A defect detection apparatus

Abstract

The present application relates to the technical field of semiconductor detection, and particularly relates to a defect detection device, which comprises a feeding mechanism for conveying a workpiece to be detected along a first direction; a detection mechanism for detecting defects on the front and back surfaces of the passing workpiece; and a discharging mechanism for sorting and outputting the workpiece after detection along the first direction; the feeding mechanism, the detection mechanism and the discharging mechanism are arranged in sequence along a second direction, and the working transfer positions of the three are kept aligned; a transfer mechanism is arranged at the working transfer positions of the feeding mechanism, the detection mechanism and the discharging mechanism, and the conveying path of the feeding mechanism and the conveying path of the discharging mechanism both intersect with the movement track of the transfer mechanism in space, the overall space layout is optimized, the problem of large floor space of the existing detection device is effectively solved, the reasonable setting of the transfer mechanism and the intersection of the conveying paths change the traditional plane extension type layout, the moving path of the workpiece between different stations is shortened, and the coordination efficiency of the mechanism is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor detection, in particular to a defect detection equipment. BACKGROUND

[0002] In the manufacturing process of flexible lead frame, the detection of its appearance and structural defects is a key link to ensure product reliability and final packaging quality. However, the detection equipment widely used at present generally has the problems of loose overall space layout and large floor area, which is difficult to adapt to the requirements of space utilization in intensive production workshops. At the same time, such equipment mostly adopts a planar extension type of conveying and transfer layout, which leads to a long moving path of the workpiece between different stations, low coordination efficiency of the mechanism, a large amount of non-productive waiting time in the loading and unloading and positioning process, frequent start and stop of the equipment and idling, which seriously limits the improvement of the lead frame detection beat and affects the continuous operation efficiency and overall economic benefit of the production line. SUMMARY

[0003] The purpose of the present application is to provide a defect detection equipment to solve the problem that the layout of the lead frame detection equipment in the prior art is loose, the moving path is long, and the coordination efficiency is low, which seriously restricts the space utilization of the equipment.

[0004] The technical solution of the present application is: a defect detection equipment, comprising:

[0005] A loading mechanism for conveying the workpiece to be detected along a first direction;

[0006] A detection mechanism for detecting defects on the front and back surfaces of the passing workpiece;

[0007] A discharging mechanism for sorting and outputting the workpiece that has completed detection along the first direction;

[0008] The loading mechanism, the detection mechanism and the discharging mechanism are arranged in sequence along a second direction, and the working transfer positions of the three are aligned;

[0009] A transfer mechanism arranged at the working transfer positions of the loading mechanism, the detection mechanism and the discharging mechanism for transferring the workpiece in the second direction, the conveying path of the loading mechanism and the conveying path of the discharging mechanism both intersect with the movement track of the transfer mechanism in space, and the loading mechanism, the transfer mechanism and the discharging mechanism are arranged in a ring around the detection mechanism, forming a compact three-dimensional structure.

[0010] Preferably, the loading mechanism comprises a loading guide rail, the loading guide rail extends above the transfer mechanism, a first transfer assembly for transferring the workpiece is slidably connected to the loading guide rail, and the bottom of the loading guide rail is provided with a loading bin for loading the workpiece to be detected.

[0011] The unloading mechanism comprises an unloading guide rail, the feeding guide rail and the unloading guide rail are arranged on two sides of the detection mechanism, the unloading guide rail extends to above the transfer mechanism along a first direction, a third transfer assembly for transferring the workpiece is slidably connected to the unloading guide rail, and the bottom of the unloading guide rail is provided with at least a first unloading bin and a second unloading bin for storing the workpieces after detection.

[0012] Preferably, the detection mechanism comprises a front surface detection assembly for detecting the front surface of the workpiece and a back surface detection assembly for detecting the back surface of the workpiece, and the front surface detection assembly and the back surface detection assembly are distributed along a vertical direction and form a spacing.

[0013] Preferably, the feeding guide rail and the unloading guide rail are arranged on two sides of the front surface detection assembly and are located at the same height level, the feeding bin, the first unloading bin, the second unloading bin and the transfer mechanism are arranged in a surrounding manner at the same height level, and the back surface detection assembly is located at an independent height level, forming a three-layer compact space structure.

[0014] Preferably, the transfer mechanism comprises a main slide rail and a carrier table, the main slide rail extends along a second direction, and the carrier table is slidably connected to the main slide rail, and the carrier table is provided with a detection channel penetrating along a vertical direction.

[0015] Preferably, the top of the carrier table is slidably connected with a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate can move towards or away from each other along the first direction and span the detection channel, the first positioning plate is provided with a plurality of first adsorption holes at the top edge thereof facing the second positioning plate, and the second positioning plate is provided with a plurality of second adsorption holes at the top edge thereof facing the first positioning plate for adsorbing the edge of the workpiece.

[0016] Preferably, the top of the carrier table is further provided with a driving member and a forward and reverse screw rod, the forward and reverse screw rod extends along the first direction, the first positioning plate and the second positioning plate are respectively matched with screw threads of opposite rotation directions on the forward and reverse screw rod, the driving member is in transmission connection with the forward and reverse screw rod for driving the rotation thereof, so that the first positioning plate and the second positioning plate can move towards or away from each other synchronously.

[0017] Preferably, the first positioning plate is fixedly provided with a first limiting block at the top edge thereof close to the second positioning plate, and the first adsorption holes are distributed between the first limiting block and the edge of the first positioning plate.

[0018] The second positioning plate is fixed with a second limiting block near the top edge of the first positioning plate, the second adsorption holes are distributed between the second limiting block and the edge of the second positioning plate, and the top surfaces of the first limiting block and the second limiting block are both inclined to the detection channel, so as to guide the edge of the workpiece to be adsorbed and positioned by the first adsorption hole and the second adsorption hole.

[0019] Preferably, the bottom of the feeding guide rail is provided with a first separator paper bin, the first separator paper bin is located on the side of the feeding bin away from the transfer mechanism, the feeding guide rail is slidably connected with a second transfer assembly for transferring the separator paper in the feeding bin to the first separator paper bin.

[0020] Preferably, the bottom of the feeding guide rail is provided with a second separator paper bin, the second separator paper bin is located on the side of the first feeding bin and the second feeding bin away from the transfer mechanism, the feeding guide rail is slidably connected with a fourth transfer assembly for transferring the separator paper from the second separator paper bin to the first feeding bin or the second feeding bin.

[0021] Compared with the prior art, the advantages of the present application are:

[0022] The feeding mechanism, the detection mechanism and the discharging mechanism are arranged in the second direction in sequence and the working transfer positions are aligned, and the feeding mechanism, the transfer mechanism and the discharging mechanism form a compact three-dimensional surrounding layout with the detection mechanism as the center, which optimizes the overall space layout, effectively solves the problems of loose space and large floor area of the existing detection equipment, improves the space utilization rate to adapt to the intensive production workshop; the reasonable arrangement of the transfer mechanism and the intersection of the conveying paths change the traditional planar extension type layout, shorten the movement path of the workpiece between different stations, and improve the cooperation efficiency of the mechanism; at the same time, the compact layout makes the workpiece transfer more smooth, reduces the non-productive waiting time in the feeding and discharging and positioning processes, and reduces the frequent start-stop and idling of the equipment; ultimately helps to improve the workpiece detection beat, ensures the continuous operation of the production line, and improves the overall economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings and embodiments:

[0024] Figure 1 A defect detection equipment structure schematic view according to the present application;

[0025] Figure 2 A transfer mechanism structure schematic view according to the present application;

[0026] Figure 3 A positioning assembly structure schematic view according to the present application;

[0027] Figure 4 A detection mechanism structure schematic view according to the present application;

[0028] Figure 5 Structure diagram of the feeding mechanism according to the present application;

[0029] Figure 6 Structure diagram of the discharging mechanism according to the present application;

[0030] Figure 7 Structure diagram of the pneumatic feeding assembly according to the present application;

[0031] Figure 8 Structure diagram of the adjustable hopper according to the present application.

[0032] Explanation of reference signs:

[0033] 1, feeding mechanism; 11, feeding guide rail; 12, first separator paper hopper; 13, feeding hopper; 14, first transfer assembly; 15, second transfer assembly; 2, detection mechanism; 21, front detection assembly; 211, front detection frame; 212, front detection vision module; 213, first light source; 22, back detection assembly; 221, back detection frame; 222, back detection vision module; 223, second light source; 3, discharging mechanism; 31, discharging guide rail; 32, second separator paper hopper; 33, first discharging hopper; 34, second discharging hopper; 35, third transfer assembly; 36, fourth transfer assembly; 4, rack; 41, bearing platform; 42, bearing frame; 5, transfer mechanism; 51, main slide rail; 52, object bearing table; 521, detection channel; 53, auxiliary slide rail; 54, positioning assembly; 541, first positioning plate; 5411, first adsorption hole; 5412, first limiting block; 542, second positioning plate; 5421, second adsorption hole; 5422, second limiting block; 543, driving member; 544, forward and reverse toothed rod; 545, first vacuum valve; 546, second vacuum valve; 547, multi-stage vacuum generator; 6, pneumatic feeding assembly; 61, vertical guide rail; 62, bracket; 621, waist hole; 63, adsorption nozzle; 64, adjusting rod; 641, adjusting groove; 7, adjustable hopper; 71, supporting hopper plate; 72, first limiting rod; 73, second limiting rod; 74, third limiting rod; 75, bearing hopper plate. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0035] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0036] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] As shown in Figure 1 A defect detection device includes a feeding mechanism 1, a detection mechanism 2, a discharging mechanism 3, and a transfer mechanism 5. The feeding mechanism 1 is used to transport a workpiece to be detected in a first direction. The detection mechanism 2 is used to detect defects on the front and back surfaces of the passing workpiece. The discharging mechanism 3 is used to sort and output the workpiece that has completed detection in the first direction. The feeding mechanism 1, the detection mechanism 2, and the discharging mechanism 3 are arranged in sequence in a second direction, and the working interfaces of the three are aligned in the first direction. The transfer mechanism 5 is arranged at the working interfaces of the three, and is used to transfer the workpiece in the second direction. The conveying path of the feeding mechanism 1 and the conveying path of the discharging mechanism 3 both intersect with the movement track of the transfer mechanism 5 in space, forming a compact three-dimensional layout. This ensures an efficient and continuous uninterrupted detection process. At the same time, by allowing the horizontal conveying path to intersect with the movement track of the transfer mechanism 5 in space rather than being laid out in a plane, the overall floor space of the device is effectively reduced, and the space utilization is significantly improved. The production rhythm is ensured while the cost of occupying the space of the clean room or production workshop is reduced.

[0038] In the present embodiment, the defect detection device includes a rack 4, and the feeding mechanism 1, the detection mechanism 2, the discharging mechanism 3, and the transfer mechanism 5 are all fixedly arranged on the rack 4. Specifically, the rack 4 includes a bearing platform 41 and a bearing frame 42, the bearing frame 42 is fixedly arranged on the bearing platform 41, the feeding mechanism 1 and the discharging mechanism 3 are arranged on opposite sides of the bearing frame 42 along the second direction, and the detection mechanism 2 is fixedly arranged on the side of the bearing frame 42 along the first direction, so that the working interfaces of the three are aligned, i.e., the output end of the feeding mechanism 1, the detection end of the detection mechanism 2, and the input end of the discharging mechanism 3. The transfer mechanism 5 passes through the detection mechanism 2 along the second direction, and the conveying path of the feeding mechanism 1 and the conveying path of the discharging mechanism 3 both intersect with the movement track of the transfer mechanism 5 in space.

[0039] As shown in Figure 2As shown, the transfer mechanism 5 includes a main slide rail 51 and a platform 52. The main slide rail 51 is fixed to the support platform 41 along a second direction, and the platform 52 is slidably connected to the main slide rail 51. The platform 52 extends from the main slide rail 51 along a first direction and is used to support workpieces. The transfer mechanism 5 also includes a secondary slide rail 53, which is fixed to the support platform 41 along a second direction. The main slide rail 51 and the secondary slide rail 53 are parallel and spaced apart along the second direction. The platform 52 is slidably mounted on the main slide rail 51 and the secondary slide rail 53, that is, the two guide rails support its two ends, and the middle part forms a hollow structure to avoid the detection channel 521. The movement trajectory of the platform 52 intersects spatially with the working handover points of the loading mechanism 1, the detection mechanism 2, and the unloading mechanism 3.

[0040] Optionally, the stage 52 is a plate-shaped structure with a horizontal top to ensure that the workpiece being carried is in a horizontal state. The stage 52 provides a precise, stable and repeatable positioning reference surface for the workpiece, ensuring that the workpiece is in a consistent horizontal and height position after each loading, eliminating measurement errors and positioning uncertainties caused by workpiece tilt.

[0041] The stage 52 has a vertically extending detection channel 521. Preferably, the detection channel 521 has a rectangular outline, with its short side extending along a first direction and its long side extending along a second direction. The vertically extending detection channel 521 provides the detection mechanism 2 with an unobstructed and distortion-free field of view, allowing the detection mechanism 2 to directly and clearly image the top and bottom features, contours, or through holes of the workpiece from above and below.

[0042] like Figure 3 As shown, the top of the stage 52 is provided with a positioning component 54 for adsorbing and positioning workpieces. The positioning component 54 includes a first positioning plate 541 and a second positioning plate 542. The first positioning plate 541 and the second positioning plate 542 are slidably connected to the stage 52 along a first direction. The first positioning plate 541 and the second positioning plate 542 move in opposite or opposite directions to carry workpieces of different sizes, so as to accurately position the center or edge of the workpiece on the detection channel 521 for the detection mechanism 2 to detect the workpiece.

[0043] The positioning assembly 54 further comprises a driving member 543 and a reversible screw rod 544 extending along the first direction, and the first positioning plate 541 and the second positioning plate 542 are respectively matched with screw threads of opposite rotation on the reversible screw rod 544, that is, the reversible screw rod 544 controls the first positioning plate 541 and the second positioning plate 542 to move in opposite directions. Preferably, the first positioning plate 541 and the second positioning plate 542 are at the same distance from the thread joint of the reversible screw rod 544, so that the first positioning plate 541 and the second positioning plate 542 are forced to mechanically synchronize, and the two plates move the same distance, greatly improving the reliability, and the rotation of the first screw rod will always make the beam plate symmetrical about the center, and the workpiece is automatically adjusted to the center of the detection channel 521.

[0044] In the embodiment, the driving member 543 is a servo motor, and in other embodiments, the driving member 543 can be a stepper motor or a linear motor.

[0045] Preferably, the reversible screw rod 544 is provided with two groups, and the two groups are respectively arranged at positions close to the short sides of the detection channel 521 of the object table 52. The two reversible screw rods 544 are arranged in parallel along the first direction and are synchronously driven by the driving member 543 and located on the same horizontal plane. The first positioning plate 541 and the second positioning plate 542 are both threadedly connected to the two reversible screw rods 544, thereby improving the displacement accuracy of the first positioning plate 541 and the second positioning plate 542. In the embodiment, the driving member 543 drives the two screw rods to rotate synchronously through belt transmission, and in other embodiments, a gear set can be used between the driving member 543 and the screw rod.

[0046] The opposite edges of the first positioning plate 541 and the second positioning plate 542 are arranged in parallel to each other. The first positioning plate 541 is provided with a plurality of first suction holes 5411 at the top edge facing the second positioning plate 542. The second positioning plate 542 is provided with a plurality of second suction holes 5421 at the top edge facing the first positioning plate 541. Preferably, the first suction holes 5411 are arrayed in a single row along the second direction at the top edge of the first positioning plate 541, and the second suction holes 5421 are arrayed in a single row along the second direction at the top edge of the second positioning plate 542, so as to adsorb the edges of the product. More preferably, the first suction holes 5411 and the second suction holes 5421 are both arrayed in a single row.

[0047] The top of the first positioning plate 541 is fixed with a first limiting block 5412, which is located at the edge of the first positioning plate 541 close to the second positioning plate 542, and the first adsorption holes 5411 are distributed between the first limiting block 5412 and the edge of the first positioning plate 541. The second positioning plate 542 is fixed with a second limiting block 5422 close to the top edge of the first positioning plate 541, and the second adsorption holes 5421 are distributed between the second limiting block 5422 and the edge of the second positioning plate 542. The top of the first limiting block 5412 and the second limiting block 5422 are both inclined towards the detection channel 521 to guide the workpiece to be adsorbed and positioned by the first adsorption holes 5411 and the second adsorption holes 5421.

[0048] In the present embodiment, the side of the first positioning plate 541 is provided with a first vacuum valve 545 connected with the first adsorption holes 5411, and the side of the second positioning plate 542 is provided with a second vacuum valve 546 connected with the second adsorption holes 5421. The stage 52 is fixed with a multi-stage vacuum generator 547, which communicates the first vacuum valve 545 and the second vacuum valve 546 through a hose to generate adsorption force from the first adsorption holes 5411 and the second adsorption holes 5421 for adsorbing the edge of the product.

[0049] As shown in Figure 4 The detection mechanism 2 includes a front detection assembly 21 and a back detection assembly 22, which are distributed along the vertical direction and constitute a distance for the stage 52 to pass through, so as to detect the product on the stage 52 from the front and back. Specifically, the front detection assembly 21 includes a front detection frame 211 and a front detection vision module 212, the front detection frame 211 is fixed along the vertical direction on the carrier frame 42, and the front detection vision module 212 is movably connected on the front detection frame 211. Preferably, the front detection vision module 212 realizes pitch and rotation adjustment through a ball joint, and the bottom of the front detection assembly 21 is provided with a first light source 213 for light supplement of the front of the workpiece.

[0050] The back surface detection assembly 22 comprises a back surface detection frame 221 and a back surface detection vision module 222. The back surface detection frame 221 is fixedly arranged on the bottom of the bearing platform 41 in the vertical direction, and the back surface detection vision module 222 is movably connected to the back surface detection frame 221 upwardly, for visual detection of the back surface of the workpiece. Preferably, the back surface detection vision module 222 is adjusted in pitch and rotation through a ball joint, and the bottom of the back surface detection assembly 22 is provided with a second light source 223 for light supplement of the back surface of the workpiece. The first light source 213 and the second light source 223 form a distance through which the object table 52 passes. The front surface detection assembly 21 and the back surface detection assembly 22 independently detect the front surface and the back surface of the workpiece respectively, so as to find defects such as cracks, indentations, oxidation and the like. The coaxial light can better detect the defects on the surface, so as to facilitate classification of the workpiece by the unloading mechanism 3.

[0051] When the workpiece is transferred to the object table 52 by the feeding mechanism 1, the first adsorption hole 5411 and the second adsorption hole 5421 generate strong downward adsorption force to adsorb two opposite edges of the bottom of the workpiece, so as to adsorb and position the workpiece, reduce the contact with the workpiece, and ensure that the detection mechanism 2 can detect the front and back surfaces of the workpiece. The first positioning plate 541 and the second positioning plate 542 are controlled by the front and back thread rods 544 to move slightly in opposite directions, and the first positioning plate 541 and the second positioning plate 542 flatten the workpiece through opposite forces, so as to eliminate the warping of the workpiece and make the surface flat. The slight deformation, defocus or position change of the features caused by the warping of the workpiece are avoided, which are easily misjudged as “concave-convex”, “scratches” or “size defects” by the detection mechanism 2, so as to greatly reduce the false positive rate and the false negative rate.

[0052] As shown in Figure 5 The feeding mechanism 1 comprises a feeding guide rail 11, a first paper separator storage bin 12 and a feeding bin 13. The feeding guide rail 11 is fixedly arranged on the bearing frame 42 in the first direction, and extends above the transfer mechanism 5. The feeding bin 13 and the first paper separator storage bin 12 are arranged on the bearing platform 41 at the bottom of the feeding guide rail 11 in the first direction, wherein the feeding bin 13 is loaded with workpieces, and the workpieces and the paper separators are alternately stacked, and the first paper separator storage bin 12 is used to load the removed paper separators. Preferably, the feeding bin 13 is arranged close to the transfer mechanism 5, that is, the feeding bin 13 is located between the transfer mechanism 5 and the first paper separator storage bin 12, and more preferably, the feeding bin 13 is two, and the two feeding bins 13 are parallel in the first direction. The moving distance of the workpiece from the storage bin to the object table 52 is greatly shortened, which not only saves time, but also reduces the positioning error caused by long distance movement.

[0053] The upper feeding guide rail 11 is slidably connected with a first transfer assembly 14 and a second transfer assembly 15. The first transfer assembly 14 and the second transfer assembly 15 each have a translational degree of freedom in the vertical direction and a transfer end for transferring materials. The first transfer assembly 14 is used to transfer the workpieces from the upper feeding bin 13 to the worktable 52, and the second transfer assembly 15 is used to transfer the separators in the upper feeding bin 13 to the separator bin. The first transfer assembly 14 and the second transfer assembly 15 are alternately operated to complete the sequential transfer of the workpieces in the upper feeding bin 13. Through the cooperative work of the two transfer assemblies, the two actions of “taking workpieces” and “taking separators” are parallel in time, the waiting time in the feeding process is reduced, and the feeding process is seamlessly connected.

[0054] As shown in Figure 6 The lower feeding mechanism 3 includes a lower feeding guide rail 31, a second separator bin 32, a first lower feeding bin 33, and a second lower feeding bin 34. The lower feeding guide rail 31 is fixed to the side of the bearing frame 42 away from the upper feeding guide rail 11 in the first direction and extends above the transfer mechanism 5. Preferably, the distance between the lower feeding guide rail 31 and the bearing platform 41 is the same as the distance between the upper feeding guide rail 11 and the bearing platform 41. The second separator bin 32, the first lower feeding bin 33, and the second lower feeding bin 34 are arranged in a single row in the first direction. Preferably, the second separator bin 32 is arranged away from the transfer mechanism 5. Among them, the first lower feeding bin 33 is a bin for storing qualified workpieces, and the second lower feeding bin 34 is a bin for storing unqualified workpieces.

[0055] The embodiment exemplarily demonstrates an arrangement mode, which is arranged from far to close to the transfer mechanism 5 in sequence as one second separator bin 32, two second lower feeding bins 34, and two first lower feeding bins 33. In addition to the above-mentioned implementation mode, other arrangement modes can also be used, which are not listed one by one here.

[0056] The lower feeding guide rail 31 is slidably connected with a third transfer assembly 35 and a fourth transfer assembly 36. The third transfer assembly 35 is closer to the transfer mechanism 5 than the fourth transfer assembly 36. The third transfer assembly 35 is used to place the workpieces that have completed detection on the worktable 52 in the first lower feeding bin 33 or the second lower feeding bin 34 to classify the workpieces. The fourth transfer assembly 36 is used to place the separators in the second separator bin 32 in the corresponding bin to separate the workpieces.

[0057] As shown in Figure 7As shown, in this embodiment, the first transfer assembly 14, the second transfer assembly 15, the third transfer assembly 35, and the fourth transfer assembly 36 are all pneumatic feeding assemblies 6. This reduces the potential for unknown failure points introduced by using components with different structures, resulting in higher overall system stability, predictable failure modes, and easier preventative maintenance. Specifically, the pneumatic feeding assembly 6 includes a vertical guide rail 61, a support 62, and several suction nozzles 63. The vertical guide rail 61 is used to slide and connect to the loading guide rail 11 or the unloading guide rail 31. The vertical guide rail 61 extends vertically, and the support 62 slides and connects to the vertical guide rail 61 vertically. Several suction nozzles 63 are adjustablely connected to the bottom of the support 62, and the ends of the suction nozzles 63 are located on the same horizontal plane. The suction nozzles 63 adopt a vertical suction method, avoiding excessive horizontal stretching or compression of the workpiece and reducing the risk of permanent deformation of flexible materials due to external forces.

[0058] In this embodiment, the bottom of the support 62 is provided with an adjusting rod 64, which extends along a first direction. The support 62 has a waist hole 621 arranged along the first direction. The adjusting rod 64 is adjustablely connected to the waist hole 621 of the support 62 along the first direction via a knob. An adjusting groove 641 arranged along a second direction is provided on the adjusting rod 64. Several nozzles are adjustablely disposed in the adjusting groove 641 of the adjusting rod 64 via a knob. This allows the nozzles to be adjusted in position along the first and second directions to accommodate workpieces of different sizes.

[0059] like Figure 8 As shown, in this embodiment, the first paper separator bin 12 and the feeding bin 13, the second paper separator bin 32, the first feeding bin 33 and the second feeding bin 34 are all adjustable bins 7, used to adapt to workpieces or paper separators of different sizes, avoiding the need to customize special bins or replace the entire equipment due to changes in workpiece size, significantly reducing the cost and time of production line modification. Specifically, the adjustable bin 7 includes a support bin plate 71, the top of which is constructed as a horizontal plane. The top of the support bin plate 71 is provided with a first limiting rod 72, a second limiting rod 73, and several third limiting rods 74. The first limiting rod 72 is fixed to the support bin plate 71, and the second limiting rod 73 is slidably connected to the support bin plate 71 along a second direction. The second limiting rod 73 moves towards or away from the first limiting rod 72. The several third limiting rods 74 are divided into two groups, respectively disposed between the first limiting rod 72 and the second limiting rod 73. The two groups of third limiting rods 74 move in opposite or opposite directions along the first direction. The first limiting rod 72, the second limiting rod 73, and the third limiting rod 74 together form a space that restricts the workpiece or the paper separator. A support plate 75 is provided within this space. The support plate 75 is fixedly connected to the support plate 71 via pads. The support plate 75 is used to support the workpiece or the paper separator, and it is provided with multiple relief grooves to avoid interfering with the movement of the second limiting rod 73 and the third limiting rod 74.

[0060] The detection mechanism 2 constitutes the center of the device, and all other modules are arranged around the detection mechanism 2, aiming to transport, detect and classify the workpieces with high efficiency. In terms of spatial layout, a three-layer spatial structure is formed, the feeding guide rail 11, the discharging guide rail 31 and the front detection assembly 21 are located in the upper layer, the various hoppers and the transfer mechanism 5 are located in the middle layer, and the back detection assembly 22 is located in the lower layer. The overall structure makes use of the low utilization vertical space, greatly compressing the floor area of the device.

[0061] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A defect detection device, characterized in that, include: The feeding mechanism (1) is used to convey the workpiece to be inspected along the first direction; Inspection unit (2) is used to inspect the front and back of the passing workpiece for defects; The unloading mechanism (3) is used to sort and output the inspected workpieces along the first direction; The feeding mechanism (1), the detection mechanism (2) and the unloading mechanism (3) are arranged sequentially along the second direction, and the working handover positions of the three are kept aligned; The transfer mechanism (5) is located at the work junction of the loading mechanism (1), the detection mechanism (2) and the unloading mechanism (3) and is used to transfer the workpiece in the second direction. The conveying path of the loading mechanism (1) and the conveying path of the unloading mechanism (3) intersect with the movement trajectory of the transfer mechanism (5) in space. The loading mechanism (1), the transfer mechanism (5) and the unloading mechanism (3) are arranged in a ring around the detection mechanism (2) to form a compact three-dimensional structure. The transfer mechanism (5) includes a main slide rail (51) and a platform (52). The main slide rail (51) extends along a second direction, and the platform (52) is slidably connected to the main slide rail (51). The platform (52) has a detection channel (521) that runs through the vertical direction. The top of the stage (52) is slidably connected to a first positioning plate (541) and a second positioning plate (542). The first positioning plate (541) and the second positioning plate (542) can move towards or away from each other in a first direction and cross the detection channel (521). The first positioning plate (541) has a plurality of first adsorption holes (5411) on its top edge toward the second positioning plate (542), and the second positioning plate (542) has a plurality of second adsorption holes (5421) on its top edge toward the first positioning plate (541) for adsorbing the edge of the workpiece. The top of the platform (52) is also provided with a drive unit (543) and a forward and reverse threaded rod (544). The forward and reverse threaded rod (544) extends along a first direction. The first positioning plate (541) and the second positioning plate (542) respectively cooperate with the threaded sections with opposite directions of rotation on the forward and reverse threaded rod (544). The drive unit (543) is connected to the forward and reverse threaded rod (544) for driving its rotation so that the first positioning plate (541) and the second positioning plate (542) can move synchronously towards or away from each other.

2. The defect detection device according to claim 1, characterized in that: The feeding mechanism (1) includes a feeding guide rail (11), which extends above the transfer mechanism (5). The feeding guide rail (11) is slidably connected to a first transfer component (14) for transferring workpieces. The bottom of the feeding guide rail (11) is provided with a feeding bin (13) for loading the workpiece to be tested. The unloading mechanism (3) includes an unloading guide rail (31), the loading guide rail (11) and the unloading guide rail (31) are respectively disposed on both sides of the detection mechanism (2), the unloading guide rail (31) extends along the first direction to the top of the transfer mechanism (5), the unloading guide rail (31) is slidably connected to a third transfer component (35) for transferring workpieces, and the bottom of the unloading guide rail (31) is provided with at least a first unloading bin (33) and a second unloading bin (34) for storing the completed detection workpieces, the first unloading bin (33) and the second unloading bin (34) are distributed along the first direction.

3. The defect detection device according to claim 2, characterized in that: The detection mechanism (2) includes a front detection component (21) for detecting the front of the workpiece and a back detection component (22) for detecting the back of the workpiece. The front detection component (21) and the back detection component (22) are distributed in the vertical direction and form a gap.

4. The defect detection device according to claim 3, characterized in that: The loading guide rail (11) and unloading guide rail (31) are respectively located on both sides of the front detection component (21) and the three are located at the same height level. The loading bin (13), the first unloading bin (33), the second unloading bin (34) and the transfer mechanism (5) are arranged in a ring at the same height level. The reverse detection component (22) is located at an independent height level, forming a three-layer compact spatial structure.

5. The defect detection device according to claim 1, characterized in that: A first limiting block (5412) is fixedly provided on the top edge of the first positioning plate (541) near the second positioning plate (542), and the first suction hole (5411) is distributed between the first limiting block (5412) and the edge of the first positioning plate (541). The second positioning plate (542) is fixed with a second limiting block (5422) near the top edge of the first positioning plate (541). The second adsorption hole (5421) is distributed between the second limiting block (5422) and the edge of the second positioning plate (542). The top surfaces of the first limiting block (5412) and the second limiting block (5422) are both inclined toward the detection channel (521) to guide the edge of the workpiece to be adsorbed and positioned by the first adsorption hole (5411) and the second adsorption hole (5421).

6. A defect detection device according to claim 2, characterized in that: The bottom of the feeding guide rail (11) is provided with a first paper separator bin (12). The first paper separator bin (12) is located on the side of the feeding bin (13) away from the transfer mechanism (5). The feeding guide rail (11) is slidably connected to a second transfer component (15) for transferring the paper separator of the feeding bin (13) to the first paper separator bin (12).

7. A defect detection device according to claim 6, characterized in that: The bottom of the feeding guide rail (31) is provided with a second paper separator hopper (32). The second paper separator hopper (32) is located on the side away from the transfer mechanism (5) of the first feeding hopper (33) and the second feeding hopper (34). The feeding guide rail (31) is slidably connected to a fourth transfer component (36) for transferring the paper separator from the second paper separator hopper (32) to the first feeding hopper (33) or the second feeding hopper (34).

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