Lead frame slitting device and use method

Abstract

The invention aims to provide a lead frame slitting device and a use method, the device comprises a pay-off rack wound with a lead frame, and the device further comprises a wire outlet mechanism, a guide mechanism and a segment cutting mechanism. The guide mechanism can drive the pay-off rack and the wire outlet mechanism to rotate and adjust the wire outlet direction of the wire outlet mechanism; the section cutting mechanism comprises a rolling assembly, a section cutting assembly and a flattening assembly. And the discharging disc is arranged at the discharging end of the segment cutting mechanism and is used for bearing the lead frame which is cut into segments. The invention relates to the technical field of semiconductor lead frame processing. The lead frame slitting device can effectively solve the problems of distortion and breakage of a lead frame in a traditional device. The flatness of the lead frame can be improved, and the slitting effect is ensured; the production efficiency can be improved, and manual operation is reduced; the product quality can be further improved, and production requirements are met.

Description

Technical Field

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

[0002] In traditional lead frame slitting devices, the position of the pay-off frame is usually fixed, and the wire output direction cannot be adjusted according to actual needs. This design has some problems. First, since the position of the pay-off frame is fixed, the lead frame may be twisted when entering the cutting mechanism, which will cause the lead frame to break during the cutting process, affecting production efficiency and product quality. Secondly, the coiled lead frame is bent when being cut and is not easy to be cut, which also affects production efficiency and product quality. Therefore, the traditional lead frame slitting device has certain limitations in practical applications. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a lead frame cutting device and a use method, which solves the problem that the prior lead frame cutting device is not easy to be cut and processed.

[0004] To achieve the above object, the present invention is implemented by the following technical scheme: a lead frame cutting device, the lead frame cutting device includes a pay-off frame with a lead frame wound thereon, the lead frame cutting device also includes: a wire outlet mechanism, a guide mechanism, a segment cutting mechanism, a rolling assembly, a segment cutting assembly and a flattening assembly; The wire outlet mechanism is fixed to the wire outlet end of the pay-off frame; the guide mechanism is connected to the pay-off frame, and can drive the pay-off frame and the wire outlet mechanism to rotate, and adjust the wire outlet direction of the wire outlet mechanism; the lead frame passes through the segmentation mechanism; the segmentation mechanism includes: a rolling component that rolls the lead frame forward; a segmentation component that can segment the lead frame rolled and transported by the rolling component; and a flattening component that flattens the lead frame that enters the segmentation mechanism; The lead frame cutting device also includes a discharging tray, which is arranged at the discharging end of the cutting mechanism and receives the cut lead frames.

[0005] Preferably, the guide mechanism includes: an assembly plate, a first motor, a driven gear and a connecting seat; the assembly plate is fixed on a fixed object; the first motor is fixed on the assembly plate, and a driving gear is provided at the output end of the first motor; the driven gear is rotatably connected to the assembly plate and meshed with the driving gear; the connecting seat is fixed on the pay-off rack; and the driven gear is fixedly connected to the connecting seat.

[0006] Preferably, the wire outlet mechanism comprises: a lead housing, a guide wheel, a driving wheel, a driven wheel, an adjusting wheel and a pressing assembly; a first bottom receiving plate is fixed in the lead housing; the guide wheel is rotatably connected to the lead housing and is disposed on both sides of the first bottom receiving plate; the driving wheel and the driven wheel are disposed on both sides of the inner cavity of the lead housing; the adjusting wheel is rotatably connected to the upper middle part of the inner cavity of the lead housing, and the driving wheel, the driven wheel and the adjusting wheel are rotatably connected through a belt; the pressing assembly presses the belt between the driving wheel and the driven wheel; A second guide rail fixed to the lead housing is provided on the rear side of the adjusting wheel, a first slider is slidably connected to the second guide rail, the adjusting wheel is rotatably connected to the first slider, a second lifting mechanism is fixed to the lead housing, and an output end of the second lifting mechanism is fixedly connected to the first slider.

[0007] Preferably, a first guide rail fixed to the lead housing is provided at the rear side of the driven wheel, a second slider is slidably connected to the first guide rail, a baffle is provided at one end of the first guide rail, and the second slider is connected to the baffle via a spring.

[0008] Preferably, the pressing assembly includes: a first lifting mechanism, a connecting frame, a first pressure plate, an extended pressure plate and a connecting rod; the first lifting mechanism is fixedly connected to the lead housing; the connecting frame is fixed to the output end of the first lifting mechanism, and the inner side of the connecting frame is provided with a cavity for the belt to pass through; the first pressure plate is fixed to the bottom of the connecting frame and is close to the belt between the driving wheel and the driven wheel; the extended pressure plate is inserted into the insertion cavity on the side of the first pressure plate; the connecting rod is connected between the extended pressure plate and the second slider.

[0009] Preferably, the segment cutting mechanism also includes a segment cutting frame, in which a second bottom supporting plate is arranged; a support frame is suspended on the top of the second bottom supporting plate, and the support frame includes an upper connecting plate and a lower connecting plate; a fourth lifting mechanism is fixed on the segment cutting frame, and the output end of the fourth lifting mechanism is fixedly connected to the upper connecting plate; the rolling assembly, the segment cutting assembly and the flattening assembly are all arranged on the support frame.

[0010] Preferably, the rolling assembly includes: a linkage plate, a sixth lifting mechanism, a second motor, an active pressure roller and a plurality of driven pressure rollers; the linkage plate is embedded in the lower connecting plate; the sixth lifting mechanism is fixed to the upper connecting plate, and the output end is fixedly connected to the linkage plate; the second motor is fixed to the side wall of the linkage plate; the active pressure roller is rotatably connected to the side wall of the linkage plate, and is rotatably connected to the output end of the second motor through a connecting belt; a plurality of driven pressure rollers are rotatably connected to the side wall of the linkage plate, and are arranged in parallel with the active pressure roller.

[0011] Preferably, the segment cutting assembly includes a fifth lifting mechanism, the fifth lifting mechanism is fixed on the upper connecting plate, and a cutting head is fixed on the output end; and a notch matching the cutting head is opened on the lower connecting plate.

[0012] Preferably, the flattening assembly includes: a second pressing plate and a third lifting mechanism; the second pressing plate is embedded in the lower connecting plate; the third lifting mechanism is fixed on the upper connecting plate, and the output end is fixedly connected to the second pressing plate.

[0013] The present invention also provides a method for using a lead frame cutting device, comprising the following steps: S1, the first motor drives the driving gear and the driven gear to rotate so that the connecting seat and the pay-off frame swing, and adjusts the angles of the pay-off frame and the lead-out mechanism so that the lead frame is led out and introduced into the cutting mechanism in a straight line; S2, the lead frame led out from the pay-off frame enters the lead-out mechanism, and the first pressing plate pressed downward drives the belt to deform downward and press on the lead frame to shape it; S3, the second lifting mechanism drives the first slider to slide on the second guide rail, so that the adjusting wheel moves upward or downward, at which time the tension of the connecting belt changes, and the spring retracts or advances according to the change of tension, driving the second slider to slide on the first guide rail, driving the driven wheel to change the lateral position, and then adjusting the tension of the connecting belt; the second slider drives the connecting rod to pull the extension pressure plate to retract in the insertion cavity, and the extension pressure plate extends the use length of the first pressure plate; S4, the lead frame is introduced into the cutting frame and overlapped on the second bottom receiving plate, and the fourth lifting mechanism advances to drive the support frame to descend, so that the active pressure roller and the driven pressure roller are pressed on the lead frame; S5. The active pressing roller is driven to rotate by the second motor, and the lead frame is pressed to move toward the discharge tray; the third lifting mechanism drives the second pressing plate to press down to flatten and fix the lead frame; the fifth lifting mechanism drives the cutting blade to descend to cut the lead frame.

[0014] Beneficial effects:

[0015] By using the lead frame slitting device and the use method provided by the present invention, a wire outlet mechanism is provided at the wire outlet end of the pay-off frame, which can guide and flatten the lead frame and automatically adjust the use length of the belt. This design can effectively solve the problem of lead frame distortion and breakage in traditional devices, and improve production efficiency and product quality.

[0016] At the same time, the present invention can also adjust the use length of the first pressing plate and the extension pressing plate, and realize the flattening work of the lead frame while assisting the gap. This design can further improve the flatness of the lead frame and ensure the slitting effect.

[0017] In addition, during the slitting process, the segmenting mechanism can also transport the cut lead frame through the roller pressing assembly and can also drive the movement of the lead frame. This design can improve production efficiency and reduce manual operations.

[0018] Finally, before cutting, the lead frame is pressed by the second pressing plate, which can not only level the lead frame but also fix the lead frame to ensure the cutting effect. This design can further improve product quality and meet production needs.

[0019] In general, the lead frame slitting device of the present invention can effectively solve the problems of lead frame distortion and breakage in traditional devices; can improve the flatness of the lead frame and ensure the slitting effect; can improve production efficiency and reduce manual operations; can further improve product quality and meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is the front view of the outlet mechanism of the present invention.

[0022] Figure 3 It is a schematic diagram of the connection frame structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the connection structure between the extension pressing plate and the first pressing plate of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the segment cutting mechanism of the present invention.

[0025] Figure 6 It is a three-dimensional schematic diagram of the internal structure of the segment cutting mechanism of the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the linkage plate of the present invention.

[0027] Explanation of symbols in the figure: 1. assembly plate; 2. first motor; 3. driving gear; 4. driven gear; 5. connecting seat; 6. wire pay-off frame; 7. wire outlet mechanism; 71. lead housing; 72. driving wheel; 73. driven wheel; 74. adjusting wheel; 75. first lifting mechanism; 76. second lifting mechanism; 77. belt; 78. first slider; 79. first guide rail; 710. guide wheel; 711. first pressure plate; 712. connecting frame; 713. second guide rail; 714. baffle; 715. extension pressure plate; 716. first bottom receiving plate; 71 7. Receiving cavity; 718. Inserting cavity; 719. Spring; 720. Second slider; 721. Connecting rod; 8. Lead frame; 9. Segment cutting mechanism; 91. Segment cutting frame; 92. Third lifting mechanism; 93. Fourth lifting mechanism; 94. Fifth lifting mechanism; 95. Sixth lifting mechanism; 96. Upper connecting plate; 97. Lower connecting plate; 98. Second pressing plate; 99. Second bottom receiving plate; 910. Cutting blade; 911. Interlocking plate; 912. Second motor; 913. Connecting belt; 914. Active pressure roller; 915. Driven pressure roller; 10. Discharging tray. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. As long as the effects of the present invention can be exerted, various changes can be made to the implementation scheme.

[0029] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0030] Reference Figure 1-7 A lead frame slitting apparatus according to the present embodiment will be described.

[0031] like Figure 1 As shown, it includes a coiled wire pay-off frame 6 wound with a lead frame 8. It also includes a wire outlet mechanism 7, a guide mechanism, a segment cutting mechanism 9 and a discharge tray 10. Among them, the wire outlet mechanism 7 is fixed to the wire outlet end of the wire pay-off frame 6 to assist the wire outlet work of the coiled lead frame 8 in the wire pay-off frame 6; the guide mechanism is connected to the wire pay-off frame 6, and can drive the wire pay-off frame 6 and the wire outlet mechanism 7 to rotate, and adjust the wire outlet direction of the wire outlet mechanism 7.

[0032] like Figure 1As shown, the guide mechanism includes an assembly plate 1, a first motor 2, a driven gear 4 and a connecting seat 5. The assembly plate 1 is fixed on a fixed object; the first motor 2 is fixed on the assembly plate 1, and a driving gear 3 is provided at the output end of the first motor 2; the driven gear 4 is rotatably connected to the assembly plate 1, and meshed with the driving gear 3; the connecting seat 5 is fixed on the pay-off frame 6; the driven gear 4 is fixedly connected to the connecting seat 5. When in use, the first motor 2 drives the driving gear 3 to drive the driven gear 4 to rotate, and the driven gear 4 drives the connecting seat 5 and the pay-off frame 6 to rotate, thereby adjusting the outlet direction of the pay-off frame 6 and the outlet mechanism 7. Make the outlet mechanism 7 and the segmentation mechanism 9 straight, ensure that the lead frame 8 enters the segmentation mechanism 9 in a straight line, and prevent the lead frame 8 from entering the segmentation mechanism 9 in a twisted state and causing it to break.

[0033] like Figure 2 As shown, the lead-out mechanism 7 includes a lead-out housing 71 , a guide wheel 710 , a pressing assembly, a driving wheel 72 , a driven wheel 73 and an adjusting wheel 74 .

[0034] A first bottom receiving plate 716 is fixed inside the lead housing 71; the guide wheel 710 is rotatably connected to the lead housing 71 and is disposed on both sides of the first bottom receiving plate 716; the driving wheel 72 and the driven wheel 73 are disposed on both sides of the inner cavity of the lead housing 71; the adjusting wheel 74 is rotatably connected to the upper middle part of the inner cavity of the lead housing 71, and the driving wheel 72, the driven wheel 73 and the adjusting wheel 74 are rotatably connected through a belt 77; the driving wheel 72 is connected to a servo motor and can drive the driving wheel 72 to rotate. When the driving wheel 72 rotates, the driven wheel 73 and the adjusting wheel 74 are driven to rotate synchronously through the belt 77. The lead frame 8 is overlapped on the first bottom receiving plate 716, and the rotating belt 77 contacts the lead frame 8, driving the lead frame 8 to move outward through friction.

[0035] A first guide rail 79 fixed to the lead housing 71 is disposed at the rear side of the driven wheel 73 , a second slider 720 is slidably connected to the first guide rail 79 , a baffle 714 is disposed at one end of the first guide rail 79 , and the second slider 720 is connected to the baffle 714 via a spring 719 .

[0036] A second guide rail 713 fixed to the lead housing 71 is provided on the rear side of the adjusting wheel 74, a first slider 78 is slidably connected to the second guide rail 713, the adjusting wheel 74 is rotatably connected to the first slider 78, a second lifting mechanism 76 is fixed to the lead housing 71, and an output end of the second lifting mechanism 76 is fixedly connected to the first slider 78.

[0037] The pressing assembly presses the belt 77 between the driving wheel 72 and the driven wheel 73 ; the pressing assembly includes a first lifting mechanism 75 , a connecting frame 712 , a first pressing plate 711 , an extending pressing plate 715 and a connecting rod 721 .

[0038] The first lifting mechanism 75 is fixedly connected to the lead housing 71; the connecting frame 712 is fixed at the output end of the first lifting mechanism 75, and a cavity 717 is provided on the inner side of the connecting frame 712 for the belt 77 to pass through; the connecting frame 712 is fixed at the output end of the first lifting mechanism 75, and a cavity 717 is provided on the inner side of the connecting frame 712 for the belt 77 to pass through; the extending pressure plate 715 is inserted into the insertion cavity 718 on the side of the first pressure plate 711; the connecting rod 721 is connected between the extending pressure plate 715 and the second slider 720.

[0039] During operation, the second lifting mechanism 76 drives the first slider 78 to slide on the second guide rail 713, so that the adjusting wheel 74 moves upward or downward. At this time, the tension of the connecting belt 913 changes, and the spring 719 retracts or advances according to the change in tension, driving the second slider 720 to slide on the first guide rail 79, driving the driven wheel 73 to change the lateral position, and then adjusting the tension of the connecting belt 913; the second slider 720 drives the connecting rod 721 to pull the extension pressure plate 715 to retract in the insertion cavity 718, and the extension pressure plate 715 extends the use length of the first pressure plate 711; the first lifting mechanism 75 advances to work, driving the first pressure plate 711 and the extension pressure plate 715 to descend synchronously, and the synchronous pressing belt 77 to descend, adjust the gap between the belt 77 and the first bottom supporting plate 716, and then adjust the pre-pressure of the belt 77 pressing down the lead frame 8. Moreover, when the driving wheel 72 works intermittently, the belt 77 also works intermittently. At this time, the first pressing plate 711 and the extending pressing plate 715 continue to descend and can be pressed on the lead frame 8 to flatten the lead frame 8 so that the lead frame 8 can be led out in a flat shape.

[0040] The discharge tray 10 is arranged at the discharge end of the segmentation mechanism 9 to receive the segmented lead frame 8. The lead frame 8 passes through the segmentation mechanism 9. The segmentation mechanism 9 includes a rolling assembly, a segmentation assembly and a flattening assembly. The rolling assembly rolls the lead frame 8 forward; the segmentation assembly can segment the lead frame 8 rolled and conveyed by the rolling assembly; the flattening assembly flattens the lead frame 8 entering the segmentation mechanism 9.

[0041] The segment cutting mechanism 9 also includes a segment cutting frame 91, in which a second bottom receiving plate 99 is arranged; a support frame is suspended on the top of the second bottom receiving plate 99, and the support frame includes an upper connecting plate 96 and a lower connecting plate 97. A fourth lifting mechanism 93 is fixed on the segment cutting frame 91, and an output end of the fourth lifting mechanism 93 is fixedly connected to the upper connecting plate 96; The rolling assembly, the segment cutting assembly and the flattening assembly are all arranged on the supporting frame.

[0042] The rolling assembly includes a linkage plate 911, a sixth lifting mechanism 95, a second motor 912, an active pressure roller 914 and a plurality of driven pressure rollers 915. The linkage plate 911 is embedded in the lower connecting plate 97; the sixth lifting mechanism 95 is fixed on the upper connecting plate 96, and the output end is fixedly connected to the linkage plate 911; the second motor 912 is fixed on the side wall of the linkage plate 911; the active pressure roller 914 is rotatably connected to the side wall of the linkage plate 911, and is rotatably connected to the output end of the second motor 912 through a connecting belt 913; a plurality of driven pressure rollers 915 are rotatably connected to the side wall of the linkage plate 911, and are arranged in parallel with the active pressure roller 914, and the active pressure roller 914 and each driven pressure roller 915 are connected through a connecting belt.

[0043] The lead frame 8 is introduced into the cutting frame 91 and overlapped on the second bottom receiving plate 99 . The fourth lifting mechanism 93 advances to drive the support frame downward, so that the active pressure roller 914 and the driven pressure roller 915 are pressed onto the lead frame 8 .

[0044] The segment cutting assembly includes a fifth lifting mechanism 94 , which is fixed on the upper connecting plate 96 , and a cutting blade 910 is fixed on the output end; a notch matching the cutting blade 910 is opened on the lower connecting plate 97 .

[0045] The flattening assembly includes a second pressing plate 98 and a third lifting mechanism 92. The second pressing plate 98 is embedded in the lower connecting plate 97; the third lifting mechanism 92 is fixed on the upper connecting plate 96, and the output end is fixedly connected to the second pressing plate 98.

[0046] Furthermore, the active pressing roller 914 is driven to rotate by the second motor 912, and the rolled lead frame 8 moves toward the discharge tray 10; the third lifting mechanism 92 drives the second pressing plate 98 to press down to flatten and fix the lead frame 8; the fifth lifting mechanism 94 advances to drive the cutting head 910 to descend to cut the lead frame 8.

[0047] In the lead frame cutting method of this embodiment, the lead frame cutting device described above is used, and the method comprises the following steps: S1, the first motor 2 drives the driving gear 3 and the driven gear 4 to rotate so that the connecting seat 5 and the pay-off frame 6 swing, and the angles of the pay-off frame 6 and the lead-out mechanism 7 are adjusted so that the lead frame 8 is led out and introduced into the cutting mechanism 9 in a straight line; S2, the lead frame 8 led out from the pay-off frame 6 enters the lead-out mechanism 7, and the first pressing plate 711 pressed downward drives the belt 77 to deform downward and press on the lead frame 8 to shape it; S3, the second lifting mechanism 76 drives the first slider 78 to slide on the second guide rail 713, so that the adjusting wheel 74 moves upward or downward. At this time, the tension of the connecting belt 913 changes, and the spring 719 retracts or advances according to the change of tension, driving the second slider 720 to slide on the first guide rail 79, driving the driven wheel 73 to change the lateral position, and then adjusting the tension of the connecting belt 913; the second slider 720 drives the connecting rod 721 to pull the extension plate 715 to retract in the insertion cavity 718, and the extension plate 715 extends the use length of the first plate 711; S4, the lead frame 8 is introduced into the cutting frame 91 and overlapped on the second bottom receiving plate 99, and the fourth lifting mechanism 93 advances to drive the support frame to descend, so that the active pressure roller 914 and the driven pressure roller 915 are pressed on the lead frame 8; S5. The active pressing roller 914 is driven to rotate by the second motor 912, and the rolled lead frame 8 moves toward the discharge tray 10; the third lifting mechanism 92 drives the second pressing plate 98 to press down to flatten and fix the lead frame 8; the fifth lifting mechanism 94 drives the cutting blade 910 to descend to cut the lead frame 8.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lead frame cutting device, comprising a pay-off frame (6) wound with a lead frame (8), characterized in that: The lead frame cutting device further comprises: A wire outlet mechanism (7) fixed to the wire outlet end of the pay-off frame (6); A guide mechanism connected to the pay-off frame (6) and capable of driving the pay-off frame (6) and the wire outlet mechanism (7) to rotate, thereby adjusting the wire outlet direction of the wire outlet mechanism (7); A cutting mechanism (9), the lead frame (8) passes through the cutting mechanism (9); the cutting mechanism (9) comprises: A rolling assembly for rolling the lead frame (8) and conveying it forward; A cutting assembly capable of cutting into segments the lead frame (8) rolled and conveyed by the rolling assembly; A flattening component is used to flatten the lead frame (8) that has entered the cutting mechanism (9); The lead frame slitting device also includes a discharging tray (10) which is arranged at the discharging end of the segmenting mechanism (9) and receives the segmented lead frame (8).

2. A lead frame cutting device according to claim 1, characterized in that: The guiding mechanism comprises: An assembly plate (1) is fixed on a fixed object; A first motor (2) is fixed on the assembly plate (1), and a driving gear (3) is provided at the output end of the first motor (2); A driven gear (4) is rotatably connected to the assembly plate (1) and meshingly connected to the driving gear (3); The connecting seat (5) is fixed on the pay-off frame (6); the driven gear (4) is fixedly connected to the connecting seat (5).

3. A lead frame cutting device according to claim 2, characterized in that: The outlet mechanism (7) comprises: A lead housing (71), wherein a first bottom receiving plate (716) is fixed inside the lead housing (71); Guide wheels (710) rotatably connected to the lead housing (71) and disposed on both sides of the first bottom receiving plate (716); a driving wheel (72), a driven wheel (73) and an adjusting wheel (74), wherein the driving wheel (72) and the driven wheel (73) are respectively arranged on both sides of the inner cavity of the lead housing (71); the adjusting wheel (74) is rotatably connected to the upper middle portion of the inner cavity of the lead housing (71); the driving wheel (72), the driven wheel (73) and the adjusting wheel (74) are rotatably connected via a belt (77); A pressing assembly to press the belt (77) between the driving wheel (72) and the driven wheel (73); A second guide rail (713) fixed to the lead housing (71) is arranged at the rear side of the adjusting wheel (74); a first slider (78) is slidably connected to the second guide rail (713); the adjusting wheel (74) is rotatably connected to the first slider (78); a second lifting mechanism (76) is fixed to the lead housing (71); an output end of the second lifting mechanism (76) is fixedly connected to the first slider (78).

4. A lead frame cutting device according to claim 3, characterized in that: A first guide rail (79) fixed to the lead housing (71) is provided at the rear side of the driven wheel (73); a second slider (720) is slidably connected to the first guide rail (79); a baffle (714) is provided at one end of the first guide rail (79); and the second slider (720) is connected to the baffle (714) via a spring (719).

5. The lead frame cutting device according to claim 4, characterized in that: The pressing assembly comprises: A first lifting mechanism (75) is fixedly connected to the lead housing (71); A connecting frame (712) is fixed to the output end of the first lifting mechanism (75), and a cavity (717) is provided on the inner side of the connecting frame (712) for the belt (77) to pass through; A first pressing plate (711) is fixed to the bottom of the connecting frame (712) and is close to the belt (77) between the driving wheel (72) and the driven wheel (73); An extended pressing plate (715) is inserted into an inserting cavity (718) on a side of the first pressing plate (711); The connecting rod (721) is connected between the extending pressing plate (715) and the second sliding block (720).

6. The lead frame cutting device according to claim 5, characterized in that: The segment cutting mechanism (9) further comprises a segment cutting frame (91), wherein a second bottom receiving plate (99) is arranged in the segment cutting frame (91); a support frame is suspended on the top of the second bottom receiving plate (99), wherein the support frame comprises an upper connecting plate (96) and a lower connecting plate (97); a fourth lifting mechanism (93) is fixed on the segment cutting frame (91), and an output end of the fourth lifting mechanism (93) is fixedly connected to the upper connecting plate (96); The rolling assembly, the segmenting assembly and the flattening assembly are all arranged on a supporting frame.

7. The lead frame cutting device according to claim 6, characterized in that: The rolling assembly comprises: A linkage plate (911) embedded in the lower connection plate (97); A sixth lifting mechanism (95) is fixed on the upper connecting plate (96), and an output end is fixedly connected to the connecting plate (911); A second motor (912) is fixed on a side wall of the linkage plate (911); an active pressure roller (914) rotatably connected to the side wall of the linkage plate (911) and rotatably connected to the output end of the second motor (912) via a connecting belt (913); A plurality of driven pressure rollers (915) are rotatably connected to the side wall of the linkage plate (911) and are arranged in parallel with the active pressure rollers (914).

8. The lead frame cutting device according to claim 7, characterized in that: The cutting assembly comprises a fifth lifting mechanism (94), the fifth lifting mechanism (94) being fixed on the upper connecting plate (96), and a cutting blade head (910) being fixed on the output end; a notch matching the cutting blade head (910) is formed on the lower connecting plate (97).

9. The lead frame cutting device according to claim 8, characterized in that: The flattening assembly comprises: A second pressing plate (98) embedded in the lower connecting plate (97); The third lifting mechanism (92) is fixed on the upper connecting plate (96), and the output end is fixedly connected to the second pressing plate (98).

10. A method for using a lead frame cutting device, using the lead frame cutting device according to claim 9, characterized in that: The steps include: S1, the first motor (2) drives the driving gear (3) and the driven gear (4) to rotate so that the connecting seat (5) and the pay-off frame (6) swing, and the angle of the pay-off frame (6) and the lead-out mechanism (7) is adjusted so that the lead frame (8) is led out and introduced into the cutting mechanism (9) in a straight line; S2, the lead frame (8) led out from the pay-off frame (6) enters the lead-out mechanism (7), and the first pressing plate (711) pressed downward drives the belt (77) to deform downward and press onto the lead frame (8) to shape it; S3, the second lifting mechanism (76) drives the first slider (78) to slide on the second guide rail (713), so that the adjusting wheel (74) moves upward or downward. At this time, the tension of the connecting belt (913) changes, and the spring (719) retracts or advances according to the change in tension, driving the second slider (720) to slide on the first guide rail (79), driving the driven wheel (73) to change its lateral position, thereby adjusting the tension of the connecting belt (913); the second slider (720) drives the connecting rod (721) to pull the extension pressure plate (715) to retract in the insertion cavity (718), and the extension pressure plate (715) extends the use length of the first pressure plate (711); S4, the lead frame (8) is introduced into the cutting frame (91) and overlapped on the second bottom receiving plate (99), and the fourth lifting mechanism (93) is driven to drive the support frame downward, so that the active pressure roller (914) and the driven pressure roller (915) are pressed onto the lead frame (8); S5. The active pressing roller (914) is driven to rotate by the second motor (912), and the lead frame (8) is pressed to move toward the discharge tray (10); the third lifting mechanism (92) drives the second pressing plate (98) to press down to make the lead frame (8) flat and fixed; the fifth lifting mechanism (94) drives the cutting blade (910) to descend to cut the lead frame (8).

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