1. A curved surface defect detection device, characterized by, includes:

a frame;

the bearing and conveying table comprises a first bearing and conveying table and a second bearing and conveying table which are respectively positioned at two ends of the rack and is suitable for bearing and conveying the curved surface workpiece to be detected;

the guide mechanism is arranged above the first bearing and conveying table and is suitable for adjusting the curved surface workpieces to be detected to the same posture;

the feeding mechanism is positioned between the first bearing conveying table and the second bearing conveying table; the feeding and discharging device is suitable for detecting feeding and discharging of a curved surface workpiece;

the positioning mechanism comprises a cross motion mechanism arranged on the rack and a clamping piece arranged on the cross motion mechanism and is suitable for adjusting the curved surface workpiece to be detected to the same position;

the detection mechanism comprises a backlight source and a CCD camera which are respectively positioned above and at two sides of the positioning mechanism, and the backlight source and the CCD camera are arranged to meet the reflection law of light;

the backlight source emits an image, the image is projected onto a curved surface workpiece to be detected, the image is distorted after being reflected by the curved surface workpiece to be detected, the CCD camera collects the distorted image, and the surface profile data of the curved surface workpiece to be detected is restored through resolving.

2. The curved surface defect detecting device of claim 1, wherein the image emitted from the backlight source is a plurality of continuously varying sinusoidal stripes.

3. The curved surface defect detecting device of claim 1, wherein the carrying and conveying table comprises a driving mechanism, a transmission belt connected with the driving mechanism, and a flexible supporting plate arranged below the transmission belt.

4. The curved surface defect detecting device of claim 3, wherein the cross-sectional shape of the flexible supporting plate is a concave shape, the conveying belt is positioned in the groove of the flexible supporting plate, and the upper surface of the flexible supporting plate is flush with the upper surface of the conveying belt.

5. The curved surface defect inspection device of claim 1, wherein the feed mechanism comprises: the linear motion module is provided with one end positioned below the tail end of the first bearing and conveying table and the other end positioned at the starting end of the second bearing and conveying table, and the two groups of sliding platforms are positioned above the linear motion module;

and the distance between the two groups of sliding platforms is just half of the stroke of the linear motion module.

6. The curved surface defect inspection device of claim 5, wherein the linear motion module comprises: the U-shaped section feeding device comprises a lower frame body, a feeding motor, a gear box, a synchronizing wheel, a driven wheel, a feeding belt, an upper cover body, two movable sub-seats and a plurality of belt pressing blocks, wherein the lower frame body is fixedly arranged on a rack and has a section shape of U, the feeding motor is arranged at one end of the lower frame body, the gear box is connected with the feeding motor, the synchronizing wheel is connected with the connected gear box, the driven wheel is arranged at the other end of the lower frame body, the feeding belt is sleeved on the synchronizing wheel and the driven wheel, the upper cover body is arranged above the feeding belt, two ends of the upper cover body are fixedly connected with the lower frame body, a preset distance is reserved between two sides of the upper cover body and the lower frame body, the bottom of the upper cover body is fixedly connected with the feeding belt, the middle of the upper cover body penetrates through the upper cover body, the top of the upper cover body is connected with the sliding platform, and the plurality of belt pressing blocks are arranged on the feeding belt.

7. The curved surface defect inspection device of claim 5, wherein the sliding platform comprises: the device comprises a mounting seat fixedly mounted on a rotor seat, a lifting cylinder is mounted inside the mounting seat, an output shaft of the lifting cylinder penetrates through the top of the mounting seat and is connected with a lifting plate, a plurality of limiting guide columns are fixedly mounted at the bottom of the lifting plate and penetrate through the top of the mounting seat through linear bearings, and a plurality of vacuum chucks are mounted at the top of the lifting plate and used for adsorbing and fixing curved surface workpieces.

8. The curved surface defect detecting device of claim 1, wherein the cross motion mechanism is formed by overlapping two sets of linear motion modules perpendicular to each other.

9. The curved surface defect inspection device of claim 1, wherein the pilot mechanism comprises:

the mounting frame is erected above the first bearing and conveying table;

the lifting mechanisms are arranged on two sides of the first bearing conveying table and used for jacking the curved surface workpiece to be detected until the curved surface workpiece to be detected is separated from the first bearing conveying table;

the pushing mechanisms at least comprise four pushing mechanisms which are respectively arranged in four directions of the mounting rack; the pushing mechanism comprises a secondary linear module arranged on the mounting frame and a guide wheel arranged at the output end of the secondary linear module and facing the conveying belt;

when the curved surface workpiece to be detected enters the lifting mechanism, the second-stage linear module drives the guide wheels to move towards the center position of the mounting frame and pushes the curved surface workpiece to be detected to move towards one side of the mounting frame until all the guide wheels are in contact with the outer edge of the curved surface workpiece to be detected, so that the curved surface workpiece to be detected keeps the same position and posture.

Background

The automobile skylight is an essential component for an automobile, is arranged on the roof, can effectively circulate air in the automobile, increases the entering of fresh air, and brings healthy and comfortable enjoyment for an automobile owner. In order to improve the lighting degree and the visual field degree of glass, the existing automobile skylight is generally 3D curved glass, in order to ensure that a qualified automobile skylight can be produced, detection equipment is needed to detect the automobile skylight after the skylight is produced, and therefore high-definition cameras or laser sensors are adopted to detect the automobile skylight in different detection processes.

The existing curved surface detection device adopts a contact type detection method more, the position of a plurality of points on the automobile glass is obtained by fixing the automobile glass and then passing through a plurality of lifting columns, and if the positions of the points on the automobile glass meet the design requirements, the automobile glass is considered to be a synthetic product. Obviously, the measuring device can only be used for detecting whether the surface type of the automobile glass meets the design requirements or not, and cannot acquire the distribution condition of curved surface data of the automobile glass and some tiny defects.

Disclosure of Invention

The purpose of the invention is as follows: the curved surface defect detection device is provided to solve the technical problems involved in the background art.

The technical scheme is as follows: a curved surface defect detection apparatus comprising:

a frame;

the bearing and conveying table comprises a first bearing and conveying table and a second bearing and conveying table which are respectively positioned at two ends of the rack and is suitable for bearing and conveying the curved surface workpiece to be detected;

the guide mechanism is arranged above the first bearing and conveying table and is suitable for adjusting the curved surface workpieces to be detected to the same posture;

the feeding mechanism is positioned between the first bearing conveying table and the second bearing conveying table; the feeding and discharging device is suitable for detecting feeding and discharging of a curved surface workpiece;

the positioning mechanism comprises a cross motion mechanism arranged on the rack and a clamping piece arranged on the cross motion mechanism and is suitable for adjusting the curved surface workpiece to be detected to the same position;

the detection mechanism comprises a backlight source and a CCD camera which are respectively positioned above and at two sides of the positioning mechanism, and the backlight source and the CCD camera are arranged to meet the reflection law of light;

the backlight source emits an image, the image is projected onto a curved surface workpiece to be detected, the image is distorted after being reflected by the curved surface workpiece to be detected, the CCD camera collects the distorted image, and the surface profile data of the curved surface workpiece to be detected is restored through resolving.

Preferably or optionally, the emitted image on the backlight is a plurality of continuously varying sinusoidal stripes.

Preferably or optionally, the bearing and conveying table comprises a driving mechanism, a transmission belt connected with the driving mechanism, and a flexible supporting plate is arranged below the transmission belt.

Preferably or optionally, the cross-sectional shape of the flexible supporting plate is a concave shape, the conveying belt is positioned in the groove of the flexible supporting plate, and the upper surface of the flexible supporting plate is flush with the upper surface of the conveying belt.

Preferably or optionally, the feeding mechanism comprises: the linear motion module is provided with one end positioned below the tail end of the first bearing and conveying table and the other end positioned at the starting end of the second bearing and conveying table, and the two groups of sliding platforms are positioned above the linear motion module;

and the distance between the two groups of sliding platforms is just half of the stroke of the linear motion module.

Preferably or optionally, the linear motion module comprises: the U-shaped section feeding device comprises a lower frame body, a feeding motor, a gear box, a synchronizing wheel, a driven wheel, a feeding belt, an upper cover body, two movable sub-seats and a plurality of belt pressing blocks, wherein the lower frame body is fixedly arranged on a rack and has a section shape of U, the feeding motor is arranged at one end of the lower frame body, the gear box is connected with the feeding motor, the synchronizing wheel is connected with the connected gear box, the driven wheel is arranged at the other end of the lower frame body, the feeding belt is sleeved on the synchronizing wheel and the driven wheel, the upper cover body is arranged above the feeding belt, two ends of the upper cover body are fixedly connected with the lower frame body, a preset distance is reserved between two sides of the upper cover body and the lower frame body, the bottom of the upper cover body is fixedly connected with the feeding belt, the middle of the upper cover body penetrates through the upper cover body, the top of the upper cover body is connected with the sliding platform, and the plurality of belt pressing blocks are arranged on the feeding belt.

Preferably or optionally, the sliding platform comprises: the device comprises a mounting seat fixedly mounted on a rotor seat, a lifting cylinder is mounted inside the mounting seat, an output shaft of the lifting cylinder penetrates through the top of the mounting seat and is connected with a lifting plate, a plurality of limiting guide columns are fixedly mounted at the bottom of the lifting plate and penetrate through the top of the mounting seat through linear bearings, and a plurality of vacuum chucks are mounted at the top of the lifting plate and used for adsorbing and fixing curved surface workpieces.

Preferably or optionally, the cross motion mechanism is formed by overlapping two groups of mutually perpendicular linear motion modules.

Preferably or optionally, the pilot mechanism comprises:

the mounting frame is erected above the first bearing and conveying table;

the lifting mechanisms are arranged on two sides of the first bearing conveying table and used for jacking the curved surface workpiece to be detected until the curved surface workpiece to be detected is separated from the first bearing conveying table;

the pushing mechanisms at least comprise four pushing mechanisms which are respectively arranged in four directions of the mounting rack; the pushing mechanism comprises a secondary linear module arranged on the mounting frame and a guide wheel arranged at the output end of the secondary linear module and facing the conveying belt;

when the curved surface workpiece to be detected enters the lifting mechanism, the second-stage linear module drives the guide wheels to move towards the center position of the mounting frame and pushes the curved surface workpiece to be detected to move towards one side of the mounting frame until all the guide wheels are in contact with the outer edge of the curved surface workpiece to be detected, so that the curved surface workpiece to be detected keeps the same position and posture.

Has the advantages that: the invention relates to a curved surface defect detection device, which transmits an image on a backlight source, projects the image on a curved surface workpiece, causes image distortion after the image is reflected by the curved surface workpiece, and a CCD (charge coupled device) camera acquires a distorted image, wherein the distorted image reflects the surface type information of the curved surface workpiece, and the surface type data of the curved surface workpiece is restored by resolving, so that the detection of the workpiece defect is realized, and the detection efficiency of the curved surface workpiece is improved; the positions and postures of the curved surface workpieces are unified through the guiding mechanism, and the positions of the curved surface workpieces are further corrected and fixed through the positioning mechanism, so that the detection precision of the curved surface workpieces is improved, and the calculation process of resolving and restoring is reduced.

Drawings

Fig. 1 is an external structural view of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic structural diagram of a carrying and conveying table in the invention.

Fig. 4 is a schematic structural view of the pilot mechanism of the present invention.

Fig. 5 is a schematic structural view of the lifting mechanism of the present invention.

Fig. 6 is a schematic structural view of the pushing mechanism of the present invention.

Fig. 7 is a schematic view of the installation of the aligning wheel of the present invention.

Fig. 8 is a schematic structural view of the feeding mechanism in the present invention.

Fig. 9 is a schematic structural view of the positioning mechanism of the present invention.

Fig. 10 is a schematic structural view of the cross motion mechanism of the present invention.

Fig. 11 is a schematic view of the structure of the holder of the present invention.

The reference signs are: a rack 100, a housing 110, a mounting bracket 120;

a first bearing and conveying table 200, a conveying motor 210, a speed reducer 220, a driving shaft 230, a driven shaft 240, a conveying belt 250 and a flexible supporting plate 260;

the device comprises a feeding mechanism 300, a linear motion module 310, a sliding platform 320, a lower frame 311, a feeding motor 312, a gear box 313, an upper cover 314, a rotor base 315, a mounting base 321, a lifting cylinder 322, a lifting plate 323, a limiting guide column 324 and a vacuum chuck 325;

the positioning mechanism 400, the cross motion mechanism 410, the clamping piece 420, the first servo motor 411, the first screw rod 412, the first sliding guide 413, the first sliding seat 414, the second servo motor 415, the second screw rod 416, the second sliding guide 417, the second sliding seat 418, the baffle 421 and the first buffer spring 422;

a detection mechanism 500, a backlight 510, a CCD camera 520;

a second load-bearing transfer table 600;

the guide mechanism 700, the lifting mechanism 710, the first pushing mechanism 720, the second pushing mechanism 730, the mounting plate 711, the lifting motor 712, the lifting screw 713, the lifting guide rail 714, the lifting slider 715, the connecting plate 716, the flexible protrusion 717, the primary linear module 721, the secondary linear module 722, the connecting seat 723, the limit guide post 724, the connecting block 725, the mounting shaft 726 and the second buffer spring 727;

a curved workpiece 800.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

Referring to fig. 1 to 2, a curved surface defect detecting apparatus includes: the machine frame 100, the bearing and conveying table, the guide mechanism 700, the feeding mechanism 300, the positioning mechanism 400 and the detection mechanism 500.

The rack 100 is formed by overlapping a plurality of sectional materials, and mainly plays a supporting role for supporting the first bearing and conveying table 200, the feeding mechanism 300, the positioning mechanism 400, the detection mechanism 500, the second bearing and conveying table 600 and the distributing mechanism. The housing 110 is installed on the rack 100 to form a dark room, so as to reduce the interference of an external light source. Other auxiliary devices, such as a door and an operation interface, are further installed on the housing 110, which is not described in detail herein.

The first bearing and conveying table 200 is mainly used for bearing and conveying the curved surface workpiece 800 to be detected to the feeding mechanism 300. The curved workpiece 800 may be sunroof glass or other curved glass. For those skilled in the art, the first bearing and conveying table 200 may be a belt, a roller, a chain plate, or other assembly line; however, the glass is preferably conveyed by a belt in consideration of fragile products and smooth transportation. In this embodiment, referring to fig. 3, the first bearing and conveying table 200 includes: the conveying mechanism comprises a conveying motor 210 arranged at one end of the rack 100, a speed reducer 220 connected with the conveying motor 210, a driving shaft 230 rotatably installed at one end of the rack 100 and in transmission connection with the speed reducer 220, a driven shaft 240 rotatably installed at the other end of the rack 100, a conveying belt 250 sleeved on the driving shaft 230 and the driven shaft 240, and a flexible supporting plate 260 installed on the rack 100 and positioned below the conveying belt 250. The cross-sectional shape of the flexible pallet 260 is a concave shape, the conveyor belt 250 is located in the groove of the flexible pallet 260, and the upper surface of the flexible pallet 260 is flush with the upper surface of the conveyor belt 250. So set up, the flexible layer board 260 can avoid waiting to detect curved surface work piece 800 and frame 100 direct contact, and the curved surface work piece 800 is detected to effectual protection, reduces the unnecessary damage in the data send process. Moreover, when the belt on one side sags, the traveling path of the curved workpiece 800 to be detected can be further deviated, so that the flexible supporting plate 260 can effectively prevent the curved workpiece 800 to be detected from sagging along with the movement of the belt and the traveling path of the curved workpiece 800 to be detected from deviating, and the correction efficiency of the follow-up guide mechanism 700 is improved.

The guiding mechanism 700 is arranged above the first bearing and conveying table 200 and is suitable for adjusting the curved surface workpiece 800 to be detected to the same posture; referring to fig. 4, the pilot mechanism 700 includes: the mounting frame 120, the lifting mechanism 710 and four pushing mechanisms; the mounting rack 120 is erected above the first bearing and conveying table 200; the lifting mechanisms 710 are arranged at two sides of the first bearing and conveying table 200 and lift the curved surface workpiece 800 to be detected to be separated from the first bearing and conveying table 200; the pushing mechanisms are respectively arranged in four directions of the mounting frame 120; the pushing mechanism comprises a secondary linear module 722 installed on the mounting frame 120, and a guide wheel arranged on the output end of the secondary linear module 722 and facing the first bearing and conveying table 200. When the curved surface workpiece 800 to be detected enters the lifting mechanism 710, the secondary linear module 722 drives the guide wheels to move towards the center of the mounting frame 120, and pushes the curved surface workpiece 800 to be detected to move towards one side of the mounting frame 120 until all the guide wheels are in contact with the outer edge of the curved surface workpiece 800 to be detected, so that the curved surface workpiece 800 to be detected keeps the same posture, and the guide of the curved surface workpiece 800 is realized.

Referring to fig. 5, the lifting mechanism 710 includes two same-frequency lifting units respectively located at two sides of the first bearing and conveying platform 200, in this embodiment, the lifting units include: the lifting mechanism comprises a truss fixedly installed on the rack 100, an installation plate 711 installed on the truss, a lifting motor 712 installed at the bottom of the installation plate 711, a lifting screw 713 connected with the lifting motor 712, lifting guide rails 714 arranged at two sides of the lifting screw 713, a lifting slider 715 sleeved on the lifting screw 713 and the sliding guide rails through ball bearings, a connection plate 716 installed on the lifting slider 715, and a plurality of flexible protrusions 717 fixedly installed at the top of the connection plate 716. The lifting screw 713 is driven by the lifting motor 712 to move, and then the lifting slider 715, the connecting plate 716 and the flexible protrusion 717 are driven to move upwards, so as to lift the curved surface workpiece 800 and move upwards to the pushing mechanism.

Referring to fig. 6, the pushing assembly may be divided into a first pushing mechanism 720 and a second pushing mechanism 730 according to the installation position of the pushing assembly. The first pushing mechanism 720 is installed on one side of the mounting frame 120 perpendicular to the conveying direction, and the first pushing mechanism 720 is located at the midpoint of the side of the mounting frame 120. Because car glass's length is great relatively, is provided with two sets of second pushing mechanism 730 in the parallel direction, second pushing mechanism 730 installs be on the mounting bracket 120 be on a parallel with one side of the direction of transmission band, just second pushing mechanism 730 all sets up the output at one-level straight line module 721, just one-level straight line module 721 install on the mounting bracket 120 side, and perpendicular with the direction of transfer of transmission band, consequently, the distance between two sets of second pushing mechanism 730 can be adjusted. When the curved surface workpieces 800 to be detected of different specifications are machined, the integral structure of the equipment does not need to be changed, and the user can only adjust the number and the positions of the pushing mechanisms according to requirements, so that the pilot machining of the curved surface workpieces 800 to be detected of different specifications can be met.

Referring to fig. 7, a connecting seat 723 is installed on an output end of the secondary linear module 722, and the connecting seat 723 is used for installing the guide wheel. The bottom of the connecting seat 723 is provided with a mounting groove, three mounting guide posts 724 are arranged in the mounting groove, a connecting block 725 is slidably mounted on the mounting guide posts 724, a mounting shaft 726 is vertically downward from the connecting block 725, and the guide wheel is mounted on the mounting shaft 726. Because an interaction force exists between the guide wheel and the curved surface workpiece 800 to be detected, in order to reduce the probability of damage or scratch of the curved surface workpiece 800 to be detected, a first buffer spring 422 is arranged on one side of the mounting guide pillar 724, which is far away from the mounting frame 120. One-level straight line module 721 and second grade straight line module 722 can be for multiple modes such as cylinder motion module, lead screw motion module, and in this embodiment, many one-level straight line module 721 and second grade motion module all select for use lead screw motion, for example, second grade straight line module 722 includes: the mounting structure comprises a mounting cover, a servo motor, a ball screw, sliding guide rails and connecting seats 723, wherein the mounting cover is mounted on one side of the mounting frame 120 or sleeved on the output end of the primary linear module 721, the servo motor is arranged on one side of the mounting cover, the ball screw is mounted in the mounting cover and connected with the servo motor, the sliding guide rails are arranged on two sides of the ball screw, and the connecting seats 723 are sleeved on the ball screw and the sliding guide rails.

The feeding mechanism 300 is located between the first bearing and conveying table 200 and the second bearing and conveying table 600. Referring to fig. 8, the feed mechanism 300 includes: a linear motion module 310 having one end located under the end of the first load-bearing platform 200 and the other end located at the beginning of the second load-bearing platform 600, and two sets of sliding platforms 320 located above the linear motion module 310. The distance between the two sets of sliding platforms 320 is exactly half of the stroke of the linear motion module 310. When one of the sliding platforms 320 is located below the first bearing and conveying platform for loading, the other sliding platform 320 is located just below the positioning mechanism 400, and the curved surface workpiece 800 is detected; similarly, when one of the sliding platforms 320 moves to the lower side of the positioning mechanism 400 to detect the curved workpiece 800, the other sliding platform 320 can just transfer the detected curved workpiece 800 onto the second bearing and transferring table 600, so as to realize automatic discharging. The reciprocating motion realizes the automatic feeding and discharging of the curved surface workpiece 800.

The linear motion module 310 may be a screw motion mechanism, a cylinder motion mechanism, a belt motion mechanism, and a rack and pinion motion mechanism. In this embodiment, the present invention employs a belt movement mechanism; referring to fig. 8, the linear motion module 310 includes: the device comprises a lower frame body 311 which is fixedly arranged on a machine frame 100 and has a section shape of 'U', a feeding motor 312 arranged at one end of the lower frame body 311, a gear box 313 connected with the feeding motor 312, a synchronizing wheel connected with the gear box 313 connected with the synchronizing wheel, a driven wheel arranged at the other end of the lower frame body 311, a feeding belt sleeved on the synchronizing wheel and the driven wheel, an upper cover body 314 which is arranged above the feeding belt, is fixedly connected with the lower frame body 311 at two ends and is arranged between two sides and the lower frame body 311 at a preset distance, two movable sub-seats 315 which are fixedly connected with the feeding belt at the bottom, are provided with middle parts penetrating through the upper cover body 314 and are connected with a sliding platform 320 at the top, and a plurality of belt pressing blocks arranged on the feeding belt. On one hand, the upper cover 314 can seal the lower frame 311 to function as a dust-proof lamp, and the rotor base 315 is slidably connected to the upper cover 314 to function as a slide rail. Of course, the belt clamping blocks are provided to increase the tension of the transfer belt 250 and improve the feeding accuracy, and in other embodiments, the belt clamping blocks may be omitted when the transfer belt tension is sufficiently large.

Referring to fig. 8, the sliding platform 320 includes: a first lifting mechanism 710 and a plurality of vacuum cups 325 coupled to an output end of the first lifting mechanism 710. In this embodiment, the first lifting mechanism 710 includes: the mounting base 321 is fixedly mounted on the rotor base 315, the lifting cylinder 322 is mounted inside the mounting base 321, an output shaft of the lifting cylinder 322 passes through the top of the mounting base 321 and is connected with the lifting plate 323, a plurality of limiting guide posts 324 are fixedly mounted at the bottom of the lifting plate 323, the limiting guide posts 324 pass through the top of the mounting base 321 through linear bearings, and a plurality of vacuum chucks 325 are mounted at the top of the lifting plate 323 and are used for adsorbing and fixing the curved surface workpiece 800.

Referring to fig. 9, the positioning mechanism 400 is located above the feeding mechanism 300, and the center of the positioning mechanism 400 is located at the midpoint of the linear motion module 310, and is adapted to adjust the curved surface workpiece 800 to be detected to the same position. The positioning mechanism 400: comprises a cross moving mechanism 410 arranged on the frame 100 and a clamping piece 420 arranged on the cross moving mechanism 410. The cross motion mechanism 410 is formed by stacking two sets of mutually perpendicular linear motion modules 310. Referring to fig. 10, the cross motion mechanism 410 includes: the servo motor comprises a fixing plate installed on the machine frame 100, a first servo motor 411 installed at one end of the fixing plate, a first screw 412 connected with an output shaft of the first servo motor 411, first sliding guide rails 413 arranged at two sides of the screw, a first sliding seat 414 sleeved on the first screw 412 through ball bearings and limited by the first sliding guide rails 413, a second servo motor 415 installed at one side of the first sliding seat 414, a second screw 416 connected with an output shaft of the second servo motor 415, second sliding guide rails 417 arranged at two sides of the screw, a second sliding seat 418 sleeved on the second screw 416 through ball bearings and limited by the second sliding guide rails 417, and a clamping member 420 installed on the second sliding seat 418. Wherein the first lead screw 412 and the second lead screw 416 are perpendicular to each other. The first sliding seat 414 is a rectangular second sliding seat 418, and makes a reciprocating linear motion along the first lead screw 412, and the second sliding seat 418 makes a reciprocating linear motion along the second lead screw 416, so as to form a coordinate system for adjusting the position of the clamping member 420. When different types of curved surface workpieces 800 are replaced, the position of the sensor is adjusted only through the cross motion mechanism 410 without changing other mechanical structures, and the effect is more remarkable when certain products which are updated more quickly are detected.

Wherein the clamping member 420 may be a vacuum chuck 325 and a claw. In this embodiment, the clamping member 420 is a claw. Referring to fig. 11, the locking claw is a "" -shaped positioning groove, and four positioning grooves form a rectangular frame. In the positioning process, the position of the positioning groove is adjusted in advance through the cross-shaped moving mechanism 410 according to the curved surface workpiece 800 to be detected, so that the position of the baffle 421 is slightly larger than the outer contour of the curved surface workpiece 800 to be detected, then the fit degree of the curved surface workpiece 800 to be detected and the clamping piece 420 is detected through a pressure sensor or a distance sensor, the placing of the curved surface workpiece 800 to be detected is ensured to meet the detection requirement, then the cross-shaped moving mechanism 410 is further adjusted until all the baffles 421 are in contact with the outer edge of the curved surface workpiece 800 to be detected, and the positioning process is completed.

In addition, because an interaction force exists between the baffle 421 and the curved workpiece 800 to be detected in the clamping process, the probability of damage or scratch of the curved workpiece 800 to be detected can be effectively reduced by installing the second buffer spring 727 between the second sliding seat 418 and the baffle 421 in the horizontal direction.

The detection assembly comprises a backlight source 510 and a CCD camera 520 which are respectively positioned above, at the left side and at the right side of the positioning mechanism 400; and the backlight source 510 and the CCD camera 520 are installed to satisfy the reflection law of light. Sine stripes are emitted out of the screen of the backlight source 510 and projected onto the curved surface workpiece 800, after being reflected by the curved surface workpiece 800, an image is distorted, and the CCD camera 520 collects a distorted image, wherein the distorted image reflects the surface type information of the curved surface workpiece 800, and the surface type data of the curved surface workpiece 800 is resolved. The specific three-dimensional surface type restoration method comprises the following steps: projecting phase-shifted cosine distribution stripes and correspondingly recording images of the tested specular reflection stripes; then, phase is removed by using a phase-shifting method, phase unwrapping is carried out, and phase distribution is converted into position coordinate distribution; and converting the position coordinates into inclination angle distribution, and synthesizing the inclination angle distribution into three-dimensional surface distribution.

Similarly, the second bearing and conveying table 600 is mainly used for bearing and conveying the curved surface workpiece 800 to be detected from the feeding mechanism 300 to the next station, and the specific structure thereof is the same as that of the first bearing and conveying table 200, and is not described in detail here.

For the convenience of understanding the technical scheme of the curved surface defect detection device, the working principle of the device is briefly explained: the conveying motor 210 of the first bearing and conveying table 200 is opened, so as to drive the driving belt to rotate along the driving shaft 230 and the driven shaft 240, and the curved workpiece 800 is conveyed to the upper side of the guiding mechanism 700 through the flexible supporting plate 260 and the driving belt. Then, the lifting screw 713 is driven to move through the lifting motor 712, and then the lifting slider 715, the connecting plate 716 and the flexible protrusion 717 are driven to move upwards, so as to lift the curved surface workpiece 800 to be detected, and move upwards to the pushing mechanism, when the lifting mechanism 710 is lifted to be horizontal to the guide wheel, the second-stage linear module 722 drives the guide wheel to move towards the central position of the mounting frame 120, when the guide wheel on one side contacts the outer edge of the curved surface workpiece 800 to be detected, the guide wheel on one side can continue to move towards the central position of the mounting frame 120, and the curved surface workpiece 800 to be detected is pushed to continue to move towards the other side of the mounting frame 120, until all the guide wheels are contacted with the outer edge of the curved surface workpiece 800 to be detected, the pushing mechanism stops moving, so that the curved surface workpiece 800 to be detected. Then, the vacuum chuck 325 is lifted to the back of the curved surface workpiece 800 to abut against through the lifting cylinder 322 of the sliding platform 320, and the curved surface workpiece 800 is fixed; and then the linear motion module 310 is driven to move by the feeding motor 312, so as to drive the sliding platform 320 and the curved surface workpiece 800 to move to the positioning mechanism 400. Then, the position of the second sliding seat 418 is adjusted in advance through the cross-shaped moving mechanism 410, so that the position of the baffle 421 is slightly larger than the outer contour of the curved surface workpiece 800 to be detected, then the fitting degree of the curved surface workpiece 800 to be detected and the clamping member 420 is determined through a pressure sensor or a distance sensor, so that the placement of the curved surface workpiece 800 to be detected meets the detection requirement, the cross-shaped moving mechanism 410 is further adjusted until all the baffle 421 are in contact with the outer edge of the curved surface workpiece 800 to be detected, and the positioning process is completed. Then, sine stripes are emitted out of the screen of the backlight source 510 and projected onto the curved surface workpiece 800, after being reflected by the curved surface workpiece 800, an image is distorted, the CCD camera 520 collects a distorted image, wherein the distorted image reflects the surface type information of the curved surface workpiece 800, and the surface type data of the curved surface workpiece 800 is resolved to determine whether the surface of the curved surface workpiece 800 has defects; in the detection process, the feeding motor 312 rotates reversely to drive the linear motion module 310 to move, so as to drive the sliding platform 320 and the curved surface workpiece 800 to return to the first bearing and conveying table 200, and meanwhile, the other sliding platform 320 just returns to the positioning mechanism 400; then, the curved workpiece 800 is adsorbed and fixed by the other sliding platform 320, and the feeding motor 312 drives the linear motion module 310 to move, so as to drive the other sliding platform 320 and the curved workpiece 800 to move above the second bearing and conveying table 600.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.