A lead frame processing conveying and collecting equipment

Abstract

The present application relates to a kind of lead frame processing conveying and receiving equipment, belong to lead frame receiving equipment technical field.It includes mounting frame, the side of the mounting frame is provided with transport device, the mounting frame is rotatably connected with four rotating rods, the rotating rod is fixedly connected with several chain wheels distributed at equal intervals, and the chain wheel of upper and lower correspondence is commonly provided with chain plate, the chain plate is hinged with several placing pieces distributed at equal intervals, torsional spring is arranged between the placing piece and the chain plate, the mounting frame is slidably connected with collection frame, the mounting frame is provided with base, the collection frame is provided with top seat, and elastic element is arranged between the top seat and the base.The lead frame is sequentially stacked by placing piece, the inclination of lead frame in the process of falling caused by air flow and other factors is reduced, so that the lead frame is more neat when stacking, and the probability of damage caused by lead frame stacking disorder is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to lead frame material collecting equipment technical field, especially to a kind of lead frame processing conveying material collecting equipment. BACKGROUND

[0002] Lead frame is a kind of most basic, most key component in semiconductor packaging, it is usually a thin, by special alloy made metal strip, through precision processing, its core role is to provide a stable support, heat dissipation channel for chip, and provide electrical connection path between the microcircuit inside chip and external circuit board, lead frame needs to be transported and stacked in the production process, such as stamping, cutting process, so that lead frame enters different processing processes.

[0003] The existing material collecting device in the working process, generally by transporting lead frame to the collecting box above, then makes lead frame free fall, falls into collecting box, through this way, when lead frame is stacked, because the quality of lead frame is very light, so it is easily affected by airflow in the process of free fall, so that lead frame cannot be accurately stacked together, when the surface of lead frame is not flat, multiple lead frames press the protruding part of lower lead frame, the protruding part of lead frame will be deformed, and then lead frame is damaged. SUMMARY

[0004] In order to overcome the shortcomings mentioned in the above background art, the present application provides a kind of lead frame processing conveying material collecting equipment.

[0005] The technical implementation scheme of the present application is: a kind of lead frame processing conveying material collecting equipment, including mounting frame, the side of the mounting frame is provided with transport device, the mounting frame is rotatably connected with four rotating rods, the rotating rod is fixedly connected with a plurality of chain wheels distributed at equal intervals, and the upper and lower corresponding two chain wheels are commonly provided with chain plates, the chain plate is hingedly connected with a plurality of placing pieces distributed at equal intervals, a torsional spring is arranged between the placing piece and the chain plate, the mounting frame is rotatably connected with transmission rod, the transmission rod and the adjacent two rotating rods are driven by bevel gear set, the mounting frame is fixedly connected with motor, the output shaft of the motor and the transmission rod are driven by gear set, the mounting frame is slidably connected with collecting frame, the mounting frame is provided with base, the collecting frame is provided with top seat, and the top seat and the base are provided with elastic element.

[0006] As an improvement of the above scheme, the mass of lead frame is m, the thickness of lead frame is d, the gravitational acceleration is g, and the elastic coefficient of the elastic element is k=mg / d.

[0007] As an improvement of the above-mentioned scheme, the placing piece is rotatably connected with a first roller, and the first roller is in mutual extrusion with the mounting frame.

[0008] As an improvement of the above-mentioned scheme, the placing piece is rotatably connected with a second roller, and the second roller is used for reducing the friction of the placing piece to the lead frame.

[0009] As an improvement of the above-mentioned scheme, the diameter of the second roller is smaller than that of the first roller.

[0010] As an improvement of the above-mentioned scheme, the placing piece is provided with an extrusion part, the extrusion part is in mutual extrusion with the adjacent chain plate, and the extrusion part is used for limiting the rotation of the placing piece.

[0011] As an improvement of the above-mentioned scheme, the mounting frame is fixedly connected with two electric push rods which are mirror-distributed, the telescopic end of the electric push rod is fixedly connected with a mounting rod, the mounting rod is fixedly connected with two magnets, the two magnets on the same mounting rod are respectively used for connecting the base and the top seat, the base is provided with two first clamping grooves, the top seat is provided with two second clamping grooves, the mounting frame is fixedly connected with an infrared sensor, the mounting frame is provided with a sliding rail, the sliding rail of the mounting frame is detachably installed with the base, the collecting frame is detachably installed with the top seat, and the top seat is provided with a sliding groove.

[0012] As an improvement of the above-mentioned scheme, the width of the two sides of the sliding groove is gradually widened, so as to improve the fault tolerance rate of the connection between the collecting frame and the top seat.

[0013] As an improvement of the above-mentioned scheme, the collecting frame is limitingly and slidingly connected with a positioning column, a spring is arranged between the positioning column and the collecting frame, the top seat is provided with a positioning groove, the positioning column is inserted into the positioning groove to position the top seat, and the middle part of the sliding rail of the mounting frame is provided with a friction material, so as to increase the friction between the base.

[0014] As an improvement of the above-mentioned scheme, the collecting frame is rotatably connected with rotation rollers which are equally spaced.

[0015] The above-mentioned scheme has the beneficial effects that the lead frame is stacked by the placing piece, so that the inclination of the lead frame caused by factors such as air flow during falling is reduced, so that the lead frame is more neat during stacking, and the probability of damage caused by the unneat stacking of the lead frame is reduced.

[0016] The first roller and the second roller are arranged on the placing piece, so that the first roller and the second roller are rotated when the lead frame moves relative to the placing piece, thereby reducing the abrasion of the lead frame during movement, and further protecting the integrity of the lead frame.

[0017] The elastic member with reduced elasticity coefficient caused by long time use is automatically replaced to prevent the lead frame from falling too long, thereby ensuring the accuracy of the lead frame stacking and reducing the deviation of the lead frame stacking. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the present application;

[0019] Figure 2 It is a perspective view of the transmission rod and the motor of the present application;

[0020] Figure 3 It is a perspective view of the sprocket and the chain plate of the present application;

[0021] Figure 4 It is a perspective view of the placing member and the torsion spring of the present application;

[0022] Figure 5 It is a perspective view of the collecting frame and the top seat of the present application;

[0023] Figure 6 It is a perspective view of the top seat of the present application.

[0024] Figure label name: 1 - mounting frame, 101 - transport device, 2 - rotating rod, 3 - sprocket, 4 - chain plate, 5 - placing member, 501 - extrusion part, 6 - torsion spring, 7 - transmission rod, 8 - motor, 9 - collecting frame, 901 - rotating roller, 10 - base, 1001 - first clamping groove, 11 - top seat, 1101 - sliding groove, 1102 - second clamping groove, 1103 - positioning groove, 12 - elastic member, 13 - first roller, 14 - second roller, 15 - electric push rod, 16 - mounting rod, 17 - magnet, 18 - infrared sensor, 19 - positioning column, 20 - spring. DETAILED DESCRIPTION

[0025] The present application is described in detail below in combination with the drawings and specific examples, but is not limited to the present application.

[0026] Example 1

[0027] A lead frame processing conveying and collecting equipment, such as Figures 1-6As shown, it comprises a mounting frame 1, the left side of the mounting frame 1 is provided with a conveying device 101, the mounting frame 1 is rotatably connected with four rotating rods 2, the upper and lower two rotating rods 2 are a corresponding group, the rotating rod 2 is fixedly connected with three chain wheels 3 distributed at equal intervals, the upper and lower corresponding two chain wheels 3 are commonly provided with a chain plate 4, the chain plate 4 is hingedly connected with four placing pieces 5 distributed at equal intervals, the placing piece 5 is composed of a T-shaped frame and a rotating block, a torsional spring 6 is arranged between the placing piece 5 and the chain plate 4, the mounting frame 1 is rotatably connected with a transmission rod 7, the lower two rotating rods 2 are driven by bevel gear sets and the transmission rod 7, the mounting frame 1 is fixedly connected with a motor 8, the output shaft of the motor 8 is driven by a gear set and the transmission rod 7, the output shaft of the motor 8 drives the transmission rod 7 through the gear set, the transmission rod 7 drives the lower two rotating rods 2 to rotate through the front and rear two groups of bevel gears, the mounting frame 1 is slidably connected with a collecting frame 9, the collecting frame 9 is used for placing the stacked lead frame, the mounting frame 1 is provided with a base 10, the lower side of the collecting frame 9 is provided with a top seat 11, the top seat 11 and the base 10 are provided with an elastic piece 12. The mass of the lead frame is m, the thickness of the lead frame is d, the gravitational acceleration is g, the elastic coefficient k of the elastic piece 12 is mg / d, so that when the lead frame is stacked on the collecting frame 9, the collecting frame 9 will move downward by a distance equivalent to the thickness of the lead frame, so that the upper side of the uppermost lead frame stacked on the collecting frame 9 is flush with the upper side of the collecting frame 9 when it is empty, thereby maintaining the short distance falling of the lead frame and reducing the probability of displacement when the lead frame falls. The placing piece 5 is provided with a pressing part 501, the pressing part 501 and the adjacent chain plate 4 are extruded with each other, the pressing part 501 is used to limit the rotation of the placing piece 5, so that the placing piece 5 maintains a horizontal state during movement. The collecting frame 9 is rotatably connected with four rotating rollers 901 distributed at equal intervals, when the lead frame is full, the stacked lead frame can be pulled to the right to take out the lead frame, and under the action of the rotating roller 901, the lowermost lead frame will not be damaged due to friction with the collecting frame 9.

[0028] As shown in Figure 3 and Figure 4 , the placing piece 5 is rotatably connected with a first roller 13, after the lead frame is separated from the conveying device 101 and the lead frame moves to the first roller 13, the first roller 13 is driven to rotate, thereby avoiding the lead frame from rubbing with the placing piece 5, the first roller 13 and the mounting frame 1 are extruded with each other, when the chain plate 4 drives the placing piece 5 to move, the placing piece 5 drives the first roller 13 to contact with the mounting frame 1, so that the placing piece 5 gradually inclines, thereby unloading the lead frame on the placing piece 5.

[0029] As shown in Figure 4As shown, the placing member 5 is rotationally connected with a second roller 14, which is used to reduce the friction of the placing member 5 to the lead frame. The diameter of the second roller 14 is smaller than that of the first roller 13, and when the lead frame moves from the conveying device 101 to the first roller 13, it will not contact the second roller 14. In the initial stage of the inclination of the placing member 5, the second roller 14 will contact the lead frame and lift it up, so that the lead frame will not rub against the placing member 5 during the rotation of the placing member 5.

[0030] When the device is used to collect the lead frame, the lead frame is transported from the conveying device 101 to above the collecting rack 9, and then sequentially contacts the first roller 13 and drives the first roller 13 to rotate. After the lead frame is separated from the conveying device 101, it is stopped by the mounting rack 1. At this time, the motor 8 is started, the output shaft of the motor 8 drives the transmission rod 7 to rotate through the gear set, the transmission rod 7 drives the two rotating rods 2 on the lower side to rotate through the two sets of bevel gears, the rotating rods 2 drive the sprocket wheels 3 on them to rotate, the sprocket wheels 3 drive the chain plates 4 to rotate, the chain plates 4 drive the placing member 5 to move, and the placing member 5 drives the first roller 13 and the second roller 14 on it to move. At this time, the first roller 13 carrying the lead frame moves downward, and when the first roller 13 contacts the mounting rack 1, the first roller 13 rotates, drives the placing member 5 to rotate, and makes the torsional spring 6 store energy. At this time, the second roller 14 contacts the lead frame, thereby avoiding the abrasion caused by the direct contact between the placing member 5 and the lead frame. After the second roller 14 is separated from the lead frame, the lead frame falls on the rotating roller 901. At this time, the weight of the collecting rack 9 increases, the elastic member 12 is compressed, and the compression distance of the elastic member 12 is equal to the thickness of the lead frame. When the elastic member 12 is compressed to the limit, the lead frame loaded on the collecting rack 9 is full. At this time, the lead frame on the collecting rack 9 can be taken out. After the lead frame is taken out, the collecting rack 9 returns to the original position under the action of the elastic member 12 and starts the next stacking of the lead frame.

[0031] Embodiment 2

[0032] On the basis of embodiment 1, as Figure 1 and Figure 2 、 Figure 5 and Figure 6As shown, the mounting frame 1 is fixed with two electric push rods 15 distributed in front and back mirror image, the telescopic end of the electric push rod 15 is fixed with a mounting rod 16, the mounting rod 16 is fixed with two magnets 17, the lower magnet 17 is used to connect with the base 10, and the upper magnet 17 is used to connect with the top base 11, the base 10 and the top base 11 are both magnetic materials, the base 10 is provided with two first clamping grooves 1001 in front and back, the top base 11 is provided with two second clamping grooves 1102 in front and back, the first clamping groove 1001 and the second clamping groove 1102 are both used for positioning, so that the base 10 and the top base 11 are connected with the adjacent magnet 17 in the illustrated state, the mounting frame 1 is fixed with an infrared sensor 18, the infrared sensor 18 is used to monitor the position of the collection frame 9 when it is empty, so as to judge whether the elastic member 12 needs to be replaced, the mounting frame 1 is provided with a sliding rail, the sliding rail base 10 of the mounting frame 1 is detachably installed, the collection frame 9 is detachably installed with the top base 11, the top base 11 is provided with a sliding groove 1101, the sliding groove 1101 is used to connect the top base 11 and the collection frame 9. The front and back sides of the sliding groove 1101 gradually widen, which is used to improve the fault tolerance rate of the connection between the collection frame 9 and the top base 11, so that even if the standby top base 11 is not completely aligned with the top base 11 in use, the standby top base 11 can still be connected with the collection frame 9.

[0033] As shown, Figure 5 The middle part of the collection frame 9 is limitedly connected with a positioning column 19, the positioning column 19 is composed of a cylinder and a hemisphere, a spring 20 is arranged between the positioning column 19 and the collection frame 9, the spring 20 is always in a compressed state, which is used to provide the force required for the positioning column 19 to limit the top base 11, the limiting force of the positioning column 19 to the top base 11 is greater than the magnetic attraction force between the magnet 17 and the top base 11, the top base 11 is provided with a positioning groove 1103, the depth of the positioning groove 1103 is less than the radius of the hemisphere of the positioning column 19, the positioning column 19 is inserted into the positioning groove 1103 to position the top base 11, the middle part of the sliding rail of the mounting frame 1 is provided with a friction material, which is used to increase the friction force between the base 10, the friction force between the friction material of the middle part of the sliding rail of the mounting frame 1 and the base 10 is greater than the magnetic attraction force between the magnet 17 and the base 10.

[0034] In use of the device, the standby base 10 is installed on the mounting frame 1 and is attracted to the magnet 17 below the front side, the standby top 11 is attracted to the magnet 17 above the front side, and the elastic member 12 is installed between the two. As the elastic member 12 is used for a long time, when the elastic coefficient of the elastic member 12 decreases due to metal fatigue, the required elastic force to support the collecting frame 9 does not change, but because the elastic coefficient of the elastic member 12 decreases, a longer distance needs to be compressed by the elastic member 12 to generate the same elastic force. At this time, the collecting frame 9 will be lowered relative to the original position. When the infrared sensor 18 detects the change in position of the collecting frame 9 when it is empty, the extension end of the rear electric push rod 15 is extended, and the rear mounting rod 16 and magnet 17 are moved until the two magnets 17 on the rear side are in contact with the base 10 and the top 11. At this time, the extension end of the front electric push rod 15 is extended, and the front mounting rod 16 and magnet 17 are moved, and the two magnets 17 on the front side move the standby base 10 and top 11. When the standby base 10 and top 11 come into contact with the working base 10 and top 11, the extension end of the rear electric push rod 15 is shortened, and the extension end of the front electric push rod 15 continues to be extended, thereby pushing the standby base 10 and top 11 to replace the working base 10 and top 11, and further replacing the elastic member 12. When the top 11 moves, the top 11 presses the positioning column 19, causing the positioning column 19 to move upward and compress the spring 20. When the positioning groove 1103 of the standby top 11 is aligned with the positioning column 19, the positioning column 19 is inserted into the positioning groove 1103 of the standby top 11 under the action of the spring 20, and the extension end of the front electric push rod 15 begins to shorten. At this time, because the resistance of the positioning column 19 to the top 11 and the friction between the middle friction material of the sliding rail of the mounting frame 1 and the base are both greater than the attraction of the magnet 17, the extension end of the electric push rod 15 drives the front mounting rod 16 and magnet 17 to move forward, causing the two magnets 17 to separate from the base 10 and the top 11, respectively. The extension end of the rear electric push rod 15 continues to shorten, and the rear base 10 and top 11 are pulled out through the mounting rod 16 and magnet 17. Then, the damaged elastic member 12 between the base 10 and the top 11 can be replaced as a standby for the next replacement.

[0035] It should be understood that the above description is for illustrative purposes only and is not intended to limit the present application. Those skilled in the art will understand that variations of the present application will be included within the scope of the present application.

Claims

1. A lead frame processing conveying and collecting equipment, comprising a mounting frame (1), one side of the mounting frame (1) is provided with a conveying device (101), characterized in that: The mounting frame (1) is rotationally connected with four rotating rods (2), the rotating rods (2) are fixedly connected with a plurality of chain wheels (3) distributed at equal intervals, and the chain wheels (3) corresponding to the upper and lower are commonly provided with a chain plate (4), the chain plate (4) is hingedly connected with a plurality of placing pieces (5) distributed at equal intervals, a torsional spring (6) is arranged between the placing piece (5) and the chain plate (4), the mounting frame (1) is rotationally connected with a transmission rod (7), the transmission rod (7) and the adjacent two rotating rods (2) are driven by bevel gear sets, the mounting frame (1) is fixedly connected with a motor (8), the output shaft of the motor (8) and the transmission rod (7) are driven by gear sets, and the mounting frame (1) is slidingly connected with a collecting frame (9); the mounting frame (1) is provided with a base (10), the collecting frame (9) is provided with a top base (11), and an elastic piece (12) is arranged between the top base (11) and the base (10); The placing piece (5) is rotationally connected with a first roller (13), and the first roller (13) is pressed against the mounting frame (1); The placing piece (5) is rotationally connected with a second roller (14), and the second roller (14) is used for reducing the friction of the placing piece (5) on the lead frame; The diameter of the second roller (14) is smaller than that of the first roller (13); The mounting frame (1) is fixedly connected with two electric push rods (15) distributed in mirror image, the telescopic end of the electric push rod (15) is fixedly connected with a mounting rod (16), the mounting rod (16) is fixedly connected with two magnets (17), and the two magnets (17) on the same mounting rod (16) are respectively used for connecting the base (10) and the top base (11); the base (10) is provided with two first clamping grooves (1001), the top base (11) is provided with two second clamping grooves (1102), the mounting frame (1) is fixedly connected with an infrared sensor (18), the mounting frame (1) is provided with a sliding rail, the sliding rail of the mounting frame (1) is detachably installed with the base (10), the collecting frame (9) is detachably installed with the top base (11), and the top base (11) is provided with a sliding groove (1101).

2. The lead frame processing conveying and collecting apparatus according to claim 1, characterized by: The mass of the lead frame is m, the thickness of the lead frame is d, the gravitational acceleration is g, and the elastic coefficient of the elastic piece (12) is k=mg / d.

3. The lead frame processing conveying and collecting apparatus according to claim 1, wherein: The placing piece (5) is provided with a pressing portion (501), the pressing portion (501) is pressed against the adjacent chain plate (4), and the pressing portion (501) is used for limiting the rotation of the placing piece (5).

4. The lead frame processing conveying and collecting apparatus according to claim 1, wherein: The widths of the two sides of the sliding groove (1101) gradually widen, so that the fault tolerance of the connection between the collecting frame (9) and the top base (11) is improved.

5. The lead frame processing conveying and collecting apparatus according to claim 4, wherein: The collecting frame (9) is limitedly and slidably connected with a positioning column (19), a spring (20) is arranged between the positioning column (19) and the collecting frame (9), the top base (11) is provided with a positioning groove (1103), the positioning column (19) is inserted into the positioning groove (1103) to position the top base (11), and the middle part of the slide rail of the mounting frame (1) is provided with a friction material for increasing the friction between the bottom base (10).

6. The lead frame processing conveying and collecting apparatus according to claim 5, wherein: The collecting frame (9) is rotationally connected with rotation rollers (901) which are distributed at equal intervals.

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