JPS5892808A - Measuring method and device for roll shape - Google Patents

Abstract

PURPOSE:To measure a roll shape in the inline state with a high precision, by measuring the distance to the roll by a distance sensor which can be moved in parallel with the roll and measuring the quantity of displacement of the sensor with irradiation of an optical beam and using both measured values. CONSTITUTION:A distance sensor 27 is attached to a slidable truck 22 on a guide rail 21 parallel with a roll 11 of a rolling mill, and a deflection meter 30 consisting of reflective mirrors 34a and 34b is provided on the left face. In case of measurement, a position in the circumferential direction is specified by a rotary encoder 44, and the sensor 27 is moved to measure the distance to the surface of the roll, and the measured value is inputted to an operating device 41. Meanwhile, the sensor 27 is irradiated with the optical beam from a laser beam generator 31, and the quantity of deflection of the sensor 27 to the optical axis of the beam is measured through an interferometer 32 and etc. In the device 41, a prescribed correction is performed on a basis of both measured values to calculate the shape of the roll. Thus, the shape of the roll is measured in the inline state with a high precision even if the rail 21 is distorted because of thermal expansion or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention proposes a roll shape defining method that can measure the roll shape of a rolling mill while it is installed in a mill nozzle, and an apparatus used to carry out the method.

Since wear of the rolls in a rolling mill is unavoidable, the rolls are replaced periodically and used rolls are subjected to grinding for the 8th roll. However, replacing the rolls requires a lot of effort. Although the rolls have been repaired, there have been problems in that the old rolls are still usable or that replacement is delayed, resulting in poor rolling. For this reason, various methods have been developed to measure the roll shape in-line with fresh oil while the roll is still installed in the Milno 1 housing. This method involves adding multiple distance sensors (differential transformer type, eddy current type, valley accumulator type, etc.) to a pedestal horizontally mounted along the roll surface parallel to the axis of the roll. I don't know how to detect the distance between the roll and the six faces of the roll to find the roll profile. Although the measurement accuracy must be approximately 10 to 30 μm, it is extremely difficult to ensure this accuracy due to constraints on the dimension #IPIIL of the pedestal serving as the measurement standard. In other words, in order to maintain a stable device with respect to the roll axis in a strong vibration and still temperature environment, it is necessary to make specifications that ignore ILD economics.

The present invention was made in view of the circumstances, and the above-mentioned mount has the role of supporting or guiding the distance sensor. :
The purpose of the present invention is to provide a roll shape measuring method that enables practical high-level measurement by relying on a light beam of a laser beam as a reference for measurement, and an apparatus used for the actual measurement. do. A method for measuring roll shape according to the present invention: A distance sensor is moved along a guide means provided parallel to the roll axis and facing the roll surface, and the distance # between the distance sensor and the roll surface is measured. While rolling, a light beam is projected along the movement range of the distance control sensor, the amount of deviation between the distance sensor and the light beam is measured, and both measurements are clearly revealed to identify the roll shape. do.

Hereinafter, the method of the present invention will be specifically explained based on the drawings showing the apparatus d used for carrying out the method. FIG. Milno Ujifugu 120 supporting Roll 11
Two guide rails 21, 21 are installed horizontally on the inlet (or outlet) side, parallel to the roll 11.

A carriage 22 is engaged with the guide rail 11.21 so as to be movable in the direction in which the guide rail 11.21 extends, that is, in the longitudinal direction of the roll axis. On both left and right sides of this trolley 22, sprockets (23, 24) provided at the left and right ends of the guide wheels 21, 21 are connected to both ends of a chain 25 which is rotated, and to the sprocket 24 on the right side. The carriage 22 is guided by the guide rails 21' and 21 to move to the right or to the left by the forward and reverse rotation of the interlocking motor 26. A distance sensor 2) is mounted on the cart 22 to measure the distance X+1'' between the cart itself or the cart 22 and the roll surface. , a contact type in combination with a differential transformer that detects the plunger movement in the W direction, or a non-contact type such as an optical type using a laser or a static capacitance type.
and n may be a well-known one.

On the left side of the distance sensor 2'7 (9 wheels 22 may be used), there are two reflective sheets 34a, 34 as shown in the enlarged view in FIG.
A reflector assembly 34 consisting of b is attached. This reflecting mirror assembly 34 constitutes the cabinet 30. Nuclear deviation meter 3017i guide rail 2 units, 21
Or trolley 22. The straight history of the movement trajectory of the distance sensor 27 is
7111j as the deviation tx2 with respect to the laser beam
This device consists of a laser beam generator 31, a Wollaston prism interferometer 32, a reflector 33, a reflector assembly 34, a detector 35, and a signal processor 36. A measurement system 5526A is used.

To the left of the guide rail 21.21, the guide rail 21°21
Alternatively, a rigid frame provided separately from the mill housing 12 (
(not shown) includes a reflecting mirror 33, a roll axis 11a, and a
Orthogonal to the mill housing 12 people td! I (or exit side) K is mounted vertically at an angle of 45° with the extending horizontal leg, and the radar beam generator 3 is mounted in the direction of this horizontal leg.
1. Wollaston prism interference "r32 and detector 35 are arranged, and the laser beam generator 31 generates a laser beam of two frequencies using the Zeeman effect etc. This laser beam is generated by the Wollaston fist prism interferometer. 3' 2 K, the beam is separated into two frequency components and exits with a narrow included angle.The beam of each frequency passes through the reflecting mirror 33 which serves as a beam pender, and then passes through the reflecting mirror 34a.

34b, where it is reflected and reversely KMed on the outward path, and the image frequency components are combined again in the Wollaston prism interferometer 32, and then provided to the detector 35 using a half mirror or the like.

FIG. 2 is a drawing for explaining the principle of this 1-place meter, and for convenience of explanation, the trees of the Wollaston prism interferometer 32 and the reflecting mirrors 34a and 34b are shown as -11? It is shown in a plan view with it placed on top.

The laser beam generator total of two frequency component elements Isfl is separated into each of the 32e iron frequency '1sf2n kimachi σ-
At this point, head toward the reflector assembly 34. The two reflective rods 34 a, 34 bil of the reflective real assembly 34.

The supplementary angle of θ is set as the included angle, and the reference state is 1.
The optical axis of the interferometer 32 coincides with the -1 center of both reflecting bars 34a, 34b, and the half-open and reflecting whales 34a, 34 are aligned with the optical axis.
b It is arranged so as to form an angle of θ/2 with the yoke plane of the sky. From this t'LK, the laser beam with the wave number fI+f2 is reflected at right angles by the curved surfaces of the reflection IQs 34a and 34b1, and the forward and backward paths of the light coincide.

[2] From the reference state (corresponding to x2 = o) like this, the lever horizontally deviates by ΔX in the direction approaching the roll 11 as shown by the two-dot chain line in Figure 2 (that is, x2 = ΔXI
) Then, the reflecting mirror 34a on the roll 11 side
The distance between the interferometer and the interferometer 32 becomes longer by Δd, and conversely, the distance between the reflection gorge 341) which is farther from the roll 11 and the interferometer 32 becomes shorter by the distance m by Δd.
The optical path length difference of the laser beam 2 at t't is 4Δd. The detector 35i'l optically captures the interference fringes caused by the optical path length difference Δd and converts them into light. Calculate Δd and Δχ in a chivalrous manner,
This is connected to the top nose stopper device A41. Note that even when the deflection direction of the reflective tax assembly 34 is reversed, x2'=ΔX can be calculated in the same way.

In the above-described embodiment, the laser beam generator 31 was provided at the 61 side facing the input (or output side) of the roll 11, but in order to save space, it was placed above to emit the laser beam downward. It is also possible to bend the laser beam with a beam pender so that it is parallel to the roll axis 11a.Also, without using a beam pender, it is possible to guide the laser beam so that it travels straight parallel to the roll axis 11a. A laser beam generator 31. A detector 35, etc. may be placed.Since the laser beam will be the measurement standard, it must be solid so that the position of these optical systems will not shift. Attach it to the stand.

Performance bowl system 4 using a microcomputer, etc.
1ij A signal corresponding to the measured value of distance xl (D is read from the signal processor 36'. A signal corresponding to the measured value of distance W%!+ is read from the control circuit 27a of the distance sensor 27. 26ij calculation control II iron m41
It is driven by a drive circuit 42 which receives predetermined signals in response to commands for forward rotation, reverse rotation, and stop. Further, a rotary encoder 43 is interlocked and connected to the motor 26, and emits a signal representing the position of the trolley 22 or the distance sensor 27 in the roll axis longitudinal direction, that is, a signal specifying the roll shape measurement position in the axis longitudinal direction, and performs arithmetic control. Read the device 41ii.

A rotary encoder 44 is also interlocked with the roll 11.
This output signal is input to the arithmetic and control unit [41] as data for specifying the roll shape measurement position in the circumferential direction.

In addition, as a method for specifying the roll shape measurement position yellow in the shaft length direction, in addition to using the rotary encoder 43 as described above,
It is also possible to use a pulse motor as a driving means and count the pulses for reversal by applying it to the motor.
Furthermore, it may also depend on the optical distance when using the KFi laser beam generator 31 as a laser light source.

Next, control by the arithmetic and control device 41 will be explained together with the fabrication of this device. When a reset command is given to the arithmetic and control device 41 by an operation means (not shown), the arithmetic and control device It
41 issues a predetermined signal to the drive circuit 42 to drive the motor 26.
1, and the output of the rotary encoder 43 determines the position (
When it is detected that the trolley 22 has reached the initial position), the motor 26 is stopped and an instruction to measure the generatrix shape of the roll is given to the arithmetic and control unit #L41. Along with the output of the signal to be rotated to the drive circuit 42, the arithmetic and control unit 41 transmits the outputs of the distance sensor 27 and the signal processor 36 to the rotary encoder 43.
Continuing in synchronization with the input from the laser beam, the distance to the roll surface based on the imaginary line that bisects the included angle of the laser beam, more precisely the frequency fly 't, and the included angle of the laser beam as the reference. (However, x2 can be positive or negative), and record this in the recording device 45 such as a two-link or a plotter in association with the position measured in the axial length direction by the wild goose sensor 2. The measurement record continues until the trolley 22 moves close to the end of the guide rail masonry 1j and the distance sensor 27 determines the IMII of the right end of the roll until the input from the rotary encoder 43 detects the calculation i:+control device 41. #Control. Moreover, when measuring the shape at another position in the circumferential direction of the roll, or the shape of a different generating line, it is sufficient to rotate the roll 11 and repeat the same operation.

Next, when measuring the axial cross-sectional profile of the roll, a necessary signal is given to the arithmetic and control unit 41 to move the cart 22 and the distance sensor 27 to the position where measurement is required. When the roll 11 is rotated slowly in this manner, the shape of the distance sensor 27 in the axial direction in front of and in the same direction is measured.

The arithmetic control unit 41 reads the output of the distance sensor 2"' 7 in synchronization with the input signal from the rotary encoder 44, calculates !, + The information is recorded in the recording device 45 in association with each other.

As described above, the present invention uses a light beam such as a laser beam as a measurement standard, and uses the guide rail 21, 21 corresponding to a conventional horizontal horizontal frame and the light beam of a distance sensor etc. guided by this rail. Since the deviation is corrected, the measurement accuracy is not affected by machining accuracy, installation accuracy, change over time 1, thermal deformation, etc. For this reason, accurate in-line roll shape measurement has become practical. That is, in the apparatus of the present invention, the laser beam generator 31. Interferometer 329 reflection Akatsuki 33
Only the part where the detector 35 and the like are fixed can be stably installed against imaging, thermal expansion, etc., and can be required at low cost. Maintenance work such as inspection of the guide rails is also simplified.

The present invention makes it possible to measure the shape of the roll with high accuracy while it is assembled into the mill housing, so it is possible to avoid wasteful roll replacement and replacement delays, and it is also possible to assemble the roll into the mill housing. Roll grinding in a crowded state is c.
The present invention has excellent effects such as improved iJ performance.

[Brief explanation of the drawing]

The first box shows an embodiment of the present invention, the first box in brown is a schematic plan view schematically showing the entire device of the present invention, and the second box is an explanatory view of the Fi displacement meter. 21.21...Guidance v-ru 22...Dolly 26.
...Motor 2F...Distance sensor 31...Laser beam generation 632-Interferometer 33.34a, 34b-Anti*
Jm35...Detector 41...Performance control device 4
3.44...Rotary encoder patent applicant Sumitomo Metal Industries, Ltd.

Claims (1)

[Claims] 1. While measuring the distance between the distance sensor and the roll surface by moving the distance sensor along the guide means e provided parallel to the roll axis and facing the roll surface, A roll shape measuring method characterized by projecting a light beam along the moving range of a sensor, measuring the eccentric position of the distance sensor and the original beam, and specifying the roll shape based on the results of both measurements. 2. A guide means provided parallel to the roll axis and facing the roll surface, a distance sensor that moves guided by the guide means and measures the separation distance from the roll surface, and the distance sensor
a deflection meter that projects a light beam along the moving range of the vehicle and measures the distance between the light beam and the distance sensor;
A roll shape measuring device characterized in that the roll shape is measured using measurement outputs of a distance sensor and a deflection meter.