A steel coil marking box
Patent Information
- Application Number
- CN202522619247.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-12-10
AI Technical Summary
传统喷印方法依赖人工操作，工人通过字模与喷枪在钢卷表面进行喷印，该方法常面临喷印位置存在偏差、字迹模糊不清、工人长期暴露于标识液挥发物环境中影响职业健康等问题
[0014]1）本实用新型应用安装在工业机械臂上，本实用新型通过连接法兰与工业机械臂的端部，在工业机械臂的带动下执行喷印作业，工业机械臂调整好角度使弹性伸缩杆的伸缩端对准钢卷的顶部正上方，垂直行进，使伸缩端接触钢卷径向外壁面，直至触发行程传感器的信号后停止，获取当前钢卷直径大小。工业机械臂调整好角度使弹性伸缩杆的伸缩端对准钢卷的端面后，平移行进，使伸缩端接触钢卷端面，直至触发行程传感器的信号后停止，获取当前定位坐标位置，并依据这两次的定位坐标计算得到喷码坐标，工业机械臂退回一定距离，调整角度将喷码模块对准钢卷端面，最后移动至计算得到喷码坐标执行喷码作业。
Smart Images
Figure CN224868094U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paint spraying equipment technology, and in particular to a steel coil spraying box. Background Technology
[0002] After steel coils are produced, they need to be marked with key information such as specifications, material, furnace number, and production date to facilitate warehousing management, quality traceability, and logistics. Traditional marking methods rely on manual operation, with workers using stencils and spray guns to print on the surface of the steel coils. This method often faces problems such as printing position deviations, unclear lettering, and occupational health risks due to long-term exposure of workers to the volatile components of the marking solution. These limitations make traditional marking methods unsuitable for the high precision, high reliability, and high efficiency requirements of modern steel production. Therefore, the use of automated industrial robotic arms to replace manual marking operations has become an industry trend. However, during the production line transport of steel coils, each coil varies in position and diameter. When using an industrial robotic arm for inkjet printing, these differences in coil position lead to inconsistent printing distances, affecting print quality and potentially causing the print head to collide with the coil if the coil is too close. Furthermore, existing inkjet printers offer poor protection against the harsh conditions of hot-rolled steel coil surfaces, high dust levels, and complex environments, making the print head susceptible to damage, resulting in high equipment failure rates and increased maintenance costs. Therefore, to address the issues of print positioning and dust protection, this application provides a steel coil inkjet printer applicable to industrial robotic arms. Utility Model Content
[0003] This utility model provides a steel coil printing box that can measure the diameter and printing position of the steel coil to be printed, thereby enabling the industrial robotic arm to obtain accurate printing coordinates and maintain the same spacing for each print, thus improving printing quality; at the same time, the entire device is located in a protective box, which provides effective dust protection.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A steel coil inkjet printing box includes a protective box, a fixing base, a positioning mechanism, and a coding module. The protective box has an internal cavity structure. One end of the fixing base has a connecting flange for fixed connection with an industrial robotic arm, and the other end of the fixing base has a fixing connecting plate. The positioning mechanism is fixedly installed on one side of the fixing connecting plate, and the coding module is fixedly installed on the other side of the fixing connecting plate. The protective box is fixedly connected to the periphery of the fixing connecting plate to enclose the positioning mechanism and the coding module within the protective box. The positioning mechanism includes an elastic telescopic rod and a stroke sensor. Both the elastic telescopic rod and the stroke sensor are fixedly installed on the fixing connecting plate. The telescopic end of the elastic telescopic rod and the printhead of the coding module both extend outside the protective box. The stroke sensor is located on one side of the telescopic end to sense the position of the telescopic end.
[0006] Furthermore, the orientation of the elastic telescopic rod is different from the orientation of the printhead of the inkjet module.
[0007] Furthermore, the orientation of the elastic telescopic rod is perpendicular to the orientation of the printhead of the inkjet module.
[0008] Further, the elastic telescopic rod includes a guide rod, a positioning sleeve, a compression spring, a telescopic rod, and two marker pieces; one side of the fixed connecting plate extends outward with two first connecting ears arranged parallel to each other vertically; the positioning sleeve is fixedly connected to the lower first connecting ear; the guide rod is threadedly connected to the upper first connecting ear; the guide rod and the positioning sleeve are coaxially arranged; the telescopic rod is slidably connected inside the positioning sleeve; the top of the telescopic rod has a deep groove; one end of the compression spring is fitted onto the guide rod; the other end of the compression spring abuts against the deep groove at the top of the telescopic rod; the two marker pieces are detachably connected to one side of the telescopic rod in an vertically distributed manner; the number of stroke sensors is set to two; the sensing end of each stroke sensor faces one marker piece; each stroke sensor senses and identifies the position stroke of a corresponding marker piece.
[0009] Furthermore, the fixed connecting plate is a square plate with chamfered corners at its four corners. The fixed connecting plate is fixedly connected to the connecting flange by a connecting rod. One end of the connecting rod is fixedly connected to the center of the connecting flange, and the other end of the connecting rod is connected to the chamfered corner above the rear end of the fixed connecting plate.
[0010] Furthermore, the protective box includes a first protective cover and a second protective cover. The first protective cover covers the side of the fixed connecting plate corresponding to the inkjet printing module to form a first cavity structure, and the second protective cover covers the other side of the fixed connecting plate to form a second cavity. The edges of the first protective cover and the second protective cover are fixedly connected to the periphery of the fixed connecting plate by bolts to form the protective box. The front end of the first protective cover is provided with a first clearance hole corresponding to the position of the printhead, and the second protective cover is provided with a second clearance hole corresponding to the position of the elastic telescopic rod.
[0011] Furthermore, the fixed connecting plate is provided with a second connecting ear corresponding to the rear end of the inkjet module. A pipeline protection connector is fixedly connected to the second connecting ear. One end of the pipeline protection connector extends to the outside of the first protective cover. The pipeline protection connector is used to connect to the outside of the pipeline and line. A through pipeline avoidance hole is opened on the fixed connecting plate. The pipeline avoidance hole connects the first cavity and the second cavity.
[0012] Furthermore, two anti-collision posts are provided on one side of the front end of the fixed connecting plate.
[0013] The beneficial effects of this utility model are:
[0014] 1) This utility model is installed on an industrial robotic arm. The robotic arm connects to the end of the flange and performs the printing operation. The robotic arm adjusts its angle so that the telescopic end of the elastic telescopic rod is directly above the top of the steel coil. It moves vertically until the telescopic end contacts the radial outer wall of the steel coil, stopping after triggering the stroke sensor signal, thus obtaining the current steel coil diameter. After adjusting its angle so that the telescopic end of the elastic telescopic rod is aligned with the end face of the steel coil, the robotic arm moves horizontally until the telescopic end contacts the end face of the steel coil, stopping after triggering the stroke sensor signal, thus obtaining the current positioning coordinates. Based on these two positioning coordinates, the inkjet coordinates are calculated. The robotic arm then retracts a certain distance, adjusts its angle to align the inkjet module with the end face of the steel coil, and finally moves to the calculated inkjet coordinates to perform the inkjet printing operation.
[0015] 2) The orientation of the elastic telescopic rod is set to be different from that of the inkjet module's printhead. After positioning, the angle is adjusted to perform air-to-air inkjet printing to avoid vibration caused by the contact between the telescopic end of the elastic telescopic rod and the end face of the steel coil during the inkjet printing process, which would affect the inkjet printing quality.
[0016] 3) The working principle of the positioning structure is to use two stroke sensors and two markers to identify the relative position of the steel coil end face. When the telescopic rod moves to directly above the top of the steel coil radially, it slowly descends vertically, triggering the first stroke sensor signal. This alerts the industrial robotic arm that it has touched the top outer wall of the steel coil. Upon receiving the signal, it immediately stops pressing down and calculates the current steel coil diameter and current positioning coordinates to determine the height coordinates. Then, the industrial robotic arm carries the telescopic positioning rod to the side end face of the steel coil and moves perpendicular to the end face until it triggers the second stroke sensor. At this point, it alerts the industrial robotic arm that it has reached the inkjet marking positioning coordinates. The industrial robotic arm immediately stops and records the current coordinate position to obtain the current inkjet marking position relative to the steel coil. When the industrial robotic arm retracts a certain distance, the telescopic rod resets under the elastic force of the compression spring. After the industrial robotic arm retracts a certain safe distance, it can adjust the angle of the inkjet marking module and move to the inkjet marking position to perform the inkjet marking operation.
[0017] 4) The first protective cover and the second protective cover are fixedly attached to the fixed connecting plate to form a protective box, which encloses the positioning mechanism and the coding module. This can prevent the internal structure from being contaminated by dust, while also reducing the heat radiation of the steel coil itself, slowing down the aging of the internal pipelines, and extending the service life of the internal components. Attached Figure Description
[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:
[0019] Figure 1 This is a perspective view of the overall structure of this utility model;
[0020] Figure 2 This is a perspective view of one side of the present invention after omitting the protective box;
[0021] Figure 3 This is a perspective view of the other side of the present invention without the protective box.
[0022] Attached image labels:
[0023] 1-Protective box, 2-Fixed base, 3-Positioning mechanism, 4-Coding module, 21-Connecting flange, 22-Fixed connecting plate, 31-Elastic telescopic rod, 32-Stroke sensor, 311-Guide rod, 312-Positioning bushing, 313-Compression spring, 314-Telescopic rod, 315-Identification piece, 211-First connecting ear, 11-First protective cover, 12-Second protective cover, 222-Second connecting ear, 223-Pipeline clearance hole, 23-Connecting rod, 24-Anti-collision post, 5-Pipeline protection connector. Detailed Implementation
[0024] 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.
[0025] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a central component. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a central component. When a component is described as "set on" another component, it can be directly set on the other component or may have a central component. When a component is described as "set in the middle," it is not simply set in the exact center, as long as it is not set within the area defined by both ends being in the middle. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0027] Reference Figures 1 to 3As shown, a steel coil inkjet printing box includes a protective box 1, a fixing base 2, a positioning mechanism 3, and an inkjet printing module 4. The protective box 5 has a hollow structure inside. One end of the fixing base 2 is provided with a connecting flange 21 for fixed connection with an industrial robotic arm, and the other end of the fixing base 2 is provided with a fixing connecting plate 22. The positioning mechanism 3 is fixedly installed on one side of the fixing connecting plate 22, and the inkjet printing module 4 is fixedly installed on the other side of the fixing connecting plate 22. The protective box 1 is fixedly connected to the periphery of the fixing connecting plate 22 to enclose the positioning mechanism 3 and the inkjet printing module 4 within the protective box 1. The positioning mechanism 3 includes an elastic telescopic rod 31 and a stroke sensor 32. The elastic telescopic rod 31 and the stroke sensor 32 are both fixedly installed on the fixing connecting plate 22. The telescopic end of the elastic telescopic rod 31 and the printhead of the inkjet printing module 4 both extend outside the protective box 1. The stroke sensor 32 is disposed on one side of the telescopic end to sense the position of the telescopic end. This utility model is installed on an industrial robotic arm. It connects to the end of the industrial robotic arm via a connecting flange 21. Driven by the robotic arm, it performs the printing operation. The steel coil is transported to the coding station by a stepping beam. The robotic arm adjusts its angle so that the telescopic end of the elastic telescopic rod 31 is directly above the radial top of the steel coil. It slowly descends vertically until the signal from the stroke sensor 32 is triggered, at which point it immediately stops descending and obtains the current positioning coordinates and calculates the diameter of the steel coil. Then, it moves the telescopic end of the elastic telescopic rod 31 to the side end face of the steel coil, moving horizontally until the telescopic end contacts the end face of the steel coil, stopping after triggering the signal from the stroke sensor 32. It obtains the current positioning coordinates and calculates the coding coordinates based on the previously obtained positioning coordinates. The robotic arm retracts a certain distance, adjusts its angle to align the coding module 4 with the side of the steel coil, and finally moves to the calculated coding coordinates to perform the coding operation.
[0028] If the elastic telescopic rod 31 is oriented in the same direction as the inkjet printing module 4, the elastic telescopic rod 31 will preferentially contact the end face of the steel coil. In this state, moving the inkjet printing module will cause vibration as the telescopic end of the elastic telescopic rod 31 contacts the end face of the steel coil, affecting the printing quality. Therefore, to avoid this situation, the orientation of the elastic telescopic rod 31 and the nozzle orientation of the inkjet printing module 4 should preferably be different. As a preferred embodiment, the orientation of the elastic telescopic rod 31 and the nozzle orientation of the inkjet printing module 4 can be arranged perpendicularly, which is beneficial for industrial robot positioning.
[0029] In this embodiment, the elastic telescopic rod 31 includes a guide rod 311, a positioning bushing 312, a compression spring 313, a telescopic rod 314, and two marking pieces 315; one side of the fixed connecting plate 22 extends outward with two parallel and spaced first connecting ears 221, which are welded and fixed to the fixed connecting plate 22; the positioning bushing 312 is fixedly connected to the lower first connecting ear 221; the guide rod 311 is threadedly connected to the upper first connecting ear 221; the guide rod 311 and the positioning bushing 312 are coaxially arranged; the telescopic rod 314... The telescopic rod 314 is slidably connected inside the positioning bushing 312. The top of the telescopic rod 314 is provided with a deep groove. One end of the compression spring 313 is fitted onto the guide rod 311, and the other end of the compression spring 313 abuts against the deep groove at the top of the telescopic rod 314. Two markers 315 are detachably connected to one side of the telescopic rod 314, arranged vertically. The number of stroke sensors 32 is set to two. The sensing end of each stroke sensor 32 faces one of the markers 315, and each stroke sensor 32 should identify the position stroke of the corresponding marker 315. The telescopic rod 314 is the telescopic end of the elastic telescopic rod 31. The telescopic rod 314 moves elastically along the guide of the positioning sleeve 312 and the elastic force of the compression spring 313. The marking piece 315 can be a bolt. The marking piece 315 is threaded to the outer wall of the telescopic rod 314. After the telescopic rod 314 passes through the positioning sleeve 312 from the bottom, it is connected to the marking piece 315. The marking piece 315 located at the bottom also plays an anti-disengagement role, preventing the telescopic rod from detaching from the positioning sleeve 312. The working principle of positioning structure 3 is to use two stroke sensors 32 and two markers to identify the relative position of the steel coil diameter and the side end face. When the telescopic rod 314 moves to directly above the radial top of the steel coil, it slowly descends vertically, triggering a signal from the first stroke sensor 32, indicating that the industrial robotic arm has touched the outer wall of the top of the steel coil. After receiving the signal, it immediately stops pressing down and calculates the current steel coil diameter and current positioning coordinates, thereby determining the height coordinates. Then, the industrial robotic arm carries the telescopic positioning rod to the side end face of the steel coil, perpendicular to the end face position. During the translational movement, when the telescopic rod 314 touches the end face of the steel coil, it triggers the signal of the first stroke sensor 32, indicating that the industrial robotic arm has touched the end face of the steel coil. After continuing to move forward, it triggers the signal of the second stroke sensor 32, indicating that the industrial robotic arm has reached the inkjet positioning coordinate. After receiving the signal, the industrial robotic arm immediately stops and records the current coordinate position. The industrial robotic arm then retreats to a certain safe distance, and the telescopic rod 314 resets under the elastic force of the compression spring 313. The industrial robotic arm can then adjust the angle of the inkjet module 4 to align with the inkjet position and perform the inkjet printing operation.
[0030] The fixed connecting plate 22 is a square plate with chamfered corners. The fixed connecting plate 22 is fixedly connected to the connecting flange 21 by a connecting rod 23. One end of the connecting rod 23 is fixedly connected to the center of the connecting flange 21, and the other end of the connecting rod 23 is connected to the chamfered corner above the rear end of the fixed connecting plate 22.
[0031] The protective box 1 includes a first protective cover 11 and a second protective cover 12. The first protective cover 11 covers the side of the fixed connecting plate 22 corresponding to the location of the inkjet printing module 4, forming a first cavity structure. The second protective cover 12 covers the other side of the fixed connecting plate 22, forming a second cavity. The edges of the first protective cover 11 and the second protective cover 12 are fixedly connected to the periphery of the fixed connecting plate 22 by bolts to form the protective box 1. The front end of the first protective cover 11 has a first clearance hole corresponding to the position of the printhead, and the second protective cover 12 has a second clearance hole corresponding to the position of the elastic telescopic rod 31. The first protective cover 11 and the second protective cover 12 are fixedly fitted onto the fixed connecting plate 22 to form the protective box 1, which encloses the positioning mechanism 3 and the inkjet printing module 4. This can prevent the internal structure from being contaminated by dust, while also reducing the heat radiation of the steel coil itself, slowing down the aging rate of the internal pipelines, and extending the service life of the internal components.
[0032] The fixed connecting plate 22 is provided with a second connecting ear 222 at the rear end of the inkjet module 4. The second connecting ear 222 is welded and fixed to the fixed connecting plate 22. A pipeline protection connector 6 is fixedly connected to the second connecting ear 222. One end of the pipeline protection connector 6 extends to the outside of the first protective cover 11. The pipeline protection connector 6 is used for connecting to external pipelines and lines. The fixed connecting plate 22 is provided with a through pipeline avoidance hole 223, which connects the first cavity and the second cavity. The first protective cover 11 is also provided with a third avoidance hole at the position corresponding to the pipeline protection connector 6. In this embodiment, the inkjet module 4 can be a mature product with self-cleaning function that is currently available on the market. The inkjet module 4 is connected to an external ink supply system, a cleaning fluid supply system, and an external air source. The connecting pipe and the wire enter the protective box 1 through the pipeline protection connector 6 and connect to the inkjet module 4.
[0033] Two anti-collision posts 24 are provided on one side of the front end of the fixed connecting plate 22. The anti-collision posts 24 can be replaced by bolts and fixed to the front end of the fixed connecting plate 22 by threaded connection. The distance between the anti-collision posts and the front end of the fixed connecting plate 22 is greater than the distance of the nozzle extending out of the first protective cover. Even if an accidental impact occurs, the nozzle can be protected from damage.
[0034] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of the technical solution of this utility model.
Claims
1. A steel coil inkjet printing box, characterized in that, The system includes a protective box, a mounting base, a positioning mechanism, and a coding module. The protective box has an internal cavity structure. One end of the mounting base has a connecting flange for fixed connection with an industrial robotic arm, and the other end has a fixed connecting plate. The positioning mechanism is fixedly mounted on one side of the fixed connecting plate, and the coding module is fixedly mounted on the other side of the fixed connecting plate. The protective box is fixedly connected to the periphery of the fixed connecting plate to enclose the positioning mechanism and the coding module within the protective box. The positioning mechanism includes an elastic telescopic rod and a stroke sensor. Both the elastic telescopic rod and the stroke sensor are fixedly mounted on the fixed connecting plate. The telescopic end of the elastic telescopic rod and the printhead of the coding module both extend outside the protective box. The stroke sensor is located on one side of the telescopic end to sense the stroke of the telescopic end.
2. A steel coil inkjet printing box according to claim 1, characterized in that, The orientation of the elastic telescopic rod is different from the orientation of the printhead of the inkjet module.
3. A steel coil inkjet printing box according to claim 2, characterized in that, The elastic telescopic rod is arranged perpendicular to the nozzle of the inkjet module.
4. A steel coil inkjet printing box according to claim 1, characterized in that, The elastic telescopic rod includes a guide rod, a positioning sleeve, a compression spring, a telescopic rod, and two marker pieces. Two parallel, spaced-apart first connecting ears extend outward from one side of the fixed connecting plate. The positioning sleeve is fixedly connected to the lower first connecting ear, and the guide rod is threadedly connected to the upper first connecting ear. The guide rod and the positioning sleeve are coaxially arranged. The telescopic rod is slidably connected within the positioning sleeve. A deep groove is provided at the top of the telescopic rod. One end of the compression spring is fitted onto the guide rod, and the other end of the compression spring abuts against the deep groove at the top of the telescopic rod. The two marker pieces are detachably connected to one side of the telescopic rod, arranged vertically. Two stroke sensors are used, with the sensing end of each stroke sensor facing one marker piece. Each stroke sensor senses and identifies the position stroke of a corresponding marker piece.
5. A steel coil inkjet printing box according to claim 1, characterized in that, The fixed connecting plate is a square plate with chamfered corners. The fixed connecting plate is fixedly connected to the connecting flange by a connecting rod. One end of the connecting rod is fixedly connected to the center of the connecting flange, and the other end of the connecting rod is fixedly connected to the chamfered corner above the rear end of the fixed connecting plate.
6. A steel coil inkjet printing box according to claim 5, characterized in that, The protective box includes a first protective cover and a second protective cover. The first protective cover covers the side of the fixed connecting plate corresponding to the inkjet module to form a first cavity structure. The second protective cover covers the other side of the fixed connecting plate to form a second cavity. The edges of the first and second protective covers are fixedly connected to the periphery of the fixed connecting plate by bolts to form the protective box. The front end of the first protective cover is provided with a first clearance hole corresponding to the position of the printhead, and the second protective cover is provided with a second clearance hole corresponding to the position of the elastic telescopic rod.
7. A steel coil inkjet printing box according to claim 6, characterized in that, The fixed connecting plate is provided with a second connecting ear at the rear end of the inkjet module. A pipeline protection connector is fixedly connected to the second connecting ear. One end of the pipeline protection connector extends to the outside of the first protective cover. The pipeline protection connector is used to connect to external pipelines and lines. A through pipeline avoidance hole is provided on the fixed connecting plate. The pipeline avoidance hole connects the first cavity and the second cavity.
8. A steel coil inkjet printing box according to claim 5, characterized in that, Two anti-collision posts are provided on one side of the front end of the fixed connection plate.