Automatic screw locking machine for special-shaped cooling fins

Abstract

The utility model relates to an automatic screw locking machine for special-shaped radiating fins, which comprises a double-station working table, a positioning jig is arranged on the double-station working table, the positioning jig comprises a base, a positioning plate and a cover plate, the base is connected with a sliding table of a linear module, the positioning plate is erected on the base, a plurality of positioning holes for placing the special-shaped radiating fins are formed in the positioning plate, and the cover plate is arranged on the positioning plate. The positioning hole comprises a groove and a hole, the groove is matched with the transverse part of the special-shaped cooling fin, the hole is vertically communicated with the groove, the hole penetrates through the positioning plate in the thickness direction and leads to an empty space between the positioning plate and the base, and the hole is matched with the vertical part of the special-shaped cooling fin; the cover plate is movably arranged on the upper side of the positioning plate through the overturning assembly, and a plurality of positioning holes are formed in the cover plate and matched with the insulated gate bipolar transistors. According to the utility model, the relatively long vertical part of the special-shaped radiating fin is accommodated through the empty space and the shaped hole, so that the transverse part can be well positioned in the shaped groove, and the special-shaped radiating fin can be accurately positioned with the insulated gate bipolar transistor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lock screw machine technical field, especially a kind of automatic lock screw machine for special-shaped heat dissipation fin. BACKGROUND

[0002] Insulated Gate Bipolar Transistor (IGBT) as power semiconductor element has been widely applied in many electric appliances, IGBT will generate a lot of heat in the working process, IGBT's heat dissipation is not enough to quickly transfer these heat away, it needs to cooperate with heat dissipation fin to effectively dissipate heat, heat dissipation fin is assembled with IGBT by screw, in order to ensure that both can transfer heat well, heat-conducting silicone grease needs to be daubed between IGBT and heat dissipation fin.

[0003] In product design, the shape of heat-conducting fin will be adaptively designed according to the structure inside electric appliance, when the structure inside electric appliance is relatively compact, heat-conducting fin will be designed into unconventional shape, these special-shaped heat-conducting fins face the problem of difficult positioning with IGBT when assembling on lock screw machine, leading to inaccurate dispensing position, misplacement of heat-conducting fin and IGBT, thereby affecting production quality and qualification rate of product. INVENTION CONTENTS

[0004] In order to solve the deficiency of prior art, the utility model provides a kind of automatic lock screw machine for special-shaped heat dissipation fin.

[0005] The utility model provides a kind of automatic lock screw machine for special-shaped heat dissipation fin, including double-station workbench, be provided with positioning jig on the double-station workbench, the positioning jig includes base, positioning plate and cover plate, the base is connected with the sliding table of linear module, the positioning plate is erected on base, a plurality of positioning holes for placing special-shaped heat dissipation fin are opened in the positioning plate, the positioning hole includes type groove and type hole, the type groove is matched with the horizontal part of special-shaped heat dissipation fin, the type hole is perpendicular to type groove, the type hole is along the thickness direction and is through positioning plate, and it leads to the overhead layer between positioning plate and base, the type hole is matched with the vertical part of special-shaped heat dissipation fin;The cover plate is movably arranged on the upside of positioning plate by turnover component, a plurality of positioning holes are opened in the cover plate, the positioning hole is matched with insulated gate bipolar transistor, when the cover plate is covered on the positioning plate, the cover plate is pressed on the horizontal part of special-shaped heat dissipation fin, and the positioning hole is located in the directly above corresponding positioning hole.

[0006] In some embodiments, the type groove is provided with two position-avoiding grooves on the side away from the type hole, and the position-avoiding groove is matched with the fixing foot of the special-shaped heat dissipation fin.

[0007] In some embodiments, the groove bottom of the type groove is provided with a position-avoiding hole, and the position-avoiding hole is matched with the screw hole of the special-shaped heat dissipation fin.

[0008] In some embodiments, the transverse part and the vertical part of the profiled heat dissipation fin are perpendicular to each other to form an L-shaped profiled heat dissipation fin.

[0009] In some embodiments, the positioning plate is erected above the base through the cushion blocks, the cushion blocks are located at the corners of the positioning plate, and the base is provided with a stop edge outside the cushion blocks to position the cushion blocks and the positioning plate.

[0010] In some embodiments, the turnover assembly comprises a driving cylinder, a connecting head, a curved arm, and a rotating rod, the fixed end of the driving cylinder is pivotally connected with the positioning plate, the driving end of the driving cylinder is fixed with the connecting head, one end of the curved arm is pivotally connected with the connecting head, the other end of the curved arm is fixed at the end of the rotating rod, the rotating rod is movably arranged on the positioning plate through a bearing seat and is parallel to the cover plate, and the edge of the rotating rod is fixedly connected with the cover plate.

[0011] In some embodiments, the double-station workbench is provided with a screw locking device and a dispensing device above the double-station workbench, the screw locking device fixes the insulated gate bipolar transistor and the profiled heat dissipation fin through screws to form an assembly, and the dispensing device dispenses heat-conducting silicone grease on the end surface of the transverse part of the profiled heat dissipation fin through the positioning hole of the cover plate.

[0012] In some embodiments, the feeding device further comprises a feeding mechanical arm and a feeding slide, the feeding mechanical arm reciprocally moves between the double-station workbench and the feeding slide, the feeding mechanical arm adsorbs the assembly through a suction cup and carries the assembly to the feeding slide, the assembly slides along the feeding slide under the action of gravity, the feeding slide comprises a first slide rod, a second slide rod and a third slide rod, the first slide rod and the second slide rod are located on the same side, the third slide rod is located on the other side to form a track for the vertical part of the profiled heat dissipation fin to slide, the corner of the transverse part and the vertical part of the profiled heat dissipation fin is erected on the first slide rod, the second slide rod is in contact with the middle part of the vertical part, and the third slide rod is in contact with the end of the vertical part away from the transverse part.

[0013] In some embodiments, the feeding slide is provided with a connection position, the third slide rod does not extend to the connection position, one end of the third slide rod close to the connection position is provided with an arc-shaped guide section, and the arc-shaped guide section forms an outwardly expanding opening between the first slide rod and the second slide rod.

[0014] Compared with the prior art, the positioning jig accurately positions the profiled heat dissipation fin and the insulated gate bipolar transistor through the positioning holes and the positioning holes respectively, the profiled heat dissipation fin is accommodated in the overhang layer and the profiled hole between the positioning plate and the base, the transverse part is well positioned in the profiled groove, the profiled heat dissipation fin is accurately positioned with the insulated gate bipolar transistor, the cover plate is automatically turned over through the turnover assembly, and the feeding and discharging are facilitated.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the automatic screw locking machine for special-shaped heat dissipation fins of the embodiment of the present application.

[0016] Figure 2 is a three-dimensional structural schematic diagram of the positioning jig of the embodiment of the present application.

[0017] Reference signs:

[0018] 101, special-shaped heat dissipation fin; 102, vertical part; 103, horizontal part; 104, screw hole; 105, fixing foot; 201, insulated gate bipolar transistor; 202, pin; 301, assembly;

[0019] 1, double-station workbench; 11, linear module; 12, screw locking device; 13, glue dispensing device;

[0020] 2, positioning jig;

[0021] 3, base; 31, air layer; 32, cushion block; 33, blocking edge;

[0022] 4, positioning plate; 41, positioning hole; 42, profile groove; 43, profile hole; 44, avoidance slot; 45, avoidance hole;

[0023] 5, cover plate; 51, positioning hole; 52, overturning assembly; 53, driving cylinder; 54, connecting head; 55, curved arm; 56, rotating rod; 57, bearing seat;

[0024] 6, blanking device;

[0025] 7, blanking manipulator; 71, blanking cylinder; 72, lifting guide rail; 73, material taking seat; 74, suction cup;

[0026] 8, blanking slide; 81, first slide rod; 82, second slide rod; 83, third slide rod; 84, track; 85, connection position; 86, arc-shaped guide section; 87, opening. DETAILED DESCRIPTION

[0027] The specific implementation manner of the present application is described with reference to the drawings.

[0028] Reference Figure 1 , the figure is a three-dimensional structural schematic diagram of the automatic screw locking machine for special-shaped heat dissipation fins, the machine is provided with two linear modules 11, double stations are arranged through the two linear modules 11, screw locking operation is carried out on the left station, blanking of the assembly 301 is carried out on the right station, different operations are carried out on the two stations at the same time, and the production efficiency of the machine is improved.

[0029] Reference Figures 1 to 2The utility model provides an automatic screw locking machine for special-shaped radiating fin, including double position workbench 1, be provided with positioning fixture 2 on double position workbench 1, positioning fixture 2 includes base 3, positioning plate 4 and cover plate 5, base 3 is connected with the sliding table of linear module 11, positioning plate 4 is erected on base 3, a plurality of positioning holes 41 that place special-shaped radiating fin 101 are opened on positioning plate 4, positioning hole 41 includes type groove 42 and type hole 43, type groove 42 is matched with the transverse portion 103 of special-shaped radiating fin 101, type hole 43 is perpendicular to type groove 42, type hole 43 is along the thickness direction and passes through positioning plate 4, and is led to the overhead layer 31 between positioning plate 4 and base 3, type hole 43 is matched with the vertical portion 102 of special-shaped radiating fin 101, cover plate 5 is movably arranged on the upside of positioning plate 4 through turnover assembly 52, a plurality of positioning holes 51 are opened on cover plate 5, positioning hole 51 is matched with insulated gate bipolar transistor 201, when cover plate 5 covers positioning plate 4, cover plate 5 is pressed on the transverse portion 103 of special-shaped radiating fin 101, and positioning hole 51 is located just above corresponding positioning hole 41.

[0030] The utility model discloses an automatic screw locking machine for special-shaped radiating fin, through the positioning hole 41 and positioning hole 51 of positioning fixture 2 respectively accurate positioning special-shaped radiating fin 101 and insulated gate bipolar transistor 201, through the overhead layer 31 and type hole 43 between positioning plate 4 and base 3 to accommodate the longer vertical portion 102 of special-shaped radiating fin 101, so that the transverse portion 103 can be well positioned in type groove 42, ensure that special-shaped radiating fin 101 can be accurately positioned with insulated gate bipolar transistor 201, through the automatic turnover of turnover assembly 52, the cover plate 5 is convenient to feed and discharge.

[0031] Need further explanation, cover plate 5 has two states, as shown in Figure 1 The left side work position cover plate 5 covers positioning plate 4, when cover plate 5 is covered, need to carry out point gluing operation, insulated gate bipolar transistor 201 feeding and screw locking operation in turn, the right side work position cover plate 5 is turned up 90 degrees, when turning over cover plate 5, need to carry out assembly body 301 discharge and special-shaped radiating fin 101 feeding in turn, after special-shaped radiating fin 101 is fed by feeding manipulator, cover plate 5 is turned down and covers positioning plate 4.

[0032] In order to better position special-shaped radiating fin 101, in the embodiment, reference Figure 2 Type groove 42 is provided with two position avoidance grooves 44 on the side away from type hole 43, and the position avoidance grooves 44 are matched with the fixing feet 105 of the special-shaped radiating fin 101.

[0033] It can be understood that when the special-shaped heat dissipation sheet 101 is placed in the positioning hole 41, the transverse part 103 of the special-shaped heat dissipation sheet 101 is positioned in the type groove 42, and the fixing foot 105 can be accurately placed in the avoiding groove 44, avoiding interference and collision between the fixing foot 105 and the inner wall of the positioning hole 41, protecting the fixing foot 105, avoiding damage to the special-shaped heat dissipation sheet 101, and at the same time, ensuring that the special-shaped heat dissipation sheet 101 and the positioning hole 41 can be accurately positioned, so that the special-shaped heat dissipation sheet 101 will not be displaced during the dispensing operation and the screw locking operation, improving the accuracy of dispensing, ensuring that the special-shaped heat dissipation sheet 101 will not be misaligned with the insulated gate bipolar transistor 201, and improving the production quality of the product.

[0034] In order to ensure that the special-shaped heat dissipation sheet 101 and the insulated gate bipolar transistor 201 are assembled in place, in the embodiment, referring to Figure 2 , the groove bottom of the type groove 42 is provided with an avoiding hole 45 matched with the screw hole 104 of the special-shaped heat dissipation sheet 101.

[0035] It can be understood that the thickness of the transverse part 103 of the special-shaped heat dissipation sheet 101 is not very thick, in order to ensure that the screw can have more contact length with the special-shaped heat dissipation sheet 101, it is necessary to set the screw hole 104 on the special-shaped heat dissipation sheet 101 as penetrating, and the screw needs to fill the screw hole 104, when the screw fixes the insulated gate bipolar transistor 201 on the special-shaped heat dissipation sheet 101, the tip of the screw will be exposed from the screw hole 104, and the exposed tip will enter the avoiding hole 45, thus providing enough space for the installation of the screw, ensuring that the special-shaped heat dissipation sheet 101 and the insulated gate bipolar transistor 201 can be assembled in place, and ensuring that the connection between the special-shaped heat dissipation sheet 101 and the insulated gate bipolar transistor 201 is firm.

[0036] In order to match the specific space inside the electrical appliance, in the embodiment, referring to Figure 2 , the transverse part 103 of the special-shaped heat dissipation sheet 101 is perpendicular to the vertical part 102 to form an L-shaped special-shaped heat dissipation sheet 101.

[0037] It can be understood that the pin 202 of the insulated gate bipolar transistor 201 and the fixing foot 105 of the special-shaped heat dissipation sheet are on the same side, when the circuit board of the electrical appliance is installed, the pin 202 and the fixing foot 105 are fixed on the circuit board together, the transverse part 103 of the special-shaped heat dissipation sheet will be perpendicular to the circuit board, and the vertical part 102 will be parallel to the circuit board, thus forming a space between the vertical part 102 and the circuit board for installing other components, meeting the installation requirements of the compact internal space of the electrical appliance.

[0038] In order to install the positioning plate 4, in the embodiment, referring to Figure 2The positioning plate 4 is erected above the base 3 through the cushion block 32, the cushion block 32 is located at the corner of the positioning plate 4, and the base 3 is provided with a stop edge 33 outside the cushion block 32 to position the cushion block 32 and the positioning plate 4.

[0039] It can be understood that the base 3 is universal and suitable for screwing operations of different sizes of heat dissipation fins and insulated gate bipolar transistors 201. In order to adapt to the special-shaped heat dissipation fin 101, the positioning plate 4 is raised through the cushion block 32, so as to form an overhanging layer 31 between the positioning plate 4 and the base 3. The stop edge 33 at the four corners of the base 3 positions the cushion block 32 and the positioning plate 4, so that the positioning plate 4 can be accurately installed on the base 3.

[0040] In order to drive the cover plate 5 to flip, in the embodiment, referring to Figure 1 The flipping assembly 52 includes a driving cylinder 53, a connecting head 54, a curved arm 55, and a rotating rod 56. The fixed end of the driving cylinder 53 is pivotally connected with the positioning plate 4, the driving end of the driving cylinder 53 is fixed with the connecting head 54, one end of the connecting head 54 is pivotally connected with the curved arm 55, the other end of the curved arm 55 is fixed at the end of the rotating rod 56, the rotating rod 56 is movably arranged on the positioning plate 4 through the bearing seat 57 and is parallel with the cover plate 5, and the rotating rod 56 is fixedly connected with the edge of the cover plate 5.

[0041] It can be understood that the driving cylinder 53 is used as a power source, the driving cylinder 53 is drivingly connected with the cover plate 5 through the connecting head 54, the curved arm 55, and a connecting rod. The connecting rod is limited by the bearing seat 57, the connecting rod is used as the center of flipping, the driving cylinder 53 is connected with the curved arm 55 through the connecting head 54, cooperates with the circumferential motion of the curved arm 55, the driving cylinder 53 drives the rotating rod 56 to rotate through the connecting head 54 and the curved curved arm 55, the cover plate 5 rotates with the rotating rod 56, and the opening and closing action of the cover plate 5 is realized.

[0042] In order to complete the assembly of the special-shaped heat dissipation fin 101 and the insulated gate bipolar transistor 201, in the embodiment, referring to Figure 1 The double-station workbench 1 is provided with a screw locking device 12 and a dispensing device 13 above. The screw locking device 12 fixes the insulated gate bipolar transistor 201 and the special-shaped heat dissipation fin 101 through a screw to form an assembly 301, and the dispensing device 13 dispenses heat-conducting silicone grease on the end face of the transverse part 103 of the special-shaped heat dissipation fin 101 through the positioning hole 51 of the cover plate 5.

[0043] It can be understood that the screw locking device 12 and the dispensing device 13 automatically perform the screw locking operation and the dispensing operation, while the feeding of the profiled heat sink 101 and the feeding of the insulated gate bipolar transistor 201 need to be completed by the external feeding mechanical arm (not shown in the figure). The feeding mechanical arm completes the feeding of the profiled heat sink 101 and the feeding of the insulated gate bipolar transistor 201 through the suction cup 74. The sequence of actions is that the feeding mechanical arm places nine profiled heat sinks 101 in the corresponding positioning holes 41, the driving cylinder 53 covers the cover plate 5 on the positioning plate 4, the cover plate 5 presses the nine profiled heat sinks 101, the positioning jig 2 is driven by the linear module 11 to move to the dispensing device 13, the nine profiled heat sinks 101 are dispensed with the heat-conducting silicone through the positioning holes 51, then the positioning jig 2 moves to the feeding mechanical arm, and the nine insulated gate bipolar transistors 201 are placed in the corresponding positioning holes 51. Finally, the positioning jig 2 moves to the screw locking device 12 to perform the screw locking operation, so as to firmly assemble the profiled heat sink 101 and the insulated gate bipolar transistor 201. In the whole process, the screw locking device 12 and the dispensing device 13 only need to complete the screw locking operation and the dispensing operation, and many structures can be realized, which will not be described here.

[0044] In order to complete the feeding of the assembled body 301, in the embodiment, referring to Figure 1 , the automatic screw locking machine for the profiled heat sink further comprises a feeding device 6. The feeding device 6 comprises a feeding mechanical arm 7 and a feeding chute 8. The feeding mechanical arm 7 reciprocates between the double-station workbench 1 and the feeding chute 8. The feeding mechanical arm 7 adsorbs the assembled body 301 through the suction cup 74 and carries it to the feeding chute. The assembled body 301 slides along the feeding chute 8 under the action of gravity. The feeding chute 8 comprises a first sliding rod 81, a second sliding rod 82 and a third sliding rod 83. The first sliding rod 81 and the second sliding rod 82 are located on the same side, and the third sliding rod 83 is located on the other side, forming a track 84 for the vertical part 102 of the profiled heat sink 101 to slide. The corner of the horizontal part 103 of the profiled heat sink 101 and the vertical part 102 is arranged on the first sliding rod 81. The second sliding rod 82 is in contact with the middle part of the vertical part 102. The third sliding rod 83 is in contact with the end of the vertical part 102 away from the horizontal part 103.

[0045] It needs to be further explained that, due to the shape of the profiled heat sink 101, it is difficult to position. If the conveying belt is directly used for transmission, the assembled body 301 is easy to fall and collide, and the pins 202 of the insulated gate bipolar transistor 201 are damaged. Therefore, the embodiment of the present application adopts the mode of the feeding chute 8 to transmit the assembled body 301 to the work area where the circuit board is installed.

[0046] Understandably, the unloading robot 7 uses two suction cups 74 to stably remove the assembled assembly 301 from the positioning fixture 2 and place it on the unloading slide 8. The two suction cups 74 avoid the insulated gate bipolar transistor 201 and contact the end face of the lateral portion 103 of the irregular heat-conducting sheet. The end face of the lateral portion 103 of the irregular heat-conducting sheet is relatively flat and can be well attracted by the suction cups 74. The unloading slide 8 provides stable support and guidance for the irregular heat sink 101 through the first slide rod 81, the second slide rod 82, and the third slide rod 83, so that the assembly 301 can slide smoothly along the slide and avoid falling, flipping, or shaking during the sliding process. The insulated gate bipolar transistor 201 will not collide with any structure, ensuring the safety of the insulated gate bipolar transistor 201.

[0047] It should be further explained that the unloading robot 7 includes an unloading cylinder 71, a lifting guide rail 72, a picking seat 73, and two suction cups 74 with external air sources. The unloading cylinder 71 and the lifting guide rail 72 are mounted on the same moving plate, which is mounted on a moving module (not shown in the attached figure). The unloading cylinder 71 is connected to the picking seat 73 by transmission. The two suction cups 74 are vertically mounted below the picking seat 73. The unloading cylinder 71 drives the picking seat 73 and the two suction cups 74 to move up and down along the lifting guide rail 72 to complete the picking and placing of the assembly 301.

[0048] To facilitate receiving the assembly 301, in this embodiment, reference is made to... Figure 1 The feeding chute 8 is provided with a connecting position 85. The third slide rod 83 does not extend to the connecting position 85. The end of the third slide rod 83 near the connecting position 85 is provided with an arc-shaped guide section 86. The arc-shaped guide section 86 forms an outwardly expanding opening 87 with the first slide rod 81 and the second slide rod 82.

[0049] Understandably, the third slide bar 83 does not extend to the docking position 85, allowing the assembly 301 to move directly into the docking position 85 from the side of the third slide bar 83 until the irregular heat sink 101 contacts the first slide bar 81 and the second slide bar 82. When the suction cup 74 of the unloading robot 7 releases the assembly 301, the assembly 301 can be directly hung on the first slide bar 81 and the second slide bar 82, and under the action of gravity, it enters the track 84 along the opening 87, ensuring that the assembly 301 can slide smoothly along the unloading slide 8.

[0050] The embodiment of the application integrates the screw locking and glue dispensing functions, realizes the automatic screw locking production operation of the special-shaped heat dissipation fin 101 and the insulated gate bipolar transistor 201, reduces the production cost, the positioning jig 2 accurately positions the special-shaped heat dissipation fin 101 and the insulated gate bipolar transistor 201 through the positioning holes 41 and the positioning holes 51 respectively, the longer vertical part 102 of the special-shaped heat dissipation fin 101 is accommodated through the overhang layer 31 and the type hole 43 between the positioning plate 4 and the base 3, so that the horizontal part 103 can be well positioned in the type groove 42, the special-shaped heat dissipation fin 101 can be accurately positioned with the insulated gate bipolar transistor 201, the automatic overturning of the cover plate 5 is realized through the overturning assembly 52, and the feeding and discharging are facilitated; the double-station workbench 1 can simultaneously perform different operations on two stations, improves the production efficiency, and the rapid discharging of the assembly body 301 is completed through the discharging device 6, and the production efficiency is further improved.

[0051] The above is not intended to limit the technical scope of the application in any way, and any modification, equivalent change and modification made to the above embodiments according to the technical essence of the application still belong to the scope of the technical scheme of the application.

Claims

1. An automatic screw locking machine for irregular heat sink, characterized in that, The double-station workbench is provided with a positioning jig, the positioning jig comprises a base, a positioning plate and a cover plate, the base is connected with the sliding table of the linear module, the positioning plate is arranged on the base, a plurality of positioning holes for placing the special-shaped heat dissipation fins are formed in the positioning plate, the positioning hole comprises a groove and a hole, the groove is matched with the horizontal part of the special-shaped heat dissipation fin, the hole is vertically communicated with the groove, the hole penetrates the positioning plate along the thickness direction and leads to the air layer between the positioning plate and the base, and the hole is matched with the vertical part of the special-shaped heat dissipation fin; the cover plate is movably arranged on the upper side of the positioning plate through a turnover assembly, a plurality of positioning holes are formed in the cover plate, the positioning hole is matched with the insulated gate bipolar transistor, when the cover plate covers the positioning plate, the cover plate is pressed on the horizontal part of the special-shaped heat dissipation fin, and the positioning hole is located directly above the corresponding positioning hole.

2. The automatic screw locking machine for irregular heat spreader according to claim 1, wherein The groove is provided with two avoiding grooves on the side away from the hole, and the avoiding grooves are matched with the fixing feet of the special-shaped heat dissipation fin.

3. The automatic screw locking machine for irregular heat sink according to claim 1, wherein The groove bottom of the groove is provided with an avoiding hole, and the avoiding hole is matched with the screw hole of the special-shaped heat dissipation fin.

4. The automatic screw locking machine for irregular heat sink according to claim 1, wherein The horizontal part and the vertical part of the special-shaped heat dissipation fin are perpendicular to each other to form an L-shaped special-shaped heat dissipation fin.

5. The automatic screw locking machine for irregular heat sink according to claim 1, wherein The positioning plate is arranged above the base through a pad, the pad is located at the corner of the positioning plate, and the base is provided with a stop edge outside the pad to position the pad and the positioning plate.

6. The automatic screw locking machine for irregular heat sink according to claim 1, wherein The turnover assembly comprises a driving cylinder, a connecting head, a curved arm, and a rotating rod, the fixed end of the driving cylinder is pivotally connected with the positioning plate, the driving end of the driving cylinder is fixed with the connecting head, one end of the connecting head is pivotally connected with the curved arm, the other end of the curved arm is fixed at the end of the rotating rod, the rotating rod is movably arranged on the positioning plate through a bearing seat and is parallel to the cover plate, and the edge of the rotating rod is fixedly connected with the cover plate.

7. The automatic screw locking machine for irregular heat sink according to claim 1, wherein The double-station workbench is provided with a screw locking device and a dispensing device, the screw locking device fixes the insulated gate bipolar transistor and the special-shaped heat dissipation fin through a screw to form an assembly, and the dispensing device dispenses heat-conducting silicone grease on the end face of the horizontal part of the special-shaped heat dissipation fin through the positioning hole of the cover plate.

8. The automatic screw locking machine for irregular heat sink according to claim 7, wherein The double-station workbench is provided with a screw locking device and a dispensing device, the screw locking device fixes the insulated gate bipolar transistor and the special-shaped heat dissipation fin through a screw to form an assembly, and the dispensing device dispenses heat-conducting silicone grease on the end face of the horizontal part of the special-shaped heat dissipation fin through the positioning hole of the cover plate.

9. The automatic screw locking machine for irregular heat sink according to claim 8, wherein The blanking device comprises a blanking manipulator and a blanking slide, the blanking manipulator reciprocally moves between the double-station workbench and the blanking slide, the blanking manipulator adsorbs the assembly through a suction cup and carries the assembly to the blanking slide, the assembly slides along the blanking slide under the action of gravity, the blanking slide comprises a first slide rod, a second slide rod and a third slide rod, the first slide rod and the second slide rod are located on the same side, the third slide rod is located on the other side to form a track for the vertical part of the special-shaped heat dissipation fin to slide, the corner of the horizontal part and the vertical part of the special-shaped heat dissipation fin is arranged on the first slide rod, the second slide rod is in contact with the middle part of the vertical part, and the third slide rod is in contact with the end of the vertical part away from the horizontal part. The blanking slide is provided with a connection position, the third slide rod does not extend to the connection position, one end of the third slide rod close to the connection position is provided with an arc-shaped guide section, and the arc-shaped guide section forms an opening expanding outward between the first slide rod and the second slide rod.

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