A method for measuring the size of a universal rolling mill window using a laser tracker

Abstract

The invention discloses a method for measuring the size of a universal rolling mill window using a laser tracker, which is used for measuring the size of a universal rolling mill window. The laser tracker is used to measure the size of the universal rolling mill window, and a steel plate is set up between the operating side and the transmission side frames, and the laser tracker is placed for measurement. The invention solves the problem of difficulty in measuring a universal rolling mill, has high measurement efficiency, and has little impact on other maintenance work.

Description

Technical Field

[0001] The invention relates to the field of measurement, and in particular to a method for measuring the size of a universal rolling mill window by using a laser tracker. Background Art

[0002] The universal rolling mill has a special structure, and there are obstructions on its transmission side and operating side. The instruments set up from the outside cannot see through the windows of the rolling mill, resulting in the inability to complete the measurement of this type of rolling mill by setting up instruments from the outside. When the operating side and the transmission side are locked, the internal space is small. However, the operating side of this type of rolling mill can be pulled out along the track as a whole during maintenance, which brings great difficulties to the measurement of the rolling mill arch. When the rolling mill is in a locked state, the internal space is small and there is no instrument setting point. When the operating side is pulled out, it is difficult to find the overall center line of the operating side and the transmission side. This invention was made to solve the measurement problem of this rolling mill.

[0003] Comparative Data 1: A method for online detection of spatial position and dimension accuracy of cold rolling mill window

[0004] An online detection method for the spatial position dimension accuracy of a cold rolling mill window belongs to the spatial position dimension measurement of metallurgical equipment, and particularly relates to the spatial position dimension detection of a rolling mill window. The method is characterized in that the detection is carried out by using a laser detection device, and the following methods are used: station setting, detection and establishment of the geoid, rolling production center line, rolling mill window coordinate system origin, and rack window lining plate surface detection and opening dimension accuracy analysis. The advantages are that the method has a novel concept, convenient equipment operation, less personnel, and high efficiency, and can accurately detect the spatial opening dimension of the rolling mill window lining plate; the spatial dimension accuracy status of the cold rolling mill window can be intuitively understood, the spatial dimension accuracy operating status and deterioration trend of the equipment can be mastered, the rolling mill precision management work level can be improved, the requirements of the rapid production rhythm of cold rolling can be met, and the smooth rolling production can be ensured. This method cannot be used for universal rolling mill detection.

[0005] Comparative Data 2: A method for measuring PC mill window size using a laser tracker

[0006] The present invention relates to a method for measuring the size of a PC rolling mill window using a laser tracker, and belongs to the technical field of steel rolling equipment management methods. The technical scheme of the present invention is: calculating the distance from the measuring point to the reference plane; calculating the archway spacing and the liner spacing according to the point-to-plane functional vector property and the spatial position relationship, that is, according to the distance between the laser tracker target mirror and the plane base used and the spatial position relationship between the radius of the laser tracker and the measured object; and comparing and calculating with the design value to obtain the deviation of the archway window size. The beneficial effect of the present invention is: only using the laser tracker to take points on the archway reference point and the liner, through SA software simulation and formula calculation, the archway window size and deviation can be obtained, the accuracy can reach microns, and the measurement time only needs 1.5 hours, which is 2.5 hours shorter than the measurement time of the traditional method, so as to accurately and efficiently measure the mill archway window size. This method cannot be used for universal rolling mill detection.

[0007] Comparative Data 3: A method for assembling a six-high rolling mill and detecting assembly accuracy using a laser tracker

[0008] The present invention relates to the technical field of rolling mill equipment detection, and in particular to a method for assembling a six-roll rolling mill and detecting assembly accuracy using a laser tracker. Level rulers, level gauges, squares, feeler gauges, etc. are used to assemble and roughly adjust the positions on the mill bottom plate and frame assembly that need to be adjusted and measured, and the accuracy is within 0.05mm / m. A laser tracker with an accuracy of 0.001mm is used for data detection. A target ball is placed at each position that needs to be measured, and the laser emitted by the host is shot onto the target ball and returned to the host. The return beam is received by the detection system and is used to measure the spatial position of the target and obtain spatial coordinate data. The detection method combining the laser tracker and the traditional measurement method is used to perform data detection on the assembly of the six-roll rolling mill, and the assembly rolling mill is adjusted for accuracy based on the surveyed data to meet the various accuracy requirements of the final rolling mill assembly, realize rapid assembly of the rolling mill, and obtain high-quality rolling mill assembly accuracy that meets the design requirements. This method cannot be used for universal rolling mill detection. Summary of the invention

[0009] The purpose of the present invention is to provide a method for measuring the window size of a universal rolling mill using a laser tracker. The invention uses a method of placing a steel plate between the operating side and the transmission side frames to solve the problem that a laser tracker cannot be placed in the middle of the rolling mill for measurement.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0011] The present invention provides a method for measuring the size of a universal rolling mill window using a laser tracker, comprising the following steps:

[0012] Pull out the operating side frame of the rolling mill along the track and take out the rolls;

[0013] Place the steel plate between the operating side frame and the transmission side frame of the rolling mill; push the operating side frame of the rolling mill along the track and lock it;

[0014] Use an electric welder to firmly fix the steel plate to prevent its movement from causing micro-movement of the laser tracker;

[0015] Install the laser tracker between the operating side frame and the transmission side frame, roughly flatten the laser tracker and fix it firmly with a hot melt glue gun;

[0016] Calibrate and virtually level the laser tracker to establish the geoid;

[0017] Measure each reference surface and the rack window surface, and fit them into surfaces respectively;

[0018] Measure the coordinate values ​​of the reference points on the inlet and outlet sides, and connect the two points into a straight line as the rolling center line;

[0019] Using the transmission side reference surface to fit a transmission side mid-surface;

[0020] The average of all the measuring points of the transmission side inlet window is the transmission side inlet average point; the average of all the measuring points of the transmission side outlet window is the transmission side outlet average point; the transmission side inlet average point and the transmission side outlet average point are connected to form a transmission side straight line; the intersection of the transmission side straight line and the transmission side mid-plane is found as the transmission side midpoint;

[0021] Establish a coordinate system, the first element is the midpoint of the transmission side, the second element is the geoid, and the third element is the rolling center line; record the y coordinate values ​​of the centroid of the operation side window and the transmission side window;

[0022] The rack window accuracy is analyzed and evaluated based on the recorded coordinate values: opening distance and center deviation.

[0023] Further, the recording of the centroid y coordinate values ​​of the operation side window and the transmission side window specifically includes: recording the centroid y coordinate values ​​of the operation side upper support roller area inlet side window, the operation side lower support roller area inlet side window, the operation side upper support roller area outlet side window, and the operation side lower support roller area outlet side window are y 2.1 ,y 2.2 ,y 2.3 ,y 2.4 ; Record the centroid y coordinate values ​​of the window on the inlet side of the transmission side upper support roller area, the window on the inlet side of the transmission side lower support roller area, the window on the outlet side of the transmission side upper support roller area, and the window on the outlet side of the transmission side lower support roller area respectively. 2.5 ,y 2.6 ,y 2.7 ,y 2.8 .

[0024] Further, the analysis and evaluation of the rack window accuracy according to the coordinate system y value specifically includes:

[0025] ③ Calculation of opening distance a:

[0026] Window spacing of upper support roller area on the operating side: a1=||y 2.1 |+|y 2.3 ||

[0027] Window spacing of lower support roller area on the operating side: a2=||y 2.2 |+|y 2.4 ||

[0028] Window spacing of upper support roller area on the transmission side: a3=||y 2.5 |+|y 2.7 ||

[0029] Window spacing of lower support roller area on transmission side: a4=||y 2.6 |+|y 2.8 ||

[0030] ④ Calculation of center deviation d:

[0031] Center deviation of support roller area on the operating side: d1=|y 2.1 |-|y 2.3 |

[0032] Center deviation of lower support roller area on the operating side: d2=|y 2.2 |-|y 2.4 |

[0033] Center deviation of the support roller area on the transmission side: d3=|y 2.5 |-|y 2.7 |

[0034] Center deviation of lower support roller area on the transmission side: d4=|y 2.6 |-|y 2.8 |

[0035] Where: y 2.1 Centering of the inlet window in the support roller area on the operating side; 2.2 - Window on the entrance side of the lower support roller area on the operating side; 2.3 -Exit side window of the support roller area on the operating side; 2.4 - outlet side window in the area of ​​lower support rollers on the operating side; 2.5 - Window on the inlet side of the support roller area on the transmission side; 2.6 - Entrance side window of lower support roller area on the transmission side; 2.7 -Exit side window of the support roller area on the transmission side; 2.8 -Exit side window in the area of ​​the lower support roller on the transmission side.

[0036] Further: the steel plate is rectangular and its size must ensure that it can be smoothly placed between the operating side frame and the transmission side frame of the rolling mill, and can be stably placed on the steel beam. Its thickness is at least 20mm to ensure that the instrument is mounted on the steel plate without shaking. A lifting hook is provided on the steel plate to cooperate with the crane to smoothly place the steel plate between the operating side frame and the transmission side frame.

[0037] Compared with the prior art, the beneficial technical effects of the present invention are:

[0038] The invention solves the problem of difficult measurement of a universal rolling mill, has high measurement efficiency and little impact on other maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] Figure 1 A schematic diagram of equipment, tooling, and instruments for a method of measuring the size of a universal rolling mill window using a laser tracker;

[0041] Figure 2 Another schematic view of the apparatus, tooling, and instrumentation for a method of measuring the size of a universal mill window using a laser tracker;

[0042] Figure 3 A schematic diagram of a steel plate lifting hook for a method of measuring the size of a universal mill window using a laser tracker;

[0043] Figure 4 A side view of an operation of a method for measuring the size of a universal mill window using a laser tracker;

[0044] Figure 5 A transmission side view of a method for measuring the size of a universal mill window using a laser tracker;

[0045] Figure 6 A schematic diagram of measuring points for a method of measuring the size of a universal rolling mill window using a laser tracker;

[0046] Figure 7 A schematic diagram of operation-side data analysis of a method for measuring the window size of a universal rolling mill using a laser tracker;

[0047] Figure 8 A schematic diagram of transmission side data analysis of a method for measuring the window size of a universal rolling mill using a laser tracker;

[0048] Fig. 9 A schematic diagram of a top view of the reference point position of a method for measuring the size of a universal rolling mill window using a laser tracker;

[0049] Explanation of reference numerals: 1- rolling mill frame; 1.1- operating side frame; 1.2- transmission side frame; 2- frame window surface; 2.1- operating side upper support roller area inlet side window; 2.2- operating side lower support roller area inlet side window; 2.3- operating side upper support roller area outlet side window; 2.4- operating side lower support roller area outlet side window; 2.5- transmission side upper support roller area inlet side window; 2.6- transmission side lower support roller area inlet side window; 2.7- transmission side 1. Window on the exit side of the upper support roller area; 2.8 - Window on the exit side of the lower support roller area on the transmission side; 3 - Reference plane; 3.1 - Reference plane on the entry side of the upper support roller area on the transmission side; 3.2 - Reference plane on the entry side of the lower support roller area on the transmission side; 3.3 - Reference plane on the exit side of the upper support roller area on the transmission side; 3.4 - Reference plane on the exit side of the lower support roller area on the transmission side; 4 - Steel plate; 5 - Laser tracker; 6 - Lifting hook; 7 - Reference point; 7.1 - Reference point on the entry side; 7.2 - Reference point on the exit side. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1 , 2 , 3, 4, 5, 6, 7, 8, and 9 further describe the implementation of the technical solution in detail so as to more clearly describe the structure and working principle of the ground gate.

[0051] The present invention requires the manufacture of a steel plate 4, which is rectangular and has a size that can be smoothly placed between the operating side frame 1.1 and the transmission side frame 1.2 of the rolling mill, and can be stably placed on the steel beam. The thickness is at least 20 mm to ensure that the instrument is mounted on the steel plate without shaking. A lifting hook 6 is provided on the steel plate 4 to cooperate with a crane to smoothly place the steel plate 4 between the operating side frame 1.1 and the transmission side frame 1.2.

[0052] The specific implementation mode of the present invention is:

[0053] (1) Pull out the operating side frame 1.1 of the rolling mill along the track and take out the rolls;

[0054] (2) placing the steel plate 4 between the operating side frame 1.1 and the transmission side frame 1.2 of the rolling mill;

[0055] (3) Push the operating side frame 1.1 of the rolling mill along the track and lock it;

[0056] (4) Use an electric welder to firmly fix the steel plate 4 to prevent its movement from causing micro-movement of the laser tracker 5;

[0057] (5) Install the laser tracker 5 between the operating side frame 1.1 and the transmission side frame 1.2, roughly flatten the laser tracker 5, and use a hot melt glue gun to fix it firmly;

[0058] (6) calibrating and virtually leveling the laser tracker 5 to establish the geoid;

[0059] (7) Measure reference surface 3 (including 3.1, 3.2, 3.3, and 3.4) and fit them into surfaces. The number and order of measuring points are shown in Figure 4 ;

[0060] (8) Measure the rack window surface 2 (including 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7 and 2.8) and fit them into surfaces respectively. The number and order of measuring points are shown in Figure 4 ;

[0061] (9) Measure the coordinate values ​​of the inlet side reference point 7.1 and the outlet side reference point 7.2, and connect the two points into a straight line as the rolling center line.

[0062] (10) fitting a transmission side mid-surface using the transmission side upper support roller area inlet side reference surface 3.1, the transmission side lower support roller area inlet side reference surface 3.2, the transmission side upper support roller area outlet side reference surface 3.3 and the transmission side lower support roller area outlet side reference surface 3.4;

[0063] (11) The inlet side window 2.5 of the upper support roller area on the transmission side and the inlet side window 2.6 of the lower support roller area on the transmission side are averaged as the inlet average point of the transmission side; the outlet side window 2.7 of the upper support roller area on the transmission side and the outlet side window 2.8 of the lower support roller area on the transmission side are averaged as the outlet average point of the transmission side; the inlet average point of the transmission side and the outlet average point of the transmission side are connected to form a straight line on the transmission side; the intersection of the straight line on the transmission side and the middle surface of the transmission side is found as the midpoint of the transmission side;

[0064] (11) Establish a coordinate system, where the first element is the midpoint of the transmission side, the second element is the geoid, and the third element is the rolling centerline;

[0065] (12) Record the centroid y coordinate values ​​of window 2.1 on the entrance side of the upper support roller area on the operating side, window 2.2 on the entrance side of the lower support roller area on the operating side, window 2.3 on the exit side of the upper support roller area on the operating side, and window 2.4 on the exit side of the lower support roller area on the operating side. 2.1 ,y 2.2 ,y 2.3 ,y 2.4 ,like Figure 5 As shown; record the centroid y coordinate values ​​of the window 2.5 on the inlet side of the transmission side upper support roller area, the window 2.6 on the inlet side of the transmission side lower support roller area, the window 2.7 on the outlet side of the transmission side upper support roller area, and the window 2.8 on the outlet side of the transmission side lower support roller area, respectively. 2.5 ,y 2.6 ,y 2.7 ,y 2.8 ,like Figure 6 As shown;

[0066] (17) According to the y value of the coordinate system, the accuracy of the rack window is analyzed and evaluated:

[0067] ⑤ Calculation of opening distance a:

[0068] Window spacing of upper support roller area on the operating side: a1=||y 2.1 |+|y 2.3 ||

[0069] Window spacing of lower support roller area on the operating side: a2=||y 2.2 |+|y 2.4 ||

[0070] Window spacing of upper support roller area on the transmission side: a3=||y 2.5 |+|y 2.7 ||

[0071] Window spacing of lower support roller area on transmission side: a4=||y 2.6 |+|y 2.8 ||

[0072] ⑥ Calculation of center deviation d:

[0073] Center deviation of support roller area on the operating side: d1=|y 2.1 |-|y 2.3 |

[0074] Center deviation of lower support roller area on the operating side: d2=|y 2.2 |-|y 2.4 |

[0075] Center deviation of the support roller area on the transmission side: d3=|y 2.5 |-|y 2.7 |

[0076] Center deviation of lower support roller area on the transmission side: d4=|y 2.6 |-|y 2.8 |

[0077] Among them: y2.1 is the centering of the inlet side window of the upper support roller area on the operating side; 2.2-the inlet side window of the lower support roller area on the operating side; 2.3-the outlet side window of the upper support roller area on the operating side; 2.4-the outlet side window of the lower support roller area on the operating side; 2.5-the inlet side window of the upper support roller area on the transmission side; 2.6-the inlet side window of the lower support roller area on the transmission side; 2.7-the outlet side window of the upper support roller area on the transmission side; 2.8-the outlet side window of the lower support roller area on the transmission side.

[0078] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for measuring the size of a universal rolling mill window using a laser tracker, characterized in that: The steps include: Pull out the operating side frame of the rolling mill along the track and take out the rolls; Place the steel plate between the operating side frame and the transmission side frame of the rolling mill; push the operating side frame of the rolling mill along the track and lock it; Use an electric welder to firmly fix the steel plate to prevent its movement from causing micro-movement of the laser tracker; Install the laser tracker between the operating side frame and the transmission side frame, roughly flatten the laser tracker and fix it firmly with a hot melt glue gun; Calibrate and virtually level the laser tracker to establish the geoid; Measure each reference surface and the rack window surface, and fit them into surfaces respectively; Measure the coordinate values ​​of the reference points on the inlet and outlet sides, and connect the two points into a straight line as the rolling center line; Using the transmission side reference surface to fit a transmission side mid-surface; The average of all the measuring points of the transmission side inlet window is the transmission side inlet average point; the average of all the measuring points of the transmission side outlet window is the transmission side outlet average point; the transmission side inlet average point and the transmission side outlet average point are connected to form a transmission side straight line; the intersection of the transmission side straight line and the transmission side mid-plane is found as the transmission side midpoint; Establish a coordinate system, the first element is the midpoint of the transmission side, the second element is the geoid, and the third element is the rolling center line; record the y coordinate values ​​of the centroid of the operation side window and the transmission side window; Analyze and evaluate the rack window accuracy based on the recorded coordinate values: opening distance and center deviation; The recording of the centroid y coordinate values ​​of the operation side window and the transmission side window specifically includes: recording the centroid y coordinate values ​​of the operation side upper support roller area inlet side window, the operation side lower support roller area inlet side window, the operation side upper support roller area outlet side window, and the operation side lower support roller area outlet side window respectively. 2.1 ,y 2.2 ,y 2.3 ,y 2.4 ; Record the centroid y coordinate values ​​of the window on the inlet side of the transmission side upper support roller area, the window on the inlet side of the transmission side lower support roller area, the window on the outlet side of the transmission side upper support roller area, and the window on the outlet side of the transmission side lower support roller area respectively. 2.5 ,y 2.6 ,y 2.7 ,y 2.8 ; The analysis and evaluation of the rack window accuracy according to the coordinate system y value specifically includes: ① Calculation of opening distance a: Window spacing of upper support roller area on the operating side: a1=||y 2.1 |+|y 2.3 || Window spacing of lower support roller area on the operating side: a2=||y 2.2 |+|y 2.4 || Window spacing of upper support roller area on the transmission side: a3=||y 2.5 |+|y 2.7 || Window spacing of lower support roller area on transmission side: a4=||y 2.6 |+|y 2.8 || ② Calculation of center deviation d: Center deviation of the support roller area on the operating side: d1=|y 2.1 |-|y 2.3 | Center deviation of lower support roller area on the operating side: d2=|y 2.2 |-|y 2.4 | Center deviation of the support roller area on the transmission side: d3=|y 2.5 |-|y 2.7 | Center deviation of lower support roller area on the transmission side: d4=|y 2.6 |-|y 2.8 | in: y 2.1 Centering of the inlet window in the support roller area on the operating side; 2.2 - Window on the entrance side of the lower support roller area on the operating side; 2.3 -Exit side window of the support roller area on the operating side; 2.4 - outlet side window in the area of ​​lower support rollers on the operating side; 2.5 - Window on the inlet side of the support roller area on the transmission side; 2.6 - Entrance side window of lower support roller area on the transmission side; 2.7 -Exit side window of the support roller area on the transmission side; 2.8 -Outlet side window in the area of ​​the lower support roller on the transmission side.

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