A screw sorting machine

Abstract

The utility model discloses a screw sorting machine, including rotation switching mechanism, rotation switching mechanism's periphery is provided with feeding mechanism, slip tooth detection mechanism, degumming cover mechanism, classification unloading mechanism these four processing mechanisms in proper order, rotation switching mechanism includes rotary table and the product placing seat of setting on the rotary table, and the product placing seat is used for the fixed placement of multiple screws on it, and the first, second, third, fourth station are provided with in proper order along the circumferential direction on the rotary table, and the first, second, third, fourth station correspond with feeding mechanism, slip tooth detection mechanism, degumming cover mechanism, classification unloading mechanism respectively, and the rotary table is used for driving the screw on the product placing seat and rotates to switch to different station to supply corresponding processing mechanism to process. The utility model has realized the mechanical automation sorting of aircraft screw, is more time -saving and labor -saving, and the work efficiency is high, and the error rate is lower, can satisfy the efficient production assembly requirement.

Description

Technical Field

[0001] This utility model relates to the field of screw sorting technology, specifically to a screw sorting machine. Background Technology

[0002] In industrial production, screws of various lengths and sizes are often used for assembly. Due to various reasons, screws of different lengths and qualities are often mixed together. Currently, the classification of screws of different lengths and qualities is still done by visual inspection and manual sorting. First, the quality of the screws is screened out by visually inspecting the stripped threads on the screw ends. Then, the screws are manually decapped. Next, the length of all screws without caps is visually inspected. Finally, the quality-compliant screws of different lengths are classified. This classification method is time-consuming, labor-intensive, inefficient, and has a high error rate, making it difficult to meet the requirements of efficient production assembly. Utility Model Content

[0003] The present invention aims to provide a screw sorting machine to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a screw sorting machine, including a rotary switching mechanism, and four processing mechanisms are arranged in sequence around the rotary switching mechanism: a feeding mechanism, a stripped thread detection mechanism, a de-sleeving mechanism, and a sorting and unloading mechanism.

[0005] The rotary switching mechanism includes a rotary table and a product placement seat set on the rotary table. The product placement seat is used to fix multiple screws on it. The rotary table is arranged with a first, second, third and fourth workstations in sequence along the circumference. The first, second, third and fourth workstations correspond to the feeding mechanism, the stripped thread detection mechanism, the debonding mechanism and the sorting and unloading mechanism, respectively. The rotary table is used to drive the screws on the product placement seat to rotate to switch to different workstations for processing by the corresponding processing mechanism.

[0006] Preferably, there are four product placement seats, which are respectively located at the front, right, rear, and left side of the rotary table, and the positions of the four product placement seats correspond to the first, second, third, and fourth workstations, respectively.

[0007] Preferably, the feeding mechanism includes a feeding bin, a vibratory feeder, and a feeding robot arranged in sequence. A screw recognition camera is installed above the vibratory feeder. The feeding bin is used to transport screws into the vibratory feeder. The screw recognition camera is used to identify and locate the screws on the vibratory feeder. The feeding robot is used to clamp and transport the screws in the vibratory feeder to the product placement seat at the first station.

[0008] Preferably, the loading robot includes a loading frame, a first sliding drive, a second sliding drive, a third sliding drive, and a rotating picking head. The first sliding drive is fixedly mounted on the loading frame, the second sliding drive slides back and forth on the first sliding drive, the third sliding drive slides left and right on the second sliding drive, and the rotating picking head slides down on the third sliding drive.

[0009] Preferably, a push rod assembly is provided above the rotary table. The push rod assembly is used to push multiple screws of the product placement seat on the second station to the right to achieve side-by-side alignment. A pressing and fixing mechanism is provided above the product placement seat on the second station. The pressing and fixing mechanism moves downward to press and fix the screws on the product placement seat.

[0010] Preferably, the stripped thread detection mechanism is located on the right side of the product placement seat on the second station. The stripped thread detection mechanism includes a fourth sliding drive component and an infrared ring light source and a black and white camera mounted on the fourth sliding drive component. The fourth sliding drive component drives the infrared ring light source and the black and white camera to move back and forth together to sequentially detect the stripped threads of the screws on the product placement seat on the second station.

[0011] Preferably, the sleeve removal mechanism includes a rotary manipulator and a front clamping unit, a sleeve removal unit, and a rear clamping unit arranged sequentially from front to back below the rotary manipulator. The space between the front clamping unit and the rear clamping unit is the sleeve removal area. The rotary manipulator is used to move the screws of the product placement seat on the third station to the sleeve removal area and simultaneously move the screws of the sleeve removal area to the product placement seat on the third station. The front clamping unit and the rear clamping unit move towards each other to clamp the screws in the sleeve removal area. The sleeve removal unit includes a fifth sliding drive and a lifting gripper that can slide back and forth on the fifth sliding drive. The fifth sliding drive and the lifting gripper cooperate to remove the sleeves from the screws in the sleeve removal area.

[0012] Preferably, the rotary manipulator includes a fixed frame, a sixth sliding drive component that slides left and right on the fixed frame, a rotary drive component that rotates back and forth on the sliding drive component, and grippers that are respectively disposed at the front and rear ends of the rotary drive component and are liftable. Preferably, the front end clamping unit includes a rear push cylinder and a rotary screwdriver that are driven together. The rear push cylinder drives the rotary screwdriver to move backward, and the rotary screwdriver is used to clamp and engage with the thread groove of the screw head in the cap removal area and drive the screw to rotate. The rear end clamping unit includes a front push cylinder and a push rod that are driven together. The front push cylinder drives the push rod to move forward so that the push rod clamps and engages with the tail of the screw in the cap removal area.

[0013] Preferably, the sorting and unloading mechanism includes an unloading assembly line and an unloading robot, a length vision recognition component, and an unloading collection component arranged sequentially along the conveying direction of the unloading assembly line. The unloading robot is used to grab the screws from the product placement seat at the fourth station and rotate them 90° to place them upright on the unloading assembly line. The length vision recognition component is used to identify and classify the length specifications of the screws on the assembly line. The unloading collection component includes multiple blowing unloading components and collection boxes respectively arranged on opposite sides of the unloading assembly line. The blowing unloading components are used to blow screws of different length specifications on the unloading assembly line to sort them into different collection boxes and count them.

[0014] This utility model has the following beneficial effects:

[0015] This invention automates the sorting of screws of different qualities and lengths. After cleaning and drying, screws are fed to a product placement seat at the first station via a feeding mechanism. A rotating table moves the product placement seat and screws together to a second station. A stripping detection mechanism then checks the screws at the second station for stripping, removing defective screws and selecting qualified screws. The screws at the second station then rotate to a third station, where a sleeve removal mechanism removes the sleeves, reducing jamming frequency. The screws at the third station then rotate to a fourth station, where a sorting and unloading mechanism performs multi-angle visual inspection to identify and classify the screws according to their length specifications. Finally, qualified screws are sorted and counted according to their length specifications. This sorting method achieves automated mechanical sorting of aircraft screws, saving time and labor, increasing efficiency, and reducing the error rate, thus meeting the requirements of high-efficiency production assembly. Attached Figure Description

[0016] Figure 1 This is a top view of an embodiment of the present invention.

[0017] Figure 2 This is a structural schematic diagram of an embodiment of the present invention at one angle.

[0018] Figure 3 This is a structural schematic diagram of an embodiment of the present invention from another angle.

[0019] Figure 4 This is a structural schematic diagram of an embodiment of the present invention from another angle.

[0020] Figure 5 This is a rear view of the debonding sleeve mechanism according to an embodiment of the present invention.

[0021] Figure 6 This is a front view of the debonding sleeve mechanism according to an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the length visual recognition component according to an embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the cooperation between the loading robot and the vibratory feeder in an embodiment of this utility model.

[0024] Figure 9 This is a schematic diagram showing the cooperation between the rotation switching mechanism and the pressing and fixing mechanism in an embodiment of this utility model.

[0025] Attached diagram labels: 1. Machine base; 2. Control module; 3. Operation display screen; 4. Rotary switching mechanism; 41. Rotary table; 42. Product placement seat; 5. Feeding mechanism; 51. Feeding bin; 52. Vibratory feeder; 53. Feeding robot; 531. Feeding rack; 532. First sliding drive; 533. Second sliding drive; 534. Third sliding drive; 535. Rotary picking head; 54. Screw recognition camera; 6. Stripped thread detection mechanism; 61. Fourth sliding drive; 62. Infrared ring light source; 63. Black and white camera; 7. Glue removal mechanism; 71. Rotary robot; 711. Fixing. Frame, 712 Sixth sliding drive, 713 Rotary drive, 714 Gripper, 72 Front end clamping unit, 721 Rear push cylinder, 722 Rotary screwdriver, 73 Debonding sleeve unit, 731 Fifth sliding drive, 732 Lifting gripper, 74 Rear end clamping unit, 741 Front push cylinder, 742 Push rod, 8 Classification unloading mechanism, 81 Unloading assembly line, 82 Unloading robot, 83 Length vision recognition component, 84 Blowing unloading component, 85 Collection box, 9 Push rod assembly, 91 Push rod cylinder, 92 Push rod body, 10 Pressing and fixing mechanism. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] See Figure 1-9 As shown in the figure, as an embodiment of the present utility model, a screw sorting machine is provided, specifically an aircraft screw sorting machine, including a machine base 1 and a rotary switching mechanism 4, a control module 2 and an operation display screen 3 installed on the machine base 1. The rotary switching mechanism 4 is surrounded by four processing mechanisms in sequence: a feeding mechanism 5, a stripped thread detection mechanism 6, a degumming mechanism 7, and a sorting and unloading mechanism 8. The operation display screen 3, the rotary switching mechanism 4 and each processing mechanism are electrically connected to the control module 2, and the operation and control of each mechanism are performed through the operation display screen 3.

[0030] The rotary switching mechanism 4 includes a rotary table 41 and product placement seats 42 disposed on the rotary table 41. The product placement seats 42 have multiple product placement slots for fixing multiple screws thereon. The rotary table 41 has four workstations arranged sequentially along its circumference. These workstations correspond to the feeding mechanism 5, the stripped thread detection mechanism 6, the descaling mechanism 7, and the sorting and unloading mechanism 8, respectively. The rotary table 41 drives the screws on the product placement seats 42 to rotate, switching them to different workstations for processing by the corresponding processing mechanisms. There are four product placement seats 42, located at the front, right, rear, and left sides of the rotary table 41, respectively. The positions of the four product placement seats 42 correspond to the first, second, third, and fourth workstations, allowing the four workstations and the four processing mechanisms (feeding mechanism 5, stripped thread detection mechanism 6, descaling mechanism 7, and sorting and unloading mechanism 8) to simultaneously process the screws at their respective workstations using different procedures, further improving processing efficiency.

[0031] This invention involves cleaning and drying screws of different qualities and lengths, then feeding them via a feeding mechanism 5 to a product placement seat 42 at the first station. A rotating table 41 rotates the product placement seat 42 and the screws together to a second station. A stripping detection mechanism 6 then checks for stripped threads, removing defective screws and selecting qualified screws. The screws then rotate to a third station, where a sleeve removal mechanism 7 removes the sleeves, reducing jamming frequency. The screws then rotate to a fourth station, where a sorting and unloading mechanism 8 performs multi-angle visual inspection to identify and classify the screws according to their length specifications. Finally, qualified screws are sorted and counted based on their length specifications. This sorting method achieves automated mechanical sorting of aircraft screws, saving time and labor, increasing efficiency, and reducing error rates, thus meeting the requirements of high-efficiency production and assembly.

[0032] The screw sorting machine of this invention can process and sort screws with a length range of 8 to 80 mm.

[0033] In this embodiment, the feeding mechanism 5 includes a feeding bin 51, a vibrating plate 52, and a feeding robot 53 arranged in sequence. A screw recognition camera 54 is arranged above the vibrating plate 52. The feeding bin 51 is used to transport screws into the vibrating plate 52. The screw recognition camera 54 is used to identify and locate the screws on the vibrating plate 52. The feeding robot 53 is used to pick up and transport the screws in the vibrating plate 52 to the product placement seat 42 of the first station.

[0034] In this embodiment, the loading robot 53 includes a loading frame 531, a first sliding drive 532, a second sliding drive 533, a third sliding drive 534, and a rotating pick-up head 535. The first sliding drive 532 is fixedly mounted on the loading frame 531. The second sliding drive 533 slides back and forth on the first sliding drive 532. The third sliding drive 534 slides left and right on the second sliding drive 533. The rotating pick-up head 535 slides up and down on the third sliding drive 534, thereby enabling the rotating pick-up head 535 to move in the up, down, left, right, forward and backward directions, as well as rotate horizontally, so as to accurately and stably pick up and transport the screws in the vibrating plate 52 to the product placement seat 42 of the first station.

[0035] In this embodiment, a push rod assembly 9 is provided above the rotary table 41. The push rod assembly 9 includes a push rod cylinder 91 and a push rod body 92 that are connected by a drive. The push rod cylinder 91 pushes the push rod body 92 to the right, thereby pushing multiple screws on the product placement seat 42 at the second station to achieve side-by-side alignment. A pressing and fixing mechanism 10 is provided above the product placement seat 42 at the second station. The pressing and fixing mechanism 10 moves downward to press and fix the screws on the product placement seat 42, ensuring the stability of the screws on the second station, thereby ensuring the stable operation of the stripped thread detection mechanism 6.

[0036] In this embodiment, the stripped screw detection mechanism 6 is located on the right side of the product placement seat 42 at the second station. The stripped screw detection mechanism 6 includes a fourth sliding drive 61 and an infrared ring light source 62 and a five-megapixel black and white camera 63 mounted on the fourth sliding drive 61. The fourth sliding drive 61 drives the infrared ring light source 62 and the black and white camera 63 to move back and forth together to sequentially detect the stripped screws of the product placement seat 42 at the second station.

[0037] In this embodiment, the rubber sleeve removal mechanism 7 includes a rotary manipulator 71 and a front clamping unit 72, a rubber sleeve removal unit 73, and a rear clamping unit 74 arranged sequentially from front to back below the rotary manipulator 71. The space between the front clamping unit 72 and the rear clamping unit 74 is the rubber cap removal area. The rotary manipulator 71 is used to move the screws of the product placement seat 42 on the third station to the rubber cap removal area and at the same time move the screws of the rubber cap removal area to the product placement seat 42 on the third station. The front clamping unit 72 and the rear clamping unit 74 move towards each other to clamp the screws in the rubber cap removal area. The rubber sleeve removal unit 73 includes a fifth sliding drive member 731 and a lifting gripper 732 that can slide back and forth on the fifth sliding drive member 731. The fifth sliding drive member 731 and the lifting gripper 732 cooperate to remove the rubber sleeve from the screws in the rubber cap removal area.

[0038] Specifically, the rotary manipulator 71 includes a fixed frame 711, a sixth sliding drive component 712 that slides left and right on the fixed frame 711, a rotary drive component 713 that rotates forward and backward on the sliding drive component, and grippers 714 that are respectively disposed at the front and rear ends of the rotary drive component 713 and are liftable.

[0039] The sixth sliding drive component 712 drives the gripper 714 to slide left and right to adjust its position. The rotation drive component 713 rotates 180° to move the screws of the product placement seat 42 on the third station to the debonded area, and at the same time move the screws in the debonded area to the product placement seat 42 on the third station.

[0040] Specifically, the front clamping unit 72 includes a rear push cylinder 721 and a rotary screwdriver 722 connected to the drive. The rotary screwdriver 722 includes a rotary motor and a screwdriver connected to the drive. The rear push cylinder 721 drives the rotary screwdriver 722 to move backward. The rotary screwdriver 722 is used to clamp and engage with the thread groove of the screw head in the cap removal area and drive the screw to rotate. The rear clamping unit 74 includes a front push cylinder 741 and a push rod 742 connected to the drive. The front push cylinder 741 drives the push rod 742 to move forward so that the push rod 742 clamps and engages with the tail of the screw in the cap removal area. Then, the lifting jaw 732 clamps the cap on the rotating screw in the cap removal area and moves it backward, thereby completely removing the cap.

[0041] In this embodiment, the sorting and unloading mechanism 8 includes an unloading assembly line 81 and an unloading robot 82, a length vision recognition component 83, and an unloading collection component arranged sequentially along the conveying direction of the unloading assembly line 81. The unloading robot 82 is used to grab the screws on the product placement seat 42 at the fourth station and rotate them 90° to place them upright on the unloading assembly line 81. The length vision recognition component 83 includes multiple angle recognition cameras and is used to identify and classify the length specifications of the screws on the unloading assembly line 81. The unloading collection component includes multiple blowing unloading components 84 and collection boxes 85 respectively arranged on opposite sides of the unloading assembly line 81. The blowing unloading components 84 are used to blow screws of different length specifications on the unloading assembly line 81 to sort them into different collection boxes 85 and count them. The blowing and feeding component 84 uses air blowing to blow the screws into different collection boxes 85. It is also equipped with a pressure regulating device to adjust the input air pressure of the blowing and feeding component 84 to ensure the stability and reliability of the blowing and feeding.

[0042] In this embodiment, each sliding drive or rotary drive can adopt a cylinder or motor structure, which is the prior art and will not be described in detail here.

[0043] The specific workflow of this utility model is as follows:

[0044] 1. The screws are put into the feeding hopper 51. The feeding hopper 51 automatically discharges the screws and transports them in an orderly manner to the vibrating plate 52. The vibrating plate and the screw recognition camera 54 work together to achieve visual sorting. Then, the screws in the vibrating plate 52 are picked up and transported to the product placement seat 42 of the first station by multiple rotating picking heads 535 on the feeding robot 53, thus completing the screw feeding process.

[0045] 2. The rotary table 41 rotates 90°, causing the product placement seat 42 at the first station to rotate and enter the second station together with the screws. Then, the push rod cylinder 91 pushes the push rod body 92 to the right, thereby pushing the multiple screws on the product placement seat 42 at the second station to achieve side-by-side alignment. Then, the pressing and fixing mechanism 10 moves downward to press and fix the screws on the product placement seat 42. Then, the visual stripping detection mechanism 6 on the right slides back and forth to detect the stripping of the screws at the second station. It visually identifies feature points, judges the stripping condition of the screw end face, removes bad screws, and identifies and selects qualified screws, thus completing the screw stripping detection process.

[0046] 3. The rotary table 41 continues to rotate 90°, causing the product placement seat 42 at the second station to rotate together with the screw into the third station. The rotary robot arm 71 rotates 180° to transport the screw from the product placement seat 42 at the third station to the cap removal area. Then, the rear push cylinder 721 drives the rotary screwdriver 722 to move backward. The rotary screwdriver 722 aligns with the screw head groove in the cap removal area and rotates the screw. The front push cylinder 741 drives the push rod 742 to move forward, so that the push rod 742 aligns with the screw in the cap removal area. The tail end of the screw is pressed tightly together, fixing the direction and position of the screw. Then, the lifting gripper 732 rises to clamp the cap on the rotating screw in the cap removal area and moves backward under the drive of the fifth sliding drive 731, thus completely removing the cap and reducing the frequency of jamming. After removal, the lifting gripper 732 descends and moves forward to reset under the drive of the fifth sliding drive 731. Then, the rotating robot 71 rotates 180° to transport the screw in the cap removal area to the product placement seat 42 on the third station, thus completing the cap removal process.

[0047] 4. The rotary table 41 continues to rotate 90°, so that the product placement seat 42 of the third station rotates together with the screws and enters the fourth station. The unloading robot 82 grabs the screws from the product placement seat 42 of the fourth station and flips them 90° to place them upright on the unloading assembly line 81. The length vision recognition component 83 performs multi-angle visual detection, recognition and classification of the length specifications of the screws on the unloading assembly line 81. The blowing unloading component 84 corresponds one-to-one with the collection box 85. The blowing unloading component 84 blows the screws of different length specifications on the unloading assembly line 81 to sort them into different collection boxes 85 and count them, thereby completing the screw sorting process.

[0048] In summary, the screw sorting machine of this utility model achieves automated mechanical sorting, eliminating the need for manual sorting. The four workstations simultaneously perform corresponding processes, greatly improving work efficiency, saving time and labor, and achieving a high success rate of over 99% for the adhesive sleeve. The error rate is also low. In addition, it has a re-inspection function, and screws that fail to be removed from the sleeve will be placed in the recycling bin, which can meet the requirements of efficient production and assembly.

[0049] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A screw sorting machine, characterized in that: It includes a rotary switching mechanism, and four processing mechanisms are arranged in sequence around the rotary switching mechanism: a feeding mechanism, a stripping detection mechanism, a debonding mechanism, and a sorting and unloading mechanism. The rotary switching mechanism includes a rotary table and a product placement seat set on the rotary table. The product placement seat is used to fix multiple screws on it. The rotary table is arranged with a first, second, third and fourth workstations in sequence along the circumference. The first, second, third and fourth workstations correspond to the feeding mechanism, the stripped thread detection mechanism, the debonding mechanism and the sorting and unloading mechanism, respectively. The rotary table is used to drive the screws on the product placement seat to rotate to switch to different workstations for processing by the corresponding processing mechanism.

2. The screw sorting machine according to claim 1, characterized in that: There are four product placement seats, which are respectively located at the front, right, rear, and left side of the rotary table, and their positions correspond to the first, second, third, and fourth workstations, respectively.

3. The screw sorting machine according to claim 1, characterized in that: The feeding mechanism includes a feeding bin, a vibratory feeder, and a feeding robot arranged in sequence. A screw recognition camera is installed above the vibratory feeder. The feeding bin is used to transport screws into the vibratory feeder. The screw recognition camera is used to identify and locate the screws on the vibratory feeder. The feeding robot is used to clamp and transport the screws in the vibratory feeder to the product placement seat at the first workstation.

4. The screw sorting machine according to claim 1, characterized in that: The loading robot includes a loading frame, a first sliding drive, a second sliding drive, a third sliding drive, and a rotating picking head. The first sliding drive is fixedly installed on the loading frame. The second sliding drive slides back and forth on the first sliding drive. The third sliding drive slides left and right on the second sliding drive. The rotating picking head slides down on the third sliding drive.

5. The screw sorting machine according to claim 1, characterized in that: A push rod assembly is provided above the rotary table. The push rod assembly is used to push multiple screws of the product placement seat on the second station to the right to achieve side-by-side alignment. A pressing and fixing mechanism is provided above the product placement seat on the second station. The pressing and fixing mechanism moves downward to press and fix the screws on the product placement seat.

6. The screw sorting machine according to claim 1, characterized in that: The stripped thread detection mechanism is located on the right side of the product placement seat at the second station. The stripped thread detection mechanism includes a fourth sliding drive component and an infrared ring light source and a black and white camera mounted on the fourth sliding drive component. The fourth sliding drive component drives the infrared ring light source and the black and white camera to move back and forth together to sequentially detect the stripped threads of the screws on the product placement seat at the second station.

7. The screw sorting machine according to claim 1, characterized in that: The sleeve removal mechanism includes a rotary manipulator and a front clamping unit, a sleeve removal unit, and a rear clamping unit arranged sequentially from front to back below the rotary manipulator. The space between the front clamping unit and the rear clamping unit is the sleeve removal area. The rotary manipulator is used to move the screws of the product placement seat on the third station to the sleeve removal area and simultaneously move the screws of the sleeve removal area to the product placement seat on the third station. The front clamping unit and the rear clamping unit move towards each other to clamp the screws in the sleeve removal area. The sleeve removal unit includes a fifth sliding drive and a lifting gripper that can slide back and forth on the fifth sliding drive. The fifth sliding drive and the lifting gripper cooperate to remove the sleeves from the screws in the sleeve removal area.

8. The screw sorting machine according to claim 7, characterized in that: The rotary manipulator includes a fixed frame, a sixth sliding drive component that slides left and right on the fixed frame, a rotary drive component that rotates forward and backward on the sliding drive component, and grippers that are respectively located at the front and rear ends of the rotary drive component and can be raised and lowered.

9. The screw sorting machine according to claim 7, characterized in that: The front clamping unit includes a rear push cylinder and a rotary screwdriver connected to the drive. The rear push cylinder drives the rotary screwdriver to move backward. The rotary screwdriver is used to clamp and engage with the screw head groove in the area where the cap has come off, and to drive the screw to rotate. The rear clamping unit includes a front push cylinder and a push rod connected to the drive. The front push cylinder drives the push rod to move forward so that the push rod clamps and engages with the tail of the screw in the area where the cap has come off.

10. The screw sorting machine according to claim 1, characterized in that: The sorting and unloading mechanism includes an unloading assembly line and an unloading robot, a length vision recognition component, and an unloading collection component arranged sequentially along the conveying direction of the unloading assembly line. The unloading robot is used to grab the screws from the product placement seat at the fourth station and rotate them 90° to place them upright on the unloading assembly line. The length vision recognition component is used to identify and classify the length specifications of the screws on the assembly line. The unloading collection component includes multiple blowing unloading components and collection boxes respectively arranged on opposite sides of the unloading assembly line. The blowing unloading components are used to blow screws of different length specifications on the unloading assembly line to sort them into different collection boxes and count them.

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