Laminated riveting die for laminated riveting machining of cooling fins and using method of laminated riveting die

Abstract

The invention discloses a laminated riveting die for laminated riveting processing of cooling fins and a use method, relates to the technical field of laminated riveting of cooling fins, and solves the problems that when a laminated riveting processing die for cooling fins is used, the processing steps are different and the required dies are different due to different shapes of the processed cooling fins, so that the processing cost is reduced. And therefore, the radiating fins in each shape need to be processed by a set of corresponding dies, and the processing is very inconvenient. The invention discloses a laminated riveting die for laminated riveting machining of cooling fins and a using method. The laminated riveting die comprises a die shell structure, and a stamping die, a riveting slotting die, an idle step die and a discharging die are sequentially arranged on the surface of the top end of the die shell structure from front to back. The limiting frames are clamped into the top ends of the mold mounting grooves correspondingly, so that the stamping mold, the riveting slotting mold, the idle step mold and the discharging mold are blocked and limited by the limiting frames, and the situation that the stamping mold shakes due to the influence of factors such as stamping inertia in the stamping process of the device is avoided.

Description

Technical Field

[0001] The invention relates to the field of heat sink stack riveting, and in particular to a stack riveting die for heat sink stack riveting processing and a use method thereof. Background Art

[0002] A heat sink is a device that dissipates heat from heat-prone electronic components in electrical appliances. It is usually made of aluminum alloy, brass or bronze in the form of plates, sheets, or multiple sheets. For example, a CPU in a computer uses a fairly large heat sink, as do power tubes, line tubes, and amplifier tubes in a TV. Generally, a heat sink should be coated with a layer of thermal conductive silicone grease on the contact surface between the electronic component and the heat sink during use, so that the heat generated by the component can be more effectively transferred to the heat sink, and then dissipated to the surrounding air through the heat sink; during the processing of the heat sink, it is usually necessary to perform riveting so that multiple heat sinks are riveted together to form a component.

[0003] When using the existing heat sink stack riveting processing mold, the different shapes of the processed heat sinks often lead to different processing steps and different molds. As a result, each shape of the heat sink requires a set of corresponding molds for processing, which is very inconvenient; therefore, it does not meet the existing needs. In this regard, we propose a stack riveting mold for heat sink stack riveting processing and a method of use. Summary of the invention

[0004] The purpose of the present invention is to provide a riveting die and a method of use for riveting heat sinks, so as to solve the problem that the heat sink riveting die mentioned in the above background technology often leads to different processing steps and different molds due to the different shapes of the processed heat sinks, resulting in each shape of heat sink requiring a set of corresponding molds for processing, which is very inconvenient.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a stack riveting die for stack riveting of heat sinks, comprising a die shell structure, the top surface of the die shell structure is provided with a stamping die, a riveting slotting die, a stepping die and a blanking die in sequence from front to back, the outer sides of the stamping die, the riveting slotting die, the stepping die and the blanking die are all provided with a limiting mechanism, and the bottom end of the die shell structure is provided with a discharge structure; The limiting mechanism includes a limiting frame, a frame side groove, a fixing rod, a limiting arc plate and a limiting rod. The limiting frames are movably installed on the outer sides of the stamping die, the riveting slotting die, the hollow step die and the blanking die. Frame side grooves are provided on both sides of the limiting frame. Fixing rods are fixedly installed inside the frame side grooves. The outer surfaces of the fixing rods are rotatably installed with limiting arc plates, and the limiting rods are slidably installed on the front and rear side surfaces of the limiting arc plates.

[0006] Preferably, the limiting mechanism also includes a spring groove, a compression spring, a sliding groove, a sliding rod, an extrusion spring and a limiting groove. The front and rear surfaces of the limiting arc plate are provided with spring grooves, one end of the limiting rod is slidably inserted into the interior of the spring groove, and a compression spring is movably installed between the limiting rod and the interior of the spring groove. Two sliding grooves are provided at the top of the mold shell structure near the limiting arc plate, and the interior of the sliding groove is provided with a limiting groove. The other end of the limiting rod is slidably inserted into the interior of the limiting groove, and a sliding rod is slidably installed in the interior of the sliding groove. An extrusion spring is movably installed between the sliding rod and the interior of the sliding groove.

[0007] Preferably, the mold shell structure includes a base, positioning holes, a support plate, a bottom plate, a pallet, a mold mounting groove and a mounting groove, a plurality of support plates are fixedly installed on the bottom end of the base, a bottom plate is fixedly installed on the bottom end of the support plate, a plurality of positioning holes are provided on both sides of the top surface of the base, four mold mounting grooves are provided in sequence on the top surface of the base from front to back, a pallet is fixedly installed at the bottom end of the base near the mold mounting groove, and a plurality of mounting grooves are provided on the top surface of the base.

[0008] Preferably, the mold shell structure also includes a discharge inclined plate, a support plate through groove, a waste outlet and a support plate outer groove. The surface of the support plate is provided with a support plate through groove, and a waste outlet is provided between every two support plates. Two discharge inclined plates are fixedly installed inside the three waste outlets on the rear side, and support plate outer grooves are provided at the positions where the support plates are provided with support plate through grooves.

[0009] Preferably, the discharging structure includes a conveyor belt, a conical material baffle plate, a mounting plate and a rotating shaft. The conveyor belt is movably mounted on the top surface of the base plate. Two rotating shafts are provided inside the conveyor belt. The rotating shafts are rotatably connected to the inner wall of the base plate. Three conical material baffle plates are movably mounted on the top of the conveyor belt. The top of the conical material baffle plates are fixedly mounted with mounting plates.

[0010] Preferably, the limiting arc plates are rotated and inserted into the interior of the installation grooves, and the top surface of the base is provided with sliding grooves at the front and rear positions close to the limiting arc plates.

[0011] Preferably, the conical material baffle plates are all movably inserted into the interior of the through grooves of the support plates, and the mounting plates are all movably inserted into the interior of the outer grooves of the support plates.

[0012] Preferably, the stamping die, riveting slotting die, step-in die and blanking die are all movably snapped into the interior of the die mounting groove, the outer surfaces of the top ends of the stamping die, riveting slotting die, step-in die and blanking die are all provided with snap-in grooves, and the limiting frames are all movably snapped into the interior of the snap-in grooves.

[0013] Preferably, a plurality of material strip baffles are provided on both sides of the top of the base, and the material strip baffles are threadedly connected to the outer surface of the base through bolts. A stamping upper die is provided above the mold shell structure, and a plurality of stamping heads and positioning rods are provided at the bottom end of the stamping upper die, and the positioning rods are movably inserted into the interior of the positioning holes.

[0014] A method for using a stack riveting die for stack riveting of a heat sink, the method comprising the following steps: Step A: The aluminum sheet strip of the heat sink is transported to the rear side of the base through the loading mechanism, and the aluminum sheet strip passes through the bottom end of the strip baffle, and then the aluminum sheet strip is punched by the punch head of the punching upper die, so that it passes through the punching die and the riveting slotting die in turn for punching, and after being buffered by the empty step die, the material is removed at the position of the blanking die for stacking riveting, until multiple heat sink aluminum sheets inside the blanking die are stacked and riveted and fall onto the surface of the conveyor belt to be removed; Step B: When it is necessary to perform stamping and riveting on heat sinks of different shapes, the stamping die, riveting slotting die, stepping die and blanking die can be replaced so that the through holes on the surfaces of the new stamping die, riveting slotting die, stepping die and blanking die are consistent with the heat sinks of corresponding models, so as to facilitate the production of heat sinks of different models by the device; Step C: When replacing the stamping die, riveting slotting die, step-in-place die and blanking die, first press the two sliding rods inwards to make the sliding rods push the limit rods back to the inside of the spring groove. At this time, the limit arc plate can be rotated outwards from the inside of the installation groove to keep the limit arc plate and the limit frame in a vertical state. At this time, the limit frame can be directly pulled outwards from the top of the die installation groove, thereby releasing the limit frame from limiting the stamping die, riveting slotting die, step-in-place die and blanking die, and then the stamping die, riveting slotting die, step-in-place die and blanking die can be replaced; Step D: After the stamping die, riveting slotting die, step-in-place die and blanking die are replaced, the new stamping die, riveting slotting die, step-in-place die and blanking die are installed inside the die installation slot, and the limiting frames are respectively inserted into the top of the die installation slot, so that the stamping die, riveting slotting die, step-in-place die and blanking die are blocked and limited by the limiting frames to prevent the stamping die, riveting slotting die, step-in-place die and blanking die from shaking due to factors such as stamping inertia during the stamping process. Then, the limiting rod is pressed inward to retract the limiting rod to the inside of the spring groove, and the limiting arc plate is rotated in the direction of the installation slot to make the limiting arc plate stuck in the inside of the installation slot. At this time, the limiting rod is ejected by the elastic potential energy of the compression spring, so that the limiting rod is stuck in the inside of the limiting slot, thereby limiting the limiting arc plate to prevent the limiting arc plate from rotating out due to shaking or other factors. Step E: The waste produced during the stamping process will fall along the center of the pallet to the surface of the conveyor belt. At this time, the waste produced by the stamping die and the riveting and slotting die will be transported by the conveyor belt and hit the surface of the conical baffle plate, and the conical surface of the conical baffle plate will move the waste toward the discharge ramp, and the inclined surface of the discharge ramp will be used to discharge the waste from the waste outlet to avoid waste accumulation and affect the processing of the device. After the finished heat sink is riveted inside the blanking die, it falls to the surface of the conveyor belt and is discharged from the device from the support plate slot position below the blanking die through the conveyor belt.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the limiting arc plate and the limiting rod. After the stamping die, the riveting slotting die, the stepping die and the blanking die are replaced, the new stamping die, the riveting slotting die, the stepping die and the blanking die are installed in the inside of the die mounting groove, and the limiting frames are respectively inserted into the top end of the die mounting groove, so that the stamping die, the riveting slotting die, the stepping die and the blanking die are blocked and limited by the limiting frames, so as to avoid the situation that the stamping die, the riveting slotting die, the stepping die and the blanking die shake due to the inertia of stamping and other factors during the stamping process. Subsequently, the limiting rod is pressed inwardly to retract the limiting rod into the inside of the spring groove, and then the limiting arc plate is rotated in the direction of the mounting groove to make the limiting arc plate snap into the inside of the mounting groove. At this time, the limiting rod is ejected by the elastic potential energy of the compression spring, so that the limiting rod is snapped into the inside of the limiting groove, thereby limiting the limiting arc plate, and preventing the limiting arc plate from rotating out by itself due to shaking or other factors.

[0016] 2. In the present invention, through the cooperation of the conical baffle plate and the conveyor belt, the waste produced during the stamping process will fall along the center of the support plate to the surface of the conveyor belt. At this time, the waste produced by the stamping die and the riveting and slotting die will be transported by the conveyor belt and hit the surface of the conical baffle plate, and the conical surface of the conical baffle plate will move the waste toward the discharge ramp, and the inclined surface of the discharge ramp will discharge the waste through the waste outlet to avoid waste accumulation affecting the processing of the device. After the finished heat sink is riveted inside the blanking die, it falls to the surface of the conveyor belt and is discharged from the device from the support plate slot position under the blanking die through the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A cross-sectional top view of the present invention as a whole; Figure 3 A cross-sectional front view of the present invention as a whole; Figure 4 A sectional side view of the present invention as a whole; Figure 5 It is a cross-sectional top view of the position of the conical baffle plate of the present invention; Figure 6 It is a cross-sectional side view of the position of the sliding groove of the present invention; Figure 7 For the present invention Figure 2 Schematic diagram of the local structure of part A; Figure 8 For the present invention Figure 6 Schematic diagram of the local structure of part B.

[0018] In the figure: 1. mold shell structure; 101. base; 102. positioning hole; 103. support plate; 104. bottom plate; 105. discharge inclined plate; 106. support plate through groove; 107. support plate; 108. waste outlet; 109. mold installation groove; 110. support plate outer groove; 111. installation groove; 2. limit mechanism; 201. limit frame; 202. frame side groove; 203. fixing rod; 204 , limiting arc plate; 205, spring groove; 206, limiting rod; 207, compression spring; 208, sliding groove; 209, sliding rod; 210, extrusion spring; 211, limiting groove; 3, material belt baffle; 4, discharge structure; 401, conveyor belt; 402, cone-shaped material baffle plate; 403, mounting plate; 404, rotating shaft; 5, stamping die; 6, riveting slotting die; 7, empty step die; 8, blanking die. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 8 , an embodiment of the present invention provides: a stack riveting die for stack riveting of heat sinks, comprising a die shell structure 1, a stamping die 5, a riveting slotting die 6, a step die 7 and a blanking die 8 are arranged on the top surface of the die shell structure 1 from front to back, a limiting mechanism 2 is arranged on the outer sides of the stamping die 5, the riveting slotting die 6, the step die 7 and the blanking die 8, and a discharge structure 4 is arranged at the bottom end of the die shell structure 1; The limiting mechanism 2 includes a limiting frame 201, a frame side groove 202, a fixing rod 203, a limiting arc plate 204 and a limiting rod 206. The limiting frames 201 are movably installed on the outer sides of the stamping die 5, the riveting slotting die 6, the hollow step die 7 and the blanking die 8. Frame side grooves 202 are provided on both sides of the limiting frame 201. The inside of the frame side grooves 202 is fixedly installed with a fixing rod 203. The outer surface of the fixing rod 203 is rotatably installed with the limiting arc plate 204. The front and rear side surfaces of the limiting arc plate 204 are slidably installed with the limiting rod 206.

[0021] The limiting mechanism 2 also includes a spring groove 205, a compression spring 207, a sliding groove 208, a sliding rod 209, an extrusion spring 210 and a limiting groove 211. The front and rear surfaces of the limiting arc plate 204 are provided with spring grooves 205, one end of the limiting rod 206 is slidably inserted into the interior of the spring groove 205, and a compression spring 207 is movably installed between the limiting rod 206 and the interior of the spring groove 205. Two sliding grooves 208 are provided at the top of the mold shell structure 1 near the limiting arc plate 204, and a limiting groove 211 is provided inside the sliding groove 208. The other end of the limiting rod 206 is slidably inserted into the interior of the limiting groove 211, and a sliding rod 209 is slidably installed inside the sliding groove 208. An extrusion spring 210 is movably installed between the sliding rod 209 and the interior of the sliding groove 208.

[0022] Through the cooperation of the limiting arc plate 204 and the limiting rod 206, when the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are replaced, the new stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are installed into the inside of the die installation groove 109, and the limiting frame 201 is respectively inserted into the top inside of the die installation groove 109, so that the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are blocked and limited by the limiting frame 201, so as to avoid the device from being blocked during the stamping process. The step mold 7 and the blanking mold 8 may shake due to the inertia of stamping and other factors. Then, the limit rod 206 is pressed inward to make the limit rod 206 retract to the inside of the spring groove 205, and then the limit arc plate 204 is rotated in the direction of the installation groove 111 to make the limit arc plate 204 snap into the inside of the installation groove 111. At this time, the limit rod 206 will be ejected by the elastic potential energy of the compression spring 207, so that the limit rod 206 is snapped into the inside of the limit groove 211, thereby limiting the limit arc plate 204 and preventing the limit arc plate 204 from rotating out by itself due to shaking or other factors.

[0023] The mold shell structure 1 includes a base 101, positioning holes 102, a support plate 103, a bottom plate 104, a pallet 107, a mold mounting groove 109 and a mounting groove 111. A plurality of support plates 103 are fixedly installed at the bottom end of the base 101, a bottom plate 104 is fixedly installed at the bottom end of the support plate 103, a plurality of positioning holes 102 are provided on both sides of the top surface of the base 101, four mold mounting grooves 109 are sequentially provided on the top surface of the base 101 from front to back, a pallet 107 is fixedly installed at the bottom end of the base 101 near the mold mounting groove 109, and a plurality of mounting grooves 111 are provided on the top surface of the base 101.

[0024] The mold shell structure 1 also includes a discharge inclined plate 105, a support plate through groove 106, a waste outlet 108 and a support plate outer groove 110. The surface of the support plate 103 is provided with a support plate through groove 106, and a waste outlet 108 is provided between every two support plates 103. Two discharge inclined plates 105 are fixedly installed inside the three waste outlets 108 on the rear side, and support plate outer grooves 110 are provided at the positions where the support plate through grooves 106 are provided on the support plates 103.

[0025] The discharging structure 4 includes a conveyor belt 401, a conical baffle plate 402, a mounting plate 403 and a rotating shaft 404. The conveyor belt 401 is movably mounted on the top surface of the bottom plate 104. Two rotating shafts 404 are arranged inside the conveyor belt 401. The rotating shafts 404 are rotatably connected to the inner wall of the bottom plate 104. Three conical baffle plates 402 are movably mounted on the top of the conveyor belt 401. The mounting plates 403 are fixedly mounted on the top of the conical baffle plates 402.

[0026] Through the cooperation of the conical baffle plate 402 and the conveyor belt 401, the waste produced during the stamping process will fall along the center of the support plate 107 to the surface of the conveyor belt 401. At this time, the waste produced by the stamping die 5 and the riveting and slotting die 6 will be transported by the conveyor belt 401 and hit the surface of the conical baffle plate 402, and the conical surface of the conical baffle plate 402 will move the waste toward the discharge ramp 105, and the waste will be discharged from the device through the waste outlet 108 through the inclined surface of the discharge ramp 105, so as to avoid waste accumulation and affect the processing of the device. After the finished heat sink is riveted inside the blanking die 8, it falls to the surface of the conveyor belt 401 and is discharged from the device from the support plate slot 106 below the blanking die 8 through the conveyor belt 401.

[0027] The limiting arc plates 204 are rotated and inserted into the installation grooves 111 , and sliding grooves 208 are provided at the front and rear positions of the top surface of the base 101 near the limiting arc plates 204 .

[0028] The conical material blocking plates 402 are all movably inserted into the interior of the support plate through grooves 106 , and the mounting plates 403 are all movably inserted into the interior of the support plate outer grooves 110 .

[0029] The stamping die 5, the riveting and slotting die 6, the stepping die 7 and the blanking die 8 are all movably inserted into the interior of the die mounting groove 109. The outer surfaces of the top ends of the stamping die 5, the riveting and slotting die 6, the stepping die 7 and the blanking die 8 are all provided with snap-in grooves, and the limiting frames 201 are all movably inserted into the interior of the snap-in grooves.

[0030] A plurality of material strip baffles 3 are provided on both sides of the top of the base 101, and the material strip baffles 3 are threadedly connected to the outer surface of the base 101 through bolts. A stamping upper die is provided above the mold shell structure 1, and a plurality of stamping heads and positioning rods are provided at the bottom end of the stamping upper die, and the positioning rods are movably inserted into the interior of the positioning holes 102.

[0031] A method for using a stack riveting die for stack riveting of a heat sink, the method comprising the following steps: Step A: The aluminum sheet material strip of the heat sink is transported to the rear side of the base 101 through the loading mechanism, and the aluminum sheet material strip passes through the bottom end of the material strip baffle 3, and then the aluminum sheet material strip is punched by the punch head of the punching upper die, so that it passes through the punching die 5 and the riveting slotting die 6 in turn, and after being buffered by the idle step die 7, the material is removed at the position of the blanking die 8 for stacking and riveting, until multiple heat sink aluminum sheets inside the blanking die 8 are stacked and riveted and fall onto the surface of the conveyor belt 401 to be removed; Step B: When it is necessary to perform stamping and riveting on heat sinks of different shapes, the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 can be replaced, so that the through holes on the surfaces of the new stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are consistent with the heat sinks of the corresponding models, so as to facilitate the device to produce heat sinks of different models; Step C: When replacing the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8, first press the two sliding rods 209 inwards, so that the sliding rods 209 push the limiting rods 206 to retract into the spring groove 205, and then the limiting arc plate 204 can be rotated outwards from the inside of the mounting groove 111, so that the limiting arc plate 204 and the limiting frame 201 are kept in a vertical state, and then the limiting frame 201 can be directly pulled outwards from the top of the die mounting groove 109, so as to release the limiting of the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 by the limit frame 201, and then the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 can be replaced; Step D: After the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are replaced, the new stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are installed in the die installation slot 109, and the limiting frame 201 is respectively inserted into the top of the die installation slot 109, so that the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 are blocked and limited by the limiting frame 201 to prevent the stamping die 5, the riveting slotting die 6, the stepping die 7 and the blanking die 8 from being blocked and limited by the limiting frame 201 during the stamping process. The tool 8 may shake due to the inertia of stamping and other factors, and then the limiting rod 206 is pressed inward to make the limiting rod 206 retract to the inside of the spring groove 205, and then the limiting arc plate 204 is rotated in the direction of the installation groove 111, so that the limiting arc plate 204 is stuck in the inside of the installation groove 111. At this time, the limiting rod 206 is ejected by the elastic potential energy of the compression spring 207, so that the limiting rod 206 is stuck in the inside of the limiting groove 211, thereby limiting the limiting arc plate 204, and preventing the limiting arc plate 204 from rotating out by itself due to shaking or other factors; Step E: The waste produced during the stamping process will fall along the center of the support plate 107 to the surface of the conveyor belt 401. At this time, the waste produced by the stamping die 5 and the riveting and slotting die 6 will be transported by the conveyor belt 401 and hit the surface of the conical baffle plate 402, and the conical surface of the conical baffle plate 402 will move the waste toward the discharge ramp 105, and the waste will be discharged from the device through the waste outlet 108 through the inclined surface of the discharge ramp 105, so as to avoid waste accumulation and affect the processing of the device. After the finished heat sink is riveted inside the blanking die 8, it falls to the surface of the conveyor belt 401 and is discharged from the device from the support plate slot 106 below the blanking die 8 through the conveyor belt 401.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A stack riveting die for heat sink stack riveting processing, comprising a die housing structure (1), characterized in that: The top surface of the mold shell structure (1) is provided with a punching mold (5), a riveting and slotting mold (6), a stepping mold (7) and a blanking mold (8) in sequence from front to back, and the outer sides of the punching mold (5), the riveting and slotting mold (6), the stepping mold (7) and the blanking mold (8) are all provided with a limiting mechanism (2), and the bottom end of the mold shell structure (1) is provided with a discharge structure (4); The limiting mechanism (2) comprises a limiting frame (201), a frame side groove (202), a fixing rod (203), a limiting arc plate (204) and a limiting rod (206); the limiting frame (201) is movably mounted at the outer side of the stamping die (5), the riveting slotting die (6), the hollow step die (7) and the blanking die (8); frame side grooves (202) are provided on both sides of the limiting frame (201); fixing rods (203) are fixedly mounted inside the frame side grooves (202); limiting arc plates (204) are rotatably mounted on the outer surfaces of the fixing rods (203); and limiting rods (206) are slidably mounted on the front and rear side surfaces of the limiting arc plate (204).

2. The stack riveting die for stack riveting of heat sinks according to claim 1, characterized in that: The limiting mechanism (2) further comprises a spring groove (205), a compression spring (207), a sliding groove (208), a sliding rod (209), an extrusion spring (210) and a limiting groove (211); the front and rear surfaces of the limiting arc plate (204) are both provided with a spring groove (205); one end of the limiting rod (206) is slidably inserted into the interior of the spring groove (205); a compression spring (207) is movably installed between the limiting rod (206) and the interior of the spring groove (205). 07), two sliding grooves (208) are provided at the top of the mold shell structure (1) near the limiting arc plate (204), and the interior of the sliding groove (208) is provided with a limiting groove (211), and the other end of the limiting rod (206) is slidably inserted into the interior of the limiting groove (211), and the interior of the sliding groove (208) is slidably installed with a sliding rod (209), and an extrusion spring (210) is movably installed between the sliding rod (209) and the interior of the sliding groove (208).

3. The stack riveting die for stack riveting of heat sinks according to claim 2, characterized in that: The mold shell structure (1) comprises a base (101), positioning holes (102), a support plate (103), a bottom plate (104), a pallet (107), a mold mounting groove (109) and a mounting groove (111); a plurality of support plates (103) are fixedly mounted on the bottom end of the base (101); a bottom plate (104) is fixedly mounted on the bottom end of the support plate (103); a plurality of positioning holes (102) are provided on both sides of the top surface of the base (101); four mold mounting grooves (109) are sequentially provided on the top surface of the base (101) from front to back; a pallet (107) is fixedly mounted at a position near the mold mounting groove (109) at the bottom end of the base (101); and a plurality of mounting grooves (111) are provided on the top surface of the base (101).

4. The stack riveting die for stack riveting of heat sinks according to claim 3, characterized in that: The mold shell structure (1) further comprises a discharge inclined plate (105), a support plate through groove (106), a waste outlet (108) and a support plate outer groove (110); the surface of each support plate (103) is provided with a support plate through groove (106); a waste outlet (108) is provided between every two support plates (103); two discharge inclined plates (105) are fixedly installed inside the three waste outlets (108) on the rear side; and the positions of the support plates (103) where the support plate through groove (106) is provided are provided with a support plate outer groove (110).

5. The stack riveting die for stack riveting of heat sinks according to claim 4, characterized in that: The discharging structure (4) comprises a conveyor belt (401), a conical material baffle plate (402), a mounting plate (403) and a rotating shaft (404); the conveyor belt (401) is movably mounted on the top surface of the bottom plate (104); two rotating shafts (404) are arranged inside the conveyor belt (401); the rotating shafts (404) are rotatably connected to the inner wall of the bottom plate (104); three conical material baffle plates (402) are movably mounted on the top of the conveyor belt (401); and the mounting plates (403) are fixedly mounted on the tops of the conical material baffle plates (402).

6. The stack riveting die for stack riveting of heat sinks according to claim 5, characterized in that: The limiting arc plates (204) are rotated and inserted into the interior of the installation grooves (111), and sliding grooves (208) are provided at the front and rear positions of the top surface of the base (101) close to the limiting arc plates (204).

7. The stack riveting die for stack riveting of heat sinks according to claim 5, characterized in that: The conical material blocking plates (402) are all movably inserted into the interior of the support plate through grooves (106), and the mounting plates (403) are all movably inserted into the interior of the support plate outer grooves (110).

8. The riveting die for riveting heat sinks according to claim 5, characterized in that: The punching die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are all movably snapped into the interior of the die mounting groove (109); the outer surfaces of the top ends of the punching die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are all provided with snapping grooves; the limiting frames (201) are all movably snapped into the interior of the snapping grooves.

9. The stack riveting die for stack riveting of heat sinks according to claim 5, characterized in that: A plurality of material strip baffles (3) are provided on both sides of the top of the base (101), and the material strip baffles (3) are threadedly connected to the outer surface of the base (101) via bolts. A stamping upper die is provided above the mold shell structure (1), and a plurality of stamping heads and positioning rods are provided at the bottom end of the stamping upper die, and the positioning rods are movably inserted into the interior of the positioning holes (102).

10. A stack riveting die for heat sink stack riveting and a method of use according to any one of claims 1 to 9, characterized in that: The method of use comprises the following steps: Step A: transporting the heat sink aluminum sheet material strip to the rear side of the base (101) through the loading mechanism, allowing the aluminum sheet material strip to pass through the bottom end of the material strip baffle (3), and then punching the aluminum sheet material strip through the punch head of the punching upper die, so that it passes through the punching die (5) and the riveting slotting die (6) in sequence, and after being buffered by the idle step die (7), the material is removed at the position of the blanking die (8) for stacking and riveting, until multiple heat sink aluminum sheets inside the blanking die (8) are stacked and riveted and fall onto the surface of the conveyor belt (401) to be removed; Step B: When it is necessary to perform stamping and riveting on heat sinks of different shapes, the stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) can be replaced so that the through holes on the surfaces of the new stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are consistent with the heat sinks of corresponding models, so as to facilitate the device to produce heat sinks of different models; Step C: When replacing the punching die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8), first press the two sliding rods (209) inwards so that the sliding rods (209) push the limiting rod (206) back to the inside of the spring groove (205). At this time, the limiting arc plate (204) can be rotated outwards from the inside of the mounting groove (111) so that the limiting arc plate (204) and the limiting frame (201) are kept in a vertical state. At this time, the limiting frame (201) can be directly pulled outwards from the top of the die mounting groove (109), thereby releasing the limiting effect of the limiting frame (201) on the punching die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8), and then the punching die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) can be replaced; Step D: After the stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are replaced, the new stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are installed inside the die installation groove (109), and the limiting frames (201) are respectively inserted into the top of the die installation groove (109), so that the stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) are blocked and limited by the limiting frames (201), so as to prevent the stamping die (5), the riveting slotting die (6), the stepping die (7) and the blanking die (8) from being moved during the stamping process. ) and the blanking die (8) may shake due to the inertia of stamping and other factors, and then the limiting rod (206) is pressed inward to make the limiting rod (206) retract to the inside of the spring groove (205), and then the limiting arc plate (204) is rotated in the direction of the installation groove (111) to make the limiting arc plate (204) snap into the inside of the installation groove (111). At this time, the limiting rod (206) is ejected by the elastic potential energy of the compression spring (207), so that the limiting rod (206) snaps into the inside of the limiting groove (211), thereby limiting the limiting arc plate (204) and preventing the limiting arc plate (204) from rotating out by itself due to shaking or other factors; Step E: waste produced during the stamping process will fall along the center of the support plate (107) to the surface of the conveyor belt (401). At this time, the waste produced by the stamping die (5) and the riveting and slotting die (6) will be transported by the conveyor belt (401) and hit the surface of the conical baffle plate (402). The conical surface of the conical baffle plate (402) will move the waste toward the discharge inclined plate (105), and the waste will be discharged from the device through the waste outlet (108) through the inclined surface of the discharge inclined plate (105) to avoid waste accumulation and affect the processing of the device. After the finished heat sink is riveted inside the blanking die (8), it falls to the surface of the conveyor belt (401) and is discharged from the device from the support plate slot (106) below the blanking die (8) through the conveyor belt (401).

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