A continuous forming process for a laminated heat spreading structure

Abstract

The application discloses a laminated heat dissipation structure continuous forming process, which comprises the following steps: after a metal material belt is continuously conveyed by a step-by-step mode and enters between an upper die and a lower die of a step-by-step continuous punching die, T-shaped holes, pilot holes, a plurality of first convexes, a plurality of second convexes, first profile holes, second profile holes, through-hole holes and connecting structures are sequentially formed on the metal material belt by continuous punching of the step-by-step continuous punching die; after the above features are formed in one forming area of the metal material belt, blanking is performed by a blanking station to finally form heat dissipation fins; each formed heat dissipation fin falls into a blanking channel, and the heat dissipation fins are connected by the connecting structures to form a laminated heat dissipation structure. The application improves production efficiency, simplifies the production mode, and does not need manual assistance in the forming process, thereby reducing production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat dissipation structure manufacturing technical field, especially to a laminated heat dissipation structure continuous forming process. BACKGROUND

[0002] The laminated heat dissipation structure is generally applied to electronic devices to quickly dissipate heat during the operation of the electronic devices. However, in the prior art, a connected heat dissipation body with two heat dissipation fins is first punched and formed, and then the heat dissipation body is batch transferred to a bending process, at which time the middle connecting part of the heat dissipation body is symmetrically bent, and then the bent product is batch transferred to a stacking process. In this production mode, manual assistance is required multiple times, which makes the production mode complex, thereby increasing the production cost and reducing the production efficiency. SUMMARY

[0003] The present application aims to solve the above problems of the prior art and provides a laminated heat dissipation structure continuous forming process.

[0004] A laminated heat dissipation structure continuous forming process includes the following steps:

[0005] S1, the metal strip is continuously conveyed by a step-by-step continuous conveying device into the upper die and the lower die of a step-by-step continuous punching die, and a T-shaped hole is punched and formed on the metal strip. During the step-by-step continuous conveying process, multiple T-shaped holes are formed on the metal strip, the multiple T-shaped holes are arranged along the central axis in the length direction of the metal strip and arranged in a "one" shape, and two interval areas between adjacent three T-shaped holes are respectively used as a first pre-forming area and a second pre-forming area;

[0006] S2, during the step-by-step continuous conveying process, multiple first convexities are stamped and formed on the first pre-forming area of the metal strip, and multiple second convexities are stamped and formed on the second pre-forming area of the metal strip;

[0007] S3, during the step-by-step continuous conveying process, a first outer shape hole is punched and formed on the first pre-forming area and the second pre-forming area of the metal strip, the first outer shape hole in the first pre-forming area is located below the area where the first convexity is formed, and the first outer shape hole in the second pre-forming area is located below the area where the second convexity is formed;

[0008] S4, during the step-by-step continuous conveying process, two second outer shape holes are punched and formed on the first pre-forming area and the second pre-forming area of the metal strip, and each second outer shape hole is punched and formed along the inner side edge of the adjacent two T-shaped holes;

[0009] S5, in the step-by-step continuous conveying process, the metal strip is selectively punched and formed with a through-hole to form a first pre-forming area and a second pre-forming area on the metal strip without a through-hole, or to form a first pre-forming area or a second pre-forming area with a through-hole on the metal strip, and the through-hole is formed in the forming position in the first pre-forming area or the second pre-forming area;

[0010] S6, in the step-by-step continuous conveying process, the metal strip is formed with a connecting structure in the forming position in the first pre-forming area and the second pre-forming area without a through-hole.

[0011] S7, the first profile hole and the second profile hole in the first pre-forming area and the second pre-forming area cooperate to form a fin forming boundary, and in the step-by-step continuous conveying process of the metal strip, the first convex and the second convex are punched according to the fin forming boundary, and each fin enters the blanking channel in turn to form a stacked heat dissipation structure, and each fin in the stacked heat dissipation structure is fixed to each other through the connecting structure.

[0012] According to the above-mentioned continuous forming process of the stacked heat dissipation structure, in step S2, the arrangement of the plurality of first convexes and the arrangement of the plurality of second convexes are symmetrically arranged; the plurality of first convexes are respectively arranged in at least three first convexes to form a plurality of convex groups, the plurality of convex groups are arranged in a spaced manner along the axis of the width direction of the metal strip, and the at least three first convexes of each convex group are arranged along the axis of the length direction of the metal strip, and the first convexes between the adjacent two convex groups are arranged in a staggered manner, and the at least three first convexes in each convex group have a first gap, and the first gap is greater than or equal to the length of the second convex; the plurality of second convexes are respectively arranged in at least three second convexes to form a plurality of convex groups, the plurality of convex groups are arranged in a spaced manner along the axis of the width direction of the metal strip, and the at least three second convexes of each convex group are arranged along the axis of the length direction of the metal strip, and the second convexes between the adjacent two convex groups are arranged in a staggered manner, and the at least three second convexes in each convex group have a second gap, and the second gap is greater than or equal to the length of the first convex.

[0013] According to the above-mentioned continuous forming process of the stacked heat dissipation structure, in step S2, the second pre-forming area is located behind the first pre-forming area, and when the first convex is formed in the first pre-forming area, the second pre-forming area is in an idle state.

[0014] According to the above-mentioned continuous forming process of the stacked heat dissipation structure, in step S3, the first profile hole is an elongated hole structure and is in a vertical state, and at least part of the first profile hole is located between the longitudinal end portions of the adjacent two T-shaped holes.

[0015] According to the continuous forming process of the laminated heat dissipation structure, in step S4, the two second profile holes are respectively a left second profile hole and a right second profile hole, and are oppositely arranged, the length of the left second profile hole is greater than the length of the right second profile hole, the first ends of the left second profile hole and the right second profile hole are both inwardly extended to form a first transverse hole, the lengths of the first transverse holes on the two sides are equal, the second ends of the left second profile hole and the right second profile hole are both extended to the first profile hole to form a second transverse hole, the length of the second transverse hole on the left side is greater than the length of the second transverse hole on the right side, and part of the second transverse hole on the left side is in communication with the first profile hole, so as to form a fin forming boundary in the first preforming area and the second preforming area, respectively.

[0016] According to the continuous forming process of the laminated heat dissipation structure, in step S5, when the number of the formed fins reaches the preset number, a through-hole is punched and formed at the two ends of the first preforming area or the second preforming area, and when the number of the formed fins does not reach the preset number, no through-hole is punched and formed on the first preforming area or the second preforming area.

[0017] According to the continuous forming process of the laminated heat dissipation structure, in step S7, after the fin forming boundary is formed, only the part between the rib and the fin forming boundary is punched to form the fin, while the rib and the metal strip are still connected.

[0018] According to the continuous forming process of the laminated heat dissipation structure, in step S7, the fins at one end of each laminated heat dissipation structure in the blanking channel are fixed to the adjacent fins through the through-hole and the connecting structure, the remaining fins are only fixed to each other through the connecting structure, and the fins with the first protrusion are arranged beside the fins with the second protrusion, so that the first protrusion is in contact with the back of the fin with the second protrusion, or the second protrusion is in contact with the back of the fin with the first protrusion, and the first protrusion and the second protrusion in the longitudinally distributed fins of the adjacent two fins are in staggered arrangement, and the first protrusion and the second protrusion in the transversely distributed fins are also in staggered arrangement.

[0019] According to the continuous forming process of the laminated heat dissipation structure, in step S6, the connecting structure is formed by the forming convex part of the male die and the forming concave part of the ejector rod in the step-by-step continuous punching die, the connecting structure includes a recessed part and a protruding part on opposite sides of the fin, the forming convex part of the male die and the forming concave part of the ejector rod are in mutual engagement, and the recessed part and the protruding part are in mutual engagement.

[0020] According to the continuous forming process of the laminated heat dissipation structure, in step S7, the fixed locking strip and the movable locking strip are arranged in the blanking channel, the locking channel for the heat dissipation fins is formed between the fixed locking strip and the movable locking strip, at least one mounting channel is arranged on an inner wall of the blanking channel close to the movable locking strip, the spring and the threaded plug are arranged in the mounting channel, the threaded plug is threadedly connected to the port of the mounting channel, and the two ends of the spring are in contact with the movable locking strip and the threaded plug, respectively.

[0021] The continuous forming process of the laminated heat dissipation structure has the following beneficial effects:

[0022] 1. The continuous forming process of the laminated heat dissipation structure can complete the heat dissipation fins with two different convex arrangement modes in one process, and the heat dissipation fins are directly laminated and connected in the step-by-step continuous punching die to form the laminated heat dissipation structure, so that the laminated product at the end of the forming does not need to be transferred in multiple processes, the production efficiency is further improved, the production mode is simplified, manual assistance is not needed in the forming process, and therefore the production cost is reduced.

[0023] 2. Only the rib and the heat dissipation fin forming boundary are punched to form the heat dissipation fin when the heat dissipation fin is blanked, the contact area of the punching is small, and the rib has a space, a through-hole forming station and a connecting structure forming station before blanking, so that the area of the rib is small and the rib is easily flattened by the upper die and the upper die stamping before blanking, and the influence of blanking stamping on the flatness of the heat dissipation fin product is further greatly reduced.

[0024] 3. The convex part of the punch and the forming concave part of the ejector pin in the step-by-step continuous punching die are arranged to be matched with each other, so that the concave part and the convex part formed on the opposite sides of the heat dissipation fin are also in a matched structure, the convex part in the adjacent two laminated heat dissipation fins is riveted in the concave part, the riveting between the heat dissipation fins is reliable, the structure after riveting is not easy to deform, the technical problem that the rivet point formed on the aluminum material belt is too weak in rigidity, the rivet point after forming is deformed by the ejector pin, the size of the rivet point does not meet the requirements, and the laminating force between the heat dissipation fins is very small and even the heat dissipation fins cannot be laminated is solved.

[0025] 4. The locking strip is elastically movable, the locking amount can be elastically adjusted, the compression amount of the spring is controlled through the threaded plug, the purpose of adjusting the locking amount is achieved, the locking amount required by the product is quickly adjusted, the technical problem that the aluminum heat dissipation fin is sensitive to the locking amount, the product shape is deformed and roughened when the locking amount is large, the rivet point of the product cannot be riveted to each other when the locking amount is small, and the product cannot be laminated is solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole process layout drawing.

[0027] Figure 2 Fig. 1 is a schematic diagram of a heat sink structure with a first protrusion and a connecting structure.

[0028] Figure 3 Fig. 2 is a schematic diagram of a heat sink structure with a first protrusion and a through structure.

[0029] Figure 4 Fig. 3 is a schematic diagram of a heat sink structure with a first protrusion and a connecting structure (2).

[0030] Figure 5 Fig. 4 is a schematic diagram of a heat sink structure with a second protrusion and a connecting structure (1).

[0031] Figure 6 Fig. 5 is a schematic diagram of a heat sink structure with a second protrusion and a through structure.

[0032] Figure 7 Fig. 6 is a schematic diagram of a heat sink structure with a second protrusion and a connecting structure (2).

[0033] Figure 8 Fig. 7 is a schematic diagram of a laminated heat dissipation structure (1).

[0034] Figure 9 Fig. 8 is a schematic diagram of a laminated heat dissipation structure (2).

[0035] Figure 10 Fig. 9 is a schematic diagram of a molding structure for molding recesses and protrusions.

[0036] Figure 11 Fig. 10 is a schematic diagram of a structure for connecting a heat sink molding boundary with a metal strip and a metal strip.

[0037] Figure 12 Fig. 11 is a schematic diagram of a locking structure in a blanking channel (1).

[0038] Figure 13 Fig. 12 is a schematic diagram of a locking structure in a blanking channel (2).

[0039] In the figure: 100, metal strip; 101, rib;

[0040] 1, first station; 2, second station; 3, third station; 4, fourth station; 5, fifth station; 6, sixth station; 7, seventh station; 8, eighth station; 9, blanking station; 11, T-shaped opening station; 21, guide hole; 31, first convex; 41, second convex; 51, first profile hole; 61, second profile hole; 62, first transverse hole; 63, second transverse hole; 71, through-hole; 81, connecting structure; 82, formed convex; 83, ejector rod; 831, formed concave; 90, blanking channel; 91, heat dissipation fin; 92, fixed locking strip; 93, movable locking strip; 94, mounting channel; 95, spring; 96, threaded plug; 97, locking channel; 98, laminated heat dissipation structure; 911, tab; 912, raised portion; 913, formed recess;

[0041] Embodiment

[0042] The application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] Embodiment

[0044] The embodiment describes a laminated heat dissipation structure 98 continuous forming process, which includes a step-by-step continuous blanking die, and the upper die and lower die of the step-by-step continuous blanking die are combined to form a laminated heat dissipation structure 98 continuous forming station; the laminated heat dissipation structure 98 continuous forming station includes, from left to right, a first station 1 for T-shaped hole forming, a second station 2 for guide hole 21 forming, a third station 3 for a plurality of first convexes 31 forming, a fourth station 4 for a plurality of second convexes 41 forming, a fifth station 5 for first profile hole 51 forming, a sixth station 6 for second profile hole 61 forming, a seventh station 7 for through-hole 71 forming, an eighth station 8 for connecting structure 81 forming, and a blanking station 9, each station having a convex die and a concave die structure corresponding to the formed features; after the metal strip is conveyed step by step into the upper die and lower die of the step-by-step continuous blanking die, the metal strip is sequentially formed with T-shaped hole, guide hole 21, a plurality of first convexes 31, a plurality of second convexes 41, first profile hole 51, second profile hole 61, through-hole 71 and connecting structure 81, and after the above features are formed in one forming area of the metal strip, the blanking station 9 is used for blanking to finally form the heat dissipation fin 91, and the specific forming method is as follows.

[0045] A laminated heat dissipation structure 98 continuous forming process, comprising the following steps:

[0046] S1, the metal strip is continuously conveyed into the upper die and the lower die of the step-by-step continuous blanking die, and the metal strip is punched to form T-shaped holes in the first station 1. During the step-by-step continuous conveying, multiple T-shaped holes are formed on the metal strip, and the multiple T-shaped holes are arranged along the central axis in the length direction of the metal strip and arranged in a "one" shape. Two interval areas between adjacent three T-shaped holes are respectively used as a first preforming area and a second preforming area. The intervals between the formed T-shaped holes are equal, and the metal strip is made of aluminum material.

[0047] S2, multiple first convexes 31 are punched and formed in the first preforming area on the metal strip during the step-by-step continuous conveying. The second preforming area is located behind the first preforming area. When the first convexes 31 are formed in the first preforming area, the second preforming area is in an idle state to form the second convexes 41. Therefore, during the continuous conveying of the metal strip, the second preforming area in the idle state is conveyed to the fourth station 4, and then multiple second convexes 41 are punched and formed in the second preforming area on the metal strip through a punching operation.

[0048] Preferably, the arrangement of the multiple first convexes 31 and the arrangement of the multiple second convexes 41 are symmetrically arranged with each other. Specifically, the multiple first convexes 31 are respectively arranged in multiple groups of convexes, each group of convexes including at least three first convexes 31. The multiple groups of convexes are arranged in an interval manner along the axis in the width direction of the metal strip. The at least three first convexes 31 in each group of convexes are arranged along the axis in the length direction of the metal strip. The first convexes 31 between adjacent two groups of convexes are arranged in a staggered manner. The at least three first convexes 31 in each group of convexes have a first gap therebetween, and the first gap is greater than or equal to the length of the second convexes 41. The multiple second convexes 41 are respectively arranged in multiple groups of convexes, each group of convexes including at least three second convexes 41. The multiple groups of convexes are arranged in an interval manner along the axis in the width direction of the metal strip. The at least three second convexes 41 in each group of convexes are arranged along the axis in the length direction of the metal strip. The second convexes 41 between adjacent two groups of convexes are arranged in a staggered manner. The at least three second convexes 41 in each group of convexes have a second gap therebetween, and the second gap is greater than or equal to the length of the first convexes 31. The groups of convexes combined by the first convexes 31 and the groups of convexes combined by the second convexes 41 can be arranged in 15 rows respectively. The groups of convexes in the first preforming area and the groups of convexes in the second preforming area are arranged in a corresponding manner. The even-numbered rows of groups of convexes in the first preforming area are arranged closer to the left T-shaped hole, and the odd-numbered rows of groups of convexes are arranged closer to the right T-shaped hole. The even-numbered rows of groups of convexes in the second preforming area are arranged closer to the right T-shaped hole, and the odd-numbered rows of groups of convexes are arranged closer to the left T-shaped hole. The multiple groups of convexes are arranged in an interval manner with equal intervals.

[0049] S3, the metal strip is punched and formed with first profile holes 51 on the first preforming area and the second preforming area on the metal strip in a step-by-step continuous conveying process, the first profile holes 51 in the first preforming area are located below the area where the first protrusions 31 are formed, and the first profile holes 51 in the second preforming area are located below the area where the second protrusions 41 are formed; the first profile holes 51 are long hole structures and are in a vertical state, and at least part of the first profile holes 51 is located between the longitudinal end portions of two adjacent T-shaped holes, and this step is to prepare for forming the tabs 911 on the fins 91.

[0050] S4, the metal strip is punched and formed with two second profile holes 61 on the first preforming area and the second preforming area on the metal strip in a step-by-step continuous conveying process, each second profile hole 61 is punched and formed along the inner side edges of two adjacent T-shaped holes, wherein the two second profile holes 61 are a left second profile hole 61 and a right second profile hole 61 and are oppositely arranged, the length of the left second profile hole 61 is greater than the length of the right second profile hole 61, and the first ends of the left second profile hole 61 and the right second profile hole 61 are both inwardly extended to form a first transverse hole 62, the lengths of the first transverse holes 62 on both sides are equal, and the second ends of the left second profile hole 61 and the right second profile hole 61 are both extended in the direction of the first profile holes 51 to form a second transverse hole 63, the length of the left second transverse hole 63 is greater than the length of the right second transverse hole 63, and part of the left second transverse hole 63 is in communication with the first profile hole 51 to form a fin 91 forming boundary in the first preforming area and the second preforming area, respectively, and this step is to form the fins 91 with tabs 911 at last, and the rest of the material is removed, only the ribs are connected with the metal strip, so that the edge is subsequently punched and the fin 91 is discharged.

[0051] S5, the metal strip is selectively punched and formed with a through-hole 71 on the metal strip in a step-by-step continuous conveying process, so that the metal strip forms a first preforming area and a second preforming area without a through-hole 71, that is, when the number of fins 91 formed does not reach the preset number, no through-hole 71 punching process is performed on the first preforming area or the second preforming area, or the metal strip forms a first preforming area or a second preforming area with a through-hole 71, and the through-hole 71 is formed on the forming position in the first preforming area or the second preforming area, that is, when the number of fins 91 formed reaches the preset number, a through-hole 71 is punched and formed at both ends of the first preforming area or the second preforming area, respectively, and this step is to separate each stacked heat dissipation structure 98 in the discharging channel 90.

[0052] S6, the metal strip is formed in the forming position of the first preforming area and the second preforming area without the through-hole 71 in the step-by-step continuous conveying process. Since the first preforming area and the second preforming area have been formed with the through-hole 71, the punch for forming the connecting structure 81 in the seventh station directly penetrates the through-hole 71. Therefore, the first preforming area and the second preforming area cannot form the connecting structure 81. The connecting structure 81 is formed by the forming protrusion 82 of the punch and the forming recess 831 of the ejector pin 83 in the step-by-step continuous blanking die. The forming protrusion 82 of the punch and the forming recess 831 of the ejector pin 83 are in engagement with each other. When the connecting structure 81 is formed, the forming protrusion 82 presses the upper side of the preforming area, and the forming recess 831 supports the lower side of the fin 91. At this time, the forming protrusion 82 of the punch and the forming recess 831 of the ejector pin 83 are arranged opposite to each other. The part to be punched is extruded into the forming recess 831 by the forming protrusion 82, so that the recessed part 913 and the protruding part 912 are formed on the opposite sides of the fin 91, and the recessed part and the protruding part 912 are in engagement with each other. The connecting structure 81 is composed of the recessed part 913 and the protruding part 912.

[0053] S7, the first outer shape hole 51 and the second outer shape hole 61 in the first preforming area and the second preforming area are matched to form the fin 91 forming boundary. In the step-by-step continuous conveying process of the metal strip, the fin 91 with the first protrusion 31 and the fin 91 with the second protrusion 41 are formed by blanking according to the fin 91 forming boundary. Each fin 91 enters the blanking channel 90 in turn to form the stacked heat dissipation structure 98. The fins 91 in each stacked heat dissipation structure 98 in the blanking channel 90 are fixed to each other through the through-hole 71 and the connecting structure 81 between one end of the fin 91 and the adjacent fin 91, and the remaining fins 91 are fixed to each other only through the connecting structure 81. The plurality of fins 91 are arranged in a stacked manner with the fin 91 with the first protrusion 31 located beside the fin 91 with the second protrusion 41, so that the first protrusion 31 is in contact with the back of the fin 91 with the second protrusion 41, or the second protrusion 41 is in contact with the back of the fin 91 with the first protrusion 31. The first protrusion 31 and the second protrusion 41 in the longitudinal distribution of the adjacent two fins 91 are arranged in a staggered manner, and the first protrusion 31 and the second protrusion 41 in the transverse distribution are also arranged in a staggered manner. The stacked heat dissipation structure 98 uses the staggered arrangement of the first protrusion 31 and the second protrusion 41 to connect and fix the fins 91 to each other, so that the fins 91 form heat dissipation channels between each other, thereby improving the heat dissipation performance of the stacked heat dissipation structure 98.

[0054] Preferably, after the fin 91 forming boundary is formed, the fin 91 forming boundary is only subjected to blanking treatment between the rib and the fin 91 forming boundary while the rib is still connected to the metal strip, so as to form the fin 91. Since the blanking contact area is small, and the rib has a space before blanking, the through-hole 71 forming station and the connecting structure 81 forming station, the area of the rib is small and is easily flattened by the upper die and the upper die punch before blanking, further greatly reducing the influence of blanking and stamping on the flatness of the fin 91 product.

[0055] In the embodiment, the blanking channel 90 is provided with fixed locking strips 92 and movable locking strips 93 arranged at intervals. The fixed locking strips 92 and the movable locking strips 93 form a locking channel 97 for the fin 91 to pass through. An inner wall of the blanking channel 90 near the movable locking strips 93 is provided with at least one mounting channel 94. The mounting channel 94 is provided with a spring 95 and a threaded plug 96. The threaded plug 96 is threadedly connected to the port of the mounting channel 94. The ends of the spring 95 are in contact with the movable locking strips 93 and the threaded plug 96, respectively. An active gap is formed between the inner wall of the blanking channel 90 near the movable locking strips 93 and the back surface of the movable locking strips 93. The locking strips are elastically movable, so that the locking amount can be adjusted elastically. The compression amount of the spring 95 is controlled by the threaded plug 96, so as to adjust the locking amount and quickly adjust the locking amount to the required force of the product. The problem that the aluminum fin 91 is sensitive to the locking amount, the product shape is deformed and roughened when the locking amount is large, and the rivets of the product cannot be riveted to each other when the locking amount is small, so that the product cannot be stacked, is solved.

Claims

1. A continuous molding process for a stacked heat dissipation structure (98), characterized in that, Includes the following steps: S1. The metal strip is continuously conveyed by a stepping type and enters between the upper and lower dies of the stepping continuous punching die. T-shaped holes are punched and formed on the metal strip. During the stepping continuous conveying process, multiple T-shaped holes are formed on the metal strip. The multiple T-shaped holes are arranged along the central axis of the length direction of the metal strip and are arranged in a "I" shape. The two interval areas between three adjacent T-shaped holes are respectively used as the first pre-forming area and the second pre-forming area. S2. During the step-by-step continuous conveying process, multiple first protrusions (31) are stamped in the first pre-forming area of ​​the metal strip, and multiple second protrusions (41) are stamped in the second pre-forming area of ​​the metal strip. S3. During the step-by-step continuous conveying process, the metal strip is punched with a first external hole (51) in both the first pre-forming area and the second pre-forming area. The first external hole (51) in the first pre-forming area is located below the area with the first convex hull (31) formed, and the first external hole (51) in the second pre-forming area is located below the area with the second convex hull (41) formed. S4. During the step-by-step continuous conveying process, two second external holes (61) are punched in the first pre-forming area and the second pre-forming area of ​​the metal strip. Each second external hole (61) is punched along the inner edge of two adjacent T-shaped holes. S5. During the step-by-step continuous conveying process, through holes (71) are selectively punched on the metal strip to form a first pre-forming area and a second pre-forming area without through holes (71) on the metal strip, or to form a first pre-forming area or a second pre-forming area with through holes (71) on the metal strip. The through holes (71) are formed at the forming position in the first pre-forming area or the second pre-forming area. S6. During the step-by-step continuous conveying process, the metal strip forms a connecting structure (81) on the forming position in the first preforming area and the second preforming area where the through hole (71) has not yet been formed; S7. The first outer hole (51) and the second outer hole (61) in the first preforming area and the second preforming area cooperate to form the forming boundary of the heat sink (91). During the step-by-step continuous conveying of the metal strip, the heat sink (91) with the first convex bulge (31) and the heat sink (91) with the second convex bulge (41) are formed by punching according to the forming boundary of the heat sink (91). Each heat sink (91) enters the material drop channel (90) in sequence to form a stacked heat dissipation structure (98). Each heat sink (91) in the stacked heat dissipation structure (98) is fixed to each other by the connecting structure (81).

2. The continuous forming process of the stacked heat dissipation structure (98) according to claim 1, characterized in that: In step S2, the arrangement of the multiple first convex hulls (31) is symmetrical to the arrangement of the multiple second convex hulls (41); Multiple first protrusions (31) are arranged in groups of at least three first protrusions (31) to form multiple protrusion groups. The multiple protrusion groups are arranged in a spaced manner along the axis of the width direction of the metal strip. At least three first protrusions (31) in each protrusion group are arranged along the axis of the length direction of the metal strip. The first protrusions (31) between adjacent protrusion groups are staggered. There is a first gap between at least three first protrusions (31) in each protrusion group. The first gap is greater than or equal to the length of the second protrusion (41). Multiple second protrusions (41) are arranged in groups of at least three to form multiple protrusion groups. The multiple protrusion groups are arranged in an intermittent manner along the axis of the width direction of the metal strip. At least three second protrusions (41) in each protrusion group are arranged along the axis of the length direction of the metal strip. The second protrusions (41) between adjacent protrusion groups are staggered. There is a second gap between at least three second protrusions (41) in each protrusion group. The second gap is greater than or equal to the length of the first protrusion (31).

3. The continuous forming process of the stacked heat dissipation structure (98) according to claim 1, characterized in that: In step S2, the second preforming area is located behind the first preforming area, and the second preforming area is in an empty state when the first preforming area forms the first convex bulge (31).

4. The continuous forming process of the stacked heat dissipation structure (98) according to claim 1, characterized in that: In step S3, the first external hole (51) is an elongated hole structure and is in a vertical state, and at least a portion of the first external hole (51) is located between the longitudinal ends of two adjacent T-shaped holes.

5. The continuous forming process of the stacked heat dissipation structure (98) according to claim 1, characterized in that: In step S4, the two second outer shape holes (61) are the left second outer shape hole (61) and the right second outer shape hole (61) respectively, and are arranged opposite to each other. The length of the left second outer shape hole (61) is greater than the length of the right second outer shape hole (61). The first ends of the left second outer shape hole (61) and the right second outer shape hole (61) extend inward to form a first transverse hole (62). The lengths of the first transverse holes (62) on both sides are equal. The second ends of the left second outer shape hole (61) and the right second outer shape hole (61) extend towards the first outer shape hole (51) to form a second transverse hole (63). The length of the left second transverse hole (63) is greater than the length of the right second transverse hole (63), and part of the left second transverse hole (63) is connected to the first outer shape hole (51), thereby forming the heat sink (91) forming boundary in the first preforming area and the second preforming area respectively.

6. The continuous forming process of the stacked heat dissipation structure (98) according to claim 2, characterized in that: In step S5, when the number of heat sink (91) formed reaches the preset number, through holes (71) are punched at both ends of the first preforming area or the second preforming area. When the number of heat sink (91) formed does not reach the preset number, through holes (71) are not punched in the first preforming area or the second preforming area.

7. The continuous forming process of the stacked heat dissipation structure (98) according to claim 5, characterized in that: In step S7, after the heat sink (91) forming boundary is formed, and the heat sink (91) forming boundary is still connected to the metal strip through the ribs, only the ribs and the heat sink (91) forming boundary are punched to form the heat sink (91).

8. The continuous forming process of the stacked heat dissipation structure (98) according to claim 7, characterized in that: In step S7, the heat sink (91) at one end of each stacked heat dissipation structure (98) in the material feeding channel (90) is connected to its adjacent heat sink (91) through a through hole. 71) and the connecting structure (81) are fixed together, and the other heat sinks (91) are fixed together only through the connecting structure (81). The heat sinks (91) with the first convex bud (31) are arranged next to the heat sinks (91) with the second convex bud (41). This makes the first convex bud (31) abut against the back of the heat sink (91) with the second convex bud (41), or the second convex bud (41) abut against the back of the heat sink (91) with the first convex bud (31). In two adjacent heat sinks (91), the first convex bud (31) and the second convex bud (41) distributed longitudinally are staggered, and the first convex bud (31) and the second convex bud (41) distributed laterally are also staggered.

9. The continuous forming process of the stacked heat dissipation structure (98) according to claim 1, characterized in that: In step S6, the forming protrusion (82) of the punch in the step-type continuous punching die and the forming recess (831) of the ejector pin (83) are used to form a connecting structure (81). The connecting structure (81) includes a recess and a protrusion (912) located on opposite sides of the heat sink (91). The forming protrusion (82) of the punch and the forming recess (831) of the ejector pin (83) fit together, and the recess and the protrusion (912) fit together.

10. The continuous forming process of a stacked heat dissipation structure (98) according to claim 8, characterized in that: In step S7, a fixed locking bar (92) and a movable locking bar (93) are provided in the material feeding channel (90) at intervals. A locking channel (97) for the heat sink (91) to pass through is formed between the fixed locking bar (92) and the movable locking bar (93). At least one installation channel (94) is provided on an inner wall of the material feeding channel (90) near the movable locking bar (93). A spring (95) and a threaded plug (96) are provided in the installation channel (94). The threaded plug (96) is threadedly connected to the port of the installation channel (94), and the two ends of the spring (95) abut against the movable locking bar (93) and the threaded plug (96) respectively.

Images