2D and 3D visual inspection mechanism for chip DB and gold wire WB and ink-jet positioning mechanism of 2D and 3D visual inspection mechanism

Abstract

The utility model relates to the field of visual inspection, and discloses a 2D and 3D visual inspection mechanism for a chip DB and a gold thread WB and an ink jet positioning mechanism of the 2D and 3D visual inspection mechanism. The ink-jet positioning mechanism (7) comprises an ink-jet positioning frame (71) arranged at the tray conveying track (51), an ink-jet positioning plate (701) capable of blocking and positioning a tray on the tray conveying track (51) is installed on the ink-jet positioning frame (71), and the ink-jet positioning plate (701) can move up and down to the upper portion or the lower portion of the tray in the height direction of the tray conveying track (51). According to the utility model, through the arrangement of the ink-jet positioning plate, the positioning accuracy of the charging tray on the charging tray conveying track can be realized, and then the accurate ink-jet identification of defective products can be realized.

Description

Technical Field

[0001] The utility model relates to the field of vision inspection, in particular to a 2D and 3D vision inspection mechanism for chip DB and wire bond WB and its inkjet positioning mechanism. Background Technique

[0002] DB is the abbreviation of "Die Bond", which means die bonding, that is, pasting the die onto the Lead Frame, which can be understood as pasting the chip onto the PCB board or other substrates through glue. WB is the abbreviation of "Wire Bond", which means wire bonding, that is, connecting wires on the die, which can be understood as connecting the chip and the PCB through gold wires or aluminum wires by equipment. These are two processes in the front-end of semiconductor packaging and testing.

[0003] DB and WB need to be tested to determine whether the products are qualified. During the inspection process, when defects are detected, defective products need to be marked with inkjet. During the marking process, accurate positioning of the chip is required. How to ensure accurate positioning of the chip in this process is a technical problem to be solved in this field. Summary of the Utility Model

[0004] The utility model aims at the problem of how to improve the accuracy of marking defective products in the vision inspection system for chip DB and wire bond WB, and provides a 2D and 3D vision inspection mechanism for chip DB and wire bond WB and its inkjet positioning mechanism.

[0005] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] The inkjet positioning mechanism includes an inkjet positioning frame arranged at the tray conveying track. An inkjet positioning plate capable of blocking and positioning the tray on the tray conveying track is installed on the inkjet positioning frame. The inkjet positioning plate can move up and down along the height direction of the tray conveying track to the upper part or the lower part of the tray.

[0007] Preferably, the inkjet positioning frame includes a positioning frame bottom plate and a positioning plate support arranged on the positioning frame bottom plate. The positioning plate support is slidably arranged on the positioning frame bottom plate along the width direction of the tray conveying track. The inkjet positioning plate is arranged on the positioning plate support. The setting of the inkjet positioning frame can realize the adjustment of the position of the inkjet positioning plate so that it can block the tray in the center and ensure the accuracy of the positioning state and posture of the tray.

[0008] Preferably, a vertically arranged fixed plate driving cylinder is fixed on the positioning plate support, and the inkjet positioning plate is connected to the piston rod of the fixed plate driving cylinder.

[0009] Preferably, a tray support assembly is further provided on the positioning plate bracket. The tray support assembly includes tray support rods capable of supporting the bottom of the tray on the tray conveying track. The arrangement of the tray support rods can support the middle part of the tray and prevent inaccurate detection results caused by the middle part of the tray being sunken during the tray detection process.

[0010] Preferably, the length direction of the tray support rod is arranged along the length direction of the tray conveying track, and the upper end surface of the tray support rod is an arc surface. The arrangement of the arc surface of the tray support rod makes it in line contact with the tray, which can effectively prevent the tray support rod from scratching the tray.

[0011] Preferably, the inkjet positioning plate is configured as a U-shaped plate with an open upper end. The inkjet positioning plate is arranged below the tray support rod and can move upward to a position where the tray support rod is inside the inkjet positioning plate. The U-shaped inkjet positioning plate can prevent the tray support rod from interfering with its upward movement. When both are in the centered position, the tray support rod plays a role in supporting the bottom of the tray, and the inkjet positioning plate plays a role in positioning the inkjet position of the tray.

[0012] Preferably, a bracket limit plate is fixed on the bottom plate of the positioning frame. The bracket limit plate is provided with a long slot for the limit plate arranged along the width direction of the track. The positioning plate bracket is provided with a plurality of bolt holes arranged at intervals and cooperating with the long slot, and a fastening wrench for relatively fixing and limiting the positioning plate bracket and the bracket limit plate is provided at the bolt holes. By screwing the fastening wrench to loosen the bracket limit plate and the positioning plate bracket, the bracket limit plate can move relative to the positioning plate bracket to another bolt hole, and then the position adjustment and fixation of the positioning plate bracket relative to the bottom plate of the positioning frame are realized.

[0013] Preferably, positioning frame fixing plates are further provided at both ends of the bottom plate of the positioning frame. The positioning frame fixing plates are provided with vertically arranged fixing plate long slots for adjusting the installation height of the positioning frame fixing plates. The arrangement of the fixing plate long slots can realize the adjustment of the height of the entire positioning plate bracket, and then realize the adjustment of the height of the tray support rod.

[0014] A 2D and 3D vision detection system for chip DB and wire bonding WB, having the aforementioned inkjet positioning mechanism.

[0015] The utility model has adopted the above technical solutions and has remarkable technical effects:

[0016] The utility model can realize the positioning accuracy of the tray at the position of the tray conveying track through the arrangement of the inkjet positioning plate, and then realize the accurate inkjet marking of defective products. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of Embodiment 1 of the utility model.

[0018] Figure 2Yes Figure 1 Schematic diagram of the loading mechanism in the middle upper part

[0019] Figure 3 Yes Figure 2 Schematic diagram of the structure of the middle material box transport rack

[0020] Figure 4 Yes Figure 3 Partial enlarged view of

[0021] Figure 5 Yes Figure 2 Schematic diagram of the structure of the middle material box conveying mechanism

[0022] Figure 6 Yes Figure 5 Schematic diagram of the structure of the middle limit plate drive mounting rack

[0023] Figure 7 Yes Figure 5 Schematic diagram of the structure of the middle material box loading rack

[0024] Figure 8 Yes Figure 5 Schematic diagram of the structure of the middle material tray pushing mechanism

[0025] Figure 9 Yes Figure 8 Schematic diagram of the lower structure of

[0026] Figure 10 Yes Figure 1 Schematic diagram of the structure of the middle material tray detection mechanism

[0027] Figure 11 Yes Figure 10 Schematic diagram of the structure of the middle 2D camera adjustment mechanism

[0028] Figure 12 Yes Figure 10 Schematic diagram of the structure of the middle 3D camera adjustment mechanism

[0029] Figure 13 Yes Figure 10 Schematic diagram of the structure of the middle material tray conveying mechanism

[0030] Figure 14 Yes Figure 13 Partial enlarged view of the fixed conveying rack or the movable conveying rack in the middle

[0031] Figure 15 Yes Figure 14 Schematic diagram of the structure of the middle track guide plate

[0032] Figure 16 Yes Figure 10 Schematic diagram of the structure of the middle jaw drive mechanism

[0033] Figure 17 YesFigure 10 Schematic structural diagram of the inkjet positioning mechanism. Specific implementation mode

[0034] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiment 1

[0036] This embodiment provides a 2D and 3D vision detection system for chip DB and gold wire WB, as Figures 1 - 17 shown, which includes a cartridge transfer mechanism and a tray detection mechanism 3. The cartridge transfer mechanism includes a loading mechanism 11 and an unloading mechanism 12, and the tray detection mechanism 3 is arranged between the loading mechanism 11 and the unloading mechanism 12.

[0037] As Figures 1 - 9 shown, both the loading mechanism 11 and the unloading mechanism 12 include a cartridge loading and unloading rack 13 and a cartridge transport rack 14 that are spaced apart in the horizontal direction. At the cartridge loading and unloading rack 13, there are respectively a cartridge loading position 101 and a cartridge unloading position 102 that are spaced apart in the vertical direction. The cartridge loading and unloading rack 13 includes a cartridge conveying mechanism 17 arranged at the cartridge loading position 101. The cartridge conveying mechanism 17 includes a cartridge loading rack 105. The cartridge loading and unloading rack 13 also includes a cartridge unloading rack arranged below the cartridge loading rack 105. The cartridge loading position 101 and the cartridge unloading position 102 are respectively arranged at the cartridge loading rack 105 and the cartridge unloading rack. Both the cartridge loading position 101 and the cartridge unloading position 102 are provided with cartridge placement slots 112 that are open at the upper end and the end facing the cartridge transport rack 14.

[0038] On the loading mechanism 11 and the unloading mechanism 12 and between the cartridge loading and unloading rack 13 and the cartridge transport rack 14, there are respectively formed a tray placing position 15 and a tray receiving position 16; at the cartridge transport rack 14 in both the loading mechanism 11 and the unloading mechanism 12, there is provided a cartridge grasping mechanism 104. The cartridge grasping mechanism 104 can move in the vertical direction and the horizontal direction to realize transporting the cartridge at the cartridge loading position 101 to the tray receiving position 16 and transporting the cartridge at the tray placing position 15 to the cartridge unloading position 102.

[0039] In this embodiment, the cartridge transport rack 14 includes a transport horizontal rack 201 and a transport vertical rack 202. The transport vertical rack 202 can move horizontally on the transport horizontal rack 201 towards or away from the cartridge loading and unloading rack 13. The cartridge grasping mechanism 104 includes a grasping claw mounting plate 203.

[0040] Among them, in order to realize the movement of the cartridge grasping mechanism 104 in the vertical direction and the horizontal direction, a vertical rack driving mechanism and a vertical rack movement slide rail 215 are provided on the transport horizontal rack 201, and a mounting plate driving mechanism is provided on the transport vertical rack 202.

[0041] Among them, the vertical frame driving mechanism includes a vertical frame driving motor 216 and a vertical frame driving lead screw 217 connected to the motor shaft of the vertical frame driving motor 216. The bottom of the transportation vertical frame 202 is connected to the vertical frame driving lead screw 217 through a vertical frame driving nut. The vertical frame movement slide rail 215 is arranged on both sides of the vertical frame driving lead screw 217. The mounting plate driving mechanism includes a mounting plate driving motor 218 and a mounting plate driving lead screw 219 connected to the motor shaft of the mounting plate driving motor 218. The grasping claw mounting plate 203 is connected to the mounting plate driving lead screw 219 through a mounting plate driving nut.

[0042] In this embodiment, the grasping claw mounting plate 203 is provided with a movable grasping claw 204 and a fixed grasping claw 205 arranged vertically. The movable grasping claw 204 can move towards or away from the fixed grasping claw 205. The grasping claw mounting plate 203 is mounted on the transportation vertical frame 202 and can perform vertical reciprocating motion on the transportation vertical frame 202.

[0043] Among them, the movable grasping claw driving mechanism is further provided on the grasping claw mounting plate 203. The movable grasping claw driving mechanism includes a grasping claw driving cylinder 206 and a grasping claw slide rail 207 which are both vertically arranged. The end of the piston rod of the grasping claw driving cylinder 206 is mounted with a grasping claw mounting seat 208 slidably connected to the grasping claw slide rail 207. The movable grasping claw 204 is fixed on the grasping claw mounting seat 208.

[0044] The fixed grasping claw 205 includes two parallel and spaced-apart supporting blocks 212. One end of the supporting block 212 is fixed on the grasping claw mounting plate 203, and the other end extends towards the cartridge transportation rack 14. The upper end surface of the extending end of the supporting block 212 towards the cartridge transportation rack 14 is configured with an L-shaped concave surface 213 for supporting the lower end of the cartridge. A rubber pad 214 is provided at the end surface of the movable grasping claw 204 facing the fixed grasping claw 205.

[0045] During the process of grasping the cartridge by the cartridge grasping mechanism 104, first insert the lower fixed grasping claw 205 into the lower end surface of the cartridge, and then move the upper movable grasping claw 204 downward so that the rubber pad 214 presses against the upper surface of the tray. The setting of the rubber pad 214 can not only increase the buffer, reduce the wear, but also increase the friction and improve the clamping stability. After the movable grasping claw 204 is clamped, under the combined action of the vertical frame driving mechanism and the mounting plate driving mechanism, first move the entire cartridge grasping mechanism 104 upward, and then move the cartridge out of the cartridge loading position 101 and move it to the tray discharging position 15 for single-piece tray discharging.

[0046] In addition, a hydraulic buffer 209 is provided on the gripper mounting plate 203 at the end of the gripper slide rail 207. The hydraulic buffer 209 includes a buffer body 210 fixed on the gripper mounting plate 203 and a buffer piston rod 211 with one end disposed within the buffer body 210 and the other end facing the gripper mounting seat 208.

[0047] The arrangement of the buffer piston rod 211 can achieve the buffering and decelerating effect when the gripper mounting seat 208 moves on the gripper slide rail 207, and is used for limiting the position when reaching the extreme position to prevent the gripper mounting seat 208 from derailing or directly colliding with the tray rigidly when clamping the tray.

[0048] In this embodiment, the cartridge conveying mechanism 17 includes a cartridge conveying platform 106; an active cartridge limiting plate 107 and a fixed cartridge limiting plate 108 are further provided on the cartridge loading rack 105, which are perpendicular to the cartridge conveying platform 106 and the length direction is arranged along the cartridge conveying direction. The active cartridge limiting plate 107 and the fixed cartridge limiting plate 108 are arranged in parallel and can move towards or away from the fixed cartridge limiting plate 108. The active cartridge limiting plate 107, the fixed cartridge limiting plate 108 and the cartridge conveying platform 106 together form a cartridge placement groove 112. By setting the active cartridge limiting plate 107 and the fixed cartridge limiting plate 108, the adjustment of the width direction of the cartridge placement groove 112 can be realized, so that the cartridge placement groove 112 can be applicable to the conveying of cartridges with different models and widths, to ensure the running stability of the cartridge during the conveying process and the position and attitude accuracy of the cartridge when docking with the next station.

[0049] In order to realize the movement of the active cartridge limiting plate 107, a limiting plate driving mechanism for driving the active cartridge limiting plate 107 to move is installed on the cartridge loading rack 105. The limiting plate driving mechanism includes a limiting plate driving motor 109 and a limiting plate driving lead screw 110 connected to the motor shaft of the limiting plate driving motor 109. The active cartridge limiting plate 107 is connected to the limiting plate driving lead screw 110 through a lead screw nut 111.

[0050] In order to preferably install the limiting plate driving mechanism, a limiting plate driving mounting frame 113 for installing the limiting plate driving mechanism is installed on the cartridge loading rack 105 in this embodiment. The limiting plate driving mounting frame 113 includes two mounting frame support plates 114 fixed at the edge of the cartridge conveying platform 106 and arranged in parallel with each other, and a mounting frame top plate 115 arranged at the top of the two mounting frame support plates 114. The limiting plate driving mechanism is arranged on the mounting frame top plate 115.

[0051] On the mounting frame top plate 115, there are also provided limiting plate driving slide rails 116 disposed on both sides of the limiting plate driving lead screw 110. The top of the movable cartridge limiting plate 107 is connected to a limiting plate driving seat 117. The limiting plate driving lead screw 110 is connected to the middle of the limiting plate driving seat 117. Both ends of the limiting plate driving seat 117 are provided with driving seat chutes 118 that cooperate with the limiting plate driving slide rails 116 for sliding.

[0052] In this embodiment, in order to realize the automatic transportation of the cartridge on the cartridge conveying platform 106, a cartridge conveying belt 119 is provided at the cartridge conveying platform 106. The two ends of the cartridge conveying platform 106 along the conveying direction of the cartridge conveying belt 119 respectively form a cartridge inlet end 120 and a cartridge outlet end 121.

[0053] Among them, the cartridge loading rack 105 includes a loading rack bottom plate 122 and two loading rack side plates 123. The loading rack bottom plate 122 and the two loading rack side plates 123 together form a belt transmission mechanism installation groove 124. A belt transmission mechanism is installed in the belt transmission mechanism installation groove 124. The belt transmission mechanism includes a belt transmission motor 125, a plurality of spaced belt input wheels 126 connected to the output shaft of the belt transmission motor 125, and belt output wheels 127 provided corresponding to the belt input wheels 126 one by one. The cartridge conveying belt 119 is installed between the belt input and the corresponding belt output wheels 127. A belt extension groove 128 for the cartridge conveying belt 119 to extend out is provided on the cartridge conveying platform 106. The upper end surface of the cartridge conveying belt 119 is higher than the upper end surface of the cartridge conveying platform 106.

[0054] And in order to ensure that the cartridge is in a static state when being grabbed, at least one cartridge blocking plate 129 is provided on the loading rack bottom plate 122 and at the cartridge outlet end 121. The cartridge blocking plate 129 is disposed between adjacent belt input wheels 126, so that the cartridge blocking plate 129 can intercept the cartridge to be detected. In this state, the cartridge needs to be detected. Therefore, a cartridge code reader 4 capable of scanning the cartridge on the cartridge conveying platform 106 is provided on the loading rack side plate 123. The cartridge is detected by the cartridge code reader 4. The cartridge with OK code scanning flows to the next station, that is, the tray feeding station, through the cartridge grabbing mechanism 104; the cartridge with NG code scanning is sent to the cartridge discharging rack by the cartridge grabbing mechanism 104 for discharging and manual processing. Therefore, setting the cartridge blocking plate 129 to intercept the cartridge to be detected can not only facilitate the stable code scanning detection of the cartridge by the cartridge code reader 4, but also facilitate the grabbing of the detected cartridge by the cartridge grabbing mechanism 104.

[0055] In order to facilitate the box reader 4 to better scan the boxes, a mechanism for adjusting the box reader 4 is also provided. Specifically, a reader mounting bracket 401 is installed on the side plate 123 of the loading rack. The reader mounting bracket 401 includes a vertical long strip 402 fixed on the side plate 123 of the loading rack and a horizontal long strip 403 installed on the vertical long strip 402. A vertical long slot 404 and a horizontal long slot 405 are respectively provided on the vertical long strip 402 and the horizontal long strip 403. One end of the horizontal long strip 403 is connected in the vertical long slot 404 through a fastening nut, and the box reader 4 is installed in the horizontal long slot 405 through a fastening nut. Through the settings of the vertical long slot 404 and the horizontal long slot 405, the position of the box reader 4 in the horizontal and vertical directions can be adjusted, so that the box reader 4 can better scan the boxes.

[0056] Among them, at the box loading and unloading rack 13, a first tray pushing mechanism 6 is provided for pushing the single piece of the tray to be detected in the box at the tray loading position 15 onto the tray conveying track 51. At the tray conveying mechanism 5, a second tray pushing mechanism is provided for pushing the tray after detection on the tray conveying track 51 into the box at the tray receiving position 16.

[0057] In this embodiment, the first tray pushing mechanism 6 includes a fork mounting seat 601. A tray pushing fork 602 is installed at the fork mounting seat 601. One end of the tray pushing fork 602 forms a fork extending end 603 that can extend into the box to push out the single-piece tray in the box, and the other end forms a fork mounting end 604. A fork buffer assembly is also installed on the fork mounting seat 601. The fork buffer assembly includes a fork slide rail 605 whose length direction is set along the tray pushing direction and a fork slider 606 that can slide along the fork slide rail 605. The tray pushing fork 602 is installed on the fork slider 606. It also includes a buffer spring 607 whose length direction is set along the length direction of the fork slide rail 605. The end of the buffer spring 607 can abut against the fork slider 606 to buffer the movement of the tray pushing fork 602. The setting of the buffer spring 607 can make the tray pushing fork 602 have a certain buffering effect when extending into the box to push the tray. Since the tray is very thin, if it is directly pushed in a rigid manner, it is easy to cause the deformation of the tray, which will in turn affect the subsequent detection effect. By using the buffering method of combining the spring and the slider for flexible pushing, it can effectively avoid damaging the tray when pushing out the tray.

[0058] In order to facilitate the installation of the buffer spring 607 and further guide the fork slider 606, the fork buffer assembly further includes a guide post 608 with one end fixed on the fork mounting seat 601 and the other end inserted into the fork slider 606. A sliding hole 609 is provided on the end face of the fork slider 606 away from the fork extending end 603. The guide post 608 is slidably connected in the sliding hole 609, and the buffer spring 607 is sleeved on the guide post 608.

[0059] The tray pushing fork 602 is in the shape of a U-shaped plate, and the open end of the U-shaped is the fork extending end 603. The tray pushing fork 602 with this structure can not only push the tray in a wider tray box by inserting both side arms of the U-shaped plate into the tray box, but also push the tray in a smaller tray box by inserting a single side arm of the U-shaped plate into the tray box.

[0060] In order to make the tray pushing fork 602 better cooperate with the tray box at the tray placing position 15, a position adjusting mechanism for the tray pushing fork 602 in the horizontal direction is also provided, which specifically includes a first linear module 610 and a second linear module 611 for driving the fork mounting seat 601 to move. The fork mounting seat 601 is installed on the second linear module 611, and the second linear module 611 is installed on the first linear module 610. The first linear module 610 can drive the second linear module 611 to move in the horizontal plane along a direction perpendicular to the tray pushing direction, and the second linear module 611 can drive the fork mounting seat 601 to move in the horizontal plane along the tray pushing direction.

[0061] Among them, the first linear module 610 includes a slide cylinder 612 and a linear module mounting plate 613 installed on the slide cylinder 612. The second linear module 611 includes a mounting seat driving plate 614 fixed on the linear module mounting plate 613. The bottom of the mounting seat driving plate 614 is configured as a mounting seat slide rail 615, and the fork mounting seat 601 is slidably connected to the mounting seat slide rail 615.

[0062] A mounting seat conveyor belt 616 with a transmission direction along the length direction of the mounting seat slide rail 615, a mounting seat driving wheel 617 and a mounting seat driving motor 618 for driving the mounting seat conveyor belt 616 to move are installed on the mounting seat driving plate 614. An output belt connecting member 619 connected to the mounting seat conveyor belt 616 is provided on the fork mounting seat 601. Under the action of the output belt connecting member 619, the fork mounting seat 601 moves along with the mounting seat conveyor belt 616, realizing the movement of the fork mounting seat 601 in the horizontal plane along the tray pushing direction.

[0063] As Figures 10 - 17 shown, in this embodiment, the tray detection mechanism 3 includes a vision detection station 31 and a tray conveying station 32.

[0064] Among them, along the conveying direction of the tray conveying track 51 at the visual inspection station 31, a 2D visual inspection camera 33 and a 3D visual inspection camera 34 are sequentially arranged. There are also two tray suction plates 8 that can move up and down and are used to adsorb the trays on the tray conveying track 51. Both of the two tray suction plates 8 are arranged below the tray conveying track 51 and are respectively arranged corresponding to the 2D visual inspection camera 33 and the 3D visual inspection camera 34. The tray suction plate 8 corresponding to the 2D visual inspection camera 33 is made of a transparent material and a backlight is provided below it. There is also an ink dotting machine 35 that is arranged at the 3D visual inspection camera 34 and is located on the 3D camera linear motor module 304 and is used to dot-ink mark defective products.

[0065] A backlight is arranged at the lower part of the tray suction plate 8, so that the backlight shines from below the product, which can make the 2D visual inspection camera 33 take clearer pictures and the results more accurate. The backlight has a good detection effect on hollow materials, and can make the hollow edges clearer. In addition, a ring light source is also arranged below the 2D visual inspection camera 33, which can effectively eliminate the shadow generated by the backlight installation connecting piece.

[0066] At the visual inspection station 31, there are also a 2D camera adjustment mechanism 301 and a 3D camera adjustment mechanism 302 respectively used to adjust the positions of the 2D visual inspection camera 33 and the 2D visual inspection camera 33. The 2D camera adjustment mechanism 301 and the 3D camera adjustment mechanism 302 include a 2D camera linear motor module 303 and a 3D camera linear motor module 304 that can respectively realize the movement of the 2D visual inspection camera 33 and the 3D visual inspection camera 34 in the length and width directions of the tray conveying track 51 in the horizontal plane.

[0067] At the tray conveying station 32, there is a tray conveying mechanism 5. The tray conveying mechanism 5 includes a tray conveying track 51, and a tray loading position 15 and a tray unloading position 16 are respectively located at the inlet and outlet ends of the tray conveying track 51.

[0068] Among them, the tray conveying mechanism 5 includes a fixed conveying frame 501 and a movable conveying frame 502 that can move towards or away from the fixed conveying frame 501. In order to realize the movement of the movable conveying frame 502, there is also a conveying frame driving mechanism. The conveying frame driving mechanism includes a conveying frame driving motor 516, a conveying frame driving lead screw 517 connected to the conveying frame driving motor 516, and a driving frame 518 connected to the conveying frame driving lead screw 517. The driving frame 518 is fixed on the movable conveying frame 502.

[0069] To further ensure the movement stability of the movable conveying rack 502, the movable conveying rack 502 further includes two movable support plates 519 provided at both ends of the movable track plate 504 for supporting the movable track plate 504. The conveying rack driving mechanism further includes a support plate track 520 provided under the movable support plate 519 for the movable support plate 519 to slide and a driving rack track 521 provided under the driving rack 518 for the driving rack 518 to slide.

[0070] The fixed conveying rack 501 and the movable conveying rack 502 respectively include a fixed track plate 503 and a movable track plate 504. The fixed track plate 503 and the movable track plate 504 are arranged in parallel, and the upper ends of the opposite side surfaces are both constructed with a tray edge support platform 505. The tray edge support platform 505 on the fixed track plate 503 and the tray edge support platform 505 on the movable track plate 504 together constitute a tray conveying track 51.

[0071] Track guiding plates 506 are provided at both the inlet and outlet ends of the tray conveying track 51 on the fixed track plate 503 and the movable track plate 504. The side surface of the track guiding plate 506 is constructed with a tray edge upper limit platform 507 provided above the tray edge support platform 505. The lower end surfaces of the tray edge support platform 505 and the tray edge upper limit platform 507 together constitute a tray edge guiding groove 508; the lower end surface of the tray edge upper limit platform 507 includes a horizontal limit surface 509 parallel to the tray edge support platform 505 and an inclined guiding surface 510 provided at the starting end of the horizontal limit surface 509.

[0072] Under the action of the track guiding plate 506, the pushed tray can be accurately guided onto the tray edge support platform 505, and under the combined action of the track guiding plate 506 and the tray suction plate 8, it can be ensured that the tray is completely fixed and flat without deformation during the detection process, ensuring the accuracy of the detection result.

[0073] The tray conveying mechanism 5 further includes a plurality of movable grippers 52 that can move along the length direction of the tray conveying track 51 for clamping the edge part of the tray. The movable gripper 52 includes two clamping plates 511 that can move relative to each other. The movable gripper 52 near the tray receiving position 16 constitutes a second tray pushing mechanism.

[0074] The movable gripper 52 clamps and transports the tray to different detection stations on the tray conveying track 51. After the detection is completed, the movable gripper 52 pushes the detected products one by one into an empty tray. After the tray is full, it is transported by the tray gripping mechanism 104 in the tray transport rack 14 of the blanking mechanism 12 to the blanking mechanism 12 for further transportation to subsequent stations.

[0075] In this embodiment, the movable gripper 52 is arranged on the side of the fixed conveyor frame 501, and further includes a gripper driving mechanism. The gripper driving mechanism includes a gripper linear motor module 512 whose length direction is arranged along the length direction of the tray conveying track 51. A gripper mounting seat 513 is installed on the gripper linear motor module 512. Two oppositely arranged clamping plate mounting arms 514 and a mounting arm driving cylinder 515 capable of driving the clamping plate mounting arms 514 to move along the width direction of the tray conveying track 51 are provided on the gripper mounting seat 513. Two clamping plates 511 are respectively installed on the two clamping plate mounting arms 514, and the two clamping plate mounting arms 514 can move towards or away from each other. The specific movement driving method can adopt a conventional two-way motor or two-way cylinder drive.

[0076] When detecting a defect, an inkjet mark needs to be made on the defective product. Since the chip is small, the positioning requirement is precise, and the material is very thin, when the gripper drags the material over, there may be relative sliding between the gripper and the material. Relying solely on the walking distance of the movable gripper 52 along the X-axis for positioning is inaccurate. Therefore, an inkjet positioning mechanism 7 is designed.

[0077] In this embodiment, an inkjet positioning mechanism 7 is provided at the tray conveying track 51 and is located below the dotting machine 35. The inkjet positioning mechanism 7 includes an inkjet positioning frame 71. An inkjet positioning plate 701 capable of blocking and positioning the tray on the tray conveying track 51 is installed on the inkjet positioning frame 71. The inkjet positioning plate 701 can move up and down along the height direction of the tray conveying track 51 to the upper part or the lower part of the tray; the inkjet positioning frame 71 includes a positioning frame bottom plate 702 and a positioning plate support 703 arranged on the positioning frame bottom plate 702. The positioning plate support 703 is slidably arranged on the positioning frame bottom plate 702 along the width direction of the tray conveying track 51. The inkjet positioning plate 701 is arranged on the positioning plate support 703. A vertically arranged fixed plate driving cylinder 704 is fixed on the positioning plate support 703, and the inkjet positioning plate 701 is connected to the piston rod of the fixed plate driving cylinder 704.

[0078] A tray support assembly is further provided on the positioning plate support 703. The tray support assembly includes a tray support rod 522 capable of supporting the bottom of the tray on the tray conveying track 51; the length direction of the tray support rod 522 is arranged along the length direction of the tray conveying track 51, and the upper end surface of the tray support rod 522 is an arc surface.

[0079] The inkjet positioning plate 701 is configured as a U-shaped plate with an open upper end. The inkjet positioning plate 701 is arranged below the tray support rod 522 and can move upward to a position where the tray support rod 522 is inside the inkjet positioning plate 701. The U-shaped plate configuration of the inkjet positioning plate 701 can prevent the tray support rod 522 from blocking the inkjet positioning plate 701 when the inkjet positioning plate 701 moves upward.

[0080] A support limiting plate 705 is fixed on the base plate 702 of the positioning frame. A long slot 706 of the limiting plate is arranged on the support limiting plate 705 along the width direction of the track. A plurality of bolt holes 707 arranged at intervals and matching with the long slot are arranged on the positioning plate support 703. A fastening wrench 708 for relatively fixing and limiting the positioning plate support 703 and the support limiting plate 705 is arranged at the bolt holes 707.

[0081] Positioning frame fixing plates 709 are further arranged at both ends of the base plate 702 of the positioning frame. A long slot 710 of the fixing plate for adjusting the installation height of the positioning frame fixing plate 709 is arranged vertically on the positioning frame fixing plate 709.

[0082] During the working process of the inkjet positioning mechanism 7, after adjusting the width of the tray conveying track 51, by loosening the fastening wrench 708, the entire positioning plate support 703 moves relative to the base plate 702 of the positioning frame to the middle position of the tray conveying track 51. At this time, the inkjet positioning plate 701 and the tray support rod 522 are arranged in the middle of the tray conveying track 51. Since the tray is relatively thin and has a certain flexibility, the tray support rod 522 supports the middle part of the tray, which can avoid the middle part of the tray from being concave and deformed during the tray detection process. The upper surface of the tray support rod 522 is configured as an arc surface, which can make the tray support rod 522 and the lower surface of the tray be in line contact, reducing the risk of potential scratching of the product.

[0083] When the product detection is completed and defective products are found, the inkjet positioning plate 701 is lifted. When the material moves in place, it is blocked in the middle by the inkjet positioning plate 701. A position sensor is arranged in the inkjet positioning plate 701. When the sensor in the inkjet positioning plate 701 detects in place, the flow direction is hard-limited to ensure the inkjet accuracy during this process. After the defective part is inkjet-printed, the inkjet positioning plate 701 descends, and the product is transported to the next working station.

[0084] In this embodiment, the movement process, movement position, etc. of the movement mechanism are accurately detected by the position sensor. For example, a displacement sensor is arranged in the corresponding transmission mechanism or movement mechanism, and the installation position of the displacement sensor is adjusted according to actual needs. The position detection principle is a conventional detection method.

[0085] During the working process of the entire vision detection system, first, an operator puts a full material box into the material box placement groove 112 at the material box loading position 101 of the loading mechanism 11. Under the action of the material box conveying belt 119, it is transported to the lower part of the material box barcode reader 4 for barcode scanning and detection. The material box with OK barcode flows to the tray placement station through the material box grasping mechanism 104; the material box with NG barcode is sent to the material box unloading rack by the material box grasping mechanism 104 for discharge and manual processing.

[0086] Then, the tray pushing mechanism pushes the trays in the material box at the tray placement station one by one into the tray conveying track 51, and the empty material box is discharged from the lower layer;

[0087] Next, under the action of the moving gripper 52, the to-be-detected tray loaded with materials on the tray conveying track 51 is transported to the 2D vision detection station below the 2D vision detection camera 33 for 2D detection; after the 2D detection is completed, it is transported to the 3D vision detection station below the 3D vision detection camera 34 for 3D detection;

[0088] After the vision detection is completed, if it is a NG product, it is marked with ink at the NG position by the ink dotting machine 35 and then transported to the blanking station; if it is a qualified product, it is directly transported to the blanking station.

[0089] At the blanking mechanism 12, an empty tray is manually placed at the loading position; after the empty tray passes the barcode scanning successfully, it is sent to the product receiving position. If the barcode scanning fails, it is discharged from the lower layer for manual handling;

[0090] Next, the moving gripper 52 pushes the detected products one by one into the empty tray at the product receiving position; after the empty tray at the product receiving position is full, it is placed by the tray gripping mechanism 104 at the lower layer's full tray blanking position 102, and after caching a certain number, it reminds the operator to take it out.

[0091] The whole process of this embodiment has a smooth flow and a reasonable layout among various stations, and can better realize the automatic operation in the whole detection process and automatically classify the qualified and unqualified products after detection.

[0092] It is easy to understand that those skilled in the art can combine, split, recombine, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0093] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. Inkjet positioning mechanism (7), characterized in that: The inkjet positioning frame (71) is arranged on a material tray conveying track (51), and an inkjet positioning plate (701) capable of blocking and positioning the material tray on the material tray conveying track (51) is installed on the inkjet positioning frame (71). The inkjet positioning plate (701) can move up and down along the height direction of the material tray conveying track (51) to the upper part or the lower part of the material tray.

2. The inkjet positioning mechanism according to claim 1, characterized in that: The inkjet positioning frame (71) comprises a positioning frame bottom plate (702) and a positioning plate bracket (703) arranged on the positioning frame bottom plate (702); the positioning plate bracket (703) is slidably arranged on the positioning frame bottom plate (702) along the width direction of the material tray conveying track (51); and the inkjet positioning plate (701) is arranged on the positioning plate bracket (703).

3. The inkjet positioning mechanism according to claim 2, characterized in that: A vertically arranged fixed plate driving cylinder (704) is fixed on the positioning plate bracket (703), and the inkjet positioning plate (701) is connected to the piston rod of the fixed plate driving cylinder (704).

4. The inkjet positioning mechanism according to claim 2, characterized in that: A material tray support assembly is also provided on the positioning plate bracket (703), and the material tray support assembly includes a material tray support rod (522) capable of supporting the bottom of the material tray on the material tray conveying track (51).

5. The inkjet positioning mechanism according to claim 4, characterized in that: The length direction of the tray support rod (522) is arranged along the length direction of the tray conveying track (51), and the upper end surface of the tray support rod (522) is an arc surface.

6. The inkjet positioning mechanism according to claim 4, characterized in that: The inkjet positioning plate (701) is constructed in the shape of a U-shaped plate with an open upper end. The inkjet positioning plate (701) is arranged below the material tray support rod (522) and can move upwards until the material tray support rod (522) is located inside the inkjet positioning plate (701).

7. The inkjet positioning mechanism according to claim 2, characterized in that: A bracket limiting plate (705) is fixed on the positioning frame bottom plate (702); the bracket limiting plate (705) is provided with a limiting plate long groove (706) arranged along the width direction of the track; the positioning plate bracket (703) is provided with a plurality of bolt holes (707) arranged at intervals and matched with the long groove; and a tightening wrench (708) for achieving relative fixed limiting of the positioning plate bracket (703) and the bracket limiting plate (705) is provided at the bolt hole (707).

8. The inkjet positioning mechanism according to claim 2, characterized in that: Positioning frame fixing plates (709) are also provided at both ends of the positioning frame bottom plate (702), and the positioning frame fixing plates (709) are provided with vertically arranged fixing plate long grooves (710) for adjusting the installation height of the positioning frame fixing plates (709).

9. A 2D and 3D visual inspection mechanism for chip DB and gold wire WB, characterized in that: It comprises the inkjet positioning mechanism described in any one of claims 1-8.

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