Visual recognition deviation correction system and printing press

Abstract

The present application relates to the technical field of printing machine deviation correction, in particular to a visual recognition deviation correction system and a printing machine, the deviation correction system comprising a rack and a conveying mechanism arranged in the rack, and a printing assembly arranged above the rack; a detection mechanism is arranged in the rack, and the detection mechanism comprises a base; a detection unit, a light source and a first visual recognition unit are arranged on the base; the detection unit is used to monitor the tension change of the roll material in real time, and the signal reflecting the tension change is transmitted to the light source, so that the light coverage area can be changed accordingly with the tension change of the roll material, thereby converting the slight tension change of the roll material into a more obvious change of the light blocking area, facilitating the first visual recognition unit to capture the position deviation of the edge of the roll material more accurately, and significantly improving the detection sensitivity and recognition accuracy of the deviation correction system to the slight deviation of the roll material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing machine deviation correction, in particular to a visual recognition deviation correction system and a printing machine. BACKGROUND

[0002] When the printing machine prints the roll material at high speed, the roll material needs to go through multiple roller transmission and drying processes. In this process, the heat generated by friction and compression of the roller and the high-temperature environment of the drying process will be continuously transmitted to the roll material through the roller, causing the roll material to have significant temperature-sensitive deformation. As a result, the edges of the roll material are prone to form wavy burrs. In the process of high-speed printing, the printing machine needs to correct the deviation of the roll material. The deviation correction systems used in the prior art are mostly realized by photoelectric sensors, but errors are prone to occur. When the roll material deforms due to high temperature, the deviation correction system is difficult to detect, and false detection is prone to occur.

[0003] For example, a kind of automatic deviation correction device, guide tape machine and ink-jet printer are disclosed in Chinese patent authorized publication No.CN206335997U. The basic deviation correction control of medium position is realized by the cooperation of transmission mechanism, detection mechanism and deviation correction mechanism, but it only focuses on the real-time detection and mechanical adjustment of the physical position of the roll material, such as monitoring the edge deviation by photoelectric switch and correcting the trajectory by mechanical force of deviation correction roller. The patent does not involve the problem of false detection or identification caused by temperature deformation of the roll material. The detection mechanism can only sense the geometric position deviation of the edge of the roll material, and cannot identify the change and deviation of the roll material caused by temperature deformation. SUMMARY

[0004] To solve the above problems, a visual recognition deviation correction system and a printing machine are provided. The detection unit monitors the tension change of the roll material in real time, and transmits the signal reflecting the tension change to the light source, so that the light coverage area can change accordingly with the tension change of the roll material. Thus, the subtle tension change of the roll material is converted into more obvious changes in the light blocking area, which facilitates the first visual recognition unit to capture the position deviation of the edge of the roll material more accurately, and significantly improves the detection sensitivity and recognition accuracy of the deviation correction system to the small deviation of the roll material.

[0005] In order to solve the prior art problems, the application provides a visual identification deviation rectifying system, which comprises a rack and a conveying mechanism arranged in the rack, the conveying mechanism comprising a conveying roller for conveying a roll material and a deviation rectifying roller for adjusting the position of the roll material; a printing assembly capable of reciprocating along the axial direction of the roller shaft and printing the roll material is arranged above the rack; a detection mechanism is arranged in the rack, the detection mechanism comprising a base capable of moving along the axial direction of the roller shaft; the base is provided with a detection unit for monitoring the tension change of the roll material in real time and a rotatable light source; the light source can emit light to the edge area of the roll material, receive a control signal from the detection unit, and adjust the rotation angle of the light according to the control signal; a first visual identification unit capable of collecting light signal data blocked by the edge of the roll material is arranged above the light source on the base.

[0006] Preferably, the detection unit is a distance sensor, and a piezoelectric motor electrically connected to the distance sensor is arranged on the base, the piezoelectric motor being capable of driving the light source to rotate according to the detection signal of the distance sensor so as to adjust the angle of the light.

[0007] Preferably, the detection unit comprises a mounting seat arranged on the base, the mounting seat being provided with a support rod threadedly matched therewith, the support rod being of a resiliently stretchable structure, and a roller being arranged at an end of the support rod away from the mounting seat and being in contact with the roll material.

[0008] Preferably, a pulley is arranged at an end of the support rod away from the roller, the light source being rotatably arranged above the support rod, the light source being provided with a sliding groove extending in the height direction on a side thereof close to the support rod, and the pulley being slidably arranged in the sliding groove.

[0009] Preferably, the mounting seat is rotatably mounted on the base, and a screw rod capable of fixing the mounting seat is arranged on the base.

[0010] Preferably, the detection mechanism has two, and the two detection mechanisms are in mirror image state and are respectively arranged on two ends of the rack.

[0011] Preferably, the printing assembly is further provided with a second visual identification unit, the second visual identification unit comprising a support frame fixedly connected to a side of the printing assembly and a visual camera arranged on the support frame.

[0012] Preferably, the base is further provided with a temperature sensor for identifying the temperature of the roll material.

[0013] Preferably, the conveying roller is of a hollow structure, and a spiral cooling flow channel is arranged in the conveying roller.

[0014] A printing machine comprising the above visual identification deviation rectifying system.

[0015] The application has the following beneficial effects compared with the prior art:

[0016] 1. The present application monitors the tension change of the web in real time through the detection unit, and transmits the signal reflecting the tension change to the light source. After receiving the control signal, the light source adjusts the rotation angle of the light, so that the light coverage area can change accordingly with the tension change of the web. The detection unit, the first visual recognition unit and the light source form a high-sensitivity edge detection system through precise cooperation: the system can accurately identify the small deviation that is difficult to detect by traditional schemes, significantly improving the detection sensitivity and recognition accuracy of the edge position of the high-speed moving web, and ensuring the stable transmission and accurate processing of the web under complex working conditions.

[0017] 2. The present application amplifies the tension change of the web surface through the rotatable light source, and converts the small deformation caused by temperature into quantifiable image features (such as the period frequency of the corrugation). The controller at the rear end can accurately distinguish the edge corrugation caused by thermal expansion from the flash caused by mechanical stress, and then adjust the correction strategy. The high-precision recognition ability of temperature-sensitive deformation enables the system to maintain stable correction accuracy in high-temperature and high-speed printing environment, significantly improving the yield of web processing under complex working conditions.

[0018] 3. The second visual recognition unit can collect the image and text overprint quality of the web surface in real time in the printing area, and can also monitor the projection state of the light source emitted by the detection unit on the web surface. Therefore, the signal detected by the first recognition unit is rechecked. If the light source angle deviates or the light intensity decays, the rear-end control system will be triggered immediately, so as to adjust the deviation of the web. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective structural schematic diagram of the visual recognition correction system.

[0020] Figure 2 is a front view of the visual recognition correction system.

[0021] Figure 3 is a perspective structural schematic diagram of the rack, conveying mechanism and detection mechanism of the visual recognition correction system.

[0022] Figure 4 is a cross-sectional perspective structural schematic diagram of the rack, conveying mechanism and detection mechanism of the visual recognition correction system.

[0023] Figure 5 is a cross-sectional structural schematic diagram of the rack, conveying mechanism and detection mechanism of the visual recognition correction system.

[0024] Figure 6 is a perspective structural schematic diagram of the detection mechanism in the first embodiment of the visual recognition correction system.

[0025] Figure 7is a side view of the light source rotation of the detection mechanism in the second embodiment of the visual identification deviation correction system.

[0026] Figure 8 is a perspective view of the detection mechanism in the second embodiment of the visual identification deviation correction system.

[0027] Figure 9 is an exploded view of the detection mechanism in the second embodiment of the visual identification deviation correction system.

[0028] Figure 10 is a cross-sectional view of the conveying roller of the visual identification deviation correction system.

[0029] Reference numerals in the drawings are:

[0030] 1, frame; 11, conveying mechanism; 111, conveying roller; 1111, cooling flow channel; 112, deviation correction roller; 12, printing assembly; 121, second visual identification unit; 1211, support frame; 1212, visual camera; 2, detection mechanism; 21, base; 211, detection unit; 2111, distance sensor; 2112, mounting seat; 21121, support rod; 21122, roller; 21123, pulley; 21124, screw rod; 212, light source; 2121, piezoelectric motor; 2122, sliding groove; 213, first visual identification unit; 214, temperature sensor; 3, roll material. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in combination with the drawings and specific embodiments.

[0032] As Figures 1 to 5 shown: a visual identification deviation correction system, comprising a frame 1 and a conveying mechanism 11 arranged in the frame 1, the conveying mechanism 11 comprising a conveying roller 111 for conveying a roll material 3 and a deviation correction roller 112 for adjusting the position of the roll material 3; a printing assembly 12 is arranged above the frame 1 and can move back and forth along the axis direction of the roller shaft and print on the roll material 3; a detection mechanism 2 is arranged in the frame 1, the detection mechanism 2 comprising a base 21 which can move along the axis direction of the roller shaft; the base 21 is provided with a detection unit 211 for real-time monitoring of the tension change of the roll material 3 and a rotatable light source 212; the light source 212 can emit light to the edge area of the roll material 3, receive a control signal from the detection unit 211, and adjust the rotation angle of the light according to the control signal; a first visual identification unit 213 is arranged above the light source 212 on the base 21 and can collect the light signal data blocked by the edge of the roll material 3.

[0033] The conveying mechanism 11 in the rack 1 drives the coil material 3 to convey along a predetermined direction by the conveying roller 111, and the printing assembly 12 above the rack 1 reciprocates along the roller shaft axis direction to perform printing operation on the surface of the conveying coil material 3.

[0034] The detection mechanism 2 in the rack 1 synchronously moves the detection unit 211, the light source 212 and the first visual recognition unit 213 by the base 21 movable along the roller shaft axis, so that the detection mechanism 2 can adapt to coil materials 3 of different widths, and ensure that the detection range is dynamically adjusted according to the width of the coil material 3, thereby significantly improving the versatility of the equipment in diversified production scenarios and reducing the changeover debugging time.

[0035] The detection unit 211 monitors the tension change of the coil material 3 in real time, and transmits a signal reflecting the tension change to the light source 212. After receiving the control signal, the light source 212 adjusts the rotation angle of the light, so that the light coverage area can change accordingly with the tension change of the coil material 3. When the tension of the coil material 3 changes slightly, the adjustment of the angle of the light source 212 will cause the amplification effect of the irradiation position and range of the light on the edge of the coil material 3. This amplification effect converts the original slight tension change into a more obvious change in the light blocking area, which facilitates the first visual recognition unit 213 to more accurately capture the position deviation of the edge of the coil material 3, and significantly improves the detection sensitivity and recognition accuracy of the correction system to the slight deviation of the coil material 3. By converting the tension change into a quantifiable optical signal change, the correction system realizes high-precision detection of the deviation of the coil material 3, and enhances the stability and reliability of the system in a high-speed running environment.

[0036] At this time, the first visual recognition unit 213 above the light source 212 collects the light signal data blocked by the edge of the coil material 3, obtains the position information of the edge of the coil material 3 by analyzing such data, and determines the transverse deviation of the coil material 3. The controller at the rear end integrates the tension data of the detection unit 211 and the deviation data of the first visual recognition unit 213, generates a correction control signal after processing, and drives the correction roller 112 to act, thereby realizing accurate adjustment of the position of the coil material 3.

[0037] Compared with the traditional fixed light source 212 scheme, which can only detect obvious position deviation and is helpless for hidden defects caused by thermal deformation, the dynamic light source 212 of the present application can amplify the tension change on the surface of the coil material 3 by rotation, and convert the slight deformation caused by temperature into quantifiable image features (such as the period frequency of the corrugation). The controller at the rear end can accurately distinguish the edge corrugation caused by thermal expansion from the flash caused by mechanical stress, and then adjust the correction strategy. This high-precision recognition capability for temperature-sensitive deformation enables the system to maintain stable correction accuracy in a high-temperature and high-speed printing environment, thereby significantly improving the yield of the coil material 3 processing under complex working conditions.

[0038] As Figures 1 to 6As shown: the detection unit 211 is a distance sensor 2111, and the base 21 is provided with a piezoelectric motor 2121 electrically connected thereto, and the piezoelectric motor 2121 can drive the light source 212 to rotate according to the detection signal of the distance sensor 2111, so as to adjust the light angle.

[0039] First embodiment: when the roll material 3 is slightly offset or deformed due to tension fluctuation, the distance sensor 2111 detects the change of the distance between the roll material 3 surface and itself in real time, and transmits this signal to the piezoelectric motor 2121; the piezoelectric motor 2121 drives the light source 212 to rotate, so that the light irradiation position and range on the edge of the roll material 3 are amplified with the angle adjustment of the light source 212, that is, the slight distance change caused by tension fluctuation is converted into more significant light projection area change through the rotation of the light source 212 angle, for example, when the edge of the roll material 3 is offset by a small distance due to tension fluctuation, the transverse coverage range of the light irradiation will change several times the offset amount, so as to convert the subtle tension signal into an optical signal difference that is easy for the visual recognition unit to capture. The first visual recognition unit 213 can more clearly distinguish the dynamic characteristics of the edge of the roll material 3 by analyzing this amplified light signal data, and then accurately calculate the offset amount.

[0040] With the amplification effect of the light source 212 angle adjustment on the tension fluctuation signal, the detection sensitivity of the system to the slight change of the edge of the roll material 3 is significantly improved, even weak tension fluctuation can be identified through obvious changes in the optical signal, effectively avoiding the missed detection problem caused by weak signal in the traditional fixed light source 212 scheme; the direct correlation between the light source 212 angle adjustment and the tension fluctuation makes the detection process more in line with the physical mechanism of the deformation of the roll material 3, enhancing the rationality and reliability of the detection logic; the amplified optical signal provides clearer edge feature information for the visual recognition unit, reduces the algorithm misjudgment caused by signal ambiguity, and improves the accuracy of the offset amount calculation; at the same time, this signal amplification method through optical angle adjustment does not need to increase complex mechanical or electronic amplification components, which simplifies the system structure, reduces the hardware cost, maintains the compactness and stability of the detection mechanism 2, and is convenient for integrated application in printing equipment.

[0041] As shown in Figures 1 to 5 and Figures 7 to 9 As shown: the detection unit 211 includes a mounting seat 2112 provided on the base 21, and the mounting seat 2112 is provided with a support rod 21121 threadedly matched therewith, the support rod 21121 is a structure capable of elastic extension and contraction, and the support rod 21121 is provided with a roller 21122 at an end away from the mounting seat 2112, and the roller 21122 is in contact with the roll material 3.

[0042] Second embodiment: when the web 3 produces lateral deviation or fluctuation due to tension change during conveying, the roller 21122 in contact with the surface of the web 3 will produce corresponding displacement with the change of the position of the web 3. Since the support rod 21121 is a structure capable of elastic extension and contraction, the displacement of the roller 21122 will cause the support rod 21121 to elastically deform, and the degree of deformation is directly proportional to the size of the tension of the web 3. At the same time, by rotating the support rod 21121 which is threadedly connected with the mounting seat 2112, the axial extension length thereof can be adjusted, so as to adjust the initial contact pressure between the roller 21122 and the web 3, so as to adapt to the web 3 with different thicknesses or materials. This structure enables the detection unit 211 to convert the tension change of the web 3 into the elastic deformation signal of the support rod 21121 in real time, and converts it into an electrical signal through the subsequent circuit and transmits it to the control system, so as to provide the basis for the angle adjustment of the light source 212 and the deviation correction control.

[0043] By the integrated setting of the threaded adjustment and the elastic extension and contraction, the structure is simplified, the number of parts is reduced, and the manufacturing cost and maintenance difficulty are reduced; the elastic extension and contraction support rod 21121 can automatically adapt to the slight ups and downs on the surface of the web 3, so as to maintain the stable contact between the roller 21122 and the web 3, and the stability and reliability of the tension detection are improved; the threaded adjustment mode can quickly realize the adaptation to the web 3 with different thicknesses, so as to expand the application range of the system; the rolling contact mode between the roller 21122 and the web 3 avoids the surface damage of the web 3 which may be caused by sliding friction, and is suitable for high-precision printing and processing of sensitive materials.

[0044] As shown in Figures 1 to 5 and Figures 7 to 9 : the end of the support rod 21121 away from the roller 21122 is provided with a pulley 21123, the light source 212 is rotatably arranged above the support rod 21121, the side of the light source 212 close to the support rod 21121 is provided with a sliding groove 2122 extending in the height direction, and the pulley 21123 is slidably arranged in the sliding groove 2122.

[0045] When the tension change of the web 3 causes the roller 21122 to produce displacement with the ups and downs on the surface of the web 3, the support rod 21121 connected with the roller 21122 will elastically deform and drive the pulley 21123 at the end thereof to slide in the sliding groove 2122 of the light source 212. Since the sliding groove 2122 extends in the height direction, the sliding of the pulley 21123 will force the light source 212 to produce angle change around the rotating support point thereof, change the angle and position of the light projection to the edge of the web 3, the rotation will amplify the optical signal difference corresponding to the tension change, and the slight displacement of the edge of the web 3 due to the tension fluctuation will be converted into more significant light and shadow boundary displacement or gradient change of illumination intensity through the rotation of the light source 212, so that the visual identification unit can capture the subtle edge features which are difficult to be distinguished by the traditional fixed light source 212.

[0046] Through the mechanical linkage of the pulley 21123 and the chute 2122, the automatic adjustment of the angle of the light source 212 with the change of the tension can be realized without additional electronic control elements. The mechanical transmission characteristics are used to convert the small tension signal of the roll material 3 into an amplified optical signal change, which significantly improves the detection sensitivity of the system to subtle edge fluctuations. This physical quantity amplification mechanism simplifies the structure of the correction system, reduces the cost and maintenance difficulty, and avoids the signal delay or distortion problems that may exist in electronic elements. The continuity of the rotation of the light source 212 makes the optical signal amplification process smooth and stable, providing clearer edge feature data for visual recognition and effectively improving the accuracy of the offset calculation.

[0047] As shown in Figures 1 to 5 and Figures 7 to 9 : The mounting seat 2112 is rotatably mounted on the base 21, and the base 21 is provided with a screw 21124 capable of fixing the mounting seat 2112.

[0048] The mounting seat 2112 is rotatably mounted on the base 21 by a bearing (not shown in the figure) to adjust the azimuth angle of the detection unit 211. The screw 21124 provided on the base 21 and threadedly matched therewith can directly abut the mounting seat 2112 against the base 21. When it is necessary to adjust the detection position, the screw 21124 is loosened to disengage the mounting seat 2112 from the close abutment, and the mounting seat 2112 is manually rotated to align the detection unit 211 with the target detection area of the roll material 3. After the adjustment is completed, the screw 21124 is tightened to fix the rotation angle of the mounting seat 2112 by using the friction force, so that the mounting seat 2112 will not be displaced due to vibration or movement of the roll material 3 during the detection process. The above-mentioned mode makes the azimuth adjustment of the detection unit 211 flexible, and the detection position can be quickly adjusted according to the width, edge shape or detection requirement of the roll material 3, thereby improving the adaptability of the correction system to different specifications of the roll material 3. The above-mentioned mode significantly simplifies the equipment debugging process, shortens the preparation time during the change of production, improves the efficiency and convenience of industrial production, and is especially suitable for complex scenes of co-linear production of multi-specification roll materials 3.

[0049] As shown in Figures 1 to 3 : The detection mechanism 2 has two, and the two detection mechanisms 2 are in mirror image state and located at the two ends of the rack 1, respectively.

[0050] Two detection mechanisms 2 are distributed in a mirror-symmetrical manner at both ends of the rack 1, realizing synchronous real-time detection of the edges or surface features of the two sides of the roll material 3. When the roll material 3 occurs lateral deviation in high-speed conveying, the two-side detection mechanisms 2 synchronously collect the position deviation signals of the left and right edges, and transmit the data to the control system in real time. By analyzing the difference between the two-side data, the controller can accurately determine the deviation direction of the roll material 3 and quantify the deviation amplitude, and then drive the correction roller 112 to dynamically adjust the tension of the corresponding area of the roll material 3. The symmetrical layout ensures the mutual verification of the detection signals, avoids misjudgment caused by single-sided sensor error or local interference, and enables the correction system to accurately capture the overall lateral movement trend of the roll material 3. The reliability of the system for detecting the deviation of the roll material 3 is significantly improved, especially in complex working conditions such as single-side tension fluctuation and local thermal deformation, which can effectively filter single-sided signal interference and reduce the false detection rate.

[0051] The sliding guide structure is formed by the linear guide rails and high-precision sliders arranged at both ends of the rack 1, so that the detection mechanism 2 can smoothly slide along the axis direction of the conveying roller 111. The slider fixedly installed at the bottom of each detection mechanism 2 precisely cooperates with the guide rail, and cooperates with the servo motor or ball screw driving assembly to realize the position fine adjustment of the detection mechanism 2. When it is necessary to adapt to roll materials 3 of different widths or calibrate the detection position, the driving system can accurately control the synchronous or independent sliding of the detection mechanisms 2 at both ends of the rack 1, ensuring that the detection unit 211 always aligns with the target detection area of the edges of the two sides of the roll material 3.

[0052] As shown in Figure 1 and Figure 2 , the printing assembly 12 is further provided with a second visual recognition unit 121. The second visual recognition unit 121 includes a support frame 1211 fixedly connected to the side of the printing assembly 12 and a visual camera 1212 arranged on the support frame 1211.

[0053] The support frame 1211 fixedly connected to the side of the printing assembly 12 provides a stable mounting basis for the visual camera 1212, so that it can not only collect the graphic overprint quality of the surface of the roll material 3 in real time, but also can synchronously monitor the projection state of the light source 212 emitted by the detection unit 211 on the surface of the roll material 3. When the light source 212 of the detection unit 211 irradiates to the edge or feature area of the roll material 3, the visual camera 1212 will capture the light band position, brightness uniformity and edge profile light contrast formed by the light source 212 when it moves to the edge of the roll material 3 with the printing assembly 12, and compare these light source 212 projection signals with the preset standard parameters, thereby rechecking the signals detected by the first recognition unit. If it is found that the light source 212 deviates due to vibration, temperature change or angle deviation or light intensity attenuation, the control system will trigger the rear-end control system in time, so as to adjust the deviation of the roll material 3.

[0054] Through re-inspection of the light source 212 of the detection unit 211, a closed-loop monitoring mechanism for the optical detection system is established, avoiding misjudgment of the edge position caused by drift of the light source 212 and reducing the false detection rate of the correction system. The visual camera 1212 simultaneously undertakes the dual functions of printing quality detection and light source 212 state monitoring, realizes the expansion of the detection function without increasing the hardware cost, and improves the system integration. The state of the light source 212 can be fed back in real time, so that the correction system can dynamically compensate the influence of environmental changes on optical detection, ensuring the consistency of edge detection accuracy in high-speed printing process; and the cooperation with the printing pattern recognition function enables the second visual recognition unit 121 to monitor the graphic text overprint quality and ensure the reliability of the light source 212 of the front-end detection mechanism 2, forming a full-link quality control from the light source to the image recognition, which significantly enhances the anti-interference ability and long-term operation stability of the system in complex industrial environment.

[0055] As shown in Figures 4 to 9 , the base 21 is further provided with a temperature sensor 214 for identifying the temperature of the web 3.

[0056] When the substrate expands or shrinks due to factors such as printing drying and environmental temperature fluctuation, the temperature sensor 214 can capture the temperature change trend in real time. Based on the temperature compensation data, the control system at the rear end synchronously adjusts the transportation speed of the conveying mechanism 11, avoiding detection errors or correction lag caused by temperature deformation.

[0057] Through real-time temperature monitoring, the correction system can adapt to the changes in the thermal physical properties of the web 3 at different process stages, reducing the edge offset detection error rate caused by temperature; the linkage mechanism of temperature data and the detection mechanism 2 enables the correction system to change from passive response to offset to active prediction compensation, for example, before the web 3 enters the high-temperature drying section, the light source and tension parameters are adjusted in advance according to the preset temperature curve, improving the correction control accuracy under complex conditions; the temperature sensor 214 can work cooperatively with the existing detection mechanism 2, forming a multi-dimensional data fusion detection system, enhancing the traceability analysis ability of the correction system to the deformation reasons of the web 3, facilitating the targeted adjustment of process parameters by the operator, reducing batch quality problems caused by temperature abnormalities, and improving the stability and yield of industrial production.

[0058] As shown in Figures 1 to 3 and Figure 10 , the conveying roller 111 has a hollow structure, and the conveying roller 111 is provided with a spiral cooling flow channel 1111.

[0059] One end of the cooling flow channel 1111 is connected with an external cooling system (such as a water chiller, an air compressor) through a rotary joint, and the other end forms a closed circulation loop after sealing treatment. When the conveying roller 111 rotates at a high speed, the cooling system will drive the cooling medium into the cooling flow channel 1111. Since the cooling flow channel 1111 is spiral, the cooling medium will make spiral advancing motion along the spiral cooling flow channel 1111, and through the forced convection heat exchange between the roller wall of the conveying roller 111 and the surface of the coil material 3, the conveying roller 111 absorbs the heat generated by the coil material 3 due to printing, drying, friction and the like. The spiral cooling flow channel 1111 forms a continuous and uniform flow trajectory in the conveying roller 111, prolongs the heat exchange time, enhances the control ability of the surface temperature of the conveying roller 111, ensures that the coil material 3 maintains a constant temperature environment during conveying, avoids deformation, adhesion or chemical property change caused by high temperature, and further improves the reliability and process adaptability of the coil material 3 during printing under complex working conditions.

[0060] The hollow structure of the conveying roller 111 provides a space for installing the cooling flow channel 1111, and the hollow roller body structure reduces the weight of the conveying roller 111 under the premise of ensuring the strength, and reduces the load energy consumption of the driving motor.

[0061] A printing machine comprising the above-mentioned visual identification deviation correction system.

[0062] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the protection scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A visual recognition and correction system, including a frame and a conveying mechanism disposed within the frame, the conveying mechanism including a conveying roller for conveying the roll material and a correction roller for adjusting the position of the roll material; A printing assembly is provided above the frame, capable of reciprocating along the axis of the roller and printing on the roll material; characterized in that, The frame is equipped with a detection mechanism, which includes a base that can move along the axis of the roller. The base is equipped with a detection unit for real-time monitoring of changes in the tension of the roll material and a rotating light source; The light source can emit light towards the edge area of ​​the roll material and receive control signals from the detection unit, and adjust the rotation angle of the light according to the control signals; A first visual recognition unit capable of collecting light signal data blocked by the edge of the roll material is set on the base above the light source; The detection unit includes a mounting base on the base, a support rod threaded to the mounting base, the support rod having an elastic telescopic structure, and a roller on the end of the support rod away from the mounting base, the roller contacting the roll material; A pulley is provided at the end of the support rod away from the roller. The light source is rotatably positioned above the support rod. A groove extending along the height direction is provided on the side of the light source near the support rod, and the pulley is slidably positioned in the groove.

2. The visual recognition and correction system according to claim 1, characterized in that, The detection unit is a distance sensor, and a piezoelectric motor electrically connected to it is installed on the base. The piezoelectric motor can drive the light source to rotate according to the detection signal of the distance sensor in order to adjust the illumination angle.

3. The visual recognition and correction system according to claim 1, characterized in that, The mounting base is rotatably mounted on the base, and the base is provided with screws to fix the mounting base.

4. The visual recognition and correction system according to claim 1, characterized in that, There are two testing units, which are located at opposite ends of the frame in a mirror image configuration.

5. The visual recognition and correction system according to claim 4, characterized in that, The printing assembly is also equipped with a second visual recognition unit, which includes a support frame fixedly connected to the side of the printing assembly and a visual camera mounted on the support frame.

6. The visual recognition correction system according to any one of claims 1-5, characterized in that, The base is also equipped with a temperature sensor that identifies the temperature of the roll material.

7. The visual recognition correction system according to any one of claims 1-5, characterized in that, The conveyor roller has a hollow structure and a spiral cooling channel inside.

8. A printing press, characterized in that, Includes the visual recognition correction system as described in any one of claims 1-7.

Images