Full-automatic optical selection equipment for screw workpiece quality detection

Abstract

The application relates to a full-automatic light selection device for screw workpiece quality detection, and belongs to the field of screw production quality detection. The device comprises a rack, a transfer disc, a feeding mechanism, a straightness detection station, an overall detection station, a head detection station, a thread detection station and a discharging station. The transfer disc is rotationally arranged on the rack and is used to drive the screw to be transferred to different stations. A plurality of clamping grooves for clamping the rod part of the screw are circumferentially and intervalled arranged on the edge of the transfer disc. The feeding mechanism is used to feed the screw into the clamping groove. The straightness detection station is used to detect the straightness of the screw. The overall detection station is used to detect the length and diameter of the screw. The head detection station is used to detect the head of the screw. The thread detection station is used to detect the thread of the screw. The discharging station is used to discharge the screw from the transfer disc. The application has the effect of improving the efficiency of screw workpiece quality detection.

Description

Technical Field

[0001] This application relates to the field of screw production quality inspection, and in particular to a fully automatic optical sorting device for screw workpiece quality inspection. Background Technology

[0002] As a core component for mechanical transmission, connection, and fastening, screws are widely used in industries such as equipment manufacturing, automobiles, home appliances, and hardware. After the screw is machined, key parameters such as overall length, slot height, thread pitch, head slot dimensions, and straightness need to be inspected to ensure assembly accuracy and overall equipment performance.

[0003] Currently, the existing screw workpiece quality inspection mainly adopts manual inspection combined with industrial camera vision inspection. The manual inspection process is inefficient, and the detection functions for different parameters are scattered. The feeding, inspection and sorting processes need to be coordinated manually, resulting in the low efficiency of the existing screw workpiece quality inspection and making it difficult to meet the needs of large-scale production. Summary of the Invention

[0004] To improve the efficiency of screw workpiece quality inspection, this application provides a fully automatic optical sorting device for screw workpiece quality inspection.

[0005] The fully automatic optical sorting device for screw workpiece quality inspection provided in this application adopts the following technical solution: A fully automatic optical sorting device for inspecting the quality of screw workpieces includes a frame, a transfer tray, a feeding mechanism, a straightness inspection station, an overall inspection station, a head inspection station, a thread inspection station, and a unloading station. The transfer tray is rotatably mounted on the frame and is used to transfer the screw to different stations. Multiple slots are spaced circumferentially along the edge of the transfer tray for the screw shaft to engage. The feeding mechanism is mounted on the frame and is used to feed the screw into the slots. The straightness inspection station is mounted on the frame and is used to inspect the straightness of the screw. The overall inspection station is mounted on the frame and is used to inspect the length and diameter of the screw. The head inspection station is mounted on the frame and is used to inspect the head of the screw. The thread inspection station is mounted on the frame and is used to inspect the threads of the screw. The unloading station is mounted on the frame and is used to drive the screw to unload from the transfer tray.

[0006] By adopting the above technical solution, the feeding mechanism feeds the screw to be inspected into the slot opened on the edge of the transfer plate. The head of the screw, with a diameter larger than the diameter of the slot, abuts against the transfer plate. Then, the transfer plate rotates, and the feeding mechanism feeds the next screw into the next slot. At the same time, as the transfer plate rotates, multiple screws can be moved, allowing multiple screws on the transfer plate to move to the next station for transfer. The straightness detection station detects the straightness of the screw, the overall detection station detects the length and diameter of the screw, the head detection station detects the head of the screw, and the thread detection station detects the thread of the screw. This enables the detection of multiple parameters of the screw, reduces the impact of manual inspection on the efficiency of screw inspection, improves the connection efficiency of screw inspection of different parameters, and thus improves the efficiency of screw workpiece quality inspection.

[0007] Optionally, the straightness detection station includes a sleeve, a lifting component, a pressing component, and a pressure sensor. The sleeve is slidably mounted on the frame. The lifting component is mounted on the frame and is used to drive the sleeve upward to be fitted onto the screw. The pressing component is mounted on the frame and is used to press the head of the screw onto the transfer plate. The pressure sensor is mounted on the pressing component and is used to detect the pressure applied by the screw to the pressing component.

[0008] By adopting the above technical solution, the transfer disc drives the screw to move above the sleeve. The clamping component clamps the head of the screw onto the transfer disc. Then, the lifting component drives the sleeve to rise, and the screw gradually inserts into the sleeve as it rises. If the screw is fully inserted into the sleeve, the pressure applied by the sleeve to the screw and transmitted to the clamping component remains stable. The pressure detected by the pressure sensor is within the acceptable range, and the straightness of the screw is acceptable. If the straightness of the screw is unacceptable, the screw will abut against the side wall of the sleeve. The force of the lifting component driving the sleeve to rise is transmitted to the screw, and the pressure transmitted by the screw to the clamping component increases. The pressure detected by the pressure sensor exceeds the acceptable range, and the straightness of the screw is unacceptable. This method conveniently realizes the detection of the straightness of the screw.

[0009] Optionally, the overall inspection station includes a first inspection camera module, a second inspection camera module, an illumination lamp, and a positioning component. The first inspection camera module is mounted on the frame and is used to inspect the length and diameter of the screw head. The second inspection camera module is mounted on the frame and is used to inspect the length and diameter of the screw shank. The illumination lamp is mounted on the frame and is used to provide illumination. The positioning component is mounted on the frame and is used to position the screw on the frame.

[0010] By adopting the above technical solution, the transfer plate drives the screw to the inspection station, the positioning component positions the screw on the frame, the lighting provides illumination to the screw, the first inspection camera module takes a picture of the head of the screw to detect the length and diameter of the screw head, and the second inspection camera module takes a picture of the shank of the screw to detect the length and diameter of the shank, thereby facilitating the inspection of the length and diameter of the screw.

[0011] Optionally, the positioning component includes pressure blocks and a control element. Two pressure blocks are slidably arranged facing each other on the frame, and the two pressure blocks are respectively located at both ends of the screw. The control element is arranged on the frame and is used to drive the two pressure blocks to move closer or further apart.

[0012] By adopting the above technical solution, after the transfer disk drives the screw to move between the two pressure blocks, the control component drives the two pressure blocks to move closer to each other. The two pressure blocks can then abut against the two ends of the screw respectively, thereby positioning the screw, improving the stability of the screw, and thus improving the accuracy of the first detection camera module and the second detection camera module in taking pictures of the screw for detection.

[0013] Optionally, the frame is provided with an adjustment assembly for adjusting the positions of the first detection camera module and the second detection camera module. The adjustment assembly includes a horizontal slide rail, a vertical slide rail, a first adjustment member, a second adjustment member, and a third adjustment member. The horizontal slide rail is disposed on the frame, the vertical slide rail is slidably disposed on the horizontal slide rail, the first adjustment member is disposed on the frame and is used to drive the vertical slide rail to slide, both the first and second detection camera modules are slidably disposed on the vertical slide rail, the second adjustment member is disposed on the frame and is used to drive the first detection camera module to slide, and the third adjustment member is disposed on the frame and is used to drive the second detection camera module to slide.

[0014] By adopting the above technical solution, for different detection needs, the first adjusting member drives the vertical slide rail to slide on the horizontal slide rail. The vertical slide rail can then move the first and second detection camera modules closer to or further away from the transfer disk. The second adjusting member drives the first detection camera module to slide vertically, and the third adjusting member drives the second detection camera module to slide vertically. This allows for adjustment of the height and spacing of the first and second detection camera modules, thereby enabling positional adjustment and improving their applicability to different detection needs.

[0015] Optionally, the head inspection station includes a light source, a third inspection camera module, and a clamping assembly. The light source is mounted on the frame and is used to illuminate the head of the screw. The third inspection camera module is mounted on the frame and is used to inspect the appearance and size of the screw head. The clamping assembly is mounted on the frame and is used to position the screw.

[0016] By adopting the above technical solution, the transfer disk drives the screw to the position of the third inspection camera module, the clamping component positions the screw, the light source provides illumination to the screw, and the third inspection camera module can take pictures of the head of the screw, thereby conveniently inspecting the appearance and size of the screw head.

[0017] Optionally, the clamping assembly includes a fixed plate, a clamping plate, and a linkage component. The fixed plate is mounted on the frame and is used to abut against the screw. The clamping plate is slidably mounted on the frame toward the fixed plate. The linkage component is mounted on the frame and is used to drive the clamping plate to move when the pressure block moves.

[0018] By adopting the above technical solution, when the pressure block moves to clamp the screw, the linkage drives the clamping plate to approach the fixed plate. The clamping plate and the fixed plate can clamp and position the screw at the head inspection station, reducing the drive source required to position the screw at the overall inspection station and the head inspection station, and improving the synchronization of the screw being positioned and released at the overall inspection station and the head inspection station, thus ensuring the normal rotation of the transfer tray.

[0019] Optionally, the linkage includes a guide rod, a first wedge, a linkage rod, and a second wedge. The guide rod is disposed on a pressure block abutting the bottom of the screw and is slidably connected to the first wedge. The first wedge is slidably disposed on the frame and is used to move toward the second wedge when the guide rod moves upward. The linkage rod is disposed on the first wedge and is slidably connected to the second wedge. The second wedge is slidably disposed on the frame and is used to drive the clamping plate to move toward the fixed plate when the linkage rod moves away from the guide rod. The clamping plate is disposed on the second wedge.

[0020] By adopting the above technical solution, when the pressure block moves upward to clamp the screw, the pressure block drives the guide rod to move, the guide rod drives the first wedge to move toward the second wedge, the first wedge drives the linkage rod to move away from the guide rod, the linkage rod drives the second wedge to move toward the fixed plate, the second wedge drives the clamping plate to move closer to the fixed plate, and the clamping plate and the fixed plate can clamp and position the screw.

[0021] Optionally, the thread inspection station includes an inspection seat, a screw head, a first sliding member, a screwing member, an inspection plate, and a second sliding member. The inspection seat is slidably mounted on the frame. The screw head is rotatably mounted on the inspection seat and is used to fit onto the head of the screw. The first sliding member is mounted on the frame and is used to drive the inspection seat to slide. The screwing member is mounted on the inspection seat and is used to drive the screw head to rotate. The inspection plate is slidably mounted on the frame. The inspection plate has a threaded hole for the threaded section at the bottom of the screw to be screwed in. The second sliding member is mounted on the frame and is used to drive the inspection plate to move.

[0022] By adopting the above technical solution, the transfer disc drives the screw to move below the detection seat. The first sliding member drives the detection seat to move the screw head closer to the head of the screw, so that the screw head can be fitted onto the head of the screw. Then, the second sliding member drives the detection plate to move closer to the detection seat, so that the detection plate can move upward and make the threaded section at the bottom of the screw abut against the thread of the threaded hole. The turning member drives the screw head to rotate, so that the screw head can drive the screw to rotate. If the threaded section of the screw is qualified, the threaded section of the screw can drive the detection plate to continue to move upward, so as to conveniently detect the screw thread.

[0023] Optionally, the second sliding component includes a sliding cylinder and a pusher. The sliding cylinder is mounted on the frame, and the piston rod of the sliding cylinder slides through the detection plate. The pusher is mounted on the piston rod of the sliding cylinder and abuts against the bottom of the detection plate.

[0024] By adopting the above technical solution, the piston rod of the sliding cylinder extends, causing the pusher to abut against the bottom of the detection plate. The pusher can then drive the detection plate to move upward as the piston rod of the sliding cylinder extends. When the screw rotates subsequently, the detection plate moves away from the pusher, and the piston rod of the sliding cylinder guides the upward movement of the detection plate, enabling the detection plate to move upward stably.

[0025] In summary, this application includes at least one of the following beneficial technical effects: Reduce the impact of manual labor on screw inspection efficiency, improve the connection efficiency of different screw inspection parameters, and thus improve the efficiency of screw workpiece quality inspection; When the pressure block moves to clamp the screw, the linkage drives the two clamping plates to rotate closer to each other. The two clamping plates can clamp and position the other screw, reducing the drive source required to position the screw at the overall inspection station and the head inspection station, and improving the synchronization of the screw being positioned and released at the overall inspection station and the head inspection station, ensuring the normal rotation of the transfer tray. The screwing device drives the screw head to rotate, which in turn drives the screw to rotate. If the thread section of the screw is qualified, the thread section of the screw can drive the detection plate to continue to move upward, making it convenient to detect the screw thread. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a fully automatic optical sorting device for screw workpiece quality inspection according to an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the straightness detection station according to an embodiment of this application.

[0028] Figure 3 This is a structural schematic diagram of the overall inspection station and the head inspection station in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the linkage component in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the thread inspection station according to an embodiment of this application.

[0031] Reference numerals: 1. Frame; 2. Transfer tray; 21. Slot; 3. Feeding mechanism; 31. Vibratory feeder; 32. Feeding chute; 4. Straightness inspection station; 41. Sleeve; 42. Lifting component; 43. Holding component; 431. Second cylinder; 432. Holding plate; 433. Pin; 434. Telescopic spring; 5. Overall inspection station; 51. First inspection camera module; 52. Second inspection camera module; 53. Illumination lamp; 54. Positioning component; 541. Pressure block; 542. Control component; 6. Head inspection station; 61. Light source lamp; 62. Third inspection camera module; 63. Clamping component; 631. Fixed plate; 632. Clamping plate 633, Linkage component; 6331, Guide rod; 6332, First wedge; 6333, Linkage rod; 6334, Second wedge; 7, Thread inspection station; 71, Inspection seat; 72, Tightening head; 73, First sliding component; 74, Tightening component; 75, Inspection plate; 76, Second sliding component; 761, Sliding cylinder; 762, Push head; 8, Unloading station; 81, Qualified product channel; 82, Defective product channel; 83, Unloading rack; 84, Unloading nozzle; 9, Adjustment assembly; 91, Horizontal slide rail; 92, Vertical slide rail; 93, First adjusting component; 94, Second adjusting component; 95, Third adjusting component; 10, Sliding plate; 11, Adjusting cylinder. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a fully automatic optical sorting device for inspecting the quality of screw workpieces.

[0034] Reference Figure 1The fully automatic optical sorting equipment for screw workpiece quality inspection includes a frame 1, a transfer tray 2, a feeding mechanism 3, a straightness inspection station 4, an overall inspection station 5, a head inspection station 6, a screw thread inspection station 7, and a unloading station 8.

[0035] Reference Figure 1 The transfer disk 2 is rotatably mounted on the frame 1. The transfer disk 2 is used to drive the screw to transfer to different work positions. The edge of the transfer disk 2 is circumferentially spaced with multiple slots 21 for the screw rod to be inserted. In this embodiment, the transfer disk 2 includes a disk body and a servo motor. The disk body is rotatably mounted on the frame 1. The slots 21 are opened on the edge of the disk body. The servo motor is mounted on the frame 1. The output shaft of the servo motor is coaxially connected to the disk body. When the servo motor is started, the disk body can be driven to rotate, thereby driving the screw inserted in the slots 21 to move to different work positions.

[0036] Reference Figure 1 The feeding mechanism 3 is installed on the frame 1. The feeding mechanism 3 is used to feed the screw into the slot 21. In this embodiment, the feeding mechanism 3 includes a vibratory plate 31 and a feeding slide 32. The vibratory plate 31 is installed on the frame 1, and the feeding slide 32 is installed on the frame 1 at an angle downward. One end of the feeding slide 32 is connected to the discharge port of the vibratory plate 31, and the other end of the feeding slide 32 is connected to a slot 21 on the transfer plate 2. The feeding slide 32 is provided with a sliding bar hole for the rod part of the screw to be inserted.

[0037] The staff feeds multiple screws to be tested into the vibratory feeder 31. The vibratory feeder 31 vibrates the screws and feeds them onto the feeding slide 32. The shank of the screw is inserted into the sliding strip hole on the feeding slide 32, and the head of the screw abuts against the feeding slide 32. Under the action of gravity, the screw is fed into the slot 21 on the transfer plate 2. The head of the screw abuts against the transfer plate 2 near the slot 21, which supports the shank of the screw.

[0038] Reference Figure 1 , Figure 2The straightness detection station 4 is installed on the frame 1 behind the feeding mechanism 3 in the rotation direction of the transfer tray 2. The straightness detection station 4 is used to detect the straightness of the screw. The straightness detection station 4 includes a sleeve 41, a lifting member 42, a pressing member 43, and a pressure sensor. The sleeve 41 is vertically slidably installed on the frame 1 below the screw on the transfer tray 2. The sleeve 41 is hollow inside and open at the top. In this embodiment, the upper opening of the sleeve 41 gradually increases from away from the screw to near the screw, making it easy for the screw to be inserted. The lifting member 42 is installed on the frame 1 and is used to drive the sleeve 41 to rise and fit. In this embodiment, the lifting component 42 includes a first cylinder and a lifting plate. The first cylinder is vertically mounted on the frame 1, and the lifting plate is mounted on the piston rod of the first cylinder. The lifting plate is connected to the sleeve 41. In this embodiment, a sliding plate 10 is slidably mounted on the frame 1 in the direction of the axis of the transfer disk 2. An adjusting cylinder 11 for driving the sliding plate 10 to slide is mounted on the frame 1. The first cylinder is mounted on the sliding plate 10. Three sleeves 41 are detachably mounted on the lifting plate by bolts. The three sleeves 41 are distributed along the rotation direction of the transfer disk 2. The three sleeves 41 are respectively located below the three screws. The inner diameters of the three sleeves 41 gradually decrease along the rotation direction of the transfer disk 2. This allows the operator to easily move the three sleeves 41 out of the frame 1 by adjusting the cylinder 11 to drive the sliding plate 10 when inspecting screws of different sizes. The sleeves 41 can then be easily replaced, making their inner diameter suitable for screws of different sizes and improving the applicability of straightness testing for screws of different sizes. The clamping member 43 is mounted on the frame 1 and is used to clamp the head of the screw onto the transfer disk 2. In this embodiment, the clamping member 43 includes a second cylinder 431, a clamping plate 432, and a pin. A shaft 433 and a telescopic spring 434 are mounted on the machine frame 1. A second cylinder 431 is vertically mounted on the frame 1. A pressure plate 432 is mounted on the piston rod of the second cylinder 431. The pressure plate 432 is located above the heads of the three screws. A pin 433 slides through the pressure plate 432 and is used to abut against the heads of the screws. A telescopic spring 434 is mounted on the pin 433 and connected to the pressure plate 432. A pressure sensor is mounted on the pressure plate 432 and is located above the pin 433 passing through the pressure plate 432. The pressure sensor is used to abut against the pin 433 to detect the pressure applied to the pressure member 43 by the screws.

[0039] The transfer disk 2 drives the screws to move, positioning the three screws above the three sleeves 41 respectively. Then, the piston rod of the second cylinder 431 extends, causing the pressure plate 432 to drive the pin 433 to press the head of the screw onto the transfer disk 2. The lifting member 42 then drives the sleeve 41 to rise, allowing the screw to be inserted into the sleeve 41 through its upper opening. If the screw is fully inserted into the sleeve 41, the pressure applied by the sleeve 41 to the screw and transmitted to the pin 433 remains stable. The pressure detected by the pressure sensor is within the acceptable range, and the straightness of the screw is acceptable. If the straightness of the screw is not up to standard, the screw will abut against the side wall of the sleeve 41. The force of the lifting member 42 driving the sleeve 41 to rise will be transmitted to the screw. The pressure transmitted from the screw to the pin 433 increases, and the pin 433 moves upward and squeezes the pressure sensor. If the pressure detected by the pressure sensor exceeds the qualified range, the straightness of the screw is not up to standard. This method can conveniently detect the straightness of the screw. Furthermore, by using three sleeves 41 with successively decreasing inner diameters along the rotation direction of the transfer disk 2, the screw can be tested multiple times, which improves the accuracy of the straightness detection.

[0040] Reference Figure 1 , Figure 3 The overall inspection station 5 is installed on the frame 1 behind the straightness inspection station 4 in the rotation direction of the transfer tray 2. The overall inspection station 5 is used to inspect the length and diameter of the screw. The overall inspection station 5 includes a first inspection camera module 51, a second inspection camera module 52, an illumination lamp 53, and a positioning component 54. An adjustment component 9 is installed on the frame 1. The adjustment component 9 is used to adjust the position of the first inspection camera module 51 and the second inspection camera module 52. The adjustment component 9 includes a horizontal slide rail 91, a vertical slide rail 92, a first adjustment component 93, a second adjustment component 94, and a third adjustment component 95. The horizontal slide rail 91 slides horizontally. Mounted on frame 1, vertical slide rail 92 is slidably mounted on horizontal slide rail 91. First detection camera module 51 and second detection camera module 52 are both vertically slidably mounted on vertical slide rail 92. First adjusting member 93 is mounted on frame 1 and is used to drive vertical slide rail 92 to slide. Second adjusting member 94 is mounted on frame 1 and is used to drive first detection camera module 51 to slide. Third adjusting member 95 is mounted on frame 1 and is used to drive second detection camera module 52 to slide. In this embodiment, first adjusting member 93, second adjusting member 94 and third adjusting member 95 are all cylinders.

[0041] When faced with different photo-taking and inspection requirements, the staff can use the first adjusting component 93 to drive the vertical slide rail 92 to slide on the horizontal slide rail 91. The vertical slide rail 92 can then move the first inspection camera module 51 and the second inspection camera module 52 closer to or further away from the transfer disk 2. The second adjusting component 94 drives the first inspection camera module 51 to slide vertically, and the third adjusting component 95 drives the second inspection camera module 52 to slide vertically. This allows for adjustment of the height and spacing of the first inspection camera module 51 and the second inspection camera module 52, thereby adjusting their positions and improving their applicability to different inspection requirements.

[0042] Reference Figure 1 , Figure 3 An illumination lamp 53 is mounted on the frame 1. The illumination lamp 53 is used to provide illumination for the screw of the first detection camera module 51 and the second detection camera module 52 to take pictures. A positioning component 54 is mounted on the frame 1. The positioning component 54 is used to position the screw on the frame 1. The positioning component 54 includes a pressure block 541 and a control component 542. Two pressure blocks 541 are slidably mounted on the frame 1 facing each other. The two pressure blocks 541 are located at the upper and lower ends of the screw, respectively. The control component 542 is mounted on the frame 1. The control component 542 is used to drive the two pressure blocks 541 to move closer or further apart. In this embodiment, the control component 542 includes a double-headed cylinder. The two piston rods of the double-headed cylinder are connected to the two pressure blocks 541 one by one.

[0043] After the transfer plate 2 moves the screw between the two pressure blocks 541, the control unit 542 drives the two pressure blocks 541 to move closer to each other. The two pressure blocks 541 can then abut against the two ends of the screw respectively, positioning the screw and improving its stability. The lighting lamp 53 provides illumination to the screw. The first detection camera module 51 accurately takes pictures of the head of the positioned screw to detect the length and diameter of the screw head. The second detection camera module 52 accurately takes pictures of the shank of the screw to detect the length and diameter of the threaded section and the support section of the shank, thus facilitating the detection of the screw's length and diameter.

[0044] Reference Figure 1 , Figure 3 , Figure 4The head inspection station 6 is installed on the frame 1 behind the overall inspection station 5 in the rotation direction of the transfer tray 2. The head inspection station 6 is used to inspect the head of the screw. The head inspection station 6 includes a light source 61, a third inspection camera module 62, and a clamping assembly 63. The light source 61 is installed on the frame 1 and is used to illuminate the head of the screw. The third inspection camera module 62 is installed on the frame 1 and is used to inspect the appearance and size of the screw head. The clamping assembly 63 is installed on the frame 1 and is used to position the screw. The clamping assembly 63 includes a fixed plate 631, a clamping plate 632, and a linkage 633. The fixed plate 631 is installed on the frame 1, and the clamping plate 632 is used to position the screw. The clamping plate 632 is slidably mounted on the frame 1 towards the fixed plate 631. The clamping plate 632 and the fixed plate 631 are located on both sides of the axis of the screw. The linkage 633 is mounted on the frame 1. The linkage 633 is used to drive the clamping plate 632 closer to the fixed plate 631 when the pressure block 541 clamps the screw. The linkage 633 includes a guide rod 6331, a first wedge 6332, a linkage rod 6333, and a second wedge 6334. The guide rod 6331 is mounted on the pressure block 541 that abuts the bottom of the screw. The guide rod 6331 is slidably embedded in the inclined surface of the first wedge 6332 through rollers. The first wedge 6332 is slidably mounted on the frame 1 and is used to move towards the second wedge 6334 when the guide rod 6331 moves upward. The linkage rod 6333 is mounted on the first wedge 6332. The linkage rod 6333 slides against the inclined surface of the second wedge 6334 via rollers. The second wedge 6334 is slidably mounted on the frame 1. The second wedge 6334 is used to drive the clamping plate 632 to move towards the fixed plate 631 when the linkage rod 6333 moves away from the guide rod 6331. In this embodiment, a control spring is mounted on the second wedge 6334. The control spring is connected to the frame 1. The control spring always has the tendency to drive the second wedge 6334 to move the clamping plate 632 towards the fixed plate 631, so that the second wedge 6334 moves towards the fixed plate 631 under the action of the linkage rod 6333. After moving away from the guide rod 6331, the control spring can drive the clamping plate 632 closer to the fixed plate 631. When the second wedge 6334 moves towards the guide rod 6331 under the action of the linkage rod 6333, the linkage rod 6333 can abut against the inclined surface of the second wedge 6334, causing the second wedge 6334 to drive the clamping plate 632 away from the fixed plate 631. The clamping plate 632 is installed on the second wedge 6334. In this embodiment, the clamping plate 632 is slidably installed on the second wedge 6334 towards the fixed plate 631. A buffer spring is installed between the clamping plate 632 and the fixed plate 631 to reduce the possibility of damage to the screw due to excessive force when the clamping plate 632 drives the screw to press against the fixed plate 631.

[0045] The transfer plate 2 moves the screw to the position of the third detection camera module 62. When the pressure block 541 of the previous station moves to clamp the screw, the pressure block 541 moves the guide rod 6331. The guide rod 6331 drives the first wedge 6332 to move toward the second wedge 6334. The first wedge 6332 drives the linkage rod 6333 to move away from the guide rod 6331. The linkage rod 6333 drives the second wedge 6334 to move away from the guide rod 6331. The control spring drives the clamping plate 632 to approach the fixed plate 631. The clamping plate 632 and the fixed plate 631 can clamp and position the screw, improving the stability of the screw. Then, the light source 61 illuminates the screw, and the third inspection camera module 62 can take pictures of the head of the screw, thereby conveniently inspecting the appearance and size of the screw head. When the pressure block 541 moves down to release the screw, the pressure block 541 drives the guide rod 6331, the first wedge 6332 and the second wedge 6334 to move in opposite directions. The second wedge 6334 can then drive the clamping plate 632 away from the fixed plate 631 to release the screw, improving the synchronization of the screw being positioned and released at the overall inspection station 5 and the head inspection station 6, reducing the drive source required to position the screw at the overall inspection station 5 and the head inspection station 6, and ensuring the normal rotation of the transfer disk 2.

[0046] Reference Figure 1 , Figure 5The thread inspection station 7 is installed on the frame 1 behind the head inspection station 6 in the rotation direction of the transfer tray 2. The thread inspection station 7 is used to inspect the threads of the screw. The thread inspection station 7 includes an inspection seat 71, a screw head 72, a first sliding member 73, a screwing member 74, an inspection plate 75, and a second sliding member 76. The inspection seat 71 is slidably installed on the frame 1 above the screw head. The screw head 72 is rotatably installed on the side of the inspection seat 71 near the screw head. The lower end has a regular hexagonal groove for fitting onto the hexagonal head of the screw. The opening of the regular hexagonal groove on the screw head 72 gradually decreases from near the screw to far away from the screw, making it easy for the screw head 72 to fit onto the head of the screw. The first sliding member 73 is mounted on the frame 1 and is used to drive the detection seat 71 to slide. The screwing member 74 is mounted on the detection seat 71 and is used to drive the screw head 72 to rotate. In this embodiment, the first sliding member 73 is a cylinder, which is vertically mounted on the frame 1 and the piston rod of the cylinder is connected to the detection seat 71. The screwing member 74 is a servo motor, which is mounted on the detection seat 71 and the piston rod of the servo motor is coaxially connected to the screw head 72. The detection plate 75 is slidably mounted on the frame 1 facing the screw head 72. The screw head 72 and the detection plate 75 are located at the upper and lower ends of the screw, respectively. The detection plate 75 has a threaded hole, the diameter of which gradually decreases from near the screw to far away from the screw. The threaded hole is used for screwing in the threaded section at the bottom of the screw. The second sliding member 76 is mounted on the frame 1. The second sliding member 76 is used to drive the detection plate 75 to move. The second sliding member 76 includes a sliding cylinder 761 and a pusher 762. The sliding cylinder 761 is vertically mounted on the frame 1. The piston rod of the sliding cylinder 761 slides vertically through the detection plate 75. The pusher 762 is mounted on the piston rod of the sliding cylinder 761. The pusher 762 is used to abut against the bottom of the detection plate 75.

[0047] The transfer disc 2 moves the screw to below the detection seat 71. The first sliding member 73 drives the detection seat 71 to move the screw head 72 closer to the head of the screw. The screw head 72 can then be fitted onto the head of the screw. Then, the piston rod of the sliding cylinder 761 extends, causing the push head 762 to abut against the bottom of the detection plate 75. As the piston rod of the sliding cylinder 761 extends, the push head 762 drives the detection plate 75 to move upward, and the threaded section at the bottom of the screw abuts against the detection plate 75. On the threaded hole, the screwing member 74 drives the screwing head 72 to rotate, which in turn drives the screw to rotate. If the threaded section of the screw is qualified, the threaded section of the screw can drive the detection plate 75 to continue to move upward. The detection plate 75 separates from the pusher head 762, which facilitates the detection of the screw thread. After the detection is completed, the screwing member 74 drives the screwing head 72 to reverse, and the screw can drive the detection plate 75 to move downward and re-abut against the pusher head 762 for reset. At the same time, the threaded section of the screw disengages from the threaded hole.

[0048] Reference Figure 1 The unloading station 8 is installed on the frame 1 behind the thread inspection station 7 in the rotation direction of the transfer plate 2. The unloading station 8 is used to drive the screw to unload materials from the transfer plate 2. In this embodiment, the unloading station 8 includes a qualified product channel 81, a defective product channel 82, an unloading rack 83, and unloading nozzles 84. The qualified product channel 81 is installed at an angle downward on the frame 1 behind the thread inspection station 7 in the rotation direction of the transfer plate 2. The qualified product channel 81 is connected to the slot 21. The defective product channel 82 is installed at an angle downward on the frame 1 behind the qualified product channel 81 in the rotation direction of the transfer plate 2. The defective product channel 82 is connected to the slot 21. The unloading rack 83 is installed on the frame 1 and extends above the transfer plate 2. Two unloading nozzles 84 are installed on the unloading rack 83. The two unloading nozzles 84 are respectively aligned with the slot 21 above the qualified product channel and the defective product channel 82.

[0049] The transfer tray 2 transports the inspected screw to the qualified product channel 81. If the multi-dimensional parameters of the screw are qualified, the discharge nozzle 84 blows air to blow the screw out of the slot 21 to the qualified product channel 81. Then the qualified screw is output from the qualified product channel 81. If one of the parameters of the screw is unqualified, the transfer tray 2 continues to transport the screw to the defective product channel 82. Another discharge nozzle 84 blows air to blow the unqualified screw into the defective product channel 82. The unqualified screw is output from the defective product channel 82.

[0050] The implementation principle of a fully automatic optical sorting device for screw workpiece quality inspection according to an embodiment of this application is as follows: The feeding mechanism 3 feeds multiple screws to be inspected sequentially into multiple slots 21 opened on the edge of the transfer disk 2. The head of the screw with a diameter larger than the diameter of the slot 21 abuts against the transfer disk 2. Then the transfer disk 2 rotates, and the feeding mechanism 3 feeds the next screw into the next slot 21. At the same time, as the transfer disk 2 rotates, it drives multiple screws to move, so that multiple screws on the transfer disk 2 move to the next station for transfer. The straightness detection station 4 detects the straightness of the screw, the overall detection station 5 detects the length and diameter of the screw, the head detection station 6 detects the head of the screw, and the thread detection station 7 detects the thread of the screw. In this way, the parameters of straightness, length, diameter, head, and thread of the screw are detected, reducing the impact of manual inspection on the efficiency of screw inspection, improving the connection efficiency of screw inspection of different parameters, and thus improving the efficiency of screw workpiece quality inspection.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A full-automatic optical sorting device for screw workpiece quality detection, characterized in that: The machine includes a frame (1), a transfer tray (2), a feeding mechanism (3), a straightness inspection station (4), an overall inspection station (5), a head inspection station (6), a thread inspection station (7), and a unloading station (8). The transfer tray (2) is rotatably mounted on the frame (1) and is used to drive the screw to transfer to different stations. The edge of the transfer tray (2) is circumferentially spaced with multiple slots (21) for the screw rod to be inserted. The feeding mechanism (3) is mounted on the frame (1) and is used to feed the screw into the slots (21). Inside the machine, the straightness detection station (4) is set on the frame (1) and is used to detect the straightness of the screw. The overall detection station (5) is set on the frame (1) and is used to detect the length and diameter of the screw. The head detection station (6) is set on the frame (1) and is used to detect the head of the screw. The thread detection station (7) is set on the frame (1) and is used to detect the thread of the screw. The unloading station (8) is set on the frame (1) and is used to drive the screw to unload from the transfer plate (2). ​ 2. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 1, characterized in that: The straightness detection station (4) includes a sleeve (41), a lifting member (42), a pressing member (43), and a pressure sensor. The sleeve (41) is slidably mounted on the frame (1). The lifting member (42) is mounted on the frame (1) and is used to drive the sleeve (41) to rise and be fitted onto the screw. The pressing member (43) is mounted on the frame (1) and is used to press the head of the screw onto the transfer plate (2). The pressure sensor is mounted on the pressing member (43) and is used to detect the pressure applied by the screw to the pressing member (43).

3. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 1, characterized in that: The overall inspection station (5) includes a first inspection camera module (51), a second inspection camera module (52), an illumination lamp (53), and a positioning component (54). The first inspection camera module (51) is mounted on the frame (1) and is used to inspect the length and diameter of the head of the screw. The second inspection camera module (52) is mounted on the frame (1) and is used to inspect the length and diameter of the shank of the screw. The illumination lamp (53) is mounted on the frame (1) and is used to provide illumination. The positioning component (54) is mounted on the frame (1) and is used to position the screw on the frame (1).

4. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 3, characterized in that: The positioning component (54) includes a pressure block (541) and a control component (542). Two pressure blocks (541) are slidably arranged facing each other on the frame (1). The two pressure blocks (541) are located at the two ends of the screw respectively. The control component (542) is arranged on the frame (1) and is used to drive the two pressure blocks (541) to move closer or further apart from each other.

5. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 3, characterized in that: The frame (1) is provided with an adjustment component (9) for adjusting the position of the first detection camera module (51) and the second detection camera module (52). The adjustment component (9) includes a horizontal slide rail (91), a vertical slide rail (92), a first adjustment member (93), a second adjustment member (94), and a third adjustment member (95). The horizontal slide rail (91) is provided on the frame (1), and the vertical slide rail (92) is slidably provided on the horizontal slide rail (91). The first adjustment member (93) is provided on the frame (1) and is used to drive the vertical slide rail (92) to slide. The first detection camera module (51) and the second detection camera module (52) are both slidably provided on the vertical slide rail (92). The second adjustment member (94) is provided on the frame (1) and is used to drive the first detection camera module (51) to slide. The third adjustment member (95) is provided on the frame (1) and is used to drive the second detection camera module (52) to slide.

6. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 4, characterized in that: The head inspection station (6) includes a light source (61), a third inspection camera module (62), and a clamping assembly (63). The light source (61) is mounted on the frame (1) and is used to illuminate the head of the screw. The third inspection camera module (62) is mounted on the frame (1) and is used to inspect the appearance and size of the screw head. The clamping assembly (63) is mounted on the frame (1) and is used to position the screw.

7. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 6, characterized in that: The clamping assembly (63) includes a fixed plate (631), a clamping plate (632), and a linkage (633). The fixed plate (631) is mounted on the frame (1) and is used to abut against the screw. The clamping plate (632) is slidably mounted on the frame (1) toward the fixed plate (631). The linkage (633) is mounted on the frame (1) and is used to drive the clamping plate (632) to move when the pressure block (541) moves.

8. The fully automatic optical sorting device for screw workpiece quality inspection according to claim 7, characterized in that: The linkage component (633) includes a guide rod (6331), a first wedge (6332), a linkage rod (6333), and a second wedge (6334). The guide rod (6331) is disposed on a pressure block (541) abutting the bottom of the screw and is slidably connected to the first wedge (6332). The first wedge (6332) is slidably disposed on the frame (1) and is used to move toward the second wedge (6334) when the guide rod (6331) moves upward. The linkage rod (6333) is disposed on the first wedge (6332) and is slidably connected to the second wedge (6334). The second wedge (6334) is slidably disposed on the frame (1) and is used to drive the clamping plate (632) to move toward the fixed plate (631) when the linkage rod (6333) moves toward the direction away from the guide rod (6331). The clamping plate (632) is disposed on the second wedge (6334).

9. The fully automatic optical sorting device for inspecting the quality of screw workpieces according to claim 1, characterized in that: The thread inspection station (7) includes an inspection seat (71), a screw head (72), a first sliding member (73), a screwing member (74), an inspection plate (75), and a second sliding member (76). The inspection seat (71) is slidably mounted on the frame (1). The screw head (72) is rotatably mounted on the inspection seat (71) and is used to fit onto the head of the screw. The first sliding member (73) is mounted on the frame (1) and is used to drive the inspection seat (71) to slide. The screwing member (74) is mounted on the inspection seat (71) and is used to drive the screw head (72) to rotate. The inspection plate (75) is slidably mounted on the frame (1). The inspection plate (75) has a threaded hole for the threaded section at the bottom of the screw to be screwed in. The second sliding member (76) is mounted on the frame (1) and is used to drive the inspection plate (75) to move.

10. A fully automatic optical sorting device for inspecting the quality of screw workpieces according to claim 9, characterized in that: The second sliding component (76) includes a sliding cylinder (761) and a pusher (762). The sliding cylinder (761) is mounted on the frame (1). The piston rod of the sliding cylinder (761) slides through the detection plate (75). The pusher (762) is mounted on the piston rod of the sliding cylinder (761) and abuts against the bottom of the detection plate (75).

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