Diaphragm Separation Feeding Device for Integrated Circuit Lead Frame Brown Oxidation Electroplating Equipment

Abstract

The present invention relates to the technical field of integrated circuit lead frame electroplating equipment, and particularly to a diaphragm separation feeding device for integrated circuit lead frame brown oxidation electroplating equipment, including a diaphragm removing and feeding mechanism, a steel strip conveying mechanism for clamping and conveying the lead frame, and a flipping and clamping mechanism for feeding the lead frame from the diaphragm removing and feeding mechanism to the steel strip conveying mechanism; the diaphragm on the surface of the lead frame is adsorbed into the waste box by the diaphragm removing and feeding mechanism, and then the flipping and clamping mechanism works; the clamping fixture approaches the lead frame for clamping, and then the rotating shaft continues to rotate so that the clamped lead frame changes from a horizontal posture to a vertical posture, facilitating feeding. During the rotation, the limiting block installed on the rotating shaft is engaged with the limiting seat for stopping, so that the rotation angle is limited, and the clamping fixture will not exceed the range during rotation, facilitating alignment with the steel strip of the steel strip conveying mechanism and being accurately clamped by the steel strip, reducing the risk of dropping and improving the feeding stability.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuit lead frame electroplating equipment, and particularly to a diaphragm separation feeding device for integrated circuit lead frame brown oxidation electroplating equipment. Background Art

[0002] As a chip carrier for integrated circuits, a lead frame is a key structural component that realizes the electrical connection between the internal circuit leads of a chip and the external leads by means of bonding materials (gold wire, aluminum wire, copper wire) to form an electrical loop. It serves as a bridge for connecting to external wires. Most semiconductor integrated circuits require the use of lead frames, so high quality is demanded for lead frame products. Currently, in the semiconductor industry, to avoid scratching the surface of the metal lead frame substrate or having particles or dust fall onto the substrate surface, which may cause quality problems with the lead frame, a protective film is generally attached to the surface of the lead frame substrate.

[0003] After the film of the lead frame is removed, feeding is required, and a clamping feeding mechanism needs to be used for clamping. The Chinese utility model patent with the patent number CN201922317677.9 discloses a lead frame flipping and feeding device for an automatic production line, which includes a frame material transporting mechanism, a frame material flipping mechanism, and a steel strip material clamping frame. The frame material transporting mechanism is provided with a liftable and reciprocally slidable lift feeding plate for transporting the frame material to the position of the frame material flipping mechanism. The frame material flipping mechanism is provided with an openable and closable frame material clamping opening for clamping the frame material. The upper part of the steel strip material clamping frame is provided with an openable and closable steel strip material clamping opening for clamping the steel strip material. The frame material clamping opening can flip towards the steel strip material clamping opening and can slide outwards.

[0004] The feeding mechanism of the above solution realizes efficient positioning feeding through a reciprocally liftable feeding bolt. While the flipping mechanism flips the material, it can also adjust the flipping radius to ensure that the frame material reaches the lower edge of the large steel strip material after flipping. The clamping mechanism of the steel strip material can ensure that the entire steel strip material always remains stable.

[0005] When the steel strip conveys the lead frame, its posture is upright, and the lead frame during film removal is in a horizontal posture. After flipping, it is easy to have a situation where the lead frame and the steel strip cannot be aligned, resulting in the lead frame falling during feeding. Summary of the Invention

[0006] The purpose of the present invention is to provide a diaphragm separation feeding device for integrated circuit lead frame brown oxidation electroplating equipment in view of the deficiencies of the prior art.

[0007] To achieve the above purpose, the technical solution of the present invention is as follows:

[0008] A diaphragm separation and feeding device for brown oxide electroplating equipment for integrated circuit lead frames, comprising a diaphragm removal and feeding mechanism, a steel bar conveying mechanism for clamping and conveying the lead frames, and a flip clamping mechanism for loading the lead frames from the diaphragm removal and feeding mechanism to the steel bar conveying mechanism;

[0009] The membrane removal and loading mechanism includes a loading box for stacking the lead frames with membranes and a waste box for collecting waste membranes, the loading box is provided with a lifting assembly that can longitudinally move to lift the lead frame, a reciprocating film peeling assembly is provided between the loading box and the waste box, and the film peeling assembly includes a suction cup that can longitudinally move to absorb the membrane on the surface of the lead frame;

[0010] The flip clamping mechanism comprises a rotating shaft, a rotating seat is nested on the rotating shaft, the rotating seat is equipped with a clamping fixture for clamping the lead frame and a telescopic driving member for driving the clamping fixture to perform telescopic movement, and also comprises a limit assembly for rotationally limiting the rotating shaft, the limit assembly comprises a limit block arranged on the rotating shaft and a limit seat matched with a stopper of the limit block, the rotating shaft equipped with the limit block rotates under the stopper of the limit seat; the rotating shaft can rotatably drive the clamping fixture to switch back and forth between a horizontal posture and a longitudinal posture;

[0011] The steel bar conveying mechanism includes a steel belt that can clamp the lead frame and a conveying wheel that drives the steel belt to move forward. The steel belt is provided with an opening and closing clamp that can elastically clamp the lead frame. A front top plate of the steel bar that can move laterally against the steel belt is provided on one side of the length direction of the steel belt, and a rear top plate of the steel bar that drives the opening and closing clamp is provided on the other side of the length direction of the steel belt.

[0012] The beneficial effects of the present invention are as follows: the lifting assembly of the diaphragm removal feeding mechanism slowly lifts up the whole pile of lead frames, and the lead frames absorb the diaphragms on the surface of the lead frames to the waste box one by one, and then the clamping mechanism is turned over to work; after the clamping fixture is driven by the rotating shaft to rotate to align with the vertical lead frame, the telescopic drive member drives the clamping fixture to approach the lead frame for clamping, and then the rotating shaft continues to rotate to change the clamped lead frame from a horizontal posture to a vertical posture, which is convenient for loading. During rotation, the limit block installed on the rotating shaft cooperates with the limit seat stopper, so that the rotation angle is limited, and the clamping fixture will not exceed the range during rotation, which is convenient for alignment with the steel belt of the steel bar conveying mechanism and being accurately clamped by the steel belt, thereby reducing the risk of falling and improving the loading stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the diaphragm separation feeding device.

[0014] Figure 2 This is a schematic diagram of the structure of the diaphragm removal feeding mechanism.

[0015] Figure 3This is a schematic structural diagram of the diaphragm removal feeding mechanism from another perspective.

[0016] Figure 4 It is a structural schematic diagram of the connection between the sensing component and the film peeling component.

[0017] Figure 5 It is a structural schematic diagram of the flip clamping mechanism.

[0018] Figure 6 This is a schematic structural diagram of the flip clamping mechanism from another perspective.

[0019] Figure 7 It is a structural schematic diagram of the steel bar conveying mechanism.

[0020] Figure 8 Schematic diagram of the structure of the steel belt.

[0021] Figure 9 Schematic diagram of the partial structure on the back of the steel strip.

[0022] Figure 10 Schematic diagram of the explosion structure of the steel strip.

[0023] Figure 11 This is a structural schematic diagram of the steel bar conveying mechanism from another perspective.

[0024] Figure 12 It is a structural schematic diagram of the connection between the steel bar clamping plate and the conveying mounting plate.

[0025] Reference numerals include:

[0026] 1-Diaphragm removal feeding mechanism

[0027] 11-Feeding box,

[0028] 111- material blocking part, 112- belt conveyor, 113- material blocking rod, 114- material blocking bottom trough,

[0029] 115-sliding rod support plate,

[0030] 12-Lifting components,

[0031] 121-first bottom lifting member, 122-bottom driving plate, 123-lifting rod, 124-lifting block, 125-lifting trough, 126-bottom driving frame, 127-bottom connecting plate,

[0032] 13-Sensor components,

[0033] 131-inductive linear guide, 132-inductive sliding seat, 133-inductive drive board,

[0034] 134-arc groove, 135-swing seat, 136-sensor,

[0035] 14-Removal film assembly,

[0036] 141-film peeling longitudinal plate, 142-film peeling transverse plate, 143-first transverse driving member,

[0037] 144-film peeling sliding seat, 145-suction cup mounting plate, 146-suction cup long groove,

[0038] 147-suction cup, 148-waste box,

[0039] 2-Flip clamping mechanism,

[0040] 21-Rotation axis,

[0041] 211-mounting plate, 212-rotating seat, 213-swinging drive, 214-clamp telescopic drive,

[0042] 215-guide hole,

[0043] 216-guide sleeve, 217-guide rod, 218-guide connecting plate, 219-clamping fixture,

[0044] 22-Limiting component,

[0045] 221-limiting seat, 222-adjusting hole, 223-limiting rod, 224-stop block, 225-buffer,

[0046] 226-compression rod, 227-connecting seat, 228-limiting block, 229-left stop surface, 2291-right stop surface,

[0047] 3-Steel belt,

[0048] 31-Steel sheet,

[0049] 310-transmission hole, 311-circular hole, 312-first mounting slot, 313-second mounting slot,

[0050] 314-driving slot, 315-contact sheet,

[0051] 32- cushion spring, 321- first connecting portion, 322- elastic strip, 323- fixing portion,

[0052] 33-conductive sheet, 331-conductive strip, 332-conductive end, 333-through slot, 334-connecting slot,

[0053] 34-torsion spring set,

[0054] 341-torsion spring, 342-second connecting portion, 343-first clamping portion, 344-second clamping portion,

[0055] 4-Steel bar conveying mechanism,

[0056] 41-Conveyor mounting plate,

[0057] 410-transport wheel, 411-wheel mounting shaft, 412-wheel drive seat, 413-first wheel fixing plate,

[0058] 414-second wheel fixing plate, 415-ratchet, 416-pressing wheel, 417-tension spring,

[0059] 42-Steel bar clamping plate,

[0060] 421-guide roller, 422-first conveying telescopic drive member, 423-steel bar front top plate,

[0061] 424 - steel bar rear top plate, 425 - second conveying telescopic driving member, 426 - supporting pad. DETAILED DESCRIPTION

[0062] The present invention is described in detail below with reference to the accompanying drawings.

[0063] As shown in the figure, the diaphragm separation and loading device of the integrated circuit lead frame brown oxide electroplating equipment includes a diaphragm removal loading mechanism 1, a steel bar conveying mechanism 4 for clamping and conveying the lead frame, and a flip clamping mechanism 2 for loading the lead frame from the diaphragm removal loading mechanism 1 to the steel bar conveying mechanism.

[0064] The membrane removal and loading mechanism 1 comprises a loading box 11 for stacking the lead frames with membranes and a waste box 148 for collecting waste membranes. The loading box 11 is provided with a lifting assembly 12 that can longitudinally move to lift the lead frame. A reciprocating film peeling assembly 14 is provided between the loading box 11 and the waste box 148. The film peeling assembly 14 comprises a suction cup 147 that can longitudinally move to absorb the membrane on the surface of the lead frame.

[0065] The loading box 11 is provided with a belt conveyor along the length direction for transferring the stacked lead frames to the lifting assembly 12. The belt conveyor includes a plurality of belt conveyors 112 arranged at intervals in the loading box 11. The intervals between two adjacent belt conveyors 112 are the same. The width of the loading box 11 is greater than the length of the lead frame. The whole stack of lead frames is placed at the rear end of the loading box 11 and is transferred to the lifting assembly 12 at the front end of the loading box 11 by the plurality of belt conveyors 112.

[0066] A stopper 111 is arranged along the conveyor belt to stop one of the piles of lead frames from moving forward. The stopper 111 includes a plurality of stopper rods 113 that move longitudinally through the conveyor belt. The loading box 11 is provided with a stopper bottom groove 114 for the stopper rods 113 to pass through and rise and fall. A lifting cylinder is installed at the bottom of the loading box 11 to drive the stopper rods 113 to rise and fall. There are two stopper rods 113 that are aligned horizontally to form a straight line, so that the entire pile of lead frames can be flush with the stopper rods 113.

[0067] The loading box 11 is also telescopically installed with a sliding bar pallet 115 that pushes the lead frame laterally to move to cooperate with the blocking rod 113. The side wall of the loading box 11 is provided with a transversely arranged telescopic cylinder, and the telescopic direction of the telescopic cylinder is perpendicular to the conveying direction of the belt conveyor 112. The telescopic cylinder is connected to the sliding bar pallet 115. After the whole pile of lead frames is placed in the loading box 11, the sliding bar pallet 115 aligns the pile of lead frames from the pile to the blocking guide plate, and then under the transfer of the belt conveyor 112, the side of the pile of lead frames is attached to one of the side walls of the lead frame, and the front end is attached to the two blocking rods 113, so that the pile of lead frames maintains an aligned posture when stopped, which is convenient for subsequent neat transportation to the lifting assembly 12. When the lead frames of the lifting assembly 12 are loaded, the blocking rod 113 retracts, and the belt conveyor 112 drives the entire pile of lead frames to be neatly forwarded and transported to the position of the lifting assembly 12 to be lifted and loaded, so that the film can be accurately peeled off during lifting.

[0068] The material lifting assembly 12 includes a plurality of material lifting blocks 124 arranged at intervals and a first bottom lifting member 121 installed at the bottom of the loading box 11. The first bottom lifting member 121 includes a bottom driving plate 122 installed at the bottom of the loading box 11. The bottom driving plate 122 is longitudinally movably installed with a material lifting rod 123 for supporting and connecting the material lifting blocks 124. The bottom of the loading box 11 is provided with a material lifting groove 125 located in the gap between two adjacent belt conveyors 112. The material lifting block 124 can be longitudinally moved. The lead frame located in the loading box 11 is lifted up through the lifting groove 125, and a bottom driving frame 126 is installed at the bottom of the bottom driving plate 122, and a lifting cylinder is installed at the bottom driving frame 126. A bottom connecting plate 127 connected to all the lifting rods 123 is installed on the top of the lifting cylinder, so that all the lifting rods 123 can be lifted and slid along the holes of the bottom driving plate 122, and the lifting block 124 installed on the top of the lifting rod 123 passes through the lifting groove 125 longitudinally to lift up the entire pile of lead frames in place.

[0069] In this embodiment, after the belt conveyor 112 conveys the whole stack of lead frames to the lifting component 12, the lifting component 12 works to lift the whole stack of lead frames, so that the diaphragm on the surface of the lead frame can be adsorbed by the film removing component 14. Subsequently, the flipping and clamping mechanism 2 clamps and flips the lead frame for feeding to the steel bar conveying mechanism 4. For each lead frame removed, the lifting block 124 installed at the top of the lifting rod 123 rises by the height of one lead frame, facilitating the alignment of the flipping and clamping mechanism 2 and the film removing component 14 with the lead frame for precise film removal and clamping.

[0070] The loading box 11 is provided with an induction component 13. The induction component 13 includes an induction linear guide rail 131 arranged along the width direction of the loading box 11. An induction sliding seat 132 is slidably installed on the induction linear guide rail 131. An induction driving plate 133 is installed on the induction sliding seat 132. The induction driving plate 133 is provided with a rotation point and an arc-shaped groove 134. A swing seat 135 with an adjustable angle is installed through the rotation point and the arc-shaped groove 134. An inductor 136 for detecting whether the lead frame is covered with a diaphragm is installed on the swing seat 135.

[0071] In this embodiment, through the sliding cooperation of the induction linear guide rail 131 and the induction sliding seat 132, the lateral position of the inductor 136 installed on the induction sliding seat 132 is adjustable. According to the length dimension of the lead frame, the position of the induction sliding seat 132 is adjusted, so that the inductor 136 can maintain induction with the lead frame. The rotation point is a round hole. The swing seat 135 is provided with a rotating shaft connected to the round hole, so that the swing seat 135 can swing around the round hole, and the swing trajectory is the same as the radian of the arc-shaped groove 134. After the swing is completed, the round hole opened on the swing seat 135 cooperates with the arc-shaped groove 134, and a bolt is inserted for fixation, so that the angle of the inductor 136 installed on the swing seat 135 is adjustable, and it can generate induction with the lead frame more accurately.

[0072] The inductor 136 is an externally purchased P9SD-Q26L-2M sensor, which can be used to detect colors. The diaphragm is white, and most of the lead frames are gold and silver. The diaphragm is attached to the top of the lead frame. When the inductor 136 senses white, it outputs a signal to the film removing component 14 and the flipping and clamping mechanism. After the film removing component 14 sucks away the diaphragm, the flipping and clamping mechanism clamps and flips the lead frame after film removal for feeding to the steel bar conveying mechanism; when the inductor 136 senses gold and silver, it means that the lead frame has no diaphragm. At this time, the film removing component 14 does not need to work and will issue an alarm. There may be a scratch on this lead frame, and the staff needs to detect the yield rate of this lead frame to prevent direct feeding for processing.

[0073] The film peeling assembly 14 includes a film peeling sliding seat 144 that moves between the loading box 11 and the waste box 148. A horizontally arranged suction cup mounting plate 145 is installed on the film peeling sliding seat 144. A suction cup long groove 146 is formed in the suction cup mounting plate 145 along the length direction. The suction cup member 147 is adjustably installed on the suction cup mounting plate 145 with the suction cup long groove 146. The film peeling assembly 14 further includes a longitudinally arranged film peeling longitudinal plate 141. A lifting cylinder is installed on the film peeling longitudinal plate 141. Driven by the lifting of the lifting cylinder, the film peeling transverse plate 142 can move longitudinally. A first transverse driving member 143 for driving the film peeling sliding seat 144 to reciprocate is arranged along the length direction of the film peeling transverse plate 142. The first transverse driving member 143 is a telescopic cylinder.

[0074] In this embodiment, after the lead frame is lifted by the lifting component 12, the first transverse driving member 143 drives the film peeling sliding seat 144 installed on the film peeling transverse plate 142 to approach the loading box 11. The suction cup member 147 installed on the suction cup mounting plate 145 is longitudinally aligned with the lead frame through the silicone suction cup. Subsequently, driven by the lifting of the lifting cylinder, the film peeling transverse plate 142 can move longitudinally closer to the lead frame. The lifting component 12 simultaneously jacks up the lead frame close to the suction cup member 147, so that the suction cup member 147 adsorbs the diaphragm on the top surface of the lead frame. Then it rises and is transferred horizontally. When the suction cup member 147 reaches above the waste box 148, it is driven by the lifting of the lifting cylinder to put the film peeling into the waste box 148. In addition, according to the length of the lead frame, the position of the suction cup member 147 can be adjusted. The suction cup member 147 is horizontally adjusted through the suction cup long groove 146, so that after the suction cup mounting plate 145 moves to the loading box 11, the suction cup member 147 can be located in the middle part, and the diaphragm can be accurately adsorbed during adsorption, which is convenient for accurate film peeling.

[0075] The flipping and clamping mechanism 2 includes a rotating shaft 21. A pair of parallel and spaced-apart mounting vertical plates 211 are nested on the rotating shaft 21. A rotating seat 212 is nested on the rotating shaft 21. The rotating seat 212 is located between the two mounting vertical plates 211. A swinging driver 213 for driving the rotating shaft 21 to rotate is installed on one mounting vertical plate 211. The swinging driver 213 is an externally purchased FESTO vane type swinging cylinder in the prior art. Its driving end is connected to the rotating shaft 21 to drive the rotating shaft 21 to rotate between the two mounting vertical plates 211.

[0076] The rotating seat 212 is equipped with a material clamping fixture 219 for clamping the lead frame and a fixture telescopic driving member 214 for driving the material clamping fixture 219 to perform telescopic movement. The fixture telescopic driving member 214 is a telescopic cylinder. The piston rod of the telescopic cylinder can slidably pass through the rotating seat 212 and is connected to the material clamping fixture 219. The rotating seat 212 is provided with two guiding holes 215. Guide sleeves 216 are respectively nested in the guiding holes 215. A guiding rod 217 is slidably installed in the guide sleeve 216. One end of the guiding rod 217 is the material clamping fixture 219. A guiding connecting plate 218 is arranged at the other end between the two guiding rods 217, so that the stability of the material clamping fixture 219 during telescopic sliding is further improved and it is not easy to shift.

[0077] In this embodiment, driven by the fixture telescopic driving member 214, the material clamping fixture 219 moves along the length direction of the guiding rod 217, so that the material clamping fixture 219 can telescopically extend and retract; after the processed lead frame reaches the loading box in the waiting loading area, the lead frames in the loading box are horizontally arranged transversely. After the material clamping fixture 219 of the loading mechanism rotates to align with the lead frame under the drive of the rotating shaft 21, the fixture telescopic driving member 214 drives the material clamping fixture 219 to approach the lead frame and clamp it by means of vacuum adsorption. Subsequently, the fixture telescopic driving member 214 drives the material clamping fixture 219 to retract, and the rotating shaft 21 continues to rotate, so that the clamped lead frame changes from a vertical posture to a horizontal posture, which is convenient for loading to a specified position.

[0078] Another mounting vertical plate 211 is provided with a limiting component 22 for rotationally limiting the rotating shaft 21. The limiting component 22 includes a limiting block 228 arranged on the rotating shaft 21 and a limiting seat 221 that is in a stop fit with the limiting block 228. Adjusting holes 222 are respectively opened at both ends of the limiting seat 221. A limiting rod 223 that can reciprocally move along the adjusting hole 222 is installed in the adjusting hole 222. The rotating shaft 21 equipped with the limiting block 228 rotates under the stop of the limiting rod 223 on the limiting seat 221, so that the rotation angle is limited, and the material clamping fixture 219 will not exceed the range during rotation, which is convenient for aligning with the lead frame during material clamping and can be horizontally placed at a specified position during loading, ensuring the loading quality.

[0079] Preferably, the limiting rods 223 are respectively installed at both ends of the limiting seat 221, and the limiting rods 223 are parallel to each other. The limiting rods 223 are threaded rods, and the adjusting holes 222 are threaded holes. A stop block 224 that is in a stop fit with the limiting block 228 is formed at one end of the limiting rod 223; when the position of the material clamping fixture 219 is offset after the material clamping fixture 219 is flipped in place, the position of the limiting rod 223 in the adjusting hole 222 can be adjusted, and one of the limiting rods 223 is appropriately telescopically adjusted, so that the limited area of the limiting block 228 during flipping changes, so as to achieve the effect of straightening, which is convenient for aligning with the lead frame and the loading position.

[0080] Since the lead frame is in a vertical posture in the area to be loaded, and the receiving station is usually arranged horizontally, the lead frame after clamping needs to be changed from a vertical posture to a horizontal posture, so it needs to be flipped by 90°. To ensure that the clamping fixture 219 is flipped by 90° each time, a connecting seat 227 for connecting a limit block 228 is installed at one end of the rotating shaft 21. The cross-section of the limit block 228 is an isosceles trapezoid. The limit block 228 is formed with a left stop surface 229 and a right stop surface 2291. The left stop surface 229 and the right stop surface 2291 are perpendicular to each other. The limit block 228 swings between the two limit rods 223 as the rotating shaft 21 rotates, that is, the left stop surface 229 is in stop cooperation with the limit block 228 at the end of one of the limit rods 223, and the right stop surface 2291 is in stop cooperation with the limit block 228 at the end of the other limit rod 223. When the lengths of the two limit rods 223 extending out of the limit seat 221 are the same, the limit block 228 swings between the two limit rods 223. Therefore, the angle of each swing is 90°, so that the lead frame in a horizontal posture can be changed to a vertical posture, which is convenient for loading.

[0081] Preferably, the limiting component 22 further includes a buffer 225 installed on the limiting seat 221. The buffer 225 is an externally purchased SMC hydraulic buffer 225. The buffer 225 includes a compression rod 226 that is buffered and retracted by force; when the limit block 228 rotates, when the left stop surface 229 and the right stop surface 2291 contact the stop block 224 of the limit rod 223, a collision will occur, and the clamping fixture 219 is likely to generate a relatively large vibration, and it is easy to damage the limit rod 223 and the limit block 228. In this embodiment, a buffer 225 is installed on the limit seat 221, and the length of the compression rod 226 extending out of the compression rod 226 is longer than the length of the limit rod 223 extending out. Therefore, when the limit block 228 swings between the two limit rods 223, it first contacts the compression rod 226 of the buffer 225 before swinging to abut against the limit rod 223 of the limit seat 221. The compression rod 226 is buffered and retracted by force, so that when the limit block 228 contacts the limit seat 221, it has a buffering effect, which can reduce the impact force of the collision, protect the limit seat 221 and the limit block 228, and reduce the vibration amplitude.

[0082] The steel bar conveying mechanism includes a steel strip 3 that can clamp the lead frame and a conveying wheel assembly that drives the steel strip 3 to move forward. The steel strip 3 includes a steel sheet 31. Along the length direction at the bottom of the steel sheet 31, a plurality of contact pieces 315 that contact the plate edge of the lead frame are formed. Along the length direction on the front surface of the steel sheet 31, a plurality of torsion spring groups 34 are arranged. One end of the torsion spring group 34 is bent to form a first clamping portion 343 and a second clamping portion 344 that pass through the front surface of the steel sheet 31 and elastically clamp the lead frame on the back surface of the steel sheet 31. A conductive sheet 33 is also installed on the front surface of the steel sheet 31. The conductive sheet 33 is formed with a conductive bar 331 that is bent downward. The end of the conductive bar 331 is formed with a conductive end 332 that makes conductive contact with the front surface of the lead frame. The back surface of the steel sheet 31 faces the lead frame feeding area.

[0083] When clamping the lead frame, the torsion spring group 34 is driven so that the first clamping portion 343 and the second clamping portion 344 are respectively away from the back surface of the steel sheet 31, forming a gap for the plate edge of the lead frame to be inserted. Subsequently, the torsion spring group 34 is loosened, and the bent first clamping portion 343 and second clamping portion 344 elastically clamp the lead frame on the back surface of the contact piece 315 of the steel sheet 31. At this time, the conductive sheet 33 installed on the steel sheet 31 contacts the front surface of the lead frame through the conductive end 332 of the bent conductive bar 331, making both the front surface and the back surface of the lead frame conductive. When passing through the continuous electroplating tank, metal ions in the electroplating solution can quickly dissociate onto the front surface and the back surface of the lead frame for electroplating, improving the electroplating efficiency and the electroplating effect.

[0084] Specifically, the steel sheet 31 is provided with a cushion spring 32 for installing the conductive sheet 33. The cushion spring 32 includes two elastic strips 322 and a first connecting portion 321 that is bent and formed between the two elastic strips 322 and is connected to the steel sheet 31.

[0085] The torsion spring group 34 includes two torsion springs 341 and a second connecting portion 342 that connects the two torsion springs 341. The second connecting portion 342 is bent and formed at the top ends of the two torsion springs 341. The first clamping portion 343 is formed at the bottom end of one of the torsion springs 341, and the second clamping portion 344 is formed at the bottom end of the other torsion spring 341, forming the torsion spring group 34 for elastically clamping the lead frame.

[0086] The steel sheet 31 is respectively formed with a first installation groove 312 for installing the first connecting portion 321 and a second installation groove 313 for installing the second connecting portion 342 along the length direction. The first installation groove 312 and the second installation groove 313 are arranged alternately on the steel sheet 31. The torsion spring group 34 passes through the second installation groove 313 of the steel sheet 31 through the bent second connecting portion 342, so that the end of the second connecting portion 342 abuts against the back of the steel sheet 31, enabling the torsion spring group 34 to be installed.

[0087] In addition, a driving groove 314 longitudinally aligned with the contact piece 315 is formed in the steel sheet 31 along the length direction. The first clamping portion 343 and the second clamping portion 344 of the torsion spring group 34 respectively pass through the driving groove 314 from the front of the steel sheet 31 and elastically fit against the back of the contact piece 315. The body of the torsion spring 341 is located on the front of the steel sheet 31. The portion for clamping the lead frame and the second connecting portion 342 for installing the torsion spring 341 are both located on the back of the steel sheet 31 through the second installation groove 313, realizing the installation of the torsion spring group 34 on the steel sheet 31.

[0088] Applying a thrust force to the first clamping portion 343 and the second clamping portion 344 respectively from the front makes the first clamping portion 343 and the second clamping portion 344 respectively move away from the back of the contact piece 315, forming a gap for the insertion of the plate edge of the lead frame. Subsequently, when the thrust force is withdrawn, under the elastic drive of the torsion spring 341, the first clamping portion 343 and the second clamping portion 344 respectively move close to the back of the contact piece 315, realizing the elastic clamping of the lead frame on the contact piece 315.

[0089] The conductive sheet 33 is formed with a connection groove 334 that is coaxially aligned with the first installation groove 312 and through which the bent first connection portion 321 passes. The bottom portions of the two elastic strips 322 are respectively bent to form fixing portions 323 that pass through the driving groove 314. The conductive sheet 33 is formed with a through groove 333 that is coaxially aligned with the driving groove 314 and through which the bent fixing portion 323 passes, and the conductive sheet 33 is elastically clamped on the steel sheet 31.

[0090] When installing the conductive sheet 33, the conductive sheet 33 is placed on the front of the steel sheet 31, making the connection groove 334 coaxially aligned with the first installation groove 312 of the steel sheet 31, and the through groove 333 coaxially aligned with the driving groove 314 of the steel sheet 31. The bent first connection portion 321 of the cushion spring 32 passes through the first installation groove 312 and the connection groove 334 in sequence and abuts against the back of the steel sheet 31, fixing the top of the conductive sheet 33 to the steel sheet 31; the fixing portions 323 bent at the ends of the elastic strips 322 respectively pass through the corresponding through grooves 333 and the driving groove 314 of the steel sheet 31 and abut against the back of the steel sheet 31, fixing the bottom of the conductive sheet 33 to the steel sheet 31, thereby realizing the fixation of the entire conductive sheet 33.

[0091] Preferably: the bending direction of the conductive strip 331 is towards the clamped lead frame. The conductive strip 331 is a metal strip with a certain deformation force, and its conductive end 332 at the bottom always fits against the clamped lead frame to realize front-side conduction. The first clamping portion 343 and the second clamping portion 344 are formed by processing conductive metal materials and are in contact with the back of the lead frame to realize back-side conduction. During electroplating, both the front and back of the lead frame can be electroplated, and the electroplating effects are basically close, improving the electroplating quality of the lead frame.

[0092] Preferably, a plurality of transmission holes 310 are arranged at equal intervals along the length direction of the steel sheet 31. The transmission holes 310 can be in transmission cooperation with the rotating ratchet wheel, so that the steel sheet 31 can be advanced in a progressive manner and pass through the continuous electroplating tanks for electroplating in sequence.

[0093] Preferably, a plurality of circular holes 311 are formed along the length direction of the steel sheet 31. The circular holes 311 can reduce the use of materials and lower the manufacturing cost.

[0094] The steel strip conveying mechanism 4 further includes a conveying mounting plate 41 for guiding and conveying the steel strip 3. A pair of mounting vertical plates 211 of the flipping clamping mechanism 2 are fixedly mounted at the bottom of the conveying mounting plate 41. A wheel mounting shaft 411 is fixedly arranged along the length direction of the conveying mounting plate 41. Wheel driving seats 412 are slidably mounted at both ends of the wheel mounting shaft 411. The wheel driving seats 412 are slidably connected to the wheel mounting shaft 411 through mounting holes. A horizontally arranged telescopic cylinder is mounted on the top of the conveying mounting plate 41. The telescopic cylinder is connected to one of the wheel driving seats 412. Under the drive of the telescopic cylinder, the distance between the two wheel driving seats 412 can be adjusted. The steel strip 3 forms a straight line between the two wheel driving seats 412, which is convenient for loading the lead frame.

[0095] The conveying wheel member 410 includes a first wheel fixing plate 413 and a second wheel fixing plate 414 mounted on the wheel driving seat 412. A ratchet wheel 415 meshing with the transmission hole of the steel strip 3 is mounted on the first wheel fixing plate 413. A pressing wheel 416 for pressing the steel strip 3 onto the ratchet wheel 415 is mounted on the second wheel fixing plate 414. A tension spring 417 is mounted between the second wheel fixing plate 414 and the first wheel fixing plate 413. Under the elastic drive of the tension spring 417, the second wheel fixing plate 414 approaches the first wheel fixing plate 413, so that the pressing wheel 416 mounted on the second wheel fixing plate 414 presses the passing steel strip 3 tightly against the ratchet wheel 415, which is convenient for the ratchet wheel 415 to keep in contact with and mesh with the lead frame for transmission. The steel strip 3 advances along the length direction under the transmission of the ratchet wheel 415 and the pressing wheel 416.

[0096] The steel strip 3 is provided with a clamping opening member that can elastically clamp the lead frame in an openable and closable manner. The clamping opening member is the distance formed by the first clamping portion 343 and the second clamping portion 344 of the torsion spring group 34 and the contact piece 315. When opened, since the flipping clamping mechanism flips from bottom to top, the lead frame can just be inserted into the distance formed by the first clamping portion 343, the second clamping portion 344 and the contact piece 315, and the lead frame can be accurately clamped by the steel strip 3.

[0097] A steel bar clamping plate 42 for guiding the steel strip 3 to pass through with a gap is installed at the bottom of the conveying mounting plate 41. A plurality of guiding rolling wheels 421 that are in rolling fit with the top edge of the steel strip 3 are arranged along the length direction on one of the steel bar clamping plates 42. Initially, the steel strip 3 enters the gap between the two steel bar clamping plates 42 and is in rolling fit with the top edge of the steel strip 3 through the guiding rolling wheels 421 to prevent the steel strip 3 from shifting upward. A first conveying telescopic driving member 422 is provided at the bottom of the conveying mounting plate 41 to drive one of the steel bar clamping plates 42 to approach the other steel bar clamping plate 42 to clamp the top plate edge of the lead frame. The first conveying telescopic driving member 422 is a telescopic cylinder that moves perpendicular to the advancing direction of the steel strip 3. When the lead frame needs to be loaded onto the steel strip 3, the telescopic cylinder drives one of the steel bar clamping plates 42 to approach the other steel bar clamping plate 42 to clamp the steel strip 3, causing the steel strip 3 to pause. At this time, the lead frame of the flipping and clamping mechanism is flipped 90° upward from bottom to top and extends to be loaded onto the steel strip 3 and clamped.

[0098] Specifically, a steel bar front top plate 423 that laterally moves and abuts against the steel strip 3 is provided on one side in the length direction of the steel strip 3. The steel strip 3 enters and is guided through between the two steel bar clamping plates 42. The steel bar front top plate 423 is in guiding fit with the steel strip 3 to prevent the steel strip from shifting.

[0099] A steel bar rear top plate 424 for driving the opening of the clamping member is provided on the other side in the length direction of the steel strip 3. A second conveying telescopic driving member 425 for driving the rear top plate 424 to approach or move away from the steel strip 3 to drive the clamping member to open and close is also installed at the bottom of the conveying mounting plate 41. The second conveying telescopic driving member 425 is a telescopic cylinder whose telescopic direction is perpendicular to the advancing direction of the lead frame. The second conveying telescopic driving member 425 drives the steel bar rear top plate 424 to approach the steel strip 3 and apply thrusts to the first clamping portion 343 and the second clamping portion 344 respectively from the front, so that the first clamping portion 343 and the second clamping portion 344 are respectively away from the back of the contact piece 315, forming a gap for the plate edge of the lead frame to be inserted; at this time, the back of the steel strip 3 is abutted by the steel bar rear top plate 424, and when a thrust is applied to the steel strip 3, the steel strip 3 will not shift, accurately allowing the top plate edge of the lead frame to enter the distance between the first clamping portion 343 and the second clamping portion 344 and the contact piece 315. Subsequently, the second conveying telescopic driving member 425 retracts, and under the elastic drive of the torsion spring 341, the first clamping portion 343 and the second clamping portion 344 are respectively away from and close to the back of the contact piece 315, realizing the elastic clamping of the lead frame on the contact piece 315.

[0100] A support backing plate 426 for laterally supporting the lead frame loaded onto the steel strip 3 is provided at the bottom of the steel bar clamping plate 42. The support backing plate 426 is vertically arranged and can laterally support the lead frame when it is loaded onto the steel strip 3, preventing the steel strip 3 from swaying left and right after being clamped and causing it to fall.

[0101] In summary, it can be seen that the present invention has the excellent characteristics described above, enabling it to enhance the efficiency that has never been achieved in the prior art during use and thus having practicality, becoming a product with great practical value.

[0102] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A diaphragm separation and feeding device for brown oxide electroplating equipment for integrated circuit lead frames, comprising a diaphragm removal and feeding mechanism, a steel bar conveying mechanism for clamping and conveying the lead frames, and a flip clamping mechanism for feeding the lead frames from the diaphragm removal and feeding mechanism to the steel bar conveying mechanism, characterized in that: The membrane removal and loading mechanism includes a loading box for stacking the lead frames with membranes and a waste box for collecting waste membranes, the loading box is provided with a lifting assembly that can longitudinally move to lift the lead frame, a reciprocating film peeling assembly is provided between the loading box and the waste box, and the film peeling assembly includes a suction cup that can longitudinally move to absorb the membrane on the surface of the lead frame; The flip clamping mechanism comprises a rotating shaft, a rotating seat is nested on the rotating shaft, the rotating seat is equipped with a clamping fixture for clamping the lead frame and a telescopic driving member for driving the clamping fixture to perform telescopic movement, and also comprises a limit assembly for rotationally limiting the rotating shaft, the limit assembly comprises a limit block arranged on the rotating shaft and a limit seat matched with a stopper of the limit block, the rotating shaft equipped with the limit block rotates under the stopper of the limit seat; the rotating shaft can rotatably drive the clamping fixture to switch back and forth between a horizontal posture and a longitudinal posture; The steel bar conveying mechanism includes a steel belt that can clamp the lead frame and a conveying wheel that drives the steel belt to move forward. The steel belt is provided with an opening and closing clamp that can elastically clamp the lead frame. A front top plate of the steel bar that can move laterally against the steel belt is provided on one side of the length direction of the steel belt, and a rear top plate of the steel bar that drives the opening and closing clamp is provided on the other side of the length direction of the steel belt.

2. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 1, characterized in that: The loading box is provided with a belt conveyor along the length direction for transferring the piled lead frames to the lifting assembly, and the belt conveyor is provided with a blocking member along the way for stopping the advancement of one of the piles of lead frames, the blocking member includes a plurality of blocking rods that are longitudinally movable through the belt conveyor, and the loading box is also telescopically installed with a sliding rod support plate that pushes the lead frame laterally to move to cooperate with the blocking rod.

3. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 2, characterized in that: The feeding box is provided with a sensing component, which includes a sensing linear guide arranged along the width direction of the feeding box, the sensing linear guide is slidably installed with a sensing sliding seat, the sensing sliding seat is installed with a sensing drive plate, the sensing drive plate is provided with a rotating point and an arc groove, an adjustable angle swing seat is installed through the rotating point and the arc groove, and the swing seat is installed with a sensor for detecting whether the lead frame is covered with a diaphragm.

4. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 3, characterized in that: The material lifting assembly includes a plurality of lifting blocks arranged at intervals and a first bottom lifting member installed at the bottom of a loading box; a bottom driving plate is installed at the bottom of the loading box; a lifting rod for supporting and connecting the lifting blocks can be longitudinally movably installed on the bottom driving plate; the belt conveyor includes a plurality of belt conveyors arranged at intervals in the loading box; a lifting groove is provided at the bottom of the loading box in the gap between two adjacent belt conveyors; the lifting block can longitudinally pass through the lifting groove to lift the lead frame located in the loading box.

5. The diaphragm separation and loading device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 1, characterized in that: The film peeling assembly includes a film peeling sliding seat that moves between the loading box and the waste box. A suction cup mounting plate arranged horizontally is installed on the film peeling sliding seat. A suction cup long groove is formed in the suction cup mounting plate along the length direction. The suction cup members are adjustably installed on the suction cup mounting plate with the suction cup long groove. The film peeling assembly further includes a longitudinally arranged film peeling longitudinal plate. A longitudinally movable film peeling transverse plate is installed on the film peeling longitudinal plate. A first transverse driving member for driving the film peeling sliding seat to reciprocate is arranged along the length direction of the film peeling transverse plate.

6. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 1, characterized in that: The steel strip conveying mechanism further includes a conveying mounting plate for guiding and conveying the steel strip. A wheel mounting shaft is arranged along the length direction of the conveying mounting plate. Wheel driving seats are slidably installed at both ends of the wheel mounting shaft respectively. The conveying wheel member includes a first wheel fixing plate and a second wheel fixing plate installed on the wheel driving seat. A ratchet wheel meshing with the steel strip for driving is installed on the first wheel fixing plate. A pressing wheel for pressing the steel strip onto the ratchet wheel is installed on the second wheel fixing plate. The second wheel fixing plate elastically approaches the first wheel fixing plate.

7. The diaphragm separation and loading device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 6, characterized in that: Steel strip clamping plates for guiding the steel strip to pass through with gaps are installed at the bottom of the conveying mounting plate. A plurality of guiding rolling wheels that rollingly cooperate with the top edge of the steel strip are arranged along the length direction on one of the steel strip clamping plates. A supporting backing plate for laterally supporting the lead frame loaded onto the steel strip is arranged at the bottom of the steel strip clamping plate. A first conveying telescopic driving member for driving one of the steel strip clamping plates to approach the other steel strip clamping plate to clamp the top plate edge of the lead frame and a second conveying telescopic driving member for driving the steel strip rear top plate to approach or move away from the steel strip to drive the clip opening and closing member to open and close are arranged at the bottom of the conveying mounting plate.

8. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 1, characterized in that: A pair of parallel and spaced-apart mounting vertical plates are nested on the rotating shaft. The limiting seat is installed on one of the mounting vertical plates. A swing driver for driving the rotating shaft to rotate is installed on the other mounting vertical plate. A guiding hole is formed in the rotating seat. A guiding sleeve is nested in the guiding hole. A guiding rod is slidably installed in the guiding sleeve. One end of the guiding rod is connected by a clamp. The number of the guiding holes and the guiding rods is two each. A connecting plate is arranged between the two guiding rods. The telescopic driving member is a telescopic cylinder installed on the rotating seat. The piston rod of the telescopic cylinder slidably passes through the rotating seat and is connected by a clamp.

9. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 8, characterized in that: An adjusting hole is formed in the limiting seat. A limiting rod that can reciprocally move along the adjusting hole is installed in the adjusting hole. A stop portion that stops and cooperates with the limiting block is formed at one end of the limiting rod. The limiting rods are respectively installed at both ends of the limiting seat and are parallel to each other. The limiting assembly further includes a buffer installed on the limiting seat. The buffer includes a compression rod that retracts under force for buffering.

10. The diaphragm separation and feeding device of the integrated circuit lead frame brown oxidation electroplating equipment according to claim 9, characterized in that: The limiting block is nested at one end of the rotating shaft. A left stop surface and a right stop surface are formed on the limiting block. The limiting block swings between the two limiting rods as the rotating shaft rotates. A connecting seat for connecting the limiting block is installed at one end of the rotating shaft. The cross section of the limiting block is an isosceles trapezoid, and the left stop surface and the right stop surface are perpendicular to each other.

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