Rotary transfer assembly of high-density integrated circuit lead frames

Abstract

The present invention relates to the technical field of lead frame handling equipment, and more specifically to the rotary transfer assembly of high-density integrated circuit lead frames, comprising a turntable and a transposition drive module. Multiple groups of clamping mechanisms for clamping lead frames are arranged separately around the central axis of the turntable, and support rods are provided with abutment assemblies at the ends. The support rods of each group of clamping mechanisms are slidably mounted on the turntable. A transverse pushing mechanism for pushing the corresponding clamping mechanism is provided on the side of the turntable. During use, the front of the transverse pushing seat can cooperate with the abutment roller to push the abutment assembly and the clamping mechanism to move synchronously with the conveyor belt, and the abutment roller rolls along the front of the transverse pushing seat. A yielding slope on the back of the transverse pushing seat cooperates with the abutment roller. When the transverse pushing seat is reset, the yielding slope of the next group of clamping mechanisms can overcome the force of the floating spring and cause the floating seat to retract relative to the abutment support. Compared with the existing technology, the loading and unloading method is faster, meeting the increasingly faster production needs of assembly line processing.

Description

Technical Field

[0001] The invention relates to the technical field of lead frame handling equipment, in particular to rotary material transfer assembly of 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, lead frames need to be loaded and unloaded. In the prior art, lead frames are transported from a horizontal conveyor belt (laying horizontally) to a steel conveyor belt (standing upright) for loading, or vice versa. The steel conveyor belt, as disclosed in Chinese patents such as CN202989310U, CN202989325U, CN116926647A, and CN116853783A, transfers lead frames by clamping the upper side of the upright lead frame. External force is used to activate elastic clips on the steel conveyor belt to release and clamp the lead frame.

[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 publication number CN219216591U, which includes 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, 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 end thereof rests against the edge of the bottom panel 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 damage to the lead frame caused by bending deformation, effectively protect the lead frame, and facilitate clamping and transportation.

[0005] To increase the speed of loading and unloading, the applicant has developed a rotary loading device that uses multiple clamping mechanisms to rotate 360° to quickly clamp and release the lead frame at different positions. This technology has not yet been disclosed. The existing flip transfer mechanism can move synchronously with the steel belt, realizing the transfer of lead frames to and from the steel belt without stopping. Therefore, in order to maintain the requirement of non-stop operation, the rotary loading urgently needs to be designed with a follow-up non-stop structure. During the testing phase, it was found that when the horizontal push mechanism pushes some clamping mechanisms to synchronize with the conveyor steel belt, the horizontal push mechanism will interfere with the next rotating clamping mechanism when it resets, which restricts 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 rotary material transfer assembly for a high-density integrated circuit lead frame.

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

[0008] Provided is a rotary transfer assembly for high-density integrated circuit lead frames, including a device for removing lead frames from a conveyor belt or transferring lead frames to a conveyor belt, characterized by comprising a turntable with a transversely arranged central axis and a transposition drive module for driving the turntable to rotate step by step;

[0009] A plurality of clamping mechanisms for clamping the lead frame are arranged separately around the central axis of the turntable. Each clamping mechanism includes a support rod and a clamping assembly operatively mounted on the support rod for clamping / relaxing the lead frame. The support rod is provided with an opening / closing drive module for driving the clamping assembly to clamp / relax. The support rod is provided with a limit member to limit the axial displacement of the clamping assembly relative to the support rod. Each clamping assembly includes two rotating drums rotatably mounted on the support rod and arranged in parallel, and clips respectively fixed to the two rotating drums. The opening / closing drive module is used to drive the two rotating drums to rotate in opposite directions, thereby driving the clips of the two rotating drums to move closer to clamp the lead frame or 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, and the floating seat is slidably mounted 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. The resisting roller is rotatably mounted 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 provided on the side of the turntable, so that the support rod and the clamping assembly thereon can move synchronously with the conveyor belt; the transverse pushing mechanism includes a bracket, a follower rail and a follower seat, the follower rail is fixed to the bracket and parallel to the external conveyor 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 conveyor belt; the back of the transverse pushing seat is provided with a yielding inclined surface, which cooperates with the abutting roller to overcome the action of the floating spring and make the floating seat retract relative to the abutting support.

[0012] As a further optional solution, each clip includes a clip body and a plurality of parallelly arranged clip strips extending integrally from the clip body, and the clip strips of the clips on the two rotating drums are arranged in alignment with each other.

[0013] As a further optional solution, the bottom of the transverse push seat is arc-shaped.

[0014] As a further optional solution, the abutting assembly further includes a guide bearing mounted on the floating seat, and the abutting support is provided with a groove for the guide bearing to slide.

[0015] As a further optional solution, 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 one-to-one aligned linear bearings, and the support rod is passed through the linear bearings of the first disk body and the second disk body.

[0016] As a further optional option, 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 the support rods are aligned with equal lengths and pass through the turntable. After the force of the horizontal pushing mechanism on the support rods is released, the reset spring drives the support rods back to the initial position.

[0017] As a further optional solution, the return spring is sleeved outside the support rod, and the return spring is compressed to apply a pushing force to the clamping assembly.

[0018] As a further optional solution, 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.

[0019] As a further optional solution, 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 pipe hole is opened near the rotation center of the second disk body. The pneumatic slip ring and the opening and closing drive finger cylinder are connected by a soft air tube, and the soft air tube passes through the extension tube and the pipe hole. As a further optional solution, the number of opening and closing drive modules in each group of clamping mechanisms is more than two, the supporting 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 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.

[0020] Beneficial effects of the present invention:

[0021] The present invention relates to a rotary material transfer assembly system for high-density integrated circuit lead frames. During use, a turntable drives multiple groups of clamping mechanisms to rotate. Each group of clamping mechanisms on the turntable can independently close to clamp the lead frame or independently open to release the lead frame at different positions. Furthermore, when working with a conveyor belt to load and unload materials, a horizontal push mechanism can synchronously move the corresponding support rod and the clip thereon with the conveyor belt. This allows the clip and the conveyor belt to remain relatively stationary, facilitating the removal of lead frames from the conveyor belt or their transfer to the conveyor belt without stopping the machine. Compared to the prior art, this method of loading and unloading is faster, meeting the demands of increasingly faster production line processing. Furthermore, the front face of the horizontal push seat can cooperate with abutting rollers to push the abutting assembly and the clamping mechanism to move synchronously with the conveyor belt. Meanwhile, the turntable continues to rotate, and the abutting rollers roll along the front face of the horizontal push seat. A yield slope 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 and the top assembly pushed forward are also reset. The yield slope of the next set of clamping mechanisms 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

[0022] Figure 1 Schematic diagram of the structure of the rotary high-speed material handling equipment for high-density integrated circuit lead frames in the embodiment.

[0023] Figure 2 Schematic diagram of the horizontal thrust mechanism in the embodiment.

[0024] Figure 3 This is a structural diagram of the rotary high-speed material handling equipment in the embodiment after the horizontal pushing mechanism is hidden.

[0025] Figure 4 Schematic diagram of the structure of the disc in the embodiment.

[0026] Figure 5 Schematic diagram of the structure of the clamping mechanism in the embodiment.

[0027] Figure 6 Schematic diagram of a single drum and its clips in an embodiment.

[0028] Figure 7 2 is an exploded view of the clamping mechanism in the embodiment.

[0029] Figure 8 Schematic diagram of the structure of a single opening and closing drive module in the embodiment.

[0030] Figure 9 Schematic diagram of two rotating drums and their clips in the embodiment.

[0031] Figure 10 2 is a cross-sectional view of the diverter seat in the embodiment.

[0032] Figure 11 Schematic diagram of the abutment assembly in the embodiment.

[0033] Figure 12 2 is an exploded view of the abutment assembly in the embodiment.

[0034] Figure 13 Schematic diagram of the transverse push seat in the embodiment.

[0035] Reference numerals:

[0036] 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 drive module 13, the opening and closing drive finger cylinder 131, the connecting rod transmission group 132; the supporting seat 14, the limit member 15; the clamping piece 16, the piece body 161, the clamping strip 162, the protective cover 163; the diverter seat 17, the air inlet manifold 171, the air outlet manifold 172, the air inlet manifold 173, the air outlet manifold 174, and the return spring 18.

[0037] Rotating disc 21 , first disc body 211 , middle rod 212 , second disc body 213 , through-hole 2131 , extension rod 214 , first bearing seat 215 , extension tube 216 , second bearing seat 217 ; transposition drive module 22 , transposition drive motor 221 ; pneumatic slip ring 23 .

[0038] Conveyor steel belt H.

[0039] The horizontal pushing mechanism 3 , the bracket 31 , the follower rail 32 , the follower seat 33 , the follower drive module 34 , the horizontal pushing seat 35 , and the yielding inclined surface 351 .

[0040] The supporting assembly 400 , the supporting support 401 , the floating seat 402 , the floating spring 403 , the supporting roller 404 , and the guide bearing 405 . DETAILED DESCRIPTION

[0041] 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.

[0042] The rotary transfer assembly of the high-density integrated circuit lead frame of this embodiment is as follows: Figures 1 to 13 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. There are multiple groups of clamping mechanisms 1 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°.

[0043] The turntable 21 includes a first disk body 211, a center 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 center 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. During use, the transposition drive motor 221 drives the extension rod 214, the first disk body 211, the second disk body 213, the center rod 212, and the extension cylinder 216 to rotate as a whole, thereby driving multiple groups of clamping mechanisms 1 to switch to different positions in sequence around 360° stepwise.

[0044] In this embodiment, each set 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 disk body 211 and the second disk body 213 are provided with linear bearings aligned one by one. The first rod body 111 and the second rod body 112 are slidably provided with linear bearings that match the first disk body 211 and the second disk 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 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 drive 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 drive module 13 is mounted on the bearing seat 14. The support rod 11 is provided with a limiter 15 to restrict the axial displacement of the 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 drum 12 are fixed. The two drums 12 are each provided with an outward-facing clip 16. The drums 12 and the clips 16 together serve as a clamping assembly. During use, when clamping, the opening and closing drive module 13 drives the two drums 12 to rotate in opposite directions (one clockwise and the other counterclockwise), thereby driving the clips 16 on the two drums 12 to approach and clamp the lead frame. To release the clamped lead frame, the reverse operation can be performed.

[0045] In this embodiment, the opening and closing drive module 13 includes an opening and closing drive finger cylinder 131 and a connecting rod transmission group 132. The cylinder barrel of the opening and closing drive 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 drive 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 drive finger cylinder 131 and the rotating drum 12. When in use, the stroke of the opening and closing drive finger cylinder 131 determines the rotation amplitude of the rotating drum 12 and the opening and closing degree of the clip 16.

[0046] In this embodiment, each clamping mechanism 1 comprises two opening and closing drive modules 13, which move synchronously. To reduce the use of cylinder pipes, the support base 14 is provided with a diverter seat 17. The diverter seat 17 is provided with an inlet manifold 171, an outlet manifold 172, two inlet manifolds 173, and two outlet manifolds 174. Each inlet manifold 173 connects to the inlet manifold 171, and each outlet manifold 174 connects to the outlet manifold 172. The inlet ends of the two opening and closing drive finger cylinders 131 in the same clamping mechanism 1 are both connected to the inlet manifold 173, and the outlet ends are both connected to the outlet manifold 172.

[0047] In this embodiment, the second bearing block 217 is connected to a pneumatic slip ring 23. A perforation 2131 is formed near the rotation center of the second disk 213. Multiple perforations 2131 are distributed around the rotation center of the second disk 213 and / or are elongated. The pneumatic slip ring is a pre-existing, externally purchased component that provides a tangled, rotatable connection between two sections of air pipe. During operation, the pneumatic slip ring 23 connects to an external air source to provide compressed air to the finger actuator cylinder 131. Specifically, the air supply from the pneumatic slip ring 23 is connected to the air supply of the two opening and closing drive finger cylinders 131 via a flexible air pipe, sequentially through the air inlet confluence channel 171 and the air inlet branch channels 173, providing high-pressure airflow to drive the opening of the opening and closing drive finger cylinders 131. Furthermore, the air supply from the pneumatic slip ring 23 is connected to the air supply of the two opening and closing drive finger cylinders 131 via a flexible air pipe, sequentially through the air outlet branch channels 174 and the air outlet confluence channel 172, allowing the air from the opening and closing drive finger cylinders 131 to circulate. The flexible air pipe passes through the extension tube 216 and the pipe hole 2131, making the air supply arrangement more convenient and simple.

[0048] In this embodiment, the clip 16 comprises a main body 161 and multiple parallel, juxtaposed strips 162 extending from the main body 161. The strips 162 of the clips 16 on the two rotating drums 12 are aligned with each other. Each strip 162 is covered with a soft protective cover 163 to prevent scratching the lead frame. The main body 161 is curved, and the main bodies 161 of the clips 16 on the two rotating drums 12 are bent close to each other, ensuring a larger contact area with the lead frame during clamping. The outer side of the rotating drum 12 is provided with an inwardly concave surface 121, with which the main body 161 is fixedly engaged.

[0049] 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 facilitates the removal of the lead frame from the conveyor steel belt H or the handing of the lead frame to the conveyor steel belt H.

[0050] In this embodiment, the clamping mechanism 1 is equipped with a return spring 18, which is sleeved outside the support rods 11. When compressed, the return spring 18 applies a thrust to the support seat 14, thereby maintaining each set of clamping mechanisms 1 in the following initial position: the clamping assembly is offset from the first plate 211, and the support rods 11 extend out of the turntable with equal lengths. In other words, the lengths of the support rods 11 extending out of the first plate are the same, and their ends corresponding to the transverse push seats 35 are longitudinally aligned. After the force applied by the transverse push mechanism 3 to the support rods 11 is released, the return spring 18 drives the support rods 11 back to their initial position.

[0051] 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.

[0052] The transverse pushing mechanism 3 comprises 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 belt H. The follower seat 33 is slidably mounted on the follower rail 32. The bracket 31 is equipped with a follower drive module 34 for driving the follower seat 33. The follower seat 33 is equipped with a transverse pushing seat 35. During operation, the front face of the transverse pushing seat 35 engages with abutting rollers 404 to push the abutting assembly 400 and the clamping mechanism 1 to move synchronously with the conveyor belt H. At the same time, the turntable 21 continues to rotate, and the abutting rollers 404 roll along the front face of the transverse pushing seat 35. The back of the horizontal push seat 35 is provided with a yield slope 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 yield slope 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 it, so that the horizontal push seat 35 is reset to the other side of the top assembly 400, so that the mechanism does not collide and get stuck.

[0053] In this embodiment, the bottom of the horizontal push seat 35 is arc-shaped, and the curvature is substantially consistent with the turntable 21. The push assembly 400 further includes a guide bearing 405 mounted on the floating seat 402. The push support 401 is provided with a groove for the guide bearing 405 to slide, thereby achieving directional reciprocating motion of the floating seat 402.

[0054] 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0055] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to connections directly or indirectly through an intermediary, or they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

Claims

1. Rotary transfer assembly of high-density integrated circuit lead frames, used to remove lead frames from conveyor belts or transfer lead frames to conveyor belts, 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 clamping mechanisms for clamping the lead frame are arranged separately around the central axis of the turntable. Each clamping mechanism includes a support rod and a clamping assembly operatively mounted on the support rod for clamping / relaxing the lead frame. The support rod is provided with an opening / closing drive module for driving the clamping assembly to clamp / relax. The support rod is provided with a limit member to limit the axial displacement of the clamping assembly relative to the support rod. Each clamping assembly includes two rotating drums rotatably mounted on the support rod and arranged in parallel, and clips respectively fixed to the two rotating drums. The opening / closing drive module is used to drive the two rotating drums to rotate in opposite directions, thereby driving the clips of the two rotating drums to move closer to clamp the lead frame or 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, and the floating seat is slidably mounted 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. The resisting roller is rotatably mounted 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 provided on the side of the turntable, so that the support rod and the clamping assembly thereon can move synchronously with the conveyor belt; the transverse pushing mechanism includes a bracket, a follower rail and a follower seat, the follower rail is fixed to the bracket and parallel to the external conveyor 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 conveyor belt; the back of the transverse pushing seat is provided with a yielding inclined surface, which cooperates with the abutting roller to overcome the action of the floating spring and make the floating seat retract relative to the abutting support.

2. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 1, characterized in that: Each clip comprises a clip body and a plurality of clip strips integrally extending from the clip body and arranged in parallel. The clip strips of the clips on the two rotating drums are arranged in alignment with each other.

3. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 1, characterized in that: The bottom of the horizontal push seat is arc-shaped.

4. The rotary transfer assembly of 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 rotary transfer assembly of high-density integrated circuit lead frames according to claim 1, 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. The support rod is passed through the linear bearings matching the first disk body and the second disk body.

6. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 5, characterized in that: The clamping mechanism is provided with a return 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 the support rods are aligned with equal lengths and pass through the turntable. After the force of the horizontal pushing mechanism on the support rods is released, the return spring drives the support rods to return to the initial position.

7. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 6, characterized in that: The return spring is sleeved outside the support rod and is compressed to apply a thrust to the clamping assembly.

8. The rotary transfer assembly of 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.

9. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 5, characterized in that: 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 pipe hole is opened near the rotation center of the second disk body. The pneumatic slip ring and the opening and closing drive finger cylinder are connected through a soft air pipe, and the soft air pipe passes through the extension tube and the pipe hole.

10. The rotary transfer assembly of high-density integrated circuit lead frames according to claim 9, characterized in that: The number of opening and closing drive modules in each group of clamping mechanisms is more than two groups, the supporting 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.

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