High-speed feeding and discharging system of high-density integrated circuit lead frame

Abstract

The invention relates to the technical field of lead frame carrying equipment, in particular to a high-speed feeding and discharging system for a high-density integrated circuit lead frame. A plurality of groups of material clamping mechanisms used for clamping the lead frame are arranged around the central axis of the turntable at intervals, the end parts of the supporting rods are provided with propping assemblies, the supporting rods of each group of material clamping mechanism are respectively and slidably mounted on the turntable, and a transverse pushing mechanism used for pushing the corresponding material clamping mechanism is arranged beside the turntable. The front face of the transverse pushing seat can be matched with the abutting roller to push the abutting assembly and the clamping mechanism to move synchronously with the conveying steel belt, and the abutting roller rolls along the front face of the transverse pushing seat. Compared with the prior art, the speed of the feeding and discharging mode is higher, and the increasingly-accelerated assembly line machining production requirement is met. When the sheet carrying mechanism is used, one sheet taking and placing module takes a lead frame, the other sheet taking and placing module places the lead frame, taking and placing are carried out one by one, and the working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of lead frame handling equipment, and in particular to a high-speed loading and unloading system for high-density integrated circuit lead frames. Background Art

[0002] As an important carrier in the semiconductor integrated chip packaging process, the lead frame is an important bridge connecting the internal circuit and the external lead. It is also a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit lead end of the chip and the external lead to form an electrical circuit. It acts as a bridge connecting to the external wires. Lead frames are required in most semiconductor integrated blocks and are an important basic material in the electronic information industry.

[0003] During the electroplating process, the lead frame needs to be loaded and unloaded. In the prior art, the lead frame is transported from a horizontal conveyor belt (the lead frame is in a horizontal position) to a conveyor steel belt (the lead frame is in an upright position) for loading, or vice versa. The conveyor steel belt can refer to the technology disclosed in Chinese patent documents such as CN202989310U, CN202989325U, CN116926647A, and CN116853783A. The conveyor steel belt is processed by clamping the upper side of the upright lead frame, and the elastic clip on the steel belt can be driven by external force to achieve loosening and clamping.

[0004] The transfer of the lead frame between the horizontal conveyor belt and the conveyor steel belt is achieved by a flipping mechanism. Therefore, the applicant has previously developed a flipping and transferring mechanism for clamping the integrated circuit lead frame as disclosed in the Chinese patent document with the announcement number CN219216591U, including a clamping pad in contact with one side of the lead frame, the clamping pad is equipped with a clamping assembly for clamping the edge of the lead frame, the clamping assembly includes a rotating part and a plurality of clamping claws, and the clamping pad is provided with a sliding part for mounting the rotating part and a sliding part for the sliding part. A sliding guide piece slides on the clamping pad to adjust the position of the clamping claws; when clamping, the clamping pad contacts the contact surface of the lead frame, and the rotating part of the clamping assembly drives the clamping claws to flip, and the ends of the clamping claws abut against the bottom panel edge of the lead frame, so that the lead frame fits to the bottom of the clamping pad. On the one hand, it will not contact the electroplating area on the bottom surface of the lead frame, which can prevent wear and damage. On the other hand, when clamping, the lead frame will not bend, which can reduce the damage to the lead frame caused by bending deformation, effectively protect the lead frame, and facilitate clamping and transportation.

[0005] In order to increase the loading and unloading speed, the applicant has developed a rotary loading device, which can quickly clamp and release the lead frame at different positions through 360° rotation of multiple clamping mechanisms. This technology has not yet been disclosed. The existing flip transfer mechanism can move synchronously with the steel belt to achieve non-stop transfer of the lead frame between the steel belt. Therefore, in order to maintain the need for non-stop operation, a follow-up non-stop structure is urgently needed for rotary loading. During the testing phase, it was found that among the multiple rotating clamping mechanisms, when the horizontal pushing mechanism pushes some clamping mechanisms to synchronize with the conveying steel belt, the horizontal pushing mechanism will interfere with the next rotating clamping mechanism when it is reset, thereby constraining the rotation speed of the multiple clamping mechanisms. Summary of the invention

[0006] In view of the above technical problems in the prior art, the present invention provides a high-speed loading and unloading system for high-density integrated circuit lead frames.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-speed loading and unloading system for high-density integrated circuit lead frames is provided, comprising a turntable with a central axis arranged transversely and a transposition drive module for driving the turntable to rotate step by step;

[0009] A plurality of groups of clamping mechanisms for clamping the lead frame are arranged separately around the central axis of the rotating disk, each group of the clamping mechanisms comprises a support rod and a clamping assembly for clamping / relaxing the lead frame which is foldably mounted on the support rod, the support rod is provided with a clamping driving module for driving the clamping assembly to clamp / relax; the support rod is provided with a limiter to limit the axial displacement of the clamping assembly relative to the support rod; each group of the clamping assembly comprises two rotating drums rotatably mounted on the support rod and arranged in parallel, and clips respectively fixed to the two rotating drums, the clamping driving module is used to drive the two rotating drums to rotate in opposite directions, so as to drive the clips of the two rotating drums to approach to clamp the lead frame or to move away from each other to release the lead frame;

[0010] The end of the support rod is provided with a resisting assembly, which includes a resisting support, a floating seat, a floating spring and a resisting roller. The resisting support is fixed to the support rod, the floating seat is slidably installed on the resisting support with a controlled stroke, the floating spring applies force to the floating seat so that the floating seat elastically protrudes relative to the resisting support, and the resisting roller is rotatably installed on the floating seat;

[0011] The support rods of each group of clamping mechanisms are slidably mounted on the turntable, and a transverse pushing mechanism for pushing the corresponding clamping mechanism is arranged on the side of the turntable, so that the support rod and the clamping assembly thereon can move synchronously with the conveying steel belt; the transverse pushing mechanism comprises a bracket, a follower rail and a follower seat, the follower rail is fixed to the bracket and arranged in parallel with the external conveying steel belt, the follower seat can be slidably mounted on the follower rail, and the bracket is provided with a follower driving module for driving the follower seat; the follower seat is provided with a transverse pushing seat, and the front of the transverse pushing seat can cooperate with the abutting roller to push the abutting assembly and the clamping mechanism to move synchronously with the external conveying steel belt; the back of the transverse pushing seat is provided with a yielding inclined surface, and the yielding inclined surface cooperates with the abutting roller to overcome the action force of the floating spring and make the floating seat retract relative to the abutting support to avoid;

[0012] It also includes a sheet moving mechanism, including a transfer module and two groups of sheet picking and placing modules for picking and placing lead frames, the transfer module includes a stand, a rotating frame and a transfer drive, the rotating frame is rotatably mounted on the stand, and the rotating axis of the rotating frame is arranged longitudinally; the two groups of sheet picking and placing modules are mounted on the rotating frame, and the two groups of sheet picking and placing modules are symmetrically arranged relative to the rotating axis of the rotating frame; the transfer drive is used to drive the rotating frame to rotate, so as to drive the two groups of sheet picking and placing modules to switch back and forth between two sheet picking and placing stations;

[0013] One of the wafer picking and placing stations is provided with a wafer carrier for receiving the lead frame transferred by the wafer picking and placing module. The wafer carrier is provided with a wafer pushing assembly for pushing the lead frame laterally. The clamping mechanism cooperates with the wafer carrier to clamp the lead frame thereon or place the lead frame thereon.

[0014] Specifically, each clamping piece includes a piece body and a plurality of parallelly arranged clamping strips extending integrally from the piece body, and the clamping strips of the clamping pieces on the two rotating drums are arranged one by one in alignment with each other; and / or: the bottom of the horizontal push seat is arc-shaped.

[0015] Specifically, the abutting assembly further comprises a guide bearing installed on the floating seat, and the abutting support is provided with a groove body for the guide bearing to slide.

[0016] Specifically, the turntable includes a first disk body, a middle rod and a second disk body, the first disk body and the second disk body are fixed to the two ends of the middle rod, the first disk body and the second disk body are provided with linear bearings aligned one by one, and the support rods are passed through the linear bearings matching the first disk body and the second disk body; the clamping mechanism is provided with a reset spring to keep each group of clamping mechanisms in such an initial position: the clamping assembly is biased toward the first disk body or the second disk body, and each support rod is aligned and passes out of the turntable with equal lengths, and after the force of the horizontal pushing mechanism on the support rod is released, the reset spring drives the support rod to return to the initial position; the reset spring is sleeved outside the support rod, and it is compressed to apply thrust to the clamping assembly.

[0017] Specifically, an extension rod is fixed at the rotation center of the first disk body, and the extension rod is connected to the first bearing seat; the transposition drive module includes a transposition drive motor, and the output shaft of the transposition drive motor is connected to the extension rod; and / or: an extension tube is fixed at the rotation center of the second disk body, and the extension tube is connected to the second bearing seat; the second bearing seat is connected to a pneumatic slip ring, and a through-tube hole is opened near the rotation center of the second disk body, and the pneumatic slip ring is connected to the opening and closing drive finger cylinder through a soft air pipe, and the soft air pipe passes through the extension tube and the through-tube hole.

[0018] Specifically, the number of opening and closing driving modules of each group of clamping mechanisms is more than two, the bearing seat is provided with a diverter seat, the diverter seat is provided with an air inlet manifold, an air outlet manifold, two or more air inlet diverter channels and two or more air outlet diverter channels, each air inlet diverter channel is connected to the air inlet manifold, and each air outlet diverter channel is connected to the air outlet manifold; the air outlet end of the pneumatic slip ring is connected to the air inlet end of the opening and closing driving finger cylinder of more than two groups of opening and closing driving modules via the air inlet manifold and the air inlet diverter channel; the air inlet end of the pneumatic slip ring is connected to the air outlet end of the opening and closing driving finger cylinder of more than two groups of opening and closing driving modules via the air outlet manifold and the air outlet diverter channel.

[0019] Specifically, the sheet picking and placing module includes a lifting seat, a longitudinal driving component installed on a rotating frame for driving the lifting seat to move up and down, a clip slide rail installed on the lifting seat, two sets of clip arms slidably installed on the clip slide rail, and a clip driving component for driving the two sets of clip arms to move closer / away; the longitudinal driving component is an electric cylinder fixed to the rotating frame, and its telescopic rod is connected to the lifting seat; the lifting seat is fixed with a lifting guide column, the rotating frame is provided with a longitudinal linear bearing, and the lifting guide column passes through the longitudinal linear bearing.

[0020] Specifically, the push sheet assembly includes a push sheet rod, a push sheet driving component for driving the push sheet rod to lift and lower and move laterally, and the film carrier is provided with a push sheet slot for the push sheet rod to pass through and move laterally; the push sheet driving component includes a push sheet base and a push sheet longitudinal movement seat, the push sheet longitudinal movement seat is installed on the push sheet base, the push sheet base is provided with a push sheet lifting cylinder for driving the push sheet longitudinal movement seat to move up and down, and the push sheet rod is installed on the push sheet longitudinal movement seat; the push sheet driving component also includes a push sheet power component for driving the push sheet base to move laterally.

[0021] Specifically, the pushing rods are arranged in two rows on the top of the pushing longitudinal movement seat, and a space for placing the lead frame is left between the two rows of pushing rods; the wafer carrier is provided with a splicing station, a transition station and a wafer discharge station arranged in sequence, the splicing station is close to the transfer module to receive the lead frame from the wafer placement module, the two rows of pushing rods move the lead frame of the splicing station to the transition station, and at the same time move the lead frame of the transition station to the wafer discharge station; the wafer discharge station is provided with a supporting body, which is a plurality of grids arranged at intervals.

[0022] Beneficial effects of the present invention:

[0023] The high-speed loading and unloading system of the high-density integrated circuit lead frame of the present invention, when in use, the turntable drives multiple groups of clamping mechanisms to rotate, and each group of clamping mechanisms on the turntable can be closed to clamp the lead frame or opened to release the lead frame at different positions independently. Moreover, when cooperating with the conveyor steel belt to take and release materials, the horizontal push mechanism can move the corresponding support rod and the clip thereon synchronously with the conveyor steel belt, so that the clip and the conveyor steel belt are relatively stationary, which is convenient for taking the lead frame from the conveyor steel belt or handing the lead frame to the conveyor steel belt without stopping the machine. Compared with the prior art, the loading and unloading method is faster, meeting the increasingly accelerated production line processing needs. Moreover, the front side of the horizontal push seat can cooperate with the top roller to push the top assembly and the clamping mechanism to move synchronously with the conveyor steel belt, while the turntable does not stop rotating, and the top roller rolls along the front side of the horizontal push seat. A yielding inclined surface is provided on the back of the horizontal push seat, which cooperates with the top roller. When the horizontal push seat is reset, the support rod pushed forward and the top assembly are also reset. The yielding inclined surface of the next set of clamping mechanism can overcome the force of the floating spring and make the floating seat retract relative to the top support to avoid it, so that the horizontal push seat is reset to the other side of the top assembly, thus avoiding interference and jamming of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a rotary high-speed material handling device for a high-density integrated circuit lead frame in an embodiment.

[0025] Figure 2 It is a partial structural schematic diagram of a rotary high-speed material handling device for a high-density integrated circuit lead frame in an embodiment.

[0026] Figure 3 Schematic diagram of the horizontal thrust mechanism in the embodiment.

[0027] Figure 4 It is a schematic diagram of the structure of the rotary high-speed material handling equipment in the embodiment after the horizontal pushing mechanism is hidden.

[0028] Figure 5 Schematic diagram of the structure of the disk in the embodiment.

[0029] Figure 6 Schematic diagram of the structure of the clamping mechanism in the embodiment.

[0030] Figure 7 Schematic diagram of a single rotating drum and its clips in the embodiment.

[0031] Figure 8 It is an exploded view of the clamping mechanism in the embodiment.

[0032] Fig. 9 It is a structural schematic diagram of a single opening and closing drive module in an embodiment.

[0033] Fig.10Schematic diagram of two rotating drums and their clamps in the embodiment.

[0034] Fig.11 It is a cross-sectional view of the diverter seat in the embodiment.

[0035] Fig.12 Schematic diagram of the abutment assembly in the embodiment.

[0036] Fig.13 It is an exploded view of the abutment assembly in the embodiment.

[0037] Fig.14 It is a schematic diagram of the horizontal push seat in the embodiment.

[0038] Fig.15 It is a structural schematic diagram of the film moving mechanism in the embodiment.

[0039] Fig.16 It is an exploded view of the film moving mechanism in the embodiment.

[0040] Fig.17 It is a schematic diagram of the structure of the transfer module in the embodiment.

[0041] Fig.18 Schematic diagram of the structure of the push piece assembly in the embodiment.

[0042] Fig.19 It is a schematic diagram of the structure of the wafer carrier in the embodiment.

[0043] Fig. 20 It is an exploded view of the wafer carrier in the embodiment.

[0044] Reference numerals:

[0045] The material clamping mechanism 1; the support rod 11, the first rod body 111, the second rod body 112; the rotating drum 12, the concave plane 121; the opening and closing driving module 13, the opening and closing driving finger cylinder 131, the connecting rod transmission group 132; the bearing seat 14, the limiter 15; the clamping piece 16, the piece body 161, the clamping strip 162, the protective cover 163; the diverter seat 17, the air inlet confluence 171, the air outlet confluence 172, the air inlet diverter 173, the air outlet diverter 174, and the return spring 18.

[0046] The turntable 21 , the first disk body 211 , the middle rod 212 , the second disk body 213 , the through-tube hole 2131 , the extension rod 214 , the first bearing seat 215 , the extension tube 216 , the second bearing seat 217 ; the transposition drive module 22 , the transposition drive motor 221 ; and the pneumatic slip ring 23 .

[0047] Conveyor steel belt H.

[0048] The horizontal pushing mechanism 3 , the bracket 31 , the follower rail 32 , the follower seat 33 , the follower driving module 34 , the horizontal pushing seat 35 , and the yielding inclined surface 351 .

[0049] The abutting assembly 400 , the abutting support 401 , the floating seat 402 , the floating spring 403 , the abutting roller 404 , and the guide bearing 405 .

[0050] Transfer module 50, vertical frame 501, vertical frame body 502, horizontal frame body 503, rotating frame 504, transfer driving member 505;

[0051] The sheet picking and placing module 51, the lifting seat 511, the longitudinal driving member 512, the sheet clamping slide rail 513, the sheet clamping arm 514, and the lifting guide column 515;

[0052] The wafer stage 52, the wafer pushing groove 521, the wafer joining station 522, the transition station 523, the wafer discharging station 524, the wafer supporting body 525, and the blocking sheet 526;

[0053] The push piece assembly 53 , the push piece rod 531 , the push piece base 532 , the push piece longitudinal displacement seat 533 , the push piece lifting cylinder 534 , and the push piece power member 535 . DETAILED DESCRIPTION

[0054] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0055] The high-speed loading and unloading system of the high-density integrated circuit lead frame of this embodiment is as follows: Figures 1 to 20 As shown, it includes a turntable 21 with a horizontally arranged central axis and a transposition drive module 22 for driving the turntable 21 to rotate step by step. A plurality of groups of clamping mechanisms 1 are arranged separately around the central axis of the turntable 21. There are a total of eight groups of clamping mechanisms 1 in the figure, and the adjacent two groups are arranged at 45 degrees.

[0056] The turntable 21 includes a first disk body 211, a middle rod 212 and a second disk body 213. The first disk body 211 and the second disk body 213 are fixed to the two ends of the middle rod 212. An extension rod 214 is fixed at the rotation center of the first disk body 211, and the extension rod 214 is connected to a first bearing seat 215. The transposition drive module 22 includes a transposition drive motor 221, and the output shaft of the transposition drive motor 221 is connected to the extension rod 214. An extension cylinder 216 is fixed at the rotation center of the second disk body 213, and the extension cylinder 216 is connected to a second bearing seat 217. When in use, the transposition drive motor 221 drives the extension rod 214, the first disk body 211, the second disk body 213, the middle rod 212 and the extension cylinder 216 to rotate as a whole, thereby driving multiple groups of clamping mechanisms 1 to switch in different positions in turn around 360° stepwise.

[0057] In this embodiment, each group of clamping mechanisms 1 includes a support rod 11 and two rotating drums 12. The support rod 11 includes a first rod body 111 and a second rod body 112 arranged in parallel and fixed to each other. The first plate body 211 and the second plate body 213 are provided with linear bearings aligned one by one. The first rod body 111 and the second rod body 112 can be slidably provided with linear bearings matching the first plate body 211 and the second plate body 213. The sliding direction of the first rod body 111 and the second rod body 112 is parallel to the movement direction of the conveyor steel belt. The two rotating drums 12 are rotatably mounted on the outside of the first rod body 111 and the second rod body 112 via bearings. The support rod 11 is provided with an opening and closing driving module 13 for driving the two rotating drums 12 to rotate in opposite directions. The support rod 11 is fixed with a bearing seat 14, and the opening and closing driving module 13 is mounted on the bearing seat 14. The support rod 11 is provided with a limiter 15 to limit the axial displacement of the rotating drum 12 relative to the support rod 11. It can be seen that the relative axial positions of the support rod 11, the bearing seat 14, and the rotating drum 12 are fixed. The two rotating drums 12 are respectively provided with outward clamping pieces 16. The rotating drum 12 and the clamping pieces 16 are combined as a clamping assembly. During use, when clamping materials, the opening and closing drive module 13 drives the two rotating drums 12 to rotate in opposite directions (one clockwise and the other counterclockwise), thereby driving the clamping pieces 16 on the two rotating drums 12 to approach and clamp the lead frame. When the clamped lead frame needs to be released, the reverse operation can be performed in the same way.

[0058] In this embodiment, the opening and closing driving module 13 includes an opening and closing driving finger cylinder 131 and a connecting rod transmission group 132. The cylinder barrel of the opening and closing driving finger cylinder 131 is fixed to the supporting seat 14. The connecting rod transmission group 132 includes multiple sections (three sections in this example) of rod sections hinged in sequence. The two output shafts of the opening and closing driving finger cylinder 131 are respectively provided with a connecting rod transmission group 132, and the head and tail of each group of connecting rod transmission groups 132 are respectively fixedly connected to the output shaft of the opening and closing driving finger cylinder 131 and the rotating drum 12. When in use, the stroke of the opening and closing driving finger cylinder 131 determines the rotation amplitude of the rotating drum 12 and the opening and closing degree of the clip 16.

[0059] In this embodiment, the number of opening and closing driving modules 13 of each group of clamping mechanism 1 is two groups, and they move synchronously with each other. In order to reduce the amount of cylinder pipelines, the bearing seat 14 is provided with a diverter seat 17, and the diverter seat 17 is provided with an air inlet manifold 171, an air outlet manifold 172, two air inlet manifolds 173 and two air outlet manifolds 174, each air inlet manifold 173 is connected to the air inlet manifold 171, and each air outlet manifold 174 is connected to the air outlet manifold 172. The air inlet ends of the two opening and closing driving finger cylinders 131 of the same group of clamping mechanism 1 are both connected to the air inlet manifold 173, and the air outlet ends are both connected to the air outlet manifold 172.

[0060] In this embodiment, the second bearing seat 217 is connected to a pneumatic slip ring 23, and a through-tube hole 2131 is opened near the rotation center of the second disk 213. Multiple through-tube holes 2131 are distributed around the rotation center of the second disk 213, and / or the through-tube holes 2131 are in the shape of long strips. The pneumatic slip ring is an existing outsourced component, which is used for rotating connection between two sections of air pipes without knotting. When in use, the pneumatic slip ring 23 is connected to an external air source, with the purpose of providing compressed air flow to the finger cylinder 131 for opening and closing. The specific connection method is that the air outlet of the pneumatic slip ring 23 is connected to the air inlet of the opening and closing driving finger cylinders 131 of the two opening and closing driving modules 13 through the soft air pipe, through the air inlet confluence channel 171 and each air inlet branch channel 173, so as to provide high-pressure airflow to drive the opening and closing driving finger cylinders 131 to open; the air inlet of the pneumatic slip ring 23 is connected to the air outlet of the opening and closing driving finger cylinders 131 of the two opening and closing driving modules 13 through the soft air pipe, through each air outlet branch channel 174 and the air outlet confluence channel 172, so that the gas of the opening and closing driving finger cylinders 131 refluxes to form a cycle. The soft air pipe passes through the extension tube 216 and the pipe hole 2131, and the air pipe layout is more convenient and simple.

[0061] In this embodiment, the clip 16 includes a sheet body 161 and a plurality of parallelly arranged clip strips 162 extending integrally from the sheet body 161. The clip strips 162 of the clips 16 on the two rotating drums 12 are arranged one by one in alignment with each other. Each clip strip 162 is covered with a soft protective cover 163 to prevent scratching the lead frame. The sheet body 161 is bent, and the sheet bodies 161 of the clips 16 of the two rotating drums 12 are bent close to each other, so that there is a larger contact area with the lead frame when clamping. An inner concave plane 121 is provided on the outer side of the rotating drum 12, and the sheet body 161 is fixedly attached to the inner concave plane 121.

[0062] In this embodiment, a horizontal pushing mechanism 3 is provided on the side of the turntable 21 for pushing the corresponding support rod 11. In this example, the support rod 11 at the upper position is pushed, and the opening of the clip 16 on the support rod 11 is aligned with the conveyor steel belt H, so that the support rod 11 and the clip 16 thereon move synchronously with the conveyor steel belt H. In this way, the clip 16 and the conveyor steel belt H are relatively stationary, which makes it easy to remove the lead frame from the conveyor steel belt H or pass the lead frame to the conveyor steel belt H.

[0063] In this embodiment, the clamping mechanism 1 is provided with a return spring 18, which is sleeved outside the support rod 11, and is compressed to apply a thrust to the bearing seat 14, so that each group of the clamping mechanism 1 is maintained in such an initial position: the clamping assembly is offset from the first disk body 211, and each support rod 11 is aligned with the same length and passes out of the turntable, that is, the length of each support rod 11 passing through the first disk body is the same, and the ends corresponding to the horizontal push seat 35 are aligned in the longitudinal direction. After the force of the horizontal push mechanism 3 on the support rod 11 is released, the return spring 18 drives the support rod 11 to return to the initial position.

[0064] A push-up assembly 400 is provided at the end of the support rod 11, and the push-up assembly 400 includes a push-up support 401, a floating seat 402, a floating spring 403 and a push-up roller 404. The push-up support 401 is fixed to the end of the support rod 11, and the floating seat 402 is slidably installed on the push-up support 401 with a controlled stroke. The floating spring 403 applies force to the floating seat 402 so that the floating seat 402 elastically protrudes relative to the push-up support 401, and the push-up roller 404 is rotatably installed on the floating seat 402.

[0065] The horizontal push mechanism 3 includes a bracket 31, a follower rail 32 and a follower seat 33. The follower rail 32 is fixed to the bracket 31 and parallel to the conveyor steel belt H. The follower seat 33 is slidably installed on the follower rail 32. The bracket 31 is provided with a follower drive module 34 for driving the follower seat 33; the follower seat 33 is provided with a horizontal push seat 35. When in use, the front of the horizontal push seat 35 can cooperate with the abutting roller 404 to push the abutting assembly 400 and the clamping mechanism 1 to move synchronously with the conveyor steel belt H. At the same time, the turntable 21 does not stop rotating, and the abutting roller 404 rolls along the front of the horizontal push seat 35. The back of the horizontal push seat 35 is provided with a yielding inclined surface 351, which cooperates with the top roller 404. When the horizontal push seat 35 is reset, the support rod 11 pushed forward and the top assembly 400 are also reset. The yielding inclined surface 351 of the next group of clamping mechanisms 1 can overcome the force of the floating spring 403 and make the floating seat 402 retract relative to the top support 401 to avoid, so that the horizontal push seat 35 is reset to the other side of the top assembly 400, so as to achieve the mechanism without collision and jamming.

[0066] In this embodiment, the bottom of the horizontal push seat 35 is arc-shaped, and the arc is basically consistent with the rotating disk 21. The top assembly 400 also includes a guide bearing 405 installed on the floating seat 402, and the top support 401 is provided with a groove for the guide bearing 405 to slide, so as to realize the directional reciprocating motion of the floating seat 402.

[0067] In this embodiment, a wafer transfer mechanism is further included, which is used to transfer the lead frame in the surrounding magazine to the clamping mechanism 1 for loading, or to receive the lead frame in the clamping mechanism 1 and transfer it to the magazine for unloading. It includes a transfer module 50 and two pick-and-place wafer modules 51 for picking and placing the lead frame. The transfer module 50 includes a vertical frame 501, a rotating frame 504, and a transfer driving member 505. The rotating frame 504 is rotatably installed on the vertical frame 501, and the rotation axis of the rotating frame 504 is longitudinally arranged. The two pick-and-place wafer modules 51 are installed on the rotating frame 504, and the two pick-and-place wafer modules 51 are symmetrically arranged with respect to the rotation axis of the rotating frame 504. The transfer driving member 505 (a motor is used) is used to drive the rotating frame 504 to rotate, so as to drive the two pick-and-place wafer modules 51 to reciprocally switch between two pick-and-place positions. In this example, it rotates 180° to reciprocally switch positions. The vertical frame 501 includes a vertical frame body 502 in an inverted "U" shape and a horizontal frame body 503. The two ends of the horizontal frame body 503 are connected to the upper ends of the two vertical frame bodies 502. The two pick-and-place wafer modules 51 are arranged on both sides below the horizontal frame body 503.

[0068] In this embodiment, the pick-and-place wafer module 51 includes a lifting seat 511, a longitudinal movement driving member 512 installed on the rotating frame 504 for driving the lifting seat 511 to move up and down, a wafer clamping slide rail 513 installed on the lifting seat 511, two sets of wafer clamping arms 514 slidably installed on the wafer clamping slide rail 513, and a wafer clamping driving member (a cylinder can be used) for driving the two sets of wafer clamping arms 514 to approach / separate from each other. The longitudinal movement driving member 512 is an electric cylinder fixed to the rotating frame 504, and its telescopic rod is connected to the lifting seat 511; the lifting seat 511 is fixed with a lifting guide post 515, and the rotating frame 504 is provided with a longitudinally arranged linear bearing, and the lifting guide post 515 passes through the longitudinally arranged linear bearing.

[0069] At one of the pick-and-place positions, a wafer carrier 52 is provided for receiving the lead frame transferred by the pick-and-place wafer module 51. The wafer carrier 52 is provided with a wafer pushing assembly 53 for laterally pushing the lead frame. The wafer pushing assembly 53 includes a wafer pushing rod 531 and a wafer pushing driving member for driving the wafer pushing rod 531 to move up and down and laterally. The wafer carrier 52 is provided with a wafer pushing slot 521 for the wafer pushing rod 531 to pass through and move laterally. The wafer pushing driving member includes a wafer pushing base 532 and a wafer pushing longitudinal movement seat 533. The wafer pushing longitudinal movement seat 533 is installed on the wafer pushing base 532. The wafer pushing base 532 is provided with a wafer pushing lifting cylinder 534 for driving the wafer pushing longitudinal movement seat 533 to move up and down. The wafer pushing rod 531 is installed on the wafer pushing longitudinal movement seat 533; the wafer pushing driving member further includes a wafer pushing power member 535 for driving the wafer pushing base 532 to move laterally.

[0070] Specifically, the push rods 531 are arranged in two rows on the top of the push longitudinal displacement seat 533, and there is a space for the lead frame to be placed between the two rows of push rods 531. The wafer carrier 52 is provided with a wafer splicing station 522, a transition station 523 and a wafer discharging station 524 arranged in sequence. The wafer splicing station 522 is close to the transfer module 50 to receive the lead frame from the wafer loading and unloading module 51. The two rows of push rods 531 move the lead frame of the wafer splicing station 522 to the transition station 523, and at the same time move the lead frame of the transition station 523 to the wafer discharging station 524. That is, the two rows of push rods 531 are inserted into both sides of the lead frame at the wafer splicing station 522, one row of push rods 531 pushes the lead frame of the wafer splicing station 522 to the transition station 523, and the other row of push rods 531 pushes the lead frame of the transition station 523 to the wafer discharging station 524.

[0071] In this embodiment, the sheet discharging station 524 is provided with a sheet supporting body 525, which is a plurality of grids arranged at intervals. The grids are staggered with the clamping strips 162 of the clamping piece 16, so as to facilitate the clamping piece 16 of the clamping mechanism 1 to clamp the lead frame and move it away, or to facilitate the putting down of the lead frame.

[0072] In this embodiment, the wafer carrier 52 is provided with two baffles 526 for guiding and limiting the two sides of the lead frame, and the distance between the two baffles 526 can be adjusted to facilitate the guidance and limiting of lead frames of different specifications. Specifically, the baffle 526 is provided with a rod body, and the position of the baffle 526 is adjusted by tightening the rod body with a screw.

[0073] In the description of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

Claims

1. High-speed loading and unloading system for high-density integrated circuit lead frames, characterized by: It includes a turntable with a central axis arranged transversely and a transposition drive module for driving the turntable to rotate step by step; A plurality of groups of clamping mechanisms for clamping the lead frame are arranged separately around the central axis of the rotating disk, each group of the clamping mechanisms comprises a support rod and a clamping assembly for clamping / relaxing the lead frame which is foldably mounted on the support rod, the support rod is provided with a clamping driving module for driving the clamping assembly to clamp / relax; the support rod is provided with a limiter to limit the axial displacement of the clamping assembly relative to the support rod; each group of the clamping assembly comprises two rotating drums rotatably mounted on the support rod and arranged in parallel, and clips respectively fixed to the two rotating drums, the clamping driving module is used to drive the two rotating drums to rotate in opposite directions, so as to drive the clips of the two rotating drums to approach to clamp the lead frame or to move away from each other to release the lead frame; The end of the support rod is provided with a resisting assembly, which includes a resisting support, a floating seat, a floating spring and a resisting roller. The resisting support is fixed to the support rod, the floating seat is slidably installed on the resisting support with a controlled stroke, the floating spring applies force to the floating seat so that the floating seat elastically protrudes relative to the resisting support, and the resisting roller is rotatably installed on the floating seat; The support rods of each group of clamping mechanisms are slidably mounted on the turntable, and a transverse pushing mechanism for pushing the corresponding clamping mechanism is arranged on the side of the turntable, so that the support rod and the clamping assembly thereon can move synchronously with the conveying steel belt; the transverse pushing mechanism comprises a bracket, a follower rail and a follower seat, the follower rail is fixed to the bracket and arranged in parallel with the external conveying steel belt, the follower seat can be slidably mounted on the follower rail, and the bracket is provided with a follower driving module for driving the follower seat; the follower seat is provided with a transverse pushing seat, and the front of the transverse pushing seat can cooperate with the abutting roller to push the abutting assembly and the clamping mechanism to move synchronously with the external conveying steel belt; the back of the transverse pushing seat is provided with a yielding inclined surface, and the yielding inclined surface cooperates with the abutting roller to overcome the action force of the floating spring and make the floating seat retract relative to the abutting support to avoid; It also includes a sheet moving mechanism, including a transfer module and two groups of sheet picking and placing modules for picking and placing lead frames, the transfer module includes a stand, a rotating frame and a transfer drive, the rotating frame is rotatably mounted on the stand, and the rotating axis of the rotating frame is arranged longitudinally; the two groups of sheet picking and placing modules are mounted on the rotating frame, and the two groups of sheet picking and placing modules are symmetrically arranged relative to the rotating axis of the rotating frame; the transfer drive is used to drive the rotating frame to rotate, so as to drive the two groups of sheet picking and placing modules to switch back and forth between two sheet picking and placing stations; One of the wafer picking and placing stations is provided with a wafer carrier for receiving the lead frame transferred by the wafer picking and placing module. The wafer carrier is provided with a wafer pushing assembly for pushing the lead frame laterally. The clamping mechanism cooperates with the wafer carrier to clamp the lead frame thereon or place the lead frame thereon.

2. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1 is characterized in that: Each clamping sheet comprises a sheet body and a plurality of clamping strips which are integrally extended from the sheet body and arranged in parallel. The clamping strips of the clamping sheets on the two rotating drums are arranged in alignment with each other.

3. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1 is characterized in that: The bottom of the horizontal push seat is arc-shaped.

4. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1, characterized in that: The abutting assembly also includes a guide bearing installed on the floating seat, and the abutting support is provided with a groove body for the guide bearing to slide.

5. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1 is characterized in that: the turntable includes a first disk body, a middle rod and a second disk body, the first disk body and the second disk body are fixed to the two ends of the middle rod, the first disk body and the second disk body are provided with linear bearings aligned one by one, and the support rods are passed through the linear bearings matching the first disk body and the second disk body; the clamping mechanism is provided with a reset spring to keep each group of clamping mechanisms in such an initial position: the clamping assembly is biased toward the first disk body or the second disk body, and each support rod is aligned and passes out of the turntable with equal lengths, and after the force of the horizontal pushing mechanism on the support rod is released, the reset spring drives the support rod to return to the initial position; the reset spring is sleeved outside the support rod, and it is compressed to apply thrust to the clamping assembly.

6. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 5, characterized in that: An extension rod is fixed at the rotation center of the first disk body, and the extension rod is connected to the first bearing seat; the transposition drive module includes a transposition drive motor, and the output shaft of the transposition drive motor is connected to the extension rod; and / or: an extension tube is fixed at the rotation center of the second disk body, and the extension tube is connected to the second bearing seat; the second bearing seat is connected to a pneumatic slip ring, and a through-tube hole is opened near the rotation center of the second disk body, and the pneumatic slip ring is connected to the opening and closing drive finger cylinder through a soft air pipe, and the soft air pipe passes through the extension tube and the through-tube hole.

7. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 6, characterized in that: The number of opening and closing drive modules of each group of clamping mechanism is more than two groups, the bearing seat is provided with a diverter seat, the diverter seat is provided with an air inlet manifold, an air outlet manifold, two or more air inlet diverter channels and two or more air outlet diverter channels, each air inlet diverter channel is connected to the air inlet manifold, and each air outlet diverter channel is connected to the air outlet manifold; the air outlet end of the pneumatic slip ring is connected to the air inlet end of the opening and closing drive finger cylinder of more than two groups of opening and closing drive modules via the air inlet manifold and the air inlet diverter channel; the air inlet end of the pneumatic slip ring is connected to the air outlet end of the opening and closing drive finger cylinder of more than two groups of opening and closing drive modules via the air outlet manifold and the air outlet diverter channel.

8. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1, characterized in that: The sheet picking and placing module includes a lifting seat, a longitudinal driving component installed on a rotating frame for driving the lifting seat to move up and down, a clip slide rail installed on the lifting seat, two sets of clip arms slidably installed on the clip slide rail, and a clip driving component for driving the two sets of clip arms to move closer / away; the longitudinal driving component is an electric cylinder fixed to the rotating frame, and its telescopic rod is connected to the lifting seat; the lifting seat is fixed with a lifting guide column, the rotating frame is provided with a longitudinal linear bearing, and the lifting guide column passes through the longitudinal linear bearing.

9. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 1, characterized in that: The push-piece assembly includes a push-piece rod, a push-piece driving component for driving the push-piece rod to lift and lower and move laterally, and the film carrier is provided with a push-piece slot for the push-piece rod to pass through and move laterally; the push-piece driving component includes a push-piece base and a push-piece longitudinal movement seat, the push-piece longitudinal movement seat is installed on the push-piece base, the push-piece base is provided with a push-piece lifting cylinder for driving the push-piece longitudinal movement seat to move up and down, and the push-piece rod is installed on the push-piece longitudinal movement seat; the push-piece driving component also includes a push-piece power component for driving the push-piece base to move laterally.

10. The high-speed loading and unloading system for high-density integrated circuit lead frames according to claim 9, characterized in that: The sheet pushing rods are arranged in two rows on the top of the sheet pushing longitudinal shifting seat, and a space for placing the lead frame is left between the two rows of sheet pushing rods; the wafer carrier is provided with a sheet splicing station, a transition station and a sheet discharging station arranged in sequence, the sheet splicing station is close to the transfer module to receive the lead frame from the sheet placing and picking module, the two rows of sheet pushing rods move the lead frame of the sheet splicing station to the transition station, and at the same time move the lead frame of the transition station to the sheet discharging station; the sheet discharging station is provided with a sheet supporting body, which is a plurality of grids arranged at intervals.

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