A surface-colored fastener appearance color screening machine and its use method

Abstract

A surface color fastener appearance color screening machine and its use method belong to the field of visual inspection equipment. It includes a loading device, an intermittent feeding chute, an overhead roller conveyor, a detection device and a classification and collection device; the intermittent feeding chute is tilted, and its head end is higher than the tail end, the tail end of the loading device is located at the head end of the intermittent feeding chute, the tail end of the intermittent feeding chute is detachably fixedly connected to the upper end of the housing of the overhead roller conveyor, the dropout port of the intermittent feeding chute corresponds to the feed port of the overhead roller conveyor, a detection device is provided above the overhead roller conveyor, and the classification and collection device is installed at the end of the discharge side of the overhead roller conveyor. The present invention avoids secondary damage to the workpiece during the inspection process by adopting a continuous workpiece transportation method; the combined application of the overhead roller conveyor and the high-speed camera realizes all-round inspection of the appearance of the inspected workpiece, and can realize efficient inspection and screening of the appearance, color and surface quality of threaded fasteners.

Description

Technical Field

[0001] The invention belongs to the field of visual inspection equipment, and in particular relates to a surface-colored fastener appearance color screening machine and a use method thereof. Background Art

[0002] To maintain a consistent overall product appearance and enhance product aesthetics, major automotive manufacturers have recently placed increasing emphasis on color consistency in their fastener products, particularly for products such as blue anodized titanium alloys and sulfuric acid anodized aluminum alloys. However, significant color variation exists between batches. Currently, various standards do not clearly define product color. For example, the HB / Z347-2002 standard specifies a blue to violet color for the sulfuric acid anodized film on titanium alloys (i.e., blue anodized titanium alloys). However, when comparing similar products from multiple suppliers, significant color variations can be observed. Even within the same supplier, color variations can occur between batches. To ensure consistency, it is desirable to standardize the color of similar products and minimize color variation. To enhance customer satisfaction, effective color control and consistency across batches are essential.

[0003] At present, fastener manufacturers still mainly rely on visual inspection to inspect the appearance color of their products. However, the reliability of visual inspection is low because it is greatly affected by the subjective consciousness of the inspector and the lighting environment. It is impossible to conduct quantitative detection of the appearance color and determine the uniqueness of the standard, resulting in obvious differences in product appearance color between batches.

[0004] CCD inspection and screening machines currently available for fastener appearance inspection use vibration loading, which can cause secondary damage to the fastener surface. Fasteners are unstable during inspection, making them prone to tipping over. Furthermore, these machines are not universally applicable, requiring component replacement as needed to screen fasteners of varying specifications, making commissioning complex. In summary, current inspection methods struggle to meet the requirements for convenience, stability, and versatility when inspecting and screening the appearance of pigmented fasteners. Summary of the Invention

[0005] The purpose of the present invention is to provide a surface colored fastener appearance color screening machine and its use method to solve the problems that the existing inspection and screening method based on visual inspection has large errors, and the existing appearance inspection and screening machine is prone to damage the inspected workpiece, has weak universality and is difficult to ensure operational stability.

[0006] The present invention's surface-colored fastener appearance color screening machine utilizes machine vision technology to comprehensively inspect fastener appearance. By employing a reliable and versatile workpiece loading and transport method, the present invention significantly improves the stability and versatility of the inspection method. The continuous workpiece transport method prevents secondary damage to the workpiece during inspection. The combination of an overhead roller conveyor and a high-speed camera enables comprehensive inspection of the inspected workpiece's appearance, enabling efficient inspection and screening of the appearance, color, and surface quality of threaded fasteners.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] A surface color fastener appearance color screening machine includes a feeding device, an intermittent feeding slide, an overhead roller conveyor, a detection device and a classification and collection device;

[0009] The intermittent feeding chute is set at an angle, and its head end is higher than the tail end. The tail end of the loading device is located at the head end of the intermittent feeding chute. The tail end of the intermittent feeding chute is detachably fixedly connected to the upper end of the casing of the overhead roller conveyor. The drop-out port of the intermittent feeding chute corresponds to the feed port of the overhead roller conveyor. A detection device is provided above the overhead roller conveyor, and the classification and collection device is installed at the end of the discharge side of the overhead roller conveyor.

[0010] Furthermore, the intermittent feeding slide includes a feed slide, a feed slide support seat, a floating slide, a floating slide support seat, an intermediate slide, an intermediate slide support seat, a discharge slide, an eccentric wheel mechanism, an intermittent feeding slide frame, a base, a baffle, a locking bolt, a stop block, a stop block adjustment bolt and a support pillar;

[0011] The feed chute, floating chute, intermediate chute and discharge chute are arranged in sequence from the head end to the end end. The floating chute, floating chute support seat and the middle part of the intermediate chute support seat are all provided with chute grooves of the same width along their respective extension directions. The chute grooves of the floating chute and the floating chute support seat extend from the middle part of their own length direction to the end and are in a through-state in their own height direction. The chute of the intermediate chute support seat is in a through-state in its own length direction.

[0012] One end of the bottom surface of the intermittent feeding slide frame close to the overhead roller conveyor is hinged to one end of the top surface of the base close to the overhead roller conveyor, and a pillar is fixed to one end of the top surface of the base close to the loading device, and the end of the bottom surface of the intermittent feeding slide frame close to the loading device rests on the pillar;

[0013] The head end of the feed slide is aligned with the end of the loading device in the center, the feed slide is fixed on the feed slide support seat, and the feed slide support seat is fixed on the top surface of the intermittent feeding slide frame;

[0014] The floating slide is fixed on the floating slide support seat, the slide groove of the floating slide corresponds to the slide groove of the floating slide support seat, the floating slide support seat is fixedly connected to the eccentric wheel mechanism, and the eccentric wheel mechanism is fixed inside the intermittent feeding slide frame;

[0015] The head end of the middle slide is fixed on the middle slide support seat, and the middle slide support seat is fixed on the top surface of the intermittent feeding slide frame; the baffle is slidably arranged in the middle slide support seat and the sliding groove of the floating slide support seat, and the baffle is clamped and fixed on the middle slide support seat by a locking bolt;

[0016] The head end of the discharging chute is fixedly connected to the end of the middle chute, the end of the discharging chute is provided with the blanking port, and the end face of the end of the discharging chute is provided with a threaded hole, the stopper adjusting bolt is screwed into the threaded hole of the discharging chute, and the end of the stopper adjusting bolt is connected to the stopper through a rotating pair, and the stopper is set at the blanking port of the discharging chute.

[0017] Furthermore, the eccentric mechanism includes a DC motor, an eccentric, an eccentric bracket, a driven push rod, two guide posts and two compression springs;

[0018] The DC motor and the eccentric wheel bracket are both fixed inside the intermittent feeding slide frame, the output shaft of the DC motor rotates through the eccentric wheel bracket and is fixedly connected to the eccentric wheel, the lower end of the driven push rod contacts the bottom of the outer peripheral surface of the eccentric wheel, the upper end of the driven push rod passes through the through hole 1 provided on the top surface of the intermittent feeding slide frame, and the top surface of the driven push rod is fixedly connected to the bottom surface of the floating slide support seat; a guide column is provided on each side of the floating slide support seat, the top end of the guide column slides into the through hole 2 provided on the floating slide support seat, and the bottom end of the guide column is fixedly connected to the top surface of the intermittent feeding slide frame, and a compression spring is provided on the outside of each guide column, and the two ends of the compression spring are respectively connected to the top surface of the floating slide support seat and the bottom surface of the floating slide.

[0019] Furthermore, the overhead roller conveyor includes a chain conveyor device, a housing, a plurality of rollers, a plurality of roller supports, a pressure plate and a plurality of pressure wheels;

[0020] The top surface of the casing is provided with an opening, the head end of the top surface of the casing is fixedly connected to the end of the discharge chute, the casing is fixed to the periphery of the chain conveyor, the ear plate chain of the chain conveyor is fixedly connected to multiple roller brackets, multiple rollers are rotatably installed on the roller brackets, two adjacent rollers are parallel and closely adjacent to each other, the pressure wheel is concentrically fixed to one end of the roller, the pressure plate is fixed to the top surface of the conveying device frame of the chain conveyor, and is located below the detection device, and the pressure wheel is in contact with the pressure plate; the blanking port of the discharge chute is located at the opening and above the roller.

[0021] Furthermore, the detection device includes five high-speed cameras, a bar light source, three ring light sources, a box, a cabinet door and four legs;

[0022] The lower end of the box is open, and there is a gap in the middle of the front and rear side walls of the box for the overhead roller conveyor to pass through. Four legs are fixed to the bottom of the box, and a strip light source and three ring light sources are fixed in the box. Three of the five high-speed cameras are fixed at the top of the box and are located above the overhead roller conveyor. The other two high-speed cameras are fixed on the left and right side walls of the box and are located on the left and right sides above the roller conveyor. The strip light source is opposite the high-speed camera, and the three ring light sources are distributed and installed around the high-speed cameras and correspond to the high-speed cameras. The five high-speed cameras are connected to computer signals, and a cabinet door is rotatably installed on the side of the box.

[0023] Furthermore, the classification and collection device includes an air blowing nozzle, a collection slide and a collection box;

[0024] There are three blowing nozzles, collecting chutes and collecting boxes, which correspond to each other one by one; the three blowing nozzles are connected to the air pump through the air path, the air pump is connected to the air source, and the air source is connected to the computer signal. The three blowing nozzles are set toward the roller and close to the area where the roller carries the workpiece. One end of the three collecting chutes is fixedly connected to the conveying device frame, and the other end of the three collecting chutes is set at the box mouth at the upper end of the corresponding collection box. The three collection boxes are set on the side of the discharge port at the tail of the overhead roller conveyor, and the three blowing nozzles are all connected to the computer signal.

[0025] Furthermore, the feed chute, floating chute, middle chute and discharge chute are all V-groove structures.

[0026] A method for using a surface-colored fastener appearance color screening machine, characterized in that the method comprises the following steps:

[0027] S1, start the surface color fastener appearance color screening machine to perform self-inspection before work;

[0028] S2. Adjust the position of the baffle and the block according to the specifications to be processed;

[0029] S3, a batch of fasteners to be filled into the hopper of the feeding device, and the surface color fastener appearance color screening machine is operated;

[0030] S4, the loading device lifts and keeps the waiting object in the correct position, and then sends it to the two conveyor belts of the loading device;

[0031] S5, the to-be-eaten is uniformly transported by the two conveyor belts until it is sent out of the conveyor belt and finally falls into the V-shaped groove of the feed chute in the middle, slides in the inclined feed chute, and is blocked by the floating chute support seat and the end face of the floating chute at the end of the feed chute, enters a queue state, and the to-be-eaten that falls into the feed chute thereafter will be arranged in sequence behind the previous to-be-eaten;

[0032] S6, the floating slide and the floating slide support seat are driven to perform reciprocating linear motion. When the floating slide descends to the lowest position, the waiting position that was previously blocked by the floating slide support seat and the end surface of the floating slide is completely blocked by the end surface of the baffle after entering the floating slide and stops sliding. The subsequent waiting position enters the pending position;

[0033] S7, the floating slide rises. When it reaches the highest point, it is slightly higher than the middle slide. After being raised, it is free from the restriction of the baffle and continues to slide down, sliding into the middle slide and then into the discharge slide. Finally, it is blocked by the block at the end of the discharge slide, passes through the discharge opening of the discharge slide, and leaves the discharge slide and falls into the overhead roller conveyor.

[0034] S8, the trough structure formed by two adjacent rollers in the overhead roller conveyor is carried by the rollers, the roller brackets and the rollers to be transported horizontally under the drive of the ear plate chain;

[0035] S9, the roller and the roller support continue to move forward driven by the ear plate chain, and the pressure wheel fixed to one end of the roller contacts the pressure plate fixed to the conveyor frame, and the two form a friction pair, so that the roller rotates along its own axis while moving forward. When the two rollers to be in contact rotate, the roller begins to rotate along its own axis under the action of static friction.

[0036] S10. The product is sent to the inspection device and moves to different workstations to rotate to different angles while rotating and translating. Then, three high-speed cameras located at the top of the inspection device can collect complete circumferential surface information of the product. In combination with the other two high-speed cameras, the product can collect information on both end faces of the product. The results are summarized to obtain comprehensive information. The collected signals are sent to a computer processor connected to the high-speed cameras. After being processed by a computer program, the appearance color of the product is compared with the standard color to determine its quality. Based on the judgment results, control signals for the opening and closing states of the valves of the three blowing nozzles in the classification and collection device are generated respectively. The control signals are sent to each blowing nozzle in the classification and collection device via a computer controller.

[0037] S11. After being inspected, the products are sent out of the inspection device and driven by the chain conveyor and two adjacent rollers to enter the classification and collection device area. They are finally blown into the collection box corresponding to their quality by the blowing nozzle corresponding to their appearance quality.

[0038] S12, loop through steps S4-S11 until all the samples in the current batch have been screened.

[0039] Furthermore, in step S1, the self-detection items before work include: the operation status of the feeding device, the uniform speed operation status, the uniform speed operation status of the chain conveyor device; the operation status of each high-speed camera in the detection device and the signal connection status with the computer processor; the operation status of the gas source of the classification and collection device and the signal connection status with the computer controller.

[0040] Furthermore, in step S10, the color of the to-be-identified product is compared with the standard color to determine its quality. The determination results may be in three situations: qualified, unqualified, and unsuccessful identification.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The surface colored fastener appearance color screening machine of the present invention can protect the workpiece to be inspected from secondary damage when transporting the workpiece to be inspected through a smooth and coherent transportation method;

[0043] 2. The surface color fastener appearance color screening machine of the present invention uses an intermittent feeding slideway. The eccentric wheel mechanism drives the floating slideway to periodically reciprocate linear motion, achieving isochronous output of the workpieces to be inspected. In conjunction with the overhead roller conveyor, each workpiece to be inspected can stably fall into the groove structure formed by two adjacent rollers, ensuring the stability and rhythm of the entire machine operation.

[0044] 3. The intermittent feeding slide in the surface-colored fastener appearance color screening machine of the present invention can be adaptively adjusted to the different specifications of the workpieces to be inspected. The local topography of the slide, such as the length of the bearing surface and the length of the hole, can be adjusted by a knob to ensure that the machine can still operate normally when handling parts of different specifications. This not only realizes the simplicity and speed of the configuration process, but also ensures the versatility of the entire machine.

[0045] 4. The surface color fastener appearance color screening machine of the present invention uses a trough structure to carry the workpiece to be tested throughout the entire process, ensuring a stable carrying method and being applicable to various types and specifications of cylindrical fasteners, making the entire machine stable and universal;

[0046] 5. The surface colored fastener appearance color screening machine of the present invention uses a trough structure to carry the workpiece to be inspected, and uses an overhead roller conveyor to achieve a tumbling action of the workpiece to be inspected while stably carrying the workpiece, thereby realizing a full-scale display of the outer surface of the workpiece and ensuring the comprehensiveness of the information collection of the outer surface of the workpiece.

[0047] 6. The surface colored fastener appearance color screening machine of the present invention uses a trough structure to carry the workpiece to be inspected, has a reliable transportation method, a wide range of applications, and is suitable for threaded fasteners of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a surface-colored fastener appearance color screening machine of the present invention, with the arrow in the figure pointing to the conveying forward direction;

[0049] Figure 2 for Figure 1 A local enlarged view of point A in FIG;

[0050] Figure 3 for Figure 1 A partially cutaway schematic diagram of the three-dimensional structure of the intermittent feeding slideway;

[0051] Figure 4 for Figure 3 A local enlarged view of point B in FIG;

[0052] Figure 5 for Figure 3 Parts drawing of the floating slide support seat;

[0053] Figure 6 for Figure 3 Parts drawing of the middle slide support seat;

[0054] Figure 7 for Figure 3 Parts drawing of the discharge chute in the figure;

[0055] Figure 8 This is a schematic diagram of the three-dimensional structure of the connection between the intermittent feeding slide and the overhead roller conveyor; the overhead roller conveyor is in a cutaway form;

[0056] Figure 9 for Figure 8 A partial enlarged view of point C in the middle;

[0057] Figure 10 for Figure 1 Schematic diagram of the three-dimensional structure of the interaction between the middle pressure wheel and the pressure plate, with the arrow pointing to the conveying direction;

[0058] Figure 11 for Figure 1 Exploded view of the detection device in FIG.

[0059] Figure 12 for Figure 1 Schematic diagram of the three-dimensional structure of the classification and collection device working mode, in which OK, NG, and UN respectively represent qualified, unqualified, and unsuccessful identification.

[0060] The names and reference numerals of the components in the above drawings are as follows:

[0061] Feeding device 1, round belt 1-1, intermittent feeding slide 2, feed slide 2-1, feed slide support seat 2-2, floating slide 2-3, floating slide support seat 2-4, intermediate slide 2-5, intermediate slide support seat 2-6, discharge slide 2-7, eccentric wheel mechanism 2-8, DC motor 2-8-1, eccentric wheel 2-8-2, eccentric wheel bracket 2-8-3, driven push rod 2-8-4, guide column 2-8-5, compression spring 2-8-6, intermittent feeding slide frame 2-9, base 2-10, baffle 2-11, locking bolt 2-12, connecting rod Connecting plate 2-13, stop block 2-14, stop block adjusting bolt 2-15, pillar 2-16, slide 2-17, overhead roller conveyor 3, casing 3-1, roller 3-2, roller bracket 3-3, conveying device frame 3-4, ear plate chain 3-5, pressure plate 3-6, pressure wheel 3-7, detection device 4, high-speed camera 4-1, strip light source 4-2, three groups of ring light sources 4-3, box body 4-4, cabinet door 4-5, support leg 4-6, classification and collection device 5, air blowing nozzle 5-1, collection slide 5-2, collection box 5-3, workpiece to be detected 6. DETAILED DESCRIPTION

[0062] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] Specific implementation method 1: Figure 1 、 Figure 10 As shown, this embodiment describes a surface color fastener appearance color screening machine, including a loading device 1, an intermittent feeding slide 2 (for isochronous transmission of workpieces), an overhead roller conveyor 3 (for conveying and turning workpieces), a detection device 4 and a classification and collection device 5 (for all-round detection and classification of workpieces by quality);

[0064] The intermittent feeding chute 2 is set at an angle, and its head end is higher than the tail end. The tail end of the loading device 1 is located at the head end of the intermittent feeding chute 2. The tail end of the intermittent feeding chute 2 is detachably fixedly connected to the upper end of the casing 3-1 of the overhead roller conveyor 3. The drop-out port of the intermittent feeding chute 2 corresponds to the feed port of the overhead roller conveyor 3. A detection device 4 is provided above the overhead roller conveyor 3 (the detection device 4 spans above the middle part of the overhead roller conveyor 3), and the classification and collection device 5 is installed at the end of the discharge side of the overhead roller conveyor 3 (the loading device 1, the intermittent feeding chute 2, the overhead roller conveyor 3, the detection device 4 and the classification and collection device 5 are all independently installed on a horizontal platform and operate based on the same working frequency).

[0065] Specific implementation method 2: Figure 1 、 Figure 3-Figure 9 As shown, a surface colored fastener appearance color screening machine described in the specific embodiment 1, the intermittent feeding slide 2 includes a feeding slide 2-1, a feeding slide support seat 2-2, a floating slide 2-3, a floating slide support seat 2-4, an intermediate slide 2-5, an intermediate slide support seat 2-6, a discharging slide 2-7, an eccentric wheel mechanism 2-8, an intermittent feeding slide frame 2-9, a base 2-10, a baffle 2-11, a locking bolt 2-12, a stop block 2-14, a stop block adjusting bolt 2-15 and a support 2-16;

[0066] The feed chute 2-1, the floating chute 2-3, the intermediate chute 2-5 and the discharge chute 2-7 are arranged in sequence from the head end to the end end. The floating chute 2-3, the floating chute support seat 2-4 and the intermediate chute support seat 2-6 are all provided with chute grooves 2-17 of the same width along their respective extension directions. The chute grooves 2-17 of the floating chute 2-3 and the floating chute support seat 2-4 extend from the middle part of their own length direction to the end and are in a through state in their own height direction. The chute 2-17 of the intermediate chute support seat 2-6 is in a through state in its own length direction.

[0067] One end of the bottom surface of the intermittent feeding slide frame 2-9 close to the overhead roller conveyor 3 is hinged to one end of the top surface of the base 2-10 close to the overhead roller conveyor 3, and a support 2-16 is fixed to one end of the top surface of the base 2-10 close to the loading device 1, and the end of the bottom surface of the intermittent feeding slide frame 2-9 close to the loading device 1 rests on the support 2-16 (so that the bottom surface of the frame 2-9 and the top surface of the base 2-10 maintain a specific angle, which is generally 15°);

[0068] The head end of the feed chute 2-1 is aligned with the center of the end of the loading device 1, and the feed chute 2-1 is fixed on the feed chute support seat 2-2 (a fixing groove 1 is provided at the top of the feed chute support seat 2-2, and the feed chute 2-1 is fixed in the fixing groove 1 of the feed chute support seat 2-2), and the feed chute support seat 2-2 is fixed on the top surface of the intermittent feeding chute frame 2-9;

[0069] The floating slide 2-3 is fixed on the floating slide support seat 2-4 (a second fixing groove is provided at the top of the floating slide support seat 2-4, and the floating slide 2-3 is fixed in the second fixing groove of the floating slide support seat 2-4), the slide groove 2-17 of the floating slide 2-3 corresponds to the slide groove 2-17 of the floating slide support seat 2-4, the floating slide support seat 2-4 is fixedly connected to the eccentric wheel mechanism 2-8, and the eccentric wheel mechanism 2-8 is fixed inside the intermittent feeding slide frame 2-9 (the floating slide support seat 2-4 and the floating slide 2-3 are pushed to reciprocate linearly through the eccentric wheel mechanism 2-8);

[0070] The head end of the intermediate slide 2-5 is fixed on the intermediate slide support seat 2-6 (a fixing groove three is provided at the top of the intermediate slide support seat 2-6, and the head end of the intermediate slide 2-5 is fixed in the fixing groove three of the intermediate slide support seat 2-6), and the intermediate slide support seat 2-6 is fixed on the top surface of the intermittent feeding slide frame 2-9; the baffle 2-11 is slidably arranged in the slide groove 2-17 of the intermediate slide support seat 2-6 and the floating slide support seat 2-4 (the baffle 2-11 is slidably installed in the slide groove 2-17 of the intermediate slide support seat 2-6, and is placed in the slide groove 2-17 of the floating slide support seat 2-4 with a certain length), and the baffle 2-11 is clamped and fixed to the intermediate slide support seat 2-6 by a locking bolt 2-12 (the locking bolt 2-12 is installed at the end of the baffle 2-11);

[0071] The front end of the discharge chute 2-7 is fixedly connected to the rear end of the intermediate chute 2-5 (the front end of the discharge chute 2-7 is fixedly connected to the rear end of the intermediate chute 2-5 through two symmetrically arranged connecting plates 2-13), and the rear end of the discharge chute 2-7 is provided with the blanking port, and the end face of the rear end of the discharge chute 2-7 is provided with a threaded hole, and the stopper adjusting bolt 2-15 is screwed into the threaded hole of the discharge chute 2-7, and the rear end of the stopper adjusting bolt 2-15 is connected to the stopper 2-14 through a rotating pair, and the stopper 2-14 is arranged at the blanking port of the discharge chute 2-7 (rotating the stopper adjusting bolt 2-15 can drive the stopper 2-14 to move along the feeding and discharging direction, and adjust the size of the blanking port of the discharge chute 2-7).

[0072] When adjusting the position of the baffle 2-11 and the stop block 2-14, it is necessary to operate according to the overall length of the workpiece 6 to be inspected. The position of the baffle 2-11 is required to make the floating slide 2-3 only able to carry one workpiece 6 to be inspected, and the position of the stop block 2-14 is required to make the length of the blanking port of the discharge slide 2-7 approximately 1.3 times the overall length of the workpiece 6 to be inspected.

[0073] The effect of this technical solution is that the eccentric wheel mechanism 2-8, driven by the DC motor 2-8-1, causes the driven push rod 2-8-4 to drive the floating slide support seat 2-4 and the floating slide 2-3 to reciprocate in a direction perpendicular to the top surface of the intermittent feeding slide frame 2-9. The baffle 2-11 can slide in the slide groove 2-17 of the middle slide support seat 2-6 to adjust the bearing space in the groove of the floating slide 2-3 (the bearing space is used to carry the workpiece 6 to be inspected). The baffle 2-11 is clamped and fixed by the locking bolt 2-12. The rotating adjustment bolt 2-15 can drive the baffle 2-14 to move forward and backward to adjust the size of the discharge slide 2-7. The combination of the slide and the slide support seat makes the processing and installation of the various components of the intermittent feeding slide 2 more convenient. The hinged connection between the intermittent feeding chute frame 2-9 and the base 2-10 enables the intermittent feeding chute frame 2-9 to be placed at an angle. The use of a block-type design makes the shape of the parts of the intermittent feeding chute 2 simpler, reducing the difficulty of processing related parts. The floating chute 2-3 is used to receive and lift the workpiece 6 to be inspected. The periodic up and down floating of the floating chute 2-3 stably and reliably achieves the isochronous distribution of the workpiece 6 to be inspected, strengthens the fit with the subsequent overhead roller conveyor 3 and the operation of the detection device 4, and ensures the rhythmicity and stability of the operation of the entire machine. The baffle 2-11 is an auxiliary part. By changing the position of the baffle 2-11, the available space on the floating chute 2-3 is regulated to ensure that the intermittent feeding chute 2 is suitable for the intermittent transportation of fasteners of various specifications. The stopper 2-14 is an auxiliary part. By changing the position of the stopper 2-14, the size of the drop opening of the discharge chute 2-7 can be regulated, thereby assisting the workpiece 6 to be inspected to fall into the overhead roller conveyor 3 in the correct position.

[0074] Specific implementation method three: Figure 3 、 Figure 4 、 Figure 9 As shown, in the second embodiment of the present invention, the surface colored fastener appearance color screening machine, the eccentric wheel mechanism 2-8 includes a DC motor 2-8-1, an eccentric wheel 2-8-2, an eccentric wheel bracket 2-8-3, a driven push rod 2-8-4, two guide pillars 2-8-5 and two compression springs 2-8-6;

[0075] The DC motor 2-8-1 and the eccentric wheel bracket 2-8-3 are both fixed inside the intermittent feeding slide frame 2-9. The output shaft of the DC motor 2-8-1 rotates through the eccentric wheel bracket 2-8-3 and is fixedly connected to the eccentric wheel 2-8-2. The lower end of the driven push rod 2-8-4 contacts the bottom of the outer peripheral surface of the eccentric wheel 2-8-2. The upper end of the driven push rod 2-8-4 passes through the through hole 1 provided on the top surface of the intermittent feeding slide frame 2-9. The top surface of the driven push rod 2-8-4 contacts the floating slide. The bottom surface of the slide support seat 2-4 is fixedly connected; a guide column 2-8-5 is provided on each side of the left and right sides of the floating slide support seat 2-4, and the top end of the guide column 2-8-5 slides into the second through hole provided on the floating slide support seat 2-4, and the bottom end of the guide column 2-8-5 is fixedly connected to the top surface of the intermittent feeding slide frame 2-9, and a compression spring 2-8-6 is provided on the outer side of each guide column 2-8-5, and the two ends of the compression spring 2-8-6 are respectively connected to the top surface of the floating slide support seat 2-4 and the bottom surface of the floating slide 2-3.

[0076] The effect of this technical solution is: the setting of two guide columns 2-8-5 and two compression springs 2-8-6 provides sufficient restoring force, so that the eccentric wheel mechanism 2-8 can push the floating slide support seat 2-4 and the floating slide 2-3 to reciprocating linear motion.

[0077] Specific embodiment 4: Specific embodiment 3 described in a surface colored fastener appearance color screening machine, the overhead roller conveyor 3 includes a chain conveyor device (which is the existing technology), a housing 3-1, a plurality of rollers 3-2, a plurality of roller brackets 3-3, a pressure plate 3-6 and a plurality of pressure wheels 3-7;

[0078] The top surface of the casing 3-1 is provided with an opening, and the head end of the top surface of the casing 3-1 is fixedly connected to the end of the discharge chute 2-7 (by means of stud nuts), and the casing 3-1 is fixed to the periphery of the chain conveyor device, and the ear plate chain 3-5 of the chain conveyor device is fixedly connected to the multiple roller brackets 3-3 (by means of bolts), and the multiple rollers 3-2 are rotatably mounted on the roller brackets 3-3, and the adjacent two rollers 3-2 are parallel and closely adjacent (the groove structure formed between the adjacent two rollers 3-2 is used to carry the materials to be inspected). Detecting workpiece 6. When the roller 3-2 rolls, it drives the workpiece 6 to be detected to rotate at a certain angular velocity, and at the same time, it performs linear motion driven by the ear plate chain 3-5. The pressure wheel 3-7 is concentrically fixed to one end of the roller 3-2, and the pressure plate 3-6 is fixed to the top surface of the conveying device frame 3-4 of the chain conveyor and is located below the detection device 4. The pressure wheel 3-7 is in contact with the pressure plate 3-6; the discharge port of the discharge chute 2-7 is located at the open end and above the roller 3-2.

[0079] The effect of this technical solution is that when the motor of the chain conveyor device is working, the roller bracket 3-3 and the roller 3-2 located on the upper side move forward horizontally under the drive of the chain conveyor device, and the pressure wheel 3-7 above the pressure plate 3-6 is driven to rotate, thereby driving the rotation of the roller 3-2.

[0080] The discharge chute 2-7 is fixed to the top of the housing 3-1, reducing the relative displacement between the end of the intermittent feed chute 2 and the overhead roller conveyor 3, further ensuring the stability and life of the entire machine. While the closely arranged rollers 3-2 advance horizontally, when passing under the detection device 4, the contact between the pressure wheel 3-7 and the pressure plate 3-6 forms a friction pair, causing rotation. The adjacent rollers 3-2 rotating in the same direction, while carrying the workpiece 6 to be inspected, realize the flipping of the workpiece 6 to be inspected, and cooperate with the high-speed camera 4-1 placed on the top of the detection device 4 to achieve a full-scale acquisition of the appearance of the workpiece 6 to be inspected.

[0081] Specific implementation method five: Figure 1 、 Figure 11 As shown, a surface colored fastener appearance color screening machine described in the fourth embodiment, the detection device 4 includes five high-speed cameras 4-1, a strip light source 4-2, three ring light sources 4-3, a box 4-4, a cabinet door 4-5 and four legs 4-6;

[0082] The lower end of the box 4-4 is open, and a gap is provided in the middle of the front and rear side walls of the box 4-4 for the overhead roller conveyor 3 to pass through. Four legs 4-6 are fixed to the bottom of the box 4-4. A strip light source 4-2 and three ring light sources 4-3 are fixed in the box 4-4. Three of the five high-speed cameras 4-1 are fixed to the top of the box 4-4 and are located above the overhead roller conveyor 3 (that is, above the path through which the workpiece 6 to be inspected passes). The remaining two high-speed cameras 4-1 are fixed to the left and right side walls of the box 4-4 and are located on the left side above the roller conveyor 3. On the right side (i.e., on the left and right sides above the path through which the workpiece 6 to be inspected passes. Five high-speed cameras 4-1 capture images from different angles), a strip light source 4-2 is located opposite the high-speed camera 4-1 (so that light can evenly illuminate the workpiece 6 to be inspected, reducing shadows and reflections). Three annular light sources 4-3 are distributed and installed around the high-speed camera 4-1 and corresponding to the high-speed camera 4-1 (to achieve the best lighting effect). The five high-speed cameras 4-1 are connected to computer signals. A cabinet door 4-5 is rotatably installed on the side of the box 4-4 (to protect the equipment inside the box 4-4). All light sources are powered by an external power supply.

[0083] The effect of this technical solution is that surface images of the workpiece 6 to be inspected can be collected from various angles.

[0084] Specific implementation method six: Figure 1、 Figure 12 As shown, in the fifth embodiment of the present invention, a surface colored fastener appearance color screening machine, the classification and collection device 5 includes an air blowing nozzle 5-1, a collection slide 5-2 and a collection box 5-3;

[0085] There are three blowing nozzles 5-1, collecting chutes 5-2 and collecting boxes 5-3, and they correspond to each other one by one (arranged at equal intervals); the three blowing nozzles 5-1 are connected to the air pump through the air path, the air pump is connected to the air source (the combination of the air path, air pump and air source is collectively referred to as the air path system), and the air source is connected to the computer signal. The three blowing nozzles 5-1 are arranged toward the roller 3-2 and close to the area where the roller 3-2 carries the workpiece. One end of the three collecting chutes 5-2 is fixedly connected to the conveying device frame 3-4, and the other end of the three collecting chutes 5-2 is arranged at the box mouth of the upper end of the corresponding collection box 5-3 (to receive the workpieces sorted by the blowing nozzle 5-1). The three collection boxes 5-3 are arranged on the side of the discharge port at the tail of the overhead roller conveyor 3, and the three blowing nozzles 5-1 are all connected to the computer signal.

[0086] Specific implementation method seven: Figure 1-Figure 4 As shown, in the specific embodiment six, a surface colored fastener appearance color screening machine is described, wherein the feed chute 2-1, the floating chute 2-3, the middle chute 2-5, and the discharge chute 2-7 are all V-groove structures (used to limit and maintain the posture of the workpiece 6 to be inspected).

[0087] The two parallel round belts 1-1 of the loading device 1 (purchased equipment) form a conveyor belt, and a narrow and long groove structure (used to limit and maintain the posture of the workpiece 6 to be inspected) is formed between the two round belts 1-1, so that the workpiece 6 to be inspected can maintain a stable posture during the transportation process, and is matched with the feed chute 2-1, floating chute 2-3, middle chute 2-5, and discharge chute 2-7 with a V-groove structure, so as to realize the orderly and stable transportation of the workpiece 6 to be inspected, and facilitate the next process.

[0088] Specific implementation eight: Figures 1-12 As shown, this embodiment describes a method for using a surface-colored fastener appearance color screening machine according to specific embodiments one to seven, the method comprising the following steps:

[0089] S1, start the surface color fastener appearance color screening machine to perform self-inspection before work;

[0090] S2. Adjust the positions of the baffle 2-11 and the stopper 2-14 according to the specifications of the workpiece 6 to be inspected;

[0091] S3, a batch of workpieces 6 to be inspected are loaded into the hopper of the feeding device 1, and the surface colored fastener appearance color screening machine is operated;

[0092] S4, the loading device 1 lifts and retains the workpiece 6 to be inspected in the correct posture, and then sends it to the conveyor belt composed of the two round belts 1-1 of the loading device 1;

[0093] S5, the workpiece 6 to be inspected is transported at a constant speed by the conveyor belt composed of two round belts 1-1 until it is sent out of the conveyor belt and finally falls into the V-shaped groove of the feed chute 2-1 in the intermittent feeding chute 2. The workpiece 6 to be inspected slides in the inclined feed chute 2-1 and is blocked by the floating chute support seat 2-4 and the end face of the floating chute 2-3 at the end of the feed chute 2-1, entering a queue state. After that, the workpiece 6 to be inspected that falls into the feed chute 2-1 will be arranged in sequence behind the previous workpiece 6 to be inspected.

[0094] S6, the floating slide 2-3 and the floating slide support seat 2-4 are driven by the eccentric wheel mechanism 2-8 to perform reciprocating linear motion. When the floating slide 2-3 drops to the lowest position, the workpiece 6 to be inspected, which was previously blocked by the end faces of the floating slide support seat 2-4 and the floating slide 2-3, slides into the floating slide 2-3. After completely entering the floating slide 2-3, it is blocked by the end face of the baffle 2-11 and stops sliding. The workpiece 6 to be inspected thereafter enters the pending position in sequence.

[0095] S7, the floating slide 2-3 rises. When it reaches the highest point, the floating slide 2-3 is slightly higher than the middle slide 2-5. The workpiece 6 to be inspected is lifted, freed from the restriction of the baffle 2-11, and continues to slide down, sliding into the middle slide 2-5, and then into the discharge slide 2-7. Finally, it is stopped by the block 2-14 at the end of the discharge slide 2-7, passes through the discharge opening of the discharge slide 2-7, leaves the discharge slide 2-7, and falls into the overhead roller conveyor 3;

[0096] S8, the workpiece 6 to be inspected is carried by the trough structure formed by the two adjacent rollers 3-2 in the overhead roller conveyor 3, and driven by the ear plate chain 3-5, the roller 3-2, the roller support 3-3 and the workpiece 6 to be inspected move horizontally;

[0097] S9, the roller 3-2 and the roller bracket 3-3 continue to move forward driven by the ear plate chain 3-5, and the pressure wheel 3-7 fixedly connected to one end of the roller 3-2 will contact the pressure plate 3-6 fixed on the conveyor frame 3-4, and the two form a friction pair, so that the roller 3-2 rotates along its own axis while moving forward. When the two rollers 3-2 in contact with the workpiece 6 to be inspected rotate, the workpiece 6 to be inspected begins to rotate along its own axis under the action of static friction.

[0098] S10, the workpiece 6 to be inspected is sent into the inspection device 4, and in the state of self-rotation and translation, it moves to different workstations and rotates to different angles. Then the three high-speed cameras 4-1 located on the top of the inspection device 4 can collect the complete circumferential surface information of the workpiece 6 to be inspected, and combine with the other two high-speed cameras 4-1 to collect the two end faces of the workpiece 6 to be inspected. The results are summarized to obtain all-round collection information, and the collected signals are sent to the computer processor connected to the high-speed camera 4-1. After being processed by the computer program, the appearance color of the workpiece 6 to be inspected is compared with the standard color to judge its quality. According to the judgment result, control signals for the valve opening and closing states of the three blowing nozzles 5-1 in the classification and collection device 5 are generated respectively, and the control signals are sent to each blowing nozzle 5-1 in the classification and collection device 5 via the computer controller;

[0099] S11: After being inspected, the workpiece 6 is sent out of the inspection device 4 and driven by the chain conveyor and two adjacent rollers 3-2 into the classification and collection device 5. Finally, the workpiece 6 is blown into the collection box 5-3 corresponding to its quality by the blowing nozzle 5-1 corresponding to its appearance quality.

[0100] S12, looping through steps S4-S11 until all the workpieces 6 to be inspected in this batch have been screened.

[0101] Specific implementation method nine: Figures 1-12 As shown, the method for using a surface colored fastener appearance color screening machine described in specific embodiment eight, in step S1, the self-test items before work include: the operation status of the feeding device 1 (under the action of the motor driver and controller of the feeding device 1, the two round belts 1-1 run at a uniform speed as a conveyor belt), the uniform speed operation of the DC motor 2-8-1, and the uniform speed operation of the chain conveyor; the operation status of each high-speed camera 4-1 in the detection device 4 and the signal connection status with the computer processor; the operation status of the air source of the classification and collection device 5 and the signal connection status with the computer controller.

[0102] Specific implementation method ten: Figures 1-12 As shown, in the method for using a surface colored fastener appearance color screening machine described in specific embodiment eight or nine, in step S10, the appearance color of the workpiece 6 to be inspected is compared with the standard color to judge its quality, and the judgment results have three situations, namely qualified, unqualified, and unsuccessful identification.

[0103] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0104] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A surface color fastener appearance color screening machine, characterized by: It comprises a loading device (1), an intermittent feeding chute (2), an overhead roller conveyor (3), a detection device (4) and a classification and collection device (5); the intermittent feeding chute (2) is arranged at an angle, and its head end is higher than the tail end, the tail end of the loading device (1) is located at the head end of the intermittent feeding chute (2), the tail end of the intermittent feeding chute (2) is detachably fixedly connected to the upper end of the housing (3-1) of the overhead roller conveyor (3), the drop port of the intermittent feeding chute (2) corresponds to the feed port of the overhead roller conveyor (3), a detection device (4) is arranged above the overhead roller conveyor (3), and the classification and collection device (5) is installed at the tail end of the discharge side of the overhead roller conveyor (3); The intermittent feeding slide (2) includes a feeding slide (2-1), a feeding slide support seat (2-2), a floating slide (2-3), a floating slide support seat (2-4), an intermediate slide (2-5), an intermediate slide support seat (2-6), a discharging slide (2-7), an eccentric wheel mechanism (2-8), an intermittent feeding slide frame (2-9), a base (2-10), a baffle (2-11), a locking bolt (2-12), a stopper (2-14), a stopper adjusting bolt (2-15) and a support pillar (2-16); The feed slide (2-1), the floating slide (2-3), the intermediate slide (2-5) and the discharge slide (2-7) are arranged in sequence from the head end to the tail end. The floating slide (2-3), the floating slide support seat (2-4) and the intermediate slide support seat (2-6) are all provided with slide grooves (2-17) of the same width along their respective extension directions. The slide grooves (2-17) of the floating slide (2-3) and the floating slide support seat (2-4) extend from the middle of their own length direction to the tail end and are in a through-state in their own height direction. The slide groove (2-17) of the intermediate slide support seat (2-6) is in a through-state in its own length direction. One end of the bottom surface of the intermittent feeding slide frame (2-9) close to the overhead roller conveyor (3) is hinged to one end of the top surface of the base (2-10) close to the overhead roller conveyor (3); a support (2-16) is fixed to one end of the top surface of the base (2-10) close to the loading device (1); and one end of the bottom surface of the intermittent feeding slide frame (2-9) close to the loading device (1) abuts against the support (2-16); The front end of the feed slide (2-1) is aligned with the rear end of the loading device (1), the feed slide (2-1) is fixed on the feed slide support seat (2-2), and the feed slide support seat (2-2) is fixed on the top surface of the intermittent feed slide frame (2-9); The floating slide (2-3) is fixed on the floating slide support seat (2-4), the slide groove (2-17) of the floating slide (2-3) corresponds to the slide groove (2-17) of the floating slide support seat (2-4), the floating slide support seat (2-4) is fixedly connected to the eccentric wheel mechanism (2-8), and the eccentric wheel mechanism (2-8) is fixed inside the intermittent feeding slide frame (2-9); The head end of the intermediate slide (2-5) is fixed on the intermediate slide support seat (2-6), and the intermediate slide support seat (2-6) is fixed on the top surface of the intermittent feeding slide frame (2-9); the baffle (2-11) is slidably arranged in the intermediate slide support seat (2-6) and the sliding groove (2-17) of the floating slide support seat (2-4), and the baffle (2-11) is clamped and fixed on the intermediate slide support seat (2-6) by a locking bolt (2-12); The head end of the discharge slide (2-7) is fixedly connected to the end of the middle slide (2-5), the end of the discharge slide (2-7) is provided with the blanking port, the end surface of the end of the discharge slide (2-7) is provided with a threaded hole, the stopper adjusting bolt (2-15) is screwed into the threaded hole of the discharge slide (2-7), the end of the stopper adjusting bolt (2-15) is connected to the stopper (2-14) through a rotating pair, and the stopper (2-14) is arranged at the blanking port of the discharge slide (2-7).

2. The surface-colored fastener appearance color screening machine according to claim 1, characterized in that: The eccentric wheel mechanism (2-8) includes a DC motor (2-8-1), an eccentric wheel (2-8-2), an eccentric wheel bracket (2-8-3), a driven push rod (2-8-4), two guide pillars (2-8-5) and two compression springs (2-8-6); The DC motor (2-8-1) and the eccentric wheel bracket (2-8-3) are both fixed inside the intermittent feeding slide frame (2-9). The output shaft of the DC motor (2-8-1) rotates through the eccentric wheel bracket (2-8-3) and is fixedly connected to the eccentric wheel (2-8-2). The lower end of the driven push rod (2-8-4) contacts the bottom of the outer peripheral surface of the eccentric wheel (2-8-2). The upper end of the driven push rod (2-8-4) passes through a through hole 1 provided on the top surface of the intermittent feeding slide frame (2-9). The top surface of the driven push rod (2-8-4) is in contact with the floating slide. The bottom surface of the support seat (2-4) is fixedly connected; a guide column (2-8-5) is provided on each of the left and right sides of the floating slide support seat (2-4); the top end of the guide column (2-8-5) slides into the second through hole provided on the floating slide support seat (2-4); the bottom end of the guide column (2-8-5) is fixedly connected to the top surface of the intermittent feeding slide frame (2-9); a compression spring (2-8-6) is provided on the outer side of each guide column (2-8-5), and the two ends of the compression spring (2-8-6) are respectively connected to the top surface of the floating slide support seat (2-4) and the bottom surface of the floating slide (2-3).

3. The surface color fastener appearance color screening machine according to claim 2, characterized in that: The overhead roller conveyor (3) comprises a chain conveying device, a housing (3-1), a plurality of rollers (3-2), a plurality of roller supports (3-3), a pressure plate (3-6) and a plurality of pressure wheels (3-7); The top surface of the casing (3-1) is provided with an opening, the head end of the top surface of the casing (3-1) is fixedly connected to the end of the discharge chute (2-7), the casing (3-1) is fixed to the periphery of the chain conveyor device, the ear plate chain (3-5) of the chain conveyor device is fixedly connected to multiple roller brackets (3-3), multiple rollers (3-2) are rotatably mounted on the roller brackets (3-3), two adjacent rollers (3-2) are parallel and closely adjacent, the pressure wheel (3-7) is concentrically fixed to one end of the roller (3-2), the pressure plate (3-6) is fixed to the top surface of the conveying device frame (3-4) of the chain conveyor device and is located below the detection device (4), and the pressure wheel (3-7) is in contact with the pressure plate (3-6); the blanking port of the discharge chute (2-7) is located at the opening and above the roller (3-2).

4. The surface color fastener appearance color screening machine according to claim 3, characterized in that: The detection device (4) comprises five high-speed cameras (4-1), a strip light source (4-2), three annular light sources (4-3), a box (4-4), a cabinet door (4-5) and four legs (4-6); The lower end of the box (4-4) is open, and the middle of the front and rear side walls of the box (4-4) are provided with a notch for the overhead roller conveyor (3) to pass through. Four legs (4-6) are fixed to the bottom of the box (4-4), and a strip light source (4-2) and three ring light sources (4-3) are fixed inside the box (4-4). Three of the five high-speed cameras (4-1) are fixed to the top of the box (4-4) and are located above the overhead roller conveyor (3). The remaining two high-speed cameras (4-1) are fixed on the left and right side walls of the box (4-4) and are located on the left and right sides above the roller conveyor (3). The strip light source (4-2) is located opposite the high-speed camera (4-1). Three annular light sources (4-3) are distributed and installed around the high-speed camera (4-1) and correspond to the high-speed camera (4-1). The five high-speed cameras (4-1) are connected to computer signals. A cabinet door (4-5) is rotatably installed on the side of the box (4-4).

5. The surface color fastener appearance color screening machine according to claim 4, characterized in that: The classification and collection device (5) comprises an air blowing nozzle (5-1), a collection slide (5-2) and a collection box (5-3); There are three air blowing nozzles (5-1), three collecting slides (5-2) and three collecting boxes (5-3), which correspond to each other one by one. The three air blowing nozzles (5-1) are connected to the air pump through the air path, the air pump is connected to the air source, and the air source is connected to the computer signal. The three air blowing nozzles (5-1) are arranged toward the roller (3-2) and close to the area where the roller (3-2) carries the workpiece. One end of the three collecting slides (5-2) is fixedly connected to the conveying device frame (3-4), and the other end of the three collecting slides (5-2) is arranged at the box opening of the upper end of the corresponding collecting box (5-3). The three collecting boxes (5-3) are arranged on the side of the discharge port at the tail of the overhead roller conveyor (3). The three air blowing nozzles (5-1) are all connected to the computer signal.

6. The surface color fastener appearance color screening machine according to claim 5, characterized in that: The feed slide (2-1), the floating slide (2-3), the intermediate slide (2-5), and the discharge slide (2-7) all have V-groove structures.

7. A method for using the surface-colored fastener appearance color screening machine according to claim 6, characterized in that: The method comprises the following steps: S1, start the surface color fastener appearance color screening machine to perform self-inspection before work; S2. Adjust the positions of the baffle (2-11) and the stopper (2-14) according to the specifications of the workpiece (6) to be inspected; S3, a batch of workpieces to be inspected (6) are loaded into the hopper of the feeding device (1), and the surface color fastener appearance color screening machine is operated; S4, the loading device (1) lifts and retains the workpiece (6) to be inspected in the correct posture, and then sends it to the conveyor belt composed of two round belts (1-1) of the loading device (1); S5, the workpiece (6) to be inspected is uniformly transported by the conveyor belt formed by the two round belts (1-1) until it is sent out of the conveyor belt and finally falls into the V-shaped groove of the feed slide (2-1) in the intermittent feeding slide (2). The workpiece (6) to be inspected slides in the inclined feed slide (2-1) and is blocked by the end face of the floating slide support seat (2-4) and the floating slide (2-3) at the end of the feed slide (2-1), entering a queuing state, and the workpiece (6) to be inspected that falls into the feed slide (2-1) will be arranged in sequence behind the previous workpiece (6) to be inspected; S6, the floating slide (2-3) and the floating slide support seat (2-4) perform reciprocating linear motion under the drive of the eccentric wheel mechanism (2-8). When the floating slide (2-3) descends to the lowest position, the workpiece (6) to be inspected, which was previously blocked by the end faces of the floating slide support seat (2-4) and the floating slide (2-3), slides into the floating slide (2-3). After completely entering the floating slide (2-3), it is blocked by the end face of the baffle (2-11) and stops sliding. The subsequent workpiece (6) to be inspected enters the pending position in sequence. S7, the floating slide (2-3) rises, and when it reaches the highest point, the floating slide (2-3) is slightly higher than the middle slide (2-5), and the workpiece (6) to be inspected is raised, freed from the restriction of the baffle (2-11), and continues to slide down, sliding into the middle slide (2-5), and then sliding into the discharge slide (2-7), and finally being blocked by the block (2-14) at the end of the discharge slide (2-7), leaving the discharge slide (2-7) through the drop port of the discharge slide (2-7), and falling into the overhead roller conveyor (3); S8, the workpiece (6) to be inspected is carried by the trough structure formed by two adjacent rollers (3-2) in the overhead roller conveyor (3), and driven by the ear plate chain (3-5), the rollers (3-2), the roller bracket (3-3) and the workpiece (6) to be inspected move horizontally; S9, the roller (3-2) and the roller support (3-3) continue to move forward under the drive of the ear plate chain (3-5), and the pressure wheel (3-7) fixedly connected to one end of the roller (3-2) contacts the pressure plate (3-6) fixed on the conveying device frame (3-4), and the two form a friction pair, so that the roller (3-2) rotates along its own axis while moving forward. When the two rollers (3-2) in contact with the workpiece (6) to be inspected rotate, the workpiece (6) to be inspected begins to rotate along its own axis under the action of static friction. S10, the workpiece (6) to be inspected is sent into the inspection device (4), and in the state of self-rotation and translation, it moves to different workstations and rotates to different angles, and then the three high-speed cameras (4-1) located on the top of the inspection device (4) can collect the complete circumferential surface information of the workpiece (6) to be inspected, and in combination with the other two high-speed cameras (4-1), collect the two end faces of the workpiece (6) to be inspected, and the results are summarized to obtain all-round collection information. The collected signal is sent to a computer processor connected to the high-speed camera (4-1), and the appearance color of the workpiece (6) to be inspected is compared with the standard color through computer program processing to judge its quality. According to the judgment result, a control signal for the valve opening and closing state of the three blowing nozzles (5-1) in the classification and collection device (5) is generated respectively, and the control signal is sent to each blowing nozzle (5-1) in the classification and collection device (5) through the computer controller; S11, after being inspected, the workpiece (6) to be inspected is sent out of the inspection device (4), and is continuously driven by the chain conveyor device and the two adjacent rollers (3-2) to enter the classification and collection device (5) area, and is finally blown by the blowing nozzle (5-1) corresponding to the appearance quality of the workpiece (6) to be inspected into the collection box (5-3) corresponding to its quality; S12, looping through steps S4-S11 until all the workpieces (6) to be inspected in this batch have been screened.

8. The method of use according to claim 7, characterized in that: In step S1, the self-test items before work include: the operation status of the feeding device (1), the uniform speed operation status of the DC motor (2-8-1), and the uniform speed operation status of the chain conveyor; the operation status of each high-speed camera (4-1) in the detection device (4) and the signal connection status with the computer processor; the operation status of the gas source of the classification and collection device (5) and the signal connection status with the computer controller.

9. The method of use according to claim 7 or 8, characterized in that: In step S10, the appearance color of the workpiece (6) to be inspected is compared with the standard color to judge its quality. The judgment results have three situations, namely qualified, unqualified, and unsuccessful identification.

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