CN114589252A - Shearing mechanism is used in lead frame production - Google Patents

Abstract

The invention relates to the technical field of semiconductor lead frame processing, in particular to a shearing device for lead frame production; the invention includes a feeding assembly, a shearing assembly and a transfer assembly arranged in sequence, and the shearing assembly is also provided with a collection lead frame spatial position The positioning component and the limit component used to fix the space position of the lead frame on it, the feeding component, the shearing component, the transfer component, the positioning component and the limiting component are all controlled by the control cabinet, and the feeding component includes the feeder, delivery roller and Unwinding roller, shearing assembly includes worktable, base, sheet feeder, leveler, transverse travel unit, longitudinal travel unit, support arm, first electromagnetic rotating seat, punching device and cutting knife, transfer assembly includes setting longitudinal Rack, vertical electric push rod, horizontal plate, electric drive slider, lift electric push rod, second electromagnetic rotating seat, horizontal plate, vacuum suction cup and conveyor; the present invention can effectively solve the problems of quality instability and poor quality in the prior art. lower efficiency, etc.

Description

A shearing device for lead frame production

technical field

The invention relates to the technical field of semiconductor lead frame processing, in particular to a cutting device for lead frame production.

Background technique

With the rapid development of electronic technology, the speed of product update is fast, and in the diversified semiconductor industry, the previous slicing method of the slicing machine was first discharging, leveling, pneumatic finger clamping, rodless cylinder feeding, pneumatic finger clamping, mold cut off. During the production process, it is found that the product quality is unstable, the slice is single, the operation is complicated, and the production efficiency is low.

In the patent document with the application number: CN201020659162.3, a lead frame automatic slicer is disclosed, which is characterized by including a frame, a feeder, a paper delivery device, a controller, a pressure cylinder, a slicing die, a film feeder, a leveling The controller is installed on the top of the frame, and the pressure cylinder, film feeder, and leveler are controlled by the controller respectively. On the upper, the pressure cylinder is fixedly connected with the upper die of the slicing die; the feeder is driven by a motor, and a paper take-up device is installed in the upper and front of the feeding direction, and a photoelectric sensor is installed between the feeder and the leveler at the position to be cut. The sensing signal of the photoelectric sensor is output to the controller; the frame and the feeder are installed on the same platform frame. The product cut out by the utility model is accurate in size, quick to replace the product, and simplifies the slicing process. It solves the problem of unstable product position and size during the slicing process, improves product quality, reduces the waste of manpower and material resources caused by multiple processes, and improves production efficiency.

However, it still has the following shortcomings in practical application:

First, the quality is unstable, because the device in the above-mentioned comparison document can only determine whether the slicer operates by detecting the discharge length of the baseband by the photoelectric sensor, but this method is prone to the problem of inaccurate measurement data, resulting in the cutting The lead frames are of different lengths, and the base tape is not completely straight at the slicing die, but is inclined to a certain extent in the horizontal direction relative to the slicing die.

Second, the efficiency is low, because after the device in the above reference documents cuts the lead frame, it is necessary to manually remove the lead frame from the slicing die.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the shortcomings existing in the prior art and to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a shearing device for lead frame production, comprising a feeding assembly, a shearing assembly and a transfer assembly arranged in sequence;

The shearing component is also provided with a positioning component for collecting the spatial position of the lead frame and a limiting component for fixing the spatial position of the lead frame on it;

The feeding component, shearing component, transfer component, positioning component and limit component are all controlled by the control cabinet.

Further, the feeding assembly includes a feeding machine, a delivery roller and a feeding roller, the feeding machine is arranged on the ground, the delivery roller and the feeding roller are both arranged at the front end of the feeding machine, and the feeding roller is The base tape that has been etched with the lead frame is wound on it, and the protective paper attached to the base tape wound on the unwinding roll is torn and wound on the delivery roll;

The shearing assembly includes a worktable, a base, a film feeder, a leveler, a transverse stroke unit, a longitudinal stroke unit, a support arm, a first electromagnetic rotating seat, a punching device and a cutting knife, and the worktable is arranged at the feeding position. The machine is on the bottom surface of the left end in the horizontal direction, the base is fixed on the table in the middle of the worktable, the top of the worktable and the tabletops at the left and right ends of the base are provided with film feeders. The top of the right end side wall is provided with a leveler, the transverse travel unit is arranged on the ground at the rear end of the workbench, the longitudinal travel unit is arranged on the transverse travel unit and is driven and displaced by the transverse travel unit, and the support arm is arranged on the The longitudinal travel unit is driven and displaced by the longitudinal travel unit, the bottom of the top end of the support arm close to one end of the worktable is provided with a first electromagnetic rotating seat, the punching device is disposed at the bottom of the first electromagnetic rotating seat, and the cutting knife is provided with at the bottom of the stamping unit;

The transfer assembly includes a vertical rack, a vertical electric push rod, a horizontal plate, an electric drive slider, a lifting electric push rod, a second electromagnetic rotating seat, a horizontal plate, a vacuum suction cup and a conveyor, and the longitudinal rack is installed on the On the ground at the rear end of the workbench, the horizontal plate is slidably connected to the longitudinal carriage and is driven and displaced by a longitudinal electric push rod arranged on the longitudinal carriage. The block is slidably connected to the guide rail on the horizontal plate, the lifting electric push rod is arranged at the bottom of the electric drive slider, the second electromagnetic rotating seat is arranged at the bottom of the lifting electric push rod, and the horizontal plate is arranged at the second At the bottom of the electromagnetic rotating base, the plate surface of the bottom of the horizontal plate is densely covered with vacuum suction cups, and the conveyor is arranged at the rear end of the workbench and is located on the ground directly below the longitudinal rack.

Furthermore, the base tape on the unwinding roller passes through the leveler and the two sheet feeders in sequence and is suspended just above the base.

Further, the leveler includes a rotating base mounted on the worktable and a leveling roller rotatably connected to the rotating base;

The film feeder includes a driving seat, a film feeding roller, a gear and a film feeding motor, the driving seat is arranged on the worktable, and two film feeding rollers in an upper and lower symmetrical relationship are rotatably connected to the driving seat. Gears are fixed coaxially on the ends of the sheet feeding rollers extending out of the drive base, two gears on the same drive base are meshed, and any one of the gears is coaxially connected with the motor shaft of the sheet feeding motor;

The transverse travel unit includes a transverse rail plate, a transverse slider, a transverse screw and a transverse motor. The number of the transverse rail plates is at least two and they are arranged in parallel, and the transverse rail plates are all slidably connected with transverse sliders. , the transverse slider drives its displacement under the cooperation of the transverse screw and the transverse motor;

The longitudinal travel unit includes a longitudinal rail plate, a longitudinal slider, a longitudinal screw and a longitudinal motor. The top ends of the transverse sliders are all fixed at the bottom of the longitudinal rail plate, and the longitudinal slider is slidably connected to the longitudinal rail plate. The longitudinal sliding block drives its displacement under the cooperation of the longitudinal screw and the longitudinal motor, and the support arm is fixed on the longitudinal sliding block.

Further, the size of the base is larger than the size of the lead frame on the base tape.

Further, the rotating shafts of the first electromagnetic rotating base and the second electromagnetic rotating are both vertical to the ground, the punching device adopts any one of a pneumatic drive mode or a hydraulic drive mode, and the punching device is surrounded by a cutting knife. There is also a pressure balance hole in the area.

Furthermore, the vacuum suction cups are powered by an external air pump.

Further, the positioning assembly includes a first track plate, a first slider, a first screw, a first motor, a boom, a detection board, a positioning sensor, a camera module, a photoelectric sensor and a pressure sensor, the first The installation stroke direction of the rail plate is longitudinally arranged on the ground at the front end of the workbench, the first sliding block is slidably connected to the first rail plate, and the first sliding block is driven by the cooperation of the first screw rod and the first motor Its displacement, the boom is arranged on the first slider, the detection board is horizontally installed on the lower end of the boom close to one end of the workbench, and the positioning sensor and the camera module are both arranged on the lower end of the detection board. The photoelectric sensor is arranged on the bottom surface between the feeding roller and the leveling roller, and the pressure sensor is arranged in the middle of the upper end surface of the base;

The limit assembly includes a longitudinal limit seat, a limit electric rod, a longitudinal lower pressure plate and a transverse stretching unit. The number of the longitudinal limit seats is two, and each of the longitudinal limit seats is arranged on the base. Between the corresponding film feeder, both ends of the longitudinal limit seat are provided with vertical limit electric push rods, and the top ends of the two limit electric push rods on the same longitudinal limit seat are respectively fixed in the same position. Both ends of the longitudinal pressing plate are pressed down in the longitudinal direction. The transverse stretching unit includes a corner table, a corner block, a guide rod, a second screw and a stretching motor. Both ends of the longitudinal limit block are provided with corner blocks. The two corner blocks at the rear end are slidably connected to the same guide rod, the two corner blocks at the front end of the worktable are screwed on the same second screw rod, and the ends of the guide rod and the second screw rod are both rotatably connected to the worktable On the corresponding corner table, the second screw is driven to rotate by the stretching motor, the central axis of the guide rod and the second screw are in the transverse direction, and the stretching motor and the second screw cooperate to drive two longitudinal limit positions The seat performs synchronous reverse motion symmetrically about the base.

Further, the plane of the upper end of the longitudinal limit seat is not higher than the plane of the upper end of the base, and the base tape between the two film feeders also passes through the space between the longitudinal limit seat and the longitudinal lower platen;

The left end of the worktable is also provided with a recycling assembly controlled by the control cabinet. The recycling assembly includes a recycling machine set on the ground and a recycling roller set at the front end of the recycling machine. The film feeder output base belt at the left end of the worktable is wound around on the recovery roll.

Further, the front end of the control cabinet is provided with a touch display screen, an interface area and a key area. .

Compared with the prior art, the advantages and positive effects of the present invention are:

1. The present invention adopts the design of a positioning component for collecting the spatial position of the lead frame and a limiting component for fixing the spatial position of the lead frame on the shearing component. In this way, the control cabinet can completely and stably attach the base tape at the base to the upper end face of the base through the limit assembly, and then detect the positional relationship data of the lead frame where the base is located relative to the upper end face of the base through the detection assembly. Then, the control cabinet adjusts the projection of the cutting edge of the cutting knife on the base according to the data collected by the detection component to completely coincide with the projection of the edge of the lead frame on the base, so that the punching device drives the cutting knife to cut the tape from the base tape. The lead frame conforms exactly to the preset shape. The effect of effectively improving the quality stability of the cutting lead frame of the product of the present invention is achieved.

2. In the present invention, a transfer assembly is arranged at the cutting assembly, and the transfer assembly includes a vertical carriage, a vertical electric push rod, a horizontal plate, an electric drive slider, an elevating electric push rod, a second electromagnetic rotating seat, a horizontal plate, and a vacuum suction cup. And the conveyor, the longitudinal carriage is installed on the ground at the rear end of the workbench, the horizontal plate is slidably connected to the longitudinal carriage and is driven and displaced by the longitudinal electric push rod set on the longitudinal carriage, and the horizontal plate is provided with a horizontal guide rail. The electric drive slider is slidably connected to the guide rail on the horizontal plate, the lifting electric push rod is arranged at the bottom of the electric drive slider, the second electromagnetic rotating seat is arranged at the bottom of the lifting electric push rod, and the horizontal plate is arranged at the second electromagnetic rotating seat The bottom of the horizontal plate is densely covered with vacuum suction cups. The conveyor is set at the rear end of the worktable and is located on the ground directly below the vertical rack. The vacuum suction cups are all powered by an external air pump. In this way, after the cutting component is cut, the control cabinet can drive the projection of the horizontal plate on the base to completely cover the projection of the lead frame on the base through the detection data of the last detection component, and the projection of the lead frame on the base can be completely covered by the control cabinet. The lead frame cut from the base is taken out with cooperation and transferred to the conveyor, and then the conveyor will transport the lead frame to the designated collection point. The effect of effectively improving the production efficiency of the product of the present invention when cutting the lead frame is achieved.

Description of drawings

Fig. 1 is the direct view under the first angle of view of the present invention;

Fig. 2 is the exploded view under the second angle of view of the present invention;

FIG. 3 is an intuitive view of the transport assembly from a third perspective of the present invention;

FIG. 4 is an intuitive view of the cutting assembly from a fourth perspective of the present invention;

Fig. 5 is the direct view of the workbench under the fifth angle of view of the present invention;

6 is an intuitive view of some positioning components from a sixth perspective of the present invention;

7 is an intuitive view of a part of the positioning assembly from a seventh perspective of the present invention;

The symbols in the figure represent:

100-control cabinet; 101-touch screen; 102-interface area; 103-keypad area;

200-feeding assembly; 201-feeder; 202-delivery roller; 203-discharge roller;

300-cutting assembly; 301-table; 302-base; 303-film feeder; 304-leveler; 305-transverse travel unit; 306-longitudinal travel unit; 307-support arm; 308-first electromagnetic Rotary seat; 309-stamping device; 310-cutting knife;

3031-drive base; 3032-film feeding roller; 3033-gear; 3034-film feeding motor;

3041-rotating seat; 3042-leveling roller;

3051-transverse track plate; 3052-transverse slider; 3053-transverse screw; 3054-transverse motor;

3061-longitudinal track plate; 3062-longitudinal slider; 3063-longitudinal screw; 3064-longitudinal motor;

3091-pressure balance hole;

400-Transfer component; 401-Longitudinal frame; 402-Longitudinal electric push rod; 403-Cross plate; 404- Electric drive slider; 405- Lift electric push rod; 406-Second electromagnetic rotating seat; 408-vacuum suction cup; 409-conveyor;

500-limit component; 501-longitudinal limit seat; 502-limit electric rod; 503-longitudinal lower pressure plate; 504-transverse stretching unit;

5041-corner table; 5042-corner block; 5043-guide rod; 5044-second screw; 5045-stretching motor;

600-positioning assembly; 601-first track plate; 602-first sliding block; 603-first screw; 604-first motor; 605- boom; 606-detection board; 607-positioning sensor; 608-camera model Group; 609 - photoelectric sensor; 610 - pressure sensor;

700 - Recycling component; 701 - Recycling machine; 702 - Recycling roller.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, however, the present invention may also be implemented in other ways than those described herein, and therefore, the present invention is not limited to the specific embodiments disclosed in the following description. limit.

A shearing device for lead frame production in this embodiment, referring to FIGS. 1-7: includes a feeding assembly 200, a shearing assembly 300, a transfer assembly 400, a positioning assembly 600, a limiting assembly 500 and a recovery assembly 700; and the feeding assembly 200 , the cutting assembly 300 , the transfer assembly 400 , the recovery assembly 700 , the positioning assembly 600 and the limiting assembly 500 are all controlled by the control cabinet 100 .

(one)

The front end of the control cabinet 100 is provided with a touch screen 101 , an interface area 102 and a key area 103 , so that the user can use the control cabinet 100 and the control cabinet 100 to set a specified working mode by touching the display screen 101 and the key area 103 , so as to allow the control cabinet 100 to automatically control the feeding component 200 , the shearing component 300 , the transfer component 400 , the positioning component 600 , the limiting component 500 and the recovery component 700 to work; wherein, the user can use the interface area 102 to communicate with the control The cabinet 100 performs data exchange or program writing, so that the working mode of the control cabinet 100 can be customized according to actual needs.

(two)

The feeding assembly 200 includes a feeding machine 201, a delivery roll 202 and a feeding roll 203. The feeding machine 201 is set on the ground, and the feeding roll 202 and the feeding roll are both set at the front end of the feeding machine 201. The base tape with the lead frame etched, and the protective paper attached to the base tape wound on the unwinding roller 203 is torn and wound on the delivery roller 202 .

It is worth noting that the feeding roller 203 and the delivery roller 202 are both detachably mounted on the feeder 201 and driven to rotate by it.

(three)

The shearing assembly 300 includes a worktable 301, a base 302, a film feeder 303, a leveler 304, a lateral travel unit 305, a longitudinal travel unit 306, a support arm 307, a first electromagnetic rotating seat 308, a punching device 309 and a cutting knife 310, the worktable 301 is arranged on the bottom surface of the left end of the feeder 201 in the transverse direction, the base 302 is fixed on the tabletop in the middle of the worktable 301, the top of the worktable 301 and the tabletops at the left and right ends of the base 302 are provided with There is a film feeder 303, a leveler 304 is provided on the top of the right end side wall of the worktable 301, a transverse travel unit 305 is arranged on the ground at the rear end of the worktable 301, and a longitudinal travel unit 306 is arranged on the transverse travel unit 305. The unit 305 drives and displaces, the support arm 307 is arranged on the longitudinal travel unit 306 and is driven and displaced by the longitudinal travel unit 306. The bottom of the top end of the support arm 307 close to one end of the table 301 is provided with a first electromagnetic rotating seat 308, and the punching device 309 is set on the first electromagnetic rotating seat 308. The bottom of an electromagnetic rotating base 308 and the cutting knife 310 are arranged on the bottom of the punching device 309 .

It is worth noting that the plane size of the base 302 is larger than the size of the lead frame on the base tape, and the size of the edge of the cutting knife 310 is also smaller than the plane size of the base 302, so as to ensure that the cutting knife 310 will not damage the lead frame when cutting The table top of the work table 301 also protects the cutting edge of the cutting knife 310 from being damaged.

It is worth noting that the cutting blade 310 is detachably installed on the punching device 309, so that the user can replace the corresponding type of cutting blade 310 according to different types of lead frames, which can improve the scope of application of the present invention.

It is worth noting that the rotation axis of the first electromagnetic rotating base 308 is vertical to the ground.

It is worth noting that the punching device 309 adopts any one of the pneumatic driving mode or the hydraulic driving mode. In this embodiment, the punching device 309 adopts the hydraulic power driving mode, because the hydraulic driving has the advantages of large power-to-weight ratio, startup and control It has the advantages of rapid movement, stepless speed regulation, wide speed regulation range, good linear motion stability, easy to achieve overload protection, work safety and stable work.

It is worth noting that the punching device 309 is also provided with a pressure balance hole 3091 in the area surrounded by the cutting blade 310, so that when the punching device 309 drives the cutting blade 310 to cut the lead frame and resets the lead frame, the cutting blade 310 and the punching device 309 Negative pressure will not be generated in the enclosed space, so that the punching device 309 will suck up the lead frame when retracting upward, thereby causing the position of the lead frame to change relative to the base 302 , which is not conducive to the operation of the transfer assembly 400 .

(three one)

The film feeder 303 includes a driving seat 3031, a film feeding roller 3032, a gear 3033 and a film feeding motor 3034. The driving seat 3031 is arranged on the worktable 301, and two film feedings in a symmetrical relationship of upper and lower are connected to the driving seat 3031 in rotation. The ends of the roller 3032 and the sheet feeding roller 3032 protruding from the driving base 3031 are all coaxially fixed with a gear 3033. The two gears 3033 on the same driving base 3031 are meshed and any one of the gears 3033 is connected to the motor shaft of the sheet feeding motor 3034. Coaxial connection.

It is worth noting that: the base tape on the unwinding roller 203 passes through the leveler 304 and the two sheet feeders 303 in sequence and hangs above the base 302, so as to avoid friction between the lower end surface of the base tape and the base 302, As a result, the lower end face of the lead frame is damaged due to mechanical wear.

(three two)

The leveler 304 includes a rotating base 3041 installed on the worktable 301 and a leveling roller 3042 rotatably connected to the rotating base 3041, so that the base tape output by the unloading roller 203 can be leveled and conveyed sequentially through the leveling roller 3042. to the film feeder 303 , the base 302 and the film feeder 303 ; at the same time, the flattener 304 can also ensure that the base tape will not be damaged due to mechanical friction between the base tape and the edge of the table 301 .

(Thirty-three)

The transverse travel unit 305 includes a transverse rail plate 3051, a transverse slider 3061, a transverse screw 3053 and a transverse motor 3054. The number of transverse rail plates 3051 is two and arranged in parallel, and transverse sliders are slidably connected to the transverse rail plates 3051. 3061, the transverse slider 3061 drives its displacement under the cooperation of the transverse screw 3053 and the transverse motor 3054.

(three-four)

The longitudinal travel unit 306 includes a longitudinal rail plate 3061, a longitudinal slider 3062, a longitudinal screw 3063 and a longitudinal motor 3064. The top of the transverse slider 3061 is fixed on the bottom of the longitudinal rail plate 3061, and the longitudinal slider 3062 is slid on the longitudinal rail plate 3061. , the longitudinal sliding block 3062 drives its displacement under the cooperation of the longitudinal screw 3063 and the longitudinal motor 3064 , and the support arm 307 is fixed on the longitudinal sliding block 3062 .

(Four)

The transfer assembly 400 includes a longitudinal carriage 401 , a longitudinal electric push rod 402 , a horizontal plate 403 , an electric drive slider 404 , a lift electric push rod 405 , a second electromagnetic rotating seat 406 , a horizontal plate 407 , a vacuum suction cup 408 and a conveyor 409 , the longitudinal carriage 401 is installed on the ground at the rear end of the workbench 301, the transverse plate 403 is slidably connected to the longitudinal carriage 401 and is driven and displaced by the longitudinal electric push rod 402 arranged on the longitudinal carriage 401, and the transverse plate 403 is provided with The horizontal guide rail, the electric drive slider 404 is slidably connected to the guide rail on the horizontal plate 403 , the lift electric push rod 405 is arranged at the bottom of the electric drive slider 404 , and the second electromagnetic rotating seat 406 is arranged at the bottom of the lift electric push rod 405 , the horizontal plate 407 is arranged at the bottom of the second electromagnetic rotating base 406 , the plate surface of the bottom of the horizontal plate 407 is densely covered with vacuum suction cups 408 , and the conveyor 409 is arranged at the rear end of the workbench 301 and is on the ground directly below the vertical rack 401 .

It is worth noting that the vacuum suction cups 408 are powered by an external air pump, so that the control cabinet 100 can generate a specified negative pressure on the vacuum suction cups 408 by controlling the air pump, thereby attracting the lead frame on the base 302. At the same time, the air pump is controlled to generate a specified positive pressure on the vacuum suction cup 408 , so that the lead frame under the horizontal plate 407 is safely released to the conveyor 409 .

It is worth noting that the rotation axis of the second electromagnetic rotation is perpendicular to the ground.

(five)

The positioning assembly 600 includes a first track plate 601 , a first slider 602 , a first screw 603 , a first motor 604 , a boom 605 , a detection board 606 , a positioning sensor 607 , a camera module 608 , a photoelectric sensor 609 and a pressure sensor 610 , the installation stroke direction of the first track plate 601 is longitudinally arranged on the ground at the front end of the workbench 301, the first slider 602 is slidably connected to the first track plate 601, and the first slider 602 is connected between the first screw 603 and the first A motor 604 cooperates to drive its displacement, the boom 605 is arranged on the first slider 602, the detection board 606 is horizontally installed on the lower end of the boom 605 close to one end of the workbench 301, the positioning sensor 607 and the camera module 608 are both The photoelectric sensor 609 is arranged on the bottom surface between the discharge roller 203 and the leveling roller 3042, and the pressure sensor 610 is arranged in the middle of the upper end surface of the base 302.

Among them, the photoelectric sensor 609 is used to detect how long the base tape is released by the discharge roller 203, so that the control cabinet 100 can judge how long the base tape at the base 302 has moved through the monitoring data of the photoelectric sensor 609, so as to determine the distance above the base 302. whether there is a complete lead frame on the baseband.

The pressure sensor 610 is used to cooperate with the limit assembly 500. The control cabinet 100 controls the limit assembly 500 to press the base tape at the base 302 to the upper end surface of the base 302 flatly and horizontally. Once the pressure sensor 610 detects a signal And when the signal reaches the specified value, the control cabinet 100 can determine that the baseband is flat and horizontally pressed down on the upper end surface of the base 302 .

The positioning sensor 607 is used to detect the position of the lead frame on the base 302, and then the control cabinet 100 captures the state of the lead frame on the base 302 through the camera module 608, and then the control cabinet 100 calculates according to the built-in machine vision program The deflection amplitude of the lead frame relative to the base 302 on the horizontal plane, and the specific position of the end face of the lead frame on the base 302 is determined.

(six)

The limit assembly 500 includes a longitudinal limit seat 501, a limit electric rod 502, a longitudinal lower pressure plate 503 and a transverse stretching unit 504. The number of the longitudinal limit seats 501 is two, and each longitudinal limit seat 501 is arranged on the base. Between the seat 302 and the corresponding film feeder 303, both ends of the longitudinal limit seat 501 are provided with vertical limit electric push rods, and the top ends of the two limit electric push rods on the same longitudinal limit seat 501 are respectively fixed on At both ends of the same longitudinal pressing plate 503, the transverse stretching unit 504 includes a corner platform 5041, a corner block 5042, a guide rod 5043, a second screw 5044 and a stretching motor 5045, and both ends of the longitudinal limit block are provided with corner blocks 5042 , the two corner blocks 5042 at the rear end of the worktable 301 are slidably connected to the same guide rod 5043, the two corner blocks 5042 at the front end of the worktable 301 are screwed on the same second screw rod 5044, and the ends of the guide rod 5043 and the second screw rod 5044 The second screw 5044 is driven to rotate by the stretching motor 5045, the central axes of the guide rod 5043 and the second screw 5044 are both in the transverse direction, the stretching motor 5045 and the second screw The screw 5044 cooperates to drive the two longitudinal limit seats 501 to perform symmetrical and synchronous reverse movement with respect to the base 302 .

It is worth noting that the upper plane of the longitudinal limit seat 501 is equal to the plane of the upper end of the base 302 , and the base tape between the two film feeders 303 also passes through the space between the longitudinal limit seat 501 and the longitudinal lower platen 503 .

In this way, the control cabinet 100 can drive the vertical lowering plate 503 through the limit electric push rod to move the base 302 downward, so as to cooperate with the vertical limit seat 501 to fix the basebands at the left and right ends, and then instruct the stretching motor 5045 to drive the second The screw 5044 rotates to make the two longitudinal limit seats 501 move slowly in opposite directions, thereby straightening the base tape at the base 302 .

(seven)

The left end of the worktable 301 is also provided with a recycling assembly 700 controlled by the control cabinet 100 . The recycling assembly 700 includes a recycling machine 701 set on the ground and a recycling roller 702 set at the front end of the recycling machine 701 . The film feeder 303 on the left end of the worktable 301 outputs the output The base tape is wound on the recovery roll 702 .

In this way, the control cabinet 100 can collect the discarded basebands in a centralized manner through the recycling assembly 700, which is beneficial to saving costs.

(Eight)

The process flow when the present invention works specifically is:

In the first step, the user first pulls out the base tape from the unwinding roller 203 and passes through the leveler 304, the film feeder 303, the limiter assembly 500, the base 302, the limiter assembly 500 and the film feeder 303 in sequence and finally It is wound on the recovery roller 702 and the protective paper on the base tape is wound on the delivery roller 202 at the same time.

In the second step, the user sets a specified working mode for the control cabinet 100

In the third step, the control cabinet 100 instructs the recovery roller 702, the sheet feeder 303, the unwinding roller 203 and the delivery roller 202 to start up, thereby making the base belt move.

In the fourth step, the control cabinet 100 detects the length of the base tape being discharged through the photoelectric sensor 609. Once the moving length of the base tape reaches the specified value (at this time, there is a complete lead frame on the base tape directly above the base 302), the control cabinet 100 immediately instructs the recovery roller 702, the sheet feeder 303, the discharge roller 203 and the take-up roller 202 to close.

In the fifth step, the control cabinet 100 instructs the limit electric push rod to retract, so that the basebands at both ends of the base 302 are clamped, and then instructs the stretching motor 5045 to start to drive the two limit assemblies 500 to perform synchronous reversal (the two are opposite to each other). The base tape at the base 302 is pulled straight, and at this time, the upper end surface of the base 302 is completely abutted with the base tape.

In the sixth step, the control cabinet 100 instructs the first motor 604 to start to move the detection board 606 to just above the base 302, and then the control cabinet 100 calculates the position of the lead frame relative to the base 302 through the positioning sensor 607 and the camera module 608. The amplitude of the deflection on the horizontal plane is determined, and the specific position of the lead frame on the upper end face of the base 302 is determined; then the control cabinet 100 instructs the first motor 604 to start to move the detection board 606 to the outside of the workbench 301 .

In the seventh step, the control cabinet 100 instructs the horizontal motor 3054, the vertical motor 3064 and the first electromagnetic rotating base 308 according to the detection data in the sixth step, so that the projection of the cutting edge of the cutting knife 310 on the base 302 is related to the lead frame. The projection of the edge on the base 302 is completely coincident, and then the control cabinet 100 instructs the punching device 309 to drive the cutting knife 310 to move downward, thereby cutting the lead frame from the base tape, and then the control cabinet 100 instructs the transverse motor 3054, the longitudinal motor 3064 and the The first electromagnetic rotating base 308 is reset (at this time, the punching device 309 meets the outer end of the worktable 301).

In the eighth step, the control cabinet 100 instructs the longitudinal electric push rod 402, the electric drive block and the second electromagnetic rotating seat 406 to start according to the detection data in the sixth step, so that the projection of the horizontal plate 407 on the base 302 completely covers the lead frame. Projection on the base 302, and the lead frame cut from the base 302 is taken out through the cooperation of the lifting telescopic rod and the vacuum suction cup 408, and transported to the conveyor 409, and then the conveyor 409 transports the lead frame to the designated collection point.

In the ninth step, the control cabinet 100 instructs the first motor 604 to start up, so that the two limiting assemblies 500 move in a synchronous and reverse direction (they move toward each other), thereby releasing the base tape at the base 302 to a natural slack.

In the tenth step, the control cabinet 100 instructs the limit electric push rod to extend, so that the basebands at both ends of the base 302 are completely released.

In the eleventh step, repeat the above third steps to tenth steps in turn.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. The embodiments are applied to other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solutions of the present invention without departing from the content of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a shearing mechanism is used in lead frame production which characterized in that: comprises a feeding component, a shearing component and a transferring component which are arranged in sequence;

the shearing assembly is also provided with a positioning assembly for collecting the space position of the lead frame and a limiting assembly for fixing the space position of the lead frame;

the feeding assembly, the shearing assembly, the transferring assembly, the positioning assembly and the limiting assembly are controlled by a control cabinet.

2. The shearing device for lead frame production according to claim 1, wherein the feeding assembly comprises a feeding machine, a receiving roller and a discharging roller, the feeding machine is arranged on the ground, the receiving roller and the feeding roller are both arranged at the front end of the feeding machine, a base belt etched with lead frames is wound on the discharging roller, and protective paper attached to the base belt wound on the discharging roller is torn and then wound on the receiving roller;

the shearing assembly comprises a workbench, a base, a sheet feeder, a leveler, a transverse stroke unit, a longitudinal stroke unit, a supporting arm, a first electromagnetic rotary seat, a stamping device and a cutting knife, the workbench is arranged on the bottom surface of the transverse left end of the feeder, the base is fixed on the table surface in the middle of the workbench, the sheet feeders are arranged on the table surfaces at the top of the workbench and at the left and right ends of the base, the leveler is arranged on the top of the side wall at the right end of the workbench, the transverse stroke unit is arranged on the ground at the rear end of the workbench, the longitudinal stroke unit is arranged on the transverse stroke unit and is driven to displace by the transverse stroke unit, the supporting arm is arranged on the longitudinal stroke unit and is driven to displace by the longitudinal stroke unit, the first electromagnetic rotary seat is arranged at the bottom of the supporting arm close to one end of the workbench, the stamping device is arranged at the bottom of the first electromagnetic rotary seat, the cutting knife is arranged at the bottom of the stamping device;

the transfer assembly is including setting up vertical bank, vertical electric putter, diaphragm, electric drive slider, lift electric putter, second electromagnetism roating seat, horizontal plate, vacuum chuck and conveyer, vertical bank is installed subaerial at the workstation rear end, the diaphragm slips on vertical bank and by the vertical electric putter drive displacement of setting on vertical bank, be equipped with horizontal guide rail on the diaphragm, electric drive slider slips on the guide rail on the diaphragm, lift electric putter sets up the bottom at the electric drive slider, second electromagnetism roating seat sets up the bottom at lift electric putter, the horizontal plate sets up the bottom at second electromagnetism roating seat, the face of horizontal plate bottom has the vacuum chuck of gathering, the conveyer sets up the rear end of workstation and is in subaerial under vertical bank.

3. The shearing device for lead frame production as recited in claim 2, wherein the base strip on the feeding roller sequentially passes through the flattener and the two sheet feeders and is suspended right above the base.

4. The shearing device for lead frame production as recited in claim 2, wherein said leveler comprises a rotating base installed on the work table and a leveling roller rotatably connected to the rotating base;

the sheet feeder comprises a driving seat, sheet feeding rollers, gears and a sheet feeding motor, wherein the driving seat is arranged on a workbench, the driving seat is rotatably connected with the two sheet feeding rollers which are in up-down symmetrical relation, the end parts of the sheet feeding rollers extending out of the driving seat are coaxially fixed with the gears, the two gears on the same driving seat are meshed, and any one of the gears is coaxially connected with a motor shaft of the sheet feeding motor;

the transverse stroke unit comprises transverse track plates, transverse sliding blocks, transverse screws and transverse motors, wherein at least two transverse track plates are arranged in parallel, the transverse track plates are connected with the transverse sliding blocks in a sliding mode, and the transverse sliding blocks drive the transverse sliding blocks to move under the matching of the transverse screws and the transverse motors;

the longitudinal stroke unit comprises a longitudinal track plate, a longitudinal sliding block, a longitudinal screw and a longitudinal motor, the top ends of the transverse sliding blocks are fixed at the bottom of the longitudinal track plate, the longitudinal sliding block is connected to the longitudinal track plate in a sliding mode, the longitudinal sliding block drives the longitudinal sliding block to move under the matching of the longitudinal screw and the longitudinal motor, and the supporting arm is fixed on the longitudinal sliding block.

5. The shearing device for lead frame production as recited in claim 2, wherein the size of said base is larger than the size of the lead frame on the base tape.

6. The shearing device for lead frame production according to claim 1, wherein the first electromagnetic rotating seat and the second electromagnetic rotating shaft are vertical to the ground, the stamping device adopts any one of a pneumatic driving mode or a hydraulic driving mode, and a pressure balance hole is further formed in the area, surrounded by the cutting knife, of the stamping device.

7. The shearing device for lead frame production as recited in claim 2, wherein each of said vacuum chucks is powered by an external air pump.

8. The shearing device for lead frame production according to claim 1, the positioning component comprises a first track plate, a first slide block, a first screw rod, a first motor, a suspension arm, a detection plate, a positioning sensor, a camera module, a photoelectric sensor and a pressure sensor, the first track plate is longitudinally arranged on the ground at the front end of the workbench along the installation stroke direction, the first sliding block is connected on the first track plate in a sliding way, the first sliding block drives the first sliding block to move under the matching of the first screw rod and the first motor, the suspension arm is arranged on the first slide block, the detection plate is horizontally arranged at the lower end of one end of the suspension arm close to the workbench, the positioning sensor and the camera module are arranged on the plate surface at the lower end of the detection plate, the photoelectric sensor is arranged on the bottom surface between the discharging roller and the leveling roller, and the pressure sensor is arranged in the middle of the upper end surface of the base.

9. The shearing device for lead frame production according to claim 1, wherein the limiting assembly comprises two longitudinal limiting seats, two limiting electric rods, two longitudinal pressing plates and a transverse stretching unit, each longitudinal limiting seat is arranged between the base and the corresponding sheet feeder, two ends of each longitudinal limiting seat are respectively provided with a vertical limiting electric push rod, the top ends of the two limiting electric push rods on the same longitudinal limiting seat are respectively fixed at two ends of the same longitudinal pressing plate, the transverse stretching unit comprises a corner block, a guide rod, a second screw rod and a stretching motor, two ends of each longitudinal limiting block are respectively provided with a corner block, the two corner blocks at the rear end of the worktable are in sliding connection on the same guide rod, the two corner blocks at the front end of the worktable are in threaded connection on the same second screw rod, the guide rod and the end of the second screw rod are both rotatably connected on the corresponding corner blocks on the worktable, the second screw rod is driven to rotate by a stretching motor, the guide rod and the central axis of the second screw rod are transverse, and the stretching motor and the second screw rod are matched to drive the two longitudinal limiting seats to synchronously and reversely move symmetrically relative to the base.

10. The shearing device for lead frame production according to claim 1, wherein a touch display screen, an interface area and a key area are arranged at the front end of the control cabinet;

the plane of the upper end of the longitudinal limiting seat is not higher than the plane of the upper end of the base, and a base band between the two film feeders also penetrates through a space between the longitudinal limiting seat and the longitudinal lower pressing plate;

the workstation left end still is equipped with the recovery subassembly that receives the control of switch board, retrieve the subassembly including setting up at subaerial recovery machine and setting up the recovery roller at recovery machine front end, the piece ware output baseband winding that send of workstation left end is on retrieving the roller.

Images