moves upward, the distance between the delay frame 42 and the impact frame 41 becomes larger and larger under the resistance.

[0030] Multiple die head assemblies 6 are provided on the upper side of the material moving die table 3. The die head assembly 6 can be tightened towards its axis and expanded away from its axis to form a complete cylindrical surface. The upper end of the die head assembly 6 is connected to the upper and lower telescopic ends of the impact assembly 4.

[0031] Both the delay frame 42 and the impact frame 41 are connected to the die head assembly 6. The impact frame 41 is equipped with a bending lifting plate 46. One end of the bending lifting plate 46 is located on the lower side of the delay frame 42 and bends towards the lower side of the delay frame 42. When the impact frame 41 moves upward, the delay frame 42 and the impact frame 41 gradually separate. When the bent end of the bending lifting plate 46 contacts the delay frame 42, the impact frame 41 drives the delay frame 42 to move upward synchronously through the bending lifting plate 46.

[0032] As the impact assembly 4 moves downward, the die head assembly 6 first expands into a complete cylindrical surface before moving. As the impact assembly 4 moves upward, the die head assembly 6 first tightens towards its axis to reduce the maximum outer diameter. The lower height of multiple die head assemblies 6 is set to rise in a stepped manner. When multiple die head assemblies 6 simultaneously punch downward, the fins on the lower side are punched to different degrees. The fins move the distance between two adjacent punching holes each time under the conveyor. During the alternating movement of the fins and the die head assembly 6, the holes of the fins are punched and formed multiple times to prevent large deformation caused by one-time punching, which could result in tearing damage to the fins.

[0033] The die assembly 6 includes an upper frame 61 and a lower frame 62. The lower frame 62 is located below the upper frame 61. The two ends of the upper frame 61 are fixed to the impact frame 41, and the two ends of the lower frame 62 are fixed to the delay frame 42.

[0034] The mold head assembly 6 also includes a central mold column 63 and an end plate 64. The upper frame 61 is fixed to the central mold column 63, and the lower frame 62 is fixed to the end plate 64. The end plate 64 is coaxially slidably sleeved on the outside of the central mold column 63.

[0035] The upper frame 61 and the lower frame 62 are detachably connected to the impact frame 41 and the delay frame 42 by bolts. By loosening the bolts of the upper frame 61 and the lower frame 62, the distance between adjacent upper frames 61 can be changed, and fin holes of different distances can be punched out. The impact frame 41 and the delay frame 42 are composed of a rod-like structure connected by bolts. Loosening the bolts can separate the impact frame 41 and the delay frame 42, and remove the upper frame 61 and the lower frame 62.

[0036] Multiple stamped column plates 66 and multiple stamped slotted plates 65 are slidably inserted around the central mold column 63 on the bottom surface of the end plate 64. The number of stamped column plates 66 and stamped slotted plates 65 is equal, and the multiple stamped column plates 66 and multiple stamped slotted plates 65 are staggered around the axis of the central mold column 63. The upper ends of the stamped column plates 66 and stamped slotted plates 65 are elastically connected to the end plate 64. The end plate 64 has corresponding sliding grooves at the connection between the stamped column plates 66 and the stamped slotted plates 65, and the axis of the grooves intersects perpendicularly with the axis of the end plate 64. The stamped column plates 66, the stamped slotted plates 65 and the end plate 64 are all connected by tension springs, which have the function of pulling the stamped slotted plates 65 and the stamped column plates 66 toward the end plate 64.

[0037] The outer ring surface of the central die post 63 is provided with an upper track groove 67 at each stamping slot plate 65, and the outer ring surface of the central die post 63 is provided with a lower track groove 68 at each stamping column plate 66. The upper end of the upper track groove 67 is located above the upper end of the horizontally adjacent lower track groove 68. When the central die post 63 moves upward, the stamping slot plate 65 first moves towards the axis of the central die post 63, so that a gap is formed between the adjacent stamping column plates 66. Then, when the central die post 63 continues to move upward, the stamping column plates 66 enter the lower track groove 68, so that a gap is formed between the stamping column plates 66 and the hole stamped by the fin. When the stamping column plates 66 and the stamping slot plates 65 separate from the hole of the fin, they will not exert an upward thrust on the fin. The depth of the upper track groove 67 is greater than the depth of the lower track groove 68, and the distance that the stamping slot plates 65 move towards the central die post 63 is greater than the tendency of the stamping column plates 66 to move towards the central die post 63.

[0038] Both the stamping column plate 66 and the stamping slot plate 65 have at least two protrusions on the side near the central die column 63. The number and height of the protrusions on the surfaces of the stamping column plate 66 and the stamping slot plate 65 are the same. The number of upper track grooves 67 and lower track grooves 68 on the surface of the central die column 63 are respectively matched with the number of protrusions on the stamping slot plate 65 and the stamping column plate 66. The multiple protrusions on the sides of the stamping column plate 66 and the stamping slot plate 65 prevent the force on the stamping column plate 66 and the stamping slot plate 65 from being concentrated at one point, effectively preventing the stamping column plate 66 and the stamping slot plate 65 from tilting, and preventing the force concentration at the connection between the stamping column plate 66 and the stamping slot plate 65 and the end plate 64 from causing breakage.

[0039] The upper ends of the upper track groove 67 and the lower track groove 68 are both inclined surfaces, and the bottom surfaces of the upper track groove 67 and the lower track groove 68 on the same circumferential surface are both horizontal surfaces. When the stamping column plate 66 and the stamping clamp plate 65 move upward, the protrusions of the stamping column plate 66 and the stamping clamp plate 65 move to the circumferential surface of the central mold column 63 through the inclined surfaces of the lower track groove 68 and the upper track groove 67, respectively. At this time, a complete cylindrical surface is formed between the multiple stamping column plates 66 and the multiple stamping clamp plates 65. When the stamping column plate 66 and the stamping clamp plate 65 are respectively located in the planar positions of the lower track groove 68 and the upper track groove 67, the lower end of the bending lifting plate 46 contacts the delay frame 42.

[0040] A gap larger than the width of the stamping gap plate 65 is provided between two adjacent stamping column plates 66 near the central mold column 63, allowing the stamping gap plate 65 to move towards the axis of the central mold column 63. When the stamping gap plate 65 moves between the two stamping column plates 66, there is space for the stamping column plates 66 to move on both sides of the stamping gap plate 65, allowing the stamping column plates 66 to move further towards the central mold column 63. Limiting vertical plates 661 are provided on both sides of the stamping column plates 66 and both sides of the stamping gap plate 65. The upper end of the limiting vertical plate 661 is fixed to the end plate 64, and the limiting vertical plate 661 slides in contact with the central mold column 63. The limiting vertical plate 661 limits the movement of the stamping column plates 66 and the stamping gap plate 65, ensuring that the stamping column plates 66 and the stamping gap plate 65 will not deviate when they move.

[0041] Both the stamping column plate 66 and the stamping slot plate 65 have tapered surfaces at their lower ends. A central cone head 662 is provided on the lower side of the central die column 63. The upper surface of the central cone head 662 is fixed to the limiting vertical plate 661. The central part of the central cone head 662 is a plane that matches the lower end of the central die column 63, so that the central die column 63 can apply a stable thrust to the central cone head 662. When the tapered central cone head 662 contacts the fin downwards, it positions the hole for stamping the fin and facilitates the deformation of the stamped hole from the center.

[0042] When the protrusions of the multiple stamping column plates 66 and the multiple stamping slot plates 65 disengage from the lower track groove 68 and the upper track groove 67 respectively, the side of the multiple stamping column plates 66 and the multiple stamping slot plates 65 away from the central mold column 63 forms a complete cylindrical surface coaxial with the central mold column 63. The upper surface of the central cone 662 is in contact with the lower cone surface of the stamping column plates 66 and the stamping slot plates 65. When the stamping column plates 66 and the stamping slot plates 65 form a complete cylindrical surface, the lower ends of the central cone 662, the stamping column plates 66 and the stamping slot plates 65 form cones.

[0043] The working principle is as follows: The fins to be processed are placed on the upper side of the material moving mold table 3. The hydraulic impact table 2 drives the impact component 4 to move up and down. When the impact component 4 moves downward, the die head component 6 first expands outward into a complete cylindrical surface. Then the die head component 6 follows the impact component 4 to move downward to process the fins on the lower side. When the hydraulic impact table 2 drives the impact component 4 to move upward, the die head component 6 first tightens and separates from the inner diameter of the punched fin hole. Then the die head component 6 follows the impact component 4 to move upward, so that the fins are not subjected to the damping force on the upper side of the die head component 6. The fins will not bend under force when they separate from the die head component 6.

[0044] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An adaptive precision mold for heat sink fin forming, comprising a machine base (1) and a hydraulic impact table (2), wherein the machine base (1) has a through cavity, and the hydraulic impact table (2) is installed inside the cavity of the machine base (1), characterized in that: The bottom wall of the cavity of the equipment base (1) is equipped with a material moving lower mold platform (3). The upper side of the material moving lower mold platform (3) is provided with a telescopic impact component (4). The upper end of the impact component (4) is connected to the impact telescopic end of the hydraulic impact platform (2). The hydraulic impact platform (2) drives the impact component (4) to move up and down. Multiple vertically arranged mold guide columns (5) are installed inside the cavity of the equipment base (1). The two ends of the impact component (4) are fitted and sleeved on the outside of the mold guide column (5). The lower telescopic end of the impact component (4) is in damped contact with the mold guide column (5). The mold guide column (5) drives the upper end of the impact component (4) to move up and down, and the lower end of the impact component (4) moves with a delay. Multiple die head assemblies (6) are provided on the upper side of the material moving lower die table (3). The die head assembly (6) can be tightened towards its axis and expanded away from its axis to form a complete cylindrical surface. The upper end of the die head assembly (6) is connected to the upper and lower telescopic ends of the impact assembly (4). When the impact assembly (4) moves downward, the die head assembly (6) first expands into a complete cylindrical surface and then moves. When the impact assembly (4) moves upward, the die head assembly (6) first tightens towards its axis to reduce the maximum outer diameter. The lower end height of the multiple die head assemblies (6) is set to rise in a stepped manner.

2. The adaptive precision mold for heat sink fin forming according to claim 1, characterized in that: The impact assembly (4) includes an impact frame (41) and a delay frame (42). The delay frame (42) is located below the impact frame (41). The delay frame (42) and the impact frame (41) are slidably sleeved on the outside of each mold guide post (5). Each mold guide post (5) is provided with a toothed groove (43). The toothed groove (43) meshes with a delay toothed rod (44). An elastic telescopic rod (45) is fixed at the other end of the delay toothed rod (44). The other end of the elastic telescopic rod (45) is fixed to the delay frame (42). Both the delay frame (42) and the impact frame (41) are connected to the die head assembly (6). The impact frame (41) is equipped with a bending lifting plate (46), which is located on the lower side of the delay frame (42) and bends towards the lower side of the delay frame (42).

3. The adaptive precision mold for heat sink fin forming according to claim 2, characterized in that: The die assembly (6) includes an upper frame (61) and a lower frame (62). The lower frame (62) is located below the upper frame (61). The two ends of the upper frame (61) are fixed to the impact frame (41), and the two ends of the lower frame (62) are fixed to the delay frame (42). The mold head assembly (6) also includes a central mold column (63) and an end plate (64). The upper frame (61) is fixed to the central mold column (63), and the lower frame (62) is fixed to the end plate (64). The end plate (64) is coaxially slidably sleeved on the outside of the central mold column (63). The bottom surface of the end plate (64) is slidably inserted around the central mold column (63) with multiple stamped column plates (66) and multiple stamped slot plates (65). The number of stamped column plates (66) and stamped slot plates (65) is equal. The multiple stamped column plates (66) and multiple stamped slot plates (65) are staggered around the axis of the central mold column (63). The upper ends of the stamped column plates (66) and stamped slot plates (65) are elastically connected to the end plate (64).

4. The adaptive precision mold for heat sink fin forming according to claim 3, characterized in that: The outer ring surface of the central mold column (63) is provided with an upper track groove (67) at each stamping slot plate (65), and the outer ring surface of the central mold column (63) is provided with a lower track groove (68) at each stamping column plate (66). The upper end of the upper track groove (67) is located above the upper end of the horizontally adjacent lower track groove (68), and the depth of the upper track groove (67) is greater than the depth of the lower track groove (68).

5. The adaptive precision mold for heat sink fin forming according to claim 4, characterized in that: Both the stamping column plate (66) and the stamping slit plate (65) have at least two protrusions on the side near the central die column (63). The number and height of the protrusions on the surfaces of the stamping column plate (66) and the stamping slit plate (65) are the same. The number of upper track grooves (67) and lower track grooves (68) on the surface of the central die column (63) are adapted to the number of protrusions on the stamping slit plate (65) and the number of protrusions on the stamping column plate (66), respectively.

6. The adaptive precision mold for heat sink fin forming according to claim 4, characterized in that: A gap larger than the width of the stamping gap plate (65) is provided between two adjacent stamping column plates (66) near the end of the central mold column (63). Limiting vertical plates (661) are provided on both sides of the stamping column plate (66) and both sides of the stamping gap plate (65). The upper end of the limiting vertical plate (661) is fixed to the end plate (64), and the limiting vertical plate (661) slides in contact with the central mold column (63).

7. The adaptive precision mold for heat sink fin forming according to claim 6, characterized in that: The lower ends of the stamping column plate (66) and the stamping slit plate (65) are both set as conical surfaces, and a central cone head (662) is provided on the lower side of the central mold column (63). The upper surface of the central cone head (662) is fixed to the limiting vertical plate (661).

8. The adaptive precision mold for heat sink fin forming according to claim 7, characterized in that: When the protrusions of the multiple stamping column plates (66) and the multiple stamping slot plates (65) are separated from the lower track groove (68) and the upper track groove (67) respectively, the multiple stamping column plates (66) and the multiple stamping slot plates (65) form a complete cylindrical surface coaxial with the central mold column (63) on the side away from the central mold column (63), and the upper surface of the central cone (662) is in contact with the lower cone surface of the stamping column plates (66) and the stamping slot plates (65).

9. The adaptive precision mold for heat sink fin forming according to claim 3, characterized in that: The upper frame (61) and lower frame (62) are detachably connected to the impact frame (41) and delay frame (42) respectively by bolts. The impact frame (41) and delay frame (42) are composed of rod-shaped structures connected by bolts.

10. An adaptive precision mold for heat sink fin forming according to claim 5, characterized in that: The upper ends of the upper track groove (67) and the lower track groove (68) are both inclined surfaces, and the bottom surfaces of the upper track groove (67) and the lower track groove (68) on the same circumference are both horizontal surfaces.

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