Plate edge position automatic measuring method and plate edge measuring system

Abstract

The invention relates to the technical field of spiral welded pipe production, in particular to a plate edge position automatic measuring method and a plate edge measuring system, and aims to solve the problems of high labor intensity of operators, low production efficiency and incapability of ensuring the butt operation quality in an unwinding butt position in an existing spiral welded pipe production process. The invention provides a method for automatically measuring the position of a plate edge, the position of a plate head before leveling is L1, the calibration value before leveling is L2, the position difference value before leveling is L3, and L3 = L1-L2; the plate head position before plate shearing is L4, the calibration value before plate shearing is L5, the position difference value before plate shearing is L6, and L6 = L4-L5; the vertical roll displacement value L7 is equal to L6-L3, the vertical roll motor is controlled to act according to the vertical roll displacement value after logical operation processing is conducted through the PLC control system in combination with the parameters, when L6-L3 is negative, the vertical roll moves in the first direction, when L6-L3 is positive, the vertical roll moves in the second direction, when L7 is smaller than L8, the vertical roll stops acting, L8 is a set reference value, and the value of L7 tends to zero.

Description

Technical Field

[0001] The invention relates to the technical field of spiral welded pipe production, and in particular to an automatic plate edge position measurement method and a plate edge measurement system. Background Art

[0002] The production of spiral welded pipes requires processes such as unwinding, leveling, and shearing. At present, at least two operators are required to work in the leveling and shearing processes. The existing operation method is that one of the two operators needs to control the steel plate to move forward and backward, and the other uses a tape measure to measure the difference between the head and tail of the plate before leveling and shearing, and controls the position of the tail of the plate by manually operating the vertical roller to make the plate edges of the head and tail of the plate in the same straight line before shearing. The manually measured values ​​are not accurate enough, the preparatory work before the head is cumbersome, and an efficient process control system has not been formed.

[0003] Therefore, the labor intensity of operators is high, the production efficiency is low, and the butt welding position cannot guarantee the quality of the butt welding operation. Summary of the invention

[0004] The purpose of the present invention is to provide a plate edge position automatic measurement method and plate edge measurement system to solve the problems of high labor intensity and low production efficiency of operators in the unwinding and butt welding post in the existing spiral welded pipe production process, and the inability to guarantee the butt welding operation quality.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] In a first aspect, the present invention provides a method for automatically measuring the edge position of a plate, using a plate edge measurement system, wherein the plate edge measurement system is provided before leveling and before shearing, and the plate edge measurement system comprises a laser measurement device and a PLC control system;

[0007] The laser measuring device is provided with a laser length measuring sensor and a mechanical support wheel, the mechanical support wheel is in contact with the edge of the steel plate, and the laser length measuring sensor emits a laser point to the mechanical support wheel;

[0008] In the automatic control mode, the position of the plate head before leveling is L1, L1 is the distance between the laser point of the laser length measuring sensor and the mechanical wheel before leveling, L1 is the measured known value, the calibration value before leveling is L2, L2 is the set known value, and the position difference before leveling is L3, then L3 = L1-L2;

[0009] The position of the plate head before shearing is L4, L4 is the distance between the laser point of the laser length measuring sensor before shearing and the mechanical wheel, L4 is the measured known value, the calibration value before shearing is L5, L5 is the set known value, the position difference before shearing is L6, then L6 = L4-L5;

[0010] The vertical roller is connected to the steel plate and is used to adjust the position of the edge of the steel plate. The vertical roller motor drives the vertical roller to move. The vertical roller displacement value is L7, L7=|L6-L3|. The vertical roller motor is controlled according to the vertical roller displacement value after the above parameters are processed by the PLC control system logic operation. When L6-L3 is negative, the vertical roller moves in the first direction and drives the steel plate to move in the first direction. When L6-L3 is positive, the vertical roller moves in the second direction and drives the steel plate to move in the second direction. When L7<L8, the vertical roller stops moving. L8 is the set reference value, so that the value of L7 tends to zero.

[0011] Furthermore, the Profibus DP distributed master-slave control mode is adopted, with Siemens S7-300PLC as the master station, and the slave stations are the vertical roller control system and the touch screen system. The vertical roller control system is used to control the vertical roller, and the touch screen system is used to set data and display real-time data.

[0012] Furthermore, the PLC master station and the slave station adopt the Profibus DP communication mode.

[0013] Furthermore, the vertical roller control system is a Siemens MM440 controller.

[0014] In a second aspect, the present invention provides a board edge measurement system based on the board edge position automatic measurement method, the board edge measurement system further comprising a floating device and a data acquisition module;

[0015] The floating device is connected to the mechanical support wheel, and the floating device can drive the mechanical support wheel to move, so that the mechanical support wheel and the edge of the steel plate move synchronously;

[0016] The laser length measurement sensor is electrically connected to the data acquisition module.

[0017] Further, the floating device includes a floating guide cylinder;

[0018] The laser length measuring sensor is fixed above the floating guide cylinder, and the mechanical wheel is connected to the output end of the floating guide cylinder;

[0019] A flat plate is arranged on the mechanical wheel, and the laser length measuring sensor emits a laser point to illuminate the flat plate, and the flat plate is a white flat plate.

[0020] Furthermore, the plate edge measurement system also includes a touch screen system and a vertical roller control system;

[0021] The touch screen system is electrically connected to the PLC control system;

[0022] The vertical roller control system is electrically connected to the PLC control system.

[0023] Further, the plate edge measurement system also includes a fixing plate;

[0024] The fixing plate is arranged on the side of the steel plate, and the floating guide cylinder is connected to the fixing plate.

[0025] Furthermore, the board edge measurement system also includes a main bracket;

[0026] The main support is configured as a cross-shaped support, and the main support is provided with a horizontal plate and a vertical plate, the vertical plate is vertically arranged, and the horizontal plate is perpendicular to the vertical plate;

[0027] The fixed plate is slidably connected to the transverse plate;

[0028] The horizontal plate is slidably connected to the vertical plate.

[0029] Furthermore, the transverse plate is provided with a first long slot along its length direction, the fixed plate is provided with a first sliding block, and the first sliding block extends into the first long slot;

[0030] The vertical plate is provided with a second long groove along its length direction, and the horizontal plate is provided with a second sliding block, which extends into the second long groove.

[0031] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0032] The present invention obtains the real-time position of the edge of the steel plate through program logic operation, and the system automatically adjusts the position of the steel plate according to the operation result, so that the displacement value of the vertical roller L7 tends to zero, thereby realizing the automation of steel plate position adjustment at the decoiling and butting position, so that the personnel at the position can independently operate and control the steel plate to a suitable position for shearing and cutting, and realizes that a single person can complete the work that was originally completed by two people, thereby reducing the labor intensity of the personnel at the position, improving the production efficiency and the quality of steel pipe welding, and at the same time ensuring the high quality and high standards of the butt welding position, providing production guarantee for improving the quality of subsequent processes, and solving the problems of high labor intensity and low production efficiency of the operators at the decoiling and butting position in the existing spiral welded pipe production process, and the inability of the butt welding position to ensure the operation quality of the butt welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1A structural diagram of a board edge measurement system provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of a board edge measurement system provided in an embodiment of the present invention.

[0036] Icons: 1-laser length measuring sensor; 2-mechanical support wheel; 3-floating guide cylinder; 4-fixed plate; 41-first slider; 5-main bracket; 51-horizontal plate; 51a-second slider; 52-vertical plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] In the existing spiral welded pipe production process, the labor intensity of operators at the coil unwinding and butt welding post is high, the production efficiency is low, and the butt welding post cannot guarantee the quality of the butt welding operation.

[0041] In view of this, the present invention provides an automatic plate edge position measurement method, using a plate edge measurement system, the plate edge measurement system is provided before leveling and before shearing, the plate edge measurement system includes a laser measuring device and a PLC control system; the laser measuring device is provided with a laser length measuring sensor 1 and a mechanical support wheel 2, the mechanical support wheel 2 is in contact with the edge of the steel plate, and the laser length measuring sensor 1 emits a laser point to the mechanical support wheel 2; in the automatic control mode, the plate head position before leveling is L1, L1 is the distance from the laser point emission point of the laser length measuring sensor 1 before leveling to the mechanical support wheel 2, L1 is a measured known value, the calibration value before leveling is L2, L2 is a set known value, the position difference before leveling is L3, then L3=L1-L2; the plate head position before shearing is L4, L4 is the laser length measuring sensor before shearing The distance between the laser point of device 1 and the mechanical wheel 2, L4 is the measured known value, the calibration value before shearing is L5, L5 is the set known value, the position difference before shearing is L6, then L6=L4-L5; the vertical roller is connected to the steel plate, and the vertical roller motor drives the vertical roller to move, which is used to adjust the position of the edge of the steel plate. The vertical roller displacement value is L7, L7=|L6-L3|. Combined with the above parameters, after logical operation and processing by the PLC control system, the vertical roller motor is controlled according to the vertical roller displacement value. When L6-L3 is negative, the vertical roller moves in the first direction and drives the steel plate to move in the first direction. When L6-L3 is positive, the vertical roller moves in the second direction and drives the steel plate to move in the second direction. When L7<L8, the vertical roller stops moving. L8 is the set reference value, so that the value of L7 tends to zero.

[0042] The present invention obtains the real-time position of the edge of the steel plate through program logic operation, and the system automatically adjusts the position of the steel plate according to the operation result, so that the displacement value of the vertical roller L7 tends to zero, thereby realizing the automation of steel plate position adjustment at the decoiling and butting position, so that the personnel at the position can independently operate and control the steel plate to a suitable position for shearing and cutting, and realizes that a single person can complete the work that was originally completed by two people, thereby reducing the labor intensity of the personnel at the position, improving the production efficiency and the quality of steel pipe welding, and at the same time ensuring the high quality and high standards of the butt welding position, providing production guarantee for improving the quality of subsequent processes, and solving the problems of high labor intensity and low production efficiency of the operators at the decoiling and butting position in the existing spiral welded pipe production process, and the inability of the butt welding position to ensure the operation quality of the butt welding.

[0043] The board edge position automatic measurement method provided in this embodiment uses a board edge measurement system. Figure 1 and Figure 2 The structure and shape of the board edge measurement system are described in detail.

[0044] Reference Figure 1 and Figure 2 ,The board edge measurement system includes a laser measuring device, a floating device, a data acquisition module and a PLC control system.

[0045] The laser measuring device is provided with a laser length measuring sensor 1 and a mechanical support wheel 2. The mechanical support wheel 2 is in contact with the edge of the steel plate, and the laser length measuring sensor 1 emits a laser point to the mechanical support wheel 2. The floating device is connected to the mechanical support wheel 2, and the floating device can drive the mechanical support wheel 2 to move so that the mechanical support wheel 2 moves synchronously with the edge of the steel plate.

[0046] In an optional embodiment, the floating device includes a floating guide cylinder 3, a laser length measuring sensor 1 is fixed above the floating guide cylinder 3, and a mechanical support wheel 2 is connected to the output end of the floating guide cylinder 3. The mechanical support wheel 2 is controlled by the extension and contraction of the floating guide cylinder 3 to contact the edge of the steel plate to be measured, and the laser point emitted by the laser length measuring sensor 1 is irradiated on the flat plate of the mechanical support wheel 2, so that the real-time length value of the extended floating guide cylinder 3 can be accurately collected. The setting of the flat plate can improve the stability of the device measurement; wherein, in order to ensure the accuracy of the measurement, the color of the flat plate set on the mechanical support wheel 2 is white.

[0047] In an optional implementation, the present embodiment is further provided with a fixed plate 4 and a main bracket 5. The plate edge measurement system is divided into two sets, which are respectively fixed before leveling and before shearing. The floating guide cylinder 3 is fixed to the main bracket 5 through the fixed plate 4. The fixed plate 4 is arranged on the side of the steel plate, and the floating guide cylinder 3 is connected to the fixed plate 4. The main bracket 5 is arranged as a cross-shaped bracket, and the main bracket 5 is provided with a horizontal plate 51 and a vertical plate 52. The vertical plate 52 is arranged vertically, and the horizontal plate 51 is perpendicular to the vertical plate 52; the fixed plate 4 is slidably connected to the horizontal plate 51; and the horizontal plate 51 is slidably connected to the vertical plate 52.

[0048] In an optional embodiment, the horizontal plate 51 is provided with a first long groove along its length direction, and a first slider 41 is provided on the fixed plate 4. The first slider 41 extends into the first long groove, and the first slider 41 can slide in the first long groove so that the laser measuring device can move laterally; the vertical plate 52 is provided with a second long groove along its length direction, and a second slider 51a is provided on the horizontal plate 51. The second slider 51a extends into the second long groove so that the laser measuring device can move vertically.

[0049] Specifically, the horizontal plate 51 and the vertical plate are provided with adjusting long grooves, and the laser measuring device can be adjusted horizontally and vertically to meet the requirements of the edge distance measurement of steel plates of different specifications.

[0050] In an optional embodiment, the laser length measurement sensor 1 is electrically connected to a data acquisition module. Specifically, the data acquisition module includes an analog input module 331; the data acquisition module is electrically connected to a PLC control system.

[0051] In an optional implementation manner, the present embodiment further includes a touch screen system and a vertical roller control system; the touch screen system is electrically connected to the PLC control system, and the vertical roller control system is electrically connected to the PLC control system.

[0052] The control principle involved in this embodiment is as follows:

[0053] Before shearing and leveling, a set of plate edge measurement system is installed respectively, and the floating guide cylinder 3 is horizontally placed on the main bracket 5 through the fixed plate 4. The laser length measurement sensor 1 is fixed above the floating guide cylinder 3, and the mechanical support wheel 2 is fixed in front of the floating guide cylinder 3. The floating guide cylinder 3 realizes the synchronous follow-up of the top wheel and the edge of the steel plate. The laser length measurement sensor 1 emits a laser point to illuminate the flat plate of the mechanical support wheel 2, so as to collect the real-time length value of the floating guide cylinder 3. The analog input module transmits the collected sensor signal to the CPU module. The collected signal is converted and logically operated by the PLC system. The result of the operation controls the vertical roller motor to adjust the direction of the vertical roller action in real time, so as to realize the automatic adjustment of the plate edge position.

[0054] In the automatic control mode, assume that the plate head position before leveling is L1 (measured known value), the calibration value before leveling is L2 (set known value), and the position difference before leveling is L3, then L3 = L1-L2, the plate head position before shearing is L4 (measured known value), the calibration value before shearing is L5 (set known value), and the position difference before shearing is L6, then L6 = L4-L5. Then the vertical roller displacement value L7 = |L6-L3|, combined with the above parameters, after the PLC control system logic operation processing, the vertical roller motor action is controlled according to the vertical roller displacement value. When L6-L3 is negative, the vertical roller moves in the first direction and drives the steel plate to move in the first direction, that is, to the south; when L6-L3 is positive, the vertical roller moves in the second direction and drives the steel plate to move in the second direction, that is, to the north. When L7 < L8, the vertical roller stops moving, and L8 is a set reference value, so that the value of L7 tends to zero.

[0055] Among them, the plate edge measurement system set before shearing and the plate edge measurement system before leveling are both set on the north-facing side of the steel plate, that is, the mechanical wheel is in close contact with the plate edge of the steel plate on the north-facing side; in this embodiment, the steel plate is transported from west to east, and the first direction and the second direction in this embodiment are north-south directions. Specifically, the first direction is the direction of moving southward, and the second direction is the direction of moving northward; the moving direction of the vertical roller is the north-south direction, which can drive the steel plate to move in the north-south direction.

[0056] This embodiment adopts the Profibus DP distributed master-slave control mode, with Siemens S7-300PLC as the master station, which mainly completes sensor signal acquisition, data processing (real-time data of laser measuring device, motion control signal of vertical roller) and control of actuator; the slave station is Siemens MM440 controller and touch screen system. The controller mainly completes the motion control of vertical roller, and the speed of vertical roller motion is adjustable, which can be set on the touch screen. The touch screen system mainly completes the setting of calibration value, display of plate edge position, setting of vertical roller speed, display of operation status and alarm information. The PLC master station and the slave station adopt the Profibus DP communication mode. In the software programming, the asynchronous fault interrupt organization block is added to the communication failure with the substation, which will not cause the PLC to shut down, ensuring the normal operation of the system. In the hardware, communication lines and communication plugs with stronger anti-interference ability are used. The wiring of the communication plug must be standardized and meet the requirements. The shielding layer of the communication line must be crimped to the ground terminal. The communication line and the power line are arranged separately to avoid interference with the communication line.

[0057] The PLC control system consists of a CPU module, a digital input module 321, a digital output module 322, an analog input module 331, and a Siemens MM440 controller (slave station), and is mainly used to complete the collection and calculation of sensor data, and the movement and speed control of the vertical rollers.

[0058] This embodiment uses a laser length measuring sensor in combination with a floating device connected to the edge of the steel plate to detect the real-time position of the edge of the plate. The measured data is calculated by the PLC system. The result of the calculation controls the movement direction and speed of the vertical roller through a variable frequency speed regulation device, thereby realizing automatic adjustment of the position of the steel plate before shearing.

[0059] This embodiment adopts a laser length measuring sensor 1 to ensure the accuracy and stability of the collected data; a floating guide cylinder 3 is used to adjust the position of the supporting wheel in real time according to the width of the edge of the steel plate, so that the supporting wheel is in close contact with the edge of the steel plate in real time.

[0060] This embodiment is applied to the spiral welded pipe uncoiling and butting process. It can measure in real time during the operation, automatically control the position of the steel plate edge before leveling and shearing, realize the automation of steel plate position adjustment at the uncoiling and butting post, and enable the post personnel to independently control the steel plate to the appropriate position for shearing and cutting, thereby reducing the labor intensity of the post personnel, improving production efficiency, realizing post optimization, and ensuring the high quality and high standards of the butt welding post.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically measuring the edge position of a board, characterized in that: Use a plate edge measurement system, which is set before leveling and before shearing. The plate edge measurement system includes a laser measurement device and a PLC control system; The laser measuring device is provided with a laser length measuring sensor and a mechanical support wheel, the mechanical support wheel is in contact with the edge of the steel plate, and the laser length measuring sensor emits a laser point to the mechanical support wheel; In the automatic control mode, the position of the plate head before leveling is L1, L1 is the distance between the laser point of the laser length measuring sensor and the mechanical wheel before leveling, L1 is the measured known value, the calibration value before leveling is L2, L2 is the set known value, and the position difference before leveling is L3, then L3 = L1-L2; The position of the plate head before shearing is L4, L4 is the distance between the laser point of the laser length measuring sensor before shearing and the mechanical wheel, L4 is the measured known value, the calibration value before shearing is L5, L5 is the set known value, the position difference before shearing is L6, then L6 = L4-L5; The vertical roller is connected to the steel plate and is used to adjust the position of the edge of the steel plate. The vertical roller motor drives the vertical roller to move. The vertical roller displacement value is L7, L7=|L6-L3|. The vertical roller motor is controlled according to the vertical roller displacement value after the above parameters are processed by the PLC control system logic operation. When L6-L3 is negative, the vertical roller moves in the first direction and drives the steel plate to move in the first direction. When L6-L3 is positive, the vertical roller moves in the second direction and drives the steel plate to move in the second direction. When L7<L8, the vertical roller stops moving. L8 is the set reference value, so that the value of L7 tends to zero.

2. The method for automatically measuring the edge position of a board according to claim 1, characterized in that: The Profibus DP distributed master-slave control mode is adopted, with Siemens S7-300PLC as the master station, and the slave stations are the vertical roller control system and touch screen system. The vertical roller control system is used to control the vertical roller, and the touch screen system is used to set data and display real-time data.

3. The method for automatically measuring the edge position of a board according to claim 2, characterized in that: The PLC master station and slave stations use Profibus DP communication method.

4. The method for automatically measuring the edge position of a board according to claim 2, characterized in that: The vertical roller control system is a Siemens MM440 controller.

5. A board edge measurement system based on the board edge position automatic measurement method according to any one of claims 1 to 4, characterized in that: The board edge measurement system also includes a floating device and a data acquisition module; The floating device is connected to the mechanical support wheel, and the floating device can drive the mechanical support wheel to move, so that the mechanical support wheel and the edge of the steel plate move synchronously; The laser length measurement sensor is electrically connected to the data acquisition module.

6. The board edge measurement system according to claim 5, characterized in that: The floating device includes a floating guide cylinder; The laser length measuring sensor is fixed above the floating guide cylinder, and the mechanical wheel is connected to the output end of the floating guide cylinder; A flat plate is arranged on the mechanical wheel, and the laser length measuring sensor emits a laser point to illuminate the flat plate, and the flat plate is a white flat plate.

7. The board edge measurement system according to claim 5, characterized in that: It also includes a touch screen system and vertical roller control system; The touch screen system is electrically connected to the PLC control system; The vertical roller control system is electrically connected to the PLC control system.

8. The board edge measurement system according to claim 6, characterized in that: Also included is a fixing plate; The fixing plate is arranged on the side of the steel plate, and the floating guide cylinder is connected to the fixing plate.

9. The board edge measurement system according to claim 8, characterized in that: Also included is the main stand; The main support is configured as a cross-shaped support, and the main support is provided with a horizontal plate and a vertical plate, the vertical plate is vertically arranged, and the horizontal plate is perpendicular to the vertical plate; The fixed plate is slidably connected to the transverse plate; The horizontal plate is slidably connected to the vertical plate.

10. The board edge measurement system according to claim 9, characterized in that: The transverse plate is provided with a first long slot along its length direction, and the fixed plate is provided with a first sliding block, and the first sliding block extends into the first long slot; The vertical plate is provided with a second long groove along its length direction, and the horizontal plate is provided with a second sliding block, which extends into the second long groove.

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