A gravure printing roller detection device and its detection method

Abstract

This invention provides a gravure printing roller inspection device and method, belonging to the field of printing roller inspection technology. The gravure printing roller inspection device includes a mounting base plate and a control device. The top of the mounting base plate is connected to a support mechanism via a first transmission mechanism. It also includes an inspection mechanism and inspection contacts. Through the installation of the mounting component, when adjusting the contact degree between the ball and the surface of the gravure printing roller, the mounting component moves towards the dial indicator, causing the second piston plate to squeeze the hydraulic oil inside the first chamber. The hydraulic oil passes through a proportional valve and enters the four guide pipes, pushing the first piston plate towards the limiting ring inside the first slide groove. The resistance of the extrusion rod moving from the slot to the guide groove can be adjusted by the contact degree between the ball and the surface of the gravure printing roller, improving adaptability and preventing the ball from rotating directly when inspecting coaxiality and straightness, thereby improving the accuracy of surface defect detection.

Description

Technical Field

[0001] This invention belongs to the field of printing roller inspection technology, specifically relating to a gravure printing roller inspection device and its inspection method. Background Technology

[0002] A gravure printing roller is a type of roller used in printing, primarily in the gravure printing process. It is made of a hollow metal tube with patterns of a certain depth and shape on its surface, typically various types of grooves or holes. The gravure printing roller plays a crucial role in the printing process; its surface quality directly affects the quality of the printed product. If the surface of the gravure printing roller has defects such as scratches or dents, it will lead to corresponding quality problems in the printed product, such as unclear patterns or uneven colors. Therefore, regular inspection of the gravure printing roller is one of the important measures to ensure the quality of printed products.

[0003] Chinese Patent Application No. 202310881717.0 discloses a gravure printing roller inspection device and method. The gravure printing roller inspection device includes a base plate, with two side plates fixedly connected to the left and right sides of the upper surface of the base plate. A first rotating shaft is rotatably connected between the two side plates via bearings. Multiple first roller assemblies are movably disposed on the outer surface of the first rotating shaft. A first groove is formed on the upper surface of the side plates, and a movable plate is disposed inside the first groove. A second rotating shaft is rotatably connected between the two movable plates via bearings. This invention can adapt to gravure printing rollers of different sizes, and the assistance of a motor makes roller inspection more convenient, improving work efficiency and reducing labor intensity. Simultaneously, the lifting assembly allows the first and second rubber wheels to move left and right, thereby preventing wear on the marker pen marks on the first and second rubber wheels during the rotation of the gravure printing roller, and better identifying defects in the gravure printing roller.

[0004] Similar to the devices described above, when detecting surface defects on gravure printing rollers, visual observation is used. However, visual observation alone cannot directly detect the straightness and coaxiality of the gravure printing rollers, nor can it detect small defects on the surface of the gravure printing rollers. These small defects will cause the surface of the gravure printing rollers to be uneven. When detecting the straightness or coaxiality of the gravure printing rollers, these small defects will affect the accuracy of the detection of the straightness and coaxiality of the gravure printing rollers, and it will be impossible to determine whether the straightness and coaxiality are affected by surface defects.

[0005] Therefore, in order to solve the above problems, it is necessary to provide a gravure printing roller detection device and its detection method. Summary of the Invention

[0006] The purpose of this invention is to provide a gravure printing roller detection device and method, which aims to solve the problem that defects on the surface of gravure printing rollers affect the accuracy of gravure printing roller straightness and coaxiality detection in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A gravure printing roller detection device includes a mounting base plate and a control device. A support mechanism is connected to the top of the mounting base plate via a first transmission mechanism. The device further includes: a detection mechanism connected to the top of the mounting base plate via a second transmission mechanism; the detection mechanism includes a movable frame; a dial indicator is connected to one side of the movable frame via an adjustment mechanism; the dial indicator is electrically connected to the control device, which receives the detection data from the dial indicator; and a detection contact connected to the detection end of the dial indicator. The detection contact includes a mounting component with an internal cavity. An isolation plate is fixedly connected to the inner wall of the cavity, dividing the cavity into a first chamber and a second chamber. A flow guide chamber is fixedly connected to the second chamber, and a limit rod is fixedly connected to the bottom of the flow guide chamber. A through groove is formed at the bottom of the mounting component, corresponding to the position of the limit rod. A limit groove is formed at the bottom of the limit rod, and a ball is positioned between the limit groove and the through groove.

[0009] Preferably, the bottom of the flow guide chamber is fixedly connected to four flow guide tubes that are circumferentially equidistant. The outer wall of each flow guide tube is fixedly connected to a horizontally arranged slide rod. Each slide rod has a flow guide groove inside that communicates with the corresponding flow guide tube. A limit ring is slidably connected inside each flow guide groove. A squeezing rod is fixedly connected to the inner side of each limit ring. One end of each squeezing rod near the limit rod passes through the corresponding slide rod. The outer wall of each limit rod is slidably connected to the corresponding slide rod. The inner wall of each flow guide groove has a first sliding groove. A first piston plate is slidably connected inside each first sliding groove. A first elastic element is connected between each first piston plate and the corresponding limit ring.

[0010] Preferably, each of the flow guide channels has a first conductive sheet on its inner wall and a second conductive sheet corresponding to the position of the first conductive sheet on the outer wall of the limiting ring inside each of the flow guide channels. Each first conductive sheet and the second conductive sheet are electrically connected to the control device. When the first conductive sheet and the corresponding second conductive sheet are connected and conducting electricity, the control device can detect the conductive signal of the corresponding first conductive sheet and the second conductive sheet.

[0011] Preferably, the outer wall of the ball has two vertically staggered guide grooves, and each guide groove has two symmetrically arranged slots inside. The two slots inside one guide groove are perpendicular to the two slots inside the other guide groove, and the four slots are on the same plane. The connection between each slot and the corresponding guide groove is wedge-shaped. Every two symmetrically arranged slide rods can slide inside the same guide groove, and the four extrusion rods can correspond one-to-one with the positions of the four slots.

[0012] Preferably, the isolation plate has a drainage pipe inside that communicates with the first chamber, and the flow guide chamber has a proportional valve inside that communicates with the drainage pipe. The proportional valve is connected to four flow guide pipes via connecting pipes. A second piston plate is slidably connected inside the first chamber. A second elastic element is connected between the bottom of the second piston plate and the isolation plate. A connector that penetrates the mounting component is fixedly connected to the top of the second piston plate. The other end of the connector is fixedly connected to the detection end of the dial indicator. The outer wall of the connector is slidably connected to the mounting component.

[0013] Preferably, the adjustment mechanism includes a first electric lead screw disposed on the movable frame, a first sliding member threadedly connected to the first electric lead screw, a second electric lead screw perpendicular to the first electric lead screw disposed on the first sliding member, a second slider threadedly connected to the second electric lead screw, and the second slider being fixedly connected to the dial indicator. Driving the first electric lead screw can adjust the up-and-down movement of the first sliding member and the second electric lead screw, and driving the second electric lead screw can adjust the back-and-forth movement of the second slider and the dial indicator.

[0014] Preferably, the support mechanism includes two mounting frames, each mounting frame having two symmetrically arranged support members fixedly connected to its top. A mounting plate is fixedly connected between the two support members on the same mounting frame. Two symmetrically arranged support rollers are rotatably connected to opposite sides of the two mounting plates. Each mounting frame has two driven wheels connected to its two support rollers. The bottom of the mounting frame has a placement groove, inside which a drive motor is installed. A drive wheel is mounted on the output shaft of the drive motor, and the drive wheel is connected to the two driven wheels via a synchronous belt.

[0015] Preferably, the first transmission mechanism includes a guide rod and a third electric lead screw disposed on the top of the mounting base plate. Two first moving parts are fixedly connected to the bottom of one of the mounting brackets. One of the first moving parts is slidably connected to the guide rod, and the other first moving part is threadedly connected to the third electric lead screw. Driving the third electric lead screw can adjust the distance between the two mounting brackets. The second transmission mechanism includes a fourth electric lead screw disposed on the top of the mounting base plate. Two second moving parts are fixedly connected to the bottom of the movable bracket. One of the second moving parts is slidably connected to the guide rod, and the other second moving part is threadedly connected to the fourth electric lead screw. Driving the fourth electric lead screw can move the movable bracket left and right between the two mounting brackets.

[0016] Preferably, the first chamber is filled with hydraulic oil, and the second piston plate can squeeze the hydraulic oil inside the first chamber, allowing the hydraulic oil to pass through the guide pipe and enter the proportional valve. The hydraulic oil entering the proportional valve can evenly enter the four guide pipes.

[0017] A method for detecting gravure printing rollers includes the following steps:

[0018] S1: First, adjust the distance between the two mounting brackets by driving the third electric lead screw to match the length of the gravure printing roller. Then, place the two ends of the gravure printing roller to be tested between the two support rollers on the two mounting plates for support.

[0019] S2: By driving the first electric lead screw and the second electric lead screw, the detection position of the dial indicator and the degree of contact between the detection contact and the surface of the gravure printing roller are adjusted;

[0020] S3: Start the drive motor to rotate, which drives the gravure printing plate roller on the support roller to rotate, so that the dial indicator can perform coaxiality detection.

[0021] S4: Drives the fourth electric lead screw to move the moving frame from the vicinity of one mounting frame to the vicinity of another mounting frame, enabling the dial indicator to perform straightness detection of the gravure printing roller;

[0022] S5: While detecting straightness and coaxiality, the ball will rotate when it encounters a surface defect. The surface defect is detected by the conductive signal between the first conductive plate and the second conductive plate.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This invention, through the setting of an adjustment mechanism, a first transmission mechanism, and a second transmission mechanism, drives a third electric lead screw, a first electric lead screw, and a second electric lead screw to adjust the detection position of the dial indicator and the degree of contact between the detection contact and the surface of the gravure printing roller. When coaxiality needs to be detected, the drive motor is started to rotate, causing the gravure printing roller on the support roller to rotate, enabling the dial indicator to perform coaxiality detection. After the coaxiality detection of one area is completed, the fourth electric lead screw is driven to adjust the moving frame to move to the next coaxiality detection area, and the gravure printing roller is rotated again, allowing the dial indicator to perform coaxiality detection in that area. This achieves coaxiality detection of different areas of the gravure printing roller. When straightness needs to be detected, the fourth electric lead screw is driven to move the moving frame from the vicinity of one mounting frame to the vicinity of another mounting frame, enabling the dial indicator to perform straightness detection of the gravure printing roller, thus improving the overall detection efficiency.

[0025] This invention, through the arrangement of the mounting component, allows the mounting component to move closer to the dial indicator when adjusting the contact degree between the ball and the surface of the gravure printing roller. This enables the second piston plate to squeeze the hydraulic oil inside the first chamber, allowing the hydraulic oil to pass through the proportional valve and evenly enter the four guide tubes. The hydraulic oil entering the guide tubes pushes the first piston plate inside the first slide groove towards the limiting ring, squeezing the first elastic element, increasing the contact degree between the extrusion rod and the slot, and increasing the resistance of the extrusion rod moving from the slot to the guide groove. Thus, by adjusting the contact degree between the ball and the surface of the gravure printing roller, the resistance of the extrusion rod moving from the slot to the guide groove is automatically adjusted, improving adaptability, preventing the ball from rotating directly when detecting coaxiality and straightness, and improving the accuracy of surface defect detection.

[0026] This invention utilizes a ball bearing configuration. When detecting the coaxiality of a gravure printing roller, the roller rotates. When the ball bearing encounters a surface defect, the two left and right pressure rods support it within their corresponding slots, while the two front and rear pressure rods move from their slots to their respective guide grooves. When detecting straightness, a dial indicator moves between two mounting brackets. Again, when the ball bearing encounters a surface defect, the two front and rear pressure rods support it within their corresponding slots, while the two left and right pressure rods move from their slots to their respective guide grooves. Each time a pressure rod moves from its slot to its guide groove, it compresses the pressure rod, causing it to move closer to the guide tube. This compresses the first elastic element, connecting the two sets of first and second conductive sheets, allowing the control equipment to receive a conductive signal. Therefore, while detecting straightness and coaxiality, the conductive signal can be used to determine if surface defects are affecting the detection, improving the accuracy of straightness detection. Furthermore, while detecting straightness and coaxiality, the conductive signal can also be used to detect surface defects, improving the accuracy and efficiency of surface defect detection. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the first transmission mechanism of the present invention;

[0030] Figure 3 This is a schematic diagram of the support mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the detection mechanism of the present invention;

[0032] Figure 5 This is a schematic diagram of the dial indicator and detection contact of the present invention;

[0033] Figure 6 This is a schematic diagram of the internal structure of the mounting component of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the isolation plate of the present invention;

[0035] Figure 8 This is a schematic diagram of the flow guide chamber of the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the rolling ball of the present invention;

[0037] Figure 10 This is a schematic diagram of the flow guide chamber and the rolling ball of the present invention;

[0038] Figure 11 For the present invention Figure 10 Enlarged view of the structure of section A in the middle.

[0039] In the diagram: 1. Mounting base plate; 2. Control equipment; 3. First transmission mechanism; 31. Guide rod; 32. Third electric lead screw; 4. Support mechanism; 41. Mounting frame; 42. Support component; 43. Mounting plate; 44. Support roller; 45. Driven wheel; 46. Placement groove; 47. Drive motor; 48. Drive wheel; 49. Synchronous belt; 410. First moving component; 5. Detection mechanism; 51. Moving frame; 52. Second moving component; 6. Detection contact; 61. Mounting component; 62. Receiving cavity; 63. Isolation plate; 64. First chamber; 65. Second chamber; 66. Flow guide chamber; 67. Limiting rod; 68. Through groove; 69. Limiting groove; 610. Rolling ball. 611. Guide tube; 612. Slide rod; 613. Guide groove; 614. Limiting ring; 615. Extrusion rod; 616. First slide groove; 617. First piston plate; 618. First elastic element; 619. First conductive sheet; 620. Second conductive sheet; 621. Guide groove; 622. Slot; 623. Drain tube; 624. Proportional valve; 625. Connecting tube; 626. Second piston plate; 627. Second elastic element; 628. Connecting element; 7. Second transmission mechanism; 71. Fourth electric lead screw; 8. Adjustment mechanism; 81. First electric lead screw; 82. First sliding element; 83. Second electric lead screw; 84. Second slider; 9. Dial indicator. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] In existing technologies, surface defects of gravure printing rollers are generally detected by visual inspection. However, visual inspection alone cannot directly detect the straightness and coaxiality of the gravure printing rollers, which affects the accuracy of the inspection.

[0043] Please see Figures 1 to 5 The present invention provides the following technical solution: a gravure printing roller detection device, including a mounting base plate 1 and a control device 2. The top of the mounting base plate 1 is connected to a support mechanism 4 via a first transmission mechanism 3. The device also includes a detection mechanism 5, which is connected to the top of the mounting base plate 1 via a second transmission mechanism 7. The detection mechanism 5 includes a movable frame 51, and a dial indicator 9 is connected to one side of the movable frame 51 via an adjustment mechanism 8. The dial indicator 9 is electrically connected to the control device 2, and the control device 2 can receive the detection data from the dial indicator 9.

[0044] The detection contact 6 is connected to the detection end of the dial indicator 9. The detection contact 6 includes a mounting part 61. The mounting part 61 has a receiving cavity 62 inside. An isolation plate 63 is fixedly connected to the inner wall of the receiving cavity 62. The isolation plate 63 divides the inside of the receiving cavity 62 into a first chamber 64 and a second chamber 65. A flow guide chamber 66 is fixedly connected inside the second chamber 65. A limit rod 67 is fixedly connected to the bottom of the flow guide chamber 66. A through groove 68 is opened at the bottom of the mounting part 61, and the position of the through groove 68 corresponds to that of the limit rod 67. A limit groove 69 is opened at the bottom of the limit rod 67. A ball 610 is provided between the limit groove 69 and the through groove 68. When the detection contact 6 contacts the surface of the gravure printing roller to perform coaxiality or straightness detection, the ball 610 will rotate.

[0045] The diameter of the through groove 68 is smaller than the diameter of the ball 610. The cooperation between the limiting groove 69 and the through groove 68 can restrict the rotation of the ball 610 between the limiting groove 69 and the through groove 68.

[0046] like Figure 4 As shown, the adjustment mechanism 8 includes a first electric lead screw 81 mounted on a movable frame 51. A first sliding member 82 is threadedly connected to the first electric lead screw 81. A second electric lead screw 83 is mounted on the first sliding member 82 and is perpendicular to the first electric lead screw 81. A second slider 84 is threadedly connected to the second electric lead screw 83. The second slider 84 is fixedly connected to a dial indicator 9. Driving the first electric lead screw 81 can adjust the up-and-down movement of the first sliding member 82 and the second electric lead screw 83. Driving the second electric lead screw 83 can adjust the back-and-forth movement of the second slider 84 and the dial indicator 9.

[0047] The first electric lead screw 81 is driven to adjust the up-and-down movement of the first sliding member 82 and the second electric lead screw 83. The purpose is to adjust the height of the second electric lead screw 83 so that the dial indicator 9 on the second electric lead screw 83 can be adjusted synchronously to adapt to the detection of gravure printing rollers of different diameters. This avoids the dial indicator 9 being in different detection positions when detecting gravure printing rollers of different diameters, and prevents the dial indicator 9 from being misaligned and unable to make contact with the gravure printing roller. Driving the second electric lead screw 83 can adjust the back-and-forth movement of the second slider 84 and the dial indicator 9, so as to adjust the gap between the dial indicator 9 and the gravure printing roller, and adjust the degree of contact between the detection contact 6 and the surface of the gravure printing roller.

[0048] The height of the second electric lead screw 83 and the dial indicator 9 should be set according to the different diameters of the gravure printing roller.

[0049] By setting the initial threshold for the dial indicator 9 using the control device 2, and adjusting the contact degree between the detection contact 6 and the surface of the gravure printing roller, when the dial indicator 9 reaches the initial threshold, the control device 2 will control the second electric lead screw 83 to stop working.

[0050] like Figure 3As shown, the support mechanism 4 includes two mounting brackets 41. Each mounting bracket 41 has two symmetrically arranged support members 42 fixedly connected to its top. A mounting plate 43 is fixedly connected between the two support members 42 on the same mounting bracket 41. Two symmetrically arranged support rollers 44 are rotatably connected to the opposite side of the two mounting plates 43. The two support rollers 44 on one of the mounting brackets 41 are connected to driven wheels 45. The bottom of the mounting bracket 41 is provided with a placement groove 46. A drive motor 47 is provided inside the placement groove 46. A drive wheel 48 is provided on the shaft of the drive motor 47. The drive wheel 48 is connected to the two driven wheels 45 via a synchronous belt 49.

[0051] like Figure 1 As shown, the two ends of the gravure printing roller to be tested are placed between the two support rollers 44 on the two mounting plates 43 for support. At this time, the drive motor 47 rotates and drives the two driven rollers 45 to rotate synchronously through the drive wheel 48 and the synchronous belt 49, which can drive the gravure printing roller on the support roller 44 to rotate.

[0052] like Figure 2 As shown, the first transmission mechanism 3 includes a guide rod 31 and a third electric lead screw 32 disposed on the top of the mounting base plate 1. Two first moving parts 410 are fixedly connected to the bottom of one of the mounting brackets 41. One of the first moving parts 410 is slidably connected to the guide rod 31, and the other first moving part 410 is threadedly connected to the third electric lead screw 32. Driving the third electric lead screw 32 can adjust the distance between the two mounting brackets 41. The second transmission mechanism 7 includes a fourth electric lead screw 71 disposed on the top of the mounting base plate 1. Two second moving parts 52 are fixedly connected to the bottom of the moving bracket 51. One of the second moving parts 52 is slidably connected to the guide rod 31, and the other second moving part 52 is threadedly connected to the fourth electric lead screw 71. Driving the fourth electric lead screw 71 can make the moving bracket 51 move left and right between the two mounting brackets 41.

[0053] Two mounting brackets 41 are provided, one of which is fixedly mounted to the top of the mounting base plate 1, and the other can be moved by the drive of the third electric screw 32. The purpose is to adjust the distance between the two mounting brackets 41 by driving the third electric screw 32 to accommodate gravure printing rollers of different lengths.

[0054] The first electric lead screw 81, the second electric lead screw 83, the drive motor 47, the third electric lead screw 32, and the fourth electric lead screw 71 are all electrically connected to the control device 2. The control device 2 can control the start, stop, and forward / reverse rotation of the first electric lead screw 81, the second electric lead screw 83, the third electric lead screw 32, and the fourth electric lead screw 71, and can control the start and stop of the drive motor 47.

[0055] In actual use, first, the distance between the two mounting brackets 41 is adjusted by driving the third electric lead screw 32 to adapt to the length of the gravure printing roller. Then, the two ends of the gravure printing roller to be tested are placed between the two support rollers 44 on the two mounting plates 43 for support. Subsequently, the height of the second electric lead screw 83 is adjusted by driving the first electric lead screw 81 until the dial indicator 9 reaches the appropriate height. Then, the dial indicator 9 is moved back and forth by driving the second electric lead screw 83 to adjust the contact degree between the detection contact 6 and the surface of the gravure printing roller. During this process, when the dial indicator 9 reaches the initial threshold, the second electric lead screw 83 will stop rotating. Then, the drive motor 47 will rotate, causing the gravure printing roller on the support roller 44 to rotate, enabling the dial indicator 9 to perform coaxiality detection. After the coaxiality detection of one area is completed, the fourth electric lead screw 71 is driven to adjust the moving frame 51 to move between the two mounting frames 41, moving it to the next coaxiality detection area. The gravure printing roller is rotated again, so that the dial indicator 9 can perform coaxiality detection of that area, thereby realizing the coaxiality detection of different areas of the gravure printing roller.

[0056] The detection area for the coaxiality of the gravure printing roller should be set according to the length of the gravure printing roller.

[0057] It should be noted that the two ends of the gravure printing roller to be tested are placed between the two support rollers 44 on the two mounting plates 43 for support. The height of the second electric lead screw 83 is adjusted so that the dial indicator 9 reaches a suitable height. The contact degree between the detection contact 6 and the surface of the gravure printing roller is adjusted so that the dial indicator 9 reaches the initial threshold. Then, the fourth electric lead screw 71 is driven to move the moving frame 51 from the vicinity of one mounting frame 41 to the vicinity of the other mounting frame 41, so that the dial indicator 9 can perform straightness detection of the gravure printing roller.

[0058] When checking the straightness of the gravure printing roller, first move the moving frame 51 to the vicinity of one of the mounting frames 41, and then adjust the position of the dial indicator 9.

[0059] In summary, this invention, through the adjustment mechanism 8, the first transmission mechanism 3, and the second transmission mechanism 7, drives the third electric lead screw 32, the first electric lead screw 81, and the second electric lead screw 83 to adjust the detection position of the dial indicator 9 and the contact degree between the detection contact 6 and the surface of the gravure printing roller. When coaxiality needs to be detected, the drive motor 47 is started to rotate, driving the gravure printing roller on the support roller 44 to rotate, enabling the dial indicator 9 to perform coaxiality detection. After the coaxiality detection of one area is completed, the fourth electric lead screw 71 is driven to adjust the moving frame 51 to move to the next coaxiality detection area, and the gravure printing roller is rotated again, so that the dial indicator 9 can perform coaxiality detection in that area. This achieves coaxiality detection of different areas of the gravure printing roller. When straightness needs to be detected, the fourth electric lead screw 71 is driven to move the moving frame 51 from the vicinity of one mounting frame 41 to the vicinity of another mounting frame 41, enabling the dial indicator 9 to perform straightness detection of the gravure printing roller, thus improving the overall detection efficiency.

[0060] Example 2

[0061] Based on the above embodiments, it is impossible to detect small defects on the surface of the gravure printing roller by visual observation. Small defects will cause the surface of the gravure printing roller to be uneven. When detecting the straightness or coaxiality of the gravure printing roller surface, these small defects will affect the accuracy of the detection of the straightness and coaxiality of the gravure printing roller, and it is impossible to determine whether the straightness and coaxiality are affected by surface defects.

[0062] Please see Figures 6 to 11 The bottom of the flow chamber 66 is fixedly connected to four flow pipes 611 that are circumferentially distributed. The limiting rod 67 is located inside the four flow pipes 611. The outer wall of each flow pipe 611 is fixedly connected to a horizontally arranged slide rod 612. Each slide rod 612 has a flow groove 613 that communicates with the corresponding flow pipe 611. The inside of each flow groove 613 is slidably connected to a limiting ring 614. The inner side of each limiting ring 614 is fixedly connected to a squeezing rod 615. The end of each squeezing rod 615 near the limiting rod 67 passes through the corresponding slide rod 612. The outer wall of each limiting rod 67 is slidably connected to the corresponding slide rod 612. The inner wall of each flow groove 613 has a first sliding groove 616. The inside of each first sliding groove 616 is slidably connected to a first piston plate 617. Each first piston plate 617 is connected to the corresponding limiting ring 614 by a first elastic element 618.

[0063] Under normal conditions, when the ball 610 is not in contact with the gravure printing roller, the first piston plate 617 is located inside the first slide groove 616 on the side near the guide tube 611. When hydraulic oil enters the guide tube 611, the hydraulic oil will push the first piston plate 617 to move towards the limit ring 614 inside the first slide groove 616, squeezing the first elastic element 618, which can increase the contact degree between the extrusion rod 615 and the slot 622, and increase the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621.

[0064] like Figure 11 As shown, each guide channel 613 has a first conductive sheet 619 on its inner wall, and each guide channel 613 has a second conductive sheet 620 on its outer wall corresponding to the position of the first conductive sheet 619. Each first conductive sheet 619 and the second conductive sheet 620 are electrically connected to the control device 2. When the first conductive sheet 619 and the corresponding second conductive sheet 620 are connected and conductive, the control device 2 can detect the conductive signal of the corresponding first conductive sheet 619 and the second conductive sheet 620.

[0065] like Figure 9 As shown, the outer wall of the ball 610 has two guide grooves 621 arranged vertically and alternately. Each guide groove 621 has two symmetrically arranged slots 622 inside. The two slots 622 inside one guide groove 621 are perpendicular to the two slots 622 inside the other guide groove 621, and the four slots 622 are on the same plane. The connection between each slot 622 and the corresponding guide groove 621 is wedge-shaped. Every two symmetrically arranged slide rods 612 can slide inside the same guide groove 621. The four extrusion rods 615 can correspond one-to-one with the positions of the four slots 622.

[0066] When the slide bar 612 slides inside the guide groove 621, the pressing bar 615 can intermittently enter the guide groove 621 from inside the slot 622.

[0067] The connection between the slot 622 and the corresponding guide groove 621 is wedge-shaped to facilitate the movement of the pressing rod 615 from the slot 622 into the guide groove 621.

[0068] like Figure 11 As shown, under normal conditions, i.e., when the ball 610 is not being detected, all four extrusion rods 615 are inside their corresponding slots 622. At this time, under the action of the first elastic element 618, the extrusion rods 615 are in close contact with the inner wall of the slot 622, and the first conductive piece 619 and the second conductive piece 620 are misaligned, preventing them from conducting electricity. Figure 10As shown, when the coaxiality of the gravure printing roller is tested, the gravure printing roller rotates. When the ball 610 encounters a surface defect, the two left and right pressure rods 615 can support the ball 610 inside the corresponding slots 622, while the two front and rear pressure rods 615 can move from the corresponding slots 622 to the corresponding guide grooves 621. During the rotation of the ball 610, each time the two front and rear pressure rods 615 move from the slots 622 to the guide grooves 621, they will press the corresponding pressure rod 615 towards the direction of the guide tube 611, which can press the first elastic element 618, and make the two sets of first conductive sheets 619 and second conductive sheets 620 connected and conductive, so that the control device 2 can receive the conductive signal. Thus, while testing the coaxiality, the conductive signal can be used to determine whether it is affected by the surface defect. When testing the straightness, the dial indicator 9 moves between the two mounting brackets 41, and the ball 610... When a surface defect is encountered, the two front and rear extrusion rods 615 can support the ball 610 in the corresponding slots 622, while the two left and right extrusion rods 615 can move from the corresponding slots 622 to the corresponding guide grooves 621. During the rotation of the ball 610, each time the two left and right extrusion rods 615 move from the slots 622 to the guide grooves 621, they will squeeze the corresponding extrusion rod 615 towards the direction of the guide tube 611, which can squeeze the first elastic element 618, and make the two sets of first conductive sheets 619 and second conductive sheets 620 connected to conduct electricity, so that the control device 2 can receive the conductive signal. Thus, while detecting straightness, the conductive signal can be used to determine whether it is affected by the surface defect, improving the accuracy of straightness detection. Moreover, while detecting straightness and coaxiality, the conductive signal can also be used to detect surface defects, improving the accuracy and efficiency of surface defect detection.

[0069] like Figure 6 and Figure 7 As shown, the interior of the isolation plate 63 is provided with a drainage pipe 623 that communicates with the first chamber 64. The interior of the flow guide chamber 66 is provided with a proportional valve 624 that communicates with the drainage pipe 623. The proportional valve 624 is connected to four flow guide pipes 611 via a connecting pipe 625. The interior of the first chamber 64 is slidably connected with a second piston plate 626. The bottom of the second piston plate 626 is connected to the isolation plate 63 with a second elastic element 627. The top of the second piston plate 626 is fixedly connected with a connector 628 that passes through the mounting component 61. The other end of the connector 628 is fixedly connected to the detection end of the dial gauge 9. The outer wall of the connector 628 is slidably connected to the mounting component 61.

[0070] The first chamber 64 is filled with hydraulic oil. The second piston plate 626 can squeeze the hydraulic oil in the first chamber 64, allowing the hydraulic oil to pass through the guide pipe 623 and enter the proportional valve 624. The hydraulic oil entering the proportional valve 624 can evenly enter the four guide pipes 611.

[0071] In practical use, defects on the surface of the gravure printing roller will cause the surface to be uneven, increasing the surface roughness and the friction between the ball 610 and the surface of the printing roller. When moving the printing roller or the detection contact 6, upon encountering a surface defect, the friction can overcome the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621, causing the ball 610 to rotate. Considering the different degrees of contact between the ball 610 and the surface of the printing roller, i.e., the dial indicator 9... With different initial thresholds, since friction is proportional to pressure, when the initial threshold increases, i.e. when the degree of extrusion increases, the friction between the ball 610 and the surface of the gravure printing roller will also increase. If coaxiality or straightness is detected at this time, when moving the gravure printing roller or the detection contact 6, the increased friction can overcome the resistance of the extrusion rod 615 moving from the inside of the slot 622 to the inside of the guide groove 621, causing the ball 610 to rotate directly, i.e., it will rotate even when there are no surface defects, which will affect the accuracy of surface defect detection.

[0072] During the process of adjusting the contact degree between the ball 610 and the surface of the gravure printing roller, when the ball 610 contacts the surface of the gravure printing roller, the mounting part 61 will move towards the dial indicator 9, which allows the second piston plate 626 to squeeze the hydraulic oil inside the first chamber 64, and allows the hydraulic oil to pass through the proportional valve 624 and enter the four guide pipes 611 evenly. The hydraulic oil entering the guide pipes 611 can push the first piston plate 617 to move towards the limiting ring 614 inside the first slide groove 616, squeezing the first elastic element 618, increasing the contact degree between the extrusion rod 615 and the slot 622, and increasing the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621. Thus, the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621 can be adjusted by the contact degree between the ball 610 and the surface of the gravure printing roller, thereby improving the adaptability.

[0073] As the mounting component 61 moves toward the dial indicator 9, the second elastic element 627 is compressed. The reaction force of the second elastic element 627 provides a detection pressure to the dial indicator 9, enabling the dial indicator 9 to work. The dial indicator 9 is an electronic dial indicator, which is existing technology and will not be described in detail.

[0074] In summary, by setting the mounting part 61, when adjusting the contact degree between the ball 610 and the surface of the gravure printing roller, the mounting part 61 will move towards the dial indicator 9, which allows the second piston plate 626 to squeeze the hydraulic oil inside the first chamber 64. This allows the hydraulic oil to pass through the proportional valve 624 and enter the four guide pipes 611 evenly. The hydraulic oil entering the guide pipes 611 can push the first piston plate 617 to move towards the limiting ring 614 inside the first slide groove 616, squeezing the first elastic element 618, increasing the contact degree between the extrusion rod 615 and the slot 622, and increasing the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621. Thus, by adjusting the contact degree between the ball 610 and the surface of the gravure printing roller, the resistance of the extrusion rod 615 moving from the slot 622 to the guide groove 621 can be adjusted, improving adaptability, preventing the ball 610 from rotating directly when detecting coaxiality and straightness, and improving the accuracy of surface defect detection.

[0075] Example 3

[0076] A method for detecting gravure printing rollers includes the following steps:

[0077] S1: First, adjust the distance between the two mounting brackets 41 by driving the third electric lead screw 32 to match the length of the gravure printing roller. Then, place the two ends of the gravure printing roller to be tested between the two support rollers 44 on the two mounting plates 43 for support.

[0078] S2: By driving the first electric lead screw 81 and the second electric lead screw 83, the detection position of the dial indicator 9 and the degree of contact between the detection contact 6 and the surface of the gravure printing roller are adjusted.

[0079] S3: Start the drive motor 47 to rotate, which drives the gravure printing plate roller on the support roller 44 to rotate, so that the dial indicator 9 can perform coaxiality detection.

[0080] S4: Drive the fourth electric lead screw 71 to move the moving frame 51 from the vicinity of one of the mounting frames 41 to the vicinity of the other mounting frame 41, so that the dial indicator 9 can perform straightness detection of the gravure printing roller.

[0081] S5: While detecting straightness and coaxiality, the ball 610 will rotate when it encounters a surface defect, and the surface defect can be detected through the conductive signals of the first conductive sheet 619 and the second conductive sheet 620.

[0082] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gravure roll detection device, comprising a mounting base plate (1) and a control device (2), the top of the mounting base plate (1) is connected with a supporting mechanism (4) through a first transmission mechanism (3), characterized in that, Also include: Detection mechanism (5), the detection mechanism (5) is connected with the top of the installation bottom plate (1) through the second transmission mechanism (7), the detection mechanism (5) includes a moving frame (51), one side of the moving frame (51) is connected with a dial gauge (9) through an adjusting mechanism (8), the dial gauge (9) is electrically connected with a control device (2), and the control device (2) can receive detection data of the dial gauge (9); Detection contact (6), the detection contact (6) is connected with the detection end of the dial gauge (9), the detection contact (6) includes a mounting part (61), the inside of the mounting part (61) is provided with a containing cavity (62), the inner wall of the containing cavity (62) is fixedly connected with a partition plate (63), the partition plate (63) divides the inside of the containing cavity (62) into a first cavity (64) and a second cavity (65) from top to bottom, the inside of the second cavity (65) is fixedly connected with a flow guide bin (66), the bottom of the flow guide bin (66) is fixedly connected with a limiting rod (67), the bottom of the mounting part (61) is provided with a through slot (68), the through slot (68) corresponds to the position of the limiting rod (67), and the bottom of the limiting rod (67) is provided with a limiting slot (69), and the limiting slot (69) and the through slot (68) are provided with a rolling ball (610); The bottom of the flow guide bin (66) is fixedly connected with four flow guide pipes (611) which are circumferentially equidistantly distributed, the outer wall of each flow guide pipe (611) is fixedly connected with a horizontally arranged sliding rod (612), the inside of each sliding rod (612) is provided with a flow guide groove (613) which is communicated with the corresponding flow guide pipe (611), the inside of each flow guide groove (613) is slidably connected with a limiting ring (614), the inner side of each limiting ring (614) is fixedly connected with an extrusion rod (615), one end of each extrusion rod (615) close to the limiting rod (67) penetrates through the corresponding sliding rod (612), the outer wall of each limiting rod (67) is slidably connected with the corresponding sliding rod (612), the inner wall of each flow guide groove (613) is provided with a first sliding groove (616), the inside of each first sliding groove (616) is slidably connected with a first piston plate (617), and each first piston plate (617) and the corresponding limiting ring (614) are connected with a first elastic element (618); Each flow guide groove (613) is provided with a first conductive sheet (619), the outer wall of the limiting ring (614) in each flow guide groove (613) is provided with a second conductive sheet (620) corresponding to the position of the first conductive sheet (619), each first conductive sheet (619) and the second conductive sheet (620) are electrically connected with the control device (2), when the first conductive sheet (619) and the corresponding second conductive sheet (620) are in communication and conductive, the control device (2) can detect the conductive signal of the corresponding first conductive sheet (619) and second conductive sheet (620). The outer wall of the rolling ball (610) is provided with two vertically staggered guide grooves (621), two symmetrically arranged clamping grooves (622) are arranged in each guide groove (621), the two clamping grooves (622) in one guide groove (621) are vertically arranged with the two clamping grooves (622) in the other guide groove (621), and the four clamping grooves (622) are in the same plane, each clamping groove (622) is wedge-shaped at the connection with the corresponding guide groove (621), and each two symmetrically arranged sliding rods (612) can slide in the same guide groove (621), and the four extrusion rods (615) correspond one-to-one with the positions of the four clamping grooves (622).

2. The gravure roll detection apparatus according to claim 1, characterized by: The inside of the isolation plate (63) is provided with a drainage tube (623) communicating with the first chamber (64), the guide bin (66) is provided with a proportional valve (624) communicating with the drainage tube (623), the proportional valve (624) is connected with four guide tubes (611) through a connecting pipe (625), the inside of the first chamber (64) is slidably connected with a second piston plate (626), the bottom of the second piston plate (626) is connected with the isolation plate (63) through a second elastic element (627), the top of the second piston plate (626) is fixedly connected with a connecting piece (628) penetrating the mounting piece (61), the other end of the connecting piece (628) is fixedly connected with the detection end of the dial gauge (9), and the outer wall of the connecting piece (628) is slidably connected with the mounting piece (61).

3. The gravure roll detection apparatus according to claim 2, characterized in that: The adjusting mechanism (8) comprises a first electric screw rod (81) arranged on the moving frame (51), a first sliding piece (82) is threadedly connected on the first electric screw rod (81), a second electric screw rod (83) perpendicular to the first electric screw rod (81) is arranged on the first sliding piece (82), a second sliding block (84) is threadedly connected on the second electric screw rod (83), the second sliding block (84) is fixedly connected with the dial gauge (9), driving the first electric screw rod (81) can adjust the up-down movement of the first sliding piece (82) and the second electric screw rod (83), and driving the second electric screw rod (83) can adjust the front-back movement of the second sliding block (84) and the dial gauge (9).

4. The gravure roll detection apparatus according to claim 3, characterized by: The support mechanism (4) includes two mounting racks (41), the top of each mounting rack (41) is fixedly connected with two symmetrical support pieces (42), two support pieces (42) on the same mounting rack (41) are fixedly connected with a mounting plate (43), and the opposite sides of the two mounting plates (43) are rotatably connected with two symmetrical support rollers (44); one of the two support rollers (44) on one of the mounting racks (41) is connected with a driven wheel (45), and the bottom of the mounting rack (41) is provided with a placing groove (46); the inside of the placing groove (46) is provided with a driving motor (47), the output shaft of the driving motor (47) is provided with a driving wheel (48), and the driving wheel (48) is connected with the two driven wheels (45) through a synchronous belt (49).

5. The gravure roll detection apparatus according to claim 4, characterized by: The first transmission mechanism (3) includes a guide rod (31) and a third electric lead screw (32) arranged on the top of the mounting bottom plate (1), the bottom of one of the mounting racks (41) is fixedly connected with two first moving pieces (410), one of the first moving pieces (410) is slidably connected with the guide rod (31), and the other first moving piece (410) is threadedly connected with the third electric lead screw (32); the third electric lead screw (32) is driven to adjust the distance between the two mounting racks (41), the second transmission mechanism (7) includes a fourth electric lead screw (71) arranged on the top of the mounting bottom plate (1), and the bottom of the moving frame (51) is fixedly connected with two second moving pieces (52); one of the second moving pieces (52) is slidably connected with the guide rod (31), and the other second moving piece (52) is threadedly connected with the fourth electric lead screw (71); the fourth electric lead screw (71) is driven to move the moving frame (51) left and right between the two mounting racks (41).

6. The gravure roll detection apparatus according to claim 5, characterized by: The first chamber (64) is filled with hydraulic oil, the second piston plate (626) can extrude the hydraulic oil in the first chamber (64), so that the hydraulic oil enters the inside of the proportional valve (624) through the drainage pipe (623), and the hydraulic oil entering the inside of the proportional valve (624) can enter the inside of the four flow guide pipes (611) uniformly.

7. A method of detecting a gravure roll using the gravure roll detection apparatus according to claim 6, wherein The method comprises the following steps: S1: first, adjust the distance between the two mounting racks (41) by driving the third electric lead screw (32), and adapt to the length of the gravure roller, then place the two ends of the gravure roller to be detected between the two support rollers (44) on the two mounting plates (43) for support; S2: adjust the detection position of the dial gauge (9) and the contact degree of the detection contact (6) and the surface of the gravure roller by driving the first electric lead screw (81) and the second electric lead screw (83); S3: start the driving motor (47) to rotate, drive the gravure roller on the support roller (44) to rotate, and make the dial gauge (9) detect the coaxiality. S4: driving the fourth electric screw rod (71) to move the moving frame (51) from the vicinity of one of the mounting frames (41) to the vicinity of another mounting frame (41), so that the dial gauge (9) can detect the straightness of the gravure roller; S5: while detecting the straightness and coaxiality, the rolling ball (610) rotates when encountering surface defects, and the detection of the surface defects is realized through the conductive signals of the first conductive sheet (619) and the second conductive sheet (620).

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