Freezing chamber air duct cover plate production device and method

Abstract

The invention relates to the technical field of air duct cover plate production, in particular to a freezing chamber air duct cover plate production device and method.The freezing chamber air duct cover plate production device comprises a conveyor, a production mechanism is arranged on the conveyor and used for cover plate machining, and the production mechanism comprises a material storage assembly and a material conveying assembly, a feeder is arranged on the positioning part and is used for feeding a cover plate; the feeding assembly is arranged on the storage assembly and used for feeding the cover plate; the detection assembly is arranged in front of the upper end of the conveyor and used for detecting the cover plate; the auxiliary assembly comprises an overturning part arranged behind the upper end of the conveyor and used for overturning the cover plate, and an adsorption part is arranged on the overturning part and used for adsorbing the cover surface; stable adsorption of multi-specification cover plates is achieved by adjusting the distance between the suction cups, the double-face detection precision is ensured through the servo driving turnover mechanism, and an efficient automatic production line is formed in cooperation with a visual detection system arranged in a crossed mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the production technology field of air duct cover plate, in particular to a frozen room air duct cover plate production device and method. BACKGROUND

[0002] The frozen room air duct cover plate is an important component in the refrigeration equipment, mainly used for guiding the cold air flow and isolating different temperature zones, and its manufacturing quality directly affects the refrigeration efficiency and energy consumption performance. With the development of the home appliance industry towards intelligence and high efficiency, the market puts forward higher requirements on the size precision, surface quality and production efficiency of the air duct cover plate;

[0003] According to the search of the publication number: CN216970842U, a self-positioning conveying device for visual detection equipment is disclosed, which discloses the technical scheme of "including a chassis, a rack, a detection box, a rotating roller, a visual detection device, a positioning mechanism, a power mechanism, a transmission mechanism and an intermittent mechanism, the rack is installed on the chassis, the detection box is installed on the rack, a cavity is arranged in the detection box, the visual detection device is installed in the cavity of the detection box, two groups of positioning mechanisms are installed on the rack, the power mechanism and the intermittent mechanism are installed on the chassis, the output end of the power mechanism is connected with the input end of the intermittent mechanism, the output end of the intermittent mechanism is connected with the input end of the transmission mechanism, a plurality of rotating rollers are installed on the rack and rotate relative to each other, and the output end of the transmission mechanism is connected with the input end of the rotating roller" and the like;

[0004] The existing frozen room air duct cover plate double-sided detection usually adopts the mode of single camera cooperating with mechanical overturning mechanism to realize, the top surface of the cover plate is shot first during detection, and then the bottom surface is shot for the second time after the cover plate is overturned by 180 degrees through the overturning mechanism; This way has low detection efficiency, and the whole system occupies large area, has high energy consumption, and is difficult to meet the requirements of modern production line on detection efficiency and precision. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a frozen room air duct cover plate production device and method, which realizes stable adsorption of multiple specifications of cover plates through adjustable suction cup spacing, ensures double-sided detection precision through servo-driven overturning mechanism, and forms an efficient automatic production line by cooperating with a cross-laid visual detection system. Each functional module works cooperatively to significantly improve the production efficiency while ensuring the product quality, and has good process adaptability.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a frozen room air duct cover plate production device and method, comprising a conveyor, the conveyor is provided with a production mechanism and is used for cover plate processing, and the production mechanism comprises:

[0007] A storage assembly is arranged on the left side of the conveyor and is used for cover plate positioning, and a feeding device is arranged on the positioning component and is used for cover plate feeding;

[0008] A feeding assembly is arranged on the storage assembly and used for feeding the cover plates;

[0009] A detecting assembly is arranged in front of the upper end of the conveyor and used for detecting the cover plates;

[0010] An auxiliary assembly comprises a turnover component arranged at the rear of the upper end of the conveyor and used for overturning the cover plates, and the turnover component is provided with suction components and used for suctioning the cover plates.

[0011] Preferably, the suction components comprise a frame arranged on the turnover component, two first long rods cross-installed at the middle of the front end of the frame, two second long rods cross-installed at the outer sides of the first long rods and hinged to the first long rods, short rods hinged to the outer sides of the second long rods, and the outer sides of the two short rods are hinged to each other, and the front ends of the cross sections of the two first long rods, the two second long rods and the two short rods are all rotatably installed with sliding plates, the front ends of the two sides of the sliding plates are all installed with second suction discs, the two ends of the sliding plates are all fixed with sliding blocks and slidably connected with the frame, and one end of the frame is installed with a gas cylinder and used for driving one of the sliding plates to move.

[0012] Preferably, the turnover component comprises a shaft frame fixed on the conveyor, a shaft rod rotatably installed between the two ends of the shaft frame, a third upper servo motor installed at one end of the shaft frame and used for driving the shaft rod to rotate, a support arm fixed on the outer wall of the shaft rod, and the frame is fixed on the shaft rod.

[0013] Preferably, the detecting assembly comprises a stand fixed on the conveyor, a lower support fixed on the outer wall of the middle of the stand, a bottom detecting camera installed horizontally on the lower support, an upper support fixed on the outer wall of the upper end of the stand, and a top detecting camera installed vertically on the upper support.

[0014] Preferably, the positioning component comprises a base arranged on the left side of the conveyor, a positioning frame slidably installed around the upper end of the base, a belt rotatably installed around the bottom of the base, and the left and right two belts and the front and rear two belts are all installed with belts, and the two ends of the two belts are respectively fixed with the lower ends of the positioning frames around the four sides, and two first servo motors are installed at the lower end of the base and used for respectively driving the left and right and front and rear belts to rotate.

[0015] Preferably, the feeding further comprises a supporting plate arranged above the middle of the base, balance rods fixed at the four corners of the bottom of the supporting plate and slidably connected with the base, a bottom plate fixed between the bottoms of the four balance rods, a second servo motor installed at the bottom of the bottom plate, a lead screw fixed at the output end of the second servo motor and threadedly connected with the base, and the upper end of the lead screw is rotatably connected with the supporting plate.

[0016] Preferably, the feeding assembly comprises a gantry fixed on the top of the base, a double-shaft air cylinder is installed on the upper end of the gantry, a rotary air cylinder is installed on the lower output end of the double-shaft air cylinder, a cross frame is fixed on the lower output end of the rotary air cylinder, adjusting frames are fixed on both ends of the cross frame, and first suction cups are installed on both ends of the double-shaft air cylinder.

[0017] The application further discloses a production method of the cover plate of the refrigeration chamber air duct.

[0018] S1, first, the cover plates are stacked on the feeding device, and the cover plates are limited by the positioning component, and the cover plates are continuously and intermittently fed by the feeding device;

[0019] S2, then the uppermost cover plate is grabbed by the feeding assembly and rotated by 180 degrees to the conveyor, and the top surface of the cover plate is visually detected by the conveyor.

[0020] S3, finally, the suction component is controlled to be flipped downward by the flipping component, the cover plate is adsorbed and fixed, the cover plate adsorbed and fixed by the suction component is controlled to be flipped upward by 90 degrees to the rear of the detection component by the flipping component, and the bottom surface of the cover plate is visually detected.

[0021] The application provides a production device and method of the cover plate of the refrigeration chamber air duct.

[0022] 1, when the cylinder drives the rightmost sliding plate to move, the sliding plate drives the first long rod to rotate through the hinged cooperation of the short rod and the second long rod, thereby synchronously moving the remaining sliding plates, and the middle sliding plate remains in a fixed position, only the two side sliding plates are symmetrically displaced, so that the second suction cup spacing is accurately adjusted, and the uniform distribution of the adsorption force is ensured.

[0023] 2, when the third upper servo motor drives the shaft rod to rotate, the support arm fixed on the shaft rod drives the whole suction component to perform an accurate flipping motion; through the cooperative cooperation of the flipping component and the suction component, the process requirement of double-face detection of the cover plate is realized, the stable flipping action avoids the surface damage or deformation of the cover plate, meanwhile, the programmable control characteristics of the servo motor enable the flipping speed and angle to be flexibly adjusted according to different product requirements, so that the adaptability and production efficiency of the equipment are greatly improved.

[0024] 3, the lower support fixed on the stand bears the bottom detection camera arranged in the transverse direction and the top detection camera arranged in the longitudinal direction, and a cross detection layout is formed; the top surface of the cover plate placed on the conveyor is visually detected by the top detection camera, and the bottom surface of the flipped cover plate is visually detected by the bottom detection camera. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1The schematic diagram of the three-dimensional structure of the present application;

[0026] Figure 2 The schematic diagram of the structure of the storage assembly in the present application;

[0027] Figure 3 The schematic diagram of the structure of the bottom of the storage assembly in the present application;

[0028] Figure 4 The schematic diagram of the structure of the feeding assembly in the present application;

[0029] Figure 5 The schematic diagram of the structure of the detection assembly in the present application;

[0030] Figure 6 The schematic diagram of the structure of the auxiliary assembly in the present application;

[0031] Figure 7 The schematic diagram of the structure of the front end of the adsorption component in the present application;

[0032] Figure 8 The schematic diagram of the structure of the rear end of the adsorption component in the present application.

[0033] In the figure: 1, conveyor; 2, production mechanism; 21, storage assembly; 211, positioning component; 2111, base; 2112, positioning frame; 2113, belt wheel; 2114, belt; 2115, first servo motor; 212, feeding; 2121, supporting plate; 2122, balance bar; 2123, bottom plate; 2124, second servo motor; 2125, lead screw; 22, feeding assembly; 221, gantry; 222, double-shaft air cylinder; 223, rotary air cylinder; 224, cross frame; 225, adjusting frame; 226, first suction cup; 23, detection assembly; 231, stand; 232, lower support; 233, bottom detection camera; 234, upper support; 235, top detection camera; 24, auxiliary assembly; 241, overturning component; 2411, shaft frame; 2412, shaft rod; 2413, third upper servo motor; 2414, supporting arm; 242, adsorption component; 2421, frame; 2422, first long rod; 2423, second long rod; 2424, short rod; 2425, sliding plate; 2426, second suction cup; 2427, sliding block; 2428, air cylinder. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Please refer to Figure 1 Figure 8 The application provides a technical scheme: a frozen room air duct cover plate production device and method, including a conveyor 1, the conveyor 1 is provided with a production mechanism 2 and is used for cover plate processing, the production mechanism 2 includes:

[0036] The storage assembly 21 includes a positioning component 211 arranged on the left side of the conveyor 1 and is used for cover plate positioning, and a feeding device 212 is arranged on the positioning component 211 and is used for cover plate feeding;

[0037] The feeding assembly 22 is arranged on the storage assembly 21 and is used for cover plate feeding;

[0038] The detection assembly 23 is arranged in front of the upper end of the conveyor 1 and is used for cover plate detection;

[0039] The auxiliary assembly 24 includes a turnover component 241 arranged on the rear of the upper end of the conveyor 1 and is used for cover plate turnover, and a suction component 242 is arranged on the turnover component 241 and is used for cover surface suction.

[0040] In the embodiment, the positioning component 211 of the storage assembly 21 first accurately positions the stacked cover plates, and the feeding device 212 lifts the cover plates layer by layer to the material taking station; the feeding assembly 22 transfers the cover plates to the conveyor 1 through the pneumatic suction and rotating mechanism; after the detection assembly 23 visually detects the top surface of the cover plate, the turnover component 241 of the auxiliary assembly 24 drives the suction component 242 to complete the cover plate turnover, so as to detect the bottom surface; the reasonable layout of each assembly along the conveyor 1 forms a high-efficiency flow production system; secondly, the positioning and feeding mechanism of the storage assembly 21 ensures the accurate feeding of the material; thirdly, the cooperation of the feeding assembly 22 and the turnover component 241 realizes the front and back detection requirements of the cover plate; this modular design not only closely connects each process, but also can be flexibly adjusted according to the processing requirements of cover plates of different specifications, significantly improves the production efficiency and the consistency of product quality.

[0041] ​Specifically, the adsorption component 242 comprises a frame 2421 arranged on the turnover component 241, two first long rods 2422 are cross-rotatably arranged at the middle of the front end of the frame 2421, two second long rods 2423 are cross-rotatably arranged at the outer sides of the first long rods 2422 and are hinged to the first long rods 2422, short rods 2424 are hinged to the outer sides of the second long rods 2423, the outer sides of the two short rods 2424 are hinged to each other, the front ends of the intersections of the two first long rods 2422, the two second long rods 2423 and the two short rods 2424 are rotatably arranged with sliding plates 2425, the two sides of the front end of each sliding plate 2425 is arranged with a second suction disc 2426, the two ends of each sliding plate 2425 are fixed with sliding blocks 2427 and are slidably connected with the frame 2421, and one end of the frame 2421 is arranged with a gas cylinder 2428 and is used to drive one of the sliding plates 2425 to move.

[0042] In this embodiment, when the gas cylinder 2428 drives the rightmost sliding plate 2425 to move, the sliding plate 2425 drives the first long rod 2422 to rotate through the hinged cooperation of the short rod 2424 and the second long rod 2423, thereby synchronously moving the remaining sliding plates 2425, and the middle sliding plate 2425 remains in a fixed position and only the two side sliding plates 2425 perform symmetrical displacement, so as to realize the accurate adjustment of the distance between the second suction discs 2426 and ensure the uniform distribution of the adsorption force.

[0043] Specifically, the turnover component 241 comprises an axle bracket 2411 fixed on the conveyor 1, an axle rod 2412 is rotatably arranged between the two ends of the axle bracket 2411, the axle bracket 2411 is arranged at one end with a third upper servo motor 2413 and is used to drive the axle rod 2412 to rotate, the outer wall of the axle rod 2412 is fixed with a support arm 2414, and the frame 2421 is fixed on the axle rod 2412.

[0044] In this embodiment, when the third upper servo motor 2413 drives the axle rod 2412 to rotate, the support arm 2414 fixed on the axle rod 2412 drives the entire adsorption component 242 to perform a precise 90-degree turnover motion; through the cooperative operation of the turnover component 241 and the adsorption component 242, not only is the process requirement of double-sided detection of the cover plate realized, but also the smooth turnover motion avoids the damage or deformation of the surface of the cover plate, meanwhile, the programmable control characteristics of the servo motor enable the turnover speed and angle to be flexibly adjusted according to different product requirements, thereby greatly improving the adaptability and production efficiency of the equipment.

[0045] Specifically, the detection assembly 23 comprises an upright support 231 fixed on the conveyor 1, a lower support 232 is fixed on the outer wall of the middle of the upright support 231, a bottom detection camera 233 is transversely arranged on the lower support 232, a lower support 232 is fixed on the outer wall of the upper end of the upright support 231, and a top detection camera 235 is longitudinally arranged on the lower support 232.

[0046] In this embodiment, the lower support 232 fixed on the stand 231 carries the transversely arranged bottom detection camera 233 and the longitudinally arranged top detection camera 235 respectively, forming a cross detection layout; the top surface of the cover placed on the conveyor 1 is visually detected by the top detection camera 235, and the bottom surface of the cover after 90° overturning is visually detected by the bottom detection camera 233.

[0047] Specifically, the positioning component 211 includes a base 2111 arranged on the left side of the conveyor 1, a positioning frame 2112 is slidingly installed around the upper end of the base 2111, a wheel 2113 is rotatably installed around the bottom of the base 2111, a belt 2114 is installed between the left and right two wheels 2113 and the front and rear two wheels 2113, and the two ends of the two belts 2114 are fixed with the lower end of the positioning frame 2112 around, and the lower end of the base 2111 is installed with two first servo motors 2115 for driving the left and right and front and rear wheels 2113 to rotate respectively.

[0048] In this embodiment, the two first servo motors 2115 drive the left and right and front and rear wheels 2113 to rotate respectively, drive the belt 2114 to move synchronously, and make the positioning frame 2112 fixed at both ends of the belt 2114 slide symmetrically towards or reversely along the base 2111; through the cooperative work with the supporting plate 2121 of the feeding assembly 212, not only the neat arrangement of the cover plate stack is ensured, but also the dynamic adjustment of the positioning process according to the production demand is realized due to the programmable control characteristics, which greatly improves the adaptability and positioning efficiency of the equipment to different specifications of products, and provides reliable guarantee for the subsequent material taking process.

[0049] Specifically, the feeding assembly 212 further includes a supporting plate 2121 arranged above the middle of the base 2111, a balance rod 2122 is fixed at the bottom of each corner of the supporting plate 2121, and the balance rod 2122 is slidingly connected with the base 2111, a bottom plate 2123 is fixed between the bottoms of the four balance rods 2122, a second servo motor 2124 is installed at the bottom of the bottom plate 2123, a lead screw 2125 is fixed at the output end of the second servo motor 2124, the outer wall of the lead screw 2125 is threadedly connected with the base 2111, and the upper end of the lead screw 2125 is rotatably connected with the supporting plate 2121.

[0050] In this embodiment, the second servo motor 2124 drives the lead screw 2125 to rotate, drives the bottom plate 2123 to ascend and descend through the thread cooperation between the lead screw 2125 and the base 2111, and ensures that the supporting plate 2121 always maintains a horizontal state and smoothly ascends under the guidance of the four balance rods 2122 penetrating the base 2111.

[0051] Specific, the feeding assembly 22 includes gantry 221 fixed on the top of the base 2111, the upper end of the gantry 221 is provided with a double shaft air cylinder 222, the lower output end of the double shaft air cylinder 222 is provided with a rotary air cylinder 223, the lower output end of the rotary air cylinder 223 is fixed with a cross beam 224, the two ends of the cross beam 224 are both fixed with an adjusting frame 225, and the two ends of the double shaft air cylinder 222 are both provided with a first suction disc 226.

[0052] In the embodiment, the double shaft air cylinder 222 first drives the rotary air cylinder 223 to descend, so that the left first suction disc 226 accurately contacts and adsorbs the cover plate on the uppermost layer of the supporting plate 2121; then the rotary air cylinder 223 drives the cross beam 224 to complete 180-degree accurate rotation, so that the cover plate is transferred to above the conveyor 1; finally, the double shaft air cylinder 222 acts again to stably place the cover plate on the conveyor 1; the consecutive actions of taking material-rotating-placing material are realized; through the cooperation with the feeding assembly 212 and the conveyor 1, seamless connection of the cover plate from feeding to conveying is realized.

[0053] The application further discloses a production method of the cover plate of the freezing chamber air duct.

[0054] S1, first, the cover plates are stacked on the feeding assembly 212, and are positioned by the positioning component 211, and then the feeding assembly 212 continuously and intermittently feeds the stacked cover plates;

[0055] S2, then the feeding assembly 22 is used for grabbing the cover plate stacked on the uppermost layer and rotating 180 degrees to the conveyor 1, and then the conveyor 1 is used for conveying the cover plate to the detection assembly 23 and visually detecting the top surface of the cover plate;

[0056] S3, finally, the suction component 242 is controlled by the turnover component 241 to turn downward and adsorb and fix the cover plate, and then the turnover component 241 is used for controlling the cover plate adsorbed and fixed by the suction component 242 to turn upward by 90 degrees to the back of the detection assembly 23 and visually detect the bottom surface of the cover plate.

[0057] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0058] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A freezer duct cover production apparatus, comprising a conveyor (1), characterized in that: The conveyor (1) is equipped with a production mechanism (2) for processing cover plates. The production mechanism (2) includes: The storage assembly (21) includes a positioning component (211) disposed on the left side of the conveyor (1) and used for positioning the cover plate. The positioning component (211) is provided with a feeding component (212) and used for feeding the cover plate. A feeding assembly (22) is disposed on the storage assembly (21) and used for feeding the cover plate; The detection component (23) is located at the front of the upper end of the conveyor (1) and is used for cover plate detection; The auxiliary component (24) includes a flipping component (241) disposed at the upper rear of the conveyor (1) and used for flipping the cover plate. An adsorption component (242) is disposed on the flipping component (241) and used for adsorption of the cover plate.

2. The freezer duct cover production apparatus according to claim 1, characterized in that: The adsorption component (242) includes a frame (2421) mounted on the flipping component (241). Two first long rods (2422) are rotatably mounted at the center of the front end of the frame (2421). Two second long rods (2423) are rotatably mounted on the outer side of the first long rods (2422), and the second long rods (2423) are hinged to the first long rods (2422). Short rods (2424) are hinged to the outer side of the second long rods (2423). The outer sides are hinged together. At the intersection of the two first long rods (2422), the two second long rods (2423), and the two short rods (2424), a sliding plate (2425) is rotatably mounted on the front end. A second suction cup (2426) is mounted on both sides of the front end of the sliding plate (2425). A slider (2427) is fixed at both ends of the sliding plate (2425) and is slidably connected to the frame (2421). A cylinder (2428) is mounted on one end of the frame (2421) and is used to drive one of the sliding plates (2425) to move.

3. The freezer duct cover production apparatus according to claim 2, characterized in that: The flipping component (241) includes a shaft frame (2411) fixed on the conveyor (1), a shaft rod (2412) is rotatably mounted between the two ends of the shaft frame (2411), a third upper servo motor (2413) is mounted on one end of the shaft frame (2411) and used to drive the shaft rod (2412) to rotate, a support arm (2414) is fixed on the outer wall of the shaft rod (2412), and a frame (2421) is fixed on the shaft rod (2412).

4. The freezer duct cover production apparatus according to claim 1, characterized in that: The detection component (23) includes a stand (231) fixed on the conveyor (1), a lower support (232) fixed on the outer wall of the middle part of the stand (231), a bottom detection camera (233) horizontally mounted on the lower support (232), a lower support (232) fixed on the outer wall of the upper end of the stand (231), and a top detection camera (235) vertically mounted on the lower support (232).

5. The freezer duct cover production apparatus according to claim 1, characterized in that: The positioning component (211) includes a base (2111) disposed on the left side of the conveyor (1). Positioning frames (2112) are slidably installed around the upper end of the base (2111). Pulleys (2113) are rotatably installed around the bottom of the base (2111). Belts (2114) are installed between the left and right two pulleys (2113) and between the front and rear two pulleys (2113). The two ends of the two belts (2114) are respectively fixed to the lower end of the positioning frames (2112) around the base. Two first servo motors (2115) are installed at the lower end of the base (2111) and are used to drive the left and right and front and rear pulleys (2113) to rotate respectively.

6. The freezer duct cover production apparatus according to claim 5, characterized in that: The feeding (212) also includes a support plate (2121) set in the middle of the upper part of the base (2111). The four corners of the bottom of the support plate (2121) are fixed with balance bars (2122), and the balance bars (2122) are slidably connected to the base (2111). A base plate (2123) is fixed between the bottoms of the four balance bars (2122). A second servo motor (2124) is installed at the bottom of the base plate (2123). A lead screw (2125) is fixed at the output end of the second servo motor (2124), and the outer wall of the lead screw (2125) is threaded to the base (2111). The upper end of the lead screw (2125) is rotatably connected to the support plate (2121).

7. The freezer duct cover production apparatus according to claim 5, characterized in that: The feeding assembly (22) includes a gantry frame (221) fixed to the top of the base (2111). A dual-axis cylinder (222) is installed on the upper end of the gantry frame (221). A rotary cylinder (223) is installed at the lower output end of the dual-axis cylinder (222). A crossbeam (224) is fixed at the lower output end of the rotary cylinder (223). An adjusting frame (225) is fixed at both ends of the crossbeam (224). A first suction cup (226) is installed at both ends of the dual-axis cylinder (222).

8. A method for producing a freezer compartment air duct cover, characterized in that: The apparatus for producing freezer duct covers according to any one of claims 1-7 specifically includes the following steps: S1, firstly, the cover plate is stacked on the feeder (212), and the positioning component (211) limits it, and then the feeder (212) continuously and intermittently feeds the stacked cover plate. S2, then the top cover plate is grabbed by the feeding assembly (22), rotated 180 degrees and sent to the conveyor (1), and then sent to the detection assembly (23) directly below the cover plate for visual inspection; S3. Finally, the adsorption component (242) is flipped downward by the flipping component (241) and the cover surface is adsorbed and fixed. Then, the cover surface adsorbed and fixed on the adsorption component (242) is flipped upward by 90 degrees by the flipping component (241) to the back of the detection component (23) and the bottom surface of the cover surface is visually inspected.

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