Rotary high-speed material carrying equipment for high-density integrated circuit lead frame

Abstract

The invention relates to the technical field of lead frame carrying equipment, in particular to rotary high-speed material carrying equipment for a high-density integrated circuit lead frame, which is used for taking down the lead frame from a conveying steel belt or transferring the lead frame to the conveying steel belt. Comprising a turntable with a transversely arranged central shaft and a transposition driving module for driving the turntable to rotate step by step; a plurality of groups of material clamping mechanisms are separately arranged around a central shaft of the turntable, each group of material clamping mechanism comprises a supporting rod and a material clamping assembly which is mounted on the supporting rod in an opening and closing manner, and the supporting rod is provided with an opening and closing driving module for driving the material clamping assembly to clamp / loosen; the supporting rod of each clamping mechanism is slidably installed on the rotary disc, and the sliding direction of the supporting rod is parallel to the conveying steel belt. Transverse pushing mechanisms used for pushing the corresponding supporting rods are arranged beside the rotary disc so that the supporting rods, the clamping assemblies on the supporting rods and the conveying steel belt can move synchronously. 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.

Description

Technical Field

[0001] The invention relates to the technical field of lead frame handling equipment, in particular to a rotary high-speed material handling equipment for a high-density integrated circuit lead frame. 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 that can quickly clamp and release the lead frame at different positions through 360° rotation of multiple clamping mechanisms. This technology has not yet been made public. The existing flip transfer mechanism can move synchronously with the steel belt to transfer the lead frame between the steel belt without stopping. Therefore, in order to maintain the need for non-stop operation, the rotary loading urgently needs to design a follow-up non-stop structure. Summary of the invention

[0006] In view of the above technical problems in the prior art, the present invention provides a rotary high-speed material handling device for a high-density integrated circuit lead frame.

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

[0008] A rotary high-speed material handling device for high-density integrated circuit lead frames is provided, which is used to remove the lead frames from a conveyor steel belt or transfer the lead frames to a conveyor steel belt, and is characterized by 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 clamping mechanisms are arranged around the central axis of the rotating disk, each of which comprises a support rod and a clamping assembly for clamping / relaxing the lead frame and which is foldably mounted on the support rod. The support rod is provided with a clamping drive 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.

[0010] The support rods of each group of clamping mechanisms are slidably mounted on the turntable, and their sliding direction is parallel to the movement direction of the conveyor belt; a horizontal pushing mechanism for pushing the corresponding support rods is provided on the side of the turntable, so that the support rods and the clamping components thereon move synchronously with the conveyor belt.

[0011] As a further optional solution, 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 conveyor steel belt. The follower seat is slidably installed on the follower rail. The bracket is provided with a follower driving module for driving the follower seat; the follower seat is provided with a transverse pushing seat for pushing the end of the support rod.

[0012] As a further optional solution, the clamping assembly includes two rotating drums arranged in parallel and rotatably mounted on a support rod, and clips respectively fixed to the two rotating drums. The opening and closing drive module is used to drive the two rotating drums to rotate in opposite directions to drive the clips of the two rotating drums to move closer to clamp the lead frame or move away from each other to release the lead frame.

[0013] As a further optional solution, each clip includes a sheet body and a plurality of parallelly arranged clip strips extending integrally from the sheet body, and the clip strips of the clips on the two rotating drums are arranged in alignment with each other.

[0014] As a further optional solution, the support rod includes a first rod body and a second rod body which are arranged side by side and fixed to each other, and the two rotating drums are rotatably mounted outside the first rod body and the second rod body via bearings respectively.

[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 that match the first disk body and the second disk body.

[0016] As a further optional solution, 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 and pass through the turntable with equal lengths. After the force of the horizontal pushing mechanism on the support rods is released, the reset spring drives the support rods to return 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 thrust 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 scheme, 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. The pneumatic slip ring and the opening and closing drive finger cylinder are connected by a soft air pipe, and the soft air pipe passes through the extension tube and the through-tube hole.

[0020] Beneficial effects of the present invention:

[0021] The rotary high-speed material handling equipment for high-density integrated circuit lead frames 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 independently at different positions. Moreover, when cooperating with the conveyor steel belt to take and put materials, the horizontal push mechanism can move the corresponding support rod and the clamping piece thereon synchronously with the conveyor steel belt, so that the clamping piece 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 needs of assembly line processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

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

[0024] Figure 3 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.

[0025] Figure 4 Schematic diagram of the structure of the disk 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 rotating drum and its clips in the embodiment.

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

[0029] Figure 8 It is a structural schematic diagram of a single opening and closing drive module in an embodiment.

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

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

[0032] Reference numerals:

[0033] 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.

[0034] 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 .

[0035] Conveyor steel belt H.

[0036] Transverse pushing mechanism 3 , bracket 31 , follower rail 32 , follower seat 33 , follower drive module 34 , and transverse pushing seat 35 . DETAILED DESCRIPTION

[0037] 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.

[0038] The rotary high-speed material handling device for high-density integrated circuit lead frames of this embodiment is used to remove the lead frames from the conveyor belt or transfer the lead frames to the conveyor belt, such as Figures 1 to 10 As shown, the device 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In this embodiment, a horizontal pushing mechanism 3 for pushing the corresponding support rod 11 is provided on the side of the rotating disk 21. In this embodiment, the support rod 11 at the upper position is pushed. The opening of the clip 16 on the support rod 11 is aligned with the conveyor belt H, so that the support rod 11 and the clip 16 thereon move synchronously with the conveyor belt H. In this way, the clip 16 and the conveyor belt H are relatively stationary, which is convenient for removing the lead frame from the conveyor belt H or handing the lead frame to the conveyor belt H. The horizontal pushing 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 belt H. The follower seat 33 is slidably installed on the follower rail 32. The bracket 31 is provided with a follower driving module 34 for driving the follower seat 33; the follower seat 33 is provided with a horizontal pushing seat 35 for abutting and pushing the end of the support rod 11.

[0046] 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.

[0047] 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.

[0048] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A rotary high-speed material handling device for high-density integrated circuit lead frames, used to remove lead frames from a conveyor belt or transfer lead frames to a conveyor belt, 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 are arranged around the central axis of the rotating disk, each clamping mechanism comprising a support rod and a clamping assembly for clamping / relaxing the lead frame and being foldably mounted on the support rod, wherein 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 limit piece to limit the axial displacement of the clamping assembly relative to the support rod; The support rods of each group of clamping mechanisms are slidably mounted on the turntable, and their sliding direction is parallel to the movement direction of the conveyor belt; a horizontal pushing mechanism for pushing the corresponding support rods is provided on the side of the turntable, so that the support rods and the clamping components thereon move synchronously with the conveyor belt.

2. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 1, characterized in that: The horizontal pushing mechanism includes a bracket, a follower rail and a follower seat. The follower rail is fixed to the bracket and parallel to the conveyor steel belt. The follower seat is slidably installed on the follower rail. The bracket is provided with a follower driving module for driving the follower seat; the follower seat is provided with a horizontal pushing seat for resisting and pushing the end of the support rod.

3. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 1, characterized in that: The clamping assembly includes two rotating drums arranged in parallel and rotatably mounted on the support rod, and clamps respectively fixed to the two rotating drums. The opening and closing driving module is used to drive the two rotating drums to rotate in opposite directions to drive the clamps of the two rotating drums to move closer to clamp the lead frame or move away from each other to release the lead frame.

4. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 3, 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.

5. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 3, characterized in that: The support rod comprises a first rod body and a second rod body which are arranged in parallel and fixed to each other, and two rotating drums are rotatably mounted outside the first rod body and the second rod body via bearings respectively.

6. The rotary high-speed material handling equipment 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 one-to-one aligned linear bearings, and the support rod is penetrated by the linear bearings that match the first disk body and the second disk body.

7. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 6, characterized in that: The clamping mechanism is provided with a reset spring to keep each group of the clamping mechanism 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 to return to the initial position.

8. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 7, characterized in that: The return spring is sleeved outside the support rod, and is compressed to apply a thrust to the clamping assembly.

9. The high-speed rotary material handling device for high-density integrated circuit lead frames according to claim 6, 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.

10. The rotary high-speed material handling device for high-density integrated circuit lead frames according to claim 9, 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 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 pipe hole.

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