Straightening and stacking equipment for lead frame processing

Abstract

The invention relates to the technical field of lead frame stacking equipment, in particular to straightening and stacking equipment for lead frame processing, which comprises a rack, the rack is provided with a conveying mechanism and is rotatably connected with a rotating frame, the rack is fixedly connected with a storage box, and the rotating frame is fixedly connected with a first push rod and a telescopic rod. The telescopic end of the telescopic rod is fixedly connected with a mounting frame, the mounting frame is rotatably connected with a rotating shaft, the rotating shaft is fixedly connected with a rotating plate, the rotating plate is slidably connected with connecting pieces which are distributed at equal intervals in the circumferential direction, and the connecting pieces are detachably provided with suction cups. By arranging the suckers which are distributed at equal intervals in the circumferential direction, when the suckers in use are damaged and cannot normally suck the lead frames, the damaged suckers are replaced, so that the equipment can replace the damaged suckers and continue to stack the lead frames without shutdown, the influence of equipment faults on the work of the whole production line is reduced, and the production efficiency is improved. And the production efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead frame stacking equipment, in particular to a lead frame processing alignment stacking equipment. BACKGROUND

[0002] The lead frame stacking equipment is one of the most important automatic equipment in the semiconductor post-packaging production line (especially lead frame packaging such as DIP, SOP, QFP, QFN / DFN, etc.), which is responsible for accurately, efficiently and non-damagingly stacking the processed lead frame units (usually from stamping or etching equipment) into a specified height of material pile, so as to facilitate subsequent storage, transportation and input into the plastic packaging process.

[0003] The existing stacking equipment usually uses a suction cup to pick up the lead frame from the conveying mechanism, and then transfers the lead frame to the storage box for release, thereby completing the stacking of the lead frame. However, as the service time of the suction cup increases, the suction cup may be damaged due to material aging and other reasons. Therefore, the suction cup needs to be replaced regularly. However, it cannot be guaranteed that each suction cup will fail after the specified service period. Some suction cups may fail due to damage before replacement, which will affect the normal work of the equipment. In this case, the equipment needs to be stopped for replacement, which will delay the stacking of the lead frame and even cause the entire production line to stop production, thereby seriously affecting the production efficiency. SUMMARY

[0004] In order to overcome the shortcomings mentioned in the background, the present application provides a lead frame processing alignment stacking equipment.

[0005] The technical scheme is as follows: a lead frame processing alignment stacking equipment, comprising a rack, the rack is provided with a conveying mechanism and is rotationally connected with a rotating frame, the rack is fixedly connected with a storage box, a first motor and a vacuum pump, the output shaft of the first motor is connected with the rotating frame through a gear set transmission, the rotating frame is fixedly connected with a first push rod and a telescopic rod, the telescopic end of the telescopic rod is fixedly connected with a mounting frame, the telescopic end of the first push rod is fixedly connected with the mounting frame, the mounting frame is fixedly connected with a connecting head and a second motor, the air inlet of the vacuum pump is connected with the connecting head through a pipeline, the mounting frame is rotationally connected with a rotating shaft, the output shaft of the second motor is connected with the rotating shaft through a gear set transmission, the rotating shaft is fixedly connected with a rotating plate, the rotating plate is slidingly connected with circumferentially equidistantly distributed connecting pieces, the connecting head is connected with adjacent connecting pieces, and the connecting pieces are detachably connected with suction cups.

[0006] Preferably, the connecting head is provided with a tension sensor, the connecting head is slidingly connected with a sliding plate, and a tension spring is arranged between the sliding plate and the tension sensor.

[0007] Preferably, the connecting piece is slidingly connected with a limiting post, a spring is arranged between the connecting piece and the limiting post, the suction disc is provided with a limiting slot, and the limiting post is inserted into the limiting slot to limit the suction disc.

[0008] Preferably, the mounting frame is fixedly connected with a positioning sliding rail, the connecting piece is fixedly connected with a fixing seat, two rollers are rotationally connected with the fixing seat, and the two rollers are symmetrically arranged on two sides of the positioning sliding rail.

[0009] Preferably, the upper side of the storage box is hingedly connected with two box doors, a second push rod is fixedly connected to the outside of the storage box, and the box doors are hingedly connected with two connecting rods, both of which are hingedly connected with the telescopic end of the second push rod.

[0010] Preferably, the rack is fixedly connected with a fan, the air outlet of the fan is in communication with the bottom of the storage box through a pipeline, and a filter is arranged in the pipeline.

[0011] Preferably, a placing rack is fixedly connected in the storage box, and the placing rack is used for supporting the lead frame.

[0012] Preferably, the connecting piece is provided with a first sealing piece and a second sealing piece, the connecting head and the adjacent first sealing piece are extruded with each other, and the second sealing piece and the adjacent suction disc are extruded with each other.

[0013] Preferably, the bottom of the connecting head is provided with an extrusion part, and the longitudinal section edge of the extrusion part is a circular arc, so as to reduce damage to the first sealing piece when the first sealing piece is extruded.

[0014] Preferably, the connecting piece is provided with an expansion part, and the expansion part is used for guiding the connecting head.

[0015] Beneficial effects are: 1. The present application is provided with circumferentially and equidistantly distributed suction discs. When the suction disc is damaged and cannot normally suck the lead frame, the damaged suction disc can be replaced, so that the device can continue to stack the lead frame without stopping, reducing the influence of device failure on the entire production line, and ensuring the production efficiency.

[0016] 2. The height of the suction disc is changed by the positioning sliding rail, so that the suction disc not in use is higher than the suction disc in use, thereby avoiding the influence of the suction disc not in use on the suction of the lead frame by the suction disc in use.

[0017] 3. The air in the storage box is ventilated by the fan, so that the air flow blows out of the storage box, thereby reducing the probability of dust in the air falling into the storage box, and reducing the probability of dust in the air falling on the lead frame in the storage box, so as to protect the lead frame. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A perspective view of the present application; Figure 2 A perspective view of the present application; Figure 3 A perspective view of the present application; Figure 4 An exploded view of the present application; Figure 5 A perspective view of the present application;

[0019] BRIEF DESCRIPTION OF DRAWINGS: 1-Frame, 101-Storage box, 2-Conveying mechanism, 3-Rotating frame, 301-First push rod, 4-First motor, 5-Extension rod, 6-Mounting frame, 7-Connector, 701-Squeezing part, 8-Vacuum pump, 9-Rotating shaft, 10-Rotating plate, 11-Connector, 1101-Expansion part, 12-Suction cup, 13-Second motor, 14-Tension sensor, 15-Sliding plate, 16-Tension spring, 17-Limiting column, 18-Spring, 19-Limiting groove, 20-Positioning slide rail, 21-Fixed seat, 22-Roller, 23-Box door, 24-Second push rod, 25-Connecting rod, 26-Fan, 27-Placing frame, 28-First sealing element, 29-Second sealing element. DETAILED DESCRIPTION

[0020] The present application will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0021] Example 1

[0022] The existing equipment cannot automatically replace the damaged suction cup during use, and needs to be operated after the equipment is stopped, which affects the stacking efficiency of the lead frame.

[0023] A kind of lead frame processing is used to place right and stack equipment, such as Figures 1-5As shown, including organic frame 1, frame 1 is provided with conveying mechanism 2 and rotary connection with rotary frame 3, conveying mechanism 2 is used to link upstream equipment, and the lead frame is transported to the stacking place, rotary frame 3 is L-shaped, frame 1 is fixedly connected with storage box 101, first motor 4 and vacuum pump 8, storage box 101 is used for stacking lead frame, the output shaft of first motor 4 and rotary frame 3 are driven through gear set, the left side of rotary frame 3 is fixedly connected with first push rod 301 and telescopic rod 5, the telescopic end of telescopic rod 5 is fixedly connected with mounting bracket 6, the telescopic end of first push rod 301 is fixedly connected with mounting bracket 6, mounting bracket 6 is fixedly connected with connecting head 7 and second motor 13, connecting head 7 penetrates mounting bracket 6, the air inlet of vacuum pump 8 is communicated with connecting head 7 through pipeline, connecting head 7 is made of hard material, mounting bracket 6 is rotatably connected with rotating shaft 9, rotating shaft 9 is located between connecting head 7 and second motor 13, the output shaft of second motor 13 and the upper part of rotating shaft 9 are driven through gear set, the lower part of rotating shaft 9 is fixedly connected with rotating plate 10, rotating plate 10 is slidably connected with two circumferentially equidistantly distributed connecting pieces 11, the number of connecting pieces 11 can be adjusted as required, two are shown in the figure as an example, connecting head 7 is communicated with adjacent connecting piece 11, the lower side of connecting piece 11 is detachably mounted with suction cup 12, suction cup 12 is composed of upper mounting part and lower adsorption part, the mounting part of suction cup 12 is made of hard material. The bottom of connecting head 7 is provided with extrusion part 701, the longitudinal section edge of extrusion part 701 is circular arc, which is used to reduce the damage of first sealing element 28 when being extruded. Connecting piece 11 is provided with expansion part 1101, expansion part 1101 is used to guide connecting head 7, so as to increase the fault tolerance when connecting connecting piece 11 and connecting head 7, even if the lower part of connecting head 7 cannot be completely aligned with the middle part of connecting piece 11, the connection between them can also be completed, the above structure can be provided with multiple groups as required, one group is shown in the figure as an example.

[0024] As shown in the figure, Figure 4 Connecting head 7 is provided with tension sensor 14, sliding plate 15 is slidably connected with connecting head 7, sealing element is arranged between sliding plate 15 and connecting head 7, so as to separate the space on both sides of sliding plate 15, tension spring 16 is arranged between sliding plate 15 and tension sensor 14, when the air pressure in connecting head 7 changes, the position of sliding plate 15 changes accordingly, and the length of tension spring 16 also changes, the tension of tension sensor 14 also changes accordingly, so as to detect the air pressure in connecting head 7 through tension sensor 14, to judge whether the lead frame is normally sucked by suction cup 12.

[0025] As shown in the figure, Figure 4As shown, the connecting piece 11 is slidingly connected with the limiting post 17, the limiting post 17 is composed of a cylinder and a hemisphere, a spring 18 is arranged between the connecting piece 11 and the limiting post 17, the suction cup 12 is provided with a limiting groove 19, the limiting post 17 is used for inserting into the limiting groove 19 to limit the suction cup 12, the depth of the limiting groove 19 is less than the radius of the hemisphere of the limiting post 17, so that the quick connection and disassembly between the suction cup 12 and the connecting piece 11 is realized.

[0026] As shown in Figure 3 and Figure 4 The mounting frame 6 is fixedly connected with the positioning slide rail 20, the projection of the positioning slide rail 20 on the horizontal plane is circular, but the front part of the positioning slide rail 20 is lower than the rear part, so that when the suction cup 12 in work sucks the lead frame, the rear suction cup 12 will not contact the lead frame, the connecting piece 11 is fixedly connected with the fixing seat 21, the fixing seat 21 is rotationally connected with two rollers 22, the two rollers 22 are symmetrically distributed up and down and respectively located on the upper and lower sides of the positioning slide rail 20, so that the two rollers 22 on the same fixing seat 21 are limited by the positioning slide rail 20 to change the height of the fixing seat 21.

[0027] As shown in Figure 4 The connecting piece 11 is provided with the first sealing piece 28 and the second sealing piece 29, the connecting head 7 and the adjacent first sealing piece 28 are extruded with each other, the second sealing piece 29 and the adjacent suction cup 12 are extruded with each other, so as to improve the sealing between the connecting piece 11 and the connecting head 7, and between the connecting piece 11 and the adjacent suction cup 12.

[0028] When the device is used to stack lead frames, the conveying mechanism 2 transports the lead frame to the lower side of the suction plate 12, at this time the first push rod 301 starts to work, the telescopic end of the first push rod 301 drives the mounting frame 6 to move downward, the mounting frame 6 drives the connecting head 7 and the rotating shaft 9 to move downward, the connecting head 7 and the rotating shaft 9 drive the rotating plate 10 and the connecting piece 11 to move, the connecting piece 11 drives the suction plate 12 to move, when the suction plate 12 in use contacts the lead frame, the first push rod 301 stops working, and at the same time the vacuum pump 8 starts to work, the vacuum pump 8 pumps the air between the suction plate 12 and the lead frame out through the connecting head 7 and the connecting piece 11, and a negative pressure is formed between the suction plate 12 and the lead frame, so that the suction plate 12 sucks the lead frame, as the air pressure in the connecting head 7 gradually decreases, the sliding plate 15 moves and stretches the tension spring 16, and the tension of the tension sensor 14 gradually increases, when the suction plate 12 sucks the lead frame, the sliding plate 15 stops moving, then the telescopic end of the first push rod 301 retracts, the suction plate 12 is lifted up, then the first motor 4 starts to work, the output shaft of the first motor 4 drives the rotating frame 3 to rotate through the gear set, the rotating frame 3 drives the suction plate 12 to move to the upper side of the storage box 101, then the first motor 4 stops working, at the same time the telescopic end of the first push rod 301 extends, the lead frame moves downward, then the vacuum pump 8 stops working, the suction plate 12 releases the lead frame, and the lead frame enters the storage box 101, then the telescopic end of the first push rod 301 returns to the original position, and the first motor 4 starts to work again, the output shaft of the first motor 4 drives the suction plate 12 to rotate to the original position, and is ready to transport the next lead frame.

[0029] When the suction plate 12 in use is damaged and cannot work normally, air leakage occurs in the process that the vacuum pump 8 drives the suction plate 12 to suck the lead frame, at this time the air pressure in the connecting head 7 cannot be reduced to a value that can make the suction plate 12 suck the lead frame, the moving amount of the sliding plate 15 is less than that in normal working, the deformation amount of the tension spring 16 is small, and the tension of the tension sensor 14 is small, at this time the second motor 13 starts to work, the output shaft of the second motor 13 drives the rotating shaft 9 to rotate through the gear set, the rotating shaft 9 drives the rotating plate 10 to rotate, the rotating plate 10 drives the two connecting pieces 11 to rotate, the connecting pieces 11 drive the two suction plates 12 to rotate, so as to replace the suction plate 12, so as to realize the emergency replacement of the suction plate 12, after the replacement of the suction plate 12 is completed, the work can continue, in the interval of stopping the device, the damaged suction plate 12 is replaced, so as to reduce the influence of the damage of the suction plate 12 on the stacking work of the lead frame, in the process of replacing the two suction plates 12, the connecting piece 11 drives the fixed seat 21 to rotate, the fixed seat 21 changes the position of the adjacent two rollers 22 through the limiting of the positioning sliding rail 20, so as to lift up the damaged suction plate 12 and lower the undamaged suction plate 12, thereby avoiding the situation that the undamaged suction plate 12 affects the suction plate 12 in use to suck the lead frame.

[0030] Embodiment 2

[0031] The existing device, when stacking the lead frame, the dust in the air will fall on the lead frame, and then stacking the lead frame upward will squeeze the dust, thus causing scratches on the lead frame.

[0032] Based on embodiment 1, as shown in Figure 1 and Figure 5 , the upper side of the storage box 101 is hinged with two box doors 23, when the lead frame is put into the storage box 101, the box door 23 is opened, and when the lead frame is stacked, the box door 23 is closed to block the dust in the air from falling into the storage box 101, and the rear side of the storage box 101 is fixedly connected with a second push rod 24, and the box door 23 is hinged with a connecting rod 25, both of which are hinged with the telescopic end of the second push rod 24, so as to control the opening and closing of the box door 23 through the second push rod 24.

[0033] As shown in Figure 1 and Figure 5 , the rack 1 is fixedly connected with a fan 26, and the air outlet of the fan 26 is communicated with the bottom of the storage box 101 through a pipeline, so that the fan 26 supplies air to the storage box 101, and then the air flow is blown out upward from the storage box 101, so as to reduce the probability of air entering during the process of putting the lead frame into the storage box 101. A filter is arranged in the pipeline to filter the air flow blown into the storage box 101 by the fan 26, so as to prevent the dust in the air from entering the storage box 101 with the air flow.

[0034] Before the suction cup 12 transfers the lead frame to above the storage box 101, the fan 26 is started, and the fan 26 blows air into the storage box 101 through the pipeline, and then the second push rod 24 is started, the telescopic end of the second push rod 24 is extended, and the two box doors 23 are opened through the two connecting rods 25, so that the air flow in the storage box 101 is blown out, reducing the probability of dust in the air floating into the storage box 101, and reducing the wear between the lead frames caused by the presence of dust. When the storage box 101 is full of lead frames, the second push rod 24 is started first, the telescopic end of the second push rod 24 drives the box door 23 to close, and then the fan 26 is closed, and then the lead frames in the storage box 101 can be taken out to prepare for the next stacking of the lead frames.

[0035] Embodiment 3

[0036] Based on embodiment 1, as shown in Figure 5 , a placing rack 27 is fixedly connected in the storage box 101, which is used to support the lead frame so that the lead frame does not stick to the bottom of the storage box 101, thus facilitating the lead frame to be taken out of the storage box 101.

[0037] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made by using the content of the present application, is also included in the patent protection scope of the present application.

Claims

1. A straightening and stacking device for processing lead frame, comprising a frame (1), wherein the frame (1) is provided with a conveying mechanism (2) and rotatably connected to a rotating frame (3), wherein the frame (1) is fixedly connected to a storage box (101), a first motor (4) and a vacuum pump (8), wherein the output shaft of the first motor (4) is driven to the rotating frame (3) by a gear set, wherein the rotating frame (3) is fixedly connected to a first push rod (301) and a telescopic rod (5), wherein the telescopic end of the telescopic rod (5) is fixedly connected to a mounting frame (6), and the telescopic end of the first push rod (301) is fixedly connected to the mounting frame (6), characterized in that, The mounting bracket (6) is fixedly connected to a connector (7) and a second motor (13). The air inlet of the vacuum pump (8) is connected to the connector (7) through a pipe. The mounting bracket (6) is rotatably connected to a rotating shaft (9). The output shaft of the second motor (13) is driven by a gear set to the rotating shaft (9). The rotating shaft (9) is fixedly connected to a rotating plate (10). The rotating plate (10) is slidably connected to circumferentially spaced connecting pieces (11). The connector (7) is connected to the adjacent connecting piece (11). The connecting piece (11) is detachably equipped with a suction cup (12).

2. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The connector (7) is provided with a tension sensor (14), and the connector (7) is slidably connected to a sliding plate (15). A tension spring (16) is provided between the sliding plate (15) and the tension sensor (14).

3. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The connector (11) is slidably connected to the limiting post (17), and a spring (18) is provided between the limiting post (17) and the connector (11). The suction cup (12) is provided with a limiting groove (19), and the limiting post (17) is used to insert into the limiting groove (19) to limit the suction cup (12).

4. The alignment and stacking equipment for lead frame processing according to claim 3, characterized in that, The mounting bracket (6) is fixedly connected to a positioning slide rail (20), and the connector (11) is fixedly connected to a fixing seat (21). The fixing seat (21) is rotatably connected to two rollers (22). The two rollers (22) are symmetrically distributed and located on both sides of the positioning slide rail (20).

5. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The storage box (101) has two doors (23) hinged to its upper side. A second push rod (24) is fixed to the outside of the storage box (101). The doors (23) are hinged to connecting rods (25). Both connecting rods (25) are hinged to the telescopic ends of the second push rod (24).

6. The alignment and stacking equipment for lead frame processing according to claim 5, characterized in that, The frame (1) is fixedly connected to a fan (26), and the air outlet of the fan (26) is connected to the bottom of the storage box (101) through a pipe, which is equipped with a filter.

7. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The storage box (101) is fixedly connected to a placement rack (27), which is used to support the lead frame.

8. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The connector (11) is provided with a first seal (28) and a second seal (29). The connector (7) is pressed against the adjacent first seal (28), and the second seal (29) is pressed against the adjacent suction cup (12).

9. The alignment and stacking equipment for lead frame processing according to claim 8, characterized in that, The bottom of the connector (7) is provided with a compression part (701), and the longitudinal section edge of the compression part (701) is rounded to reduce the damage to the first seal (28) when it is compressed.

10. The alignment and stacking equipment for lead frame processing according to claim 1, characterized in that, The connector (11) is provided with an expansion portion (1101) for guiding the connector (7).

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