CN210754460U - Stable form lead frame flattening device - Google Patents

Abstract

The utility model provides a stable lead frame flattening device, which comprises a base, wherein a material bearing platform is arranged on the base, at least one lifting mechanism is arranged on each of two sides of the material bearing platform, a lifting support is fixed at the output end of the lifting mechanism, the lifting support is in sliding connection with the base through a lifting guide rail, a material pressing plate is fixed at the top of the lifting support, the material pressing plate is positioned right above the material bearing platform, a driving motor is arranged on one side of the lifting support, the output end of the driving motor is connected with a rotating shaft, two belt driving mechanisms are connected on the rotating shaft, and the two belt driving mechanisms are respectively positioned on two sides of the material bearing platform; the belt driving mechanism comprises a driving wheel and a first driven wheel, and a feeding belt is wound between the driving wheel and the driven wheel. The utility model discloses can ensure that each partial structure of lead frame all obtains reliable processing of flattening, and before the contact pressure flitch that flattens, the lead frame can not take place the motion, can avoid flattening in-process lead frame and take place the skew.

Description

A stable lead frame flattening device

technical field

The utility model relates to a flattening device, in particular discloses a stable lead frame flattening device.

Background technique

The lead frame is a key structural component that realizes the electrical connection between the terminal of the internal circuit of the chip and the outer lead. It acts as a bridge to connect with the external wire. Most of the semiconductor integrated blocks need to use the lead frame, and the chip of the general electronic device All are set on the lead frame.

With the development of science and technology, the advancement of electronics tends to be miniaturized design, and the lead frame is also designed into a thin sheet structure. It is inevitable that deformation such as bending will occur during transportation. Before soldering the chip, the lead frame generally needs to be flattened. In the prior art, the lead frame does not necessarily face the pressing plate after being fed into the device, which easily leads to partial structure of the lead frame not being flattened, and during the flattening process, the lead frame is prone to shift, which affects the machining accuracy.

Utility model content

Based on this, it is necessary to provide a stable lead frame flattening device in view of the problems of the prior art, which can ensure that all parts of the lead frame can be reliably flattened, and can avoid the lead frame from being offset during the flattening process.

In order to solve the problems of the prior art, the utility model discloses a stable lead frame flattening device, which comprises a base, a material bearing platform is arranged on the base, at least one lifting mechanism is arranged on both sides of the material bearing platform, and the output of the lifting mechanism is A lifting bracket is fixed at the end, and the lifting bracket is slidably connected to the base through the lifting guide rail. The top of the lifting bracket is fixed with a pressing plate, and the pressing plate is located directly above the material bearing platform. The output end is connected with a rotating shaft, and the rotating shaft is connected with two belt drive mechanisms, and the two belt drive mechanisms are respectively located on both sides of the material-bearing platform; the belt drive mechanism includes a driving wheel and a first driven wheel, and the driving wheel and the driven wheel are wound around With feeding belt.

Further, the lifting mechanism is a linear bearing cylinder.

Further, the lifting guide rail is a cross roller guide rail.

Further, a plurality of through holes are provided on the pressing plate.

Further, a baffle plate is fixed in the lifting bracket, and the baffle plate is located outside one end of the material bearing platform.

Further, the base is further provided with a first photoelectric sensor, and the first photoelectric sensor is located outside the end of the material-bearing platform away from the material baffle plate.

Further, the lifting bracket is also provided with a second photoelectric sensor, and the second photoelectric sensor is located on one side of the baffle plate.

Further, the belt drive mechanism further includes a second driven wheel, the second driven wheel is located above the driving wheel, and the feeding belt is also arranged around the second driven wheel.

The beneficial effects of the utility model are as follows: the utility model discloses a stable lead frame flattening device, which is provided with a reliable belt feeding mechanism, so that the lead frame can be sent directly below the pressing plate, and the structure of each part of the lead frame can be ensured Reliable flattening process can be obtained, and the lead frame will not move before the flattening contacts the blanking plate, which can prevent the lead frame from shifting during the flattening process and affect the machining accuracy.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is a schematic three-dimensional structural diagram of the present invention from another perspective.

Figure 3 is a schematic diagram of the three-dimensional structure of the utility model when feeding or discharging.

FIG. 4 is a schematic view of the three-dimensional structure of the utility model when pressing material.

Reference numerals are: base 10, material bearing platform 11, lifting mechanism 12, lifting guide rail 13, first photoelectric sensor 14, lifting bracket 20, pressing plate 21, through hole 211, driving motor 22, rotating shaft 23, material baffle 24. The second photoelectric sensor 25, the belt drive mechanism 30, the driving pulley 31, the first driven pulley 32, the feeding belt 33, the second driven pulley 34, and the lead frame 40.

Detailed ways

In order to further understand the features, technical means, and specific goals and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Refer to Figures 1 to 4.

The embodiment of the utility model discloses a stable lead frame flattening device, which includes a base 10, a material bearing platform 11 is arranged on the base 10, and at least one lifting mechanism 12 is arranged on both sides of the material bearing platform 11. A lift bracket 20 is fixed at the output end, and the lift bracket 20 is slidably connected to the base 10 through the lift guide rail 13 , that is, the lift bracket 20 can move up and down relative to the base 10 , and the top of the lift bracket 20 is fixed with a pressing plate 21 and a pressing plate 21 Located just above the material bearing platform 11, a drive motor 22 is provided on one side of the lifting bracket 20, and the output end of the driving motor 22 is connected with a rotating shaft 23 through a coupling. Preferably, the rotating shaft 23 is rotatably connected to the lifting bracket 20 through a bearing, The rotating shaft 23 is connected with two belt drive mechanisms 30, and the two belt drive mechanisms 30 are respectively located on both sides of the material-bearing platform 11; the belt drive mechanism 30 includes a driving pulley 31 and a first driven pulley 32. The pulley 31 and the first driven pulley 32 are located outside the two ends of the material-bearing platform 11, respectively, and a feeding belt 33 is wound between the driving pulley 31 and the driven pulley. Preferably, the feeding belt 33 is a rubber belt with good friction performance. The stability of the forward motion of the driving lead frame 40 can be effectively improved. The feeding belt 33 is located below the pressing plate 21 , and the two feeding belts 33 are located on both sides of the material bearing platform 11 respectively.

During feeding, as shown in FIG. 3 , the lifting mechanism 12 drives the lifting bracket 20 to rise, the belt driving mechanism 30 rises following it, and the two feeding belts 33 rise to the upper sides of the two sides of the material receiving platform 11 , and the external mechanism sends the lead frame 40 to the upper side. Into the feeding belt 33, the lead frame 40 is supported on the two feeding belts 33, and the driving motor 22 drives the feeding belt 33 to rotate forward through the rotating shaft 23, thereby driving the lead frame 40 to advance to the right below the pressing plate 21; When feeding, as shown in FIG. 4 , the lifting mechanism 12 drives the lifting bracket 20 to descend, the belt drive mechanism 30 follows to descend, the two feeding belts 33 descend to the bottom of the two sides of the material-bearing platform 11, and the lead frame 40 is supported on the material-bearing platform 11. On the platform 11, the lifting mechanism 12 continues to drive the lifting bracket 20 to descend, and the material pressing plate 21 presses the lead frame 40 on the material bearing platform 11, and the material pressing plate 21 cooperates with the material bearing platform 11 to flatten the lead frame 40; As shown in FIG. 3 , the lifting mechanism 12 drives the lifting bracket 20 to rise, the belt driving mechanism 30 rises accordingly, the two feeding belts 33 rise to the upper sides of the two sides of the feeding platform 11 , and the lead frame 40 is transferred to the two feeding belts 33 On the other hand, the driving motor 22 reversely drives the feeding belt 33 to reverse rotation through the rotating shaft 23, thereby driving the lead frame 40 to return to the outside.

The utility model is provided with a reliable belt feeding mechanism 30, so that the lead frame 40 can be sent to the right under the pressing plate 21, which can ensure that each part of the lead frame 40 can obtain reliable flattening processing, and when the flattening contacts the pressing material Before the board 21, the lead frame 40 will not move, which can prevent the lead frame 40 from shifting during the flattening process and affecting the machining accuracy.

In this embodiment, the lifting mechanism 12 is a linear bearing cylinder, and the driving action of the linear bearing cylinder is stable, which can effectively drive the lifting bracket 20 to achieve a stable lifting action.

In this embodiment, the elevating guide rail 13 is a cross roller guide rail. The cross roller guide rail is composed of two guide rails with V-shaped raceways, roller cage cylindrical rollers, etc. The reciprocating motion of the precision-ground V-shaped raceway surface can bear loads in all directions, realize high-precision and stable linear motion, and further improve the stability of the lifting action of the lifting platform.

In this embodiment, a plurality of through holes 211 are provided on the holding plate 21, and the through holes 211 have the function of air circulation. When the holding plate 21 is pressed against the lead frame 40 on the material receiving platform 11, the air can effectively pass through the holes 211 is released to prevent the lead frame 40 from shifting during the pressing process.

In this embodiment, a baffle plate 24 is fixed in the lifting bracket 20 , the baffle plate 24 is located outside one end of the material receiving platform 11 , the baffle plate 24 is placed upright, and the baffle plate 24 protrudes from two belt drives The highest plane on which the mechanism 30 is located can effectively ensure a reliable material stopper function, and prevent the lead frame 40 on the feeding belt 33 from advancing excessively and leaving the processing station.

Based on the above embodiment, the base 10 is further provided with a first photoelectric sensor 14, and the first photoelectric sensor 14 is located outside the end of the material bearing platform 11 away from the baffle plate 24. Preferably, the first photoelectric sensor 14 is an optical fiber sensor, used for It is detected whether there is a lead frame 40 passing by, so as to ensure the reliability of the feeding action.

Based on the above-mentioned embodiment, the lifting bracket 20 is further provided with a second photoelectric sensor 25, and the second photoelectric sensor 25 is located at one side of the baffle plate 24. Preferably, the second photoelectric sensor 25 is an optical fiber sensor for detecting the lead frame 40. Whether to reach the baffle plate 24 to achieve alignment.

In this embodiment, the belt drive mechanism 30 further includes a second driven pulley 34, the second driven pulley 34 is located above the driving pulley 31, the feeding belt 33 is also arranged around the second driven pulley 34, the second driven pulley 34 and the first pulley 34 A driven wheel 32 is located at the same level, and the rotating shaft 23 is located in the horizontal plane below the second driven wheel 34 and the first driven wheel 32, which can effectively facilitate the layout of the driving motor 22 and other structures, and can effectively reduce the assembly and processing difficulty of the device.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (8)

1. A stable lead frame flattening device, characterized in that it comprises a base (10), and a material-bearing platform (11) is provided on the base (10), and both sides of the material-bearing platform (11) are At least one lifting mechanism (12) is provided, an output end of the lifting mechanism (12) is fixed with a lifting bracket (20), and the lifting bracket (20) is slidably connected to the base (10) through a lifting guide rail (13) , the top of the lifting bracket (20) is fixed with a pressing plate (21), the pressing plate (21) is located directly above the material bearing platform (11), and one side of the lifting bracket (20) is A drive motor (22) is provided, the output end of the drive motor (22) is connected with a rotating shaft (23), the rotating shaft (23) is connected with two belt drive mechanisms (30), the two belt drive mechanisms (30) ) are respectively located on both sides of the material bearing platform (11); the belt drive mechanism (30) includes a driving wheel (31) and a first driven wheel (32), the driving wheel (31) and the driven wheel A feeding belt (33) is wound therebetween. 2 . The stable lead frame flattening device according to claim 1 , wherein the lifting mechanism ( 12 ) is a linear bearing cylinder. 3 . 3. A stable lead frame flattening device according to claim 1 or 2, characterized in that the elevating guide rail (13) is a cross roller guide rail. 4 . The stable lead frame flattening device according to claim 1 , wherein a plurality of through holes ( 211 ) are provided on the pressing plate ( 21 ). 5 . 5. A stable lead frame flattening device according to claim 1, wherein a baffle plate (24) is fixed in the lifting bracket (20), and the baffle plate (24) is located at the out of one end of the described material-bearing platform (11). 6. A stable lead frame flattening device according to claim 5, characterized in that a first photoelectric sensor (14) is further provided on the base (10), and the first photoelectric sensor (14) It is located outside the end of the material bearing platform (11) away from the material baffle plate (24). 7. A stable lead frame flattening device according to claim 6, characterized in that a second photoelectric sensor (25) is further provided in the lifting bracket (20), and the second photoelectric sensor (25) ) is located on one side of the baffle plate (24). 8 . The stable lead frame flattening device according to claim 1 , wherein the belt drive mechanism ( 30 ) further comprises a second driven wheel ( 34 ), the second driven wheel ( 34 ) Located above the driving pulley (31), the feeding belt (33) is also arranged around the second driven pulley (34).

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