Printing roller body surface defect detection device

Abstract

The utility model relates to the technical field of printing roller body detection, and discloses a printing roller body surface defect detection device which comprises a base, a detection table is fixedly connected to the top of the base, a fixing mechanism is arranged on the top of the detection table, a detection mechanism is arranged on the right side of the top of the detection table, and the fixing mechanism comprises a first servo motor. The first servo motor is fixedly connected to the front side of the detection table, and the rear side of the first servo motor is fixedly connected with a first two-way threaded rod. During use, through the arranged fixing mechanism, when the surface defects of the printing roller body need to be detected, firstly, the roller body and the rotating shaft are located on the inner side of the bearing frame through external equipment; and meanwhile, a rotating shaft in the roller body is located in the middle of the inner sides of the two sets of clamping plates, according to the size of the roller body, a first servo motor drives a first two-way threaded rod, the two sets of bearing frames can be synchronously driven to move in the face-to-face or back-to-back mode, and printing roller barrels of different lengths can be conveniently adapted.

Description

Technical Field

[0001] This utility model relates to the field of printing roller body inspection technology, specifically a printing roller body surface defect detection device. Background Technology

[0002] In the modern printing industry, offset printing, with its unique advantages, is widely used in the production of various printed materials. The printing roller, as a core component, undertakes crucial tasks such as ink coating and precise image transfer; its working condition directly affects printing quality and efficiency. With the continuous development of printing technology, the performance and precision requirements for printing rollers are becoming increasingly stringent. In actual production, the printing roller body is subjected to complex working conditions for extended periods. It is affected by the adhesion of ink, paper, and other materials, as well as mechanical wear and chemical corrosion, making its surface prone to various defects such as ink residue, wear marks, cracks, and aging. Therefore, timely and accurate detection of surface defects on the printing roller body is crucial for ensuring the stability and efficiency of printing production.

[0003] According to the patent application published on the Internet, a printing roller surface defect detection device (authorization announcement number: CN118483242A) is described as including a "cleaning mechanism, a visual inspection mechanism, etc., to perform the detection work.

[0004] Regarding the above description, the applicant believes the following issues exist:

[0005] This printing roller surface defect detection device uses a cleaning mechanism and a visual inspection mechanism to perform the inspection work. During the inspection process, because the size of the rotating shaft inside different rollers is different, the rotating shaft needs to be adjusted according to the different rotating shaft sizes when fixing it during the inspection. This device cannot fix rollers of different sizes during use, which affects the stability during the inspection process and makes it inconvenient to drive the roller to rotate. Therefore, this device needs to be improved. Utility Model Content

[0006] The purpose of this invention is to provide a device for detecting surface defects of printing rollers, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a printing roller body surface defect detection device, including a base, a detection platform fixedly connected to the top of the base, a fixing mechanism provided on the top of the detection platform, and a detection mechanism provided on the right side of the top of the detection platform;

[0008] The fixing mechanism includes a first servo motor, which is fixedly connected to the front of the testing table. A first bidirectional threaded rod is fixedly connected to the rear of the first servo motor. A load-bearing frame is threadedly connected to the outer side of the first bidirectional threaded rod. A support frame is fixedly connected to the front of the load-bearing frame. A second servo motor is fixedly connected to the front of the support frame. A rotating rod is fixedly connected to the rear of the second servo motor. A rotating seat is fixedly connected to the rear of the rotating rod. The rotating seat is rotatably connected to the inside of the load-bearing frame. A fixing frame is fixedly connected to the rear of the rotating seat. A second bidirectional threaded rod is rotatably connected inside the fixing frame. A knob is fixedly connected to the top of the second bidirectional threaded rod. A movable frame is threadedly connected to the outer side of the second bidirectional threaded rod. The movable frame is slidably connected to the inside of the fixing frame. A clamping plate is fixedly connected to the rear of the movable frame. A rotating shaft is provided inside the clamping plate. A roller is fixedly connected to the outer side of the rotating shaft.

[0009] Preferably, the rear side of the first bidirectional threaded rod is rotatably connected to the testing platform, the inner side of the load-bearing frame is slidably connected to the inside of the testing platform, and the rotating rod is rotatably connected to the inside of the support frame, so as to facilitate the adjustment of the spacing between the load-bearing frames under the action of the first bidirectional threaded rod.

[0010] Preferably, the inner side of the clamping plate is in contact with the outer periphery of the rotating shaft. Two sets of the movable frame and clamping plate are provided, and the two sets of the movable frame and clamping plate are symmetrically distributed around the second bidirectional threaded rod. The two sets of clamping plates are in a sliding state with each other, which facilitates the fixing of the rotating shaft inside the roller body of different sizes under the action of the clamping plate.

[0011] Preferably, the load-bearing frame, rotating seat, fixed frame, second bidirectional threaded rod, knob, movable frame and clamping plate are provided in two sets. The two sets of the load-bearing frame, rotating seat, fixed frame, second bidirectional threaded rod, knob, movable frame and clamping plate are symmetrically distributed on the front and rear sides of the roller body, so that roller bodies of different sizes can be fixed by setting two sets.

[0012] Preferably, the load-bearing frame has a limiting groove inside, and the rotating seat is rotatably connected to the limiting groove, so as to ensure the stability of the rotating seat under the action of the limiting groove.

[0013] Preferably, the testing mechanism includes a load-bearing platform, which is fixedly connected to the top right side of the testing table. A cylinder is fixedly connected to the bottom of the load-bearing platform, a connecting frame is fixedly connected to the top of the cylinder, a rectangular frame is fixedly connected to the inner side of the connecting frame, a third servo motor is fixedly connected to the front side of the rectangular frame, a one-way threaded rod is fixedly connected to the rear side of the third servo motor, a mounting base is threadedly connected to the outer side of the one-way threaded rod, an industrial camera is fixedly connected to the top of the mounting base, and supplementary lights are fixedly connected to the front and rear sides of the industrial camera.

[0014] Preferably, the connecting frame is slidably connected to the inside of the support platform, and the rear side of the one-way threaded rod is rotatably connected to the rectangular frame, so as to facilitate the industrial camera to move back and forth under the action of the one-way threaded rod.

[0015] Compared with the prior art, the present invention provides a device for detecting surface defects of printing rollers, which has the following advantages:

[0016] 1. This printing roller surface defect detection device, through its fixed mechanism, allows for the detection of surface defects on the printing roller. First, external equipment positions the roller and rotating shaft inside the support frame, while the rotating shaft inside the roller is positioned at the midpoint of the two sets of clamping plates. Depending on the roller's size, a first servo motor drives a first bidirectional threaded rod, simultaneously moving the two sets of support frames towards or away from each other, facilitating adaptation to printing rollers of different lengths. When the two sets of clamping plates are outside the rotating shaft, the distance between them can be manually adjusted to precisely clamp rotating shafts of different diameters, ensuring the roller remains stable and does not wobble during inspection. This significantly improves the device's applicability to different specifications of printing rollers and its stability. Furthermore, the two sets of clamping plates slide relative to each other, not only fixing rotating shafts of different sizes but also ensuring stability. After fixing, the second servo motor, in conjunction with the rotating rod and rotating seat, enables the fixed frame to rotate the roller flexibly, ensuring comprehensive inspection during the process.

[0017] 2. This printing roller surface defect detection device, through its detection mechanism, allows the cylinder to drive the connecting frame to move up and down when the rotating shaft inside the roller is fixed under the action of the load-bearing frame and clamping plate. This enables the industrial camera to adjust its detection height according to the roller size, ensuring that the industrial camera and the center of the roller are parallel to each other. The third servo motor drives the unidirectional threaded rod to rotate, thereby controlling the mounting base and the industrial camera to move back and forth along the roller, achieving comprehensive scanning and detection of the roller surface. The supplementary lights on both sides of the industrial camera provide uniform and stable illumination, effectively avoiding blind spots caused by insufficient or uneven light, ensuring clear and accurate detection images, and improving detection accuracy and the reliability of defect identification. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the fixed mechanism structure;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the load-bearing frame;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the roller body;

[0024] Figure 6 This is a schematic diagram of the testing mechanism.

[0025] In the diagram: 1. Base; 2. Testing table; 3. Fixing mechanism; 4. Testing mechanism; 31. First servo motor; 32. First bidirectional threaded rod; 33. Load-bearing frame; 34. Second servo motor; 35. Support frame; 36. Roller; 37. Rotating seat; 38. Fixing frame; 39. Rotating rod; 391. Second bidirectional threaded rod; 392. Rotating shaft; 393. Knob; 394. Moving frame; 395. Clamping plate; 41. Load-bearing platform; 42. Cylinder; 43. Connecting frame; 44. Third servo motor; 45. Rectangular frame; 46. Unidirectional threaded rod; 47. Mounting seat; 48. Fill light; 49. Industrial camera. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] This utility model provides the following technical solution:

[0029] Example 1

[0030] Please see Figure 1-6The present invention provides a technical solution: including a base 1, a testing platform 2 fixedly connected to the top of the base 1, a fixing mechanism 3 provided on the top of the testing platform 2, and a testing mechanism 4 provided on the right side of the top of the testing platform 2;

[0031] The fixing mechanism 3 includes a first servo motor 31, which is fixedly connected to the front of the testing table 2. A first bidirectional threaded rod 32 is fixedly connected to the rear of the first servo motor 31. A load-bearing frame 33 is threadedly connected to the outer side of the first bidirectional threaded rod 32. A support frame 35 is fixedly connected to the front of the load-bearing frame 33. A second servo motor 34 is fixedly connected to the front of the support frame 35. A rotating rod 39 is fixedly connected to the rear of the second servo motor 34. A rotating seat 37 is fixedly connected to the rear of the rotating rod 39. The rotating seat 37 rotates. Connected inside the load-bearing frame 33, a fixed frame 38 is fixedly connected to the rear side of the rotating seat 37. A second bidirectional threaded rod 391 is rotatably connected inside the fixed frame 38. A knob 393 is fixedly connected to the top of the second bidirectional threaded rod 391. A movable frame 394 is threadedly connected to the outer side of the second bidirectional threaded rod 391. The movable frame 394 is slidably connected inside the fixed frame 38. A clamping plate 395 is fixedly connected to the rear side of the movable frame 394. A rotating shaft 392 is provided inside the clamping plate 395. A roller body 36 is fixedly connected to the outer side of the rotating shaft 392.

[0032] The first bidirectional threaded rod 32 is rotatably connected to the inside of the testing table 2 on its rear side, and the inner side of the load-bearing frame 33 is slidably connected to the inside of the testing table 2. The rotating rod 39 is rotatably connected to the inside of the support frame 35, so as to facilitate the adjustment of the spacing between the load-bearing frames 33 under the action of the first bidirectional threaded rod 32.

[0033] The inner side of the clamping plate 395 is in contact with the outer side of the rotating shaft 392. There are two sets of moving frames 394 and clamping plates 395. The two sets of moving frames 394 and clamping plates 395 are symmetrically distributed around the second bidirectional threaded rod 391, and the two sets of clamping plates 395 are in a sliding state with each other, which makes it easy to fix the rotating shaft 392 inside the roller body 36 of different sizes under the action of the clamping plates 395.

[0034] Two sets of load-bearing frame 33, rotating seat 37, fixed frame 38, second bidirectional threaded rod 391, knob 393, movable frame 394 and clamping plate 395 are provided. The two sets of load-bearing frame 33, rotating seat 37, fixed frame 38, second bidirectional threaded rod 391, knob 393, movable frame 394 and clamping plate 395 are symmetrically distributed on the front and rear sides of the roller body 36. By setting two sets, roller bodies 36 of different sizes can be fixed. The load-bearing frame 33 has a limit groove inside, and the rotating seat 37 is rotatably connected in the limit groove, which helps to ensure the stability of the rotating seat 37 under the action of the limit groove.

[0035] Example 2

[0036] Please see Figure 1-6Furthermore, based on Embodiment 1, the detection mechanism 4 includes a support platform 41, which is fixedly connected to the top right side of the detection platform 2. A cylinder 42 is fixedly connected to the bottom of the support platform 41, and a connecting frame 43 is fixedly connected to the top of the cylinder 42. A rectangular frame 45 is fixedly connected to the inner side of the connecting frame 43. A third servo motor 44 is fixedly connected to the front side of the rectangular frame 45. A one-way threaded rod 46 is fixedly connected to the rear side of the third servo motor 44. A mounting base 47 is threadedly connected to the outer side of the one-way threaded rod 46. An industrial camera 49 is fixedly connected to the top of the mounting base 47. Fill lights 48 are fixedly connected to the front and rear sides of the industrial camera 49. The connecting frame 43 is slidably connected to the inside of the support platform 41, and the rear side of the one-way threaded rod 46 is rotatably connected to the rectangular frame 45, which facilitates the movement of the industrial camera 49 back and forth under the action of the one-way threaded rod 46.

[0037] In actual operation, when this device is used, the printing roller body surface defect detection device needs to clean the residual impurities and oil stains on the surface of the printing roller body when it is necessary to detect the surface defects of the printing roller body. This is done by the staff using external cleaning equipment to ensure the accuracy of subsequent detection. After cleaning, the roller body 36 and the rotating shaft 392 are placed inside the load-bearing frame 33 by the external equipment. At the same time, the rotating shaft 392 inside the roller body 36 is placed in the middle of the inner side of the two sets of clamping plates 395. According to the size of the roller body 36, the first bidirectional threaded rod 32 is driven by the first servo motor 31, which can synchronously drive the two sets of load-bearing frames 33 to move towards or away from each other, which is convenient to adapt to printing roller bodies of different lengths.

[0038] When the two sets of clamping plates 395 are located around the rotating shaft 392, rotating the knob 393 causes the second bidirectional threaded rod 391 to move the moving frame 394 and the clamping plates 395, so that the inner side of the clamping plates 395 comes into contact with the outer side of the rotating shaft 392, thus fixing it. The two sets of clamping plates 395 are in a sliding state with each other, which can not only fix rotating shafts 392 of different sizes, but also ensure stability.

[0039] After fixing, cylinder 42 drives connecting frame 43 to move up and down, allowing industrial camera 49 to adjust its detection height according to the size of roller 36, making the industrial camera 49 parallel to the center of roller 36. Third servo motor 44 drives one-way threaded rod 46 to rotate, thereby controlling mounting base 47 and industrial camera 49 to move back and forth along roller 36, achieving full scanning detection of roller 36 surface. The supplementary lights 48 on both sides of industrial camera 49 provide uniform and stable illumination, effectively avoiding detection blind spots caused by insufficient or uneven light, ensuring clear and accurate detection images, and improving detection accuracy and defect identification reliability.

[0040] During the testing process, the second servo motor 34 drives the rotating rod 39 and the rotating seat 37 to rotate at a constant speed, thereby causing the fixed frame 38 to drive the roller 36 to rotate flexibly, which facilitates the comprehensiveness of the testing during the testing process.

[0041] The industrial camera 49 can take pictures at fixed time intervals or according to the rotation of the roller 36 to ensure that the captured images can completely cover the surface of the roller 36 and that there is a certain overlap between adjacent images, so as to facilitate subsequent image stitching and analysis. The industrial camera 49 needs to be connected to a computer during use so that the captured images can be transmitted to the computer via a data cable for further processing and analysis. The industrial camera 49 and the computer are existing technologies and are essential skills for those skilled in the art, and will not be described in detail in this case.

[0042] The industrial camera 49 is model Basler acA2040-90um. In this application, the first servo motor 31, the second servo motor 34, the third servo motor, the cylinder 42, the fill light 48, and the industrial camera 49 can be connected to the same controller to ensure collaborative operation between the devices. The controller is existing technology.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A surface defect detection device for printing rollers, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the testing platform (2), the testing platform (2) is provided with a fixing mechanism (3) on the top, and the testing platform (2) is provided with a testing mechanism (4) on the right side of the top; The fixing mechanism (3) includes a first servo motor (31), which is fixedly connected to the front side of the testing table (2). A first bidirectional threaded rod (32) is fixedly connected to the rear side of the first servo motor (31). A load-bearing frame (33) is threadedly connected to the outer periphery of the first bidirectional threaded rod (32). A support frame (35) is fixedly connected to the front side of the load-bearing frame (33). A second servo motor (34) is fixedly connected to the front side of the support frame (35). A rotating rod (39) is fixedly connected to the rear side of the second servo motor (34). A rotating seat (37) is fixedly connected to the rear side of the rotating rod (39). The rotating seat (37) is rotatably connected to the inside of the load-bearing frame (33). A fixing frame (38) is fixedly connected to the rear side of the rotating seat (37). A second bidirectional threaded rod (391) is rotatably connected inside the fixing frame (38). A knob (393) is fixedly connected to the top of the second bidirectional threaded rod (391). A movable frame (394) is threadedly connected to the outer side of the second bidirectional threaded rod (391). The movable frame (394) is slidably connected to the fixed frame (38). A clamping plate (395) is fixedly connected to the rear side of the movable frame (394). A rotating shaft (392) is provided on the inner side of the clamping plate (395). A roller (36) is fixedly connected to the outer side of the rotating shaft (392).

2. The printing roller surface defect detection device according to claim 1, characterized in that: The first bidirectional threaded rod (32) is rotatably connected to the inside of the testing table (2) on its rear side, the inner side of the load-bearing frame (33) is slidably connected to the inside of the testing table (2), and the rotating rod (39) is rotatably connected to the inside of the support frame (35).

3. The printing roller surface defect detection device according to claim 1, characterized in that: The inner side of the clamping plate (395) is in contact with the outer side of the rotating shaft (392). There are two sets of the movable frame (394) and clamping plate (395). The two sets of movable frames (394) and clamping plates (395) are symmetrically distributed around the second bidirectional threaded rod (391), and the two sets of clamping plates (395) are in a sliding state relative to each other.

4. The printing roller surface defect detection device according to claim 1, characterized in that: The load-bearing frame (33), rotating seat (37), fixed frame (38), second bidirectional threaded rod (391), knob (393), moving frame (394) and clamping plate (395) are provided in two sets, and the two sets of the load-bearing frame (33), rotating seat (37), fixed frame (38), second bidirectional threaded rod (391), knob (393), moving frame (394) and clamping plate (395) are symmetrically distributed on the front and rear sides of the roller body (36).

5. The printing roller surface defect detection device according to claim 1, characterized in that: The load-bearing frame (33) has a limiting groove inside, and the rotating seat (37) is rotatably connected to the limiting groove.

6. The printing roller surface defect detection device according to claim 1, characterized in that: The testing mechanism (4) includes a support platform (41), which is fixedly connected to the top right side of the testing platform (2). A cylinder (42) is fixedly connected to the bottom of the support platform (41). A connecting frame (43) is fixedly connected to the top of the cylinder (42). A rectangular frame (45) is fixedly connected to the inner side of the connecting frame (43). A third servo motor (44) is fixedly connected to the front side of the rectangular frame (45). A one-way threaded rod (46) is fixedly connected to the rear side of the third servo motor (44). A mounting base (47) is threadedly connected to the outer side of the one-way threaded rod (46). An industrial camera (49) is fixedly connected to the top of the mounting base (47). A fill light (48) is fixedly connected to the front and rear sides of the industrial camera (49).

7. The printing roller surface defect detection device according to claim 6, characterized in that: The connecting frame (43) is slidably connected to the inside of the support platform (41), and the one-way threaded rod (46) is rotatably connected to the rectangular frame (45) on the rear side.

Images