Appearance inspection device for CNC products

Abstract

The present invention discloses a device for inspecting the appearance of CNC products. The device comprises a frame equipped with a loading station, an unloading station, a positioning assembly, a CCD detection assembly, a laser height measurement assembly, and a transfer assembly. The transfer assembly can grab a product from the loading station and sequentially transfer it to the positioning assembly, the CCD detection assembly, the laser height measurement assembly, and finally to the unloading station. The positioning assembly can position the product in a preset orientation. The unloading station includes a first discharge station and a second discharge station. The present invention can replace manual inspection of CNC product features such as appearance, size, and height, effectively shortening the inspection time for individual products, improving inspection accuracy, accurately distinguishing between good and bad products, and ensuring the quality of shipped products.

Description

Technical Field

[0001] The present invention relates to the technical field of CNC product detection, in particular to an appearance detection device for CNC products. Background Art

[0002] CNC machining refers to the process of using CNC machine tools (CNC, computer numerical control machine tools) for operation and processing, including precision machining, CNC lathes, CNC milling machines, CNC construction boring and milling machines, etc.

[0003] CNC machining technology can be used to manufacture a variety of products, such as electronic product accessories, digital product accessories, contact springs, metal stamping parts, machined parts, hardware fasteners, etc. CNC products have a wide range of applications and the requirements for product quality are becoming more and more stringent.

[0004] Inspection of CNC product appearance often requires multiple steps. Typically, individual products are manually placed on inspection machines, where they are individually inspected for features like size, height, and special markings. This cumbersome and inefficient process often results in inaccurate inspections, leading to inconsistent product quality. Summary of the Invention

[0005] The present invention provides an appearance inspection device for CNC products, which can solve one or more of the above-mentioned problems in the prior art.

[0006] According to one aspect of the present invention, there is provided an appearance inspection device for CNC products, comprising a frame, on which a loading station, an unloading station, a positioning component, a CCD detection component, a laser height measurement component, and a transfer component are configured;

[0007] The transfer component can grab the product from the loading station and transfer the product to the positioning component, CCD detection component, laser height measurement component in sequence, and finally to the unloading station;

[0008] The positioning component can place the product in a preset direction; the unloading station includes the first unloading station and the second unloading station; the operations of the loading station, unloading station, positioning component, CCD detection component, laser height measurement component and transfer component are all controlled by the PLC system.

[0009] By adopting the above technical solution and monitoring the operation of the entire appearance inspection device through the PLC system, continuous and automated appearance inspection of CNC products can be achieved. By cooperating with the loading station, unloading station and transfer component to replace manual material placement, automatic loading and unloading of products can be achieved. The product is installed in a preset direction through the positioning component, so that the same inspection standard can be determined for different batches of products, facilitating unified monitoring by the PLC system. The CCD inspection component and the laser height measurement component are integrated on the rack, and the transfer component is used to realize the transfer of products between different inspection units, so that the different appearance indicators of a single product can be inspected one by one, thereby shortening the inspection time of a single product. The PLC system can analyze the inspection results of a single product based on preset information, determine whether the product is good or defective, and improve the accuracy of inspection. Different discharge stations are set up for good and defective products to ensure the stability of the quality of shipped products.

[0010] In some embodiments, the transfer assembly includes a first manipulator, a second manipulator, a third manipulator, and a fourth manipulator;

[0011] The first robot can move in the X, Y or Z direction and transfer the product from the loading station to the positioning component;

[0012] The second robot can move in the X or Z direction and transfer the product from the positioning component to the CCD detection component;

[0013] The third robot can move in the X or Z direction and transfer the product from the CCD detection component to the laser height measurement component;

[0014] The fourth robot is a four-axis robot that can transfer the product from the laser height measurement component to the first discharge station or the second discharge station.

[0015] Therefore, the transfer of products between different workstations is achieved through the first robot, the second robot, the third robot and the fourth robot. Different robots perform their respective duties without interfering with each other, ensuring that a single product undergoes multiple inspections to prevent missed inspections and wrong inspections.

[0016] In some embodiments, the positioning assembly includes a rotating platform and a sensing optical fiber. The top of the rotating platform is provided with a positioning table that can rotate in the XY plane. The upper surface of the positioning table is provided with a fixed positioning ring. The product can fall into the positioning ring. A first positioning hole is provided on the side wall of the positioning ring, and a second positioning hole is provided on the side wall of the product. The sensing end of the sensing optical fiber is arranged opposite to the first positioning hole.

[0017] The product to be inspected is then transferred to the positioning platform, where it rotates to adjust its orientation. The positioning collar, however, does not rotate with the platform but is fixed to the periphery of the platform. The product is positioned using a second positioning hole on the product's sidewall and a first positioning hole on the collar. When the second positioning hole aligns with the first, detected by optical fiber sensing, the rotating platform stops, ensuring precise product positioning.

[0018] In some embodiments, a flipping assembly is arranged above the rotating platform, and the flipping assembly includes a support, a clamp and a lifting cylinder; the clamp is connected to the support and is used to clamp or release the product; the clamp is connected to a horizontally arranged rotating shaft, and the clamp can rotate around the rotating shaft in the XZ plane; the output end of the lifting cylinder is connected to the lower surface of the support.

[0019] Therefore, after the product is clamped by the clamping claws, the product can be turned over with the cooperation of the rotating shaft, so that the surface to be inspected of the product is exposed, which is convenient for the subsequent CCD component to capture the image of the product.

[0020] The rotating shaft can be sleeved with a gear, and a rack that can move left and right can be set in the support member, so that the gear and the rack are engaged, so that the rotating shaft can be rotated during the movement of the rack.

[0021] The lifting cylinder drives the support member up and down vertically. After gripping the product, the gripper moves upward with the support member and then rotates with the shaft. This prevents the positioning assembly's related structure from interfering with the gripper's rotation, ensuring smooth product flipping. Once the product is flipped as desired, the gripper moves downward with the support member and places the product onto the positioning table atop the rotating platform.

[0022] In some embodiments, the CCD detection assembly includes a camera, a first detection platform, and a single-axis slide, wherein the length direction of the single-axis slide is arranged along the X direction;

[0023] The first inspection platform is arranged on the frame and is used to receive the product; the first inspection platform is connected to the single-axis slide and can move back and forth along the length direction of the single-axis slide; the camera lens is arranged facing the single-axis slide.

[0024] Therefore, by moving the first inspection platform back and forth along the single-axis slide, the second robot can be used to transfer the positioned product from the rotating platform to under the camera lens, and the product size and the QR code fixed image information on the product surface can be inspected through image acquisition.

[0025] Generally, the camera of the CCD detection component is located in the middle of the single-axis slide, and the camera lens is vertically downwardly aligned with the moving path of the first detection platform. The first detection platform moves along the single-axis slide according to the instructions of the PLC system. When the first detection platform is close to the positioning component, the second robot transfers the product from the positioning platform to the first detection platform. The first detection platform then carries the product along the positive X direction and moves toward the side close to the camera. When the product is directly below the camera, the first detection platform pauses and the camera takes a picture of the product. After the picture is taken, the first detection platform continues to move along the positive X direction until it reaches the end of the single-axis slide. The third robot transfers the product from the first detection platform to the laser height measurement component for height measurement. Then, the first detection platform moves in the reverse X direction along the single-axis slide to continue transferring the next group of products positioned by the positioning component.

[0026] In some embodiments, the height of the camera of the CCD detection assembly can be adjusted, so that the camera can be easily focused. Specifically, the camera can be slidably connected to a vertically arranged slide rail.

[0027] In some embodiments, the laser height measurement assembly includes a second detection platform, a laser emitter and a movable bracket; the second detection platform is arranged on a frame for receiving the product; the laser emitter is configured on the movable bracket, and the movable bracket can move along the X direction or the Y direction to drive the laser emitter to move directly above the second detection platform or move out from directly above the second detection platform.

[0028] The laser light emitted by the laser emitter accurately measures the height of the product being tested. The mobile bracket can drive the laser emitter to move in the X or Y direction. Once the product being tested lands on the second inspection table, the mobile bracket moves the laser emitter directly above the second inspection table, aligning the laser emitter's emitting end with the product on the second inspection table for height detection. Once the test is complete, the laser emitter and the mobile bracket move out of the space above the second inspection table. The fourth robot then transfers the product on the second inspection table to either the first or second discharge station, based on the test results, for differentiated discharge.

[0029] In some embodiments, the unloading station includes a first storage table for placing good products and a second storage table for placing defective products; the fourth robot is capable of transferring the products located on the second inspection table to the first storage table or the second storage table, and transferring the products located on the first storage table to the first unloading station, and transferring the products located on the second storage table to the second unloading station.

[0030] Thus, the first and second storage tables can be used to distinguish and place good and bad products. Then, the four-axis robot will transfer the good products to the first discharge station for easy shipment, and transfer the bad products to the second discharge station for easy recycling. In this way, accurate material separation can be guaranteed.

[0031] Multiple product bins for receiving products can be set on the first storage table and the second storage table for intermediate transition. After the product bins are filled, they can be transferred centrally, which can improve the efficiency of placing good or defective products.

[0032] In some embodiments, a conveyor belt is configured between the loading station and the first unloading station, and the conveyor belt is stepped; the starting end of the conveyor belt is configured with a tray bin for placing trays, and the bottom of the tray bin is provided with a tray separation assembly, which can separate the trays one by one from the bottom of the tray bin and transfer them to the conveyor belt.

[0033] Multiple trays filled with products awaiting inspection can be stacked in the pallet bin. The tray separator separates each tray individually, and the first robot grabs the products from the separated trays and transfers them to the positioning assembly for visual inspection. Empty trays can then be transferred to the first discharge station via a conveyor belt to receive inspected products for recycling.

[0034] In some embodiments, the tray dividing assembly includes a clamping plate arranged at the bottom edge of the tray bin, which is connected to the slide cylinder. The slide cylinder can drive the clamping plate to be inserted above the bottom tray in the tray bin, and the bottom of the slide cylinder is connected to the lifting cylinder.

[0035] Therefore, the sliding cylinder drives the clamping plate to be inserted between the tray on the bottom layer and the tray above it, clamping and supporting all the trays above the tray on the bottom layer; then the lifting cylinder drives the sliding cylinder and the clamping plate to move upward, lifting the tray clamped by the clamping plate upward, so that the lowest tray is separated from the other trays stacked in the material bin and enters the conveyor belt for step-by-step transmission through the conveyor belt.

[0036] In some embodiments, the first discharge station is equipped with a recycling bin for placing the tray, the recycling bin is located at the end of the conveyor belt, and a closing assembly is configured at the bottom of the recycling bin; the closing assembly includes a support bar and a lifting cylinder, the support bar is arranged at the bottom edge of the recycling bin, and the support bar can be close to or away from the center of the recycling bin.

[0037] As a result, the support bar moves toward the center of the recycling bin and can support the trays in the recycling bin. When the new tray arrives at the bottom of the recycling bin, the support bar moves away from the center of the recycling bin, and the trays in the recycling bin and the newly arrived tray are stacked together, and the newly arrived tray is located directly above the output end of the jacking cylinder. Then, driven by the jacking cylinder, the stacked trays move upward synchronously until the newly arrived tray at the bottom rises above the support bar. At this time, the support bar moves again toward the center of the recycling bin and supports all the trays in the recycling bin. The output end of the jacking cylinder moves downward, preparing to close the next tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the three-dimensional structure of an appearance inspection device for CNC products according to one embodiment of the present invention;

[0039] Figure 2 for Figure 1 A top view of a device for inspecting the appearance of CNC products is shown;

[0040] Figure 3 for Figure 1 The schematic diagram of the structure of the loading station of the appearance inspection device for CNC products is shown;

[0041] Figure 4 for Figure 1 The schematic diagram of the structure of the first discharge station of the appearance inspection device for CNC products is shown;

[0042] Figure 5 for Figure 1 A schematic structural diagram of a first manipulator of a device for inspecting the appearance of CNC products is shown;

[0043] Figure 6 for Figure 1 A schematic structural diagram of a positioning assembly for an appearance inspection device for CNC products is shown;

[0044] Figure 7 for Figure 6 A partial enlarged view of part A in the middle;

[0045] Figure 8 for Figure 1 A schematic diagram of the structure of a flip assembly of a visual inspection device for CNC products is shown;

[0046] Figure 9 for Figure 1 A schematic diagram of the coordination structure of the positioning assembly and the flip assembly of the appearance inspection device for CNC products is shown;

[0047] Figure 10 for Figure 1 A schematic structural diagram of a second manipulator for an appearance inspection device for CNC products is shown;

[0048] Figure 11 for Figure 1 The structure diagram of the CCD detection component of the appearance inspection device for CNC products is shown;

[0049] Figure 12 for Figure 1 The schematic diagram of the structure of the laser height measurement component of the appearance inspection device for CNC products is shown;

[0050] Figure 13 for Figure 1 The diagram shows the structure of the third and fourth manipulators of the appearance inspection device for CNC products. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings.

[0052] Figures 1 to 13 This schematic diagram illustrates an appearance inspection device for CNC products according to one embodiment of the present invention. This device can be used to inspect circular CNC products for size and height, as well as graphical information such as QR codes printed on their surfaces. As shown, the device comprises a frame 100 equipped with a loading station 10, an unloading station, a positioning assembly 40, a CCD detection assembly 50, a laser height measurement assembly 60, and a transfer assembly.

[0053] The loading station 10 is equipped with a tray bin 11 for loading products. Multiple trays containing products to be inspected can be stacked in the bin 11. The unloading station includes a first discharge station 21 and a second discharge station 22. The first discharge station 21 is equipped with a recycling bin 211, which can hold multiple trays for discharging good products. The second discharge station 22 is equipped with a movable plate 221 for discharging defective products.

[0054] The positioning assembly 40 positions the product in a fixed orientation, with the QR code printed on it facing upward, for easier inspection. The CCD detection assembly 50 captures product image information and then detects information such as its shape, size, and QR code. The laser height measurement assembly 60 uses lasers to accurately measure the product's height and related structures, such as the height of steps and the depth of grooves.

[0055] The transfer assembly includes a first robot 31, a second robot 32, a third robot 33, and a fourth robot 34. The first robot 31 can grab products from the loading station 10 and transfer them sequentially to the positioning assembly 40; the second robot 32 can grab products from the positioning assembly 40 and transfer them to the CCD detection assembly 50; the third robot 33 can grab products from the CCD detection assembly 50 and transfer them to the laser height measurement assembly 60; and the fourth robot 34 can grab products from the laser height measurement assembly 60 and transfer them to the first discharge station 21 or the second discharge station 22. This ensures that every single product undergoes comprehensive inspection, preventing missed inspections or incorrect inspections.

[0056] The loading of the loading station 10, the unloading of the unloading station, and the operations of the positioning component 40, the CCD detection component 50, the laser height measurement component 60 and the transfer component are all monitored by the PLC system, thereby realizing the automated and continuous operation of the entire appearance inspection device.

[0057] A conveyor belt 4 is located between the loading station 10 and the first unloading station 21, performing step-by-step transport in the positive X direction. A tray bin 11 is located at the starting end of the conveyor belt 4. A tray separation assembly is located at the bottom of the bin 11, which separates the trays containing the products to be inspected from the bottom of the bin 11.

[0058] The tray bin 11 includes multiple vertical support arms 111, with multiple trays stacked on these arms 111 to form a hollow interior space. The tray separation assembly includes multiple L-shaped clamps 112 located at the bottom edge of the bin 11. These clamps 112 are positioned in pairs, separated by the trays within the bin 11.

[0059] The bottom of the clamping plate 112 is connected to the output end of the slide cylinder 113, which can drive the clamping plate 112 to move back and forth toward or away from the center of the tray bin 11. As the clamping plate 112 moves toward the center of the tray bin 11 under the drive of the slide cylinder 113, one end of the clamping plate 112 can be inserted above the bottom tray of the tray bin 11, clamping and supporting all trays above the bottom tray.

[0060] The bottom of the slide cylinder 113 is connected to the output of the lift cylinder 5, which drives the slide cylinder 113 and the clamping plate 112 in vertical reciprocating motion. Once the clamping plate 112 has clamped all the trays above the bottommost tray, the lift cylinder 5 drives the clamping plate 112 upward, separating the bottommost tray in the tray bin 11 from all the trays above it. The separated trays fall onto the conveyor belt 4 and move stepwise along the positive X direction.

[0061] After the bottom tray lands on conveyor belt 4 and completes one forward transfer in the X direction, the output end of lift cylinder 5, along with its connected slide cylinder 113 and clamping plate 112, moves downward until clamping plate 112 returns to its starting position. Then, driven by slide cylinder 113, clamping plate 112 moves away from the center of tray bin 11, releasing the clamped tray. After briefly releasing the tray, clamping plate 112, driven by slide cylinder 113, moves again toward the center of tray bin 11, separating the next tray located at the bottom of bin 11.

[0062] The separated tray is transported along the X-direction by the conveyor belt 4 and then arrives under the first robot 31. The first robot 31 grabs the product from the tray and transfers it to the positioning assembly 40 for orientation processing.

[0063] The first manipulator 31 includes two side-by-side grippers 6 and a fixed plate 7. The grippers 6 are fixedly connected to the fixed plate 7. The first manipulator 31 can move in the X, Y, or Z directions. Specifically, the fixed plate 7 is slidably connected to the Z-axis slide 3, enabling reciprocating movement in the Z direction; the Z-axis slide 3 is slidably connected to the X-axis slide 1, enabling reciprocating movement in the X direction; and the X-axis slide 1 is slidably connected to the Y-axis slide 2. In this way, through the coordination of the Z-axis slide 3, the X-axis slide 1, and the Y-axis slide 2, the first manipulator 31 can be moved within a certain space, ensuring that the grippers 6 can smoothly grasp the product and accurately transfer it to the positioning assembly 40.

[0064] The positioning assembly 40 includes a rotating platform 41 and a sensing optical fiber 44. A positioning platform 42 is provided on the top of the rotating platform 41. The bottom of the rotating platform 41 is connected to the output end of the servo motor. Driven by the servo motor, the positioning platform 42 can rotate in the XY plane.

[0065] A flip assembly 70 is located above the rotating platform 41. This assembly comprises a support 75, a gripper 71, and a lifting cylinder 5. The gripping end of the gripper 71 is positioned directly above the positioning platform 42. When the first robot 31 releases the product, the gripper 71 grips the product and flips it 180° in the XZ plane. This allows a product placed in an inverted position to be flipped to the right side, ensuring that the QR code printed on the product faces upward for easier inspection.

[0066] Specifically, the support member 75 is a box-shaped structure. The side of the clamping jaw 71 away from the clamping end is connected to the rotating shaft 72. The rotating shaft 72 is arranged in the horizontal direction, and the clamping jaw 71 can rotate with the rotating shaft 72 in the XZ plane. The rotating shaft 72 is mounted on the side wall of the support member 75. The end of the rotating shaft 72 away from the clamping jaw 71 is connected to the gear 73. The gear 73 is mounted on the outside of the rotating shaft 72. The interior of the support member 75 is provided with a rack 74 extending in the X direction. The gear 73 meshes with the rack 74, and the rack 74 can move left and right in the X direction. In this way, the rotating shaft 72 drives the clamping jaw 71 to rotate in the XZ plane during the movement of the rack 74.

[0067] The output end of the lifting cylinder 5 is connected to the lower surface of the support member 75, so that the lifting cylinder 5 can drive the support member 75 and the clamping jaw 71 to move up and down in the vertical direction. After the clamping jaw 71 clamps the product to be inspected, the lifting cylinder 5 operates to drive the support member 75 and the clamping jaw 71 to move upward, and then the rack 74 moves along the X direction, and the clamping jaw 71 rotates with the rotating shaft 72 to flip the product to be inspected 180° so that the surface to be inspected of the product faces upward. In this way, the relevant structures of the positioning assembly 40 can be prevented from interfering with the rotation of the clamping jaw 71, ensuring smooth flipping of the product. After the product to be inspected is flipped, the output end of the lifting cylinder 5 moves downward, and the clamping jaw 71 moves downward with the support member 75, and then the product is released on the positioning platform 42 on top of the rotating platform 41.

[0068] The top surface of the positioning platform 42 is equipped with a fixed positioning collar 43. The first manipulator 31 releases the grasped product above the positioning platform 42, causing it to fall into the positioning collar 43. Once on the positioning platform 42, the product can rotate relative to the positioning platform 42, while the positioning collar 43 remains fixed and does not rotate. A first positioning hole 431 is defined in the sidewall of the positioning collar 43, while a second positioning hole is defined in the sidewall of the product. The sensing end of the sensing fiber 44 is positioned opposite the first positioning hole 431 in the positioning collar 43. During the rotation of the positioning platform 42, the positioning platform 42 and the product thereon stop rotating after the sensing fiber 44 passes through the first positioning hole 431 and senses the second positioning hole.

[0069] Then, the second robot 32 grabs the product to be inspected from the positioning platform 42 and transfers it to the CCD inspection component 50 for inspection of shape, size and two-dimensional code image.

[0070] The second manipulator 32 has a similar structure to the first manipulator 31, consisting of two side-by-side grippers 6 and a fixed plate 7. The grippers 6 are fixedly connected to the fixed plate 7, allowing for movement in either the X or Z directions. Specifically, the fixed plate 7 of the second manipulator 32 is slidably connected to the Z-axis slide 3, enabling reciprocating movement in the Z direction. The Z-axis slide 3 is also slidably connected to the X-axis slide 1, enabling reciprocating movement in the X direction. This allows the second manipulator 32 to move vertically downward to approach the product on the positioning table 42. After grasping the product, the second manipulator 32 then moves upward in the Z direction. After grasping the product to be inspected, the second manipulator 32 then moves along the X-axis slide 1 toward the CCD inspection assembly 50 until the grippers 6 are directly above the first inspection table 52 of the CCD inspection assembly 50. The fixed plate 7 then moves downward along the Z-axis slide 3 until the grippers 6 are close to the first inspection table 52. After releasing the product, the first manipulator 31 moves again toward the end near the positioning assembly 40, ready to grasp the next set of products to be inspected.

[0071] The CCD detection assembly 50 includes a single-axis slide 53 extending along the X direction, a first detection platform 52 slidably connected to the single-axis slide 53 , and a camera 51 .

[0072] One end of the uniaxial slide 53 is positioned adjacent to the rotating platform 41 of the positioning assembly 40, while the other end is positioned adjacent to the laser altimeter assembly 60. A camera 51 is positioned above and in the middle of the uniaxial slide 53, with its lens pointing vertically downward toward the uniaxial slide 53. A ring light source 54 is positioned below the camera 51 to illuminate the camera 51 while it is taking photos. The camera 51 is slidably connected to a vertically mounted slide rail 55, which allows for height adjustment to facilitate focusing and ensure clear images.

[0073] The first inspection platform 52 can move back and forth along a single-axis slide 53, pausing when passing by the camera 51 to allow the camera 51 to capture an image. The image information captured by the camera 51 is fed back to the PLC system, which analyzes the received image based on preset information to determine whether the corresponding product shape, size, and printed QR code meet the requirements. Based on the analysis and judgment results, the product is judged as good or bad.

[0074] After the CCD inspection assembly 50 completes inspection, the product continues to move in the positive X direction along the uniaxial slide 53 along the first inspection platform 52 until it reaches the end of the slide 53, where it pauses. The third robot 33 grabs the product from the first inspection platform 52 and transfers it to the laser height measurement assembly 60. After the product transfer is complete, the first inspection platform 52 moves in the negative X direction along the uniaxial slide 53 until it reaches the starting end of the slide 53, preparing to transfer the next group of products to be inspected.

[0075] The third manipulator 33 has the same structure as the second manipulator 32. The gripper 6 is fixedly connected to the fixed plate 7. The fixed plate 7 cooperates with the Z-axis slide 3 and the X-axis slide 1 to enable the third manipulator 33 to move back and forth in the X-axis or Z-axis. It can grab products from the second inspection table 62 and transfer them to the second inspection table 62 of the laser height measurement component 60.

[0076] The laser height measurement assembly 60 includes a second inspection platform 62 fixedly mounted on the frame 100, and a movable laser emitter 61. The laser emitter 61 is connected to a movable bracket 63. The movable bracket 63 is slidably connected to the X-axis slide 1, which is slidably connected to the Y-axis slide 2. In this way, the movable bracket 63 can, in conjunction with the X-axis slide 1 and the Y-axis slide 2, move the laser emitter 61 to directly above the second inspection platform 62, so that the emitting end of the laser emitter 61 is aligned with the product on the second inspection platform 62. The laser emitter 61 then emits a laser downward to measure the height of the product to be inspected, or the height of a certain structure on the product to be inspected. The laser emitter 61 is connected to the PLC system and can feed back the inspection data to the PLC system. The PLC system uses preset information as a standard to analyze and determine whether the inspection results are qualified, and determines whether the product is good or defective based on the inspection results.

[0077] After being detected by the laser height measuring component 60 , the products are classified and unloaded by the fourth robot 34 .

[0078] The fourth manipulator 34 is a four-axis manipulator with two side-by-side grippers 6. It has high flexibility and can move within a certain space, so it is easy to grab products and install them, and classify and unload products based on whether they are qualified or not.

[0079] The rack 100 is provided with a first storage platform 23 and a second storage platform 24 arranged side by side with the second inspection platform 62. The first storage platform 23 and the second storage platform 24 are each provided with two product bins 25, which can simultaneously accommodate two products. The first storage platform 23 is used to place good products, and the second storage platform 24 is used to place defective products.

[0080] The fourth robot 34 can grab products from the second inspection table 62 and transfer the good products that are qualified by the CCD inspection component 50 and the laser height measurement component 60 to the first storage table 23; those that are not qualified by both inspection structures are defective products, and the fourth robot 34 transfers them to the second storage table 24.

[0081] Next to the first storage platform 23, a set of flipping components 70 is also set. This set of flipping components 70 is the same as the flipping components 70 in the positioning component 40 that cooperate with the rotating platform 41. It is used to flip the product again to meet the product shipping requirements. A flipping platform 76 is provided below the clamping claw 71 of this set of flipping components 70.

[0082] Once the two product bins 25 on the first storage table 23 are full, the fourth robot 34 transfers the products on the first storage table 23 to the flipping table 76. The products are gripped by the grippers 71 of the flipping assembly 70 and flipped 180° in the XZ plane, with the QR code printed on the product facing downward. After the flipping is complete, the fourth robot 34 transfers the qualified products from the flipping table 76 to the first discharge station 21.

[0083] The first discharge station 21 is equipped with a recycling bin 211 for placing Tray. The recycling bin 211 is located at the end of the conveyor belt 4. Similar to the tray bin 11 arranged at the loading station 10, the recycling bin 211 is also surrounded by a plurality of vertically arranged support arms 111 to form a hollow internal space for accommodating Tray.

[0084] Trays separated from the bottom of the tray bin 11 at the loading station 10 are conveyed by the step-by-step conveyor belt 4. After all the products in the tray have been removed, the empty tray continues to move in the positive X direction along the conveyor belt 4 until it reaches the first unloading station 21 and stops near the recycling bin 211 to receive products that have been tested and determined to be good. Once the tray is filled with materials by the fourth robot 34, the tray enters the recycling bin 211 on the left and right sides of the conveyor belt 4 for palletizing.

[0085] The bottom of the recycling bin 211 is equipped with a pallet closing assembly, which includes a support bar 212 and a lifting cylinder 5. The support bar 212 is located at the bottom edge of the recycling bin 211 and can move closer to or further away from the center of the recycling bin 211. The support bar 212 moves toward the center of the recycling bin 211 to support the multiple pallets in the recycling bin 211.

[0086] When a new, fully loaded tray arrives at the bottom of the recycling bin 211 along the conveyor belt 4, the support bar 212 moves away from the center of the recycling bin 211, and the trays in the recycling bin 211 and the newly arrived tray are stacked together, with the newly arrived tray positioned directly above the output end of the lifting cylinder 5. Driven by the lifting cylinder 5, the stacked trays then move upward synchronously until the newly arrived tray at the bottom rises above the support bar 212. At this point, the support bar 212 moves again toward the center of the recycling bin 211, supporting all trays in the recycling bin 211. The output end of the lifting cylinder 5 moves downward, preparing to close the next tray containing qualified products.

[0087] For products detected as defective, they are transferred from the second inspection table 62 to the second storage table 24 via a four-axis robot. When the product bin 25 on the second storage table 24 is completely filled, the four-axis robot synchronously transfers the two defective products on the second storage table 24 to the second discharge station 22.

[0088] The second discharge station 22 is equipped with a movable plate 221. The lower surface of the movable plate 221 is slidably connected to the Y-axis slide 2, allowing for reciprocating movement in the Y direction. Generally, a tray can be placed on the upper surface of the movable plate 221 to receive defective products. Once the tray is filled with defective products, it can be moved with the Y-axis slide 2 to facilitate tray replacement.

[0089] In this way, before the product enters the first discharge station 21 or the second discharge station 22, it first transitions on the first placement table 23 or the second placement table 24, and then is synchronously transferred by the four-axis manipulator, which can improve efficiency.

[0090] Furthermore, to enhance protection for the entire device, a protective housing can be installed outside the frame 100 to protect the entire device from external interference. To facilitate product loading and unloading, multiple openings can be provided on the protective housing, corresponding to the loading station 10, the first discharge station 21, and the second discharge station 22. To enhance safety, light barriers can be installed at the openings of the protective housing to prevent accidental injury to the operator during operation.

[0091] The appearance inspection device for CNC products in this embodiment can complete inspection of product features such as shape, size, height, and related graphics after a single loading operation, achieving a high degree of mechanization. Furthermore, through the coordination of multiple manipulators, automatic loading and unloading of products can be achieved, reducing reliance on manpower and improving the level of automation. A PLC system monitors the operation of the device throughout the entire process, ensuring the reliability of inspection results and the stability of shipped product quality.

[0092] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. Appearance inspection device for CNC products, characterized in that: The machine comprises a frame (100), wherein a loading station (10), an unloading station, a positioning component (40), a CCD detection component (50), a laser height measurement component (60), and a transfer component are arranged on the frame (100); The transfer component can grab the product from the loading station (10), and transfer the product to the positioning component (40), the CCD detection component (50), the laser height measurement component (60) in sequence, and finally transfer it to the unloading station; The positioning assembly (40) is capable of placing the product in a preset direction; the unloading station comprises a first unloading station (21) and a second unloading station (22); The positioning assembly (40) includes a rotating platform (41) and a sensing optical fiber (44); A positioning platform (42) capable of rotating in an XY plane is provided on the top of the rotating platform (41); a fixed positioning ring (43) is provided on the upper surface of the positioning platform (42); the product can fall into the positioning ring (43); a first positioning hole (431) is provided on the side wall of the positioning ring (43); and a second positioning hole is provided on the side wall of the product; the sensing end of the sensing optical fiber (44) is arranged opposite to the first positioning hole (431); The laser height measurement assembly (60) includes a second detection platform (62), a laser transmitter (61) and a movable bracket (63); The second testing platform (62) is provided on the frame (100) and is used to receive the product; The laser emitter (61) is arranged on the movable bracket (63), and the movable bracket (63) can move along the X direction or the Y direction to drive the laser emitter (61) to move to the top of the second detection platform (62) or move out from the top of the second detection platform (62).

2. The appearance inspection device for CNC products according to claim 1, characterized in that: The transfer assembly includes a first manipulator (31), a second manipulator (32), a third manipulator (33) and a fourth manipulator (34); The first manipulator (31) is capable of moving in the X direction, the Y direction or the Z direction and transferring the product from the loading station (10) to the positioning assembly (40); The second manipulator (32) is capable of moving in the X direction or the Z direction and transferring the product from the positioning component (40) to the CCD detection component (50); The third manipulator (33) is capable of moving in the X direction or the Z direction and transferring the product from the CCD detection component (50) to the laser height measurement component (60); The fourth manipulator (34) is a four-axis manipulator capable of transferring products from the laser height measurement component (60) to the first discharge station (21) or the second discharge station (22).

3. The appearance inspection device for CNC products according to claim 2, characterized in that: A turning assembly (70) is disposed above the rotating platform (41), and the turning assembly (70) includes a support member (75), a clamping claw (71) and a lifting cylinder (5); The clamping jaw (71) is connected to the support member (75) and is used to clamp or release the product; the clamping jaw (71) is connected to a rotating shaft (72) arranged in a horizontal direction, and the clamping jaw (71) can rotate around the rotating shaft (72) in the XZ plane; The output end of the lifting cylinder (5) is connected to the lower surface of the support member (75).

4. The appearance inspection device for CNC products according to claim 2, characterized in that: The CCD detection component (50) includes a camera (51), a first detection platform (52) and a single-axis slide (53), wherein the length direction of the single-axis slide (53) is arranged along the X direction; The first inspection platform (52) is arranged on the frame (100) for receiving the product; the first inspection platform (52) is connected to the single-axis slide (53) and can move back and forth along the length direction of the single-axis slide (53); the lens of the camera (51) is arranged facing the single-axis slide (53).

5. The appearance inspection device for CNC products according to claim 2, characterized in that: The unloading station comprises a first placement table (23) for placing good products and a second placement table (24) for placing bad products; The fourth robot (34) is capable of transferring the product located on the second inspection table (62) to the first storage table (23) or the second storage table (24), and transferring the product located on the first storage table (23) to the first discharge station (21), and transferring the product located on the second storage table (24) to the second discharge station (22).

6. The appearance inspection device for CNC products according to any one of claims 1 to 5, characterized in that: A conveyor belt (4) is arranged between the loading station (10) and the first discharging station (21), and the conveyor belt (4) is in a step-by-step transmission mode; The starting end of the conveyor belt (4) is provided with a tray bin (11) for placing trays, and the bottom of the tray bin (11) is provided with a tray separation assembly, which can separate the trays one by one from the bottom of the tray bin (11) and transfer them to the conveyor belt (4).

7. The appearance inspection device for CNC products according to claim 6, characterized in that: The tray dividing assembly includes a clamping plate (112) arranged at the bottom edge of the tray bin (11), the clamping plate (112) is connected to a slide cylinder (113), and the slide cylinder (113) can drive the clamping plate (112) to be inserted above a tray at the bottom layer in the tray bin (11), and the bottom of the slide cylinder (113) is connected to a lifting cylinder (5).

8. The appearance inspection device for CNC products according to claim 6, characterized in that: The first discharge station (21) is equipped with a recycling bin (211) for placing trays, the recycling bin (211) is located at the end of the conveyor belt (4), and a closing assembly is provided at the bottom of the recycling bin (211); The closing assembly comprises a support bar (212) and a lifting cylinder (5); the support bar (212) is arranged at the bottom edge of the recovery bin (211), and the support bar (212) can be close to or away from the center of the recovery bin (211).

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