CN112355062B - Method for measuring window size of PC (personal computer) rolling mill by laser tracker - Google Patents
Method for measuring window size of PC (personal computer) rolling mill by laser tracker Download PDFInfo
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- CN112355062B CN112355062B CN202011044129.4A CN202011044129A CN112355062B CN 112355062 B CN112355062 B CN 112355062B CN 202011044129 A CN202011044129 A CN 202011044129A CN 112355062 B CN112355062 B CN 112355062B
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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Abstract
The invention relates to a method for measuring the window size of a PC (personal computer) rolling mill by a laser tracker, belonging to the technical field of a steel rolling equipment management method. The technical scheme of the invention is as follows: calculating the distance from the measuring point to the reference surface; calculating the span of the memorial archway and the span of the lining plate according to the property of a point-to-plane function vector and the spatial position relationship, namely the distance between a target mirror and a plane base of the used laser tracker, the radius of the laser tracker and the spatial position relationship between measuring objects; and comparing the deviation with the design value to obtain the deviation of the size of the memorial archway window. The invention has the beneficial effects that: the size and deviation of the housing window can be obtained only by using a laser tracker to pick points on the reference point and the lining plate of the housing and calculating through SA software simulation and a formula, the precision can reach micron, the measuring time only needs 1.5 hours, and the measuring time is shortened by 2.5 hours compared with the measuring time of the traditional method, so that the size of the housing window of the rolling mill can be accurately and efficiently measured.
Description
Technical Field
The invention relates to a method for measuring the window size of a PC (personal computer) rolling mill by a laser tracker, belonging to the technical field of a steel rolling equipment management method.
Background
The plate-strip steel is the most important steel product, accounts for more than 50% of the total steel, and is widely applied to industries such as automobiles, shipbuilding, bridges, buildings, instruments, electronics, food packaging, household appliances and the like. PC mills, in which the rolls can cross, are widely used in hot strip lines because of their excellent profile control capability.
In order to ensure the rolling stability of the PC rolling mill, the window size of the rolling mill needs to be measured and adjusted regularly to meet the tolerance requirement of design +/-0.2 mm. The traditional precision detection method and the traditional precision detection tool can only carry out point-to-point measurement, cannot carry out point-to-surface or surface-to-surface measurement, have low accuracy and efficiency of measurement, and cannot detect the precision of the rolling mill on the same reference on the whole space; and the PC rolling mill has higher requirement on the dimensional accuracy of the window because of the special structure of the housing. With the development of modern laser measurement technology, laser trackers are widely applied to online form and position tolerance measurement of metallurgical equipment due to the measurement accuracy and high efficiency. There is a need to develop a method for measuring the window size of a PC mill housing using a laser tracker.
Disclosure of Invention
The invention aims to provide a method for measuring the size of a PC rolling mill window by using a laser tracker, which can simplify the operation of measuring the size of the PC rolling mill housing window, can obtain the size and deviation of the housing window by using the laser tracker to take points only on a housing reference point and a lining plate and calculating by SA software simulation and a formula, and has the precision reaching micron, the measurement time only needing 1.5 hours and being 2.5 hours shorter than the measurement time of the traditional method, thereby accurately and efficiently measuring the size of the housing window of the rolling mill and effectively solving the problems in the background technology.
The technical scheme of the invention is as follows: a method for measuring the window size of a PC rolling mill by a laser tracker comprises the following steps: using a reference point of the mill housing, and using a laser tracker to take the reference point to generate a reference surface (one inlet and one outlet); measuring and taking points on the lining plate of the housing, wherein the measuring points are uniformly distributed on the lining plate of the housing; performing data processing by using laser tracker operating software, and calculating the distance from a measuring point to a datum plane; calculating the span of the memorial archway and the span of the lining plate according to the property of a point-to-plane function vector and the spatial position relationship, namely the distance between a target mirror and a plane base of the used laser tracker, the radius of the laser tracker and the spatial position relationship between measuring objects; and comparing the deviation with the design value to obtain the deviation of the size of the memorial archway window.
And generating a reference surface, using a target mirror of a laser tracker, operating the laser tracker to perform point taking measurement on the reference points of the entrance and exit memorial archways of the rolling mill, measuring 4-6 points by each reference point, uniformly distributing the measuring points, and respectively establishing the reference surface by using an entrance point set and an exit point set.
The method is characterized in that points are measured and taken on the memorial archway lining plates, the memorial archway lining plates comprise supporting roll lining plates and working roll lining plates, eight supporting roll lining plates and eight working roll lining plates are respectively measured at the positions of the points taken by the tracker through operating the laser tracker, when the lining plates are directly measured by a measurer in sequence, eight points and four points are respectively measured, each lining plate is sequentially arranged from left to right and from top to bottom, a point set is respectively established for each lining plate, namely the point set of the supporting roll lining plates comprises eight measuring point data, and the point set of the working roll lining plates comprises four measuring point data.
The laser tracker operation software is used for data processing, reference planes are respectively established by using point sets of the reference points of the entrance and exit memorial archways, and the plane fitting error is controlled within 0.2 mm; and the distance from the point set of the inlet supporting roll lining plate and the working roll lining plate to the inlet reference surface and the distance from the point set of the outlet supporting roll lining plate and the working roll lining plate to the outlet reference surface are made by using the point-to-plane function.
And calculating the memorial archway span and the lining plate span according to the point-to-plane function vector properties and the spatial position relation to obtain formulas D = (X + X-2C)/2, E = (Y + Y-2C)/2, F = (Z + Z +2A + 2B)/2, G = E + F and H = F-D, calculating required data, and realizing automatic calculation by using a data calculation table.
The invention has the beneficial effects that: the method can simplify the measurement operation of the size of the window of the PC rolling mill housing, only uses a laser tracker to pick points on the datum point and the lining plate of the housing, obtains the size and deviation of the window of the housing through SA software simulation and formula calculation, has the precision of micron, only needs 1.5 hours for measurement, and shortens the measurement time by 2.5 hours compared with the traditional method, thereby accurately and efficiently measuring the size of the window of the rolling mill housing.
Drawings
FIG. 1 is a schematic view of a fixed end window of a PC mill liner;
FIG. 2 is a schematic illustration of the PC end of the PC mill liner;
FIG. 3 is a schematic view of a laser tracker target with a planar base;
FIG. 4 is a table of rolling mill window data calculations;
in the figure: the device comprises a rolling mill housing 1, a housing datum point 2, a supporting roll lining plate 3, a working roll lining plate 4, a tracker measuring point taking position 5, a laser tracker target mirror 6 and a plane base 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A method for measuring the window size of a PC rolling mill by a laser tracker comprises the following steps: using a self-contained reference point of the mill housing, and using a laser tracker to pick the reference point to generate a reference surface (one inlet and one outlet respectively); measuring and taking points on the lining plate of the housing, wherein the measuring points are uniformly distributed on the lining plate of the housing; performing data processing by using laser tracker operating software, and calculating the distance from a measuring point to a datum plane; calculating the span of the memorial archway and the span of the lining plate according to the property of a point-to-plane function vector and the spatial position relationship, namely the distance between a target mirror and a plane base of the used laser tracker, the radius of the laser tracker and the spatial position relationship between measuring objects; and comparing the deviation with the design value to obtain the deviation of the size of the memorial archway window.
And generating a reference surface, using a target mirror of a laser tracker, operating the laser tracker to perform point taking measurement on the reference points of the entrance and exit memorial archways of the rolling mill, measuring 4-6 points by each reference point, uniformly distributing the measuring points, and respectively establishing the reference surface by using an entrance point set and an exit point set.
The method is characterized in that points are measured and taken on the memorial archway lining plates, the memorial archway lining plates comprise supporting roll lining plates and working roll lining plates, eight supporting roll lining plates and eight working roll lining plates are respectively measured at the positions of the points taken by the tracker through operating the laser tracker, when the lining plates are directly measured by a measurer in sequence, eight points and four points are respectively measured, each lining plate is sequentially arranged from left to right and from top to bottom, a point set is respectively established for each lining plate, namely the point set of the supporting roll lining plates comprises eight measuring point data, and the point set of the working roll lining plates comprises four measuring point data.
The laser tracker operation software is used for data processing, reference planes are respectively established by using point sets of the reference points of the entrance and exit memorial archways, and the plane fitting error is controlled within 0.2 mm; and the distance from the point set of the inlet supporting roll lining plate and the working roll lining plate to the inlet reference surface and the distance from the point set of the outlet supporting roll lining plate and the working roll lining plate to the outlet reference surface are made by using the point-to-plane function.
And calculating the memorial archway span and the lining plate span according to the point-to-plane function vector properties and the spatial position relation to obtain formulas D = (X + X-2C)/2, E = (Y + Y-2C)/2, F = (Z + Z +2A + 2B)/2, G = E + F and H = F-D, calculating required data, and realizing automatic calculation by using a data calculation table.
Referring to fig. 1 and 2, which are fixed end windows, and fig. 2 which is a PC end, a rolling mill comprises eight backing roll liners and eight work roll liners; the reference point 2 of the housing is a reference point of the rolling mill, and 16 inlets and outlets are respectively arranged; the tracker of mark on backing roll welt 3 and the work roll welt 4 measures and gets some position 5, has eight on the backing roll welt 3, has four on the work roll welt 4, evenly distributed, and it is from a left side to the right side and from last extremely down when being the survey crew straight face welt in order.
As shown in fig. 3, the laser tracker target mirror 6 and the planar base 7 are used for window measurement, and can be combined or separated, and are combined by the planar base 7 with magnetic force, wherein the radius of the laser tracker target mirror 6 is B, the thickness of the planar base 7 is C, the distance from the center to the bottom surface after the combination of the laser tracker target mirror 6 and the planar base 7 is a, and a = B + C.
Fig. 4 is a table of automatic window size calculation for the upper half of the rolling mill, and the lower half is the same.
Example (b):
measuring the size of a window of a PC rolling mill, drawing out all rollers of the rolling mill, effectively cutting off various energy media, cleaning the surface of a lining plate of the housing of the rolling mill, and eliminating a gap between the lining plate and the housing by using a special ejector rod and a special jack; the laser tracker is fixed on a stable platform at the operation side of the rolling mill, the laser of the tracker can cover all lining plates of a window of the rolling mill housing, and the laser tracker is leveled.
Using a laser tracker target mirror 6, operating the laser tracker to measure the points of reference points 2 of an entrance and an exit of the housing of the rolling mill, wherein each reference point measures 4-6 points, the measured points are uniformly distributed, the laser tracker target mirror 6 needs to be in close contact with the reference points 2 of the housing, and a point set is respectively established at the entrance and the exit.
The laser tracker target mirror 6 and the plane base 7 are used, the tracker is operated to respectively take eight points and four point measurements at the tracker measurement point taking position 5 of eight supporting roll lining plates 3 and working roll lining plates 4, when the liner plates are directly taken by a measurer in sequence, a point set is respectively established on each lining plate from left to right and from top to bottom, namely, the supporting roll lining plate 3 point set contains eight measuring point data, and the working roll lining plate 4 point set contains four measuring point data.
And (3) performing data processing by using laser tracker operating software, and respectively establishing reference planes by using two point sets of reference points of the entrance and exit memorial archways, wherein the plane fitting error is controlled within 0.2 mm.
The distance between four supporting roll lining plates 3 and working roll lining plates 4 of an inlet and an inlet reference plane is point set by using a point-to-plane function, the distance set is X, and the actual average value set is D; making the distance from a point set of four supporting roll lining plates 3 and working roll lining plates 4 at an outlet to an outlet reference plane, setting the distance set as Y, and setting the actual average value set as E; making the distance from a point set of four supporting roll lining plates 3 and working roll lining plates 4 at an outlet to an inlet reference plane, and setting the distance set as Z and the actual average value as a set F; the memorial archway span set is G, and the lining plate span set is H.
If the distances from the first and second points in the point set of the backing roll lining plate 3 on the operation side of the laser tracker operation software inlet to the inlet reference plane are X1 and X2, and according to the properties of the point-to-plane function vectors, the actual average value of the two points is D1,2= (X1 + X2-2C)/2; if the distances from the first and second two points in the point set of the backup roll backing 3 on the exit-operation side to the exit reference plane are Y1 and Y2, the two-point actual average value E1,2= (Y1 + Y2-2C)/2, according to the point-to-plane function vector property; if the distances from the first and second two points in the set of points of the backup roll backing 3 on the outlet operation side to the inlet reference plane are Z1 and Z2, the two points are actually averaged to be F1,2= (Z1 + Z2+2A + 2B)/2, in accordance with the point-to-plane function vector property;
according to the spatial position relation, the corresponding memorial archway span G1,2= E1,2+ F1,2, the corresponding lining span H1,2= F1,2-D1, 2; and respectively inputting the distances from all point sets to the plane and the standard values into a data calculation table shown in the figure 3, and setting functions according to formulas in a correspondence table D, E, F, G, H to realize automatic calculation.
The inclination and the plane state of the lining plate can be judged and analyzed according to the data from the point set to the reference plane; the window adjustment can be calculated according to D, F, G, H and compared with a standard value.
Claims (3)
1. A method for measuring the window size of a PC rolling mill by a laser tracker is characterized by comprising the following steps: using a reference point of the mill housing to take the point by using a laser tracker to generate a reference surface; measuring and taking points on the lining plate of the housing, wherein the measuring points are uniformly distributed on the lining plate of the housing; performing data processing by using laser tracker operating software, and calculating the distance from a measuring point to a datum plane; calculating the span of the memorial archway and the span of the lining plate according to the property of a point-to-plane function vector and the spatial position relationship, namely the distance between a target mirror and a plane base of the used laser tracker, the radius of the laser tracker and the spatial position relationship between measuring objects; comparing and calculating with a design value to obtain the deviation of the size of the memorial archway window; generating a reference surface, using a target mirror of a laser tracker, operating the laser tracker to perform point taking measurement on the self reference points of the entrance and exit memorial archways of the rolling mill, measuring 4-6 points by each reference point, uniformly distributing the measuring points, and respectively establishing the reference surface by using an entrance point set and an exit point set;
the distance between an inlet supporting roll lining plate and a working roll lining plate point set to an inlet reference plane is made by using a point-to-plane function, the distance set is X, and the actual average value set is D; making a distance from a point set of the outlet supporting roll lining plate and the working roll lining plate to an outlet reference plane, setting a distance set as Y, and setting an actual average value set as E; making a distance from a point set of an outlet supporting roll lining plate and a working roll lining plate to an inlet reference plane, setting a distance set as Z, and setting an actual average value as a set F; setting the memorial archway span set as G and the lining plate span set as H; calculating the memorial archway span and the lining plate span according to the point-to-plane function vector properties and the spatial position relation to obtain formulas D = (X + X-2C)/2, E = (Y + Y-2C)/2, F = (Z + Z +2A + 2B)/2, G = E + F and H = F-D, calculating required data, and realizing automatic calculation by using a data calculation table;
wherein, B is the radius of the laser tracker target mirror, C is the thickness of the plane base, A is the distance from the center to the bottom surface after the laser tracker target mirror and the plane base are combined, and A = B + C.
2. The method for measuring the window size of the PC rolling mill by the laser tracker as claimed in claim 1, wherein: the point is got in the measurement on memorial archway welt, and memorial archway welt contains backing roll welt and work roll welt, and eight points and four point measurements are got respectively to eight backing roll welts and work roll welt in the tracker measurement point position department to operation laser tracker, and from a left side to the right side and from last to down when the order is surveyor's straight face welt, and every welt respectively establishes a point set, and backing roll welt point set contains eight measurement station data promptly, and work roll welt point set contains four measurement station data.
3. The method for measuring the window size of the PC rolling mill by the laser tracker as claimed in claim 1, wherein: the laser tracker operation software is used for data processing, reference planes are respectively established by using point sets of the reference points of the entrance and exit memorial archways, and the plane fitting error is controlled within 0.2 mm; and the distance from the point set of the inlet supporting roll lining plate and the working roll lining plate to the inlet reference surface and the distance from the point set of the outlet supporting roll lining plate and the working roll lining plate to the outlet reference surface are made by using the point-to-plane function.
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| CN113617857A (en) * | 2021-07-07 | 2021-11-09 | 唐山钢铁集团有限责任公司 | Application method of SA software in CVC rolling mill window measurement |
| CN113587869B (en) * | 2021-07-22 | 2023-09-29 | 鞍钢重型机械有限责任公司 | Six-roller mill assembly and method for detecting assembly precision by adopting laser tracker |
| CN115382925A (en) * | 2022-08-30 | 2022-11-25 | 包头钢铁（集团）有限责任公司 | Method for measuring window size of hot rolling mill |
| CN116136396B (en) * | 2023-04-17 | 2023-08-01 | 思看科技(杭州)股份有限公司 | Three-dimensional scanning method based on tracking scanning system and tracking scanning system |
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| CN107537868B (en) * | 2017-08-22 | 2019-03-05 | 安徽马钢重型机械制造有限公司 | A kind of cold rolling mill window space position dimension precision online test method |
| CN109013716B (en) * | 2018-07-27 | 2020-01-21 | 北京科技大学 | Method, system and storage medium for online detection of position change of central axis of roller |
| CN111421001B (en) * | 2019-01-10 | 2021-08-17 | 宝山钢铁股份有限公司 | Online accurate centering system of high-speed wire rod mill and centering method thereof |
| CN210833417U (en) * | 2019-11-22 | 2020-06-23 | 上海鼎艺冶金科技有限公司 | Y-shaped target ball seat |
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