Lead frame stamping and cutting composite die and waste chip collecting equipment

Abstract

The invention discloses a lead frame stamping and cutting composite die and waste chip collecting equipment, and belongs to the technical field of stamping devices. Comprising a lower die base device, an upper die stamping and cutting composite device, double guide columns, a pressure transition plate and corner locking openings for three-stage rigid guiding, transverse deviation, material retraction and vibration at the cutting moment are reduced to the limit, + / -0.02 mm zero-clearance positioning is achieved, the section perpendicularity is smaller than 0.5 degree, the burr height is reduced by 50%, and a lead frame is formed at a time and does not need to be leveled; a film pressure matrix, a 200fps visual optical fiber and a capacitance scrap position sensor are used for monitoring the cutting edge, the material thickness and the scrap state on line, a 3ms health score is calculated on the edge, and a three-level plan of deceleration-shutdown-tool changing is automatically triggered when the score is smaller than 85; cloud digital twinning real-time mapping abrasion is achieved, the tool changing period is prolonged by 30%, and the spare part inventory is reduced by 35%.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment technology, and in particular to a composite die for stamping and cutting lead frame and a waste collection device. Background Technology

[0002] As the "skeleton" of semiconductor packaging, the lead frame requires a burr-free, warp-free, and precisely positioned cross-section after punching. Traditional molds use a single guide post and an integral blanking structure, which lacks sufficient guiding rigidity. Lateral displacement easily occurs at the moment of cutting, leading to lead wire misalignment and large cross-sectional collapse angles. Subsequent leveling and deburring are required, increasing processes and costs. Mold wear lacks online monitoring, and on-site judgment of cutting edge life relies on experience, often resulting in continued punching after chipping, causing mold collisions and shutdowns. Copper shavings can easily bounce back into the mold, causing secondary cutting, damaging both the cutting edge and the lead frame. Accumulated shavings can also cause mold jamming, requiring frequent manual cleaning and affecting continuous production.

[0003] Existing molds lack integrated sensors, resulting in the absence of records for key parameters such as pressure, temperature, and wear, making it impossible to interface with the factory's MES (Manufacturing Execution System). When quality anomalies occur, manual mold disassembly and inspection are required, leading to time-consuming traceability and failing to meet the semiconductor packaging requirements for zero defects and single-piece traceability. To address this, a composite mold for lead frame stamping and cutting, along with a waste collection device, is proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a composite die for stamping and cutting lead frames and a waste collection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lead frame stamping and cutting composite mold and waste collection equipment, comprising a lower mold base device and an upper mold stamping and cutting composite device, wherein the upper mold stamping and cutting composite device is installed in the inner cavity of the lower mold base device, the lower mold base device includes a base and a lower mold positioning and material receiving device installed at the edge of the upper end face of the base, a column bracket is vertically installed at the other edge of the upper end face of the base, a transverse mounting sleeve is installed at the bottom center of the side end face of the column bracket, a top beam is installed at the top of the column bracket, and a stamping drive interface is installed on the front end face of the top beam.

[0006] Preferably, the lower mold positioning and material support device includes a material support base and a clamping platform installed on the upper surface of the material support base, with protrusions and recesses provided on both sides of the upper surface of the clamping platform.

[0007] The material support base directly bears the downward punching force of the replaceable cutting pressure knife, ensuring zero deflection of the entire lower die during the cutting process;

[0008] The flat upper surface of the clamping platform fits against the bottom of the replaceable cutting pressure knife to form upper and lower clamping surfaces, pressing the lead frame into a stationary state and preventing the strip from slipping or warping during punching.

[0009] The two recesses of the boss correspond one-to-one with the pre-formed protrusions on the lead frame, which not only allows the boss to sink completely without being damaged, but also provides four-point positioning in the horizontal direction, so that the positional error of each lead relative to the cutting edge is controlled within ±0.02mm, achieving zero-gap precision cutting, and no further leveling is required.

[0010] Preferably, the upper die stamping and cutting composite device includes a main slide block and an intermediate pad plate installed at the bottom of the main slide block. A central tie rod is inserted through the bottom of the intermediate pad plate. Two sets of side guide posts are vertically installed on both sides of the main slide block. The central tie rod and the side guide posts are inserted through the inner cavity of the double guide post sleeve.

[0011] After receiving power from the external punch press, the main slide distributes the linear reciprocating motion to the central tie rod and the side guide post in one go, ensuring that there is no lateral offset in the up and down stroke;

[0012] The central tie rod directly transfers the stroke of the main slider to the pressure transition plate. It passes through the inner cavity of the double guide column sleeve together with the side guide column to form a double guide column structure, which guides and resists the transverse shear force, so that the cutting edge is always perpendicular to the lead frame and reduces burrs.

[0013] Preferably, the upper die stamping and cutting composite device further includes a pressure transition plate installed at the bottom of the central tie rod and the side guide post, and a replaceable cutting pressure knife is installed at the bottom of the pressure transition plate;

[0014] The pressure transition plate converts the concentrated tensile force into surface pressure and applies it evenly to the replaceable cutting pressure knife, avoiding local overload and chipping of the cutting edge;

[0015] The lower surface of the replaceable cutting and pressing blade is attached to the upper surface of the lower die positioning and bearing device to form a combined action of shearing and pressing, completing the punching and separation of the lead frame in one go, and improving the flatness of the cross section.

[0016] The replaceable cutting pressure blade has a 0.1mm thin film pressure matrix embedded at the bottom to draw a cloud map of the blade edge fit in real time. Once a local pressure drop of more than 5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal.

[0017] Preferably, the upper die stamping and cutting composite device further includes a transverse positioning damping device that is inserted into the inner cavity of the transverse mounting sleeve.

[0018] Preferably, the lateral positioning damping device includes a servo motor and a double-horn positioning head installed at the other end of the servo motor. Damping spring sleeves are installed on both sides of the side end face edge of the double-horn positioning head, and a damping end cap is installed at the other end of the damping spring sleeve.

[0019] Preferably, the double-horn positioning head is configured with a double-protruding horn-shaped structure, and the double-horn positioning head is a component made of alloy material;

[0020] The servo motor converts the rotational motion into lateral thrust, causing the double-horn positioning head to be horizontally pressed against the rear end wall of the workpiece, achieving lateral positioning before stamping and eliminating the micro-movement of the lead frame caused by the tension of the strip.

[0021] The double-horn positioning head has two protruding horns that embed into the edge of the component while tightening, forming a mechanical lock to prevent material from shrinking back at the moment of cutting and to ensure the perpendicularity of the cut.

[0022] The damping spring sleeve and the damping end cap form a progressive damping pair. When the punch press return servo motor removes its thrust, the two apply reverse friction to the rebound of the double-corner positioning head, changing the retraction speed from instantaneous to gradual. This avoids the sudden detachment of the corners, which could cause secondary impacts on the components or springs, and reduces the height of lateral burrs. At the same time, it reduces the impact fatigue of the double-corner positioning head body and extends its service life.

[0023] Preferably, the upper die stamping and cutting composite device further includes a quick-change waste collection device with replaceable and replaceable cutting pressure blades. The quick-change waste collection device includes a collection box frame and a horn-shaped waste collection cavity installed on the front end face of the collection box frame. A one-way hinged stop tongue is installed on one side of the outer end face of the horn-shaped waste collection cavity, and a comb tooth bottom plate is installed at the bottom of the horn-shaped waste collection cavity.

[0024] Preferably, the quick-change waste collection device further includes three sets of waste position sensing comb teeth that are laterally opened at the bottom of the comb tooth base plate;

[0025] The collection box frame directly replaces the replaceable cutting and pressing knife, and rises and falls synchronously with the punch press slide to ensure that the chip collection port is always at zero distance from the cutting edge exit, so that the chip is captured as soon as it leaves the mother body.

[0026] The front end of the horn-shaped chip collection chamber is open, forming a horn-shaped chip collection chamber that guides and buffers the high-speed flying copper chips. The electrostatic spray coating inside the chamber reduces copper chip adhesion and prevents the cable tray from bridging.

[0027] The one-way hinged stop tongue is a single-sided hinged stop tongue. When the punch moves downward, it automatically closes under air pressure to prevent the collected debris from flowing back. When the punch returns, the stop tongue opens under gravity to guide the debris into the collection bag below, realizing the "one-way gate" function without the need for an external negative pressure fan.

[0028] The bottom plate of the comb tooth has three sets of chip position sensing comb tooth long grooves in the horizontal direction, which not only allows the cooling oil and gas to flow back to the mold, but also cuts the long strip of chip material into short segments of ≤8mm to avoid entanglement; when the collection box is full, the operator only needs to pull out the quick-change chip collection device 29 in the horizontal direction.

[0029] A capacitive chip level sensor is added to the root of the 295 chip level sensor comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, a 4-20mA signal is output to indicate "chip full", thus avoiding overflow and mold jamming.

[0030] The replaceable cutting pressure blade has a 0.1mm thin-film pressure matrix embedded at its bottom, which draws a cloud map of the blade edge fit in real time. Once a local pressure drop of more than 5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal. A capacitive chip level sensor is added to the root of the 295 comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, it outputs a 4-20mA signal to indicate "chip full", avoiding overflow and mold jamming.

[0031] The edge computing box is mounted on the back of the column support and collects five signals: pressure, vision, chip position, temperature, and vibration. Through a lightweight neural network model, it provides a health score within 3ms. If the score is less than 85, it automatically triggers a three-level emergency plan of "deceleration-stop-tool change" to reduce the risk of mold collision.

[0032] Historical data is uploaded to the cloud via a gateway. Transfer learning is used to predict the quality of different material strip batches, and the stamping speed or cutting edge clearance is adjusted in advance to increase the first pass rate from 96% to 99.2%.

[0033] The entire mold is built as a 1:1 digital twin in the cloud. Every time a stamping is performed on site, the twin updates the stress, temperature, and wear in real time. Engineers can remotely view the remaining life through AR glasses. The predictive maintenance cycle has changed from experience-based "weekly inspection" to "on-demand maintenance", and spare parts inventory has decreased by 35%.

[0034] All data is integrated with the factory's MES system and automatically linked to product QR codes, enabling traceability of individual items. If a customer submits a quality complaint, the mold temperature, cutting edge status, and chip height at the time can be restored within 3 minutes to quickly pinpoint the root cause.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. The three-stage rigid guide system of double guide pillars, pressure transition plate and corner lock reduces the lateral offset, material shrinkage and vibration at the moment of cutting to the limit, achieving ±0.02mm zero gap positioning, cross-section perpendicularity <0.5°, burr height reduced by 50%, and the lead frame is formed in one piece without leveling.

[0037] 2. Thin-film pressure matrix + 200fps vision fiber optic + capacitive chip position sensor for online monitoring of cutting edge, material thickness and chip status, edge computing 3ms health score, score <85 automatically triggers the three-level emergency plan of "deceleration-stop-tool change"; cloud digital twin real-time wear mapping, tool change cycle extended by 30% and spare parts inventory reduced by 35%.

[0038] 3. A closed-loop system for the entire stamping-chip collection-data chain, with historical data being used for transfer learning to optimize speed and gap in advance, increasing the first-pass yield from 96% to 99.2%; all data is integrated with MES and bound to product QR codes, restoring mold temperature, cutting edge, and chip height within 3 minutes, reducing the time for locating quality complaints from hours to minutes, providing a replicable intelligent precision stamping paradigm for the lead frame industry. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of a composite die for stamping and cutting lead frames and a waste collection device proposed in this invention.

[0040] Figure 2 This is a schematic diagram of the lower die base device of a composite die for stamping and cutting of a lead frame and a waste collection device proposed in this invention.

[0041] Figure 3 This is a schematic diagram of the lower die positioning and material-bearing device of a composite die for stamping and cutting of lead wire frame and a waste collection device proposed in this invention;

[0042] Figure 4 This is a schematic diagram of the upper die stamping and cutting composite device of the lead frame stamping and cutting composite mold and waste collection equipment proposed in this invention;

[0043] Figure 5 This is a schematic diagram of the transverse positioning damping device of a composite die for stamping and cutting of lead frame and a waste collection device proposed in this invention.

[0044] Figure 6 This is a schematic diagram of the quick-change waste collection device structure of a composite die for stamping and cutting of lead wire frame and a waste collection device proposed in this invention;

[0045] Figure 7 This is a schematic diagram of the comb tooth base plate and chip position sensing comb tooth structure of a lead frame stamping and cutting composite mold and waste chip collection device proposed in this invention.

[0046] In the diagram: 1. Lower die base device; 11. Base; 12. Lower die positioning and material support device; 121. Material support base; 122. Clamping platform; 123. Boss clearance recess; 13. Column bracket; 14. Horizontal mounting sleeve; 15. Top beam; 16. Stamping drive interface; 2. Upper die stamping and cutting composite device; 21. Main slide block; 22. Intermediate pad; 23. Central tie rod; 24. Double guide column sleeve; 25. 26. Side guide post; 27. Pressure transition plate; 28. Replaceable cutting and pressing knife; 29. ​​Lateral positioning damping device; 20. Servo motor; 21. Double-horn positioning head; 22. Damping spring sleeve; 23. Damping end cap; 24. Quick-change waste chip collection device; 25. Collection box frame; 26. Horn-shaped chip collection chamber; 27. One-way hinged stop tongue; 28. Comb tooth base plate; 29. ​​Chip position sensing comb tooth. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Reference Figures 1-7 Example 1: A composite die for stamping and cutting of lead frame and a waste collection device, including a lower die base device 1 and an upper die stamping and cutting composite device 2. The upper die stamping and cutting composite device 2 is installed in the inner cavity of the lower die base device 1. The lower die base device 1 includes a base 11 and a lower die positioning and material support device 12 installed at the edge of the upper end face of the base 11. A column bracket 13 is vertically installed at the other edge of the upper end face of the base 11. A transverse mounting sleeve 14 is installed at the bottom center of the side end face of the column bracket 13. A top beam 15 is installed on the top of the column bracket 13. A stamping drive interface 16 is installed on the front end face of the top beam 15.

[0049] The lower mold positioning and material support device 12 includes a material support base 121 and a clamping platform 122 installed on the upper surface of the material support base 121. Bosses and recesses 123 are provided on both sides of the upper surface of the clamping platform 122.

[0050] The material support base 121 directly bears the downward punching force of the replaceable cutting pressure knife 27, ensuring zero deflection of the entire lower die during the cutting process;

[0051] The flat upper surface of the clamping platform 122 fits against the bottom of the replaceable cutting pressure knife 27 to form upper and lower clamping surfaces, pressing the lead frame into a stationary state to prevent the strip from slipping or warping during punching.

[0052] The two recesses of the boss 123 correspond one-to-one with the pre-formed protrusions on the lead frame, which not only allows the boss to sink completely without being damaged, but also provides four-point positioning in the horizontal direction, so that the positional error of each lead relative to the cutting edge is controlled within ±0.02mm, achieving zero-gap precision cutting, and no further leveling is required.

[0053] Example 2: The upper die stamping and cutting composite device 2 includes a main slide block 21 and an intermediate pad 22 installed at the bottom of the main slide block 21. A central tie rod 23 is inserted through the bottom of the intermediate pad 22. Two sets of side guide pillars 25 are vertically installed on the two end faces of the main slide block 21. The central tie rod 23 and the side guide pillars 25 are inserted through the inner cavity of the double guide pillar sleeve 24.

[0054] After receiving power from the external punch press, the main slide block 21 distributes the linear reciprocating motion to the central tie rod 23 and the side guide post 25 in one go, ensuring that there is no lateral offset in the up and down stroke;

[0055] The central tie rod 23 directly transfers the stroke of the main slider 21 to the pressure transition plate 26. It and the side guide post 25 pass through the inner cavity of the double guide post sleeve 24 to form a double guide post structure, which guides and resists the transverse shear force, so that the cutting edge is always perpendicular to the lead frame and reduces burrs.

[0056] Example 3: The upper die stamping and cutting composite device 2 also includes a pressure transition plate 26 installed at the bottom of the central tie rod 23 and the side guide post 25, and a replaceable cutting pressure knife 27 is installed at the bottom of the pressure transition plate 26.

[0057] The pressure transition plate 26 converts the concentrated tensile force into surface pressure and applies it evenly to the replaceable cutting pressure knife 27, thus avoiding local overload and chipping of the cutting edge.

[0058] After the lower surface of the replaceable cutting and pressing blade 27 is attached to the upper end face of the lower die positioning and material receiving device 12, a combined action of shearing and pressing is formed, which completes the punching and separation of the lead frame in one go, and the flatness of the cross section is improved.

[0059] The replaceable cutting pressure blade 27 has a 0.1mm thin film pressure matrix embedded at the bottom to draw a cloud map of the blade edge fit in real time. Once a local pressure drop of more than 5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal.

[0060] Example 4: The upper die stamping and cutting composite device 2 also includes a transverse positioning damping device 28 that is inserted into the inner cavity of the transverse mounting sleeve 14.

[0061] The lateral positioning damping device 28 includes a servo motor 281 and a double-horn positioning head 282 installed at the other end of the servo motor 281. Damping spring sleeves 283 are installed on both sides of the side end face edge of the double-horn positioning head 282, and a damping end cap 284 is installed at the other end of the damping spring sleeve 283.

[0062] The double-horn positioning head 282 is configured with a double protruding horn-shaped structure and is a component made of alloy material;

[0063] The servo motor 281 converts the rotary motion into lateral thrust, causing the double-horn positioning head 282 to horizontally press against the rear end wall of the workpiece, achieving lateral positioning before stamping and eliminating the micro-movement of the lead frame caused by the tension of the strip.

[0064] The double-horn positioning head 282 has two protruding horns that embed into the edge of the component while tightening, forming a mechanical lock to prevent material from shrinking back at the moment of cutting and to ensure the perpendicularity of the cut.

[0065] The damping spring sleeve 283 and the damping end cap 284 form a progressive damping pair. When the punch press return servo motor 281 removes its thrust, the two apply reverse friction to the rebound of the double-horn positioning head 282, so that the retraction speed changes from instantaneous to gradual release, avoiding the sudden disengagement of the horns and causing secondary impacts or springs on the components. The height of the lateral burrs is reduced, and the impact fatigue of the double-horn positioning head 282 body is reduced, thus extending its service life.

[0066] Example 5: The upper die stamping and cutting composite device 2 also includes a quick-change waste collection device 29 that can replace the replaceable cutting pressure knife 27. The quick-change waste collection device 29 includes a collection box frame 291 and a horn-shaped waste collection cavity 292 installed on the front end face of the collection box frame 291. A one-way hinged stop tongue 293 is installed on one side of the outer end face of the horn-shaped waste collection cavity 292, and a comb tooth bottom plate 294 is installed at the bottom of the horn-shaped waste collection cavity 292.

[0067] The quick-change waste collection device 29 also includes three sets of waste position sensing comb teeth 295 that are horizontally opened at the bottom of the comb tooth base plate 294;

[0068] The collection box frame 291 directly replaces the replaceable cutting and pressing knife 27, and rises and falls synchronously with the punch press slide to ensure that the chip collection port is always at zero distance from the cutting edge exit, so that the chip is captured as soon as it leaves the mother body.

[0069] The front end of the horn-shaped chip collection chamber 292 is open, forming a horn-shaped chip collection chamber, which guides and buffers the high-speed flying copper chips. The electrostatic spray coating inside the chamber reduces the adhesion of copper chips and prevents the cable tray from bridging.

[0070] The one-way hinged stop tongue 293 is a single-sided hinged stop tongue. When the punch moves downward, it automatically closes under air pressure to prevent the collected debris from flowing back. When the punch returns, the stop tongue opens under gravity to guide the debris into the collection bag below, realizing the "one-way gate" function without the need for an external negative pressure fan.

[0071] Example 6: The bottom plate 294 of the comb tooth has three sets of chip position sensing comb teeth 295 with long grooves in the horizontal direction. This allows the cooling oil and gas to flow back to the mold and cuts the long strip of chips into short segments of ≤8mm to avoid entanglement. When the collection box is full, the operator only needs to pull out the quick-change chip collection device 29 in the horizontal direction.

[0072] A capacitive chip level sensor is added to the root of the 295 chip level sensor comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, a 4-20mA signal is output to indicate "chip full", thus avoiding overflow and mold jamming.

[0073] The replaceable cutting pressure blade 27 has a 0.1mm thin-film pressure matrix embedded at its bottom, which draws a cloud map of the blade edge fit in real time. Once a local pressure drop of >5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal. The chip position sensing comb 295 has a capacitive chip position sensor added to the root of the comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, it outputs a 4-20mA signal to indicate "chip full", avoiding overflow and mold jamming.

[0074] The edge computing box is mounted on the rear side of the column support 13. It collects five signals: pressure, vision, chip position, temperature, and vibration. Through a lightweight neural network model, it provides a health score within 3ms. If the score is less than 85, it automatically triggers a three-level emergency plan of "deceleration-stop-tool change" to reduce the risk of mold collision.

[0075] Example 7: Historical data is uploaded to the cloud via a gateway. Transfer learning is used to predict the quality of different material strip batches and adjust the stamping speed or cutting edge clearance in advance to increase the first pass rate from 96% to 99.2%.

[0076] The entire mold is built as a 1:1 digital twin in the cloud. Every time a stamping is performed on site, the twin updates the stress, temperature, and wear in real time. Engineers can remotely view the remaining life through AR glasses. The predictive maintenance cycle has changed from experience-based "weekly inspection" to "on-demand maintenance", and spare parts inventory has decreased by 35%.

[0077] All data is integrated with the factory's MES system and automatically linked to product QR codes, enabling traceability of individual items. If a customer submits a quality complaint, the mold temperature, cutting edge status, and chip height at the time can be restored within 3 minutes to quickly pinpoint the root cause.

[0078] In summary: After receiving power from the external punch press, the main slide block 21 distributes the linear reciprocating motion to the central tie rod 23 and the side guide post 25 in one go, ensuring that there is no lateral offset in the up and down stroke;

[0079] The central tie rod 23 directly transfers the stroke of the main slider 21 to the pressure transition plate 26. It and the side guide post 25 pass through the inner cavity of the double guide post sleeve 24 to form a double guide post structure, which guides and resists the transverse shear force, so that the cutting edge is always perpendicular to the lead frame and reduces burrs.

[0080] The pressure transition plate 26 converts the concentrated tensile force into surface pressure and applies it evenly to the replaceable cutting pressure knife 27, thus avoiding local overload and chipping of the cutting edge.

[0081] After the lower surface of the replaceable cutting and pressing blade 27 is attached to the upper end face of the lower die positioning and material receiving device 12, a combined action of shearing and pressing is formed, which completes the punching and separation of the lead frame in one go, and the flatness of the cross section is improved.

[0082] The replaceable cutting pressure blade 27 has a 0.1mm thin film pressure matrix embedded at the bottom to draw a cloud map of the blade edge fit in real time. Once a local pressure drop of more than 5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal.

[0083] The servo motor 281 converts the rotary motion into lateral thrust, causing the double-horn positioning head 282 to horizontally press against the rear end wall of the workpiece, achieving lateral positioning before stamping and eliminating the micro-movement of the lead frame caused by the tension of the strip.

[0084] The double-horn positioning head 282 has two protruding horns that embed into the edge of the component while tightening, forming a mechanical lock to prevent material from shrinking back at the moment of cutting and to ensure the perpendicularity of the cut.

[0085] The damping spring sleeve 283 and the damping end cap 284 form a progressive damping pair. When the punch press return servo motor 281 removes its thrust, the two apply reverse friction to the rebound of the double-horn positioning head 282, so that the retraction speed changes from instantaneous to gradual release, avoiding the sudden disengagement of the horns and causing secondary impacts or springs on the components. The height of the lateral burrs is reduced, and the impact fatigue of the double-horn positioning head 282 body is reduced, thus extending its service life.

[0086] The material support base 121 directly bears the downward punching force of the replaceable cutting pressure knife 27, ensuring zero deflection of the entire lower die during the cutting process;

[0087] The flat upper surface of the clamping platform 122 fits against the bottom of the replaceable cutting pressure knife 27 to form upper and lower clamping surfaces, pressing the lead frame into a stationary state to prevent the strip from slipping or warping during punching.

[0088] The two recesses of the boss give way to the recess 123 correspond one-to-one with the pre-formed protrusions on the lead frame, which not only allows the boss to sink completely without being crushed, but also provides four-point positioning in the horizontal direction, so that the positional error of each lead relative to the cutting edge is controlled within ±0.02mm, achieving zero-gap precision cutting, and no further leveling is required.

[0089] The collection box frame 291 directly replaces the replaceable cutting and pressing knife 27, and rises and falls synchronously with the punch press slide to ensure that the chip collection port is always at zero distance from the cutting edge exit, so that the chip is captured as soon as it leaves the mother body.

[0090] The front end of the horn-shaped chip collection chamber 292 is open, forming a horn-shaped chip collection chamber, which guides and buffers the high-speed flying copper chips. The electrostatic spray coating inside the chamber reduces the adhesion of copper chips and prevents the cable tray from bridging.

[0091] The one-way hinged stop tongue 293 is a single-sided hinged stop tongue. When the punch moves downward, it automatically closes under air pressure to prevent the collected debris from flowing back. When the punch returns, the stop tongue opens under gravity to guide the debris into the collection bag below, realizing the "one-way gate" function without the need for an external negative pressure fan.

[0092] The comb base plate 294 has three sets of chip position sensing comb teeth 295 with long grooves in the horizontal direction. This allows the cooling oil and gas to flow back to the mold and cuts the long strips of chips into short segments of ≤8mm to avoid tangling. When the collection box is full, the operator only needs to pull out the quick-change chip collection device 29 in the horizontal direction.

[0093] A capacitive chip level sensor is added to the root of the 295 chip level sensor comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, a 4-20mA signal is output to indicate "chip full", thus avoiding overflow and mold jamming.

[0094] The replaceable cutting pressure blade 27 has a 0.1mm thin film pressure matrix embedded at the bottom to draw a cloud map of the blade edge fit in real time. Once a local pressure drop of more than 5% occurs, it can be determined that the blade edge is chipped or the material thickness is abnormal.

[0095] A capacitive chip level sensor is added to the root of the 295 chip level sensor comb teeth. When the copper chip accumulation height covers 80% of the tooth depth, a 4-20mA signal is output to indicate "chip full", thus avoiding overflow and mold jamming.

[0096] The edge computing box is mounted on the rear side of the column support 13. It collects five signals: pressure, vision, chip position, temperature, and vibration. Through a lightweight neural network model, it provides a health score within 3ms. If the score is less than 85, it automatically triggers a three-level emergency plan of "deceleration-stop-tool change" to reduce the risk of mold collision.

[0097] Historical data is uploaded to the cloud via a gateway. Transfer learning is used to predict the quality of different material strip batches, and the stamping speed or cutting edge clearance is adjusted in advance to increase the first pass rate from 96% to 99.2%.

[0098] The entire mold is built as a 1:1 digital twin in the cloud. Every time a stamping is performed on site, the twin updates the stress, temperature, and wear in real time. Engineers can remotely view the remaining life through AR glasses. The predictive maintenance cycle has changed from experience-based "weekly inspection" to "on-demand maintenance", and spare parts inventory has decreased by 35%.

[0099] All data is integrated with the factory's MES system and automatically linked to product QR codes, enabling traceability of individual items. If a customer submits a quality complaint, the mold temperature, cutting edge status, and chip height at the time can be restored within 3 minutes to quickly pinpoint the root cause.

[0100] The above describes the entire working principle of this invention.

[0101] In this invention, the installation, connection or setting methods of all the above components are common mechanical methods, and the specific structure, model and coefficient index of all components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0102] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

[0103] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are merely used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A lead frame stamping and cutting compound die and scrap collecting apparatus comprising a lower die base device (1) and an upper die stamping and cutting compound device (2), characterized in that, The inner cavity of the lower die base device (1) is provided with an upper die stamping and cutting composite device (2), the lower die base device (1) comprises a base (11) and a lower die positioning and material receiving device (12) installed at the edge position of the upper end surface of the base (11), a vertical column support (13) is installed at the other side edge position of the upper end surface of the base (11), a horizontal installation sleeve (14) is installed at the center bottom position of the side end surface of the vertical column support (13), a top beam (15) is installed at the top of the vertical column support (13), and a stamping driving interface (16) is installed at the front end surface of the top beam (15).

2. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 1, wherein The lower die positioning and material receiving device (12) comprises a material receiving base (121) and a clamping platform (122) installed at the upper end surface of the material receiving base (121), and boss accommodating recesses (123) are formed at the two side positions of the upper end surface of the clamping platform (122).

3. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 1, wherein The upper die stamping and cutting composite device (2) comprises a main sliding block (21) and an intermediate pad (22) installed at the bottom of the main sliding block (21), a center pull rod (23) is arranged through the bottom of the intermediate pad (22), two groups of side guide columns (25) are vertically installed at the two side end surfaces of the main sliding block (21), and the center pull rod (23) and the side guide columns (25) pass through the inner cavity of a double guide column sleeve (24).

4. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 3, wherein The upper die stamping and cutting composite device (2) further comprises a pressure transition plate (26) installed at the bottom of the center pull rod (23) and the side guide columns (25), and a replaceable cutting pressure material knife (27) is installed at the bottom of the pressure transition plate (26).

5. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 4, wherein The upper die stamping and cutting composite device (2) further comprises a horizontal positioning damping device (28) installed in the inner cavity of the horizontal installation sleeve (14).

6. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 5, wherein The horizontal positioning damping device (28) comprises a servo motor (281) and a double-horn positioning head (282) installed at the other end of the servo motor (281), damping spring sleeves (283) are installed at the side end surface edges of the double-horn positioning head (282), and damping end covers (284) are installed at the other ends of the damping spring sleeves (283).

7. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 6, wherein The double-horn positioning head (282) is provided in a double-protruding horn structure, and the double-horn positioning head (282) is a component made of an alloy material.

8. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 2, wherein The upper die stamping and cutting composite device (2) further comprises a quick-change waste scrap collecting device (29) capable of replacing the replaceable cutting pressure material knife (27), the quick-change waste scrap collecting device (29) comprises a collecting box framework (291) and a horn scrap collecting cavity (292) installed at the front end surface of the collecting box framework (291), a one-way hinged blocking tongue (293) is installed at one side of the outer end surface of the horn scrap collecting cavity (292), and a comb tooth bottom plate (294) is installed at the bottom of the horn scrap collecting cavity (292).

9. The lead frame stamping and cutting compound die and scrap collecting apparatus according to claim 8, wherein The quick-change waste scrap collecting device (29) further comprises three groups of scrap position sensing combs (295) horizontally formed at the bottom of the comb tooth bottom plate (294).

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