CN113587869A - Six-roller mill assembly and method for detecting assembly accuracy by adopting laser tracker - Google Patents
Six-roller mill assembly and method for detecting assembly accuracy by adopting laser tracker Download PDFInfo
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- CN113587869A CN113587869A CN202110830096.4A CN202110830096A CN113587869A CN 113587869 A CN113587869 A CN 113587869A CN 202110830096 A CN202110830096 A CN 202110830096A CN 113587869 A CN113587869 A CN 113587869A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to the technical field of detection of rolling mill equipment, in particular to six-roller mill assembly and a method for detecting assembly accuracy by adopting a laser tracker. The positions of the rolling mill bottom plate and the frame which need to be adjusted and measured in precision are assembled and roughly adjusted by utilizing a level bar, a level meter, a square, a feeler gauge and the like, and the precision is within 0.05 mm/m. And a laser tracker with the accuracy of 0.001mm is adopted for data detection. And a target ball is placed at each position to be measured, laser emitted by the host machine is emitted to the target ball and returns to the host machine, and the returned light beam is received by the detection system and used for measuring and calculating the spatial position of the target to obtain spatial coordinate data. The method comprises the steps of utilizing a detection mode combining a laser tracker and a traditional measurement method to detect data of six-roller assembly, carrying out precision adjustment on an assembly rolling mill through mapped data, meeting various precision requirements of final rolling mill assembly, realizing rapid assembly of the rolling mill, and obtaining high-quality rolling mill assembly precision meeting design requirements.
Description
Technical Field
The invention relates to the technical field of detection of rolling mill equipment, in particular to six-roller mill assembly and a method for detecting assembly accuracy by adopting a laser tracker.
Background
A six-high rolling mill is one of the reversible rolling mills, which involves rolling of a sheet by two work rolls, two intermediate rolls and two back-up rolls, and is therefore called a six-high rolling mill. The rolling mill is suitable for rolling precise thin steel plates or nonferrous metals, so compared with a four-roller rolling mill, two more intermediate roller systems can realize larger rolling force and more accurate control and adjustment.
As six sets of roller systems need to be installed in the assembly of the six-roller mill, the assembly of the mill needs higher precision, the precision of each part of the assembly of the mill is detected by adopting a level meter, a flat ruler and a square ruler in the traditional technology, but the required high precision requirement cannot be ensured by the traditional detection mode because the six-roller mill requires higher precision.
The laser tracker measuring system is a high-precision large-size measuring instrument in an industrial measuring system. The system integrates various technologies such as a laser interference ranging technology, a photoelectric detection technology, a precision mechanical technology, a computer and control technology, a modern numerical calculation theory and the like, tracks a space moving target and measures the space three-dimensional coordinate of the target in real time. The device has the characteristics of high precision, high efficiency, real-time tracking measurement, quickness in installation, simplicity and convenience in operation and the like, and is suitable for being applied to assembly measurement of a six-roller mill.
However, the laser tracker has high precision, and the field working environment has great influence on the measurement precision of the laser tracker: when the temperature changes by 1 degree or the atmospheric pressure changes by 3mmHg, the relative measurement precision brings 2.5PPm error, and the device can not be placed at the position close to a heat source, an air-conditioning ventilation opening, a doorway, a bottom surface joint and a place where sunlight can directly irradiate the tracker, and large-scale machinery and vehicles do not work around a working place, and vibration and other conditions do not occur. In the process of the operation of a rolling mill assembly site, a crane runs, a machine tool operates in a factory building, and all conditions measured by a laser tracker cannot be completely met, so that the condition of inaccurate measured data can occur when the laser tracker is completely used for detection, and the assembly precision of the rolling mill is directly influenced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a six-roller mill assembly and a method for detecting the assembly precision by adopting a laser tracker.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for assembling a six-roller mill and detecting assembly accuracy by adopting a laser tracker specifically comprises the following steps:
1) assembling and detecting a rack:
the frame assembly comprises a rolling mill bottom plate, an operation side frame, a transmission side frame and an upper cross beam, wherein the rolling mill bottom plate is used as a reference when the operation side frame and the transmission side frame are installed;
mounting and detecting a bottom plate of a rolling mill:
A. paving a steel plate on the ground, detecting the surface of the steel plate by adopting a level meter, and controlling the levelness within 0.1 mm;
B. installing two rolling mill bottom plates on a steel plate, adjusting the levelness of the installation surface of the rolling mill bottom plates by adopting adjustable sizing blocks between the rolling mill bottom plates and the steel plate, detecting by adopting a leveling rod and a level meter during adjustment, and adjusting the precision within 0.05 mm/m;
C. ensuring that the workshop environment meets the requirements of the laser tracker, placing a target ball at each position to be measured, enabling laser emitted by a host of the laser tracker to irradiate the target ball and return to the host, wherein the returned light beam is received by a detection system and is used for measuring and calculating the spatial position of a target to obtain spatial coordinate data;
D. adjusting the installation accuracy of the rolling mill base plates by using the obtained space coordinate data, controlling the flatness of planes on the two rolling mill base plates within 0.04mm/m and controlling the total levelness within 0.08 mm;
secondly, installing and detecting an operation side rack and a transmission side rack:
A. the rolling mill operation side frame and the transmission side frame are vertically arranged on the bottom surface of the rolling mill, the contact surface of the bottom surface of the detection frame and a rolling mill bottom plate is more than 75% of the perimeter of a feeler gauge in the horizontal and vertical directions, and the plugging depth of the feeler gauge with the thickness of 0.05mm is not more than 50 mm;
B. putting a flat ruler on the bottom surfaces of two machine frame windows, detecting the flatness of the bottom surfaces of the two machine frame windows, measuring the levelness by using a levelmeter, controlling the levelness within 0.05mm/m, then placing a target ball of a laser tracker on the position of the flat ruler, reading Y-axis numerical values of a plurality of position coordinates, wherein the maximum deviation is the flatness of the bottom surfaces of the two windows, and when the precision is out of tolerance, adding an adjusting gasket between the bottom surface of a machine frame and a bottom plate of a rolling mill;
C. measuring the deviation of the central lines of the windows of the two frames, and controlling the deviation of the two frames to be not more than 0.10 mm;
first, the centerline offset passes (C) in a two-frame window elevation leveling ruler test1-C2) Acquiring and completing coarse adjustment;
c1 is the measuring distance between the flat ruler and the inside of one side of the frame window, and the unit is mm;
c2 is the measuring distance between the flat ruler and the inner side of the other side of the frame window, and the unit is mm;
then, measuring by a laser tracker, placing a target ball of the laser tracker in a region point to be inspected,
the reference features are as follows:
i, fitting a middle split surface by using mother surfaces of the sliding plates of the lower supporting rollers at the inlet and the outlet of the operation side;
II, taking the perpendicularity of each sliding plate mother surface as a reference characteristic by using the bottom surface of the operation side memorial archway;
III, taking the inlet sliding plate mother surface as a reference characteristic for all outlet sliding plate mother surface parallelism reference characteristics;
IV, taking a median plane as a reference characteristic for the symmetry of each window;
the remaining surfaces in the bay window are inspected in sequence.
2) Assembling and detecting a working roll system, a middle roll system, a supporting roll system, a roll changing roller way, a roll bending cylinder and a balance cylinder:
the gap between each roll system bearing seat and the frame window sliding plate is obtained by the difference between the size of the frame window and the outer width of the roll system bearing seat measured by a laser tracker;
A. the size of a frame window is obtained through a laser tracker, and the precision is 0.001 mm;
B. measuring the outer width dimension of the bearing seat by an outer diameter caliper;
C. sequentially measuring and calculating the gap values of the matching surfaces of the working roll system, the middle roll system, the supporting roll system and the cylinder block;
and finally, finishing various dimension and precision tests of the six-roller mill.
Compared with the prior art, the invention has the beneficial effects that:
1) the device realizes rapid detection and adjustment, does not influence the operation of a normal crane and a machine tool on site, and has high assembly, adjustment and inspection efficiency.
2) The service time of the laser tracker equipment is short, and after the leveling ruler and the level gauge are roughly adjusted, the laser tracker equipment is used for carrying out accurate inspection.
3) The equipment precision can not be influenced by the technical level of a bench worker operator, the detection data precision is high, the 0.001 precision can be realized, and the rechecking precision completely meets the design requirement after the equipment is installed on a user site.
4) And the operation time of field personnel and the labor intensity of detection personnel are reduced.
Drawings
FIG. 1 is a schematic view of a rack assembly;
FIG. 2 is a schematic diagram of a baseplate measurement data point location;
FIG. 3 is a schematic view of a bottom measurement of a window;
FIG. 4 is a schematic view of a rack window centering test measurement.
In the figure: 1-rolling mill base plate 2-operation side frame 3-transmission side frame 4-upper beam 5-central line 6-laser tracker main machine 7-target ball 8-level gauge 9-leveling rod
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings in which:
a method for assembling a six-roller mill and detecting assembly accuracy by adopting a laser tracker specifically comprises the following steps:
method for assembling and detecting frames of one-roller and six-roller rolling mills
The frame assembling precision is an important guarantee for the precision of the rolling mill, is an important standard for assembling a working roll system, a middle roll system and a supporting roll system, and directly influences the precision of a rolling mill plate strip. Because the traditional measuring method of the leveling ruler 9 and the level gauge 8 is not limited by the field operation environment, the traditional measuring method is used as the rough adjustment measurement, after the rough adjustment precision is met, other operations are stopped on the field, and when the detection condition of the laser tracker is met, the laser tracker is used for final precision measurement, so that all the precision required by the design of the drawing is finally met. The rolling mill assembly was measured by a combination of a three-dimensional laser tracker with a Swiss Leica accuracy of 0.001mm and a leveling and leveling instrument.
As shown in fig. 1, the stand assembly includes a mill bedplate 1, an operating side stand 2, a driving side stand 3, and an upper cross beam 4. When the two frames are installed, the rolling mill base plate 1 is taken as a reference, the flatness of the planes on the two rolling mill base plates 1 is required to be controlled within 0.04mm/m, and the total levelness is within 0.08 mm.
1. Rolling mill base plate 1 installation and detection
(1) Firstly, assembling on an assembly flat iron, cleaning out a field, paving a thick steel plate for dispersedly and intensively stressing the flat iron, detecting the surface of the steel plate by adopting a level meter, and controlling the levelness within 0.1 mm.
(2) Two rolling mill bottom plates 1 are arranged on a steel plate, adjustable sizing blocks are arranged between the rolling mill bottom plates 1 and the steel plate to adjust the levelness of the installation surface of the bottom plate, a leveling rod and a level meter are used for detection during adjustment, and the adjustment precision is within 0.05 mmm.
(3) The on-site crane stops working to ensure that the workshop environment meets the requirement of the laser tracker, the laser target balls 7 are placed on the upper plane of the rolling mill bottom plate 1, laser is emitted by the laser tracker main machine 6 at the position points of (i), (ii), (iv), (v) and (v) shown in figure 2, and the space coordinates of each point are obtained by receiving the laser target balls 7. And (3) determining a reference plane, wherein the maximum deviation of the coordinate values of 8 points on the Y axis is the planeness of the plane on the rolling mill base plate 1, if an out-of-tolerance value exists, adjusting the adjustable sizing block corresponding to the lower position, and finally adjusting the planeness of the plane on the rolling mill base plate 1 to 0.05mm through practice, wherein the final total levelness is within 0.08 mm.
2. Rolling mill stand installation and detection
Since a rolling stand is a reference for mounting each component, reference detection for assembling the stand is the most important detection content in mounting the rolling mill.
(1) The rolling mill operation side frame 2 and the transmission side frame 3 are vertically arranged on the rolling mill base plate 1, the contact surface of the bottom surface of the detection frame and the rolling mill base plate 1 is detected, a feeler gauge is adopted, the peripheral length of the feeler gauge in the horizontal and vertical directions is 75%, and the plugging depth of the feeler gauge with the thickness of 0.05mm is not more than 50 mm.
(2) As shown in figure 3, a flat ruler 9 is adopted to be supported on the bottom surfaces of two machine frame windows, the flatness of the bottom surfaces of the two machine frame windows is detected, a levelmeter 8 is used for measuring the levelness within 0.05mm/m, then a target ball 7 of a laser tracker is placed on the positions (1), (2), (3), (4) and (5) of the flat ruler 9, the Y-axis numerical value of the five-point position coordinate is read, the maximum deviation is the flatness of the bottom surfaces of the two windows, and when the precision is out of tolerance, an adjusting gasket needs to be added between the bottom surface of the machine frame and a bottom plate 1 of a rolling mill.
(3) Measuring the offset of the two gantry window centerlines 5 is the most important key point in gantry assembly. It is required that the two frames are offset by no more than 0.10 mm.
As shown in FIG. 4, the centerline 5 offset is obtained by (C1-C2)/2 as first checked on the two-frame window vertical horizontal ruler 9, and coarse adjustment is completed. C1 is the measuring distance between the flat ruler and the inside of one side of the frame window, and the unit is mm; c2 is the measured distance in mm of the flat rule from the inside of the other side of the window of the rack.
Then measured by the laser tracker, the target ball 7 of the laser tracker is placed in the spot of the area to be examined, the reference features being established as follows.
a. The median plane is formed by fitting the mother surfaces of the sliding plates of the lower supporting rollers at the inlet and the outlet of the operation side.
b. The perpendicularity of each sliding plate mother surface takes the bottom surface of the operation side memorial archway as a reference characteristic.
c. All outlet slide plate generatrix parallelism reference features use the inlet slide plate generatrix as a reference feature.
d. Each window symmetry degree takes a median plane as a reference characteristic.
Actual detection data are obtained after measurement, and when the size is out of tolerance, adjustment is carried out by increasing or reducing the thickness of the adjusting pad on the positioning surface in the vertical direction of the rack and the bottom plate.
The remaining surfaces in the rack window are inspected in sequence, all according to the above procedure.
Assembly and detection of other parts of two-roller and six-roller rolling mill
The six-roller mill assembly comprises a frame, a working roller system, a middle roller system, a supporting roller system, other roller changing roller ways, a roller bending cylinder, a balance cylinder and other part sleeves. The main inspection precision is the clearance between each roll system bearing seat and the frame window sliding plate, and the like.
The gap is obtained by the difference between the size of the frame window measured by the laser tracker and the outer width of the bearing block of the roll system.
1. The gantry window size has been obtained with a laser tracker to an accuracy of 0.001 mm.
2. And measuring the outer width dimension of the bearing seat by an outer diameter caliper.
3. And measuring and calculating the gap values of the matching surfaces of the working roll system, the intermediate roll system, the supporting roll system and the cylinder block in sequence.
And finally, finishing various dimension and precision tests of the six-roller mill.
According to the invention, a detection mode combining a laser tracker and a traditional measurement method is utilized to carry out data detection on the assembly of the six-roller mill, and the precision of the assembly mill is adjusted through the mapped data, so that the rapid assembly of the mill is finally realized, and the high-quality assembly precision of the mill meeting the design requirements is obtained.
The invention realizes rapid detection and adjustment, does not influence the normal crane and machine tool operation on site, and has high assembly, adjustment and inspection efficiency. The service time of the laser tracker equipment is short, and after the leveling ruler 9 and the level gauge 8 are roughly adjusted, the laser tracker equipment is used for carrying out accurate inspection. The equipment precision cannot be influenced by the technical level of a bench worker operator, the detection data precision is high, the 0.001 precision can be realized, and the rechecking precision completely meets the design requirement after the equipment is installed on a user site. The operation time of field personnel and the labor intensity of detection personnel are reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The method for assembling the six-roller mill and detecting the assembling precision by adopting the laser tracker is characterized by comprising the following steps of:
1) assembling and detecting a rack:
the frame assembly comprises a rolling mill bottom plate, an operation side frame, a transmission side frame and an upper cross beam, wherein the rolling mill bottom plate is used as a reference when the operation side frame and the transmission side frame are installed;
mounting and detecting a bottom plate of a rolling mill:
A. paving a steel plate on the ground, detecting the surface of the steel plate by adopting a level meter, and controlling the levelness within 0.1 mm;
B. installing two rolling mill bottom plates on a steel plate, adjusting the levelness of the installation surface of the rolling mill bottom plates, and detecting by adopting a leveling rod and a level meter during adjustment, wherein the adjustment precision is within 0.05 mm/m;
C. ensuring that the workshop environment meets the requirements of the laser tracker, placing a target ball at each position to be measured, enabling laser emitted by a host of the laser tracker to irradiate the target ball and return to the host, wherein the returned light beam is received by a detection system and is used for measuring and calculating the spatial position of a target to obtain spatial coordinate data;
D. adjusting the installation accuracy of the rolling mill base plates by using the obtained space coordinate data, controlling the flatness of planes on the two rolling mill base plates within 0.04mm/m and controlling the total levelness within 0.08 mm;
secondly, installing and detecting an operation side rack and a transmission side rack:
A. the rolling mill operation side frame and the transmission side frame are vertically arranged on the bottom surface of the rolling mill, the contact surface of the bottom surface of the detection frame and a rolling mill bottom plate is more than 75% of the perimeter of a feeler gauge in the horizontal and vertical directions, and the plugging depth of the feeler gauge with the thickness of 0.05mm is not more than 50 mm;
B. putting a flat ruler on the bottom surfaces of two machine frame windows, detecting the flatness of the bottom surfaces of the two machine frame windows, measuring the levelness by using a levelmeter, controlling the levelness within 0.05mm/m, then placing a target ball of a laser tracker on the position of the flat ruler, reading Y-axis numerical values of a plurality of position coordinates, wherein the maximum deviation is the flatness of the bottom surfaces of the two windows, and when the precision is out of tolerance, adding an adjusting gasket between the bottom surface of a machine frame and a bottom plate of a rolling mill;
C. measuring the deviation of the central lines of the windows of the two frames, and controlling the deviation of the two frames to be not more than 0.10 mm;
firstly, performing horizontal ruler inspection on the vertical faces of two frame windows, obtaining the center line offset through (C1-C2)/2, and completing coarse adjustment;
c1 is the measuring distance between the flat ruler and the inside of one side of the frame window, and the unit is mm;
c2 is the measuring distance between the flat ruler and the inner side of the other side of the frame window, and the unit is mm;
then, measuring by a laser tracker, placing target balls of the laser tracker in the region points to be inspected, and sequentially inspecting the rest surfaces in the window of the rack;
2) assembling and detecting a working roll system, a middle roll system, a supporting roll system, a roll changing roller way, a roll bending cylinder and a balance cylinder:
the gap between each roll system bearing seat and the frame window sliding plate is obtained by the difference between the size of the frame window and the outer width of the roll system bearing seat measured by a laser tracker;
A. the size of a frame window is obtained through a laser tracker, and the precision is 0.001 mm;
B. measuring the outer width dimension of the bearing seat by an outer diameter caliper;
C. sequentially measuring and calculating the gap values of the matching surfaces of the working roll system, the middle roll system, the supporting roll system and the cylinder block;
and finally, finishing various dimension and precision tests of the six-roller mill.
2. The method for assembling the six-roller mill and detecting the assembling accuracy by adopting the laser tracker according to claim 1, wherein the levelness of the installation surface of the mill base plate is adjusted by adopting an adjustable sizing block between the mill base plate and the steel plate in the step 1).
3. The method for assembling the six-roller mill and detecting the assembling precision by adopting the laser tracker according to claim 1, wherein the step 1) and the step C have the following reference characteristics:
i, fitting a middle split surface by using mother surfaces of the sliding plates of the lower supporting rollers at the inlet and the outlet of the operation side;
II, taking the perpendicularity of each sliding plate mother surface as a reference characteristic by using the bottom surface of the operation side memorial archway;
III, taking the inlet sliding plate mother surface as a reference characteristic for all outlet sliding plate mother surface parallelism reference characteristics;
and IV, taking the median plane as a reference characteristic for the symmetry degree of each window.
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| CN113587869B (en) | 2023-09-29 |
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