Aluminum material heat dissipation fin sawing clamp and sawing method

Abstract

The present application relates to the technical field of radiator processing, and particularly relates to an aluminum radiator fin sawing clamp and a sawing method. The aluminum radiator fin sawing clamp and the sawing method of the present application are provided with multiple support frames, and elastic membranes are arranged on both sides of the support frames to form air chambers. The air chambers are inflated by an inflation and deflation mechanism, so that the elastic membranes expand and uniformly adhere to the fin surfaces of the radiator profiles, thereby achieving flexible clamping and effectively avoiding fin damage. A clamping cylinder drives the top pressing block to move, so that the support frame and the fixed plate cooperate to clamp the profile. In addition, the clamp also has a chip blowing and brushing function, which can clean the aluminum chips on the profile surface and the clamp before clamping or after loosening, keep the clamping surface clean, and improve the clamping precision and sawing quality. The aluminum radiator fin sawing method of the present application is simple to operate and effectively ensures the sawing quality.

Description

Technical Field

[0001] This invention relates to the field of radiator processing technology, and in particular to a sawing fixture and sawing method for aluminum heat sinks. Background Technology

[0002] Radiators are crucial structures in industrial thermal systems, their main component being the fins. These fins come into contact with air or fluid to achieve heat exchange. Due to aluminum's high thermal conductivity and low cost, most existing radiators are made of aluminum. The main processing methods for aluminum radiators include extrusion molding, blanking and bending, machining, die casting, and stamping / stacking. Extrusion molding and die casting are relatively simple processes, but their processing precision is low, limiting their use to low-end radiators. High-end radiators primarily utilize blanking and bending, machining, and stamping / stacking. Blanking and bending offers continuous processing, suitable for assembly line production, but requires sophisticated equipment and has relatively high efficiency. Machining involves cutting from a single block of aluminum, resulting in high precision but also high cost. Stamping / stacking involves stamping individual fins from aluminum strips, which are then fixed to the base by welding, riveting, or threading.

[0003] Besides stamping and stacking, the aforementioned high-end radiators, including those formed by shoveling, bending, and cutting, all require secondary processing, especially for the length and height of all fins, to meet high precision requirements. Aluminum radiators require clamping for fixation during secondary processing. For example, patent CN216576758U discloses a sawing device for radiator processing. Through the cooperation of a placement table, sawing blade, drive motor, sawing plate, first shaft, and connecting rod, it can quickly place and saw the radiator. The positioning plate, second shaft, and pressure plate automatically clamp and fix the radiator as the sawing blade moves downwards. This patent simply fixes the radiator and its fins using the positioning plate and pressure plate. However, because the heights of the fins vary on their outer sides, secondary processing is required. Therefore, when the pressure plate presses down on the fins, some fins will inevitably not be fully compressed. Meanwhile, the fins are thin-sheet structures with a certain degree of deflection at one end. When subjected to the sawing force of the saw blade, the fins are prone to deformation. Furthermore, when the deformed fins are subjected to the periodic cutting of the saw blade teeth, they will repeatedly vibrate, causing burrs or gaps to appear on the cut, which in turn affects the quality of the sawing. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an aluminum heat sink sawing fixture, comprising: The base has vertical plates and fixed plates arranged in parallel on it; A clamping cylinder is mounted on the vertical plate; A top pressure block is installed on the telescopic end of the clamping cylinder. Several parallel support frames are provided on the side of the top pressure block near the fixed plate. Each support frame has a channel inside. A connecting pipe connecting all the channels is provided on the top pressure block. An elastic membrane is provided on both sides of each support frame. The periphery of the elastic membrane is sealed to the periphery of the support frame and forms an inflation cavity. The inflation cavity is connected to the channel. The inflation / deflation mechanism has its inlet and outlet ends connected to the connecting pipe. The clamping cylinder can drive the top pressure block to clamp the radiator with the fixing plate, and the support frame can be inserted into the gap between two adjacent fins, and the elastic membrane on it can be inflated and deformed to press against the side of the corresponding fin.

[0005] In some possible embodiments, the support frame is provided with fastening slots on both sides, and each fastening slot is fitted with a pressure frame, which can fasten and press the periphery of the elastic membrane into the fastening slot.

[0006] In some possible embodiments, the two pressure frames on the same support frame are connected by a snap-fit ​​structure.

[0007] In some possible embodiments, each of the support frames has an insertion hole on its outer end face, and a pressure bracket is movably inserted into the insertion hole. One end of the insertion hole can be controlled by a valve to selectively communicate with the channel or the inflation / deflation mechanism. A portion of the pressure bracket located within the insertion hole forms a piston head, and the piston head is sealed to the inner wall of the insertion hole.

[0008] In some possible embodiments, the pressing frame includes a pressing block and at least two guide rods disposed on the same side of the pressing block. The number of insertion holes matches the number of guide rods. All the guide rods are movably inserted into the corresponding insertion holes. The piston head is disposed in the area of ​​all the guide rods located in the insertion holes. An elastic block is disposed on the side of the pressing block away from the top pressing block.

[0009] In some possible embodiments, each of the support frames is provided with a vent groove on its outer end face, the vent groove being connected to the output end of the channel or the inflation / deflation mechanism, and each of the support frames is provided with a detachable sealing plate on its outer end face, the sealing plate sealing the vent groove and forming a venting channel, the sealing plate being provided with a through hole adapted to the insertion hole and a plurality of second chip blowing holes communicating with the venting channel, each of the second chip blowing holes being provided with a second pressure relief valve, and one end of the pressure-resistant frame being movably passed through the through hole and placed in the insertion hole.

[0010] In some possible embodiments, both sides of the support frame are provided with a plurality of first chip-blowing holes that communicate with the channel or the inflation / deflation mechanism, and each of the first chip-blowing holes is provided with a first pressure relief valve.

[0011] In some possible embodiments, a combing mechanism is also included, which includes a telescopic member, a comb block, and a plurality of comb teeth disposed on one side of the comb block. The telescopic member is mounted on the top pressure block, and the comb block is fixedly connected to the telescopic end of the telescopic member. The comb teeth are movably inserted into the gap between any two adjacent support frames. Each comb tooth is provided with a flexible scraper on both sides along the telescopic direction of the telescopic member, and the outer side of each flexible scraper can abut against the side of the support frame and the outer side of the elastic membrane.

[0012] In some possible embodiments, the base is provided with chip removal holes in the area between the upright plate and the fixed plate.

[0013] This invention also provides a method for sawing aluminum heat sinks, which includes the following steps: S100, drive the clamping cylinder to extend and drive the support frame to insert into the gap between the fins of the radiator until the outer end face of the fin abuts against the top pressure block, or the insertion depth of the support frame exceeds 2 / 3 of the height of the fin; wherein, the top of the fin must protrude from the top of the support frame and retain a safe distance to meet the requirements of sawing. S200: Control the inflation and deflation mechanism to inflate the inflation chamber, so that the elastic membranes on both sides of each support frame change shape to press against the corresponding side of the fin, until the pressure value in the inflation chamber reaches the preset value. At this time, the pressure value in the inflation chamber is less than the pressure relief value of the second pressure relief valve. S300. Open the switch between the insertion hole and the charging / discharging mechanism, so that the charging / discharging mechanism charges air into the insertion hole to control the pressure bracket to extend outward until the elastic block presses against the root area of ​​the heat sink fins. At this time, the first pressure relief valve does not release pressure. S400, fine-tune the position of the radiator on the mounting plate and its position relative to the support frame until the fins on the radiator are in the appropriate position; control the inflation / deflation mechanism to continue inflating the inflation chamber and the insertion hole until both the second pressure relief valve and the first pressure relief valve begin to depressurize. S500: Start the external processing equipment to begin sawing the upper part of the fin to be processed until the sawing is completed; S600, the control inflation and deflation mechanism sequentially draws air into the insertion hole and inflation chamber, causing the pressure frame and elastic membrane to retract and reset sequentially to loosen the fins; after the radiator is removed, when the telescopic device is activated to drive the comb block to reciprocate, the comb teeth on the comb block reciprocate in the gap between two adjacent support frames, and the comb teeth scrape the side of the support frame and the surface of the elastic membrane to remove the adhered aluminum shavings. S700. After cleaning up the aluminum shavings, turn the clamping direction of the heat sink so that the edge of the fins to be processed faces the sawing direction. Repeat the above steps until all three edges of the fins on the heat sink are sawed.

[0014] Compared to existing technologies, the advantages of this invention are as follows: The aluminum heat sink sawing fixture of this invention uses multiple support frames, with elastic membranes on both sides of the support frames forming air chambers. An inflation / deflation mechanism inflates these chambers, causing the elastic membranes to expand and evenly adhere to the fin surface of the heat sink profile, achieving flexible clamping and effectively preventing fin damage. A clamping cylinder drives the top pressure block to move, causing the support frames to engage with the fixing plate to clamp the profile. Furthermore, this fixture also features a chip blowing and brushing function, cleaning aluminum chips from the profile surface and the fixture before or after clamping, keeping the clamping surface clean, and improving clamping accuracy and sawing quality. The aluminum heat sink sawing method of this invention is simple to operate and effectively ensures sawing quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the aluminum heat sink sawing fixture provided in an embodiment of the present invention; Figure 2 This is a top view of the aluminum heat sink sawing fixture provided in an embodiment of the present invention; Figure 3 This is a partial structural diagram of the aluminum heat sink sawing fixture provided in an embodiment of the present invention; Figure 4 An exploded view of the aluminum heat sink sawing fixture structure provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the aluminum heat sink sawing fixture provided in an embodiment of the present invention.

[0017] Reference numerals: base 10, upright plate 11, fixing plate 12, chip removal hole 13, clamping cylinder 20, top pressure block 30, support frame 31, channel 32, connecting pipe 33, elastic membrane 34, inflation chamber 35, buckle groove 36, pressure frame 37, insertion hole 38, ventilation groove 39, sealing plate 3a, first chip blowing hole 3b, second chip blowing hole 3c, inflation / deflation mechanism 40, pressure frame 50, piston head 51, pressure block 52, guide rod 53, elastic block 54, combing mechanism 60, telescopic device 61, comb block 62, comb teeth 63, flexible scraper 64. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] See Figures 1 to 5 A sawing fixture for aluminum heat sinks includes a base 10, a clamping cylinder 20, a top pressure block 30, and a gas charging / discharging mechanism 40. A vertical plate 11 and a fixed plate 12 are arranged parallel to each other on the base 10. The clamping cylinder 20 is mounted on the vertical plate 11, and the top pressure block 30 is mounted on the telescopic end of the clamping cylinder 20. Several parallel support frames 31 are arranged on the side of the top pressure block 30 near the fixed plate 12. Each support frame 31 has a channel 32 inside, and the top pressure block 30 has a connection that connects all the channels 32. The tube 33 has an elastic membrane 34 on both sides of each support frame 31. The periphery of the elastic membrane 34 is sealed to the periphery of the support frame 31 to form an inflation chamber 35. The inflation chamber 35 is connected to the channel 32. The inflation and deflation mechanism 40 has its inlet and outlet ends connected to the connecting tube 33. The clamping cylinder 20 can drive the top pressure block 30 to cooperate with the fixing plate 12 to clamp the radiator. The support frame 31 can be inserted into the gap between two adjacent fins and the elastic membrane 34 on it can be inflated and deformed to press against the side of the corresponding fin.

[0020] Specifically, the base 10 is a rigid structure that can be bolted to a workbench or sawing equipment. To ensure the smooth operation of the top pressure block 30, prevent force shifting when clamping the radiator, and prevent deformation of the extension end of the clamping cylinder 20, a slide rail is provided on the base 10. The top pressure block 30 is slidably mounted on the slide rail, thereby ensuring that the top pressure block 30 can reliably clamp the radiator in conjunction with the fixing plate 12. The fixing plate 12 is L-shaped or flat, and its inner side can be provided with rubber pads or other flexible materials for use in conjunction with the support frame 31 to clamp the aluminum profile. The cylinder 20 extends and retracts, causing the top pressure block 30 and the support frame 31 to move toward the fixed plate 12, thereby clamping or releasing. The support frame 31 is a rectangular or trapezoidal frame structure made of metal or high-strength plastic, with a hollow interior to form a channel 32. The elastic membrane 34 is made of elastic materials such as rubber or silicone, and has good extensibility and sealing properties. The inflation / deflation mechanism 40 can be an inflation / deflation system composed of components such as an air pump, pipeline, and solenoid valve, used to inflate or deflate the inflation chamber 35. This system is a conventional air circuit control system, which will not be described in detail in this invention.

[0021] This clamp expands the elastic membrane 34 by inflating the air chamber 35, which can evenly fit the side of the aluminum heat sink fins, achieving flexible surface contact clamping and avoiding excessive local stress on the fins during sawing, which could lead to deformation. The clamping cylinder 20 provides the main clamping force, and the inflation pressure is adjustable to adapt to profiles with different stiffness and thickness.

[0022] See Figures 2 to 5 To facilitate the installation of the elastic membrane 34 and ensure a sealing effect, both sides of the support frame 31 are provided with buckle grooves 36, and each buckle groove 36 is fitted with a pressure frame 37. The pressure frame 37 can fasten and press the periphery of the elastic membrane 34 into the buckle groove 36. The buckle groove 36 is an annular groove, and the pressure frame 37 is a matching annular frame. They are fixed by screws or buckles to ensure that the periphery of the elastic membrane 34 is evenly pressed to form a reliable seal.

[0023] Furthermore, the two pressure frames 37 on the same support frame 31 are connected by a fastening structure, which can be a hook or a buckle, so that the two pressure frames 37 are fastened and fixed to each other, improving the compression and sealing of the elastic membrane 34, and facilitating the disassembly and replacement of the elastic membrane 34.

[0024] See Figure 3 and Figure 4To enhance the support capacity of the support frame 31 and prevent the saw blade from deforming and wobbling together due to the inherent deflection of both the blade and the fins during sawing, thus affecting the sawing quality, each support frame 31 has an insertion hole 38 on its outer end face. A pressure bracket 50 is movably inserted into the insertion hole 38. One end of the insertion hole 38 can be controlled by a valve to selectively connect to the channel 32 or the air inflation / deflation mechanism 40. When the insertion hole 38 is connected to the air inflation / deflation mechanism 40 alone, it can form an independent air path to facilitate control and adaptation to different pressures. To meet force requirements, a portion of the pressure bracket 50 located within the insertion hole 38 forms a piston head 51. The piston head 51 is sealed to the inner wall of the insertion hole 38. When inflated, the gas pressure can push the piston head 51 and the pressure bracket 50 outwards, allowing the pressure bracket 50 to further press against the root area of ​​the radiator fins. This is suitable for applications requiring end positioning, thereby improving the clamping stability of the fixture. The opening and closing of the insertion hole 38 and the channel 32 or the inflation / deflation mechanism 40 can be controlled by a valve, thereby enabling independent control of the pressure bracket 50's movement.

[0025] Furthermore, the pressing frame 50 includes a pressing block 52 and at least two guide rods 53 disposed on the same side of the pressing block 52. The number of insertion holes 38 matches the number of guide rods 53. All guide rods 53 are movably inserted into their corresponding insertion holes 38. A piston head 51 is provided in the area of ​​all guide rods 53 located in the insertion holes 38. An elastic block 54 is provided on the side of the pressing block 52 away from the top pressing block 30. The guide rods 53 are cylindrical. The piston head 51 can be a sealing ring or a sliding head fixed on the guide rod 53. The elastic block 54 is made of rubber or polyurethane to avoid scratching the surface of the profile. The multi-guide rod design ensures that the pressing block 52 moves smoothly and is not easily deviated.

[0026] To achieve sealing of the insertion hole 38 and timely cleaning of debris, each support frame 31 has a vent groove 39 on its outer end face. The vent groove 39 is connected to the channel 32 or the output end of the inflation / deflation mechanism 40. Each support frame 31 has a removable sealing plate 3a on its outer end face. The sealing plate 3a seals the vent groove 39 and forms a venting channel. The sealing plate 3a has a through hole adapted to the insertion hole 38 and several second debris blowing holes 3c connected to the venting channel. Each second debris blowing hole 3c has a second pressure relief valve. One end of the pressure bracket 50 moves through the through hole and is placed in the insertion hole. Inside 38, the ventilation groove 39 is an annular groove opened on the outer end face of the support frame 31. The sealing plate 3a is fixed by screws. The outlet of the second chip blowing hole 3c faces the end face or side of the profile. When the air pressure in the ventilation channel exceeds the set value, the second pressure relief valve opens and the gas is ejected to blow away the aluminum chips at the end of the profile. The second pressure relief valve can be a spring valve, diaphragm valve, etc. In addition, the second chip blowing hole 3c can guide the airflow and drive the airflow to cool the sawing tool, which has a dual effect. In this invention, the ventilation groove 39 is preferably connected separately to the output end of the air filling and defilling mechanism 40 to facilitate the control of the air blowing of the second chip blowing hole 3c.

[0027] See Figure 3 and Figure 4 Both sides of the support frame 31 are provided with a plurality of first slag-blowing holes 3b communicating with the channel 32 or the inflation / deflation mechanism 40. Each first slag-blowing hole 3b is provided with a first pressure relief valve. The outlet of the first slag-blowing hole 3b faces the side of the support frame 31 or the surface of the elastic membrane 34, and is used to blow away aluminum slag attached to the elastic membrane 34. In this invention, the first slag-blowing holes 3b are preferably connected to the channel 32, so that when the pressure bracket 50 extends outward and abuts against the root of the heat sink fins and cannot extend further outward, the pressure in the channel 32 is released. The pressure will continue to rise. At this point, in order to protect the entire air circuit, the pressure can be released through the first pressure relief valve, which improves the safety of the entire air circuit. In addition, the first pressure relief valve also opens when the pressure exceeds the threshold to achieve automatic chip blowing. It should be added that some of the openings of the first chip blowing hole 3b can be tilted upward, or the first pressure relief valve can have two outlets that are tilted upward and downward at the same time. When the external sawing tool is sawing the fins on the heat sink, the first chip blowing hole 3b can also cool the blade while blowing chips, which has a dual effect.

[0028] See Figures 2 to 3The base 10 is also equipped with a combing mechanism 60, which includes a telescopic device 61, a comb block 62, and several comb teeth 63 disposed on one side of the comb block 62. The telescopic device 61 is mounted on the top pressure block 30, and the comb block 62 is fixedly connected to the telescopic end of the telescopic device 61. The comb block 62 is slidably mounted on the upper surface of the support frame 31. Comb teeth 63 are movably inserted into the gap between any two adjacent support frames 31. Each comb tooth 63 is provided with a flexible scraper 64 on both sides along the telescopic direction of the telescopic device 61. The outer side of each flexible scraper 64 can abut against the side of the support frame 31 and the outer side of the elastic membrane 34. The telescopic device 61 can be a cylinder or an electric push rod. The comb teeth 63 are flat strips, and the flexible scrapers 64 on both sides are rubber sheets or brushes. When the telescopic device 61 drives the comb block 62 to reciprocate, the comb teeth 63 move in the gap of the support frame 31, and the flexible scrapers 64 scrape the side of the support frame 31 and the surface of the elastic membrane 34 to remove the adhering aluminum shavings.

[0029] See you again Figure 2 The base 10 is provided with a chip discharge hole 13 in the area between the upright plate 11 and the fixed plate 12. A chip collection box or a chip suction device can be connected below the chip discharge hole 13 to collect the falling aluminum chips and keep the working area clean.

[0030] This invention also provides a method for sawing aluminum heat sinks, comprising the following steps: S100, drive the clamping cylinder 20 to extend and drive the support frame 31 to be inserted into the gap between the fins of the radiator until the outer end face of the fins abuts against the top pressure block 30, or the insertion depth of the support frame 31 exceeds 2 / 3 of the height of the fins. S200, control the inflation / deflation mechanism 40 to inflate the inflation chamber 35, so that the elastic membranes 34 on both sides of each support frame 31 change shape to press against the corresponding side of the fin, until the pressure value in the inflation chamber 35 reaches the preset value. At this time, the pressure value in the inflation chamber 35 is less than the pressure relief value of the second pressure relief valve. S300, Open the switch between the insertion hole 38 and the charging / discharging mechanism 40, so that the charging / discharging mechanism 40 charges air into the insertion hole 38 to control the pressure bracket 50 to extend outward until the elastic block 54 presses against the root area of ​​the heat sink fins. At this time, the first pressure relief valve does not release pressure. S400, fine-tune the position of the radiator on the fixed plate 12 and its position relative to the support frame 31 until the fins on the radiator are in the appropriate position; control the inflation / deflation mechanism 40 to continue to inflate the inflation chamber 35 and the insertion hole 38 until both the second pressure relief valve and the first pressure relief valve begin to depressurize. S500: Start the external processing equipment to begin sawing the upper part of the fin to be processed until the sawing is completed; S600, the control inflation and deflation mechanism 40 sequentially draws air into the insertion hole 38 and the inflation chamber 35, causing the pressure frame 50 and the elastic membrane 34 to retract and reset sequentially to loosen the fins; after the radiator is removed, when the telescopic device 61 is activated to drive the comb block 62 to reciprocate, the comb teeth 63 on the comb block 62 reciprocate in the gap between two adjacent support frames 31, and the comb teeth 63 scrape the side of the support frame 31 and the surface of the elastic membrane 34 to remove the adhered aluminum shavings. S700. After cleaning up the aluminum shavings, turn the clamping direction of the heat sink so that the edge of the fins to be processed faces the sawing direction. Repeat the above steps until all three edges of the fins on the heat sink are sawed.

[0031] In step S100 above, the back of the heat sink is fixed to the fixing plate 12. The fixing plate 12 is provided with a positioning structure or a snap-fit ​​structure to prevent the heat sink from sliding relative to the fixing plate 12. It should be noted that the way the support frame 31 is inserted between the fins of the heat sink can be processed at both ends of the fins, that is, at both ends in the length direction. As for the two ends in the height direction of the fins, the insertion direction of the support frame 31 is the same as the length direction of the fins. At this time, the top pressing block 30 and the fixing plate 12 respectively clamp the two ends of the heat sink fins in the length direction. In some embodiments, if the length of the support frame 31 exceeds the length of the fins, a support frame 31 of different lengths can be replaced to adapt. Similarly, the gaps between adjacent fins at different distances can be adapted by the deformation of the elastic membrane 34. In step S100, the top of the fins needs to protrude from the top of the support frame 31 and retain a safe distance to meet the requirements of sawing. This sawing space is designed according to the actual cutting situation to reduce damage to the support frame 31.

[0032] In step S300 above, if the elastic block 54 still fails to press against the root area of ​​the heat sink fins after the pressure bracket 50 extends outward to its limit stroke, in addition to replacing it with a longer support frame 31 for adaptation, it can also be processed directly. Although the support structure formed by the entire support frame 31 and the pressure bracket 50 cannot completely cover the side of the entire fin, the support structure formed by the support frame 31 and the pressure bracket 50 has exceeded two-thirds of the length of the surface to be processed on the fin. Therefore, it can effectively reduce the swing amplitude of the entire fin to the outward side and ensure the quality of processing.

[0033] In step S400 above, the position of the heat sink on the fixed plate 12 and its position relative to the support frame 31 can be finely adjusted by using a tool to adjust the position of the heat sink base, or by using the air release mechanism 40 to release air into the air chamber 35 and the insertion hole 38 to loosen the fins, thereby adjusting the position of the heat sink.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sawing fixture for aluminum heat sinks, characterized in that, include: A base (10) on which upright plates (11) and fixed plates (12) are arranged in parallel. A clamping cylinder (20) is mounted on the vertical plate (11); A top pressure block (30) is installed on the telescopic end of the clamping cylinder (20). The top pressure block (30) has several parallel support frames (31) arranged on one side near the fixed plate (12). Each support frame (31) has a channel (32) inside. The top pressure block (30) has a connecting pipe (33) connecting all the channels (32). Each support frame (31) has an elastic membrane (34) on both sides. The periphery of the elastic membrane (34) is sealed to the periphery of the support frame (31) and forms an inflation chamber (35). The inflation chamber (35) is connected to the channel (32). The inflation / deflation mechanism (40) has its inlet and outlet ends connected to the connecting pipe (33); The clamping cylinder (20) can drive the top pressure block (30) to cooperate with the fixing plate (12) to clamp the radiator. The support frame (31) can be inserted into the gap between two adjacent fins and the elastic membrane (34) on it can be inflated and deformed to press against the side of the corresponding fin. Each of the support frames (31) has an insertion hole (38) on its outer end face. A pressure bracket (50) is movably inserted into the insertion hole (38). One end of the insertion hole (38) can be controlled by a valve to selectively communicate with the channel (32) or the inflation / deflation mechanism (40). The pressure bracket (50) forms a piston head (51) in a portion of the area inside the insertion hole (38). The piston head (51) is sealed to the inner wall of the insertion hole (38). The pressing frame (50) includes a pressing block (52) and at least two guide rods (53) arranged on the same side of the pressing block (52). The number of insertion holes (38) matches the number of guide rods (53). All the guide rods (53) are movably inserted into the corresponding insertion holes (38). The piston head (51) is provided in the area of ​​all the guide rods (53) located in the insertion holes (38). An elastic block (54) is provided on the side of the pressing block (52) away from the top pressing block (30).

2. The aluminum heat sink sawing fixture according to claim 1, characterized in that, Both sides of the support frame (31) are provided with buckle grooves (36), and each buckle groove (36) is fitted with a pressure frame (37). The pressure frame (37) can fasten and press the periphery of the elastic membrane (34) into the buckle groove (36).

3. The aluminum heat sink sawing fixture according to claim 2, characterized in that, The two pressure frames (37) on the same support frame (31) are connected by a snap-fit ​​structure.

4. The aluminum heat sink sawing fixture according to claim 1, characterized in that, Each of the support frames (31) has a ventilation groove (39) on its outer end face. The ventilation groove (39) is connected to the output end of the channel (32) or the inflation / deflation mechanism (40). Each of the support frames (31) has a detachable sealing plate (3a) on its outer end face. The sealing plate (3a) seals the ventilation groove (39) and forms a ventilation channel. The sealing plate (3a) has a through hole adapted to the insertion hole (38) and several second chip blowing holes (3c) connected to the ventilation channel. Each second chip blowing hole (3c) has a second pressure relief valve. One end of the pressure support frame (50) moves through the through hole and is placed in the insertion hole (38).

5. The aluminum heat sink sawing fixture according to claim 1, characterized in that, Both sides of the support frame (31) are provided with a plurality of first chip blowing holes (3b) that communicate with the channel (32) or the inflation / deflation mechanism (40), and each of the first chip blowing holes (3b) is provided with a first pressure relief valve.

6. The aluminum heat sink sawing fixture according to claim 1, characterized in that, It also includes a combing mechanism (60), which includes a telescopic device (61), a comb block (62), and a plurality of comb teeth (63) disposed on one side of the comb block (62). The telescopic device (61) is mounted on the top pressure block (30). The comb block (62) is fixedly connected to the telescopic end of the telescopic device (61). The comb teeth (63) are movably inserted into the gap between any two adjacent support frames (31). Each comb tooth (63) is provided with a flexible scraper (64) on both sides along the telescopic direction of the telescopic device (61). The outer side of each flexible scraper (64) can abut against the side of the support frame (31) and the outer side of the elastic membrane (34).

7. The aluminum heat sink sawing fixture according to claim 1, characterized in that, The base (10) is provided with chip removal holes (13) in the area between the upright plate (11) and the fixed plate (12).

8. A method for sawing aluminum heat sinks, wherein the sawing method can be implemented on the aluminum heat sink sawing fixture as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S100, drive the clamping cylinder (20) to extend and drive the support frame (31) to insert into the gap between the fins of the radiator until the outer end face of the fins abuts against the top pressure block (30), or the insertion depth of the support frame (31) exceeds 2 / 3 of the height of the fins; wherein, the top of the fins must protrude from the top of the support frame (31) and retain a safe distance to meet the requirements of sawing. S200, control the inflation / deflation mechanism (40) to inflate the inflation chamber (35) so that the elastic membrane (34) on both sides of each support frame (31) changes shape to press against the corresponding side of the fin until the pressure value in the inflation chamber (35) reaches the preset value. At this time, the pressure value in the inflation chamber (35) is less than the pressure relief value of the second pressure relief valve. S300, Open the switch between the insertion hole (38) and the charging / discharging mechanism (40) so that the charging / discharging mechanism (40) charges the insertion hole (38) to control the pressure bracket (50) to extend outward until the elastic block (54) presses against the root area of ​​the heat sink fins. At this time, the first pressure relief valve does not release pressure. S400, fine-tune the position of the radiator on the fixed plate (12) and its position relative to the support frame (31) until the fins on the radiator are in the appropriate position; control the inflation / deflation mechanism (40) to continue inflation into the inflation chamber (35) and the insertion hole (38) until both the second pressure relief valve and the first pressure relief valve begin to depressurize; S500: Start the external processing equipment to begin sawing the upper part of the fin to be processed until the sawing is completed; S600, the control inflation and deflation mechanism (40) sequentially draws air into the insertion hole (38) and inflation chamber (35), causing the pressure frame (50) and elastic membrane (34) to retract and reset sequentially to loosen the fins; after the radiator is removed, when the telescopic device (61) is activated to drive the comb block (62) to reciprocate, the comb teeth (63) on the comb block (62) reciprocate in the gap between two adjacent support frames (31), and the comb teeth (63) scrape the side of the support frame (31) and the surface of the elastic membrane (34) to remove the adhered aluminum shavings; S700. After cleaning up the aluminum shavings, turn the clamping direction of the heat sink so that the edge of the fins to be processed faces the sawing direction. Repeat the above steps until all three edges of the fins on the heat sink are sawed.

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