A ceramic sheet double-sided defect detection device

Abstract

The utility model relates to a kind of ceramic sheet double-sided flaw detection equipment, including inlet flow line, step type carrying unit, front detection subassembly, turnover mechanism, back detection subassembly and outlet flow line, inlet flow line, step type carrying unit and outlet flow line are sequentially arranged along the first horizontal shaft;Step type carrying unit includes positioning assembly and moving assembly, positioning assembly includes the multiple support platform equidistantly distributed along the first horizontal shaft, support platform sequentially includes front detection support platform, back detection support platform and centering support platform, the center distance between adjacent two support platforms is the step distance of moving assembly;Front detection subassembly is located above front detection support platform, turnover mechanism is located at the side of front detection support platform, back detection subassembly is located above back detection support platform.This ceramic sheet double-sided flaw detection equipment structure is compact, and can quickly detect the appearance flaw of the two sides of ceramic sheet and carry out sorting.

Description

Technical Field

[0001] This utility model relates to the field of sorting equipment technology, and in particular to a double-sided defect detection device for ceramic sheets. Background Technology

[0002] Ceramic wafers are a crucial component of power semiconductor packaging materials for new energy applications. Their manufacturing process is extremely complex, resulting in low yields and making them prone to defects that significantly impact usability. In practical applications, both sides of the ceramic wafer must be inspected.

[0003] Chinese patent CN118904767A discloses a panel inspection device. It uses an infeed conveyor assembly to feed panels, and a large-field-of-view CCD is positioned above the loading position of the flipping loading assembly. The large-field-of-view CCD captures images of the unloading position of the infeed conveyor assembly to determine if the product needs to be flipped. Panels are transferred to multiple workstations via loading and unloading transport modules, and qualified panels are discharged via an unloading conveyor line. However, the loading and unloading transport modules have multiple independently operating adsorption and transport structures, resulting in a large component input. The large-field-of-view CCD is only used to distinguish between the front and back sides and determine whether flipping is necessary. The inspection component only inspects one specific side; the panel does not flip back, so it cannot inspect both sides.

[0004] Therefore, a new testing device is needed to solve the above problems. Utility Model Content

[0005] The main objective of this invention is to provide a double-sided defect detection device for ceramic sheets, which has a compact structure and can quickly detect and sort defects on both sides of ceramic sheets.

[0006] The present invention achieves the above objectives through the following technical solution: a ceramic tile double-sided defect detection device, comprising an infeed flow line, a stepping conveyor unit, a front detection component, a flipping mechanism, a back detection component, and an outlet flow line, wherein the infeed flow line, the stepping conveyor unit, and the outlet flow line are arranged sequentially along a first horizontal axis;

[0007] The stepping transport unit includes a positioning component and a moving component. The positioning component includes multiple trays equidistantly distributed along a first horizontal axis. The trays sequentially include a front detection tray, a back detection tray, and a centering tray. The center distance between two adjacent trays is the stepping distance of the moving component.

[0008] The front detection component is located above the front detection platform, and the front detection platform includes a first carrier and a first lifting mechanism for driving the first carrier to rise and fall.

[0009] The first horizontal axis is perpendicular to the second horizontal axis. The flipping mechanism is located on one side of the front detection platform on the second horizontal axis and includes a telescopic drive, a flipping motor and a micro-motion gripper. The telescopic drive drives the flipping motor to move along the second horizontal axis, and the flipping motor drives the micro-motion gripper to rotate around the second horizontal axis. The first carrier has a notch near the micro-motion gripper.

[0010] The reverse side detection component is located above the reverse side detection tray.

[0011] Specifically, the flipping mechanism further includes a lifting drive component, which drives the telescopic drive component to move up and down.

[0012] Specifically, the moving component includes a transport lifting module, a transport translation module, a strip fixing plate, and multiple suction cup holders. The length direction of the strip fixing plate is along a first horizontal axis, and the multiple suction cup holders are fixed to the strip fixing plate with a step distance as the center distance. The transport lifting module drives the transport translation module to lift and lower, and the transport translation module drives the strip fixing plate to translate along the first horizontal axis. The distance between adjacent support platforms is not less than the width of the suction cup holders.

[0013] Specifically, the front detection assembly includes a gantry, a shooting and translation module, two vision mechanisms, and two strip light sources. The gantry spans above the front detection platform. The shooting and translation module is located on the upper part of the gantry and drives all vision mechanisms and all strip light sources to move along a second horizontal axis. The detection direction of the vision mechanism and the illumination direction of the strip light source are both towards the front detection platform, and the illumination direction of the strip light source is perpendicular to the optical axis of its corresponding vision mechanism. Four light-blocking plates are arranged around the middle of the gantry.

[0014] Specifically, the reverse detection assembly includes a support frame and a third vision mechanism disposed on the upper part of the support frame. The third vision mechanism is located above the reverse detection platform. The reverse detection platform includes a second carrier and a backlight. The backlight is located below the second carrier and provides upward illumination. The second carrier is connected to the lower part of the support frame.

[0015] Specifically, the centering platform includes a third carrier and centering grippers, which center the ceramic pieces on the third carrier from four sides.

[0016] Specifically, the platform also includes a transfer platform located at the feed inlet of the discharge flow line. The transfer platform includes a fourth carrier and a second lifting mechanism for driving the fourth carrier to rise and fall. The discharge flow line includes a pair of belt conveyors arranged parallel to the first horizontal axis. The fourth carrier is located at the feed end of the discharge flow line and is situated between the two belt conveyors.

[0017] Specifically, it also includes a feeding hopper and a feeding mechanism. The feeding mechanism includes a first translation module, a first lifting module and a first material transfer suction head. The first translation module drives the first lifting module to move along a first horizontal axis, and the first lifting module drives the first material transfer suction head to rise and fall. The first material transfer suction head moves between above the feeding hopper and above the infeed flow line.

[0018] Specifically, it also includes a feeding mechanism, a feeding bin, and an NG bin. The NG bin and the feeding bin are located on opposite sides of the discharge flow line. The feeding mechanism includes a second translation module, a second lifting module, and a second material transfer suction head. The second translation module drives the second lifting module to move along a second horizontal axis, and the second lifting module drives the second material transfer suction head to move up and down. The second material transfer suction head moves between the top of the NG bin and the top of the feeding bin.

[0019] Furthermore, the NG bin includes a translation mechanism and several waste storage locations arranged in an array. The translation mechanism synchronously controls all waste storage locations to move along a first horizontal axis.

[0020] The beneficial effects of this utility model's technical solution are:

[0021] This ceramic tile double-sided defect detection device 100 has a compact structure and can quickly detect and sort ceramic tiles for defects on both sides. Attached Figure Description

[0022] Figure 1 A perspective view of the core components of the ceramic sheet double-sided defect detection equipment in this embodiment;

[0023] Figure 2 A 3D view of the feeding mechanism;

[0024] Figure 3 This is a diagram showing the relative positions of the feed flow line, the stepping conveyor unit, the flipping mechanism, and the reverse side detection component.

[0025] Figure 4 This is a diagram showing the relative positions of the stepping conveyor unit and the tilting mechanism;

[0026] Figure 5 A 3D view of the front detection component;

[0027] Figure 6 This is a 3D view of the feeding mechanism;

[0028] Figure 7 This is a 3D view of the NG warehouse.

[0029] The numbers in the diagram represent:

[0030] 100-Ceramic tile double-sided defect detection equipment,

[0031] 1a - Loading bin, 1b - Unloading bin;

[0032] 2a-Feeding mechanism, 21a-First translation module, 22a-First lifting module, 23a-First material transfer suction head;

[0033] 2b - Feeding mechanism, 21b - Second translation module, 22b - Second lifting module, 23b - Second material transfer suction head;

[0034] 3a - Feed flow line, 3b - Discharge flow line;

[0035] 4-Stepping transport unit, 41-Front-side inspection platform, 411-First carrier, 4111-Notch, 412-First lifting mechanism, 42-Reverse-side inspection platform, 421-Second carrier, 422-Backlight, 43-Centering platform, 431-Third carrier, 432-Centering gripper, 44-Transfer platform, 441-Fourth carrier, 442-Second lifting mechanism, 45-Transport lifting module, 46-Transporting translation module, 47-Strip fixing plate, 48-Suction cup frame;

[0036] 5-Front-end detection component, 51-Gantry, 52-Image translation module, 53a-First vision mechanism, 53b-Second vision mechanism, 54a-First strip light source, 54b-Second strip light source, 55-Light blocking plate;

[0037] 6-Tilting mechanism, 61-Telescopic drive component, 62-Tilting motor, 63-Micro-motion gripper, 64-Lifting drive component;

[0038] 7-Reverse detection component, 71-Support frame, 72-Third vision mechanism;

[0039] 8-NG bin, 81-Transfer mechanism, 82-Scrap material location;

[0040] 200-Ceramic sheet. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to specific embodiments.

[0042] Example:

[0043] like Figure 1 As shown, the present invention provides a ceramic tile double-sided defect detection device 100, which includes a feeding bin 1a, a feeding mechanism 2a, a feeding flow line 3a, a stepping conveying unit 4, a front detection component 5, a flipping mechanism 6, a back detection component 7, a discharge flow line 3b, a discharge mechanism 2b, a discharge bin 1b, and an NG bin 8.

[0044] The feeding hopper 1a is used for feeding ceramic sheets, and the unloading hopper 1b is used for unloading good products. These two hoppers have basically the same structure, but they are raised and lowered progressively to accommodate the picking or placement height of the ceramic sheets 200. The NG hopper 8 is used for unloading defective products. The feeding mechanism 2a moves the ceramic sheets from the feeding hopper 1a to the infeed flow line 3a, and the unloading mechanism 2b moves the inspected ceramic sheets from the unloading flow line 3b to the unloading hopper 1b or the NG hopper 8. The infeed flow line 3a feeds the ceramic sheets into the stepping conveyor unit 4, which passes the front inspection component 5, the flipping mechanism 6, and the back inspection component 7 before finally feeding them into the unloading flow line 3b.

[0045] like Figure 1 and Figure 2 As shown, the feeding mechanism 2a includes a first translation module 21a, a first lifting module 22a and a first material transfer suction head 23a. The first translation module 21a drives the first lifting module 22a to move along the second horizontal axis, and the first lifting module 22a drives the first material transfer suction head 23a to rise and fall. The first material transfer suction head 23a moves between the top of the feeding bin 1a and the top of the infeed flow line 3a.

[0046] Although ceramic sheets 200 can be directly fed from other production lines imported into the feed line 3a, the loading mechanism 2a provides another method of automatic loading via the loading bin 1a. The first transfer suction head 23a is used to pick up a ceramic sheet 200 from the top of the loading bin 1a and place it into the feed section of the feed line 3a. The first translation module 21a is used to realize the translational movement of the first transfer suction head 23a during the suction and release process. The first lifting module 22a is used to realize the lifting and lowering movement of the first transfer suction head 23a during the suction and release process.

[0047] like Figure 1 , Figure 3 and Figure 4As shown, the infeed flow line 3a, the stepping conveyor unit 4, and the discharge flow line 3b are arranged sequentially along the first horizontal axis. The stepping conveyor unit 4 includes a positioning component and a moving component. The positioning component includes four platforms equidistantly distributed along the first horizontal axis. The four platforms are, in sequence, a front detection platform 41, a back detection platform 42, a centering platform 43, and a transfer platform 44. The transfer platform 44 is located at the infeed point of the discharge flow line 3b, and the center distance between two adjacent platforms is the step distance of the moving component. The moving component includes a conveying lifting module 45, a conveying translation module 46, a strip fixing plate 47, and four suction cup holders 48. The length direction of the strip fixing plate 47 is along the first horizontal axis, and the four suction cup holders 48 are fixed to the strip fixing plate 47 with a center distance equal to the step distance. The conveying lifting module 45 drives the conveying translation module 46 to lift and lower, and the conveying translation module 46 drives the strip fixing plate 47 to translate along the first horizontal axis. The distance between adjacent trays is not less than the width of the suction cup holder 48. The front detection component 5 is located above the front detection tray 41, the flipping mechanism 6 is located on one side of the front detection tray 41, and the back detection component 7 is located above the back detection tray 42.

[0048] Because both sides of the ceramic sheet 200 need to be inspected, the front inspection platform 41 and the back inspection platform 42 need to provide bottom support for each inspection. The ceramic sheet 200 undergoes a flipping process between these two platforms, so the flipping will not cause the ceramic sheet 200 to fall out of the field of view of the back inspection component 7, but it will affect the sorting after inspection. The centering platform 43 adjusts the orientation of the ceramic sheet 200. After the adjustment, the orientation of the ceramic sheet 200 is considered to be determined, which facilitates the correct placement of the ceramic sheet 200 into the unloading bin 1b or NG bin 8. The transfer of the ceramic sheet 200 between the platforms is accomplished by the moving components. Each time the suction cup frame 48 descends to pick up the ceramic sheet 200, the transport lifting module 45 is used to complete the synchronous lifting of the four suction cup frames 48, and the transport translation module 46 is used to complete the synchronous translation of the four suction cup frames 48 (along the first horizontal axis). During front and back inspections, the suction cup holder 48 must be offset from the ceramic plate 200; otherwise, it will affect the shooting of the three vision mechanisms. Therefore, the suction cup holder 48 needs to be positioned in the center of the adjacent support, and the width of the suction cup holder 48 cannot be greater than the distance between the support.

[0049] like Figure 1 and Figure 5As shown, the front detection assembly 5 includes a gantry 51, a shooting and translation module 52, two vision mechanisms (a first vision mechanism 53a and a second vision mechanism 53b), and two strip light sources (a first strip light source 54a and a second strip light source 54b). The gantry 51 spans above the front detection platform 41. The shooting and translation module 52 is located on the upper part of the gantry 51 and drives all vision mechanisms and all strip light sources to move along a second horizontal axis, which is perpendicular to the second horizontal axis. The detection direction of the vision mechanisms and the illumination direction of the strip light sources are both towards the front detection platform 41, and the illumination direction of the first strip light source 54a is perpendicular to the optical axis of the first vision mechanism 53a, and the illumination direction of the second strip light source 54b is perpendicular to the optical axis of the second vision mechanism 53b. Four light-blocking plates 55 are arranged around the middle of the gantry 51.

[0050] The front detection component 5 can be used in situations where the detection accuracy requirement is higher than that of the other side of the ceramic sheet 200. The vision mechanism is used in conjunction with the bar light source; when the corresponding vision mechanism is working, the bar light source provides surface light, thus making the image outline clear. The first vision mechanism 53a and the second vision mechanism 53b can capture images of different positions of the ceramic sheet 200 from different angles, and the two vision mechanisms can be adapted to the shooting position by the shooting translation module 52. During the above translation process, the first bar light source 54a and the second bar light source 54b will move accordingly to ensure a suitable illumination angle. The illumination direction is perpendicular to the shooting direction, thus avoiding residual light from the bar light source from shining into the lens of the vision mechanism and causing color problems in the image of the ceramic sheet 200. The light-blocking plate 55 is used to prevent external natural light from affecting the lighting conditions and ensuring image clarity.

[0051] like Figure 3 and Figure 4 As shown, the front detection platform 41 includes a first carrier 411 and a first lifting mechanism 412 that drives the first carrier 411 to rise and fall. The flipping mechanism 6 is located on one side of the front detection platform 41 on the second horizontal axis and includes a telescopic drive member 61, a flipping motor 62, a micro-motion gripper 63 and a lifting drive member 64. The telescopic drive member 61 drives the flipping motor 62 to move along the second horizontal axis, the flipping motor 62 drives the micro-motion gripper 63 to rotate around the second horizontal axis, and the lifting drive member 64 drives the telescopic drive member 61 to rise and fall. The first carrier 411 has a notch 4111 near the micro-motion gripper 63.

[0052] During frontal inspection, the first carrier 411 serves as the positioning position for the ceramic sheet 200. The flipping mechanism 6 is used to flip the ceramic sheet 200 180° before reverse inspection, ensuring that the other side of the ceramic sheet 200 faces upwards. The notch 4111 provides a position for the micro-motion gripper 63 to move to the lower surface of the ceramic sheet 200, allowing the micro-motion gripper 63 to grip both sides of the ceramic sheet 200, and then the flipping motor 62 completes the flipping of the ceramic sheet 200. During shooting, the telescopic drive 61 is used to retract the micro-motion gripper 63 out of the shooting range; during flipping, the first lifting mechanism 412 and the lifting drive 64 will cause the first carrier 411 and the micro-motion gripper 63 to be displaced at different heights, so that the ceramic sheet 200 is not knocked off or dislodged by the first carrier 411 during the flipping process.

[0053] like Figure 3 and Figure 4 As shown, the reverse detection assembly 7 includes a support frame 71 and a third vision mechanism 72 disposed on the upper part of the support frame 71. The third vision mechanism 72 is located above the reverse detection platform 42. The reverse detection platform 42 includes a second carrier 421 and a backlight 422. The backlight 422 is located below the second carrier 421 and provides upward illumination. The second carrier 421 is connected to the lower part of the support frame 71.

[0054] The third vision mechanism 72, compared to the first vision mechanism 53a and the second vision mechanism 53b, provides a wide-angle shooting method suitable for detecting obvious defects in the entire ceramic piece 200. Because the third vision mechanism 72 has a large field of view, slight directional deviations of the ceramic piece 200 do not affect its recognition. During reverse inspection, the second carrier 421 provides support for the ceramic piece 200, and the backlight 422 provides backlighting, thereby making the edges of the ceramic piece 200 clear and easily identifiable through color contrast. Since the second carrier 421 and the backlight 422 themselves do not need to move, they only need to be connected to the support frame 71 nearby.

[0055] like Figure 3 and Figure 4 As shown, the centering platform 43 includes a third carrier 431 and a centering gripper 432. The centering gripper 432 centers the ceramic piece 200 on the third carrier 431 from four sides.

[0056] The third carrier 431 is used to provide support for the ceramic piece 200 during the centering operation. The centering gripper 432 centers the ceramic piece 200 from both front-to-back and left-to-right directions. Although the rotation axis of the micro-motion gripper 63 is theoretically along the second horizontal axis, it may not coincide with the center of symmetry of the ceramic piece 200. Therefore, after flipping, the position of the ceramic piece 200 will have a slight deviation. However, the ceramic piece 200 requires accurate positioning during sorting, so the centering gripper 432 is needed to complete one centering operation.

[0057] like Figure 3 As shown, the transfer platform 44 includes a fourth carrier 441 and a second lifting mechanism 442 for driving the fourth carrier 441 to rise and fall. The discharge flow line 3b includes a pair of belts arranged parallel to the first horizontal axis. The fourth carrier 441 is located at the feed end of the discharge flow line 3b and is between the two belts.

[0058] The fourth carrier 441 also supports the ceramic sheet 200. Its position is offset from the conveyor belt to prevent interference between the falling and translating of the ceramic sheet 200. There may be a height difference between the conveying height of the discharge flow line 3b and the conveying height of the stepping conveyor unit 4. Therefore, the fourth carrier 441 can receive the ceramic sheet 200 at a slightly higher position before lowering it onto the discharge flow line 3b. Because the discharge flow line 3b needs to pause when sorting the ceramic sheet 200, this rhythm may not be consistent with the rhythm of the stepping conveyor unit 4 delivering the ceramic sheet 200. To avoid unnecessary waiting time, the fourth carrier 441 will temporarily store the ceramic sheet 200 and then lower it when the discharge flow line 3b pauses.

[0059] like Figure 1 and Figure 6 As shown, the NG bin 8 and the unloading bin 1b are respectively located on both sides of the discharge flow line 3b. The unloading mechanism 2b includes a second translation module 21b, a second lifting module 22b, and a second material transfer suction head 23b. The second translation module 21b drives the second lifting module 22b to move along the second horizontal axis, and the second lifting module 22b drives the second material transfer suction head 23b to rise and fall. The second material transfer suction head 23b moves between the top of the NG bin 8 and the top of the unloading bin 1b.

[0060] Although qualified ceramic sheets 200 can be directly sent to subsequent production lines via discharge flow line 3b, the unloading mechanism 2b and unloading bin 1b provide another way to unload into the unloading bin 1b. The composition and movement principle of the unloading mechanism 2b are basically the same as those of the loading mechanism 2a, although the dimensions may differ slightly. Based on the detection results of the front detection component 5 and the back detection component 7, the unloading mechanism 2b selectively moves the ceramic sheets 200 from the discharge flow line 3b to the NG bin 8 and the unloading bin 1b. The arrangement of the NG bin 8 and the unloading bin 1b ensures that the movement cycle of the ceramic sheets 200 to both sides of the discharge flow line 3b remains basically consistent, resulting in a balanced sorting rhythm.

[0061] like Figure 1 and Figure 7 As shown, the NG bin 8 includes a translation mechanism 81 and several waste positions 82, which are arranged in an array. The translation mechanism 81 synchronously controls all waste positions 82 to move along the first horizontal axis.

[0062] When inspecting both sides of the ceramic sheet 200, it can not only distinguish between qualified and unqualified products, but also differentiate between defect types. Therefore, after completing the inspection of both sides, this equipment can also place defective products into the corresponding waste storage positions 82 according to their defect type for subsequent processing. Because the feeding mechanism 2b itself has a degree of freedom along the second horizontal axis, the translation mechanism 81 only needs to have a degree of freedom along the first horizontal axis to allow defective products to be placed in all waste storage positions 82. Even if there are many types of defective products, the array layout of the waste storage positions 82 can still be relatively compact.

[0063] The working process of the ceramic tile double-sided defect detection equipment 100 is as follows:

[0064] 1. The worker stacks the ceramic pieces 200 to be tested on the feeding hopper 1a. The feeding hopper 1a supplies the ceramic pieces 200 upwards. The first transfer suction head 3a takes a ceramic piece 200 from the top and moves it to the feeding section of the feed flow line 3a. The feeding hopper 1a raises the remaining ceramic pieces 200 by the thickness of one ceramic piece 200. The feed flow line 3a moves the ceramic pieces 200 to the picking position of the first suction cup frame. The first suction cup frame moves it onto the first carrier 411.

[0065] 2. The first lifting mechanism 412 brings the first vehicle 411 to the shooting height. Then, with the assistance of the first strip light source 54a, the first vision mechanism 53a completes the first stage of frontal detection, and the detection information is uploaded to the control system. Then, the shooting translation module 52 moves the second vision mechanism 53b to a suitable position, and with the help of the second strip light source 54b, the second stage of frontal detection is carried out, and the detection information is uploaded to the control system again.

[0066] 3. The first lifting mechanism 412 raises the first carrier 411 to the clamping height of the micro-moving gripper 63. The open micro-moving gripper 63 extends to the notch 4111 under the drive of the telescopic drive member 61 and clamps the upper and lower sides of the ceramic piece 200. The first lifting mechanism 412 lowers the first carrier 411 to a position that does not affect the flipping. The lifting drive member 64 can also adjust the height of the micro-moving gripper 63 appropriately. Then the flipping motor 62 flips the micro-moving gripper 63 holding the ceramic piece 200 180°. Then the first carrier 411 rises and supports the ceramic piece 200 again. The second suction cup frame moves the ceramic piece 200 to the second carrier 421.

[0067] 4. With the assistance of the backlight 422, the third vision mechanism 72 performs reverse detection on the ceramic piece 200 on the second carrier 421. The detection information is then uploaded to the control system. The control system analyzes all the detection information and then generates a sorting command.

[0068] 5. The third suction cup holder transfers the ceramic sheet 200 to the third carrier 431. When the third suction cup holder places the ceramic sheet 200 on the third carrier 431, the centering gripper 432 is in the open state. Then the centering gripper 432 centers the ceramic sheet 200. Then the fourth suction cup holder transfers the ceramic sheet 200 to the fourth carrier 441. When the discharge flow line 3b stops, the second lifting mechanism 442 causes the fourth carrier 441 to descend, so that the ceramic sheet 200 falls into the inlet section of the discharge flow line 3b. Then the discharge flow line 3b moves the ceramic sheet 200 below the unloading mechanism 2b.

[0069] 6. According to the sorting command, the second transfer suction head 23b places the ceramic sheet 200 into the waste position 82 of the NG bin 8 or the feeding bin 1b. For each ceramic sheet 200 placed into the feeding bin 1b, all the ceramic sheets 200 in it will drop by the thickness of one ceramic sheet 200.

[0070] In summary, this ceramic tile double-sided defect detection device 100 has a compact structure and can quickly detect and sort ceramic tiles with defects on both sides.

[0071] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A double-sided defect detection device for ceramic tiles, characterized in that: It includes an infeed flow line, a stepping conveyor unit, a front detection component, a flipping mechanism, a back detection component, and an outfeed flow line, wherein the infeed flow line, the stepping conveyor unit, and the outfeed flow line are arranged sequentially along a first horizontal axis; The stepping transport unit includes a positioning component and a moving component. The positioning component includes multiple trays equidistantly distributed along a first horizontal axis. The trays sequentially include a front detection tray, a back detection tray, and a centering tray. The center distance between two adjacent trays is the stepping distance of the moving component. The front detection component is located above the front detection platform, and the front detection platform includes a first carrier and a first lifting mechanism for driving the first carrier to rise and fall. The first horizontal axis is perpendicular to the second horizontal axis. The flipping mechanism is located on one side of the front detection platform on the second horizontal axis and includes a telescopic drive, a flipping motor and a micro-motion gripper. The telescopic drive drives the flipping motor to move along the second horizontal axis, and the flipping motor drives the micro-motion gripper to rotate around the second horizontal axis. The first carrier has a notch near the micro-motion gripper. The reverse side detection component is located above the reverse side detection tray.

2. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: The flipping mechanism also includes a lifting drive component, which drives the telescopic drive component to move up and down.

3. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: The moving component includes a lifting and transporting module, a translating and transporting module, a strip-shaped fixing plate, and multiple suction cup holders. The length direction of the strip-shaped fixing plate is along a first horizontal axis. The multiple suction cup holders are fixed to the strip-shaped fixing plate with a step distance as the center distance. The lifting and transporting module drives the translating and transporting module to lift and lower, and the translating and transporting module drives the strip-shaped fixing plate to translate along the first horizontal axis. The distance between adjacent support platforms is not less than the width of the suction cup holders.

4. The ceramic sheet double-sided defect inspection apparatus of claim 2, wherein: The front detection assembly includes a gantry, a shooting and translation module, two vision mechanisms, and two strip light sources. The gantry spans above the front detection platform. The shooting and translation module is located on the upper part of the gantry and drives all vision mechanisms and all strip light sources to move along a second horizontal axis. The detection direction of the vision mechanism and the illumination direction of the strip light source are both towards the front detection platform, and the illumination direction of the strip light source is perpendicular to the optical axis of its corresponding vision mechanism. Four light-blocking plates are arranged around the middle of the gantry.

5. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: The reverse detection assembly includes a support frame and a third vision mechanism disposed on the upper part of the support frame. The third vision mechanism is located above the reverse detection platform. The reverse detection platform includes a second carrier and a backlight. The backlight is located below the second carrier and provides upward illumination. The second carrier is connected to the lower part of the support frame.

6. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: The centering platform includes a third carrier and centering jaws, which center the ceramic pieces on the third carrier from four sides.

7. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: The platform also includes a transfer platform located at the feed inlet of the discharge flow line. The transfer platform includes a fourth carrier and a second lifting mechanism for driving the fourth carrier to rise and fall. The discharge flow line includes a pair of belt conveyors arranged parallel to the first horizontal axis. The fourth carrier is located at the feed end of the discharge flow line and is situated between the two belt conveyors.

8. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: It also includes a feeding hopper and a feeding mechanism. The feeding mechanism includes a first translation module, a first lifting module and a first material transfer suction head. The first translation module drives the first lifting module to move along a first horizontal axis. The first lifting module drives the first material transfer suction head to rise and fall. The first material transfer suction head moves between above the feeding hopper and above the feed flow line.

9. The ceramic sheet double-sided defect inspection apparatus of claim 1, wherein: It also includes a feeding mechanism, a feeding bin, and an NG bin. The NG bin and the feeding bin are located on opposite sides of the discharge flow line. The feeding mechanism includes a second translation module, a second lifting module, and a second material transfer suction head. The second translation module drives the second lifting module to move along a second horizontal axis. The second lifting module drives the second material transfer suction head to move up and down. The second material transfer suction head moves between the top of the NG bin and the top of the feeding bin.

10. The ceramic sheet double-sided defect inspection apparatus of claim 9, wherein: The NG bin includes a translation mechanism and several waste storage locations arranged in an array. The translation mechanism synchronously controls all waste storage locations to move along a first horizontal axis.

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