A heat sink fin stamping die and a stamping forming equipment thereof

Abstract

This invention provides 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 away from the upper shearing strip from the upper stamping extension strip. This invention uses stamping technology to achieve rapid one-piece forming of thinner fins, greatly improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of mechanical processing technology and relates to a radiator fin stamping die and its stamping forming equipment. 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.

[0003] Currently, the main processing methods for heat sink fins include stamping, extrusion forming, insert assembly, and planing. Among these, stamping is commonly used to manufacture metal fins with a thickness of 0.2 mm or more due to its mature technology, low cost, and high production efficiency, making it suitable for mass production of relatively simple heat sink components. However, due to limitations in die strength and material springback, traditional stamping cannot achieve precision structures with fin thicknesses below 0.15 mm or high aspect ratios, thus restricting its application in high-performance heat sink applications.

[0004] To overcome these limitations, the industry has developed two types of high-density fin manufacturing technologies: insert-type and planing-formed. The insert-type process prepares ultra-thin fins (down to 0.1 mm) through stamping or etching, then inserts them into a grooved substrate and fixes them using methods such as tube expansion, welding, or brazing. While this method can achieve extremely thin wall thicknesses, there is significant interfacial contact thermal resistance between the fins and the substrate, significantly weakening the overall thermal conductivity. Furthermore, subsequent assembly processes are complex, and consistency is difficult to guarantee. On the other hand, the planing-formed technology uses specialized tools to continuously plan out integral ultra-thin fins directly from solid metal blanks (such as copper or aluminum). This allows for high-density structures with fin thicknesses as low as 0.1 mm and spacing less than 1 mm, with no interface between the fins and the substrate, resulting in a continuous heat conduction path. However, this process requires extremely high equipment precision, involves large equipment investment, has low processing efficiency, and low material utilization (a large amount of metal is removed by cutting), making it difficult to meet the demands of low-cost, large-scale production. Summary of the Invention

[0005] The purpose of this invention is to provide a heat sink fin stamping die and its stamping forming equipment, which uses a stamping process to achieve rapid one-piece forming of thinner fins, with high processing efficiency, and can meet the needs of low-cost, large-scale production.

[0006] To solve the above technical problems, the present invention provides a heat sink fin stamping die, including an upper die and a lower die arranged opposite to each other. An upper pressure plate frame is movably connected to the lower side of the upper die, and an upper support spring is connected between the upper die and the upper pressure plate frame. A lower pressure plate frame is movably connected to the upper side of the lower die, and a lower support spring is connected between the lower die and the lower pressure plate frame.

[0007] The upper die has an upper shearing strip that can pass through the upper pressure plate frame on one side of its lower end. The lower pressure plate frame has a lower limiting groove that cooperates with the upper shearing strip on one side of its upper end. The lower die has a lower shearing strip that can pass through the lower pressure plate frame on one side of its upper end. The upper shearing strip and the lower shearing strip are connected end to end in the horizontal plane. The upper pressure plate frame has an upper limiting groove that cooperates with the lower shearing strip on one side.

[0008] The lower end of the upper die has multiple upper stamping extension strips evenly spaced downwards on one side of the upper shearing strip. The lower pressure plate frame has multiple lower support grooves that correspond one-to-one with the upper stamping extension strips. The upper end of the lower die has multiple lower stamping extension strips evenly spaced upwards on one side of the lower shearing strip. The upper pressure plate frame has multiple upper support grooves that correspond one-to-one with the lower stamping extension strips.

[0009] A pressing strip is provided at the lower end of the upper pressure plate frame, at a point away from the upper shearing strip on the upper stamping extension strip.

[0010] By adopting the above technical solution, during the mold closing stage, when the upper mold is descending, the upper pressure plate and the lower pressure plate first contact the sheet metal under the action of the support spring and form a clamping and fixing. Through the guiding action of the upper sliding shaft and the lower sliding shaft, it is ensured that the sheet metal has no lateral displacement during the stamping process.

[0011] In the shearing and forming stage, the upper shearing strip cooperates with the lower limiting groove, and the lower shearing strip cooperates with the upper limiting groove. Through the upper and lower opposing shearing, a stamping groove connected end to end is formed on the plate. Simultaneously, the plate is stamped into vertically downward fins and vertically upward connecting pieces, realizing the integrated forming of fins and connecting pieces.

[0012] During the rolling stage, the upper stamping extension strip moves downwards, and after the fins enter the lower support groove, the upper stamping extension strip progressively extends the fins during the die closing process. Simultaneously, the lower stamping extension strip moves upwards, and after the connecting piece enters the upper support groove, the lower stamping extension strip symmetrically extends the connecting piece. Through the cooperation of multiple sets of stamping extension strips with gradually varying spacing and support grooves, the fins and connecting pieces gradually reach the designed height in multiple stamping cycles, ultimately completing the precision forming of the heat dissipation fins.

[0013] During the heat sink forming stage, in the next round of pressing down, the pressing strip can press the connecting piece further down into the stamping groove, thereby covering it.

[0014] The present invention is further configured such that a plurality of upper sliding holes are provided through the edge of the upper mold, and a plurality of upper sliding shafts corresponding one-to-one with the upper sliding holes are provided on the edge of the upper pressure plate frame. The upper end of each upper sliding shaft extends out of the corresponding upper sliding hole and is provided with an upper limit cap. Each upper sliding shaft is fitted with an upper support spring located between the upper mold and the upper pressure plate frame.

[0015] The present invention is further configured such that a plurality of sliding holes are provided through the edge of the lower mold, and a plurality of sliding shafts corresponding one-to-one with the sliding holes are provided downward on the edge of the lower pressure plate frame. The lower end of each sliding shaft extends out of the corresponding sliding hole and is provided with a lower limit cap. Each sliding shaft is fitted with a lower support spring located between the lower mold and the lower pressure plate frame.

[0016] The present invention is further configured such that, in the direction away from the upper shearing strip, the distance between the upper stamping extension strip and the inner wall of the lower support groove near the upper shearing strip gradually decreases, and in the direction away from the lower shearing strip, the distance between the lower stamping extension strip and the inner wall of the upper support groove near the lower shearing strip gradually decreases.

[0017] The present invention is further configured such that each upper stamping extension bar is rotatably connected to an upper roller shaft arranged along its width direction at its lower end near the upper shearing bar, and each lower stamping extension bar is rotatably connected to a lower roller shaft arranged along its width direction at its upper end near the lower shearing bar.

[0018] The present invention is further configured such that a bending strip is provided downward at the lower end of the upper pressure plate frame between the upper stamping extension strip furthest from the upper shear strip and the pressing strip, the lower end of the bending strip being a slanted opening inclined downward away from the pressing strip, and the distance between the bending strip and the upper stamping extension strip furthest from the upper shear strip and the distance between the bending strip and the pressing strip being equal to the distance between two adjacent upper stamping extension strips.

[0019] The present invention also discloses a heat sink fin stamping and forming equipment, including a frame, two horizontally arranged opposite horizontal support bars in the middle of the frame, a stamping platform at the entrance of the frame connected to one end of the two horizontal support bars and at the same height, and multiple belt conveyors distributed along their length direction are installed above each horizontal support bar on the frame. Each belt conveyor includes a conveyor belt arranged along the length direction of the horizontal support bar, two drive shafts respectively arranged at both ends of the conveyor belt and rotatably connected to the edge of the frame, and a conveyor motor installed on the outside of the frame for driving the drive shafts to rotate.

[0020] The upper mold and the lower mold are located on the upper and lower sides of the middle of the two horizontal support bars, respectively. The top of the frame is equipped with multiple first hydraulic telescopic cylinders above the middle of the two horizontal support bars. The telescopic shaft of each first hydraulic telescopic cylinder is connected downward to the upper end of the upper mold. Multiple first upper transmission racks are arranged downward on both sides of the upper mold perpendicular to the horizontal support bars. Multiple first lower transmission racks are arranged upward on both sides of the lower mold perpendicular to the horizontal support bars, corresponding one-to-one with the first upper transmission racks. A first transmission gear that meshes with each of the two is rotatably connected between the outer side of each horizontal support bar and between each pair of opposite first upper transmission racks and first lower transmission racks.

[0021] Multiple second hydraulic telescopic cylinders are installed downwards on the top of the frame on the side of the horizontal support bar away from the stamping platform. The lower ends of the telescopic shafts of the multiple second hydraulic telescopic cylinders are connected to a horizontally arranged upper stamping shear plate. A lower stamping shear plate is arranged below the upper stamping shear plate inside the frame, and it cooperates with the upper stamping shear plate. The upper stamping shear plate has an upper shearing blade arranged downwards, and the lower stamping shear plate has a lower support bar arranged upwards, which cooperates with the upper shearing blade. The upper stamping shear plate has a second upper transmission rack arranged downwards on both sides perpendicular to the horizontal support bar, and the lower stamping shear plate has a second lower transmission rack arranged upwards on both sides perpendicular to the horizontal support bar, which corresponds one-to-one with the second upper transmission rack. A second transmission gear that meshes with each of the two pairs of opposite second upper and second lower transmission racks is rotatably connected to the outer side of each horizontal support bar.

[0022] By adopting the above technical solution, the working principle of the radiator fin stamping and forming equipment mainly covers several key stages, including plate conveying, mold closing, fin stamping and forming, and cutting.

[0023] During the sheet material conveying stage, the sheet material is placed on the stamping platform and pushed forward to the belt conveyor on the horizontal support bar. The belt conveyor above the horizontal support bar is driven by a conveyor motor, and the lower side of the conveyor belt contacts the upper surface of the sheet material, forming a bidirectional conveying force to stably convey the sheet material to the stamping station.

[0024] During the mold closing stage, the two first hydraulic telescopic cylinders extend downwards simultaneously, pushing the upper mold vertically downwards. The first upper drive racks on both sides of the upper mold and the first lower drive racks on both sides of the lower mold mesh with the first drive gears, converting the linear motion of the hydraulic cylinders into symmetrical opposite motion of the upper and lower molds. The first vertical slide groove guides and constrains the drive racks, ensuring that the upper and lower molds remain parallel during the mold closing process, avoiding mold damage or fin forming defects caused by uneven load. When the upper and lower pressure plates contact the sheet metal, the upper and lower support springs are compressed, forming a flexible clamping of the sheet metal to prevent displacement of the sheet metal during stamping.

[0025] The fin stamping process is divided into two steps: shearing and rolling. During shearing, the upper shearing strip engages with the lower limiting groove, and the lower shearing strip engages with the upper limiting groove. Through opposing shearing actions, end-to-end stamping grooves are formed on the sheet metal, simultaneously stamping the sheet into vertically downward-facing fins and vertically upward-facing connecting pieces. In the rolling stage, the upper stamping extension strip drives the upper roller shaft downwards. After the fins enter the lower support groove, the upper roller shaft progressively rolls and extends the fins. Simultaneously, the lower stamping extension strip drives the lower roller shaft upwards. After the connecting pieces enter the upper support groove, the lower roller shaft symmetrically rolls and extends the connecting pieces. Multiple sets of stamping extension strips with gradually varying spacing, in conjunction with the support grooves, allow the fins and connecting pieces to gradually reach the designed height through multiple stamping cycles. Subsequently, the bending strip presses downwards, bending the connecting pieces towards the stamping grooves. The pressing strip presses down again, pressing the connecting pieces into and covering the stamping grooves, completing the precision forming of the heat dissipation fins.

[0026] During the cutting and blanking stage, two second hydraulic telescopic cylinders extend downwards simultaneously, pushing the upper stamping shear plate vertically downwards. The second upper drive racks on both sides of the upper stamping shear plate and the second lower drive racks on both sides of the lower stamping shear plate mesh with the second drive gears to ensure parallel movement of the upper and lower shear plates. The upper shearing blade cooperates with the lower support bar to generate shearing force at the connecting piece position, cutting and separating the formed radiator fin assembly from the sheet metal. The second vertical slide guides the drive racks to ensure cutting accuracy. The cut radiator fin assembly is then transferred to the finished product area via a subsequent conveying device, completing the entire stamping and forming process.

[0027] The invention is further configured such that the frame is rotatably connected above the stamping platform by multiple horizontally arranged conveyor shafts, a drive motor is installed outside the frame, the power output shaft of the drive motor is connected to one of the conveyor shafts, one end of each conveyor shaft extends out of the frame and is provided with a transmission pulley, all the transmission pulleys are connected in pairs by a belt, each conveyor shaft is provided with a roller gear at both ends of the stamping platform, each roller gear corresponds to the position of the conveyor belt on the corresponding side, and the tooth height of the outer hobbing teeth of the roller gear gradually increases towards the horizontal support bar.

[0028] The present invention is further configured such that each conveyor belt is provided with a conveyor rack on its outer periphery that engages with the hobbing teeth on the outer periphery of the roller pressing gear.

[0029] The present invention is further configured such that a first vertical groove is provided at each first transmission gear on the top of the frame, and each first vertical groove is slidably connected to a corresponding first upper transmission rack and a corresponding first lower transmission rack; and a second vertical groove is provided at each second transmission gear on the top of the frame, and each second vertical groove is slidably connected to a corresponding second upper transmission rack and a corresponding second lower transmission rack.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Firstly, this invention achieves efficient and precise stamping of radiator fins through a unique mold design. The relative arrangement of the upper and lower dies in the mold, along with the upper and lower pressure plate frames and supporting springs, ensures stable clamping of the sheet metal during stamping, effectively preventing displacement and thus improving stamping accuracy and fin quality. Simultaneously, the ingenious coordination of the upper and lower shearing strips, upper stamping extension strips, and lower stamping extension strips enables the fins and connecting pieces to be integrally formed, ultimately achieving rapid one-piece forming of thinner fins and significantly improving production efficiency.

[0032] Secondly, the stamping equipment in this invention employs an advanced transmission mechanism and hydraulic system, achieving precise mold closing and precision stamping of the fins. Through the synchronous control of the first and second hydraulic telescopic cylinders, and the meshing transmission of the transmission rack and gear, the symmetrical opposite movement of the upper and lower dies is ensured, making the stamping process smoother and more reliable. Furthermore, the design of the belt conveyor, conveyor shaft, and roller gears in the equipment further improves the stability of sheet metal conveying and the precision of stamping. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of the upper mold;

[0035] Figure 3 This is a schematic diagram of the overall structure of the upper pressure plate frame;

[0036] Figure 4 This is a schematic diagram of the overall structure of the lower mold;

[0037] Figure 5 This is a schematic diagram of the overall structure of the lower pressure plate frame;

[0038] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0039] Figure 7 Mainly used to display belt conveyors on horizontal support bars and roller-pressed gears on stamping platforms;

[0040] Figure 8 Used to demonstrate the correspondence between the upper and lower stamping shearing plates.

[0041] The components are as follows: 1. Upper die; 2. Lower die; 3. Upper pressure plate frame; 4. Upper sliding hole; 5. Upper sliding shaft; 6. Upper limit cap; 7. Upper support spring; 8. Lower pressure plate frame; 9. Lower sliding hole; 10. Lower sliding shaft; 11. Lower limit cap; 12. Lower support spring; 13. Upper shearing strip; 14. Lower limit groove; 15. Lower shearing strip; 16. Upper limit groove; 17. Upper stamping extension strip; 18. Lower support groove; 19. Upper roller pressure shaft; 20. Lower stamping extension strip; 21. Upper support groove; 22. Lower roller pressure shaft; 23. Pressing strip; 24. Bending strip; 25. Frame; 26. Horizontal support strip; 27. Stamping platform. 28. Conveyor belt; 29. ​​Drive shaft; 30. Conveyor motor; 31. Conveyor shaft; 32. Drive motor; 33. Roller gear; 34. First hydraulic telescopic cylinder; 35. First upper transmission rack; 36. First lower transmission rack; 37. First transmission gear; 38. First vertical chute; 39. Second hydraulic telescopic cylinder; 40. Upper stamping shearing plate; 41. Lower stamping shearing plate; 42. Upper shearing blade; 43. Lower support bar; 44. Second upper transmission rack; 45. Second lower transmission rack; 46. Second transmission gear; 47. Second vertical chute; 48. Transmission pulley; 49. Belt. Detailed Implementation

[0042] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the heat sink fin stamping die and its stamping equipment according to the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0043] Example 1, referring to Figure 1-5 This paper introduces a heat sink fin stamping die, which includes an upper die 1 and a lower die 2 arranged opposite to each other. A hollowed-out upper pressure plate frame 3 is movably connected to the lower side of the upper die 1. The upper die 1 has multiple upper sliding holes 4 along its edge, and multiple upper sliding shafts 5 corresponding one-to-one with the upper sliding holes 4 are arranged upwards along the edge of the upper pressure plate frame 3. The upper end of each upper sliding shaft 5 extends out of the corresponding upper sliding hole 4 and is equipped with an upper limit cap 6. Each upper sliding shaft 5 is fitted with an upper support spring 7 located between the upper die 1 and the upper pressure plate frame 3, ensuring that the upper pressure plate frame 3 contacts the sheet metal first during stamping.

[0044] A hollowed-out lower pressure plate frame 8 is movably connected to the upper side of the lower die 2. The lower die 2 has multiple sliding holes 9 on its edge, and multiple sliding shafts 10 corresponding to the sliding holes 9 are set downwards on the edge of the lower pressure plate frame 8. The lower end of each sliding shaft 10 extends out of the corresponding sliding hole 9 and is equipped with a lower limit cap 11. Each sliding shaft 10 is fitted with a lower support spring 12 located between the lower die 2 and the lower pressure plate frame 8, ensuring that the lower pressure plate frame 8 contacts the sheet metal first during stamping, and the upper pressure plate frame 3 cooperates with the lower pressure plate frame 8 to clamp the sheet metal.

[0045] An upper shearing strip 13, capable of passing through the upper pressure plate 3, is provided on one side of the lower end of the upper die 1. A lower limiting groove 14, which mates with the upper shearing strip 13, is provided on the lower pressure plate 8. The upper shearing strip 13 and the lower limiting groove 14 work together to stamp the sheet metal into fins that are bent downwards to a vertical position. A lower shearing strip 15, capable of passing through the lower pressure plate 8, is provided on one side of the upper end of the lower die 2. The upper shearing strip 13 and the lower shearing strip 15 are connected end to end in the horizontal plane. An upper limiting groove 16, which mates with the lower shearing strip 15, is provided on the upper pressure plate 3. The upper shearing strip 13 and the upper limiting groove 16 work together to stamp the sheet metal into connecting pieces that are bent upwards to a vertical position. The upper shearing strip 13 and the lower shearing strip 15 shear upwards and downwards, causing the fins and connecting pieces to bend upwards and downwards respectively, forming a stamping groove on the sheet metal.

[0046] Four upper stamping extension strips 17 are evenly spaced downwards on one side of the upper shearing strip 13 at the lower end of the upper die 1. Four lower support grooves 18, corresponding one-to-one with the upper stamping extension strips 17, are provided downwards on the lower pressure plate frame 8. The distance between the upper stamping extension strips 17 and the lower support grooves 18 near the inner wall of the upper shearing strip 13 gradually decreases in the direction away from the upper shearing strip 13. Each upper stamping extension strip 17 is rotatably connected to an upper roller 19 arranged along its width direction at its lower end near the upper shearing strip 13. When the upper stamping extension strips 17 stamp downwards, the fins extend into the lower support grooves 18 and are supported by them. The upper roller 19 rolls the fins downwards, extending and lengthening them. Through multiple rolls, the desired fin height is achieved.

[0047] Four lower stamping extension strips 20 are evenly spaced upwards on one side of the lower shearing strip 15 at the upper end of the lower die 2. Four upper support grooves 21, corresponding one-to-one with the lower stamping extension strips 20, are arranged upwards on the upper pressure plate frame 3. The distance between the lower stamping extension strips 20 and the inner walls of the upper support grooves 21 near the lower shearing strip 15 gradually decreases in the direction away from the lower shearing strip 15. Each lower stamping extension strip 20 is rotatably connected to a lower roller shaft 22 along its width direction at its upper end near the lower shearing strip 15. When the lower stamping extension strips 20 stamp upwards, the connecting piece extends into the upper support groove 21 and is supported by it. The lower roller shaft 22 rolls the connecting piece upwards, extending it. Through multiple rolls, the height of the connecting piece becomes equal to the width of the stamping groove.

[0048] A pressing strip 23 is provided downwards at the lower end of the upper pressure plate frame 3, away from the upper shearing strip 13 on the upper stamping extension strip 17. A bending strip 24 is provided downwards between the upper stamping extension strip 17 furthest from the upper shearing strip 13 and the pressing strip 23 at the lower end of the upper pressure plate frame 3. The lower end of the bending strip 24 is a beveled opening that slopes downwards away from the pressing strip 23. The distance between the bending strip 24 and the upper stamping extension strip 17 furthest from the upper shearing strip 13, and the distance between the bending strip 24 and the pressing strip 23, are equal to the distance between two adjacent upper stamping extension strips 17. When the bending strip 24 is pressed downwards, it can bend the connecting piece towards the corresponding stamping groove. When the pressing strip 23 is pressed downwards again, it can press the connecting piece downwards into the stamping groove to cover it.

[0049] The working principle of the heat sink fin stamping die is as follows: During the die closing stage, as the upper die 1 moves downward, the upper pressure plate 3 and the lower pressure plate 8 first contact the plate and form a clamping and fixing under the action of the support spring. Through the guiding action of the upper sliding shaft 5 and the lower sliding shaft 10, it is ensured that the plate does not have lateral displacement during the stamping process.

[0050] In the shearing and forming stage, the upper shearing strip 13 cooperates with the lower limiting groove 14, and the lower shearing strip 15 cooperates with the upper limiting groove 16. Through the upper and lower opposite shearing, a stamping groove connected end to end is formed on the plate. At the same time, the plate is stamped into vertically downward fins and vertically upward connecting pieces, realizing the integrated forming of fins and connecting pieces.

[0051] During the extended rolling stage, the upper stamping extension strip 17 drives the upper roller 19 downward. After the fins enter the lower support groove 18, the upper roller 19 progressively rolls and extends the fins as the mold closes. Simultaneously, the lower stamping extension strip 20 drives the lower roller 22 upward. After the connecting piece enters the upper support groove 21, the lower roller 22 symmetrically rolls and extends the connecting piece. Through the cooperation of multiple sets of stamping extension strips with gradually varying spacing and support grooves, the fins and connecting pieces gradually reach the designed height in multiple stamping cycles, ultimately completing the precision forming of the heat dissipation fins.

[0052] During the heat sink forming stage, when the bending strip 24 is pressed downwards, it can bend the connecting piece toward the corresponding stamping groove. Subsequently, during the next round of pressing by the pressing strip 23, the pressing strip 23 can press the connecting piece further downwards into the stamping groove, thereby achieving coverage.

[0053] Example 2, refer to Figure 6-8This paper introduces a heat sink fin stamping and forming equipment. The equipment includes a frame 25, with two opposing horizontal support bars 26 horizontally arranged in the middle of the frame 25. At the entrance of the frame 25, a stamping platform 27, connected to one end of the two horizontal support bars 26 and at the same height, is horizontally arranged. Above each horizontal support bar 26, two belt conveyors 49 distributed along its length are installed on the frame 25. Each belt conveyor 49 includes a conveyor belt 28 arranged along the length of the horizontal support bar 26, two drive shafts 29 located at both ends of the conveyor belt 28 and rotatably connected to the edge of the frame 25, and a conveyor motor 30 mounted on the outside of the frame 25 for driving the drive shafts 29. The lower side of the conveyor belt 28 contacts the sheet metal on the horizontal support bar 26, and the movement of the conveyor belt 28 transports the sheet metal forward.

[0054] The frame 25 is rotatably connected to three horizontally arranged conveyor shafts 31 above the stamping platform 27. A drive motor 32 is mounted outside the frame 25, and its power output shaft is connected to one of the conveyor shafts 31. Each conveyor shaft 31 extends out of the frame 25 at one end and is equipped with a transmission pulley. All transmission pulleys are connected in pairs via belts 49. Each conveyor shaft 31 has a roller gear 33 at both ends of the stamping platform 27. Each roller gear 33 corresponds to the position of the conveyor belt 28 on the corresponding side. The tooth height of the roller gear 33 gradually increases towards the horizontal support bar 26. When the roller gear 33 rotates, it can gradually press deeper grooves into the edge of the sheet metal and convey the sheet metal forward to achieve the purpose of precise sheet metal conveying. Each conveyor belt 28 has a conveyor rack on its outer periphery that cooperates with the outer hobbing of the roller gear 33.

[0055] The upper mold 1 and lower mold 2 are located on the upper and lower sides of the middle of the two horizontal support bars 26, respectively. Two first hydraulic telescopic cylinders 34 are mounted downwards on the top of the frame 25 above the middle of the two horizontal support bars 26, with the telescopic axis of each first hydraulic telescopic cylinder 34 connected downwards to the upper end of the upper mold 1. Two first upper drive racks 35 are arranged downwards on both sides of the upper mold 1 perpendicular to the horizontal support bars 26, and two first lower drive racks 36 are arranged upwards on both sides of the lower mold 2 perpendicular to the horizontal support bars 26, corresponding one-to-one with the first upper drive racks 35. On the outer side of each horizontal support bar 26, a first drive gear 37 is rotatably connected between each pair of opposing first upper drive racks 35 and first lower drive racks 36, meshing with both. Through the connection between the first upper drive racks 35 and first lower drive racks 36 and the first drive gear 37, the upper mold 1 and lower mold 2 can move towards each other. The top of the frame 25 is provided with a first vertical slide groove 38 at each first transmission gear 37, and each first vertical slide groove 38 is slidably connected to the corresponding first upper transmission rack 35 and first lower transmission rack 36.

[0056] Two second hydraulic telescopic cylinders 39 are mounted downwards on the side of the horizontal support bar 26 away from the stamping platform 27 at the top of the frame 25. The lower ends of the telescopic shafts of the multiple second hydraulic telescopic cylinders 39 are connected to a horizontally positioned upper stamping shear plate 40. Inside the frame 25, below the upper stamping shear plate 40, is a lower stamping shear plate 41 that cooperates with it. The upper stamping shear plate 40 has an upper shearing blade 42 pointing downwards, and the lower stamping shear plate 41 has a lower support bar 43 pointing upwards, cooperating with the upper shearing blade 42. When cutting the heat sink fins, the lower support bar 43 supports the connecting piece below, and the upper shearing blade 42, when pointing downwards, cooperates to cut off a section of the heat sink. On both sides of the upper stamping shear plate 40, perpendicular to the horizontal support bar 26, a second upper drive rack 44 points downwards. On both sides of the lower stamping shear plate 41, perpendicular to the horizontal support bar 26, a second lower drive rack 45, corresponding to the second upper drive rack 44, points upwards. On the outer side of each horizontal support bar 26, a second transmission gear 46 is rotatably connected between each pair of opposing second upper transmission racks 44 and second lower transmission racks 45, meshing with both. Through the connection between the second upper transmission racks 44 and second lower transmission racks 45 and the second transmission gear 46, the upper stamping shear plate 40 and lower stamping shear plate 41 move towards each other. A second vertical slide groove 47 is provided at each second transmission gear 46 on the top of the frame 25, and each second vertical slide groove 47 is slidably connected to the corresponding second upper transmission rack 44 and second lower transmission rack 45.

[0057] Working principle: The working principle of this radiator fin stamping and forming equipment mainly covers several key stages, including sheet material conveying, mold closing, fin stamping and forming, and cutting.

[0058] During the sheet metal conveying stage, the sheet metal on the stamping platform 27 is first precisely conveyed by the combined action of the roller gears 33 and the conveyor belt 28. The drive motor 32 drives the three transverse conveyor shafts 31 to rotate synchronously, and the power is transmitted through the transmission pulleys and belts 49. The roller gears 33 at both ends of the conveyor shafts 31 have a gradually varying tooth height on their outer circumference. When rotating, they press grooves of increasing depth into the edge of the sheet metal, ensuring that the sheet metal moves in a straight line and preventing slippage. At the same time, the conveyor belt 49 above the horizontal support bar 26 is driven by the conveyor motor 30. The lower side of the conveyor belt 28 contacts the upper surface of the sheet metal, forming a bidirectional conveying force that stably conveys the sheet metal to the stamping station.

[0059] During the mold closing stage, the two first hydraulic telescopic cylinders 34 extend downwards simultaneously, pushing the upper mold 1 vertically downwards. The first upper transmission racks 35 on both sides of the upper mold 1 and the first lower transmission racks 36 on both sides of the lower mold 2 mesh with the first transmission gears 37, converting the linear motion of the hydraulic cylinders into symmetrical opposite motion of the upper and lower molds 2. The first vertical slide groove 38 guides and constrains the transmission racks, ensuring that the upper and lower molds 2 remain parallel during the mold closing process, avoiding mold damage or fin forming defects caused by uneven load. When the upper pressure plate frame 3 and the lower pressure plate frame 8 contact the sheet metal, the upper support spring 7 and the lower support spring 12 are compressed, forming a flexible clamping of the sheet metal to prevent displacement of the sheet metal during the stamping process.

[0060] The fin stamping stage is divided into two steps: shearing and rolling. During shearing, the upper shearing strip 13 engages with the lower limiting groove 14, and the lower shearing strip 15 engages with the upper limiting groove 16. Through opposing shearing actions, end-to-end stamping grooves are formed on the sheet metal, simultaneously stamping the sheet metal into vertically downward-facing fins and vertically upward-facing connecting pieces. In the rolling stage, the upper stamping extension strip 17 drives the upper rolling shaft 19 downwards. After the fins enter the lower support groove 18, the upper rolling shaft 19 progressively rolls and extends the fins. Simultaneously, the lower stamping extension strip 20 drives the lower rolling shaft 22 upwards. After the connecting pieces enter the upper support groove 21, the lower rolling shaft 22 symmetrically rolls and extends the connecting pieces. Multiple sets of stamping extension strips with gradually varying spacing, in conjunction with the support grooves, allow the fins and connecting pieces to gradually reach the designed height through multiple stamping cycles. Subsequently, the bending strip 24 presses downward to bend the connecting piece toward the stamping groove, and the pressing strip 23 presses down again to press the connecting piece into the stamping groove and cover it, thus completing the precision forming of the heat dissipation fins.

[0061] During the cutting and blanking stage, two second hydraulic telescopic cylinders 39 extend downwards simultaneously, pushing the upper stamping shear plate 40 vertically downwards. The second upper drive racks 44 on both sides of the upper stamping shear plate 40 and the second lower drive racks 45 on both sides of the lower stamping shear plate 41 mesh with the second drive gears 46 to ensure that the upper and lower shear plates move in parallel. The upper shearing blade 42 cooperates with the lower support bar 43 to generate shearing force at the connecting piece position, cutting and separating the formed radiator fin assembly from the sheet metal. The second vertical slide 47 guides the drive racks to ensure cutting accuracy. The cut radiator fin assembly is transferred to the finished product area by a subsequent conveying device, completing the entire stamping and forming process.

[0062] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0063] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A radiator fin stamping die, comprising an upper die (1) and a lower die (2) disposed opposite to each other, characterized in that, The upper mold (1) is movably connected to the lower side of the upper pressure plate frame (3), and an upper support spring (7) is connected between the upper mold (1) and the upper pressure plate frame (3). The lower mold (2) is movably connected to the upper side of the lower pressure plate frame (8), and a lower support spring (12) is connected between the lower mold (2) and the lower pressure plate frame (8). The upper mold (1) has an upper shearing strip (13) that can pass through the upper pressure plate frame (3) on one side of its lower end. The lower pressure plate frame (8) has a lower limiting groove (14) that cooperates with the upper shearing strip (13) on one side of its upper end. The lower mold (2) has a lower shearing strip (15) that can pass through the lower pressure plate frame (8) on one side of its upper end. The upper shearing strip (13) and the lower shearing strip (15) are connected end to end in the horizontal plane. The upper pressure plate frame (3) has an upper limiting groove (16) that cooperates with the lower shearing strip (15) on one side. The lower end of the upper die (1) is provided with multiple upper stamping extension strips (17) at equal intervals on one side of the upper shearing strip (13). The lower pressure plate frame (8) is provided with multiple lower support grooves (18) corresponding to the upper stamping extension strips (17). The upper end of the lower die (2) is provided with multiple lower stamping extension strips (20) at equal intervals on one side of the lower shearing strip (15). The upper pressure plate frame (3) is provided with multiple upper support grooves (21) corresponding to the lower stamping extension strips (20). In the direction away from the upper shear bar (13), the distance between the upper stamping extension bar (17) and the lower support groove (18) near the inner wall of the upper shear bar (13) gradually decreases; in the direction away from the lower shear bar (15), the distance between the lower stamping extension bar (20) and the upper support groove (21) near the inner wall of the lower shear bar (15) gradually decreases. The lower end of the upper pressure plate frame (3) is provided with a pressing strip (23) at a position away from the upper shearing strip (13) on the upper stamping extension strip (17).

2. The radiator fin stamping die according to claim 1, characterized in that, Multiple upper sliding holes (4) are provided through the edge of the upper mold (1). Multiple upper sliding shafts (5) corresponding to the upper sliding holes (4) are provided on the edge of the upper pressure plate frame (3). The upper end of each upper sliding shaft (5) extends out of the corresponding upper sliding hole (4) and is provided with an upper limit cap (6). Each upper sliding shaft (5) is fitted with an upper support spring (7) located between the upper mold (1) and the upper pressure plate frame (3).

3. The radiator fin stamping die according to claim 1, characterized in that, Multiple sliding holes (9) are provided through the edge of the lower mold (2). Multiple sliding shafts (10) corresponding to the sliding holes (9) are provided downward on the edge of the lower pressure plate frame (8). The lower end of each sliding shaft (10) extends out of the corresponding sliding hole (9) and is provided with a lower limit cap (11). Each sliding shaft (10) is fitted with a lower support spring (12) located between the lower mold (2) and the lower pressure plate frame (8).

4. The radiator fin stamping die according to claim 1, characterized in that, Each upper stamping extension strip (17) is rotatably connected to an upper roller (19) arranged along its width direction at its lower end near the upper shearing strip (13), and each lower stamping extension strip (20) is rotatably connected to a lower roller (22) arranged along its width direction at its upper end near the lower shearing strip (15).

5. A radiator fin stamping die according to claim 1, characterized in that, At the lower end of the upper pressure plate frame (3), a bending strip (24) is provided downward between the upper stamping extension strip (17) furthest from the upper shearing strip (13) and the pressing strip (23). The lower end of the bending strip (24) is a slanted opening that slopes downward away from the pressing strip (23). The distance between the bending strip (24) and the upper stamping extension strip (17) furthest from the upper shearing strip (13) and the distance between the bending strip (24) and the pressing strip (23) are equal to the distance between two adjacent upper stamping extension strips (17).

6. A heat sink fin stamping forming equipment, based on a heat sink fin stamping die according to any one of claims 1-5, comprising a frame (25), characterized in that, Two horizontal support bars (26) are horizontally arranged in the middle of the frame (25). A stamping platform (27) of equal height and connected to one end of the two horizontal support bars (26) is horizontally arranged at the entrance of the frame (25). Above each horizontal support bar (26), the frame (25) is equipped with multiple belt (49) conveyors distributed along its length. Each belt (49) conveyor includes a conveyor belt (28) arranged along the length of the horizontal support bar (26), two drive shafts (29) respectively arranged at both ends of the conveyor belt (28) and rotatably connected to the edge of the frame (25), and a conveyor motor (30) installed on the outside of the frame (25) for driving the drive shafts (29) to rotate. The upper mold (1) and the lower mold (2) are located on the upper and lower sides of the middle of the two horizontal support bars (26), respectively. The top of the frame (25) is equipped with multiple first hydraulic telescopic cylinders (34) above the middle of the two horizontal support bars (26). The telescopic shaft of each first hydraulic telescopic cylinder (34) is connected downward to the upper end of the upper mold (1). The upper mold (1) is provided with multiple first upper transmission racks (35) on both sides perpendicular to the horizontal support bars (26). The lower mold (2) is provided with multiple first lower transmission racks (36) on both sides perpendicular to the horizontal support bars (26) and corresponding to the first upper transmission racks (35). On the outer side of each horizontal support bar (26), a first transmission gear (37) is rotatably connected between each pair of opposite first upper transmission racks (35) and first lower transmission racks (36). Multiple second hydraulic telescopic cylinders (39) are mounted downwards on the top of the frame (25) on the side of the horizontal support bar (26) away from the stamping platform (27). The lower ends of the telescopic shafts of the multiple second hydraulic telescopic cylinders (39) are connected to a horizontally arranged upper stamping shear plate (40). A lower stamping shear plate (41) is arranged below the upper stamping shear plate (40) inside the frame (25) to cooperate with it. The upper stamping shear plate (40) has an upper shearing blade (42) arranged downwards, and the lower stamping shear plate (41) has an upper shearing blade (42) arranged upwards to cooperate with the upper shearing blade (42). 2) The lower support bar (43) is matched with the upper stamping shear plate (40) and the two sides of the horizontal support bar (26) are provided with a second upper transmission rack (44) downward. The two sides of the lower stamping shear plate (41) are provided with a second lower transmission rack (45) corresponding to the second upper transmission rack (44) upward. On the outer side of each horizontal support bar (26), a second transmission gear (46) is rotatably connected between each pair of opposite second upper transmission racks (44) and second lower transmission racks (45).

7. The radiator fin stamping and forming equipment according to claim 6, characterized in that, The frame (25) is rotatably connected above the stamping platform (27) to multiple horizontally arranged conveyor shafts (31). A drive motor (32) is installed outside the frame (25). The power output shaft of the drive motor (32) is connected to one of the conveyor shafts (31). One end of each conveyor shaft (31) extends out of the frame (25) and is provided with a transmission pulley. All the transmission pulleys are connected in pairs through a belt (49). Each conveyor shaft (31) is provided with a roller gear (33) at both ends of the stamping platform (27). Each roller gear (33) is positioned opposite to the conveyor belt (28) on the corresponding side. The tooth height of the roller gear (33) gradually increases towards the horizontal support bar (26).

8. The radiator fin stamping and forming equipment according to claim 7, characterized in that, Each conveyor belt (28) is provided with a conveyor rack on its outer periphery that cooperates with the hobbing teeth on the outer periphery of the roller gear (33).

9. A radiator fin stamping and forming equipment according to claim 6, characterized in that, The top of the frame (25) is provided with a first vertical groove (38) at each first transmission gear (37), and each first vertical groove (38) is slidably connected to the corresponding first upper transmission rack (35) and the corresponding first lower transmission rack (36). The top of the frame (25) is provided with a second vertical groove (47) at each second transmission gear (46), and each second vertical groove (47) is slidably connected to the corresponding second upper transmission rack (44) and the corresponding second lower transmission rack (45).

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