Laser marking device for aluminum coils output from hot finishing mill

Abstract

This utility model relates to a laser marking device for the surface of aluminum coils output from a hot finishing mill. It includes a guide roller for guiding the aluminum strip at the output end of the hot finishing mill and a coiler for winding the aluminum strip into an aluminum coil. Below the coiler is a guide rail arranged along its axial direction and a coil transport trolley mounted on the guide rail. A fixed frame and a three-axis positioning transmission mechanism driven by a controller are mounted on the side of the guide rail away from the coiler. A marking laser emitter is installed on the three-axis positioning transmission mechanism. This laser marking device for the surface of aluminum coils output from a hot finishing mill can quickly and accurately print labels on aluminum coils of different specifications.

Description

Technical fields:

[0001] This utility model relates to a laser marking device, and more particularly to a laser marking device for the surface of aluminum coils output from a hot finishing mill. Background technology:

[0002] With the development of the aluminum processing industry, the market's quality requirements for hot-rolled aluminum products are constantly increasing. Due to the long production process in the aluminum processing industry, in order to achieve full-process quality monitoring, product information needs to be printed on the surface of the aluminum coils produced by upstream machines for easy tracking. In the past, aluminum coil information was often handwritten on the surface of the aluminum coils by workers using crayons. This method was inefficient and the handwriting was not standardized, resulting in errors and unclear writing. Previously, some factories tried to use laser rangefinders in conjunction with inkjet printers to achieve printing position positioning and information printing. However, due to the smooth surface and high reflectivity of aluminum coils, the laser rangefinder method suffered from unstable laser signals, leading to positioning failures. Furthermore, with this method, the three axes of the marking machine need to be positioned sequentially, resulting in long positioning times. If the production pace of the machine is fast, there is a problem that the printing pace cannot keep up. Summary of the Invention:

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a laser marking device for the surface of aluminum coils output from a hot finishing mill. This laser marking device for the surface of aluminum coils output from a hot finishing mill can be used to quickly and accurately print labels on aluminum coils of different specifications.

[0004] This utility model discloses a laser marking device for the surface of aluminum coils output from a hot finishing mill. The device comprises a guide roller for guiding the aluminum strip at the output end of the hot finishing mill and a coiler for winding the aluminum strip into an aluminum coil. Below the coiler is a guide rail arranged along its axial direction and a coil transport vehicle mounted on the guide rail. A fixed frame is provided on the side of the guide rail away from the coiler, and a three-axis positioning transmission mechanism driven by a controller is mounted on the fixed frame. A marking laser emitter is installed on the three-axis positioning transmission mechanism.

[0005] Preferably, the above-mentioned three-axis positioning transmission mechanism includes three motors controlled by the controller and three motors driving the Y-axis moving frame, X-axis moving frame and Z-axis moving frame respectively, and the coding laser emitting head is installed on the Z-axis moving frame.

[0006] Preferably, the controller is electrically connected to an anti-collision limit switch mounted on the Z-axis moving frame.

[0007] Preferably, the controller is electrically connected to a host computer, the host computer is electrically connected to the encoder of the drive motor of the guide roller to detect the speed of the drive motor; the host computer is electrically connected to the encoder of the motor of the winding machine to detect the speed of the motor of the winding machine.

[0008] Preferably, the three motors drive the Y-axis moving frame, X-axis moving frame, and Z-axis moving frame to move through a lead screw and nut mechanism, respectively.

[0009] The working method of the laser marking device on the surface of aluminum coils output from the hot finishing mill of this utility model includes the following steps:

[0010] Step S1: After the hot finishing mill finishes producing aluminum coils, the coil diameter and the measured coil width signals are sent to the controller.

[0011] Step S2: Based on the aluminum roll diameter and width information, calculate the required X, Y, and Z axis coordinates of the marking laser emitter, and control the controller to move the X, Y, and Z axes of the marking laser emitter to the set coordinate positions;

[0012] Step S3: The transport carriage moves the aluminum coil wound by the coiler to the marking position located in front of the fixed frame next to the guide rail;

[0013] Step S4: The marking laser emitter starts printing, printing the aluminum coil information to the center of the outer ring of the aluminum coil;

[0014] Step S5: After the coding laser emitter finishes printing, the controller returns it to its original position.

[0015] Step S6: The transport vehicle moves the coded aluminum coils to the aluminum coil storage area.

[0016] This invention collects and calculates the specifications of the aluminum coil in advance. Before the coil transport vehicle moves the aluminum coil to the marking position, the controller drives the three-axis positioning transmission mechanism and the marking laser emitter on it to complete the positioning of the X, Y, and Z axes for printing. When the coil transport vehicle moves the aluminum coil to the marking position, laser marking can start immediately. Since the printing position positioning is completed in advance, this method eliminates the three-axis positioning process and does not require the use of a laser rangefinder sensor, effectively improving printing efficiency and success rate. Attached image description:

[0017] The present invention will be further described below with reference to the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view schematic diagram of the coil transport vehicle and the three-axis positioning transmission mechanism;

[0020] Figure 3 This is a front view schematic diagram of the fixed frame and the three-axis positioning transmission mechanism;

[0021] Figure 4 This is a graph showing the relationship between the position of the marking laser emitter on the Y-axis and the diameter of the aluminum roll;

[0022] Figure 5 This is a graph showing the relationship between the Z-axis position of the marking laser emitter and the diameter of the aluminum roll;

[0023] Figure 6 This is a graph showing the relationship between the X-axis position of the marking laser emitter and the width of the aluminum roll;

[0024] Figure 7 This is a block diagram illustrating the working principle of the circuit of this utility model. Detailed implementation method:

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The laser marking device for aluminum coils output from the hot finishing mill of this utility model includes a deflector roller 2 for guiding aluminum strips and a coiler 3 for winding aluminum strips to form aluminum coils A, which are located at the output end of the hot finishing mill 1. The deflector roller 2 and the coiler 3 are driven to rotate by drive motors respectively.

[0027] The coiler is provided with a guide rail 4 arranged along its axial direction and a coil transport 5 on the guide rail. The coil transport 5 can move along the transmission direction of the guide rail. The coil transport 5 may have a lifting mechanism so that after the coil transport 5 and the lifting mechanism thereon move to the area directly below the aluminum coil on the coiler 3, the lifting mechanism rises to support the aluminum coil. After the coiler unlocks the aluminum coil, the aluminum coil is released from the coiler 3 as the coil transport 5 moves along the guide rail.

[0028] A fixed frame 6 is provided on the side of the guide rail 4 along its length and away from the winding machine (e.g., at a distance of 1-5 meters), and a three-axis positioning transmission mechanism 8 driven by a controller 7 is provided on the fixed frame 6. A coding laser emitter 9 is installed on the three-axis positioning transmission mechanism.

[0029] The three-axis positioning transmission mechanism 8 includes three motors controlled by a controller and three motors driving the Y-axis moving frame 81, X-axis moving frame 82, and Z-axis moving frame 83 respectively. The coding laser emitter 9 is mounted on the Z-axis moving frame 83. In addition to the coding laser emitter 9, the Z-axis moving frame 83 also has a coding machine that triggers the coding laser emitter 9 to work. The coding machine is electrically connected to the controller. After the coding laser emitter 9 moves into position, the controller triggers the coding machine to work, and the coding laser emitter 9 codes the surface of the aluminum coil.

[0030] Specifically, the three motors drive the Y-axis moving frame, X-axis moving frame, and Z-axis moving frame respectively through a lead screw and nut mechanism; of course, the three motors and the three sets of lead screw and nut mechanisms can be integrated into a linear motor or electric push cylinder, etc., which can realize the movement and positioning of the marking laser emitter 9 in three coordinate positions.

[0031] To prevent impact on the aluminum coil, an anti-collision limit switch 10 is electrically connected to the controller 7 and installed on the Z-axis moving frame. The anti-collision limit switch 10 is a commercially available component, and its working principle will not be described here. Through the anti-collision limit switch 10, the three-axis positioning transmission mechanism 8 controlled by the controller 7 can be prevented from accidentally colliding with the aluminum coil.

[0032] The controller 7 is electrically connected to the host computer 11, and the host computer 11 is electrically connected to the encoder 12 of the drive motor of the guide roller to detect the speed of the drive motor; the host computer 11 is also electrically connected to the encoder 13 of the motor of the winding machine to detect the speed of the motor of the winding machine.

[0033] In the diagram, A1 is the marking position for small-diameter aluminum coils, and A2 is the marking position for large-diameter aluminum coils.

[0034] The specific control method of the controller is as follows:

[0035] The diameter of aluminum coils is calculated as follows: Aluminum strip produced by the rolling mill (hot finishing mill) passes through guide rollers at the mill exit and is then wound into aluminum coils by a coiler. The operation process is as follows: Figure 1 As shown. The motor of the guide roller is equipped with an encoder to detect the motor speed n. p The linear velocity v of the guide roller can be calculated based on the gear ratio of the reducer and the diameter of the guide roller. p The winding machine motor is also equipped with an encoder, which can detect the winding machine's rotational speed n. j However, since the diameter of the aluminum coil on the winding machine continuously increases during the production process, it is impossible to directly calculate the linear velocity v of the aluminum coil on the winding machine. j The linear velocity of the aluminum coil on the coiler is equal to the linear velocity of the guide roller. Therefore, the diameter of the aluminum coil on the coiler can be calculated using the conversion formula between the coiler's rotational speed and linear velocity.

[0036] From the above, the following formulas can be listed:

[0037]

[0038] therefore:

[0039]

[0040] in:

[0041] v j - Winder linear speed (unit: m / s)

[0042] v p - The linear speed of the guide roller, measured in m / s, is obtained from the encoder.

[0043] n j - The winding machine speed, measured in r / min, is obtained from the encoder.

[0044] D-Aluminum coil diameter (unit: m)

[0045] P-coiler gearbox reduction ratio fixed at 5.5;

[0046] The diameter of the aluminum coil can be calculated using the above formula. The width of the aluminum coil can be measured by the crown gauge at the exit of the hot finishing mill (the crown gauge is an existing device that can measure the width of the aluminum coil; its specific working principle will not be elaborated here). Finally, these specifications (the diameter and width of the aluminum coil) are sent to the controller.

[0047] The controller is based on the winding machine linear speed v. j , deflector roller linear velocity v p Winding machine speed n j The method of substituting the value of the reduction ratio P of the winding machine gearbox into the formula to calculate the diameter of the aluminum coil is a commonly used technique in the field of electromechanical control, which will not be elaborated here.

[0048] Since the focal length of the marking laser emitter 9 is a fixed value, the positions of its Y and Z axes are only related to the diameter of the aluminum coil, and the position of its X-axis is only related to the width of the aluminum coil. By manually operating the three axes on-site to mark aluminum coils of different diameters and collecting the positions of the Y, Z, and X axes during normal marking, the following relationship can be obtained:

[0049] Table 1 - Actual X, Y, and Z axis positions corresponding to aluminum coils of different diameters and widths during normal coding.

[0050]

[0051]

[0052] pass Figure 4-6 The relationship diagram shows:

[0053] Y set = -0.5052 × D + 1532.7

[0054] Z set =0.5165×D-799.33

[0055] X set = -0.4373 × W + 875.34

[0056] in:

[0057] Y set Y-axis position setting value of the coding machine, unit: mm

[0058] Z set Z-axis position setting value of the coding machine, unit: mm

[0059] X setX-axis position setting value of the coding machine, unit: mm

[0060] D: Diameter of the aluminum coil to be coded

[0061] W: Width of the aluminum coil to be coded.

[0062] Calculating the X, Y, and Z coordinate values ​​in the controller by substituting the diameter and width of the aluminum coil into the formula is a common technique in the field of electromechanical control, and will not be elaborated here.

[0063] After receiving the diameter and width information of the next aluminum coil, the controller automatically calculates the set positions of X, Y, and Z using the above formula. Then, the controller controls the three-axis positioning transmission mechanism to move the marking laser emitter 9 to the set position. When the aluminum coil reaches the marking position, the marking laser emitter 9 starts printing. After printing is completed, the coil transport vehicle continues to move to transfer the aluminum coil to the aluminum coil storage area.

[0064] In order to enable the automatic calculation and positioning of the coding machine, this embodiment adopts the following control method through programming, which specifically includes the following steps:

[0065] Step S1: After the hot finishing mill finishes producing aluminum coils, the coil diameter and the measured coil width signals are sent to the controller.

[0066] Step S2: Based on the aluminum roll diameter and width information, calculate the required X, Y, and Z axis coordinates of the marking laser emitter, and control the controller to move the X, Y, and Z axes of the marking laser emitter to the set coordinate positions;

[0067] Step S3: The transport carriage moves the aluminum coil wound by the coiler to the marking position located in front of the fixed frame next to the guide rail;

[0068] Step S4: The marking laser emitter starts printing, printing the aluminum coil information to the center of the outer ring of the aluminum coil;

[0069] Step S5: After the coding laser emitter finishes printing, the controller returns it to its original position.

[0070] Step S6: The transport vehicle moves the coded aluminum coils to the aluminum coil storage area.

[0071] This application calculates the diameter of the finished aluminum coil and sends the aluminum coil specifications (diameter and width information) to the controller to pre-calculate the three-axis coordinates of the positioning laser emitter for marking, saving the positioning time of traditional marking machines. At the same time, it eliminates the need for laser rangefinders, effectively improving the operating efficiency and success rate of marking machines.

[0072] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hot finishing mill output aluminum coil surface laser marking device, characterized in that: It includes a deflector roller for guiding aluminum strip at the output end of a hot finishing mill and a coiler for winding aluminum strip into aluminum coils. Below the coiler is a guide rail arranged along its axial direction and a coil transport trolley arranged on the guide rail. A fixed frame is provided on the side of the guide rail away from the coiler and a three-axis positioning transmission mechanism driven by a controller is provided on the fixed frame. A marking laser emitter is installed on the three-axis positioning transmission mechanism.

2. The aluminum coil surface laser marking device output by the hot finishing mill according to claim 1, characterized in that: The three-axis positioning transmission mechanism includes three motors controlled by a controller and three motors that drive the Y-axis moving frame, X-axis moving frame, and Z-axis moving frame respectively. The coding laser emitting head is mounted on the Z-axis moving frame.

3. The laser marking device for the surface of aluminum coils output from a hot finishing mill according to claim 1 or 2, characterized in that: The controller is electrically connected to an anti-collision limit switch mounted on the Z-axis moving frame.

4. The laser marking device for the surface of aluminum coils output from a hot finishing mill according to claim 3, characterized in that: The controller is electrically connected to the host computer, which is electrically connected to the encoder of the drive motor of the guide roller to detect the speed of the drive motor; the host computer is also electrically connected to the encoder of the winding machine motor to detect the speed of the winding machine motor.

5. The laser marking device for the surface of aluminum coils output from a hot finishing mill according to claim 4, characterized in that: The three motors drive the Y-axis moving frame, X-axis moving frame, and Z-axis moving frame to move through a lead screw and nut mechanism, respectively.

Images