JPS5899707A - Method for measuring roll alignment - Google Patents

Abstract

PURPOSE:To obtain the accurate roll alignment readily, by obtaining actually measured roll contact point coordinates in a specified coordinate system, correcting the values by the initial value of the central angle between the rolls, thereby correcting the slant angle. CONSTITUTION:A slant angle phi of a measuring instrument is detected. The contact point coordinates in the coordinate system determined by the configuration of the measuring instrument is measured. The contact point coordinates in the coordinate system is corrected into the coordinates in the specified coordinate system. The contact point coordinates in the specified coordinate system are corrected based on the initial value of the central angle between the rolls, and the alignment of the entire roll group is obtained. In the case of, e.g., detecting the slant angle phi of the measuring instrument, the slant angle phi is determined by the slant angles of three rolls phi1, phi2 and phi3, when the three rolls are measured by the measuring instrument by one time. For example, the first slant angle is obtained by the expression in the Figure, where L is a distance between a pair of scales, and l is a distance from the end part of the scale to the contact point of the roll.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring q-lue alignment of a continuous casting machine.

The roll alignment of continuous casting machines requires strict precision because it does not significantly affect the quality of slabs. Therefore,
As shown in Figure j11, #211, roll cavity C
The alignment of the entire group of rolls was determined by converting the coordinates of each roll in a coordinate system determined by the jIII constant superior shape to a specific coordinate system using a measuring instrument l that can pass through the center and a calculation device.

ζ Here, the measuring instrument 1 has a linear measurement position detection device 2, a curved R gauge 3, a gap sensor 4, and a fixing device 5.

In such a measuring method, the measuring instrument 1 is fixed by the fixing device 5 so as to be perpendicular to the slope, but as shown in FIG.
If the angle ψ is tilted with respect to K, the following effects will appear on the measured values: If the roll is aligned on the cow 111clcIR, the four-ru SO envelope line will be as shown in Fig. 4. As shown in the figure, if the origin is the contact point M of contact point M, B, and C, and the center of the circle that is the enveloping line is set on the V axis, then tx"+ (y -10000)"m 10000"・
・・・・・・Represented by (t), if the measuring instrument l is tilted, the coordinates of B and C will be larger than when the inclination is 0°, and the diameter of the curvature will be larger than actually. value. For example, the actual 1ll
If the I rate radius is 1000-21°, 3■, ψ; 10
It would be measured 5101m larger at 5101m.

This invention was proposed in view of these circumstances.
The purpose is to provide a measuring method that makes it easier to obtain a more accurate roll alignment when the tilt is corrected.

The present invention will be described below based on an illustrated embodiment. When the measuring device 1 is tilted by an angle ψ with respect to the 2-in center line LO, the locus of the measurement 1 measured value O envelope of the senna 4 is 1
Ii5rE, IK6 It becomes an ellipse as shown in the diagram. If the rolls are aligned on a perfect circle and the tilt of the measuring device 10 is 00, the self-measured value envelope line will draw a perfect circle, but measurement! ! ! When l is tilted by ψ, the major axis is 2 R as shown in FilK7m.
/gosψ, an ellipse with M1 diameter of 2R will be drawn.し9katch, measured value σ(zc'e yctsu→C'(@
Accurate roll alignment can be obtained by performing tilt correction such as C'S i/c. In rounding to perform such measurements, ■ detect the inclination angle ψ of the measuring device 1, ■ measure the contact point coordinates in a coordinate system determined by the shape of the measuring device 1O, and ■ specify the contact point coordinates in the coordinate system. Convert to the coordinates in the coordinate system, and (1) correct the coordinates of the 011 points in the specific coordinate system based on the initial value of the center angle between the rolls to obtain the 72 element of the entire a-ru evaluation.

■Detection of the inclination angle of the measuring device lo This embodiment is for measuring three rolls at once with the measuring device xK as shown in the 1m5 diagram. Determine the inclination angle ψ based on ψ3. For example, -I Bm -jtt
) (the distance between the scales of the L knee pair, the distance from the end of the t knee scale to the p-le contact point).

■ Measurement of contact coordinates in the measuring instrument coordinate system As shown in Fig. 8, from one measuring instrument 1, the contact point 1 [A (gm) is determined from the coordinate system determined from the shape of the measuring instrument.

ym), B (II'B* WB), C'('He
f) is obtained. Since tilt correction cannot be performed in such a coordinate system, next, conversion to the specific locus Ili system is performed, but prior to this, the following assumptions are made.

As shown in FIG. 9, it is assumed that the roll does not move in the lateral direction, but moves on a radial line connecting the normal roll position and the center O, and the roll center angle does not change. Therefore, the center angle θ between the rolls when the measuring instrument inclination is 0° is determined in advance, and this − is set as an initial value.

In addition, determine which two rolls the measuring device is in contact with based on the measured value of the gap sensor, and then determine the bisector of the central angle of the two rolls to be used as a cough guard (the two rolls with constant value M1%). ) is the V-axis. - Here, the measuring instrument, as shown in the j110 diagram. A case will be described in which the contact point M is in contact with the roll person and B, and the bisector of the central angle of B is the V axis, but the same concept can be used even if the bisector of the central angle of B is in contact with the roll person and C.

■ Conversion to a specific coordinate system In Figure 10, the contact point coordinates B and C of the screw with an inclination of 110°
is expressed as follows using initial values #1° and #~.

If you express it as , you get seven. Point I on this ellipse.

It is expressed as follows.

By substituting this value into the formula, sσ becomes as follows.

Then, becomes.

The contact point coordinate A' in such a specific m reference system.

l and σ are calculated as follows using the above #1 reading '. Correction of Measured Values B' is added to the contact point coordinates expressed as above.

σ is corrected using roll center angle initial values #1 and #2 (see 11th wA).

That is, 0JIIIl after correction is as follows.

As shown in step 5 above, the actual roll contact coordinates &, If, σ in the specific coordinate system are determined, and these values are calculated as − the initial value of the center angle between the rolls.
Accurate 4-Luer 2 moment can be easily obtained by simply correcting the angle.

As described above, according to the present invention, it is possible to easily obtain accurate roll alignment without adding any special equipment, which is extremely beneficial for the roll tube layer.

Further, in this embodiment, for the sake of simplicity, the case where three rolls are measured has been described, but of course it can be carried out in the same manner when measuring four or more rolls.

[Brief explanation of drawings]

1 and 2 are a front view and a plan view showing an example of a measuring device used in the measuring method according to the present invention; FIG. 6 is a plan view showing the tilting state of the line measuring device; and FIG. is an explanatory diagram showing the error in measured values due to the above-mentioned slope, the JIs diagram is a perspective view showing the measured value envelope, FIG. 6 is a similar conceptual diagram, and the jIZ diagram is the slope Qo and the envelope J11 [of Showing the relationship Nag 27, 8th
9 is a schematic diagram showing the movement of the roll, FIG. 10 is a graph showing a specific coordinate system, and FIG. 11 is a graph showing tilt correction. 1... Measuring device, 2... Measurement position detection device, 3... R gauge, 4... Gap sensor, 5... Identification Device. Patent Applicant Sumitomo Metal Industries Co., Ltd. Agent Tomo Hisakado Figure 1 Figure 3 ψ Figure 5 Figure 6 Figure 7 Figure 10 Me

Claims (1)

[Claims] (1) When measuring the inclination angle of the measuring instrument with respect to the line center line, the measuring instrument measures the roll contact coordinates in a coordinate system determined from the regular shape, and specifies the roll contact coordinates in the coordinate system. A method for measuring p-ru alignment, characterized in that the coordinates are converted into coordinates in a coordinate system, and the roll contact coordinates in the specific coordinate system are corrected based on the initial value of the central angle between the rolls.