Cutting and receiving device for lead frame

Abstract

The invention relates to the technical field of semiconductor device processing, and particularly discloses a cutting and receiving device of a lead frame, a movable hole is formed in a first pressing plate, a first contact pin can extend into a first feeding channel in the z direction and penetrate through a side hole of the lead frame, the lead frame is driven by the first contact pin to move in the x direction, and conveying of the lead frame is achieved; after the lead frame is conveyed to the position of the cutting mechanism, the lead frame is cut off through the upper cutter, the cut sheet-shaped lead frame is conveyed to the position of the lifting frame through the second conveying rail, the material box capable of moving in the z direction is installed in the lifting frame, the sheet-shaped lead frame is installed in a stacked mode through lifting control of the material box, and after the material box is fully loaded, the sheet-shaped lead frame is conveyed to the position of the lifting frame through the second conveying rail. The first lifting driving device drives the material boxes to descend to the conveying device, the conveying device conveys and discharges the materials, the structure is simple, and the boxing efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of semiconductor device processing, and in particular to a cutting and collecting device for a lead frame. Background Art

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

[0003] The production process of lead frames usually includes stamping, electroplating, cutting, and material collection. In the cutting and material collection process, the rolled lead frame structure is usually unloaded and cut to form a sheet lead frame with a certain length, and then the lead frames are loaded into the material box through the material box. In the prior art, after the rolled lead frame is unloaded, the material is transported by a belt conveyor. Due to the smooth surface of the lead frame, it is difficult to transport the lead frame. On the other hand, after the lead frame is cut, a robot arm is usually used in conjunction with a suction cup to load the sheet lead frame into the material box, which is inefficient.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a lead frame cutting and collecting device to solve the above-mentioned problems.

[0006] A cutting and collecting device for a lead frame, comprising: A base, wherein a mounting frame and a processing table are provided on the base; A material discharging mechanism, comprising a material tray rotatably arranged on the mounting frame and used for discharging the lead frame; A first feeding mechanism comprises a first conveying track fixed to the processing table along the x-direction, and a first pressing plate fixed to the upper end of the first conveying track, wherein a first feeding channel for conveying the lead frame is formed between the first conveying track and the first pressing plate, and a movable hole extending along the x-direction is provided on the first pressing plate; A material pulling mechanism, comprising a first pin movable in the movable hole along the x-direction and extending into the first feeding channel along the z-direction, wherein the first pin can pass through the side hole of the lead frame; A cutting mechanism, comprising a lower die assembly fixed to the processing table and connected to the first conveying track, and an upper cutter movable above the lower die assembly along the z-direction, wherein the lower die assembly is provided with a second feeding channel for conveying the lead frame; The material receiving mechanism includes a second conveying track connected to the discharge end of the second feeding channel, a lifting frame arranged on one side of the discharge end of the second conveying track, a plurality of material boxes movable on the lifting frame along the z direction, a first lifting drive device for controlling the lifting of the material boxes along the z direction, and a conveying device arranged under the lifting frame and used to transfer the material boxes.

[0007] Specifically, a downwardly curved guide plate is provided at one end of the first conveying track toward the material tray, and a sensor is provided under the guide plate. The sensor is used to sense the lead frame released from the material tray. The discharge mechanism also includes a servo motor fixed to the mounting frame and used to control the discharge speed of the material tray.

[0008] Specifically, the cutting and collecting device also includes an anti-backward mechanism, which includes a first fixed seat and a second fixed seat respectively fixed on both sides of the upper end of the first conveying track along the y direction, a first pressing block that moves along the z direction on the first fixed seat and is used to press the lead frame, and a second pressing block that moves along the z direction on the second fixed seat and is used to press the lead frame.

[0009] Specifically, the upper end of the first pressing block is connected to a first round-head pin, the upper end of the second pressing block is connected to a second round-head pin, the first round-head pin is hinged with a swing arm, and the other end of the swing arm can swing to engage with the second round-head pin.

[0010] Specifically, the pulling mechanism also includes a first slide rail fixed to the processing table and extending along the x-direction, a first slider sliding along the first slide rail, a first driving device for driving the first slider, a sliding seat fixed to the first slider, a second slider that can slide on the sliding seat along the x-direction, a second driving device fixed to the sliding seat and used to drive the second slider, and a lifting rod driven by the second slider and capable of being lifted and lowered along the z-direction, the first pin is fixed to the lifting rod, the second slider is provided with a sliding groove inclined upward along the x-direction, the lifting rod is connected to a connecting shaft, and the connecting shaft moves in the sliding groove.

[0011] Specifically, the lower mold assembly includes a bottom plate fixed to the upper end of the processing table, a third conveying track fixed to the bottom plate, and a second pressure plate fixed to the upper end of the third conveying track. The cutting mechanism also includes a column fixed to the bottom plate, a top plate fixed to the top of the column, a second lifting drive device fixed to the top plate, and an upper mold base connected to the output end of the second lifting drive device. The upper cutting knife is fixed to the lower end of the upper mold base, and the second pressure plate is provided with a first avoidance groove for the upper cutting knife to be pressed into.

[0012] Specifically, a cutting table cooperating with the upper cutter is provided in the middle of the third conveying track, and guide grooves inclined downward are provided on both sides of the cutting table along the x-direction, and a debris discharge chute penetrating downward through the bottom plate is provided at the bottom of the guide groove.

[0013] Specifically, a second pin is fixed to the lower end of the upper mold base, and a through hole for the second pin to pass through is provided on the second pressing plate, and the second pin can pass through the side hole of the lead frame.

[0014] Specifically, a clamping mechanism is also fixed to the lower end of the upper mold base, and the clamping mechanism includes a spring connected to the lower end of the upper mold base, a pressing seat connected to the lower end of the spring, and two pressure strips respectively arranged on both sides of the bottom of the pressing seat along the y direction, and the positions of the two pressure strips along the y direction are adjustable, and the second pressure plate is provided with a second avoidance groove for the pressure strip to be pressed into.

[0015] Specifically, the lifting frame is provided with a plurality of clamping mechanisms for clamping the material box, the clamping mechanisms include a bracket fixed on the lifting frame, a third driving device fixed on the bracket and driven toward the inner side of the lifting frame, and a pressure pad connected to the output end of the third driving device, and the pressure pad is used to press the material box at the bottom of the inner side of the lifting frame; The conveying device is a double-belt conveying device, and the output end of the first lifting drive device is connected to a support plate, which can pass through the middle of the conveying device along the z direction and then support the material box at the bottom of the inner side of the lifting frame.

[0016] Beneficial effects of the present invention: The cutting and collecting device of the present invention first winds the rolled lead frame on a material tray, and after the material tray is unloaded, the lead frame is sequentially passed through the first feeding channel and the second feeding channel, and a movable hole is arranged on the first pressing plate, and the first insertion pin can extend into the first feeding channel along the z direction and pass through the side hole of the lead frame, and the first insertion pin is used to drive the lead frame to move along the x direction, and after the first insertion pin moves a certain stroke along the x direction, the first insertion pin can exit the side hole of the lead frame along the z direction, and the first insertion pin is reset to the initial position along the x direction, and the above operation is repeated to realize the cutting and collecting device of the present invention. The lead frame is driven by the first pin to ensure smooth transportation of the lead frame. When the lead frame is transported to the cutting mechanism position, the lead frame is cut by the upper cutter, and the sheet lead frame obtained after cutting is transported to the lifting frame position through the second conveying track. The lifting frame is equipped with a material box that can move along the z direction. The sheet lead frame is loaded in a stacked manner through the lifting control of the material box. After the material box is fully loaded, the material box is driven by the first lifting drive device to be lowered to the conveying device, and the conveying device conveys the material out. The structure is simple and the box loading efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a schematic diagram of the structure of the lead frame; Figure 2 A three-dimensional diagram of the cutting and collecting device of the present application; Figure 3 A three-dimensional diagram of the first feeding mechanism and the pulling mechanism of the present application; Figure 4 A top view of the first feeding mechanism and the pulling mechanism of the present application; Figure 5 for Figure 4 Sectional view along line AA; Figure 6 for Figure 4 A three-dimensional cross-sectional view along line BB; Figure 7 This is a front view of the cutting mechanism of the present application; Figure 8 for Figure 7 A three-dimensional cross-sectional view along the CC line; Fig. 9 A three-dimensional diagram of the lifting frame, material box and clamping mechanism of the present application; Fig.10 It is a three-dimensional diagram of the material box, the first lifting drive device and the conveying device of the present application.

[0018] The accompanying drawings are marked as follows: base 10, mounting frame 11, processing table 12, material discharge mechanism 20, lead frame 21, material tray 22, first feeding mechanism 30, first conveying track 31, first pressing plate 32, movable hole 321, pulling mechanism 40, first pin 41, side hole 23, cutting mechanism 50, lower mold assembly 51, upper cutter 52, material receiving mechanism 60, second conveying track 61, lifting frame 62, material box 63, first lifting drive device 64, conveying device 65, guide plate 33, sensor 34, first fixed seat 71, second fixed seat 72, first pressing block 73, second pressing block 74, first round head pin 75, second round head pin 76, Swing arm 77, first slide rail 42, first slider 43, first drive device 44, sliding seat 45, second slider 46, second drive device 47, lifting rod 48, slide groove 461, connecting shaft 481, bottom plate 511, third conveying track 512, second pressure plate 513, column 53, top plate 54, second lifting drive device 55, upper die seat 56, first avoidance groove 514, cutting table 515, guide groove 516, debris discharge trough 517, second pin 57, through hole 58, clamping mechanism 80, spring 81, pressing seat 82, pressure strip 83, clamping mechanism 90, bracket 91, third drive device 92, pressure pad 93, support plate 66. DETAILED DESCRIPTION

[0019] The present invention provides a lead frame cutting and collecting device. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] like Figures 1 to 10 This embodiment discloses a lead frame cutting and collecting device, comprising: A base 10, on which a mounting frame 11 and a processing table 12 are provided; The material discharging mechanism 20 includes a material tray 22 rotatably mounted on the mounting frame 11 and used for discharging the lead frame 21; The first feeding mechanism 30 includes a first conveying track 31 fixed to the processing table 12 along the x-direction, and a first pressing plate 32 fixed to the upper end of the first conveying track 31. A first feeding channel for conveying the lead frame 21 is formed between the first conveying track 31 and the first pressing plate 32. The first pressing plate 32 is provided with a movable hole 321 extending along the x-direction; The material pulling mechanism 40 includes a first insertion pin 41 that can move in the movable hole 321 along the x direction and can extend into the first feeding channel along the z direction. The first insertion pin 41 can pass through the side hole 23 of the lead frame 21; The cutting mechanism 50 includes a lower die assembly 51 fixed to the processing table 12 and connected to the first conveying track 31, and an upper cutter 52 movable above the lower die assembly 51 along the z direction. The lower die assembly 51 is provided with a second feeding channel for conveying the lead frame 21; The material receiving mechanism 60 includes a second conveying track 61 connected to the discharge end of the second feeding channel, a lifting frame 62 arranged on one side of the discharge end of the second conveying track 61, a plurality of material boxes 63 movable along the z-direction on the lifting frame 62, a first lifting drive device 64 for controlling the lifting and lowering of the material boxes 63 along the z-direction, and a conveying device 65 arranged below the lifting frame 62 and used to transfer the material boxes 63.

[0022] The cutting and collecting device of this embodiment, during processing, firstly winds the rolled lead frame 21 on the material tray 22, and after the material tray 22 discharges the material, the lead frame 21 is passed through the first feeding channel and the second feeding channel in sequence, and a movable hole 321 is provided on the first pressing plate 32 of the first feeding mechanism 30, and by providing the first insertion pin 41, the first insertion pin 41 can extend into the first feeding channel along the z direction and pass through the side hole 23 of the lead frame 21, and the first insertion pin 41 is used to drive the lead frame 21 to move along the x direction, and after the first insertion pin 41 moves a certain stroke along the x direction, the first insertion pin 41 can withdraw from the side hole 23 of the lead frame 21 along the z direction, and the first insertion pin 41 is reset to the initial position along the x direction, and the above operation is repeated. , the lead frame 21 is conveyed, and the first pin 41 is used to drive the lead frame 21, which can ensure the smooth conveyance of the lead frame 21; when the lead frame 21 is conveyed to the cutting mechanism 50, the lead frame 21 is cut by the upper cutter 52, and the sheet lead frame 21 obtained after cutting is conveyed to the lifting frame 62 through the second conveying track 61, and the lifting frame 62 is equipped with a material box 63 that can move along the z direction. Through the lifting control of the material box 63, the sheet lead frame 21 is loaded in a stacked manner. After the material box 63 is fully loaded, the first lifting drive device 64 drives the material box 63 to be lowered to the conveying device 65, and the conveying device 65 conveys the material out. The structure is simple and the box loading efficiency is high.

[0023] For further information, please refer to Figure 2 and Figure 3 , a downwardly curved guide plate 33 is provided at one end of the first conveying track 31 facing the material tray 22. After the material tray 22 is discharged, the lead frame 21 will be located between the material tray 22 and the first feeding mechanism 30 in a U-shaped structure, and then guided into the first feeding mechanism 30 through the guide plate 33. In order to better control the discharge speed of the material tray 22 and avoid the bottom of the U-shaped lead frame 21 being piled up on the ground due to the excessive discharge speed of the material tray 22, a sensor 34 is provided under the guide plate 33 in this embodiment. The sensor 34 is used to sense the lead frame 21 discharged from the material tray 22. The discharge mechanism 20 also includes a servo motor fixed to the mounting frame 11 and used to control the discharge speed of the material tray 22. The sensor 34 is a photoelectric sensor. When the sensor 34 senses the lead frame 21, the servo motor is used to control the reverse rotation of the material tray 22, and part of the lead frame 21 is retracted or the rotation speed of the material tray 22 is reduced by the servo motor, so as to avoid the bottom of the U-shaped lead frame 21 being piled up on the ground due to the excessive discharge speed.

[0024] When the first pin 41 pulls the lead frame 21 toward the cutting mechanism 50, the lead frame 21 will not retreat. However, when the first pin 41 exits the side hole 23 of the lead frame 21 along the z direction, the lead frame 21 may retreat. To solve this problem, please refer to Figure 4 and Figure 6The cutting and collecting device of this embodiment also includes an anti-backward mechanism, which includes a first fixed seat 71 and a second fixed seat 72 respectively fixed on both sides of the upper end of the first conveying track 31 along the y direction, a first pressing block 73 movable along the z direction on the first fixed seat 71 and used to press the lead frame 21, and a second pressing block 74 movable along the z direction on the second fixed seat 72 and used to press the lead frame 21. The first pressing block 73 and the second pressing block 74 have a certain weight, and use their own gravity to press the two sides of the lead frame 21 along the y direction, thereby preventing the lead frame 21 from retreating.

[0025] It should be noted that, since the two side edges of the lead frame 21 along the y direction are treated as waste during the subsequent cutting and forming of the frame base island, although the first pressing block 73 and the second pressing block 74 will scratch the two side edges of the lead frame 21 along the y direction when pressed, it does not affect the surface characteristics of the frame base island in the lead frame 21.

[0026] Of course, as another embodiment, in order to prevent the first pressure block 73 and the second pressure block 74 from scratching the lead frame 21, two cylinders can also be set. When the first pin 41 is inserted into the side hole 23 of the lead frame 21 along the z direction, the first pressure block 73 and the second pressure block 74 are driven upward by the two cylinders respectively, and the first pressure block 73 and the second pressure block 74 no longer press the lead frame 21; when the first pin 41 withdraws from the side hole 23 of the lead frame 21 along the z direction, the first pressure block 73 and the second pressure block 74 are driven downward by the two cylinders respectively, so as to better press the lead frame 21 and prevent the lead frame 21 from retreating.

[0027] For further information, please refer to Figure 6 The upper end of the first pressing block 73 is connected to the first round-head pin 75, and the upper end of the second pressing block 74 is connected to the second round-head pin 76. The first round-head pin 75 is hinged with a swing arm 77, and the other end of the swing arm 77 can be swung to engage with the second round-head pin 76. When the lead frame 21 is loaded into the first feeding channel, the first pressing block 73 and the second pressing block 74 can be pulled up at the same time by the swing arm 77, so that the lead frame 21 can pass through smoothly; in addition, in this embodiment, the swing arm 77 is set to a swingable structure. When it is not necessary to pull up the first pressing block 73 and the second pressing block 74, the swing end of the swing arm 77 can no longer be engaged with the second round-head pin 76, so that an unobstructed spacing structure is formed between the first fixing seat 71 and the second fixing seat 72, which is convenient for inspection and maintenance.

[0028] Please refer to Figures 3 to 5The material pulling mechanism 40 of the present embodiment further includes a first slide rail 42 fixed to the processing table 12 and extending along the x-direction, a first slider 43 sliding along the first slide rail 42, a first driving device 44 for driving the first slider 43, a sliding seat 45 fixed to the first slider 43, a second slider 46 that can slide on the sliding seat 45 along the x-direction, a second driving device 47 fixed to the sliding seat 45 and used to drive the second slider 46, and a lifting rod 48 driven by the second slider 46 and capable of lifting and lowering along the z-direction, the first pin 41 is fixed to the lifting rod 48, the second slider 46 is provided with a sliding groove 461 inclined upward along the x-direction, and the lifting rod 48 is connected to the connecting shaft 4 81, the connecting shaft 481 moves in the slide groove 461, and the first driving device 44 and the second driving device 47 both adopt cylinders; after the first driving device 44 is started, it can drive the first pin 41 to move along the x direction, thereby driving the lead frame 21; after the second driving device 47 is started, it drives the second slider 46 to slide along the x direction. Due to the guiding effect of the inclined upward slide groove 461, the connecting shaft 481 gradually moves up and down along the z direction, and the connecting shaft 481 drives the lifting rod 48 to move up and down along the z direction. The lifting rod 48 drives the first pin 41 to move along the z direction, so that the first pin 41 is inserted into or withdraws from the side hole 23 of the lead frame 21. The structure is ingenious.

[0029] Please refer to Figure 7 and Figure 8 The lower mold assembly 51 of this embodiment includes a bottom plate 511 fixed to the upper end of the processing table 12, a third conveying track 512 fixed on the bottom plate 511, and a second pressing plate 513 fixed to the upper end of the third conveying track 512. The cutting mechanism 50 also includes a column 53 fixed to the bottom plate 511, a top plate 54 fixed to the top of the column 53, a second lifting drive device 55 fixed to the top plate 54, and an upper mold base 56 connected to the output end of the second lifting drive device 55. The upper cutter 52 is fixed to the lower end of the upper mold base 56. The second pressing plate 513 is provided with a first avoidance groove 514 for the upper cutter 52 to be pressed into. The second lifting drive device 55 can use a cylinder, and the second lifting drive device 55 drives the upper mold base 56 to be pressed down, thereby driving the upper cutter 52 to be pressed down to cut the lead frame 21.

[0030] Furthermore, a cutting table 515 cooperating with the upper cutter 52 is provided in the middle of the third conveying track 512 of the present embodiment, and downwardly inclined guide grooves 516 are provided on both sides of the cutting table 515 along the x-direction, and a debris discharge trough 517 penetrating downward through the bottom plate 511 is provided at the bottom of the guide groove 516. By providing the guide groove 516 and the debris discharge trough 517, metal debris generated by cutting can be guided out, thereby preventing metal debris from accumulating near the cutting table 515 and affecting subsequent cutting actions.

[0031] Furthermore, a second pin 57 is fixed to the lower end of the upper mold base 56, and a through hole 58 is provided on the second pressure plate 513 for the second pin 57 to pass through. The second pin 57 can pass through the side hole 23 of the lead frame 21. By providing the second pin 57, the lead frame 21 can be positioned more accurately to ensure the cutting accuracy.

[0032] Furthermore, a clamping mechanism 80 is fixed to the lower end of the upper mold base 56. The clamping mechanism 80 has two parts, which are respectively arranged on both sides of the upper cutter 52 along the x direction. The clamping mechanism 80 includes a spring 81 connected to the lower end of the upper mold base 56, a pressing seat 82 connected to the lower end of the spring 81, and two pressure strips 83 respectively arranged on both sides of the bottom of the pressing seat 82 along the y direction. The position of the two pressure strips 83 along the y direction is adjustable, and a second avoidance groove for the pressure strip 83 to be pressed into is provided on the second pressure plate 513. By setting the clamping mechanism 80, when the upper mold base 56 is pressed down, the pressure strip 83 first contacts the lead frame 21 and presses the two ends of the lead frame 21 along the x direction to prevent the lead frame 21 from tilting and ensure the accuracy of cutting. After pressing, as the upper mold base 56 continues to be pressed down, the upper cutter 52 cuts the lead frame 21. The present application can achieve the action of first pressing and then cutting by setting the spring 81 under the buffering effect of the spring 81.

[0033] Please refer to Fig. 9 The lifting frame 62 of this embodiment is provided with a plurality of clamping mechanisms 90 for clamping the material box 63. The clamping mechanism 90 includes a bracket 91 fixed on the lifting frame 62, a third driving device 92 fixed on the bracket 91 and driven toward the inner side of the lifting frame 62, and a pressure pad 93 connected to the output end of the third driving device 92. The pressure pad 93 is used to press the material box 63 at the bottom of the inner side of the lifting frame 62. When the material box 63 at the bottom of the inner side of the lifting frame 62 is fully loaded, the first lifting driving device 64 continues to control the fully loaded material box 63 to move downward until the fully loaded material box 63 is placed on the two belts of the conveying device 65. At this time, the second empty material box inside the lifting frame 62 descends to the inner bottom of the lifting frame 62, and the third driving device 92 drives the pressure pad 93 to press the empty material box to prevent the empty material box from falling out of the lifting frame 62, and then the fully loaded material box 63 is conveyed out by the conveying device 65, thereby realizing automatic replacement of the material box 63, which has an ingenious structure.

[0034] For further information, please refer to Fig.10 The conveying device 65 is a double-belt conveying device 65. The output end of the first lifting drive device 64 is connected to a support plate 66. The support plate 66 can pass through the middle of the conveying device 65 along the z direction and then support the material box 63 at the bottom of the inner side of the lifting frame 62. The lifting and lowering of the material box 63 is controlled by the first lifting drive device 64 and the support plate 66 to realize stacked loading. The structure is simple and the loading efficiency is high.

[0035] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A lead frame cutting and collecting device, characterized in that: include: A base (10), wherein a mounting frame (11) and a processing table (12) are provided on the base (10); A material discharge mechanism (20) comprising a material tray (22) rotatably mounted on the mounting frame (11) and used for discharging the lead frame (21); A first feeding mechanism (30) comprises a first conveying track (31) fixed to the processing table (12) along the x-direction, and a first pressing plate (32) fixed to the upper end of the first conveying track (31), wherein a first feeding channel for conveying the lead frame (21) is formed between the first conveying track (31) and the first pressing plate (32), and the first pressing plate (32) is provided with a movable hole (321) extending along the x-direction; A material pulling mechanism (40), comprising a first insertion pin (41) movable in the movable hole (321) along the x-direction and extending into the first material feeding channel along the z-direction, wherein the first insertion pin (41) can pass through a side hole (23) of the lead frame (21); A cutting mechanism (50) comprising a lower die assembly (51) fixed to the processing table (12) and connected to the first conveying track (31), and an upper cutter (52) movable above the lower die assembly (51) along the z-direction, the lower die assembly (51) being provided with a second feeding channel for conveying the lead frame (21); The material receiving mechanism (60) comprises a second conveying track (61) connected to the discharge end of the second feeding channel, a lifting frame (62) arranged on one side of the discharge end of the second conveying track (61), a plurality of material boxes (63) movable along the z-direction on the lifting frame (62), a first lifting drive device (64) for controlling the lifting of the material boxes (63) along the z-direction, and a conveying device (65) arranged below the lifting frame (62) and used to transfer the material boxes (63).

2. The lead frame cutting and collecting device according to claim 1, characterized in that: A downwardly curved guide plate (33) is provided at one end of the first conveying track (31) facing the material tray (22), and a sensor (34) is provided below the guide plate (33). The sensor (34) is used to sense the lead frame (21) discharged from the material tray (22). The discharge mechanism (20) further comprises a servo motor fixed to the mounting frame (11) and used to control the discharge speed of the material tray (22).

3. The lead frame cutting and collecting device according to claim 1, characterized in that: The cutting and collecting device also includes an anti-retraction mechanism, which includes a first fixed seat (71) and a second fixed seat (72) respectively fixed to both sides of the upper end of the first conveying track (31) along the y direction, a first pressing block (73) movable along the z direction on the first fixed seat (71) and used to press the lead frame (21), and a second pressing block (74) movable along the z direction on the second fixed seat (72) and used to press the lead frame (21).

4. The lead frame cutting and collecting device according to claim 3, characterized in that: The upper end of the first pressing block (73) is connected to a first round-head pin (75), the upper end of the second pressing block (74) is connected to a second round-head pin (76), the first round-head pin (75) is hingedly connected to a swing arm (77), and the other end of the swing arm (77) can swing to engage with the second round-head pin (76).

5. The lead frame cutting and collecting device according to claim 1, characterized in that: The material pulling mechanism (40) further includes a first slide rail (42) fixed to the processing table (12) and extending along the x-direction, a first slider (43) sliding along the first slide rail (42), a first driving device (44) for driving the first slider (43), a sliding seat (45) fixed to the first slider (43), a second slider (46) capable of sliding along the x-direction on the sliding seat (45), a second driving device (47) fixed to the sliding seat (45) and capable of driving the second slider (46), and a lifting rod (48) driven by the second slider (46) and capable of being lifted and lowered along the z-direction, wherein the first pin (41) is fixed to the lifting rod (48), the second slider (46) is provided with a sliding groove (461) inclined upward along the x-direction, and the lifting rod (48) is connected to a connecting shaft (481), and the connecting shaft (481) moves in the sliding groove (461).

6. The lead frame cutting and collecting device according to claim 1, characterized in that: The lower die assembly (51) comprises a bottom plate (511) fixed to the upper end of the processing table (12), a third conveying track (512) fixed on the bottom plate (511), and a second pressing plate (513) fixed to the upper end of the third conveying track (512); the cutting mechanism (50) further comprises a column (53) fixed to the bottom plate (511), a top plate (54) fixed to the top end of the column (53), a second lifting drive device (55) fixed to the top plate (54), and an upper die seat (56) connected to the output end of the second lifting drive device (55); the upper cutter (52) is fixed to the lower end of the upper die seat (56); and the second pressing plate (513) is provided with a first avoidance groove (514) for the upper cutter (52) to be pressed into.

7. The lead frame cutting and collecting device according to claim 6, characterized in that: A cutting platform (515) cooperating with the upper cutter (52) is provided in the middle of the third conveying track (512); guide grooves (516) inclined downward are provided on both sides of the cutting platform (515) along the x-direction; and a debris discharge chute (517) penetrating downward through the bottom plate (511) is provided at the bottom of the guide groove (516).

8. The lead frame cutting and collecting device according to claim 6, characterized in that: A second plug pin (57) is also fixed to the lower end of the upper mold base (56), and a through hole (58) for the second plug pin (57) to pass through is provided on the second pressing plate (513), and the second plug pin (57) can pass through the side hole (23) of the lead frame (21).

9. The lead frame cutting and collecting device according to claim 6, characterized in that: A clamping mechanism (80) is also fixed to the lower end of the upper die seat (56), and the clamping mechanism (80) comprises a spring (81) connected to the lower end of the upper die seat (56), a pressing seat (82) connected to the lower end of the spring (81), and two pressure strips (83) respectively arranged on both sides of the bottom of the pressing seat (82) along the y direction, wherein the positions of the two pressure strips (83) along the y direction are adjustable, and a second avoidance groove for the pressure strip (83) to be pressed into is provided on the second pressing plate (513).

10. The lead frame cutting and collecting device according to claim 1, characterized in that: The lifting frame (62) is provided with a plurality of clamping mechanisms (90) for clamping the material box (63), the clamping mechanisms (90) comprising a bracket (91) fixed to the lifting frame (62), a third driving device (92) fixed to the bracket (91) and driven toward the inside of the lifting frame (62), and a pressure pad (93) connected to the output end of the third driving device (92), the pressure pad (93) being used to press the material box (63) at the bottom of the inner side of the lifting frame (62); The conveying device (65) is a double-belt conveying device (65), and the output end of the first lifting drive device (64) is connected to a support plate (66). The support plate (66) can pass through the middle of the conveying device (65) along the z-direction and then support the material box (63) at the bottom of the inner side of the lifting frame (62).

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