Lead frame slitting device and slitting method

Abstract

The invention relates to the technical field of lead frame slitting devices, in particular to a lead frame slitting device and method. Comprising a mounting plate, the mounting plate is fixedly connected with a cutting table, the mounting plate is fixedly connected with symmetrically-distributed fixing columns, the mounting plate is provided with a winding roll, a lead frame roll is wound on the winding roll, the symmetrically-distributed fixing columns are jointly connected with a cutting knife in a sliding mode, one fixing column is connected with a first motor in a sliding mode, and the other fixing column is connected with a second motor in a sliding mode. And an output shaft of the first motor is fixedly connected with a cam, the fixing column is rotationally connected with a connecting rod, and the end, away from the cutting knife, of the connecting rod is fixedly connected with a transmission wheel. The thickness of the lead frame is detected, then the position of the first motor is adjusted, the transmission ratio between the cam and the transmission wheel is changed, the downward moving speed of the cutting knife can be adjusted along with the thickness of the lead frame, and abrasion of the cutting knife in the cutting process is reduced.

Description

Technical Field

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

[0002] The production process of lead frames usually includes material selection, stamping, testing, electroplating, slitting, packaging, etc. In general, the raw materials for the preparation of lead frames are thin metal sheets in roll form, which is convenient for continuous stamping or electroplating. After stamping or electroplating, in order to facilitate the subsequent slitting stage, the stamped lead frame is also temporarily stored in a roll state, and then pulled out from the roll state and transported to the cutting device for slitting.

[0003] At present, in the process of slitting the lead frame, when cutting lead frames of different thicknesses, the initial feed speed of the cutting device is the same. If the feed speed of the cutting device remains unchanged during the subsequent cutting process, when cutting a thinner lead frame, the lead frame is likely to rebound at the cutting edge, affecting the cutting accuracy. When cutting a thicker lead frame, the pressure fed back by the lead frame to the cutting device will also increase, which is likely to accelerate the wear rate of the cutting knife and reduce the service life of the cutting knife. It will also affect the cutting speed and overall cutting quality of the cutting device, resulting in the quality of the slit lead frame being affected. Summary of the invention

[0004] In order to overcome the disadvantage that the quality of the lead frame after slitting is easily affected by the tool feeding speed during the current process of slitting the lead frame, the purpose of the present invention is to provide a lead frame slitting device and a slitting method.

[0005] The technical solution is: a lead frame slitting device, comprising a mounting plate, a cutting table is fixedly connected to the upper side of the mounting plate, symmetrically distributed fixing columns are fixedly connected to the upper side of the mounting plate, the symmetrically distributed fixing columns are located on both sides of the cutting table, a winding roll is arranged on one side of the mounting plate, a lead frame roll is wound on the winding roll, the lead frames on the winding roll are all provided with rectangular array positioning holes, a symmetrically distributed connecting column is fixedly connected to one side of the mounting plate close to the winding roll, the symmetrically distributed connecting columns are all provided with connecting blocks, the symmetrically distributed connecting columns are connected to a guide shaft through the adjacent connecting blocks for common rotation, and the lead frame bypasses the guide shaft to pass through the guide shaft. Toward the axis, a guiding device is provided on the upper side of the mounting plate, the symmetrically distributed fixing columns are slidably connected to the cutting knife, the cutting table is provided with a groove matching the cutting knife, one of the fixing columns is slidably connected to the first motor, the output shaft of the first motor is fixedly connected to a cam, the fixing column is rotatably connected to a connecting rod, the connecting rod is threadedly matched with the cutting knife, the end of the connecting rod away from the cutting knife is fixedly connected to a transmission wheel, the transmission wheel is frictionally matched with the cam, a trigger mechanism for changing the position of the first motor is provided on the upper side of the mounting plate, and a transport mechanism for conveying the lead frame is provided on the upper side of the mounting plate.

[0006] As an improvement on the above scheme, the trigger mechanism includes a second motor, which is fixedly connected to a side of the mounting plate away from the first motor, and a transmission rod is rotatably connected to a side of the mounting plate close to the second motor. The transmission rod and the output shaft of the first motor are transmitted through a gear set, and a pressure cover is threadedly connected to the transmission rod, and the pressure cover is slidably connected to the mounting plate. A liquid storage ring is fixedly connected to a side of the mounting plate close to the first motor, and a moving ring fixed to the pressure cover is slidably connected in the liquid storage ring. The fixed column slidably connected to the first motor is fixedly connected to a hydraulic telescopic rod, and the telescopic end of the hydraulic telescopic rod is fixedly connected to the first motor, and the liquid storage ring is fixedly connected to and communicated with a connecting pipe fixedly connected to and communicated with the hydraulic telescopic rod.

[0007] As an improvement on the above scheme, the transportation mechanism includes an electric telescopic frame, which is installed on the upper side of the mounting plate, and a moving plate is installed on the upper side of the electric telescopic frame, a third motor is fixedly connected to one side of the moving plate, a first moving block and a second moving block are slidably connected to the upper side of the moving plate, a first elastic member is fixedly connected between the first moving block and the second moving block, a threaded rod is rotatably connected to the upper side of the moving plate, the threaded rod is fixedly connected to the output shaft of the third motor, the threaded rod passes through the second moving block, and the threaded rod is threadedly matched with the first moving block, and a fixed plate is provided on the upper side of the first moving block and the upper side of the second moving block, wherein the first moving block is fixedly connected to the adjacent fixed plate, and symmetrically distributed positioning rods are fixedly connected to the upper side of the fixed plate through a connecting member, and the positioning rods are slidably matched with the positioning holes of the lead frame, the cutting table is provided with symmetrically distributed slide grooves, and the positioning rods slide in adjacent slide grooves on the cutting table, and a support assembly is provided on the fixed plate, and the support assembly is used to fix the lead frame and the adjacent positioning rods.

[0008] As an improvement of the above solution, the distance between the positioning rods on the same side of the two fixing plates is the same as the distance between non-adjacent positioning holes on the same side of adjacent lead frames.

[0009] As an improvement on the above scheme, the supporting assembly includes a dual-axis motor, which is fixedly connected to a side of an adjacent fixed plate away from the movable plate, the positioning rod is provided with a through hole, a connecting sleeve is rotatably connected in the through hole of the positioning rod, the connecting sleeve and the adjacent output shaft on the adjacent dual-axis motor are transmitted through a gear set, the connecting sleeve is threadedly connected to a movable rod, one end of the movable rod away from the adjacent fixed plate is fixedly connected to a conical block, and a side of the positioning rod away from the adjacent fixed plate is limitedly and slidably connected to a support block evenly distributed in the circumference, the support block is slidably connected to the adjacent conical block, and the support block is extruded and fitted with the adjacent conical block, and a limiting component is provided on one side of the movable plate, and the limiting component is used to fix the second movable block.

[0010] As an improvement of the above scheme, the thread on the connecting sleeve is an internal thread, the diameter of the positioning rod through hole is larger than the major diameter of the threaded portion on the moving rod, and the height of the connecting sleeve, the height of the thread on the positioning rod and the height of the conical block are all equal.

[0011] As an improvement on the above scheme, the limiting component includes a connecting shell, which is fixedly connected to one side of the movable plate through a connecting member, and the connecting shell is internally slidably connected to a limiting block, and an inclined surface is provided on the side of the limiting block away from the winding roll, and the limiting block is extruded and matched with the first movable block, and a second elastic member is fixedly connected between the limiting block and the connecting shell, and a limiting groove that is limited and matched with the limiting block is provided on the side of the second movable block close to the connecting shell, and an inclined surface that is extruded and matched with the limiting block is provided on the side of the second movable block close to the connecting shell and on the side of the inclined groove on the connecting shell close to the first movable block.

[0012] As an improvement of the above solution, the upper inclined surface of the limit block and the upper inclined surface of the second moving block are symmetrically distributed, and the inclined surface in the limit groove of the second moving block has the same inclination direction as the upper inclined surface of the limit block.

[0013] As an improvement on the above scheme, it also includes an adjusting mechanism, which is used to change the position of the guide shaft, and the adjusting mechanism is arranged on the upper side of the second moving block, and the adjusting mechanism includes a liquid storage shell, which is fixedly connected to the side of the second moving block away from the moving plate, the second moving block is slidably connected to the adjacent fixed plate, an extrusion block is slidably connected in the liquid storage shell, the extrusion block is fixedly connected to the adjacent fixed plate, a third elastic member is fixedly connected between the second moving block and the adjacent fixed plate, a liquid storage tube is inlaid on one side of the mounting plate, a push plate is slidably connected to the inside of the liquid storage tube, a fixing rod is fixedly connected to the upper side of the push plate, the fixing rod is fixedly connected to the adjacent connecting block on one of the connecting columns, and the symmetrically distributed connecting columns are slidably connected to the adjacent connecting blocks respectively.

[0014] A lead frame cutting method and a lead frame cutting device based on the above technical solution include the following steps: S1: Move the pre-treated winding roll to the right side of the cutting table, pass one end of the lead frame on the winding roll around the guide shaft and the guide device on the mounting plate, and move the two leftmost positioning holes of the lead frame to above the adjacent positioning rods on the left side; S2: The control terminal starts the electric telescopic frame, and the electric telescopic frame drives the two right positioning rods to move upward synchronously through the transmission of other parts connected thereto, until the two right positioning rods extend into adjacent positioning holes on adjacent lead frames, and the electric telescopic frame is shut down; S3: When the electric telescopic frame moves upward to the limit position, the control terminal starts the double-axis motor on the right side, and the double-axis motor drives the two adjacent groups of support blocks to open, and the two groups of support blocks fix the adjacent lead frames, and the double-axis motor on the right side is turned off; S4: After the adjacent lead frames are fixed, the control terminal starts the third motor, and the third motor drives the adjacent fixing plates to move synchronously through the threaded rod, the first moving block, the two first elastic members, and the second moving block. The fixing plates move the adjacent lead frames to the cutting position through the transmission of the two adjacent positioning rods, and then the third motor is turned off; S5: After the lead frame is moved to the cutting position, the control terminal starts the second motor, and the output shaft of the second motor drives the pressure cover to move downward through the transmission of the spur gear set and the transmission rod, and the pressure cover and the cutting table cooperate with each other to clamp and flatten the adjacent lead frames, and then the second motor is turned off; S6: After the lead frame is fixed, the control terminal starts the double-axis motor and the electric telescopic frame on the right side in reverse order, so that the two sets of support blocks and the moving plate and other parts connected thereto are reset to the initial positions, and then the double-axis motor and the electric telescopic frame on the right side are shut down in order; S7: After the movable plate is reset to the initial position, the control terminal starts the first motor, and the output shaft of the first motor drives the cutting knife to move downward through the cam, the transmission wheel and the connecting rod, and the cutting knife cuts the connection between two adjacent lead frames to cut off the lead frame; S8: After the lead frame is cut, the control terminal starts the first motor and the second motor in reverse order, and resets the cutting knife and the pressure cover to the initial position in turn. Then the control terminal starts the electric telescopic frame again, and repeats the above steps to transport the cut lead frame to the next operation process. At the same time, the next lead frame to be cut is transported to the cutting position, and the cutting knife cuts the remaining lead frame.

[0015] The present invention has at least the following beneficial effects: 1. The present invention detects the thickness of the lead frame and then adjusts the position of the first motor, thereby changing the transmission ratio between the cam and the transmission wheel, so that the downward moving speed of the cutting knife can be adjusted according to the thickness of the lead frame, thereby reducing the wear of the cutting knife during the cutting process.

[0016] 2. The lead frame is clamped by the cooperation between the pressure cover and the cutting table, and the lead frame is flattened at the same time to ensure the flatness of the lead frame after cutting.

[0017] 3. By driving the lead frame to move on the positioning rod and pulling out the lead frame on the winding roll to supplement the cut lead frame, the accuracy of the lead frame positioning of the device is increased, which is conducive to ensuring the uniformity of the cutting size of the product, ensuring the stability of the product quality, and reducing the cutting scrap rate of the product.

[0018] 4. When the lead frame is reduced on the winding roll, the buffer part reserved between the guide device on the cutting table and the winding roll is released, so that the positioning rod can drive the lead frame to move normally, avoiding the positioning rod squeezing the positioning hole on the lead frame, causing the positioning hole on the lead frame to deform, resulting in damage to the quality of the lead frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the trigger mechanism of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the liquid storage ring and the moving ring of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the transportation mechanism of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the first moving block and the second moving block of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the connection relationship between the second moving block and the fixed plate of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the internal parts of the positioning rod of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the conical block and the supporting block of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the limiting component of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the liquid storage tube and the push plate of the present invention.

[0020] The reference numbers in the figure are: 1-mounting plate, 2-cutting table, 3-fixed column, 4-winding roll, 401-connecting column, 402-guide shaft, 5-cutting knife, 6-first motor, 7-cam, 8-connecting rod, 9-transmission wheel, 10-second motor, 11-transmission rod, 12-pressure cover, 13-liquid storage ring, 14-moving ring, 15-hydraulic telescopic rod, 20-electric telescopic frame, 21-moving plate, 22-third motor, 23- The first moving block, 24-the second moving block, 241-the first elastic member, 242-the threaded rod, 25-the fixed plate, 26-the positioning rod, 30-the dual-axis motor, 31-the connecting sleeve, 32-the moving rod, 33-the conical block, 34-the supporting block, 40-the connecting shell, 41-the limiting block, 42-the second elastic member, 50-the liquid storage shell, 51-the extrusion block, 52-the third elastic member, 53-the liquid storage tube, 54-the pushing plate, 55-the fixed rod. DETAILED DESCRIPTION

[0021] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0022] Embodiment 1: Considering that during the lead frame slitting process, when cutting a thicker lead frame, the pressure fed back by the lead frame to the cutting device will also increase. At this time, if the feed speed of the cutting device remains unchanged, the wear speed of the cutting device will be accelerated, resulting in a reduction in the service life of the cutting device. At the same time, it will also affect the cutting speed and the overall cutting quality of the cutting device, causing the quality of the slit lead frame to be affected.

[0023] A lead frame cutting device, please refer to Figure 1-Figure 3 Reading this paragraph, it includes a mounting plate 1, a control terminal is arranged on one side of the mounting plate 1, the control terminal is an existing device and is no longer shown in the figure, a cutting table 2 is fixedly connected to the upper side of the mounting plate 1, the cutting table 2 is used to place the lead frame, two fixing columns 3 symmetrically distributed front and back are fixedly connected to the upper side of the mounting plate 1, the two fixing columns 3 are respectively located on the front and back sides of the cutting table 2, a winding roll 4 is arranged on the right side of the mounting plate 1, a lead frame roll is wound on the winding roll 4, the lead frames on the winding roll 4 are all provided with four positioning holes in a rectangular array, two connecting columns 401 symmetrically distributed front and back are fixedly connected to the right side of the mounting plate 1, connecting blocks are arranged on the upper sides of the two connecting columns 401, the two connecting columns 401 are connected to a guide shaft 402 for common rotation through adjacent connecting blocks, the lead frame bypasses the guide shaft 402, a guiding device is arranged on the upper side of the mounting plate 1, the guiding device cooperates with the guide shaft 402 to guide the lead on the winding roll 4 The frame moves, the upper sides of the two fixed columns 3 are slidably connected with a cutting knife 5, the cutting table 2 is provided with a groove matched with the cutting knife 5, the cutting knife 5 is used to cut the lead frame pulled out from the winding roll 4, the fixed column 3 on the rear side is slidably connected with a first motor 6 electrically connected to the control terminal, the output shaft of the first motor 6 is fixedly connected with a cam 7, the fixed column 3 on the rear side is rotatably connected with a connecting rod 8, the connecting rod 8 is threadedly matched with the cutting knife 5, the connecting rod 8 drives the cutting knife 5 to move through the transmission of the thread, the lower end of the connecting rod 8 is fixedly connected with a transmission wheel 9, the transmission wheel 9 is frictionally matched with the cam 7, the output shaft of the first motor 6 drives the transmission wheel 9 to rotate synchronously through the transmission of the cam 7, and the transmission ratio between the cam 7 and the transmission wheel 9 is changed by adjusting the position of the first motor 6, a trigger mechanism for changing the position of the first motor 6 is provided on the upper side of the mounting plate 1, and a transport mechanism for conveying the lead frame is provided on the upper side of the mounting plate 1.

[0024] like Figure 1-Figure 3As shown, the trigger mechanism includes a second motor 10, the second motor 10 is electrically connected to the control terminal, the second motor 10 is fixedly connected to the front side of the mounting plate 1, the front side of the mounting plate 1 is rotatably connected to a transmission rod 11, the transmission rod 11 and the output shaft of the first motor 6 are driven by a spur gear set, the output shaft of the first motor 6 drives the transmission rod 11 to rotate synchronously through the transmission of the spur gear set, the transmission rod 11 is threadedly connected to a gland 12, the gland 12 is slidably connected to the mounting plate 1, the transmission rod 11 drives the gland 12 to move synchronously through the transmission of the thread during the rotation process, the rear side of the mounting plate 1 is fixedly connected to a liquid storage ring 13, the liquid storage ring 13 stores hydraulic oil, and the liquid storage ring 13 slides inside A moving ring 14 fixedly connected to the pressure cover 12 is connected. When the pressure cover 12 moves downward, it drives the moving ring 14 to move downward synchronously, thereby squeezing out the hydraulic oil in the liquid storage ring 13. A hydraulic telescopic rod 15 is fixedly connected to the fixed column 3 on the rear side. The telescopic end of the hydraulic telescopic rod 15 is fixedly connected to the first motor 6. The telescopic end of the hydraulic telescopic rod 15 is used to drive the first motor 6 and other parts connected thereto to move synchronously. The hydraulic telescopic rod 15 is located below the first motor 6. The liquid storage ring 13 is fixedly connected and communicated with a connecting pipe fixedly connected and communicated with the hydraulic telescopic rod 15. The hydraulic oil squeezed out of the liquid storage ring 13 flows to the fixed part of the hydraulic telescopic rod 15 through the transmission of the connecting pipe.

[0025] like Figure 1 and Figure 4-Figure 6As shown, the transport mechanism includes an electric telescopic frame 20, which is electrically connected to the control terminal. The electric telescopic frame 20 is an existing device, and its moving process is no longer described in detail. The electric telescopic frame 20 is installed on the upper side of the mounting plate 1, and a moving plate 21 is installed on the upper side of the electric telescopic frame 20. The electric telescopic frame 20 is used to drive the moving plate 21 to move up and down. A third motor 22 electrically connected to the control terminal is fixedly connected to the upper side of the right part of the moving plate 21, and a first moving block 23 and a second moving block 24 are slidably connected to the upper side of the moving plate 21. Two first elastic members 241 symmetrically distributed front and back are fixedly connected between the first moving block 23 and the second moving block 24. The first elastic member 241 is a tension spring. The upper side of the moving plate 21 is rotatably connected with a threaded rod 242. The threaded rod 242 is fixedly connected to the output shaft of the third motor 22. The output shaft of the third motor 22 drives the threaded rod 242 to rotate synchronously. The threaded rod 242 passes through the second moving block 24, and the threaded rod 242 is threadedly matched with the first moving block 23. During the rotation process, the threaded rod 242 drives the first moving block 23 synchronously through the transmission of the thread. The first moving block 23 moves step by step, and then the second moving block 24 is driven to move synchronously by the transmission of the two first elastic members 241. The upper side of the first moving block 23 and the upper side of the second moving block 24 are both provided with a fixed plate 25, wherein the first moving block 23 is fixedly connected to the adjacent fixed plate 25, and the first moving block 23 and the second moving block 24 respectively drive the adjacent fixed plates 25 to move synchronously during the movement process, and the upper side of the fixed plate 25 is fixedly connected to two positioning rods 26 symmetrically distributed front and back through a connecting member, and the two positioning rods on the same fixed plate 25 are fixedly connected to the upper side of the fixed plate 25. The rod 26 is arranged as a group, and the positioning rod 26 slides with the adjacent positioning holes on the left side of the adjacent lead frame. The distance between the two groups of positioning rods 26 is the same as the distance between two non-adjacent positioning holes on the same side of the two adjacent lead frames. The two positioning rods 26 in the same group cooperate with each other to jointly drive the lead frame to move to the left. The cutting table 2 is provided with two front and rear sliding grooves, and the positioning rod 26 slides in the adjacent sliding grooves on the cutting table 2. A support component is provided on the fixing plate 25, and the support component is used to fix the lead frame and the adjacent positioning rods 26.

[0026] like Figure 6-Figure 8As shown, the support assembly includes a double-axis motor 30 electrically connected to the control terminal, the double-axis motor 30 is fixedly connected to the upper side of the adjacent fixing plate 25, the positioning rod 26 is provided with a through hole, and a connecting sleeve 31 is rotatably connected in the through hole of the positioning rod 26. The connecting sleeve 31 and the adjacent output shafts on the adjacent double-axis motor 30 are driven by a bevel gear set. The two output shafts of the double-axis motor 30 respectively drive the adjacent connecting sleeves 31 to rotate through the transmission of the adjacent bevel gear sets. The connecting sleeve 31 is threadedly connected to a moving rod 32. The moving rod 32 is threadedly connected to the moving rod 32. A conical block 33 is fixedly connected to the upper end of the rod 32, and a group of support blocks 34 are slidably connected to the upper side of the positioning rod 26. Each group of support blocks 34 is set to four evenly distributed in the circumferential direction. The support blocks 34 are slidably connected to the adjacent conical blocks 33. The positioning rod 26 cooperates with the adjacent group of support blocks 34 to limit the adjacent conical blocks 33. At the same time, the conical blocks 33 limit the adjacent moving rods 32, so that the moving rods 32 cannot rotate with the adjacent connecting sleeves 31. When the connecting sleeves 31 rotate, the connecting sleeves 31 The transmission of the thread drives the adjacent moving rods 32 and other parts connected thereto to move synchronously (up and down), and the support block 34 is squeezed and matched with the adjacent conical block 33. The moving rod 32 drives the adjacent conical block 33 to move synchronously during the movement, and spreads out an adjacent group of support blocks 34, so that the distance between the opposite sides of an adjacent group of support blocks 34 gradually increases. The thread on the connecting sleeve 31 is an internal thread, and the diameter of the through hole of the positioning rod 26 is larger than the major diameter of the threaded portion on the moving rod 32, so as to avoid the diameter of the through hole of the positioning rod 26 affecting the normal movement of the moving rod 32, and the height of the connecting sleeve 31, the height of the thread on the positioning rod 26 and the height of the conical block 33 are all equal. When the moving rod 32 moves to the extreme position, the adjacent connecting sleeve 31 and the adjacent conical block 33 move synchronously to the extreme position, and when the conical block 33 moves downward to the extreme position, the distance between the adjacent group of support blocks 34 is the maximum distance, and a limiting component is provided on one side of the moving plate 21, and the limiting component is used to fix the second moving block 24.

[0027] like Figure 5 , Figure 6 and Fig. 9As shown, the limiting component includes a connecting shell 40, which is fixedly connected to the front side of the moving plate 21 through a connecting piece, and the interior of the connecting shell 40 is slidably connected to a limiting block 41, and an inclined surface is provided on the left side of the limiting block 41. The limiting block 41 is squeezed and matched with the first moving block 23. In the initial position, the limiting block 41 is already located inside the connecting shell 40, and a second elastic member 42 is fixedly connected between the limiting block 41 and the connecting shell 40. The second elastic member 42 is a spring, and in the initial position, the second elastic member 42 is in a compressed state. When the first moving block 23 moves to the left to a position where it loses contact with the limiting block 41, the second elastic member 42 drives the limiting block 41 to move backward, and a limiting groove that cooperates with the limiting block 41 is provided on the front side of the second moving block 24, and a limiting groove that cooperates with the limiting block 41 is provided on the left side of the second moving block 24. The limit block 41 squeezes the inclined surface, and the second moving block 24 squeezes the right side surface of the limit block 41 during the process of moving to the left, so that the limit block 41 moves into the connecting shell 40. The left side of the limiting groove of the second moving block 24 is provided with an inclined surface that is squeezed and matched with the limit block 41. The inclined surface on the limit block 41 and the inclined surface on the second moving block 24 are symmetrically distributed. The inclined surface in the limiting groove of the second moving block 24 has the same inclination direction as the inclined surface on the limit block 41. During the process of the second moving block 24 moving to the left, the inclined surface in the limiting groove of the second moving block 24 squeezes the inclined surface on the limit block 41. The limit block 41 is used to lock the second moving block 24. When the second moving block 24 moves to the left to the position where its limiting groove cooperates with the limit block 41, the second moving block 24 cannot continue to move to the left.

[0028] In the present invention, the lead frames on the winding roll 4 are, from left to right, the first lead frame, the second lead frame, and so on to the Nth lead frame; when using the present device to cut the lead frame, the staff moves the pre-treated winding roll 4 to the right side of the cutting table 2 with the help of existing transportation tools, passes one end of the lead frame on the winding roll 4 around the guide shaft 402 and the guide device on the mounting plate 1, and moves the two left positioning holes on the first lead frame to positions perpendicular to the adjacent positioning rods 26 on the right side, and then the control terminal starts the electric telescopic frame 20, and the electric telescopic frame 20 drives the moving plate 21 to move upward, and the moving plate 21 drives the four positioning rods 26 to move upward synchronously through the transmission of other parts connected thereto.

[0029] Until the moving plate 21 moves upward to the limit position, the control terminal shuts down the electric telescopic frame 20. At this time, the two positioning rods 26 on the right are respectively located in the adjacent positioning holes on the left side of the first lead frame. Then the control terminal starts the double-axis motor 30 on the right. The output shaft of the double-axis motor 30 drives the two adjacent connecting sleeves 31 to rotate synchronously through the transmission of the bevel gear set. The connecting sleeve 31 drives the adjacent moving rods 32 to move downward through the transmission of the internal thread. The moving rod 32 drives the adjacent conical block 33 to move downward. The conical block 33 squeezes an adjacent group of support blocks 34 during the downward movement, so that the group of support blocks 34 are respectively separated from each other along the positioning rods 26, until the outer side walls of the group of support blocks 34 are in contact with the inner walls of the adjacent positioning holes on the left side of the first lead frame. Then the control terminal shuts down the double-axis motor 30 on the right, fixes the two groups of support blocks 34 on the right at this position, and the two groups of support blocks 34 on the right cooperate with each other to position the left side of the first lead frame, so that the first lead frame moves along the cutting table 2 during the subsequent movement, thereby avoiding the first lead frame from being skewed during the movement.

[0030] When the above-mentioned control terminal shuts down the right-side dual-axis motor 30, the control terminal synchronously starts the third motor 22, and the output shaft of the third motor 22 drives the first movable block 23 to move synchronously to the left through the transmission of the threaded rod 242, and the first movable block 23 drives the second movable block 24 to move synchronously to the left through the transmission of the two first elastic members 241, and the second movable block 24 drives the adjacent fixed plate 25 to move synchronously to the left, and the fixed plate 25 pulls the first lead frame to the left through the transmission of the two adjacent positioning rods 26, and stretches a part of the lead frame on the winding roll 4 to supplement the cut lead frame.

[0031] In the process of the first moving block 23 driving the second moving block 24 to move leftward, when the first moving block 23 moves leftward to a position where it loses contact with the limit block 41, the limit block 41 moves backward under the action of the second elastic member 42 until the second elastic member 42 is relaxed to the limit length, and the limit block 41 stops moving, and when the inclined surface on the left side of the second moving block 24 contacts the limit block 41, the inclined surface on the left side of the second moving block 24 squeezes the limit block 41 during the movement, so that the limit block 41 moves into the connecting shell 40, and the second elastic member 42 is compressed and accumulates force, until the second moving block 24 moves leftward to a position where its upper limit groove contacts the limit block 41, the limit block 41 moves backward again under the action of the second elastic member 42, and the limit block 41 limits the second moving block 24, so that the second moving block 24 cannot continue to move leftward with the first moving block 23, and at this time, the connection between the first lead frame and the second lead frame is located above the groove of the cutting table 2.

[0032] When the second moving block 24 stops moving to the left, the first moving block 23 continues to move to the left to stretch the two first elastic members 241 to accumulate force until the first elastic members 241 are stretched to the limit state, and the first moving block 23 moves to the left to the limit position, and then the control terminal turns off the third motor 22, and starts the second motor 10 at the same time. The output shaft of the second motor 10 drives the transmission rod 11 to rotate synchronously through the transmission of the spur gear group, and the transmission rod 11 drives the pressure cover 12 to move downward through the transmission of the thread, until the pressure cover 12 moves downward to its lower side and contacts the upper side of the first lead frame. The control terminal turns off the second motor 10, and the pressure cover 12 and the cutting table 2 cooperate with each other to clamp the first lead frame, and at the same time flatten the first lead frame to ensure the flatness of the lead frame after cutting.

[0033] During the downward movement of the above-mentioned pressure cover 12, the pressure cover 12 drives the moving ring 14 to move downward synchronously, and the moving ring 14 squeezes out the hydraulic oil in the liquid storage ring 13, and then the hydraulic oil squeezed out in the moving ring 14 flows into the hydraulic telescopic rod 15 through the adjacent connecting pipe, so that the telescopic end of the hydraulic telescopic rod 15 drives the first motor 6 to move upward along the adjacent fixed column 3, and the first motor 6 drives the cam 7 to move upward synchronously to change the contact position of the cam 7 and the transmission wheel 9, thereby changing the transmission ratio between the cam 7 and the transmission wheel 9, and thereby changing the rotation speed of the connecting rod 8. After the above-mentioned control terminal shuts down the second motor 10, the first motor 6 no longer moves upward, so that the downward moving speed of the cutting knife 5 can be adjusted with the thickness of the lead frame to reduce the wear of the cutting knife 5 during the cutting process and extend the service life of the cutting knife 5.

[0034] When the above-mentioned control terminal shuts down the second motor 10, the control terminal starts the dual-axis motor 30 on the right side in reverse, and the output shaft of the dual-axis motor 30 on the right side drives the two adjacent groups of support blocks 34 to reset to the initial position, thereby making the two groups of support blocks 34 on the right side lose contact with the positioning holes on the left side of the first lead frame, and after the two groups of support blocks 34 on the right side are reset to the initial position, the control terminal shuts down the dual-axis motor 30 on the right side.

[0035] When the above-mentioned control terminal shuts down the double-axis motor 30 on the right side, the control terminal reversely starts the electric telescopic frame 20, and the electric telescopic frame 20 drives the moving plate 21 and other parts connected thereto to reset downward. Until the moving plate 21 is reset to the initial position, the control terminal shuts down the electric telescopic frame 20, and at the same time, the control terminal reversely starts the third motor 22, and the output shaft of the third motor 22 drives the first moving block 23 to reset to the right through the transmission of the threaded rod 242. In the process of the first moving block 23 moving to the right, the tension on the two first elastic members 241 is gradually reduced, so that the two first elastic members 241 are gradually reset to the initial state. When the two first elastic members 241 are reset to the initial state, the first moving block 23 drives the second moving block 24 to move to the right synchronously through the transmission of the two first elastic members 241. At the same time, in the process of the second moving block 24 moving to the right, the inclined surface on the left side of the limiting groove of the second moving block 24 squeezes the inclined surface on the left side of the limiting block 41, so that the limiting block 41 moves into the connecting shell 40, and the second elastic member 42 is compressed and stored.

[0036] Until the limit block 41 loses contact with the second moving block 24, the limit block 41 moves backward again under the action of the second elastic member 42, until the first moving block 23 moves to the right to a position where its right side contacts the inclined surface of the left side of the limit block 41, the first moving block 23 moves to the right to squeeze the limit block 41, so that the limit block 41 moves into the connecting shell 40 again, until the first moving block 23 and the second moving block 24 are both reset to their initial positions, the control terminal shuts down the third motor 22, at which time the first moving block 23 contacts the limit block 41 and maintains the limit block 41 in this position (that is, the limit block 41 is located in the connecting shell 40), and at this time the two positioning holes on the left side of the first lead frame are respectively located above the adjacent positioning rods 26 on the left side.

[0037] After the control terminal shuts down the third motor 22, the control terminal starts the first motor 6. The output shaft of the first motor 6 drives the connecting rod 8 to rotate synchronously through the transmission of the cam 7 and the transmission wheel 9. The connecting rod 8 drives the cutting knife 5 to move downward through the transmission of the thread, and the cutting knife 5 cuts the connection between the first lead frame and the second lead frame to cut off the first lead frame.

[0038] After the first lead frame is cut, the control terminal starts the first motor 6 and the second motor 10 in reverse, and the first motor 6 resets the cutting knife 5 to the initial position, and the second motor 10 resets the pressure cover 12 to the initial position, and then the control terminal shuts down the first motor 6 and the second motor 10, and then the control terminal starts the electric telescopic frame 20 again, and the electric telescopic frame 20 drives the moving plate 21 and other parts connected thereto to move upward synchronously again, until the electric telescopic frame 20 moves upward to the limit position, and the two positioning rods 26 on the left are respectively located in the adjacent positioning holes on the left side of the first lead frame, and the two positioning rods 26 on the right are respectively located on the left side of the second lead frame The control terminal then starts the third motor 22 again, and the second moving block 24 moves the connection between the second lead frame and the third lead frame to the cutting position, and the first moving block 23 moves the cut first lead frame to the left side of the cutting table 2 (the specific process will not be described in detail, refer to the above, where the movement process of the left dual-axis motor 30 is the same as the movement process of the right dual-axis motor 30), and then the conveying device transports the cut lead frame to the next processing position, and cuts the remaining lead frames in turn according to the above operations, and the staff regularly inspects the device to ensure that the device can be used normally.

[0039] In the process of synchronously transporting the lead frame by the second moving block 24 and the first moving block 23, the positioning accuracy of the lead frame by the device is increased by supporting and positioning the first lead frame by the two groups of support blocks 34 on the left side and supporting and positioning the second lead frame by the two groups of support blocks 34 on the right side. At the same time, the two adjacent lead frames always maintain the same distance during the movement, avoiding collision between the cut lead frame and the uncut lead frame, which is beneficial to ensure the uniform cutting size of the product, ensure the stability of product quality, and reduce the cutting scrap rate of the product.

[0040] In this embodiment, the two connection posts 401 are respectively fixedly connected to the adjacent connection blocks. In Embodiment 2, the two connection posts 401 are respectively slidably connected to the adjacent connection blocks.

[0041] Example 2: Considering the current lead frame slitting device, when the lead frame on the wound roll is transported to the cutting position, there is a rigid connection between the conveying device and the lead frame. When the force required to stretch the lead frame is large, the rigid connection between the conveying device and the lead frame can easily cause the conveying device to stretch the lead frame, causing the lead frame to be stretched and deformed.

[0042] On the basis of Example 1, Figure 5 , Fig.10 and Fig.11As shown, it also includes an adjusting mechanism, which is used to change the position of the guide shaft 402. The adjusting mechanism is arranged on the upper side of the second movable block 24. The adjusting mechanism includes a liquid storage shell 50. The interior of the liquid storage shell 50 is filled with hydraulic oil. The liquid storage shell 50 is fixedly connected to the right side of the upper part of the second movable block 24. The second movable block 24 is slidably connected to the adjacent fixed plate 25. An extrusion block 51 is slidably connected in the liquid storage shell 50. The extrusion block 51 is fixedly connected to the adjacent fixed plate 25. The fixed plate 25 drives the extrusion block 51 to move synchronously, and the extrusion block 51 squeezes out the hydraulic oil in the liquid storage shell 50. A third elastic member 52 symmetrically distributed front and back is fixedly connected between the second movable block 24 and the adjacent fixed plate 25. The third elastic member 52 is a spring. The third elastic member 52 is used to maintain the initial position of the adjacent fixed plate 25 and drive the fixed plate 25 to reset to the initial position after movement. A liquid storage pipe 53 is inlaid on the right side of the upper part of the mounting plate 1. The liquid storage pipe 53 and the liquid storage The shells 50 are connected by a connecting pipe, and the connecting pipe transports the hydraulic oil squeezed out of the liquid storage shell 50 to the liquid storage pipe 53. The inside of the liquid storage pipe 53 is slidably connected with a push plate 54, and the position where the connecting pipe is connected to the liquid storage pipe 53 is located on the upper side of the push plate 54, so that the push plate 54 is squeezed by the hydraulic oil and moves downward. A fixing rod 55 is fixed to the upper side of the push plate 54, and the fixing rod 55 is fixed to the connecting block on the front connecting column 401. During the downward movement of the push plate 54, the guide shaft 402 is driven by the transmission of the fixing rod 55 to move downward synchronously, thereby releasing the buffer part reserved between the guide device and the winding roll 4 on the cutting table 2 of the lead frame. The two connecting columns 401 are respectively slidably connected to the adjacent connecting blocks for guiding the guide shaft 402. After the lead frame on the winding roll 4 bypasses the guide device and the guide shaft 402, the guide device and the guide shaft 402 cooperate with each other to reserve a buffer part for the lead frame on the winding roll 4.

[0043] In the process of pulling out the lead frame on the winding roll 4 by the two positioning rods 26 on the right side, the two positioning rods 26 on the right side squeeze the adjacent positioning holes on the adjacent lead frames respectively, and at the same time, the two positioning holes on the left side of the lead frame also exert a reverse force on the two positioning rods 26, so that the two positioning rods 26 are forced to drive the adjacent fixed plates 25 to move rightward relative to the second moving block 24, and the two third elastic members 52 are compressed and stored by the right fixed plate 25 during the movement, and at the same time, the right fixed plate 25 drives the extrusion block 51 to move rightward synchronously during the movement, and the hydraulic oil stored in the liquid storage shell 50 is squeezed out by the extrusion block 51.

[0044] After the extrusion block 51 squeezes out the hydraulic oil stored in the liquid storage shell 50, the hydraulic oil squeezed out of the liquid storage shell 50 is transported to the liquid storage tube 53 through the transmission of the adjacent connecting pipe, so that the push plate 54 moves downward due to the extrusion force, and the push plate 54 drives the fixing rod 55 to move downward, and the fixing rod 55 drives the guide shaft 402 to move downward synchronously along the two connecting columns 401, so that the height of the guide shaft 402 is reduced, and the buffer part reserved between the guide device of the lead frame on the cutting table 2 and the winding roll 4 is released, so that the two positioning rods 26 on the right side can normally drive the adjacent lead frame to move to the left, avoiding the two positioning rods 26 respectively squeezing the adjacent positioning holes on the adjacent lead frames, causing the two positioning holes on the left side of the adjacent lead frames to be deformed, resulting in damage to the quality of the lead frame.

[0045] Until the second moving block 24 and the first moving block 23 both move to the left to the extreme position, the control terminal turns off the third motor 22 and fixes the second moving block 24 and the first moving block 23 at this position. When the above-mentioned control terminal turns off the third motor 22, the two positioning rods 26 on the right side slowly return to the left under the joint action of the two third elastic members 52, and drive the fixing rod 55 and the guide shaft 402 to slowly return upward, slowly pulling out the remaining lead frame on the winding roll 4, reserving the buffer part, and also moving the connection between the left uncut lead frame and the adjacent lead frame to the cutting position.

[0046] After the two third elastic members 52 are reset to their initial positions, the control terminal starts the second motor 10 according to the above operation, and the second motor 10 drives the pressure cover 12 to move downward, and the pressure cover 12 squeezes and fixes the lead frame to be cut. Then, the control terminal resets the two positioning rods 26 on the right and other parts connected thereto to their initial positions according to the above operation, and completes the cutting of the remaining lead frames according to the above operation.

[0047] Embodiment 3: Based on embodiment 2, Figure 1-Figure 11 As shown, a lead frame cutting method and a lead frame cutting device based on the above technical solution include the following steps: S1: Move the pre-treated winding roll 4 to the right side of the cutting table 2, pass one end of the lead frame on the winding roll 4 around the guide shaft 402 and the guide device on the mounting plate 1, and move the two leftmost positioning holes of the lead frame to above the left adjacent positioning rod 26; S2: The control terminal starts the electric telescopic frame 20, and the electric telescopic frame 20 drives the two right positioning rods 26 to move upward synchronously through the transmission of other parts connected thereto, until the two right positioning rods 26 extend into adjacent positioning holes on adjacent lead frames, and the electric telescopic frame 20 is shut down; S3: When the electric telescopic frame 20 moves upward to the limit position, the control terminal starts the double-axis motor 30 on the right side, and the double-axis motor 30 drives the two adjacent groups of support blocks 34 to open, and the two groups of support blocks 34 fix the adjacent lead frames, and the double-axis motor 30 on the right side is turned off; S4: After the adjacent lead frames are fixed, the control terminal starts the third motor 22, and the third motor 22 drives the adjacent fixing plate 25 to move synchronously through the threaded rod 242, the first moving block 23, the two first elastic members 241, and the second moving block 24. The fixing plate 25 moves the adjacent lead frame to the cutting position through the transmission of the two adjacent positioning rods 26, and then the third motor 22 is turned off; S5: After the lead frame is moved to the cutting position, the control terminal starts the second motor 10, and the output shaft of the second motor 10 drives the pressure cover 12 to move downward through the transmission of the spur gear set and the transmission rod 11, and the pressure cover 12 and the cutting table 2 cooperate with each other to clamp and flatten the adjacent lead frames, and then the second motor 10 is turned off; S6: After the lead frame is fixed, the control terminal starts the right-side dual-axis motor 30 and the electric telescopic frame 20 in reverse order, so that the two sets of support blocks 34 and the movable plate 21 and other parts connected thereto are reset to the initial position, and then the right-side dual-axis motor 30 and the electric telescopic frame 20 are shut down in turn; S7: After the moving plate 21 is reset to the initial position, the control terminal starts the first motor 6, and the output shaft of the first motor 6 drives the cutting knife 5 to move downward through the cam 7, the transmission wheel 9 and the connecting rod 8, and the cutting knife 5 cuts the connection between two adjacent lead frames to cut off the lead frame; S8: After the lead frame is cut, the control terminal starts the first motor 6 and the second motor 10 in reverse order, and resets the cutting knife 5 and the pressure cover 12 to the initial position in order. Then the control terminal starts the electric telescopic frame 20 again, and repeats the above steps to transport the cut lead frame to the next operation process. At the same time, the next lead frame to be cut is transported to the cutting position, and the cutting knife 5 cuts the remaining lead frame.

[0048] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A lead frame slitting device, comprising a mounting plate (1), a cutting table (2) being fixedly connected to the upper side of the mounting plate (1), symmetrically distributed fixing columns (3) being fixedly connected to the upper side of the mounting plate (1), the symmetrically distributed fixing columns (3) being located on both sides of the cutting table (2), a winding roll (4) being provided on one side of the mounting plate (1), a lead frame roll being wound on the winding roll (4), the lead frames on the winding roll (4) being provided with rectangular array positioning holes, the mounting plate (1) being close to the winding roll One side of (4) is fixedly connected with symmetrically distributed connecting columns (401), the symmetrically distributed connecting columns (401) are all provided with connecting blocks, the symmetrically distributed connecting columns (401) are rotatably connected with guide shafts (402) through adjacent connecting blocks, the lead frame bypasses the guide shafts (402), the upper side of the mounting plate (1) is provided with a guiding device, the symmetrically distributed fixing columns (3) are slidably connected with a cutting knife (5), the cutting table (2) is provided with a groove matched with the cutting knife (5), and is characterized in that: The invention also comprises a first motor (6), wherein the first motor (6) is slidably connected to one of the fixed columns (3), the output shaft of the first motor (6) is fixedly connected to a cam (7), the fixed column (3) is rotatably connected to a connecting rod (8), the connecting rod (8) is threadedly engaged with the cutting knife (5), the end of the connecting rod (8) away from the cutting knife (5) is fixedly connected to a transmission wheel (9), the transmission wheel (9) is frictionally engaged with the cam (7), a trigger mechanism for changing the position of the first motor (6) is arranged on the upper side of the mounting plate (1), and a transport mechanism for transporting a lead frame is arranged on the upper side of the mounting plate (1).

2. A lead frame cutting device according to claim 1, characterized in that: The trigger mechanism comprises a second motor (10), the second motor (10) being fixedly connected to a side of the mounting plate (1) away from the first motor (6), a transmission rod (11) being rotatably connected to a side of the mounting plate (1) close to the second motor (10), the transmission rod (11) and the output shaft of the first motor (6) being transmitted via a gear set, the transmission rod (11) being threadedly connected to a gland (12), the gland (12) being slidably connected to the mounting plate (1), a liquid storage ring (13) being fixedly connected to a side of the mounting plate (1) close to the first motor (6), a moving ring (14) being slidably connected to the gland (12), the fixed column (3) being slidably connected to the first motor (6) being fixedly connected to a hydraulic telescopic rod (15), the telescopic end of the hydraulic telescopic rod (15) being fixedly connected to the first motor (6), the liquid storage ring (13) being fixedly connected to and communicated with a connecting pipe which is fixedly connected to and communicated with the hydraulic telescopic rod (15).

3. The lead frame cutting device according to claim 2, characterized in that: The transport mechanism comprises an electric telescopic frame (20), the electric telescopic frame (20) being mounted on the upper side of the mounting plate (1), a moving plate (21) being mounted on the upper side of the electric telescopic frame (20), a third motor (22) being fixedly connected to one side of the moving plate (21), a first moving block (23) and a second moving block (24) being slidably connected to the upper side of the moving plate (21), a first elastic member (241) being fixedly connected between the first moving block (23) and the second moving block (24), a threaded rod (242) being rotatably connected to the upper side of the moving plate (21), the threaded rod (242) being fixedly connected to the output shaft of the third motor (22), and the threaded rod (242) passing through the second moving block (24). , and the threaded rod (242) is threadedly matched with the first moving block (23), and the upper side of the first moving block (23) and the upper side of the second moving block (24) are both provided with a fixing plate (25), wherein the first moving block (23) is fixedly connected to the adjacent fixing plate (25), and the upper side of the fixing plate (25) is fixedly connected with symmetrically distributed positioning rods (26) through a connecting piece, and the positioning rods (26) are slidably matched with the positioning holes of the lead frame, and the cutting table (2) is provided with symmetrically distributed sliding grooves, and the positioning rods (26) slide in adjacent sliding grooves on the cutting table (2), and a support component is provided on the fixing plate (25), and the support component is used to fix the lead frame and the adjacent positioning rods (26).

4. The lead frame cutting device according to claim 3, characterized in that: The distance between the positioning rods (26) on the same side of the two fixing plates (25) is the same as the distance between non-adjacent positioning holes on the same side of adjacent lead frames.

5. The lead frame cutting device according to claim 4, characterized in that: The support assembly comprises a dual-axis motor (30), the dual-axis motor (30) being fixedly connected to a side of the adjacent fixed plate (25) away from the movable plate (21), the positioning rod (26) being provided with a through hole, a connecting sleeve (31) being rotatably connected in the through hole of the positioning rod (26), the connecting sleeve (31) and an adjacent output shaft on the adjacent dual-axis motor (30) being transmitted via a gear set, the connecting sleeve (31) being threadedly connected to a movable rod (32), the movable rod (32) being remote from the fixed plate (25), the connecting sleeve (31) being threadedly connected to the movable plate (21), the connecting sleeve (31) being remote from the fixed plate (25), the connecting sleeve (31) being connected to the movable plate (21), the connecting sleeve (31) being connected to the movable plate (32) and the movable plate (32) being remote from the fixed plate (25 ... A conical block (33) is fixedly connected to one end away from the adjacent fixed plate (25); a side of the positioning rod (26) away from the adjacent fixed plate (25) is slidably connected to a support block (34) evenly distributed in the circumferential direction; the support block (34) is slidably connected to the adjacent conical block (33), and the support block (34) is pressed and fitted with the adjacent conical block (33); a limiting component is provided on one side of the movable plate (21), and the limiting component is used to fix the second movable block (24).

6. The lead frame cutting device according to claim 5, characterized in that: The thread on the connecting sleeve (31) is an internal thread, the diameter of the through hole of the positioning rod (26) is larger than the major diameter of the threaded portion on the moving rod (32), and the height of the connecting sleeve (31), the height of the thread on the positioning rod (26), and the height of the tapered block (33) are all equal.

7. The lead frame cutting device according to claim 6, characterized in that: The limiting component comprises a connecting shell (40), the connecting shell (40) being fixedly connected to one side of the movable plate (21) through a connecting piece, the connecting shell (40) being internally slidably connected to a limiting block (41), a side of the limiting block (41) away from the winding roll (4) being provided with an inclined surface, the limiting block (41) being pressed and matched with the first movable block (23), a second elastic member (42) being fixedly connected between the limiting block (41) and the connecting shell (40), a limiting groove being limited and matched with the limiting block (41) being provided on a side of the second movable block (24) close to the connecting shell (40), and an inclined surface being pressed and matched with the limiting block (41) being provided on a side of the second movable block (24) close to the connecting shell (40) and a side of the inclined groove on the connecting shell (40) close to the first movable block (23).

8. The lead frame cutting device according to claim 7, characterized in that: The upper inclined surface of the limit block (41) and the upper inclined surface of the second movable block (24) are symmetrically distributed, and the inclined surface in the limit groove of the second movable block (24) has the same inclination direction as the upper inclined surface of the limit block (41).

9. The lead frame cutting device according to claim 8, characterized in that: The second movable block (24) further comprises an adjusting mechanism, the adjusting mechanism being used to change the position of the guide shaft (402), the adjusting mechanism being arranged on the upper side of the second movable block (24), the adjusting mechanism comprising a liquid storage shell (50), the liquid storage shell (50) being fixedly connected to a side of the second movable block (24) away from the movable plate (21), the second movable block (24) being slidably connected to the adjacent fixed plate (25), an extrusion block (51) being slidably connected inside the liquid storage shell (50), the extrusion block (51) being slidably connected to the adjacent The fixing plate (25) is fixedly connected, a third elastic member (52) is fixedly connected between the second movable block (24) and the adjacent fixing plate (25), a liquid storage tube (53) is embedded on one side of the mounting plate (1), a push plate (54) is slidably connected inside the liquid storage tube (53), a fixing rod (55) is fixedly connected to the upper side of the push plate (54), the fixing rod (55) is fixedly connected to an adjacent connecting block on one of the connecting columns (401), and the symmetrically distributed connecting columns (401) are respectively slidably connected to adjacent connecting blocks.

10. A lead frame cutting method, based on the lead frame cutting device according to claim 9, characterized in that: The following steps are involved: S1: moving the pre-treated winding roll (4) to the right side of the cutting table (2), passing one end of the lead frame on the winding roll (4) around the guide shaft (402) and the guide device on the mounting plate (1), and moving the two leftmost positioning holes of the lead frame to above the adjacent positioning rod (26) on the left side; S2: The control terminal starts the electric telescopic frame (20), and the electric telescopic frame (20) drives the two right positioning rods (26) to move upward synchronously through the transmission of other parts connected thereto, until the two right positioning rods (26) extend into adjacent positioning holes on adjacent lead frames, and the electric telescopic frame (20) is shut down; S3: When the electric telescopic frame (20) moves upward to the limit position, the control terminal starts the double-axis motor (30) on the right side, and the double-axis motor (30) drives the two adjacent groups of support blocks (34) to open, and the two groups of support blocks (34) fix the adjacent lead frames, and the double-axis motor (30) on the right side is turned off; S4: After the adjacent lead frames are fixed, the control terminal starts the third motor (22), and the third motor (22) drives the adjacent fixed plates (25) to move synchronously through the threaded rod (242), the first moving block (23), the two first elastic members (241), and the second moving block (24). The fixed plates (25) move the adjacent lead frames to the cutting position through the transmission of the two adjacent positioning rods (26), and then the third motor (22) is turned off; S5: After the lead frame is moved to the cutting position, the control terminal starts the second motor (10), and the output shaft of the second motor (10) drives the pressure cover (12) to move downward through the transmission of the spur gear set and the transmission rod (11), and the pressure cover (12) and the cutting table (2) cooperate with each other to clamp and flatten the adjacent lead frames, and then the second motor (10) is turned off; S6: After the lead frame is fixed, the control terminal starts the right-side dual-axis motor (30) and the electric telescopic frame (20) in reverse order, so that the two sets of support blocks (34) and the movable plate (21) and other parts connected thereto are reset to their initial positions, and then the right-side dual-axis motor (30) and the electric telescopic frame (20) are shut down in turn; S7: After the movable plate (21) is reset to the initial position, the control terminal starts the first motor (6), and the output shaft of the first motor (6) drives the cutting knife (5) to move downward through the cam (7), the transmission wheel (9) and the connecting rod (8), and the cutting knife (5) cuts the connection between two adjacent lead frames, thereby cutting off the lead frame; S8: After the lead frame is cut, the control terminal starts the first motor (6) and the second motor (10) in reverse order, and resets the cutting knife (5) and the pressure cover (12) to their initial positions in order. The control terminal then starts the electric telescopic frame (20) again, and repeats the above steps to transport the cut lead frame to the next operation process, and at the same time transports the next lead frame to be cut to the cutting position, and the cutting knife (5) cuts the remaining lead frame.

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