Automatic correction device and correction method for soft porcelain backing screen

Abstract

The present invention relates to the field of soft porcelain production technology, and specifically to an automatic correction device and correction method for a soft porcelain back mesh. The automatic correction device and correction method for a soft porcelain back mesh utilize a positioning conveying mechanism to position the conveyed soft porcelain, which is beneficial for correcting the back mesh in the later stage and ensuring the accuracy of the correction. An adjustment component is designed, and the adjustment component can drive a roller to rotate in a direction perpendicular to the plane where the positioning conveying mechanism is located. The contact between the roller and the back mesh is utilized to enable the roller to drive the back mesh to twist relative to the soft porcelain, thereby correcting the back mesh and ensuring that the back mesh is completely and correctly attached to the back of the soft porcelain. A visual system is used to identify the degree of misalignment between the back mesh and the soft porcelain, and then a control system controls the conveying speed of the positioning conveying mechanism and the rotation angle of the adjustment component according to the feedback signal of the visual system, driving the back mesh to twist to correct its relative position with the soft porcelain. The entire adjustment process realizes automatic identification and adjustment, and has high work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of soft porcelain production, and in particular to an automatic correction device and correction method for a soft porcelain backing screen. Background Art

[0002] During the production of soft porcelain, in order to make the soft porcelain have good toughness and facilitate adhesion to the main body of the building, a back mesh is generally adhered to the back of the soft porcelain. At present, the back mesh pasting process generally relies on manual pasting. Although the pasting quality is high, the back mesh and the back of the soft porcelain are completely matched without burrs, the work efficiency is low. In response to this situation, the industry has developed some automatic back mesh pasting equipment. The working process of these equipment is generally to convey the soft porcelain one by one through a dedicated conveying equipment after the shaping and cutting is completed, and at the same time cooperate with the back mesh conveying mechanism to perform preliminary adhesion of the back mesh to the back of the soft porcelain. Among them, the back mesh conveying mechanism can adhere the side of the back mesh to the soft porcelain with glue, and then cut it into a shape that matches the appearance of the soft porcelain. Although these automatic back mesh pasting devices can greatly improve the efficiency of back mesh pasting, due to the errors in equipment transportation and the fact that the back mesh and soft porcelain are transported separately, the pasting quality of the two is reduced. The back mesh and soft porcelain are easily pasted misaligned, causing some edges of the back mesh to protrude from the edge of the soft porcelain to form burrs. In addition, some areas of the soft porcelain have reduced adhesion and toughness in the later stage because there is no back mesh pasted on them, which directly affects the quality of the soft porcelain. Summary of the Invention

[0003] In order to overcome one of the shortcomings of the prior art, the purpose of the present invention is to provide an automatic correction device and correction method for a soft porcelain back mesh. The automatic correction device and correction method for a soft porcelain back mesh can automatically identify the misalignment of the back mesh and the soft porcelain, and adjust the relative position of the back mesh relative to the soft porcelain by adjusting the direction of the roller to achieve automatic correction.

[0004] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] A device for automatically correcting a back net for a soft porcelain paste, comprising a frame, a positioning and conveying mechanism, a roller pressure adjustment mechanism, a visual system and a control system; the positioning and conveying mechanism is mounted on the frame and can position the soft porcelain conveyed thereon; the roller pressure adjustment mechanism is provided with an adjustment component, the adjustment component is arranged on the frame above the positioning and conveying mechanism, a roller is rotatably mounted on the adjustment component, the roller can cooperate with the positioning and conveying mechanism to press the back net onto the back of the soft porcelain; the output end of the adjustment component can rotate in a direction perpendicular to the plane where the positioning and conveying mechanism is located; the visual system is mounted on the frame directly above the positioning and conveying mechanism; the control system is electrically connected to the visual system, the roller pressure adjustment mechanism and the positioning and conveying mechanism, the control system can control the conveying speed of the positioning and conveying mechanism and the rotation angle of the adjustment component according to the feedback signal of the visual system, thereby driving the back net to twist to correct its relative position with the soft porcelain.

[0006] Furthermore, two parallel shock-absorbing and centering components are provided on the adjustment end of the adjustment component, and the two ends of the roller can be rotatably installed on the two shock-absorbing and centering components respectively. When the driving end of the adjustment component rotates, each of the shock-absorbing and centering components can automatically adjust the height of the rotation center of the corresponding end of the roller according to the force exerted on the roller when it contacts the back net, so as to adapt to the steering of the roller.

[0007] Furthermore, the shock-absorbing and centering assembly includes a mounting block, on which two parallel mounting plates are provided, and the two mounting plates are respectively provided with an open groove and a sliding groove downwardly, and the mounting plate with the open groove is provided on one side close to the middle of the adjustment assembly, and the open end of the open groove is provided in a trumpet shape, and both ends of the roller are provided with a frustum with the tip facing outward, and the outer wall of each frustum abuts against the inner wall of the open groove at the corresponding end, and the ends of the two frustums are rotatably installed with a fixed block, and each fixed block is hinged with a slider, and the two sliders are respectively installed in the sliding groove at the corresponding end, and a reset member is provided in each sliding groove, and the two ends of the reset member are respectively connected to the bottom of the corresponding end of the slide groove and the slider.

[0008] Furthermore, two groups of reset members are provided in each sliding groove, one end of each reset member is respectively provided on both sides of the slider, and the other end of each reset member is connected to the bottom of the corresponding end of the sliding groove.

[0009] Furthermore, the end of the frustum is provided with a mounting shaft, and the mounting shaft is installed on the fixed block through a bearing, and a rotating sleeve is provided between the inner ring of the bearing and the outer wall of the mounting shaft. The rotating sleeve rotates coaxially with the inner ring of the bearing, and the rotating sleeve can slide along the axial direction of the mounting shaft. The inner ring of the rotating sleeve is provided with a keyway along the axial direction, and the outer wall of the mounting shaft is provided with a convex key that cooperates with the keyway.

[0010] Furthermore, the adjustment assembly includes a sliding seat, a servo motor and a U-shaped frame. The sliding seat can be slidably installed on the frame along the conveying direction of the positioning and conveying mechanism. The frame is provided with a sliding electric cylinder that drives the sliding seat to slide; the servo motor is installed on the sliding seat, and the middle part of the back side of the U-shaped frame is connected to the rotating end of the servo motor. The servo motor can drive the U-shaped frame to rotate. The servo motor and the sliding electric cylinder are both electrically connected to the control system, and both ends of the roller are connected to the two ends of the U-shaped frame through the shock-absorbing and centering assembly.

[0011] Furthermore, a buffer and shock-absorbing component is provided between the rotating end of the servo motor and the U-shaped frame.

[0012] Furthermore, the buffer shock-absorbing assembly includes an upper flange and a lower flange, the upper flange is connected to the rotating end of the servo motor, the lower flange is connected to the back of the U-shaped frame, the upper flange is movably mounted on the lower flange, and a shock-absorbing spring is mounted on the outside of the upper flange, and the two ends of the shock-absorbing spring are respectively connected to the end of the upper flange and the lower flange.

[0013] Furthermore, the positioning and conveying mechanism includes a conveyor belt, a conveying motor and a guide frame, the conveyor belt can be rotatably mounted on the frame, the conveying motor is mounted on one side of the frame and the output end is connected to the drive shaft of the conveyor belt, and the conveying motor is electrically connected to the control system; the conveyor belt is provided with a positioning area on the feeding end and an adjustment area on the discharging end; the guide frames are provided in a pair and are respectively arranged on both sides of the positioning area, the two guide frames are arranged in a trumpet shape at the feeding end, and a number of guide wheels are provided on the inner sides of the two guide frames, and limit plates are provided on both sides of the adjustment area, and the visual system is installed on the frame above the adjustment area.

[0014] A method for automatically correcting a soft porcelain backing screen comprises the following steps:

[0015] Step S100: The calibration device is started, the conveying motor rotates and drives the conveyor belt to operate normally. The conveyor belt receives the soft porcelain with the backing net piece by piece. After the soft porcelain passes through the positioning area of ​​the positioning conveying mechanism to position itself in the conveying posture and begins to enter the adjustment area, the vision system starts to work and the conveying speed of the conveyor belt is adaptively reduced.

[0016] Step S200: The vision system captures and identifies the soft porcelain and the backing mesh placed in the adjustment area, and transmits the captured image data to the control system. The control system then identifies the soft porcelain and the backing mesh from the image data, and constructs separate contours of the soft porcelain and the backing mesh, respectively. The contour of the soft porcelain is used as a reference to compare the contour of the soft porcelain with the contour of the backing mesh to determine the degree and extent of misalignment.

[0017] Step S300: the control system controls the steering direction of the servo motor and the extension and contraction amount of the sliding electric cylinder according to the mutual misalignment degree and misalignment situation between the soft porcelain and the back net, so that the roller can drive the back net to twist relative to the soft porcelain until the back net is located at one end of the feed and is aligned with the end corresponding to the soft porcelain; after the back net is located at one end of the feed and is compacted and bonded with the end corresponding to the soft porcelain, the control system identifies the mutual misalignment situation of the unrolled area according to the latest image data taken by the visual system and controls the steering direction of the servo motor; if the unrolled part of the back net is not misaligned with the soft porcelain, the servo motor does not rotate, and the axial direction of the roller is perpendicular to the conveying direction of the conveyor belt; if the unrolled part of the back net is misaligned with the soft porcelain, the area of ​​the unrolled part of the back net that exceeds the outline of the soft porcelain is twisted twice along the conveying direction of the conveyor belt based on the outline of the soft porcelain; the above-mentioned rolling adjustment operation is repeated until the control system identifies that there is no mutual misalignment in the unrolled area according to the latest image data taken by the visual system;

[0018] Step S400: After the roller completely rolls the back screen onto the back of the soft porcelain, the conveyor belt outputs the soft porcelain to the adjustment area, and the servo motor drives the roller to reset, waiting for the next piece of soft porcelain to enter the adjustment area, and repeating the operations of steps S200-300.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides an automatic correction device and correction method for a soft porcelain back mesh. The device and correction method utilize a positioning conveying mechanism to position the conveyed soft porcelain, which is beneficial for correcting the back mesh later and ensuring the accuracy of the correction. An adjustment component is designed, and the output end of the adjustment component can drive a roller to rotate in a direction perpendicular to the plane where the positioning conveying mechanism is located. Such a design can utilize the contact between the roller and the back mesh so that the roller can drive the back mesh to twist relative to the soft porcelain, thereby correcting the back mesh and ensuring that the back mesh is completely and correctly attached to the back of the soft porcelain. A visual system is used to identify the degree of misalignment between the back mesh and the soft porcelain, and then a control system controls the conveying speed of the positioning conveying mechanism and the rotation angle of the adjustment component according to the feedback signal of the visual system, driving the back mesh to twist to correct its relative position with the soft porcelain. The entire adjustment process realizes automatic recognition and adjustment, with a high degree of automation and high work efficiency.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0023] Figure 2 2 is a schematic structural diagram of a roller pressure adjustment mechanism according to an embodiment of the present invention;

[0024] Figure 3 This is a partial structural diagram of the roller pressure adjustment mechanism in the embodiment of the present invention. Figure 1 ;

[0025] Figure 4 This is a partial structural diagram of the roller pressure adjustment mechanism in the embodiment of the present invention. Figure 2 ;

[0026] Figure 5 is a partial cross-sectional view of a roller pressure adjustment mechanism according to an embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of a shock-absorbing and centering assembly according to another embodiment of the present invention;

[0028] Figure 7 is a control principle diagram of an embodiment of the present invention;

[0029] Figure 8 This is a schematic flow chart of the control and adjustment of the back screen relative to the soft porcelain in an embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] Frame 100, positioning and conveying mechanism 200, conveyor belt 210, positioning area 211, adjustment area 212, conveying motor 220, guide frame 230, guide wheel 240, limit plate 250, rolling adjustment mechanism 300, adjustment assembly 310, sliding seat 311, servo motor 312, U-shaped frame 313, sliding electric cylinder 314, roller 320, cone 321, fixed block 322, slider 323, mounting shaft 324, bearing 325, rotating sleeve 326, keyway 327, cam 328, shock-absorbing and centering assembly 330, mounting block 331, mounting plate 332, opening groove 333, sliding groove 334, reset part 335, buffer and shock-absorbing assembly 340, upper flange 341, lower flange 342, shock-absorbing spring 343, vision system 400, control system 500. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] See also Figures 1 to 8 The present application provides an automatic correction device for a soft porcelain back mesh, comprising a frame 100, a positioning and conveying mechanism 200, a roller pressure adjustment mechanism 300, a visual system 400 and a control system 500; the positioning and conveying mechanism 200 is mounted on the frame 100 and is capable of positioning the soft porcelain conveyed thereon; the roller pressure adjustment mechanism 300 is provided with an adjustment component 310, the adjustment component 310 is arranged on the frame 100 above the positioning and conveying mechanism 200, and a roller 320 is rotatably mounted on the adjustment component 310, and the roller 320 can cooperate with the positioning and conveying mechanism 200 to compact the back mesh onto the soft porcelain. on the back side; the output end of the adjustment component 310 can rotate in a direction perpendicular to the plane where the positioning and conveying mechanism 200 is located; the visual system 400, which is installed on the frame 100 and is located directly above the positioning and conveying mechanism 200; the control system 500, which is electrically connected to the visual system 400, the roller adjustment mechanism 300, and the positioning and conveying mechanism 200, and the control system 500 can control the conveying speed of the positioning and conveying mechanism 200 and the rotation angle of the adjustment component 310 according to the feedback signal of the visual system 400, thereby driving the back net to twist to correct its relative position with the soft porcelain.

[0034] The frame 100 is also provided with a soft porcelain conveying mechanism and a back net clamping mechanism. The back net clamping mechanism is installed on the frame 100 above the feed end of the soft porcelain conveying mechanism. The soft porcelain conveying mechanism conveys the difficult-to-process soft porcelain straightly to the feed end of the positioning conveying mechanism 200, while the back net clamping mechanism outputs the back net. When the soft porcelain enters the positioning conveying mechanism 200, the back net has already covered the back of the soft porcelain. In actual operation, the back net clamping mechanism continuously outputs the rolled back net, which, after passing through the gluing device, is cut by a cutter to form a single back net of the same length as the soft porcelain. When the soft porcelain passes under the gluing device, the end of the back net extending from the gluing device falls off and adheres to the soft porcelain. At this time, the adhesion between the two is not strong, and the back net is only partially adhered to the back of the soft porcelain. It should be noted that, in the present application, in order to reduce the difficulty of subsequent adjustments, the output direction of the back net is the same as the output direction of the soft porcelain, and the widths of the two are the same, which is conducive to controlling the back net rolls cut into rolls. In fact, the soft porcelain conveying mechanism and the back net clamping mechanism are both prior art and will not be described in detail in this application. It should be noted that when the back net and the soft porcelain are initially attached and enter the positioning conveying mechanism 200, the degree of overlap between the soft porcelain and the back net is at least more than 95%, and some are even completely attached. If the contours of the back net and the soft porcelain are misaligned, under normal circumstances, the maximum distance of the portion where the back net edge extends beyond the soft porcelain edge is generally 2-4 mm. Therefore, in the actual adjustment process, the adjustment torsion angle of the back net relative to the soft porcelain is very small. Therefore, this situation is also the adjustment basis of the present application.

[0035] In addition, in the above situation, the positioning and conveying mechanism 200 can be a conventional conveyor belt structure, the visual system 400 and the control system 500 are also conventional electronic components, and the cooperation between the two is also a relatively common control principle. In this application, the visual system 400 is a common CCD system, and the control system 500 is a common programmable control system. For the specific cooperation between the two, please refer to CN103645743B-Visual alignment control system and method, CN106530357B-Visual alignment control device and calibration method, CN115200480A-A kind of alignment and bonding visual inspection system and other patents. This application does not elaborate on the specific principles of the mutual cooperation between the two to perform alignment detection on the product.

[0036] See also Figures 1 to 2In order to convey the soft porcelain and position it at the same time, in one embodiment of the present application, the positioning and conveying mechanism 200 includes a conveyor belt 210, a conveying motor 220 and a guide frame 230. The conveyor belt 210 is rotatably mounted on the frame 100. The conveying motor 220 is mounted on one side of the frame 100 and its output end is connected to the drive shaft of the conveyor belt 210. The conveying motor 220 is electrically connected to the control system 500. The conveyor belt 210 is provided with a positioning area 211 at the feeding end and an adjustment area 212 at the discharging end. The guide frames 230 are provided in a pair and are respectively arranged on both sides of the positioning area 211. The two guide frames 230 are arranged in a trumpet shape at the feeding end. A plurality of guide wheels 240 are provided on the inner sides of the two guide frames 230. Limit plates 250 are provided on both sides of the adjustment area 212. The vision system 400 is mounted on the frame 100 above the adjustment area 212.

[0037] Among them, the conveyor belt 210 is relatively long in this application, and its length is at least four times the length of the soft porcelain, so that the adjustment area 212 has sufficient operating space and duration when cooperating with the visual system 400 and the adjustment component 310. In addition, in order to prevent the adjustment component 310 from affecting the normal shooting of the visual system 400, in this application, the visual system 400 is installed in front of the adjustment component 310, and the front is relative to the conveying direction of the conveyor belt 210. Multiple cameras can be set in the visual system 400, and multiple cameras are used to jointly shoot the soft porcelain, and then the image of the soft porcelain is synthesized, so that the influence of the adjustment component 310 can be eliminated. This technology can refer to the technology in CN106530357B-Visual alignment control device and calibration method, and this application will not describe it in detail.

[0038] In the above embodiment, under normal circumstances, the soft porcelain is basically in the correct position after entering the conveyor belt 210. However, due to the vibration of the conveyor belt 210 itself, the soft porcelain may deviate during the conveying process. Therefore, it is necessary to rely on the multiple guide wheels 240 on the inner side of the guide frame 230 in the positioning area 211 to gradually align the soft porcelain to ensure that it can enter the adjustment area 212 in the correct posture, thereby ensuring that the vision system 400 can correctly capture and subsequently adjust the roller 320.

[0039] In practice, in this application, before the conveyor belt 210 carrying the soft porcelain enters the working area of ​​the adjustment assembly 310, the vision system 400 has already completed video recording and capturing image data of the backing web and the soft porcelain. The control system 500 then controls the adjustment assembly 310 to rotate the appropriate angle based on the misalignment between the two, thereby causing the backing web to twist relative to the soft porcelain to correct their relative position. Because the backing web and the soft porcelain are not firmly bonded before rolling, and only partially adhere, the adjustment assembly 310, via the roller 320, can partially twist the backing web and the soft porcelain. After rolling by the roller 320, the adhesion between the two significantly increases. If the roller 320 twists and rolls the unrolled area, the unrolled portion of the backing web will be more likely to twist relative to the soft porcelain, while the rolled portion will not experience significant distortion. This characteristic is utilized in this application to ensure that during multiple twist adjustments by the roller 320, the rolled backing web will not experience excessive slippage or twisting with the soft porcelain, potentially affecting the quality of the rolling process. In the process of twisting and rolling a backing mesh and the corresponding soft porcelain, it usually starts from the end of the two along the conveying direction. Since the backing mesh has a certain deflection and there is a certain adhesion area between it and the back of the soft porcelain, the entire backing mesh needs to be twisted and rolled multiple times during the rolling process of the soft porcelain to ensure that the two can be corrected and fitted to the greatest extent. The specific number of corrections required depends on the flexibility of the backing mesh and the viscosity of the glue, which is not described in detail in this application. Normally, after the roller 320 is corrected once, the unrolled area of ​​the backing mesh close to the feed direction of the roller 320 will be driven for correction, so the roller 320 will directly roll this area until the unrolled area in the feed direction of the roller 320 is misaligned, and then the roller 320 is twisted a second time. Repeating the above action multiple times can complete the rolling. During the above rolling correction process, the visual system 400 needs to capture the image of the unrolled area of ​​the backing mesh and the soft porcelain in real time, and then update it in real time to ensure the normal correction of the roller 320.

[0040] See also Figures 3 to 5In one embodiment of the present application, as the adjustment assembly 310 drives the roller 320 to rotate, the roller 320 needs to compact the backing net against the back of the soft porcelain. Therefore, the roller 320 exerts a certain pressure on the backing net. If the roller 320 is directly twisted, the length of the roller 320 is greater than the width of the backing net. This will cause the entire backing net to be excessively twisted in the area where the roller 320 contacts the backing net, making it difficult to twist the backing net. To this end, in one embodiment of the present application, two parallel damping and centering assemblies 330 are provided on the adjustment end of the adjustment assembly 310. The two ends of the roller 320 are rotatably mounted on the two damping and centering assemblies 330. When the driving end of the adjustment assembly 310 rotates, each of the damping and centering assemblies 330 can automatically adjust the height of the rotation center of the corresponding end of the roller 320 according to the force exerted on the roller 320 when in contact with the backing net, so as to adapt to the direction of the roller 320. The main function of the shock-absorbing and centering component 330 is to adapt to the back net and absorb excessive force on the back net during torsion; at the same time, the shock-absorbing and centering component 330 is used to adjust the height of the rotation center of one end of the roller 320, which is conducive to the roller 320 being able to adapt to the adhesion of different areas on the back net.

[0041] See also Figures 3 to 5 In order to facilitate rotation, in one embodiment of the present application, the adjustment assembly 310 includes a sliding seat 311, a servo motor 312 and a U-shaped frame 313. The sliding seat 311 can be slidably installed on the frame 100 along the conveying direction of the positioning and conveying mechanism 200, and the frame 100 is provided with a sliding electric cylinder 314 that drives the sliding seat 311 to slide; the servo motor 312 is installed on the sliding seat 311, and the middle part of the back side of the U-shaped frame 313 is connected to the rotating end of the servo motor 312. The servo motor 312 can drive the U-shaped frame 313 to rotate, and the servo motor 312 and the sliding electric cylinder 314 are both electrically connected to the control system 500. Both ends of the roller 320 are connected to the two ends of the U-shaped frame 313 through the shock-absorbing and centering assembly 330. The main function of the sliding seat 311 and the sliding electric cylinder 314 is to ensure that the end of the back mesh can be adjusted to be flush with the end of the soft porcelain along the feeding direction. This adjustment can be achieved by adapting the extension of the sliding electric cylinder 314 to the difference in the conveying capacity of the conveyor belt 210. For example, if the end of the back mesh extends beyond the end of the soft porcelain, the sliding electric cylinder 314 will retract along the feeding direction while the conveyor belt 210 is operating normally. The force generated by the roller 320 when it is not in contact with the soft porcelain causes the back mesh to retreat relative to the soft porcelain in the feeding direction, thereby achieving alignment of the end of the back mesh in the feeding direction with the corresponding end of the soft porcelain. The entire operation process still relies on the visual system 400 and control system 500 for adjustment and control.

[0042] Furthermore, during the actual rolling process, the sliding cylinder 314 can still be used to adjust the fit between the backing screen and the soft porcelain and to stretch the backing screen. During operation, the sliding cylinder 314 can also reciprocate to drive the roller 320 to roll back and forth on areas of the backing screen that have already been compacted, allowing for fine-tuning of the compacted areas to a certain extent.

[0043] See also Figure 5 and Figure 6 In the process of the servo motor 312 driving the U-shaped frame 313 to drive the roller 320 to rotate, since the roller 320 is not perpendicular to the conveying direction of the conveyor belt 210, the soft porcelain will generate an axial force on the roller 320. In order to offset this part of the force, it is necessary to design a shock-absorbing and centering component 330 to solve this problem. The present application provides a specific embodiment of the shock-absorbing and centering component 330, the shock-absorbing and centering component 330 includes a mounting block 331, and two parallel mounting plates 332 are provided on the mounting block 331. The two mounting plates 332 are respectively provided with an opening groove 333 and a sliding groove 334 downwardly. The mounting plate 332 with the opening groove 333 is provided on one side close to the middle of the adjustment component 310. The open end of the opening groove 333 is provided in a trumpet shape. Both ends of the roller 320 Each of the two cones 321 is provided with a pointed end facing outward, and the outer wall of each cone 321 abuts against the inner wall of the opening groove 333 at the corresponding end. The ends of the two cones 321 are rotatably mounted with a fixed block 322, and each of the fixed blocks 322 is hinged with a slider 323. The two sliders 323 are respectively mounted in the sliding groove 334 at the corresponding end, and a reset member 335 is provided in each sliding groove 334. The two ends of the reset member 335 are respectively connected to the bottom of the corresponding end of the sliding groove and the slider 323.

[0044] In the above embodiment, the slider 323 and the fixed block 322 are actually connected by a rotating shaft, which can adapt to the vertical deviation of the axis of the roller 320, that is, the height difference between the two ends of the roller 320. When the soft porcelain exerts an axial force on the roller 320, it will cause a certain displacement of one end of the roller 320 along the direction of the axial force, and then cooperate with the action of the open groove 333 to cause the axis of the roller 320 at this end to move downward. At this time, the force exerted by this end on the back mesh is increased, which is conducive to pulling the unrolled area of ​​the back mesh, so that the dislocation of the back mesh in the unrolled area is gradually corrected. For detailed force analysis and adjustment, please see Figure 8 .exist Figure 8 In the middle, the solid-line frame represents soft porcelain, and the dashed-line frame represents the back mesh;

[0045] When the axis of the roller 320 is not perpendicular to the direction of conveying the soft porcelain, the force direction of the roller 320 is as follows: Figure 8b. At this point, the roller 320 is forced to move toward end C. This is due to the interaction between the outer wall of the cone 321 and the inner wall of the corresponding slot 333, which lifts it upward, thereby achieving centering. Because the axial end of the cone 321 is closer to the opening of the slot 333, the axial end of the cone 321 moves downward. End C of the roller 320 now presses down on the back web, while the force exerted by end D on the back web decreases, allowing the back web to finely swing clockwise around end C of the roller 320, thereby aligning it relative to the soft porcelain. It should be noted that after the twisting is completed, the servo motor 312 drives the U-shaped frame 313 to reset the roller 320. At this point, the reset member 335 cooperates with the opening of the trumpet-shaped slot 333 to automatically return the cones 321 at both ends of the roller 320 to their original position. This ensures consistent height of the axis of the roller 320, facilitating rolling of the back web.

[0046] In the above embodiment, to increase the restoring force, two sets of return members 335 are provided in each sliding groove 334. One end of each return member 335 is provided on both sides of the slider 323, and the other end of each return member 335 is connected to the bottom of the corresponding end of the sliding groove 334. The return member 335 can be a spring or a spring.

[0047] See also Figure 6 In one embodiment of the present application, to facilitate installation and provide sufficient space for movement, a mounting shaft 324 is provided at the end of the cone 321. The mounting shaft 324 is mounted on the fixed block 322 via a bearing 325. A rotating sleeve 326 is provided between the inner ring of the bearing 325 and the outer wall of the mounting shaft 324. The rotating sleeve 326 rotates coaxially with the inner ring of the bearing 325 and can slide along the axis of the mounting shaft 324. The inner ring of the rotating sleeve 326 is provided with a keyway 327 along the axis, and the outer wall of the mounting shaft 324 is provided with a key 328 that cooperates with the keyway 327. With the above design, when the axis of the entire roller 320 is not perpendicular to the conveying direction of the conveyor belt 210, the rotating sleeve 326 and the mounting shaft 324 will undergo relative displacement while maintaining coaxial rotation.

[0048] See also Figures 2 to 5In the present application, in order to absorb the vibration impact of the roller 320 during the rolling process, a buffer shock-absorbing assembly 340 is further provided between the rotating end of the servo motor 312 and the U-shaped frame 313. The buffer shock-absorbing assembly 340 can be a conventional shock-absorbing structure, such as a spring shock-absorbing structure, a spring slider structure, etc. In an improved embodiment of the present application, the buffer shock-absorbing assembly 340 includes an upper flange 341 and a lower flange 342. The upper flange 341 is connected to the rotating end of the servo motor 312, and the lower flange 342 is connected to the back of the U-shaped frame 313. The upper flange 341 is movably mounted on the lower flange 342. A shock-absorbing spring 343 is mounted on the outer surface of the upper flange 341, and the two ends of the shock-absorbing spring 343 are respectively connected to the ends of the upper flange 341 and the lower flange 342.

[0049] See also Figure 8 The present invention also provides a method for automatically correcting a soft porcelain backing screen, comprising the following steps:

[0050] Step S100: The calibration device is activated, the conveying motor 220 rotates and drives the conveyor belt 210 to operate normally. The conveyor belt 210 receives the soft porcelain with the backing net piece by piece. After the soft porcelain passes through the positioning area 211 of the positioning conveying mechanism 200 to determine its conveying posture and begins to enter the adjustment area 212, the vision system 400 starts to work and the conveying speed of the conveyor belt 210 is adaptively reduced.

[0051] Step S200: The vision system 400 captures and identifies the soft porcelain and the backing mesh placed thereon in the adjustment area 212, and transmits the captured image data to the control system 500. The control system 500 identifies the soft porcelain and the backing mesh from the image data, and then constructs separate contours of the soft porcelain and the backing mesh, respectively. The contour of the soft porcelain is used as a reference to compare the contour of the soft porcelain with the contour of the backing mesh to determine the degree of misalignment and the degree of misalignment.

[0052] Step S300: The control system 500 controls the direction of the servo motor 312 and the extension and contraction of the sliding cylinder 314 according to the degree and situation of the mutual misalignment between the soft porcelain and the back net, so that the roller 320 can drive the back net to twist relative to the soft porcelain until the back net is located at one end of the feed and is aligned with the end corresponding to the soft porcelain; after the back net is located at one end of the feed and is compacted and bonded with the end corresponding to the soft porcelain, the control system 500 identifies the mutual misalignment of the unrolled area according to the latest image data captured by the visual system 400 and controls the rotation of the servo motor 312. direction; if the unrolled portion of the back mesh is not misaligned with the soft porcelain, the servo motor 312 does not rotate, and the axis direction of the roller 320 is perpendicular to the conveying direction of the conveyor belt 210; if the unrolled portion of the back mesh is misaligned with the soft porcelain, the area of ​​the unrolled portion of the back mesh that exceeds the soft porcelain outline is twisted twice along the conveying direction of the conveyor belt 210 based on the outline of the soft porcelain; the above-mentioned rolling adjustment operation is repeated until the control system 500 recognizes that there is no mutual misalignment in the unrolled areas based on the latest image data captured by the visual system 400;

[0053] Step S400: After the roller 320 completely rolls the back web onto the back of the soft porcelain, the conveyor belt 210 outputs the soft porcelain to the adjustment area 212, and the servo motor 312 drives the roller 320 to reset, waiting for the next piece of soft porcelain to enter the adjustment area 212, and repeating the operations of steps S200-300.

[0054] In step S200, the product's outline is synthesized using visual images from multiple directions. This is a common technique and will not be described in detail in this application. It should be noted that, in this application, because the backing mesh is in a grid-like shape, in the actual adjustment process, the edges of the backing mesh will inevitably have crisscrossing glue thread ends due to inaccurate cutting. Therefore, during the recognition process, the visual system 400 uses the shape formed by the vertical and horizontal glue lines on the outermost circle of the backing mesh as the basis for determining the backing mesh's posture and position. Therefore, during the actual judgment process, the control system 500 first determines whether the shape of the structure formed by the vertical and horizontal glue lines on the outermost circle of the backing mesh is aligned with the outline of the soft porcelain, that is, whether the corresponding edges are parallel. Only then does it determine whether the area enclosed by all the glue thread ends is aligned with the outline of the soft porcelain. Of course, in some embodiments, it is possible to directly use pattern capture to capture and identify the glue thread ends, and then use an algorithm to identify and construct the outline formed by all the glue thread ends. In this way, the specific outline of the backing mesh is constructed. This method has high algorithm requirements, but the overall accuracy is higher. This design solution is preferred in this application.

[0055] In step S300, as the roller 320 and the back of the soft porcelain are rolling together, the sliding cylinder 314 also drives the sliding seat 311 to slide back and forth. This reciprocating rolling action enhances the adhesion quality of the backing net to the back of the soft porcelain. Each rolling action allows for micro-adjustments, thereby preventing excessive distortion of the backing net due to excessive twisting. This action simulates the process of repeated manual rolling and adjustment. It should be noted that the backing net used in this application is made of polyester fiber that has been glued and dried. Therefore, in actual use, while the backing net can be highly flexible overall, it also exhibits a certain degree of rigidity in some areas, which is the basis for the adjustment method used in this application. During the actual adjustment process, when adjusting a single backing net on the back of the soft porcelain, its inherent rigidity is greater than its deflection. If the single backing net is lifted by a person or an external device, its flexibility will be greater than its rigidity under its own weight, and the entire backing net will deform due to its own weight.

[0056] In step S300, during the process of rolling a back mesh and a corresponding soft porcelain, generally speaking, the cut back mesh will basically fit the soft porcelain. Therefore, after the end of the soft porcelain at one end of the conveying direction is aligned with the end of the back mesh, most areas of the soft porcelain and the back mesh are basically aligned. Only the end of the back mesh close to the feeding direction cannot be twisted along with the roller 320 due to the adhesive, so a second twist or even multiple twist rolling operations are required.

[0057] The present invention discloses an automatic correction device and correction method for a soft porcelain backing screen. The device and correction method utilize a positioning conveying mechanism 200 to position the conveyed soft porcelain, which is beneficial for later correction of the backing screen and ensures the accuracy of the correction. The device is designed with an adjustment component 310. The output end of the adjustment component 310 can drive a roller 320 to rotate in a direction perpendicular to the plane where the positioning conveying mechanism 200 is located. This design can utilize the contact between the roller 320 and the backing screen to enable the roller 320 to drive the backing screen to twist relative to the soft porcelain, thereby correcting the backing screen and ensuring that the backing screen is completely and correctly attached to the back of the soft porcelain. The visual system 400 is used to identify the degree of misalignment between the backing screen and the soft porcelain. The control system 500 then controls the conveying speed of the positioning conveying mechanism 200 and the rotation angle of the adjustment component 310 according to the feedback signal of the visual system 400, driving the backing screen to twist to correct its relative position with the soft porcelain. The entire adjustment process realizes automatic recognition and adjustment, with a high degree of automation and high work efficiency.

[0058] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An automatic correction device for soft porcelain backing screen, characterized in that: include frame; A positioning and conveying mechanism, which is installed on the frame and can position the soft porcelain conveyed thereon; A roller pressure adjustment mechanism is provided with an adjustment component, which is arranged on a frame above the positioning and conveying mechanism. A roller is rotatably mounted on the adjustment component, and the roller can cooperate with the positioning and conveying mechanism to compact the back net on the back of the soft porcelain; the output end of the adjustment component can rotate in a direction perpendicular to the plane where the positioning and conveying mechanism is located; two parallel shock-absorbing and centering components are provided on the adjustment end of the adjustment component, and the two ends of the roller can be rotatably mounted on the two shock-absorbing and centering components respectively. When the driving end of the adjustment component rotates, each of the shock-absorbing and centering components can automatically adjust the height of the rotation center of the corresponding end of the roller according to the force exerted on the roller when it contacts the back net, so as to adapt to The steering of the roller; the shock-absorbing and centering assembly includes a mounting block, wherein two parallel mounting plates are provided on the mounting block, and the two mounting plates are respectively provided with an open groove and a sliding groove downwardly, and the mounting plate with the open groove is provided on one side close to the middle of the adjustment assembly; the open end of the open groove is arranged in a trumpet shape, and both ends of the roller are provided with a frustum with the tip facing outward, and the outer wall of each frustum abuts against the inner wall of the open groove at the corresponding end, and the ends of the two frustums are rotatably mounted with a fixed block, and each fixed block is hinged with a slider, and the two sliders are respectively mounted in the sliding groove at the corresponding end, and a reset member is provided in each sliding groove, and the two ends of the reset member are respectively connected to the bottom of the corresponding end of the slide groove and the slider; A visual system is installed on the frame directly above the positioning and conveying mechanism; A control system is electrically connected to the visual system, the roller pressure adjustment mechanism, and the positioning and conveying mechanism. The control system can control the conveying speed of the positioning and conveying mechanism and the rotation angle of the adjustment component according to the feedback signal of the visual system, thereby driving the back mesh to twist to correct its relative position with the soft porcelain.

2. The automatic correction device for the back screen of a soft porcelain sticker according to claim 1, characterized in that: Two groups of reset members are arranged in each sliding groove, one end of each reset member is respectively arranged on both sides of the sliding block, and the other end of each reset member is connected to the bottom of the corresponding end of the sliding groove.

3. The automatic correction device for the back screen of a soft porcelain sticker according to claim 1, characterized in that: The end of the frustum is provided with a mounting shaft, and the mounting shaft is installed on the fixed block through a bearing. A rotating sleeve is provided between the inner ring of the bearing and the outer wall of the mounting shaft. The rotating sleeve rotates coaxially with the inner ring of the bearing. The rotating sleeve can slide along the axial direction of the mounting shaft. The inner ring of the rotating sleeve is provided with a keyway along the axial direction, and the outer wall of the mounting shaft is provided with a convex key that cooperates with the keyway.

4. The automatic correction device and correction method for the soft porcelain backing screen according to claim 1, characterized in that: The adjustment assembly includes a sliding seat, a servo motor and a U-shaped frame. The sliding seat can be slidably installed on the frame along the conveying direction of the positioning and conveying mechanism. The frame is provided with a sliding electric cylinder that drives the sliding seat to slide; the servo motor is installed on the sliding seat, and the middle part of the back side of the U-shaped frame is connected to the rotating end of the servo motor. The servo motor can drive the U-shaped frame to rotate. The servo motor and the sliding electric cylinder are both electrically connected to the control system, and both ends of the roller are connected to the two ends of the U-shaped frame through the shock-absorbing and centering assembly.

5. The automatic correction device for the back screen of a soft porcelain sticker according to claim 4, characterized in that: A buffer and shock-absorbing component is also provided between the rotating end of the servo motor and the U-shaped frame.

6. The automatic correction device for the back screen of a soft porcelain sticker according to claim 5, characterized in that: The buffer shock-absorbing assembly includes an upper flange and a lower flange. The upper flange is connected to the rotating end of the servo motor, and the lower flange is connected to the back of the U-shaped frame. The upper flange is movably mounted on the lower flange. A shock-absorbing spring is mounted on the outer surface of the upper flange. The two ends of the shock-absorbing spring are respectively connected to the end of the upper flange and the lower flange.

7. The automatic correction device for the back screen of a soft porcelain sticker according to claim 1, characterized in that: The positioning and conveying mechanism includes a conveyor belt, a conveying motor and a guide frame. The conveyor belt can be rotatably mounted on the frame. The conveying motor is mounted on one side of the frame and the output end is connected to the drive shaft of the conveyor belt. The conveying motor is electrically connected to the control system. The conveyor belt is provided with a positioning area on the feeding end and an adjustment area on the discharging end. A pair of guide frames are provided and are respectively arranged on both sides of the positioning area. The two guide frames are arranged in a trumpet shape at the feeding end. Several guide wheels are provided on the inner sides of the two guide frames. Limiting plates are provided on both sides of the adjustment area. The visual system is installed on the frame above the adjustment area.

8. A method for automatically correcting a soft porcelain backing mesh, the method being used on the automatic correction device for the soft porcelain backing mesh according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S100: The calibration device is started, the conveying motor rotates and drives the conveyor belt to operate normally. The conveyor belt receives the soft porcelain with the backing net piece by piece. After the soft porcelain passes through the positioning area of ​​the positioning conveying mechanism to position itself in the conveying posture and begins to enter the adjustment area, the vision system starts to work and the conveying speed of the conveyor belt is adaptively reduced. Step S200: The vision system captures and identifies the soft porcelain and the backing mesh placed in the adjustment area, and transmits the captured image data to the control system. The control system then identifies the soft porcelain and the backing mesh from the image data, and constructs separate contours of the soft porcelain and the backing mesh, respectively. The contour of the soft porcelain is used as a reference to compare the contour of the soft porcelain with the contour of the backing mesh to determine the degree and extent of misalignment. Step S300: The control system controls the direction of the servo motor and the extension and contraction of the sliding cylinder according to the degree and situation of the mutual misalignment between the soft porcelain and the backing screen, so that the roller can drive the backing screen to twist relative to the soft porcelain until the backing screen is aligned at one end of the feeding material and the corresponding end of the soft porcelain; After the backing mesh is located at one end of the feed material and is compacted and bonded to the corresponding end of the soft porcelain, the control system recognizes the mutual misalignment of the unrolled area based on the latest image data captured by the visual system and controls the steering of the servo motor; if the unrolled part of the backing mesh is not misaligned with the soft porcelain, the servo motor does not rotate, and the axis direction of the roller is perpendicular to the conveying direction of the conveyor belt; if the unrolled part of the backing mesh is misaligned with the soft porcelain, the area of ​​the unrolled part of the backing mesh that exceeds the soft porcelain outline is twisted twice along the conveying direction of the conveyor belt based on the outline of the soft porcelain; the above-mentioned roller pressure adjustment operation is repeated until the control system recognizes that there is no mutual misalignment in the unrolled area based on the latest image data captured by the visual system; Step S400: After the roller completely rolls the back screen onto the back of the soft porcelain, the conveyor belt outputs the soft porcelain to the adjustment area, and the servo motor drives the roller to reset, waiting for the next piece of soft porcelain to enter the adjustment area, and repeating the operations of steps S200-300.

Images