CN219177289U

CN219177289U - High-speed stable imaging moving mechanism of large-size lead frame linear array camera

Info

Publication number: CN219177289U
Application number: CN202223452238.7U
Authority: CN
Inventors: 谭鹰; 王桥会; 徐小胜; 彭小平; 阮豪峰; 赵尔金; 李江涛; 宋奇瑜; 杨天宇
Original assignee: Ningbo Yunsheng Intelligent Software Co ltd; NINGBO YUNSHENG INTELLIGENT TECHNOLOGY CO LTD
Current assignee: Ningbo Yunsheng Intelligent Software Co ltd; NINGBO YUNSHENG INTELLIGENT TECHNOLOGY CO LTD
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-06-13
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a high-speed stable imaging moving mechanism of a large-size lead frame linear array camera, which comprises a main supporting plate, a supporting component, a driving component and a pressing component, wherein a hollow groove is formed in the main supporting plate, the supporting component comprises a first linear guide rail, a second linear guide rail, a first supporting bar, a second supporting bar and four sliding blocks, the pressing component comprises n first pressing head components and n second pressing head components, the n first pressing head components are arranged on the first supporting bar, the n second pressing head components are arranged on the second supporting bar, the n first pressing head components and the n second pressing head components press the left side and the right side of a lead frame, and the driving component adjusts the first supporting bar and the second supporting bar to tension the wide side of the lead frame, so that the lead frame is integrally kept to be horizontally and not sagged; the advantage is that lead frame can not produce same sagging, also can not produce the shake when quick travel to greatly reduced detects the misjudgement rate, improved detection efficiency simultaneously.

Description

High-speed stable imaging moving mechanism of large-size lead frame linear array camera

Technical Field

The utility model relates to a high-speed stable imaging moving mechanism of a large-size lead frame linear array camera, in particular to an imaging moving mechanism.

Background

The lead frame is used as a chip carrier of the integrated circuit, and is used for realizing the electrical connection between the lead-out end of the internal circuit of the chip and the outer lead, forming a key structural member of the integrated circuit and playing a role of a bridge for connecting the internal circuit of the chip and the external lead. With the continuous development of the moore law of the integrated circuits at present, the demands of the market on lead frames also tend to be high-precision and large-size, and with the increase of the value of chips, the downstream quality requirements on the lead frames obviously become strict. In the market direction, the permeability of automatic optical inspection AOI is continuously improved in recent years, whether the lead frame industry is a head enterprise or a middle-low end enterprise.

Lead frame surface defect detection is the final link for controlling production quality. Existing lead frame surface defect detection systems are implemented based on visual inspection techniques and typically include a line camera, a terminal processor mounted with image processing algorithms, and an imaging movement mechanism for passing the lead frame under the line camera. The imaging moving mechanism generally comprises a carrying platform and a linear moving mechanism for driving the carrying platform to move, a hollowed-out groove is formed in the middle of the carrying platform, supporting bars are respectively arranged at the front end and the rear end of the carrying platform, and the supporting bars are used for supporting the lead frame above the hollowed-out groove. During detection, the camera is fixed above the carrying platform, the light source is fixed below the carrying platform, light emitted by the light source passes through the hollow groove to provide illumination for camera shooting, the lead frame is placed on supporting bars at the front end and the rear end of the carrying platform, the carrying platform is driven to move on the detection station through the linear moving mechanism, the lead frame moves at a constant speed under the linear array camera along with the carrying platform, at the moment, an image of the lead frame obtained through shooting by the linear array camera is transmitted to the terminal processor, and the terminal processor can realize surface defect identification of the lead frame through an image processing algorithm.

In the lead frame surface defect detection system, the support bars generally support the left and right parts of the lead frames with the width of 5mm at the front and rear end edges, so that when the lead frames with smaller size and harder materials are detected, the lead frames do not droop at the hollowed-out grooves, the imaging quality of the linear array camera is good, but for large-size lead frames with the width of more than 80mm and the length of more than 250mm and softer materials, the lead frames naturally droop at the hollowed-out grooves, obvious shadows appear in the imaging of the linear array camera, and therefore, a large amount of misjudgment occurs, and the misjudgment rate is high; meanwhile, if the carrier is operated at too high a speed, the lead frame can generate larger shake on the carrier, and the imaging quality of the linear array camera can be obviously deteriorated, so that the carrier is usually not operated at too high a speed in order to avoid the shake problem, but the detection efficiency is not improved.

Therefore, when the existing lead frame surface defect detection system detects a large-size lead frame, the detection misjudgment rate is higher, and the detection efficiency is not improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a high-speed stable imaging moving mechanism of a large-size lead frame linear camera, when the moving mechanism is used for moving the large-size lead frame through the linear camera, the large-size lead frame cannot droop or shake, so that the detection misjudgment rate is greatly reduced, and the detection efficiency is improved.

The novel technical scheme adopted for solving the technical problems is as follows: the high-speed stable imaging moving mechanism of the large-size lead frame linear array camera comprises a main supporting plate, a supporting component, a driving component and a pressing component, wherein a hollowed-out groove penetrating up and down is formed in the main supporting plate, the supporting component comprises two linear guide rails, two supporting bars and four sliding blocks, the two linear guide rails are respectively called a first linear guide rail and a second linear guide rail, the two supporting bars are respectively called a first supporting bar and a second supporting bar, the four sliding blocks are respectively called a first sliding block, a second sliding block, a third sliding block and a fourth sliding block, the first linear guide rail is arranged in the left-right direction and is fixed at the front end of the main supporting plate, the second linear guide rail is arranged in the left-right direction and is fixed at the rear end of the main supporting plate, the first sliding block and the second sliding block are installed on the first linear guide rail, the first sliding block is positioned on the left side of the second sliding block, the third sliding block and the fourth sliding block are respectively called a first sliding block, the fourth sliding block and the fourth sliding block is positioned on the left-right side of the second linear guide rail; the first support bar and the second support bar are arranged at left and right intervals, the first support bar is positioned at the left side of the second support bar, the first support bar is parallel to the second support bar, two ends of the first support bar are fixedly connected with the first sliding block and the third sliding block respectively, two ends of the second support bar are fixedly connected with the second sliding block and the fourth sliding block respectively, and the first support bar and the second support bar are in a vertical state with the first linear guide rail and the second linear guide rail; the hollow groove is positioned between the first supporting bar and the second supporting bar; the driving assembly is used for driving the first supporting bar and the second supporting bar to move oppositely or reversely and adjusting the distance between the first supporting bar and the second supporting bar; the material pressing assembly comprises n first material pressing head assemblies and n second material pressing head assemblies, n is an integer greater than or equal to 4, the n first material pressing head assemblies are installed on the first supporting bars at intervals, the n second material pressing head assemblies are installed on the second supporting bars at intervals, the n first material pressing head assemblies are used for pressing the left side edges of the lead frames, and the n second material pressing head assemblies are used for pressing the right side edges of the lead frames.

Each first material pressing head assembly comprises a cylinder fixing piece, a needle cylinder, a first spring, a second spring, a material pressing head and a first pin shaft, wherein the cylinder fixing piece is arranged on the first supporting bar, a left-right penetrating through hole is formed in the cylinder fixing piece, the needle cylinder is arranged on the left side of the cylinder fixing piece, a needle head part of the needle cylinder is positioned in the through hole and can extend out of the through hole, the first spring and the second spring are respectively positioned on the front side and the rear side of the cylinder fixing piece, the axial directions of the first spring and the second spring are the same as the axial directions of the through hole, the left ends of the first spring and the second spring are respectively fixed on the cylinder fixing piece, the material pressing head comprises a connecting block and a pressing block, the bottom of the connecting block is arranged on the first supporting bar through a rotating shaft, the axial direction of the rotating shaft is the front-back direction, the pressing block is positioned on the right side of the connecting block, the pressing block is fixed on the upper part of the connecting block, the bottom of the pressing block is a plane, the first pin shaft is fixed on the connecting block, the axial direction of the first pin shaft is perpendicular to the axial direction of the through hole, the right ends of the first spring and the second spring are respectively fixed on the first pin shaft, the lower part of the connecting block is provided with a guide groove which penetrates left and right, the right side of the cylinder fixing piece is fixed with a guide plate, the guide plate is inserted into the guide groove, in an initial state, the first spring and the second spring are in a compression state, the connecting block is inclined leftwards, when the first spring and the second spring are stretched, the connecting block is perpendicular to the first supporting bar, and the bottom of the pressing block is positioned on a horizontal plane; the n second material pressing head assemblies are in one-to-one correspondence with the n first material pressing head assemblies, and the corresponding second material pressing head assemblies and first material pressing head assemblies are arranged in bilateral symmetry.

The first support bar on the interval install n first limit stub bar, n first limit stub bar and n first pressure stub bar subassembly are crisscross to be set up, every first limit stub bar's right-hand member face be the inclined plane, and this inclined plane is 45 degrees with the contained angle between the horizontal plane from right left up slope, the second support bar on the interval install n second limit stub bar, n second limit stub bar and n crisscross setting of second pressure stub bar subassembly, n second limit stub bar and n first limit stub bar one-to-one, a corresponding second limit stub bar and a first limit stub bar bilateral symmetry set up.

The driving assembly comprises a motor, two ball screws, four synchronous pulleys, two synchronous belts and four width adjusting blocks, wherein the two ball screws are respectively called a first ball screw and a second ball screw, the four synchronous pulleys are respectively called a first synchronous pulley, a second synchronous pulley, a third synchronous pulley and a fourth synchronous pulley, the two synchronous belts are respectively called a first synchronous belt and a second synchronous belt, the four width adjusting blocks are respectively called a first width adjusting block, a second width adjusting block, a third width adjusting block and a fourth width adjusting block, the first ball screw is arranged on the main supporting plate and positioned at the front side of the first linear guide, the second ball screw is arranged on the main supporting plate and positioned at the rear side of the second linear guide, the first linear guide, the second linear guide, the first ball screw and the fourth synchronous pulley are mutually parallel, the first synchronous pulley is fixed at the right end of the first synchronous pulley, the second synchronous pulley is fixed at the right end of the second synchronous pulley, the fourth synchronous pulley is fixed at the front side of the second synchronous pulley and the fourth synchronous pulley, the output shaft of the fourth synchronous pulley is fixed at the front side of the second synchronous pulley and the fourth synchronous pulley is fixed at the front side of the second synchronous pulley, the fourth synchronous pulley is fixed at the front side of the second synchronous pulley is fixed at the second synchronous pulley, the first width adjusting block is fixed at the front end of the first supporting bar, the second width adjusting block is fixed at the front end of the second supporting bar, the third width adjusting block is fixed at the rear end of the first supporting bar, the fourth width adjusting block is fixed at the rear end of the second supporting bar, the first ball screw penetrates through the first width adjusting block and the third width adjusting block respectively, the first width adjusting block is in threaded connection with the third width adjusting block and the first ball screw, the second ball screw penetrates through the second width adjusting block and the fourth width adjusting block respectively, and the second width adjusting block is in threaded connection with the fourth width adjusting block and the second ball screw.

Compared with the prior art, the high-speed stable imaging moving mechanism of the large-size lead frame linear array camera is formed by the main supporting plate, the supporting component, the driving component and the pressing component, wherein the main supporting plate is provided with the hollowed-out grooves penetrating up and down, the supporting component comprises two linear guide rails, two supporting strips and four sliding blocks, the two linear guide rails are respectively called a first linear guide rail and a second linear guide rail, the two supporting strips are respectively called a first supporting strip and a second supporting strip, the four sliding blocks are respectively called a first sliding block, a second sliding block, a third sliding block and a fourth sliding block, the first linear guide rail is arranged in the left-right direction and is fixed at the front end of the main supporting plate, the second linear guide rail is arranged in the left-right direction and is fixed at the rear end of the main supporting plate, the first sliding block and the second sliding block are arranged on the first linear guide rail, the first sliding block is positioned at the left side of the second sliding block, the third sliding block and the fourth sliding block are arranged on the second linear guide rail, and the fourth sliding block is stressed to move left-right along the second linear guide rail, and the fourth sliding block is positioned at the left side of the fourth sliding block; the first support bar and the second support bar are arranged at left and right intervals, the first support bar is positioned at the left side of the second support bar, the first support bar is parallel to the second support bar, two ends of the first support bar are fixedly connected with the first sliding block and the third sliding block respectively, two ends of the second support bar are fixedly connected with the second sliding block and the fourth sliding block respectively, and the first support bar and the second support bar are in a vertical state with the first linear guide rail and the second linear guide rail; the hollow groove is positioned between the first supporting bar and the second supporting bar; the driving assembly is used for driving the first supporting bar and the second supporting bar to move oppositely or reversely and adjusting the distance between the first supporting bar and the second supporting bar; the press assembly comprises n first press head assemblies and n second press head assemblies, n is an integer greater than or equal to 4, the n first press head assemblies are installed on the first support bar at intervals, the n second press head assemblies are installed on the second support bar at intervals, the n first press head assemblies are used for pressing the left side edge of the lead frame, the n second press head assemblies are used for pressing the right side edge of the lead frame, when the press assembly is used in a lead frame surface defect detection system, the high-speed stable imaging moving mechanism of the large-size lead frame linear array camera is installed on a moving sliding table, the linear array camera is installed above a main supporting plate, a light source is installed below the main supporting plate, light rays emitted by the light source are opposite to a hollowed-out groove on the main supporting plate, before detection, according to the width of the lead frame, the positions of the first supporting bars and the second supporting bars are adjusted through the driving assembly, when two wide edges of the lead frame are placed on the first supporting bars and the second supporting bars, the part with the width of about 5mm is supported by the first supporting bars and the second supporting bars, when the lead frame is placed on the first supporting bars and the second supporting bars, n first material pressing head assemblies and n second material pressing head assemblies press the long edge of the left side of the lead frame, n second material pressing head assemblies press the right edge of the lead frame, at the moment, the lead frame is partially sagged under the action of gravity, and the distance between the first supporting bars and the second supporting bars is adjusted through the driving assembly again, so that the wide edge direction of the lead frame is tensioned, and the whole lead frame is kept horizontally and not sagged; then, the moving sliding table drives the high-speed stable imaging moving mechanism of the large-size lead frame linear camera to move at a constant speed through the lower part of the linear camera, the linear camera shoots high-quality pictures, the lead frame is tensioned in the broadside direction and cannot generate sagging, the long side direction is tightly pressed by n first material pressing head assemblies and n second material pressing head assemblies, and shake cannot be generated during rapid movement, so that the detection misjudgment rate is greatly reduced, and meanwhile, the detection efficiency is improved.

Drawings

FIG. 1 is a perspective view of a high-speed stable imaging movement mechanism of a large-size lead frame line camera of the present utility model;

FIG. 2 is an exploded view of a high-speed stable imaging movement mechanism of a large-size leadframe linear camera of the present utility model;

FIG. 3 is a perspective view of a first presser head assembly of the high speed stable imaging movement mechanism of the large size leadframe linear camera of the present utility model;

FIG. 4 is an exploded view of a first presser head assembly of a high speed stable imaging movement mechanism of a large size leadframe linear camera of the present utility model;

fig. 5 is a schematic installation view of a high-speed stable imaging moving mechanism of a large-size lead frame line camera of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Embodiment one: as shown in fig. 1 and 2, a high-speed stable imaging moving mechanism of a large-size lead frame linear array camera comprises a main supporting plate 1, a supporting component, a driving component and a pressing component, wherein a hollow groove 2 penetrating up and down is formed in the main supporting plate 1, the supporting component comprises two linear guide rails, two supporting strips and four sliding blocks, the two linear guide rails are respectively called a first linear guide rail 3 and a second linear guide rail 4, the two supporting strips are respectively called a first supporting strip 5 and a second supporting strip 6, the four sliding blocks are respectively called a first sliding block 7, a second sliding block 8, a third sliding block 9 and a fourth sliding block 10, the first linear guide rail 3 is arranged in the left-right direction and is fixed at the front end of the main supporting plate 1, the second linear guide rail 4 is arranged in the left-right direction and is fixed at the rear end of the main supporting plate 1, the first sliding block 7 and the second sliding block 8 are installed on the first linear guide rail 3, the first sliding block 7 is positioned at the left side of the second sliding block 8, the third sliding block 9 and the fourth sliding block 10 are installed on the second linear guide rail 4 and are positioned at the left side of the fourth sliding block 10 along the left-right direction, and the fourth sliding block 10 is positioned at the left side of the fourth sliding block 4; the first support bar 5 and the second support bar 6 are arranged at left and right intervals, the first support bar 5 is positioned at the left side of the second support bar 6, the first support bar 5 is parallel to the second support bar 6, two ends of the first support bar 5 are respectively fixedly connected with the first sliding block 7 and the third sliding block 9, two ends of the second support bar 6 are respectively fixedly connected with the second sliding block 8 and the fourth sliding block 10, and the first support bar 5 and the second support bar 6 are in a vertical state with the first linear guide rail 3 and the second linear guide rail 4; the hollow groove 2 is positioned between the first supporting bar 5 and the second supporting bar 6; the driving component is used for driving the first supporting bar 5 and the second supporting bar 6 to move in opposite directions or move in opposite directions, and adjusting the distance between the first supporting bar 5 and the second supporting bar 6; the material pressing components comprise n first material pressing head components 11 and n second material pressing head components 12, n is an integer greater than or equal to 4, n first material pressing head components 11 are installed on the first supporting bar 5 at intervals, n second material pressing head components 12 are installed on the second supporting bar 6 at intervals, n first material pressing head components 11 are used for pressing the left side edge of the lead frame, and n second material pressing head components 12 are used for pressing the right side edge of the lead frame.

Embodiment two: this embodiment is substantially identical to embodiment one, except that: as shown in fig. 3 and 4, in this embodiment, each first presser head assembly 11 includes a cylinder fixing member 13, a needle cylinder 14, a first spring 15, a second spring 16, a presser head 17 and a first pin 18, the cylinder fixing member 13 is mounted on the first support bar 5, a through hole 19 penetrating right and left is provided on the cylinder fixing member 13, the needle cylinder 14 is mounted on the left side of the cylinder fixing member 13, the needle point of the needle cylinder 14 is located in the through hole 19 and can extend from the through hole 19, the first spring 15 and the second spring 16 are located on the front and rear sides of the cylinder fixing member 13, the axial directions of the first spring 15 and the second spring 16 are the same as the axial directions of the through hole 19, the left ends of the first spring 15 and the second spring 16 are fixed on the cylinder fixing member 13, the presser head 17 includes a connection block 20 and a pressing block 21, the bottom of the connecting block 20 is arranged on the first support bar 5 through a rotating shaft 22, the axial direction of the rotating shaft 22 is in the front-back direction, a pressing block 21 is positioned on the right side of the connecting block 20, the pressing block 21 is fixed on the upper part of the connecting block 20, the bottom of the pressing block 21 is a plane, a first pin shaft 18 is fixed on the connecting block 20, the axial direction of the first pin shaft 18 is perpendicular to the axial direction of a through hole 19, the right ends of a first spring 15 and a second spring 16 are respectively fixed on the first pin shaft 18, a guide groove 23 penetrating left and right is arranged at the lower part of the connecting block 20, a guide plate 24 is fixed on the right side of the cylinder fixing piece 13, the guide plate 24 is inserted into the guide groove 23, in an initial state, the first spring 15 and the second spring 16 are in a compressed state, the connecting block 20 is inclined leftwards, when the first spring 15 and the second spring 16 are stretched, the connecting block 20 is perpendicular to the first support bar 5, and the bottom of the pressing block 21 is positioned on the horizontal plane; the n second material pressing head assemblies 12 are in one-to-one correspondence with the n first material pressing head assemblies 11, and the corresponding second material pressing head assemblies 12 and first material pressing head assemblies 11 are symmetrically arranged left and right.

In this embodiment, n first material limiting heads 25 are installed on the first support bar 5 at intervals, n first material limiting heads 25 are staggered with n first material pressing head assemblies 11, the right end face of each first material limiting head 25 is an inclined face, the inclined face is inclined from right to left and upwards, an included angle between the inclined face and a horizontal plane is 45 degrees, n second material limiting heads 26 are installed on the second support bar 6 at intervals, n second material limiting heads 26 are staggered with n second material pressing head assemblies 12, n second material limiting heads 26 are in one-to-one correspondence with n first material limiting heads 25, and one corresponding second material limiting head 26 and one first material limiting head 25 are arranged in bilateral symmetry.

In the present embodiment, the driving unit includes a motor 27, two ball screws, four timing pulleys, two timing belts and four width adjustment blocks, the two ball screws are respectively referred to as a first ball screw 28 and a second ball screw 29, the four timing pulleys are respectively referred to as a first timing pulley 30, a second timing pulley 31, a third timing pulley 32 and a fourth timing pulley 33, the two timing belts are respectively referred to as a first timing belt 34 and a second timing belt 35, the four width adjustment blocks are respectively referred to as a first width adjustment block 36, a second width adjustment block 37, a third width adjustment block 38 and a fourth width adjustment block 39, the first ball screw 28 is mounted on the main carrier 1 and located on the front side of the first linear guide 3, the second ball screw 29 is mounted on the main carrier 1 and located on the rear side of the second linear guide 4, the first linear guide 3, the second linear guide 4, the first ball screw 28 and the second ball screw 29 are parallel to each other, the first synchronous pulley 30 is fixed at the right end of the first ball screw 28, the second synchronous pulley 31 is fixed at the right end of the second ball screw 29, the third synchronous pulley 32 and the fourth synchronous pulley 33 are positioned between the first synchronous pulley 30 and the second synchronous pulley 31, the third synchronous pulley 32 is positioned at the front side of the fourth synchronous pulley 33, the first synchronous belt 34 is looped over the first synchronous pulley 30 and the third synchronous pulley 32, the second synchronous belt 35 is looped over the second synchronous pulley 31 and the fourth synchronous pulley 33, the motor 27 is fixed at the right side of the main supporting plate 1, the third synchronous pulley 32 and the fourth synchronous pulley 33 are respectively fixedly connected with the output shaft of the motor 27, the first width adjusting block 36 is fixed at the front end of the first supporting bar 5, the second width adjusting block 37 is fixed at the front end of the second supporting bar 6, the third width adjusting block 38 is fixed at the rear end of the first supporting bar 5, the fourth width adjusting block 39 is fixed at the rear end of the second supporting bar 6, the first ball screw 28 respectively passes through the first width adjusting block 36 and the third width adjusting block 38, the first width adjusting block 36 and the third width adjusting block 38 are in threaded connection with the first ball screw 28, the second ball screw 29 respectively passes through the second width adjusting block 37 and the fourth width adjusting block 39, and the second width adjusting block 37 and the fourth width adjusting block 39 are in threaded connection with the second ball screw 29; when the motor 27 is operated, the output shaft of the motor 27 drives the third synchronous pulley 32 and the fourth synchronous pulley 33 to synchronously rotate, the third synchronous pulley 32 drives the first synchronous pulley 30 to rotate through the first synchronous belt 34, the first synchronous pulley 30 drives the first ball screw 28 to rotate, the fourth synchronous pulley 33 drives the second synchronous pulley 31 to rotate through the second synchronous belt 35, the second synchronous pulley 31 drives the second ball screw 29 to rotate, the first ball screw 28 and the second ball screw 29 rotate in opposite directions, at this time, the first width adjusting block 36 and the third width adjusting block 38 move left and right along the first ball screw 28, the second width adjusting block 37 and the fourth width adjusting block 39 move left and right along the second ball screw 29, so as to drive the first supporting bar 5 and the second supporting bar 6 to synchronously move left and right relative to the first linear guide rail 3 and the second linear guide rail 4, so that the first supporting bar 5 and the second supporting bar 6 are close to or far away, and the distance between the first supporting bar 5 and the second supporting bar 6 is adjusted.

When the high-speed stable imaging moving mechanism of the large-size lead frame linear array camera of the embodiment is used in the lead frame surface defect detecting system, as shown in fig. 5, the high-speed stable imaging moving mechanism of the large-size lead frame linear array camera is arranged on a moving sliding table 40, the linear array camera is arranged above the main supporting plate 1, the light source is arranged below the main supporting plate 1, the light emitted by the light source is opposite to the hollowed-out groove 2 on the main supporting plate 1, before the detection, the motor 27 is started according to the width of the lead frame, the motor 27 is rotated to drive the third synchronous pulley 32 and the fourth synchronous pulley 33 to synchronously rotate, at the moment, the first synchronous pulley 34 and the second synchronous pulley 35 drive the first synchronous pulley 30 and the second synchronous pulley 31 to synchronously and reversely rotate, the first synchronous pulley 30 and the second synchronous pulley 31 drive the first ball screw 28 and the second ball screw 29, the first ball screw 28 and the second ball screw 29 drive the first support bar 5 and the second support bar 6 to move in the left-right direction through four width adjustment blocks, thereby adjusting the positions of the first support bar 5 and the second support bar 6, when two wide sides of the lead frame are placed on the first support bar 5 and the second support bar 6, the left-right part of the width 5mm is supported by the first support bar 5 and the second support bar 6, the n first material pressing head assemblies 11 and the n second material pressing head assemblies 12 are all in an initial state, when the lead frame is placed on the first support bar 5 and the second support bar 6, the n first material limiting heads 25 and the n second material limiting heads 26 limit the lead frame, the long side edges of the lead frame are respectively contacted with the n first material limiting heads 25 and the n second material limiting heads 26, then the first material pressing head assemblies 11 and the second material pressing head assemblies 12 are operated to press materials, at this time, the needle head part of the air cylinder in the first material pressing head assembly 11 stretches out from the through hole 19 to push the connecting block 20 to rotate rightwards, so that the pressing block 21 rotates to the bottom to horizontally press the left long edge of the lead frame, and due to the existence of the elastic force of the first spring 15 and the second spring 16, a part of the thrust force of the air cylinder in the first material pressing head assembly 11 is counteracted by the first spring 15 and the second spring 16, so that the pressing block 21 can press the left long edge of the lead frame, and the left long edge of the lead frame is not damaged, and similarly, the second material pressing head assembly 12 presses the right edge of the lead frame, and the right long edge of the lead frame is not damaged, at this time, the lead frame is partially sagged under the action of gravity, and the distance between the first support bar 5 and the second support bar 6 is adjusted through the motor 27 again, so that the wide edge direction of the lead frame is tensioned, and the whole lead frame is kept horizontally and is not sagged; then, the moving sliding table 40 drives the high-speed stable imaging moving mechanism of the large-size lead frame linear camera to move at a constant speed through the lower part of the linear camera, the linear camera shoots high-quality pictures, because the lead frame is tensioned in the broadside direction and cannot generate sagging, the long-side direction is tightly pressed by the n first material pressing head assemblies 11 and the n second material pressing head assemblies 12, and shake cannot be generated during rapid movement, so that the detection misjudgment rate is greatly reduced, and meanwhile, the detection efficiency is improved.

Claims

1. The high-speed stable imaging moving mechanism of the large-size lead frame linear array camera is characterized by comprising a main supporting plate, a supporting component, a driving component and a pressing component, wherein a hollowed-out groove penetrating up and down is formed in the main supporting plate, the supporting component comprises two linear guide rails, two supporting strips and four sliding blocks, the two linear guide rails are respectively called a first linear guide rail and a second linear guide rail, the two supporting strips are respectively called a first supporting strip and a second supporting strip, the four sliding blocks are respectively called a first sliding block, a second sliding block, a third sliding block and a fourth sliding block, the first linear guide rail is arranged in the left-right direction and is fixed at the front end of the main supporting plate, the second linear guide rail is arranged in the left-right direction and is fixed at the rear end of the main supporting plate, the first sliding block and the second sliding block are installed on the first linear guide rail, the first sliding block is positioned on the left side of the second sliding block, the fourth sliding block is positioned on the left side of the second sliding block, and the third sliding block and the fourth sliding block is installed on the left side of the second linear guide rail; the first support bar and the second support bar are arranged at left and right intervals, the first support bar is positioned at the left side of the second support bar, the first support bar is parallel to the second support bar, two ends of the first support bar are fixedly connected with the first sliding block and the third sliding block respectively, two ends of the second support bar are fixedly connected with the second sliding block and the fourth sliding block respectively, and the first support bar and the second support bar are in a vertical state with the first linear guide rail and the second linear guide rail; the hollow groove is positioned between the first supporting bar and the second supporting bar; the driving assembly is used for driving the first supporting bar and the second supporting bar to move oppositely or reversely and adjusting the distance between the first supporting bar and the second supporting bar; the material pressing assembly comprises n first material pressing head assemblies and n second material pressing head assemblies, n is an integer greater than or equal to 4, the n first material pressing head assemblies are installed on the first supporting bars at intervals, the n second material pressing head assemblies are installed on the second supporting bars at intervals, the n first material pressing head assemblies are used for pressing the left side edges of the lead frames, and the n second material pressing head assemblies are used for pressing the right side edges of the lead frames.

2. The high-speed stable imaging moving mechanism of large-size lead frame linear array camera according to claim 1, wherein each of said first presser head assembly comprises a cylinder fixing member, a needle cylinder, a first spring, a second spring, a presser head and a first pin shaft, said cylinder fixing member is mounted on said first support bar, said cylinder fixing member is provided with a through hole penetrating left and right, said needle cylinder is mounted on the left side of said cylinder fixing member, the needle head portion of said needle cylinder is located in said through hole and can protrude from said through hole, said first spring and said second spring are respectively located on the front and rear sides of said cylinder fixing member, the axial directions of said first spring and said second spring are the same as the axial directions of said through hole, said first spring and said left end of said second spring are respectively fixed on said cylinder fixing member, said presser head comprises a pressing block, said bottom of said needle cylinder is mounted on the left side of said cylinder fixing member, said guide pin shaft is mounted on the right side of said first connecting block, said pin shaft is mounted on the front and rear side of said connecting block is fixed on said first pin shaft, said connecting block is fixed on the front and rear side of said connecting block, said connecting block is fixed on said axial direction of said first pin shaft, the first spring and the second spring are in a compressed state, the connecting block is inclined leftwards, when the first spring and the second spring are stretched, the connecting block is perpendicular to the first supporting bar, and the bottom of the pressing block is positioned on a horizontal plane; the n second material pressing head assemblies are in one-to-one correspondence with the n first material pressing head assemblies, and the corresponding second material pressing head assemblies and first material pressing head assemblies are arranged in bilateral symmetry.

3. The high-speed stable imaging moving mechanism of the large-size lead frame linear array camera according to claim 2, wherein n first material limiting heads are arranged on the first supporting bar at intervals, the n first material limiting heads are arranged in a staggered mode with n first material pressing head assemblies, the right end face of each first material limiting head is an inclined face, the inclined face inclines upwards from right to left and forms an included angle of 45 degrees with a horizontal plane, n second material limiting heads are arranged on the second supporting bar at intervals, the n second material limiting heads are arranged in a staggered mode with the n second material pressing head assemblies, the n second material limiting heads are in one-to-one correspondence with the n first material limiting heads, and the corresponding one second material limiting head and one first material limiting head are arranged in bilateral symmetry.

4. The high-speed stable imaging moving mechanism of large-size lead frame linear camera according to claim 1, wherein the driving assembly comprises a motor, two ball screws, four synchronous pulleys, two synchronous belts and four width adjusting blocks, wherein the two ball screws are respectively called a first ball screw and a second ball screw, the four synchronous pulleys are respectively called a first synchronous pulley, a second synchronous pulley, a third synchronous pulley and a fourth synchronous pulley, the two synchronous belts are respectively called a first synchronous belt and a second synchronous belt, the four width adjusting blocks are respectively called a first width adjusting block, a second width adjusting block, a third width adjusting block and a fourth width adjusting block, the first ball screw is mounted on the main supporting plate and positioned in front of the first linear guide rail, the second ball screw is mounted on the main supporting plate, the first linear guide rail, the second linear guide rail, the first ball screw and the second ball screw are mutually parallel, the first synchronous belt pulley is fixed at the right end of the first ball screw, the second synchronous belt pulley is fixed at the right end of the second ball screw, the third synchronous belt pulley and the fourth synchronous belt pulley are positioned between the first synchronous belt pulley and the second synchronous belt pulley, the third synchronous belt pulley is positioned at the front side of the fourth synchronous belt pulley, the first synchronous belt is wound on the first synchronous belt pulley and the third synchronous belt pulley, the second synchronous belt is wound on the second synchronous belt pulley and the fourth synchronous belt pulley, the motor is fixed at the right side of the main supporting plate, the third synchronous pulley and the fourth synchronous pulley are respectively and fixedly connected with an output shaft of the motor, the first width adjusting block is fixed at the front end of the first supporting bar, the second width adjusting block is fixed at the front end of the second supporting bar, the third width adjusting block is fixed at the rear end of the first supporting bar, the fourth width adjusting block is fixed at the rear end of the second supporting bar, the first ball screw respectively passes through the first width adjusting block and the third width adjusting block, the first width adjusting block, the third width adjusting block and the first ball screw are in threaded connection, the second ball screw respectively passes through the second width adjusting block and the fourth width adjusting block, and the second ball screw is in threaded connection.