Aluminum coil surface laser coding device output by hot finishing mill and working method

Abstract

The invention relates to a laser coding device for the surface of an aluminum coiled material output by a hot finishing mill and a working method, and the laser coding device for the surface of the aluminum coiled material output by the hot finishing mill comprises a deflector roller which is arranged at the output end of the hot finishing mill and is used for guiding an aluminum strip and a coiling machine which is used for coiling the aluminum strip to form an aluminum coil, a guide rail arranged in the axial direction of the coiling machine and a coil conveying vehicle arranged on the guide rail are arranged below the coiling machine, a fixing frame and a three-axis positioning transmission mechanism are arranged on the side portion, away from the coiling machine, of the guide rail, the three-axis positioning transmission mechanism is arranged on the fixing frame and driven by a controller to act, and a coding laser emitting head is installed on the three-axis positioning transmission mechanism. The aluminum coil surface laser coding device output by the hot finishing mill and the working method can be suitable for rapidly and accurately printing labels of aluminum coils of different specifications.

Description

Technical field:

[0001] The invention relates to a laser coding device, in particular to a laser coding device and a working method for the surface of an aluminum coil output by a hot finishing rolling mill. Background technology:

[0002] With the development of the aluminum processing industry, the market's quality requirements for aluminum hot-rolled products are constantly increasing. Due to the long production process of the aluminum processing industry, in order to achieve full-process product quality monitoring, the aluminum coils produced by the upstream machine train need to print product information on the surface of the aluminum coils for easy tracking. In the past, the information of aluminum coils was often handwritten on the surface of the aluminum coils by workers with crayons. This method is inefficient and the handwriting is not standardized, with problems such as errors and unclearness. Previously, some factories tried to use laser ranging sensors in conjunction with inkjet printers to achieve print position positioning and information printing. However, due to the smooth surface and high reflectivity of the aluminum coils, the laser ranging method has the problem of unstable laser signals leading to positioning failures. In addition, the three axes of the marking machine need to be positioned in sequence using this method, so the positioning time is long. If the production rhythm of the machine train is fast, there is a problem that the printing rhythm cannot keep up. Summary of the invention:

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a laser coding device and a working method for the surface of an aluminum coil output by a hot finishing rolling mill, which can be applied to aluminum coils of different specifications for fast and accurate label printing.

[0004] The present invention provides a laser coding device for the surface of an aluminum coil output by a hot finishing rolling mill, which is characterized by comprising a deflection roller arranged at the output end of the hot finishing rolling mill for guiding the aluminum strip and a coiler for winding the aluminum strip to form an aluminum coil, wherein a guide rail arranged along the axial direction thereof and a coil transport vehicle arranged on the guide rail are arranged below the coiler, a fixed frame and a three-axis positioning transmission mechanism arranged on the fixed frame and driven by a controller are arranged on the side of the guide rail away from the coiler, and a coding laser transmitter head is installed on the three-axis positioning transmission mechanism.

[0005] Preferably, the three-axis positioning transmission mechanism comprises three motors respectively controlled by a controller and a Y-axis moving frame, an X-axis moving frame and a Z-axis moving frame respectively driven by the three motors, and the coding laser transmitter head is installed on the Z-axis moving frame.

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

[0007] Preferably, the controller is electrically connected to a host computer, and the host computer is electrically connected to an encoder of a drive motor of the deflector roller to detect the rotation speed of the drive motor; the host computer is electrically connected to an encoder of a motor of a winder to detect the rotation speed of the motor of the winder.

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

[0009] A working method of a laser coding device on the surface of an aluminum coil output by a hot finishing mill of the present invention is characterized by including the following steps:

[0010] Step S1: After the production of the aluminum coil by the hot finishing mill is completed, the coil diameter of the aluminum coil and the width signal of the measured aluminum coil are sent to the controller;

[0011] Step S2: According to the coil diameter and width information of the aluminum coil, calculate the set coordinates of the X, Y, and Z axes of the coding laser emitting head required, and control the X, Y, and Z axes of the coding laser emitting head to move to the set coordinate positions by the controller;

[0012] Step S3: The coil transport vehicle moves the aluminum coil wound by the coiler to the coding position in front of the fixed frame beside the guide rail;

[0013] Step S4: The coding laser emitting head starts to print, and prints the aluminum coil information to the middle position of the outer circle of the aluminum coil;

[0014] Step S5: After the coding laser emitting head finishes printing, it is controlled by the controller to return to the original position;

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

[0016] The algorithm and control method of the controller are as follows:

[0017] The calculation method of the diameter of the aluminum coil output by the hot finishing mill and wound by the coiler is as follows: The aluminum strip produced by the hot finishing mill passes through the deflector roll at the outlet of the hot finishing mill and is wound into an aluminum coil by the coiler. An encoder is installed on the motor of the deflector roll to detect the motor speed n p , and the linear velocity v of the deflector roll can be calculated according to the gear ratio of the reducer and the diameter of the deflector roll p ; An encoder is installed on the motor of the coiler to detect the speed n of the coiler j , during the production process, the diameter of the aluminum coil on the coiler is constantly increasing, and the linear velocity v of the aluminum coil on the coiler cannot be directly calculated j ; and the linear velocity of the aluminum coil on the coiler is equal to the linear velocity of the deflector roll; use the conversion formula of the coiler speed and linear velocity to calculate the diameter of the aluminum coil on the coiler at this time; that is, the formula:

[0018]

[0019] Therefore:

[0020]

[0021] Among them:

[0022] v j - Coiling machine linear speed, unit: m / s

[0023] v p - Deflection roller linear speed, unit: m / s, measured by encoder

[0024] n j - Coiling machine rotational speed, unit: r / min, measured by encoder

[0025] D - Aluminum coil diameter, unit: m

[0026] P - Reduction ratio of coiling machine gearbox, fixed value: 5.5

[0027] The coil diameter of the aluminum coil is calculated by the above formula, and the width information of the aluminum coil is measured by the convexity meter at the outlet of the hot finishing mill. The coil diameter and width information of the aluminum coil are sent to the controller.

[0028] The set positions of the Y and Z axes of the coding laser emitting head are related to the aluminum coil diameter, and the set value position of the X axis is related to the aluminum coil width. The relationships between the positions of the Y, Z, and X axes and the aluminum coil diameter and width are as follows: Y set = - 0.5052×D + 1532.7

[0029] Z set =0.5165×D - 799.33

[0030] X set = - 0.4373×W + 875.34

[0031] Where:

[0032] Y set : Set value of the Y axis position of the coding machine, unit: mm

[0033] Z set : Set value of the Z axis position of the coding machine, unit: mm

[0034] X set : Set value of the X axis position of the coding machine, unit: mm

[0035] D: Coil diameter of the aluminum coil to be coded

[0036] W: Width of the aluminum coil to be coded

[0037] After receiving the diameter and width information of the next aluminum coil in the controller program, the set coordinate positions of X, Y, and Z are automatically calculated using the above formulas, and then the coding laser emitting head is moved to the set coordinate positions. When the aluminum coil reaches the coding position, the coding laser emitting head starts printing.

[0038] The present invention calculates and positions the printing positions of the X, Y, and Z axes in advance by collecting and calculating the specifications of the aluminum coil, including the diameter and width of the aluminum coil, and starts laser coding immediately when the coil transport vehicle transports the aluminum coil to the coding position. Since the printing position positioning is completed in advance, this method eliminates the three-axis positioning process and does not require a laser distance sensor, effectively improving the printing efficiency and success rate. Description of the Drawings:

[0039] The present invention will be further described below with reference to the accompanying drawings;

[0040] Figure 1 is a schematic structural diagram of the present invention;

[0041] Figure 2 is a side view schematic structural diagram of the coil transport vehicle and the three-axis positioning transmission mechanism;

[0042] Figure 3 is a front view schematic structural diagram of the fixing frame and the three-axis positioning transmission mechanism;

[0043] Figure 4 is a relationship diagram between the position of the coding laser emitter on the Y axis and the diameter of the aluminum coil;

[0044] Figure 5 is a relationship diagram between the position of the coding laser emitter on the Z axis and the diameter of the aluminum coil;

[0045] Figure 6 is a relationship diagram between the position of the coding laser emitter on the X axis and the width of the aluminum coil;

[0046] Figure 7 is a block diagram of the circuit working principle of the present invention. Detailed Embodiment:

[0047] The present invention will be further described below with reference to the accompanying drawings and detailed embodiments.

[0048] The surface laser coding device for aluminum coils output by the hot finishing mill of the present invention includes a deflection roller 2 provided at the output end of the hot finishing mill 1 for guiding the aluminum strip and a coiler 3 for winding the aluminum strip to form an aluminum coil A. The deflection roller 2 and the coiler 3 are respectively driven to rotate by a driving motor.

[0049] A guide rail 4 is provided below the coiler along its axial direction and a coil transport vehicle 5 is provided on the guide rail. The coil transport vehicle 5 can move along the transmission direction of the guide rail. The coil transport vehicle 5 can be provided with a lifting mechanism so that after the coil transport vehicle 5 and the lifting mechanism thereon move to 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, during the movement of the coil transport vehicle 5 along the guide rail, the aluminum coil is separated from the coiler 3.

[0050] On the side of the guide rail 4 in its length direction and away from the coiler (such as at a position 1 - 5 meters away), there is a fixed frame 6 and a three-axis positioning drive mechanism 8 installed on the fixed frame 6 and driven by a controller 7. A coding laser emitter 9 is installed on the three-axis positioning drive mechanism.

[0051] The three-axis positioning drive mechanism 8 includes three motors respectively controlled by the controller and a Y-axis moving frame 81, an X-axis moving frame 82, and a Z-axis moving frame 83 respectively driven by the three motors. The coding laser emitter 9 is installed on the Z-axis moving frame 83. Of course, not only the coding laser emitter 9 is installed on the Z-axis moving frame 83, but also a coder is provided to trigger the coding laser emitter 9 to work. The coder is electrically connected to the controller. After the coding laser emitter 9 moves into place, the controller triggers the coder to work, and the coding laser emitter 9 codes on the surface of the aluminum coil.

[0052] Specifically, the three motors respectively drive the Y-axis moving frame, the X-axis moving frame, and the Z-axis moving frame through screw-nut mechanisms; of course, the three motors and the three sets of screw-nut mechanisms can be linear motors or electric push cylinders respectively integrated into one body, and the movement and positioning of the coding laser emitter 9 at three coordinate positions can be achieved through them.

[0053] To prevent impact on the aluminum coil, an anti-collision travel switch 10 installed on the Z-axis moving frame is electrically connected to the controller 7. The anti-collision travel switch 10 is a commercially available component, and its working principle, etc. will not be elaborated here. Through the anti-collision travel switch 10, it is possible to avoid accidental collision between the three-axis positioning drive mechanism 8 controlled by the controller 7 and the aluminum coil.

[0054] 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 deflector roll to detect the rotational speed of the drive motor; the host computer 11 is electrically connected to the encoder 13 of the motor of the coiler to detect the rotational speed of the motor of the coiler.

[0055] In the figure, A1 is the coding position for small-diameter aluminum coils, and A2 is the coding position for large-diameter aluminum coils.

[0056] The specific algorithms and control methods of the controller are as follows:

[0057] The calculation method of the diameter of the aluminum coil is as follows: The aluminum strip produced by the rolling mill (hot finishing mill) passes through the deflector roll at the outlet of the rolling mill and is wound into an aluminum coil by the coiler. Its operation process is as Figure 1 shown. An encoder is installed on the motor of the deflector roll to detect the motor rotational speed n p , and the linear velocity v of the deflector roll can be calculated based on the gear ratio of the speed reducer and the diameter of the deflector roll p ; an encoder is also installed on the coiler motor to detect the rotational speed n of the coiler j, but since the diameter of the aluminum coil on the coiler continuously increases during the production process, it is impossible to directly calculate the linear velocity v of the aluminum coil on the coiler. j ; and the linear velocity of the aluminum coil on the coiler is equal to the linear velocity of the deflector roll. Therefore, the diameter of the aluminum coil on the coiler at this time can be calculated using the conversion formula for the rotational speed and linear velocity of the coiler.

[0058] The following formula can be listed from the above:

[0059]

[0060] Therefore:

[0061]

[0062] Among them:

[0063] v j - Linear velocity of the coiler, unit: m / s

[0064] v p - Linear velocity of the deflector roll, unit: m / s, measured by the encoder

[0065] n j - Rotational speed of the coiler, unit: r / min, measured by the encoder

[0066] D - Diameter of the aluminum coil, unit: m

[0067] P - Reduction ratio of the coiler gearbox, fixed value 5.5;

[0068] Using the above formula, the coil diameter of the aluminum coil can be calculated. The width information of the aluminum coil can be measured by the convexity meter at the outlet of the hot finishing mill (the convexity meter is an existing device that can measure the width of the aluminum coil, and the specific working principle will not be elaborated here). Finally, these specification information (the coil diameter and width information of the aluminum coil) are sent to the controller.

[0069] In the controller firmware, substituting the values of the linear velocity v of the coiler j , the linear velocity v of the deflector roll p , the rotational speed n of the coiler j and the reduction ratio P of the coiler gearbox into the formula to calculate the coil diameter value of the aluminum coil is a commonly used technology in the field of mechatronic control and will not be elaborated here.

[0070] Since the focal length of the coding laser emitter 9 is a fixed value, the set positions of its Y and Z axes are only related to the diameter of the aluminum coil, and the set value position of the X axis is only related to the width of the aluminum coil; after manually operating the three axes on-site to code the aluminum coil and collecting the positions of the Y, Z, and X axes during normal coding of aluminum coils with different coil diameters and widths, the following relational expressions can be obtained:

[0071] Table 1 - Actual positions of the X\Y\Z axes corresponding to aluminum coils with different coil diameters and widths during normal coding

[0072]

[0073] Through Figures 4 - 6 the relationship diagram, it can be obtained that:

[0074] Y set = -0.5052×D + 1532.7

[0075] Z set = 0.5165×D - 799.33

[0076] X set = -0.4373×W + 875.34

[0077] wherein:

[0078] Y set : The set value of the Y-axis position of the coding machine, unit: mm

[0079] Z set : The set value of the Z-axis position of the coding machine, unit: mm

[0080] X set : The set value of the X-axis position of the coding machine, unit: mm

[0081] D: The coil diameter of the aluminum coil to be coded

[0082] W: The width of the aluminum coil to be coded.

[0083] In the controller hardware, substituting the coil diameter and width of the aluminum coil into the formula to calculate the X, Y, and Z coordinate values is a commonly used technique in the field of mechatronics control, which will not be elaborated here.

[0084] After the controller receives the information of the coil diameter and width of the next aluminum coil, it automatically calculates the set positions of X, Y, and Z using the above formulas, and then controls the three-axis positioning drive mechanism through the controller to move the coding laser emitter 9 to the set positions. When the aluminum coil reaches the coding position, the coding 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.

[0085] In order to enable the coding machine to automatically calculate and position, this embodiment adopts the following control method through programming, which specifically includes the following steps:

[0086] Step S1: After the production of the aluminum coil by the hot finishing mill is completed, send the coil diameter of the aluminum coil and the measured width signal of the aluminum coil to the controller;

[0087] Step S2: According to the coil diameter and width information, calculate the set coordinates of the X, Y, and Z axes of the coding laser emitter required, and control the X, Y, and Z axes of the coding laser emitter to move to the set coordinate positions by the controller;

[0088] Step S3: The coil transport vehicle moves the aluminum coil wound by the coiler to the coding position in front of the fixed frame beside the guide rail;

[0089] Step S4: The coding laser emitting head starts printing and prints the aluminum coil information at the middle position of the outer circle of the aluminum coil;

[0090] Step S5: After the coding laser emitting head finishes printing, it is controlled by the controller to return to the original position;

[0091] Step S6: The coil transport vehicle transports the coded aluminum coil to the aluminum coil storage area.

[0092] In this application, by calculating the coil diameter of the finished aluminum coil and sending the aluminum coil specifications (diameter and width information) to the controller, the three-axis coordinates of the coding laser emitting head are calculated in advance, saving the positioning time of the traditional coding machine. At the same time, without a laser distance sensor, the operation efficiency and success rate of the marking machine can be effectively improved.

[0093] The above are only the preferred embodiments of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solutions of the present invention, they should all be covered by the scope of the technical solutions claimed by the present invention.

Claims

1. A laser coding device for the surface of aluminum coils output by a hot finishing mill, characterized in that: It includes a deflector roll arranged at the output end of a hot finishing mill for guiding an aluminum strip and a coiler for winding the aluminum strip into an aluminum coil. Below the coiler, there is a guide rail arranged along its axial direction and a coil transporter arranged on the guide rail. On the side of the guide rail far from the coiler, there is a fixed frame and a three-axis positioning drive mechanism driven by a controller and arranged on the fixed frame. A coding laser emitter is installed on the three-axis positioning drive mechanism.

2. The surface laser coding device for aluminum coils output by the hot finishing mill according to claim 1, characterized in that: The three-axis positioning drive mechanism includes three motors respectively controlled by the controller and a Y-axis moving frame, an X-axis moving frame, and a Z-axis moving frame respectively driven by the three motors. The coding laser emitter is installed on the Z-axis moving frame.

3. The surface laser coding device for aluminum coils output by the hot rolling mill according to claim 1 or 2, characterized in that: The controller is electrically connected to an anti-collision travel switch installed on the Z-axis moving frame.

4. The surface laser coding device for aluminum coils output by the hot finishing mill according to claim 3, wherein: The controller is electrically connected to a host computer. The host computer is electrically connected to the encoder of the drive motor of the deflector roll to detect the rotation speed of the drive motor; the host computer is electrically connected to the encoder of the motor of the coiler to detect the rotation speed of the motor of the coiler.

5. The surface laser coding device for aluminum coiled materials output by the hot finishing mill according to claim 4, characterized in that: The three motors respectively drive the Y-axis moving frame, the X-axis moving frame, and the Z-axis moving frame to act through screw-nut mechanisms.

6. A working method of a laser marking device on the surface of an aluminum coil output by a hot finishing mill as described in any one of claims 1-5, characterized in that, It includes the following steps: Step S1: After the production of the aluminum coil by the hot finishing mill is completed, the coil diameter of the aluminum coil and the width signal of the measured aluminum coil are sent to the controller. Step S2: According to the coil diameter and width information, calculate the set coordinates of the X, Y, and Z axes of the required coding laser emitter, and control the X, Y, and Z axes of the coding laser emitter to move to the set coordinate positions by the controller. Step S3: The coil transporter moves the aluminum coil wound by the coiler to the coding position in front of the fixed frame beside the guide rail. Step S4: The coding laser emitter starts printing and prints the aluminum coil information to the middle position of the outer circle of the aluminum coil. Step S5: After the coding laser emitter finishes printing, it is controlled by the controller to return to the original position. Step S6: The coil transporter transports the coded aluminum coil to the aluminum coil storage area.

7. The working method of the laser marking device on the surface of the aluminum coil output by the hot rolling mill according to claim 6, characterized in that, The algorithm and control method of the controller are as follows: The diameter of the aluminum coil output by the hot rolling mill and coiled by the coiler is calculated as follows: The aluminum strip produced by the hot rolling mill passes through the deflector roll at the outlet of the hot rolling mill and is coiled into an aluminum coil by the coiler. An encoder is installed on the motor of the deflector roll to detect the motor speed n p , and the linear velocity v of the deflector roll can be calculated based on the gear ratio of the reducer and the diameter of the deflector roll p ; An encoder is installed on the motor of the coiler to detect the speed n of the coiler j , during the production process, the diameter of the aluminum coil on the coiler is constantly increasing, and it is impossible to directly calculate the linear velocity v of the aluminum coil on the coiler j ; and the linear velocity of the aluminum coil on the coiler is equal to the linear velocity of the deflector roll; use the conversion formula of the coiler speed and linear velocity to calculate the diameter of the aluminum coil on the coiler at this time; that is, the formula: Therefore: Wherein: v j - Coiling machine linear speed unit: m / s v p - The linear velocity unit of the deflection roller is m / s, which is measured by the encoder. n j - The coiler rotation speed unit r / min is measured by an encoder D - Coil diameter of the aluminum coil, unit m P - Reduction ratio of the coiler gearbox, fixed value 5.5; The coil diameter of the aluminum coil is calculated by the above formula. The width information of the aluminum coil is measured by a crown meter at the outlet of the hot finishing mill. The coil diameter and width information of the aluminum coil are sent to the controller.

8. The working method of the laser coding device on the surface of the aluminum coil material output by the hot finishing mill according to claim 7, characterized in that The set positions of the Y and Z axes of the coding laser emitter are related to the diameter of the aluminum coil, and the set value position of the X axis is related to the width of the aluminum coil; the relationships between the positions of the Y, Z, and X axes and the diameter and width of the aluminum coil are: Y set = -0.5052×D + 1532.7 Z set = 0.5165 × D - 799.33 X set = -0.4373×W + 875.34 Wherein: Y set : The unit of the set value of the Y-axis position of the coder is mm Z set : Set value of the Z-axis position of the coder, unit: mm X set : Set value of the X-axis position of the coder, unit: mm D: Coil diameter of the aluminum coil to be coded W: Width of the aluminum coil to be coded; After receiving the next coil diameter and width information in the controller program, automatically calculate the set coordinate positions of X, Y, and Z by using the above formula, and then move the coding laser emitter to the set coordinate positions; when the aluminum coil reaches the coding position, the coding laser emitter starts printing.

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