Lead frame marking online visual detection mechanism and detection method

Abstract

The application discloses a kind of lead frame marking online visual detection mechanism and detection method, detection mechanism includes: track transmission component, X-axis moving component, Y-axis moving component, visual detection component and control system.Through the automatic control of control system to the movement of track transmission component, X-axis moving component, Y-axis moving component, including control track transmission component is transferred to the frame to be detected and is blocked, control X-axis moving component, Y-axis moving component moves in horizontal and vertical direction, focus lens of Y-axis moving component is focused to visual detection component and the position of light source is fine-tuned in the moving process, simultaneously, the application also provides a kind of detection method, compared with traditional detection method, using the method avoids manual adjustment focal length, realizes high safety automation, to improve detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, specifically to an online visual inspection mechanism and method for marking lead frames. Background Technology

[0002] With advancements in industrial camera technology and rapid development in industrial automation, the transformation of traditional manufacturing industries has been continuously driven by new momentum, new ideas, and new technologies. Modern production processes place extremely stringent requirements on lead frame marking, as the quality of the marking directly impacts product sales. Therefore, after lead frame marking is completed, a visual inspection process is essential to verify its accuracy. However, current visual inspection focusing technology requires manual rotation of knobs, which cannot achieve full automation. Furthermore, the position of the visual inspection device is difficult to adjust as needed.

[0003] Therefore, it is necessary to provide an autofocus visual inspection device to solve the problem of inconvenient focusing and position adjustment of the inspection device. Summary of the Invention

[0004] This invention provides an online visual inspection mechanism and method for marking lead frames, aiming to solve the aforementioned problems existing in the background art.

[0005] The technical solution provided by this invention is as follows:

[0006] An online visual inspection system for leader frame marking includes:

[0007] Track transmission components, X-axis movement components, Y-axis movement components, vision inspection components, and control systems;

[0008] The track transmission component, the X-axis moving component, and the Y-axis moving component are all mounted on a fixed plate. The X-axis moving component and the track transmission component are arranged parallel to each other on both sides of the fixed plate. The Y-axis moving component is connected to the X-axis moving component. The vision detection component is mounted on the side of the Y-axis moving component, and the detection end of the vision detection component is mounted above the track transmission component.

[0009] The track transmission component is used to transmit the frame to be inspected. After transmitting the frame to be inspected to the detection position along the first direction, it sends an electrical signal to the control system. The control system controls the X-axis movement component and the Y-axis movement component to move along a direction parallel to the first direction. The control system also controls the Y-axis movement component and the vision detection component to move along a second direction. The vision detection component performs automatic detection while moving along the second direction.

[0010] The frame to be tested is an integrated circuit lead frame that has been marked by a marking machine.

[0011] Furthermore, the track transmission assembly includes a front track and a rear track arranged parallel to each other on the fixed plate along a first direction. A circular belt is arranged opposite to the inner side of the front track and the rear track. The circular belt is driven by a motor, and the frame to be tested is transmitted to the testing position through the circular belt.

[0012] A blocking block and a sensor are provided at one end of the front track or the rear track. The blocking block is used to block the frame to be tested, which is placed on the circular belt, to the detection position. The sensor is used to detect whether the frame to be tested has reached the detection position and send an electrical signal to the control system.

[0013] Furthermore, the X-axis moving assembly includes an electric module, a cable chain, an electric module mounting plate, and a support base arranged along the first direction;

[0014] The electric module is mounted on the support base via the electric module mounting plate; the cable chain is mounted on the side of the electric module mounting plate via the cable chain support plate and the cable chain connecting seat.

[0015] Furthermore, the Y-axis moving assembly includes a lead screw slide, a lead screw slide fixing plate, a fourth fixing seat, and a connecting rib;

[0016] The lower end of the lead screw slide is connected to the lead screw slide fixing plate, and the upper end is connected to the side end of the fourth fixing seat. The connecting rib is provided at the connection between the lead screw slide and the fourth fixing seat.

[0017] The fourth fixing seat is connected to the cable chain connecting seat.

[0018] Furthermore, the visual inspection component includes an industrial camera, a fixed-focus lens, a light source, a light source connection plate, a light source position adjustment block, and a camera mounting base;

[0019] The industrial camera is connected to the camera mount. The industrial camera is matched with the fixed-focus lens and connected sequentially from top to bottom. The camera mount is set on the lead screw slide. The light source and the light source connecting plate are both set below the fixed-focus lens. The light source connecting plate is set on the upper surface of the light source. The light source connecting plate is connected to the lead screw slide mounting plate through the light source position adjustment block.

[0020] The light source is positioned directly above the front track and the rear track.

[0021] Furthermore, the light source connecting plate is provided with a light-transmitting hole, the light source connecting plate and the light source are arranged in a horizontal direction, and the central axis of the industrial camera and the fixed-focus lens coincides with the central axis of the light-transmitting hole.

[0022] Furthermore, the track transmission assembly also includes a first fixed seat, a coupling, a drive shaft, a second fixed seat, a bearing, a round belt conveyor pulley, a round belt pulley, a cylinder, a third fixed seat, a first mounting seat, and a second mounting seat;

[0023] The motor is fixed to the fixed plate by the first fixed seat. The output end of the motor is connected to one end of the transmission shaft by the coupling. The other end of the transmission shaft passes through the front track and the end of the rear track away from the blocking block in sequence. The two ends of the transmission shaft are provided with second fixed seats.

[0024] The inner ends of the front track and the rear track are respectively provided with the circular belt conveyor wheel and the circular belt pulley, the circular belt is sleeved on the circular belt conveyor wheel and the circular belt pulley, and the drive shaft passes through the circular belt conveyor wheel;

[0025] The cylinder is fixed to the outside of the front rail or the rear rail near the blocking block by the third fixing seat. The cylinder output end is connected to one end of the first mounting seat, and the other end of the first mounting seat extends between the front rail and the rear rail and is connected to the blocking block.

[0026] The sensor is mounted on the inside of the front or rear track via the second mounting base, and the top of the sensor is lower than the upper surface of the circular belt.

[0027] Furthermore, the electric module is an embedded electric module;

[0028] The lead screw slide is a miniature trapezoidal lead screw slide.

[0029] The control system is a PLC control system.

[0030] Meanwhile, the present invention also provides an online visual inspection method for lead frame marking, which utilizes the aforementioned online visual inspection mechanism for lead frame marking and includes the following steps:

[0031] The control track transmission component transmits the frame to be tested along a first direction, and transmits the frame to be tested to the detection position;

[0032] The X-axis moving component is controlled to drive the Y-axis moving component to move along a direction parallel to the first direction. At the same time, the Y-axis moving component is controlled to drive the visual inspection component to move along the second direction. The visual inspection component is controlled to move along the second direction while the frame to be inspected is inspected.

[0033] After the frame to be tested is detected, the track transmission component is controlled to transport it to the unloading and receiving position.

[0034] Furthermore, the first direction is a horizontal direction, and the second direction is a vertical direction;

[0035] The focal length of the vision detection component is automatically adjusted by the Y-axis movement component.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. This invention provides an online visual inspection mechanism for marking lead frames, comprising: a track transmission component, an X-axis movement component, a Y-axis movement component, a visual inspection component, and a control system. During inspection using this structure, the focal length of the fixed-focus lens in the visual inspection component is automatically adjusted by the control system through the movement of the Y-axis movement component. Compared to traditional inspection devices, this avoids manual focal length adjustment, achieving full automation and thus improving inspection efficiency.

[0038] 2. This invention provides an online visual inspection mechanism for marking lead frame, which uses a miniature trapezoidal screw slide of model FSL30-L04-50-BC-B28. During operation, the light source position adjustment block is connected to the fixing plate of the miniature trapezoidal screw slide. The light source position adjustment block can achieve fine adjustment of the light source position through the waist-shaped hole of the fixing plate of the miniature trapezoidal screw slide to achieve the best lighting effect.

[0039] 3. This invention provides an online visual inspection mechanism for marking lead frame frames. Blocks are installed on the front and rear tracks. The positions of the block blocks are adjusted by cylinders. When the cylinder receives a signal from the control system, its output drives the first mounting base to descend, and the block connected to the first mounting base blocks the frame to be inspected. When the cylinder receives a signal indicating the end of inspection, its output drives the first mounting base to rise. When the height of the block connected to the first mounting base exceeds that of the frame to be inspected, a circular belt conveys the frame to be inspected to the unloading and receiving position, completing the inspection. By using cylinders and block blocks, automatic blocking is achieved, resulting in a high degree of automation.

[0040] 4. This invention provides an online visual inspection method for marking lead frames. This method uses a PLC control system to automatically control the movement of the track transmission component, the X-axis movement component, and the Y-axis movement component. The track transmission component is controlled to transmit and block the frame to be inspected, while the X-axis and Y-axis movement components are controlled to move horizontally and vertically. During the movement, the Y-axis movement component is controlled to focus the fixed-focus lens and fine-tune the position of the light source. Compared with traditional inspection methods, this method avoids manual focus adjustment, achieves a high degree of automation, and thus improves inspection efficiency. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the online visual inspection mechanism for marking lead frame in an embodiment of the present invention. Figure 1 ;

[0042] Figure 2 This is a schematic diagram of the online visual inspection mechanism for marking lead frame in an embodiment of the present invention. Figure 2 ;

[0043] Figure 3 This is a schematic diagram of the online visual inspection mechanism for marking lead frame in an embodiment of the present invention. Figure 3 ;

[0044] Figure 4 This is a schematic diagram of the online visual inspection mechanism for marking lead frame in an embodiment of the present invention. Figure 4 ;

[0045] Figure 5 This is a schematic diagram of the online visual inspection mechanism for marking lead frame in an embodiment of the present invention. Figure 5 ;

[0046] Figure 6 This is a schematic diagram of the track transmission component structure in an embodiment of the present invention;

[0047] Figure 7 A schematic diagram of the X-axis moving component structure in an embodiment of the present invention;

[0048] Figure 8 A schematic diagram of the Y-axis moving component structure in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the visual detection component structure in an embodiment of the invention.

[0050] The attached figures are labeled as follows:

[0051] 1-Rear rail, 2-Front rail, 3-First fixed seat, 4-Drive shaft, 5-Coupling, 6-Motor, 7-Shaft collar, 8-Sheath, 9-Second fixed seat, 10-Cylinder, 11-Third fixed seat, 12-Blocking block, 13-First mounting seat, 14-Bearing, 15-Round pulley, 16-Round belt, 17-Second mounting seat, 18-Sensor, 19-Round belt conveyor wheel, 20-Fixing plate, 21-Frame to be tested, 22-Electric module, 23-Drag chain, 24-Support seat, 25-Padded block, 26-Electric module mounting plate, 27-Drag chain support plate, 28-Drag chain connecting seat, 29-Screw slide, 30-Screw slide fixing plate, 31-Fourth fixed seat, 32-Connecting rib, 33-Industrial camera, 34-Fixed focus lens, 35-Camera mounting seat, 36-Light source connecting plate, 37-Light source position adjusting block, 38-Light source. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the detailed description of the embodiments of this application provided below with reference to the accompanying drawings is intended merely to illustrate selected embodiments of this application and is not intended to limit the scope of protection claimed by this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0054] It should be understood that in the description of embodiments of the present invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features.

[0055] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0056] See Figures 1-5 The present invention provides an online visual inspection mechanism for marking lead frame, comprising: a track transmission component, an X-axis movement component, a Y-axis movement component, a visual inspection component, and a control system.

[0057] The track transmission component, the X-axis moving component, and the Y-axis moving component are all mounted on the fixed plate 20. The X-axis moving component and the track transmission component are mounted parallel to each other on both sides of the fixed plate 20. The Y-axis moving component is connected to the X-axis moving component. The vision inspection component is mounted on the side of the Y-axis moving component, and the inspection end of the vision inspection component is mounted above the track transmission component, so as to perform visual inspection on the frame 21 to be inspected that is transported by the track transmission component.

[0058] The track transmission component is used to transport the frame 21 to be inspected. After transporting the frame 21 to the inspection position along the first direction, it sends an electrical signal to the control system. The control system controls the X-axis movement component and the Y-axis movement component to move parallel to the first direction. The control system also controls the Y-axis movement component and the vision inspection component to move along the second direction. The vision inspection component performs automatic inspection while moving along the second direction. During the inspection process, the focal length of the vision inspection component is automatically adjusted by controlling the movement of the Y-axis movement component through the control system. Compared with traditional inspection devices, manual focal length adjustment is avoided, achieving a high degree of automation and thus improving inspection efficiency.

[0059] The frame to be tested, 21, is an integrated circuit lead frame marked by a marking machine. The first direction can be horizontal, and the second direction can be vertical.

[0060] See Figure 6 The track transmission assembly includes a front track 2 and a rear track 1, which are parallel to each other on the fixed plate 20 along a first direction. A circular belt 16 is positioned opposite to the inner sides of the front track 2 and the rear track 1. The circular belt 16 is driven by a motor 6, and the frame 21 to be inspected is transported to the inspection position via the circular belt 16. The inspection position is the final inspection location of the inspection assembly, typically located at the end of the track transmission assembly. In this embodiment, the inspection position is the end of the conveying end of the circular belt 16. The motor 6 is a 2RK6RGN-CW2L2 model motor.

[0061] A blocking block 12 and a sensor 18 are provided at the right end of the front track 2 or the rear track 1. The blocking block 12 is used to block the frame 21 to be tested, which is placed on the circular belt 16, to the detection position. The sensor 18 is used to detect whether the frame 21 to be tested has reached the detection position and send an electrical signal to the control system. In this embodiment, the sensor 18 is an FD-ML model sensor.

[0062] See Figure 7The X-axis moving assembly includes an electric module 22, a cable chain 23, an electric module mounting plate 26, and a support base 24 arranged along a first direction. In this embodiment, one electric module 22 and one electric module mounting plate 26 are mounted on two support bases 24 via two pads 25, as shown. Figure 3 As shown.

[0063] The electric module 22 is mounted on the support base 24 via the electric module mounting plate 26; the cable chain 23 is mounted on the side of the electric module mounting plate 26 via the cable chain support plate 27 and the cable chain connecting seat 28.

[0064] See Figure 8 The Y-axis moving assembly includes a lead screw slide 29, a lead screw slide fixing plate 30, a fourth fixing seat 31, and a connecting rib 32.

[0065] The lower end of the lead screw slide 29 is connected to the lead screw slide fixing plate 30, and the upper end is connected to the side end of the fourth fixing seat 31. The connecting rib 32 is set at the connection between the lead screw slide 29 and the fourth fixing seat 31 to strengthen the connection.

[0066] See Figure 3 , Figure 5 The fourth fixed seat 31 is fixedly connected to the side end of the drag chain connecting seat 28, so that when the drag chain 23 drives the drag chain connecting seat 28 to move along the first direction, it also drives the fourth fixed seat 31 and the other Y-axis moving components connected to it to move together.

[0067] See Figure 9 The vision inspection component includes an industrial camera 33, a fixed-focus lens 34, a light source 38, a light source connection plate 36, a light source position adjustment block 37, and a camera mount 35.

[0068] The industrial camera 33 is connected to the camera mount 35. The industrial camera 33 is matched with the fixed-focus lens 34 and connected sequentially from top to bottom. The camera mount 35 is set on the lead screw slide 29. The light source 38 and the light source connecting plate 36 are both set below the fixed-focus lens 34. The light source connecting plate 36 is set on the upper surface of the light source 38. The light source connecting plate 36 is connected to the lead screw slide mount 30 through the light source position adjustment block 37.

[0069] It is understandable that, in order to facilitate detection and shorten the moving distance of the visual detection component, the light source 38 can be placed directly above the front and rear tracks.

[0070] Optionally, a light-transmitting hole is provided at the center of the light source connecting plate 36, and the light source connecting plate 36 and the light source 38 are arranged in a horizontal direction, with the central axis of the industrial camera 33 and the fixed-focus lens 34 coinciding with the central axis of the light-transmitting hole.

[0071] In this embodiment, the industrial camera 33 is model MV-CE200-10GM; the fixed-focus lens 34 is model ML-U1615SR-18C; and the light source 38 is model BTHO-150X220.

[0072] See Figure 3 The track transmission assembly also includes a first fixed seat 3, a coupling 5, a drive shaft 4, a second fixed seat 9, a bearing 14, a round belt conveyor pulley 19, a round belt pulley 15, a cylinder 10, a third fixed seat 11, a first mounting seat 13, and a second mounting seat 17.

[0073] The motor 6 is fixed to the fixed plate 20 by the first fixed seat 3. The output end of the motor 6 is connected to one end of the transmission shaft 5 by the coupling 5. The other end of the transmission shaft 5 passes through the left end of the front rail 2 and the rear rail 1 in sequence. The two ends of the transmission shaft 5 are also provided with the second fixed seat 9. The shaft collar 7 and the protective sleeve 8 are also provided at the connection between the transmission shaft 5 and the second fixed seat 9.

[0074] The front track 2 and the rear track 1 are respectively equipped with a circular belt conveyor wheel 19 and a circular belt pulley 15 at their left and right ends on the inner side. A circular belt 16 is sleeved on the circular belt conveyor wheel 19 and the circular belt pulley 15, and the drive shaft 5 passes through the circular belt conveyor wheel 19. The motor 6 drives the drive shaft 5 to rotate, and at the same time, the rotation of the drive shaft 5 drives the circular belt conveyor wheel 19 to rotate, thereby driving the circular belt 16 to rotate.

[0075] The cylinder 10 is fixed to the outside of the right end of the front rail 2 or the rear rail 1 via the third fixing seat 11. The output end of the cylinder 10 is connected to one end of the first mounting seat 13, and the other end of the first mounting seat 13 extends into the space between the front rail 2 and the rear rail 1 and is connected to the blocking block 12.

[0076] In this embodiment, a transmission structure is composed of one drive shaft 4, two second fixed seats 9, six bearings 14, two round belt pulleys 19, two round belt pulleys 15, and two round belts 16. The bearings 14 are of model B6800ZZ.

[0077] Under normal circumstances, the position of the blocking block 12 is higher than the position of the frame 21 to be tested. When the cylinder 10 receives a signal from the control system, the output end of the cylinder 10 drives the first mounting base 13 to descend, and the blocking block 12 connected to the first mounting base 13 will block the frame 21 to be tested; when the cylinder 10 receives a signal that the test is over, the output end of the cylinder 10 drives the first mounting base 13 to rise, and when the height of the blocking block 12 connected to the first mounting base 13 exceeds that of the frame 21 to be tested, the circular belt 16 will convey the frame 21 to be tested to the unloading and receiving position, and the test is completed.

[0078] The sensor 18 is mounted on the inside of the front rail 2 or the rear rail 1 via the second mounting base 17, and the top of the sensor 18 is lower than the upper surface of the circular belt 16 to prevent obstruction of the frame 21 to be detected.

[0079] Optionally, the electric module 22 is an embedded electric module. In this embodiment, the embedded electric module is model GTHA5-250-BL-100W.

[0080] The lead screw slide 29 is a miniature trapezoidal lead screw slide. In this embodiment, the FSL30-L04-50-BC-B28 model miniature trapezoidal lead screw slide is selected. The light source position adjustment block 37 is connected to the miniature trapezoidal lead screw slide fixing plate. The light source position adjustment block 37 can achieve fine adjustment of the light source position through the oblong hole of the miniature trapezoidal lead screw slide fixing plate to achieve the best lighting effect.

[0081] Cylinder 10 adopts the MGJ6-15-F8N model.

[0082] The control system is a PLC control system. In this embodiment, the PLC control system is a CJ2M-CPU13 model.

[0083] In other embodiments, the present invention also provides an online visual inspection method for lead frame marking, which utilizes the above-described online visual inspection mechanism for lead frame marking, and includes the following steps:

[0084] When starting the integrated circuit frame marking machine, the online visual inspection mechanism for lead frame marking is started simultaneously.

[0085] After the frame to be tested 21 is laser-marked by the integrated circuit frame marking machine, the control motor 6 drives the round belt 16 to transport the frame to be tested 21 along the front track 2 and the rear track 1. When the sensor 18 senses the frame to be tested 21, it sends a signal.

[0086] After receiving the signal from sensor 18, control cylinder 10 drives blocking block 12 to descend and block frame 21 to be detected;

[0087] The electric control module 22 drives the cable chain 23 to move the cable chain connecting seat 28 to the position to be inspected. At the same time, it drives the fourth fixed seat 31, the lead screw slide 29, the lead screw slide fixing plate 30, the fourth fixed seat 31 and other Y-axis moving groups, as well as the vision inspection components such as the light source position adjustment block 37, the light source connecting plate 36, and the light source 35 to move simultaneously. At the same time, the lead screw slide 29 is controlled to move the camera fixing seat 38, the industrial camera 33 and the fixed-focus lens 34 in the vertical direction. During the movement, the fixed-focus lens 34 is focused and the position of the light source 38 is finely adjusted. The industrial camera 33 is controlled to inspect the frame 21 to be inspected.

[0088] After the inspection is completed, the control cylinder 10 drives the blocking block 12 to rise, so that the blocking block is opened. The frame to be inspected 21 is conveyed to the unloading position by the round belt 16, and the inspection position will continue to inspect the next frame to be inspected 21.

[0089] Optionally, the focal length of the fixed-focus lens 34 is automatically adjusted by controlling the movement of the lead screw slide 29 via a PLC control system. The blocking block 12 driven by the cylinder 10 to block the frame 21 to be detected is also controlled by the PLC control system. It can be understood that, to achieve automation of the entire process, the movement of the track transmission component, the X-axis movement component, and the Y-axis movement component are all automatically controlled by the PLC control system. The circuit connections and control principles of the PLC control system for the electric module 22, the cylinder 10, and the lead screw slide 29 are existing technologies and will not be elaborated here.

[0090] In actual operation, the online visual inspection mechanism for marking the lead frame provided by this invention also needs to be connected to a computer. The computer is equipped with an I / O card (PCI7230 card) to control the inspection process of the industrial camera 33. The control principle of the I / O card (PCI7230 card) over the industrial camera 33 is also existing technology and will not be elaborated here.

[0091] The working principle of the online visual inspection mechanism for lead frame marking provided by this invention is as follows: After the integrated circuit lead frame marking machine marks the frame 21 to be inspected, it is conveyed to the inspection position via a circular belt 16. The sensor 18 set at the inspection position transmits the detected signal to the PLC control system. The PLC control system controls the cylinder 10 to drive the blocking block 12 to descend. At the same time, the electric module 22 drives the drag chain 23, the fourth fixed seat 31, the connecting rib 32, the lead screw slide fixed plate 30, the light source position adjustment block 37, the light source connecting plate 36, and the light source 38 to move simultaneously in the horizontal direction. The lead screw slide 29 installed on the lead screw slide fixed plate 30 drives the camera fixed seat 38, the industrial camera 33, and the fixed-focus lens 34 to move in the vertical direction. The PCI7230 card controls the industrial camera 33 to perform inspection. After the inspection is completed, the PLC control system controls the cylinder 10 to drive the blocking block 12 to rise, the blocking block opens, and the frame 21 to be inspected is conveyed to the unloading position via the circular belt 16. The inspection position will continue to inspect the next frame 21 to be inspected. The online visual inspection mechanism for lead frame marking has a reasonable structure and is highly automated. It does not require manual adjustment of the focus or the position of the light source, resulting in high inspection efficiency and making it worthy of widespread application.

[0092] The above description is merely the preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An online visual inspection mechanism for marking lead frames, characterized in that, include: Track transmission components, X-axis movement components, Y-axis movement components, vision inspection components, and control systems; The track transmission component, the X-axis moving component, and the Y-axis moving component are all mounted on a fixed plate. The X-axis moving component and the track transmission component are arranged parallel to each other on both sides of the fixed plate. The Y-axis moving component is connected to the X-axis moving component. The vision detection component is mounted on the side of the Y-axis moving component, and the detection end of the vision detection component is mounted above the track transmission component. The track transmission component is used to transmit the frame to be inspected. After transmitting the frame to be inspected to the detection position along the first direction, it sends an electrical signal to the control system. The control system controls the X-axis movement component and the Y-axis movement component to move along a direction parallel to the first direction. The control system also controls the Y-axis movement component and the vision detection component to move along a second direction. The vision detection component performs automatic detection while moving along the second direction. The frame to be tested is an integrated circuit lead frame that has been marked by a marking machine. The track transmission assembly includes a front track and a rear track arranged parallel to each other on the fixed plate along a first direction. A circular belt is arranged opposite to the inner side of the front track and the rear track. The circular belt is driven by a motor, and the frame to be tested is transmitted to the testing position through the circular belt. A blocking block and a sensor are provided at one end of the front track or the rear track. The blocking block is used to block the frame to be tested, which is placed on the circular belt, to the detection position. The sensor is used to detect whether the frame to be tested has reached the detection position and send an electrical signal to the control system. The X-axis moving assembly includes an electric module, a cable chain, an electric module mounting plate, and a support base arranged along a first direction; The electric module is mounted on the support base via the electric module mounting plate; the cable chain is mounted on the side of the electric module mounting plate via the cable chain support plate and the cable chain connecting seat. The Y-axis moving assembly includes a lead screw slide, a lead screw slide fixing plate, a fourth fixing seat, and a connecting rib; The lower end of the lead screw slide is connected to the lead screw slide fixing plate, and the upper end is connected to the side end of the fourth fixing seat. The connecting rib is provided at the connection between the lead screw slide and the fourth fixing seat. The fourth fixing seat is connected to the drag chain connecting seat; The vision inspection component includes an industrial camera, a fixed-focus lens, a light source, a light source connection plate, a light source position adjustment block, and a camera mounting base; The industrial camera is connected to the camera mount. The industrial camera is matched with the fixed-focus lens and connected sequentially from top to bottom. The camera mount is set on the lead screw slide. The light source and the light source connecting plate are both set below the fixed-focus lens. The light source connecting plate is set on the upper surface of the light source. The light source connecting plate is connected to the lead screw slide mounting plate through the light source position adjustment block. The light source is positioned directly above the front track and the rear track.

2. The online visual inspection mechanism for marking lead frames according to claim 1, characterized in that: The light source connecting plate is provided with a light-transmitting hole. The light source connecting plate and the light source are arranged in a horizontal direction. The central axis of the industrial camera and the fixed-focus lens coincides with the central axis of the light-transmitting hole.

3. The online visual inspection mechanism for marking lead frames according to claim 1, characterized in that: The track transmission assembly also includes a first fixed seat, a coupling, a drive shaft, a second fixed seat, a bearing, a round belt conveyor pulley, a round belt pulley, a cylinder, a third fixed seat, a first mounting seat, and a second mounting seat; The motor is fixed to the fixed plate by the first fixed seat. The output end of the motor is connected to one end of the transmission shaft by the coupling. The other end of the transmission shaft passes through the front track and the end of the rear track away from the blocking block in sequence. The two ends of the transmission shaft are provided with second fixed seats. The inner ends of the front track and the rear track are respectively provided with the circular belt conveyor wheel and the circular belt pulley, the circular belt is sleeved on the circular belt conveyor wheel and the circular belt pulley, and the drive shaft passes through the circular belt conveyor wheel; The cylinder is fixed to the outside of the front rail or the rear rail near the blocking block by the third fixing seat. The cylinder output end is connected to one end of the first mounting seat, and the other end of the first mounting seat extends between the front rail and the rear rail and is connected to the blocking block. The sensor is mounted on the inside of the front or rear track via the second mounting base, and the top of the sensor is lower than the upper surface of the circular belt.

4. The online visual inspection mechanism for lead frame marking according to claim 1 or 2, characterized in that: The electric module is an embedded electric module. The lead screw slide is a miniature trapezoidal lead screw slide. The control system is a PLC control system.

5. A method for online visual inspection of lead frame marking, comprising using the online visual inspection mechanism for lead frame marking as described in any one of claims 1-4, characterized in that, Includes the following steps: The control track transmission component transmits the frame to be tested along a first direction, and transmits the frame to be tested to the detection position; The X-axis moving component is controlled to drive the Y-axis moving component to move along a direction parallel to the first direction. At the same time, the Y-axis moving component is controlled to drive the visual inspection component to move along the second direction. The visual inspection component is controlled to move along the second direction while the frame to be inspected is inspected. After the frame to be tested is detected, the track transmission component is controlled to transport it to the unloading and receiving position.

6. The online visual inspection method for marking lead frames according to claim 5, characterized in that: The first direction is horizontal, and the second direction is vertical; The focal length of the vision detection component is automatically adjusted by the Y-axis movement component.

Images