JPH01210811A - Band plate shape detecting device - Google Patents

Abstract

PURPOSE:To discriminate a C warp or a local elongation by providing a band plate, a displacement detector and an operation controller, etc. CONSTITUTION:On the downstream side of a leveler 1, deflector rollers 2, 3 are provided at a suitable interval in the upper and lower parts. Also, in a roughly middle part in the vertical direction of the deflector rollers 2, 3, two sets of non-contact type displacement detectors 5, 6 for measuring a distance to the surface of a band plate 4 are provided at a necessary fitting interval lS in the upper and lower parts. These detectors 5, 6 are provided with detector bodies 5a-5c, 6a-6c at a necessary interval in the width direction of the band plate 4, respectively. In this state, a value of a distance to the surface of the band plate 4 from the tip of the bodies 5a-5c, 6a-6c, which has been detected by the bodies 5a-5c, 6a-6c is sent to an operation controller 7. In the controller 7, a value of a plate warp is derived, and also, whether the plate warp is a C warp or a local elongation is discriminated, and its result is outputted as a command signal to a device to be controlled such as the leveler, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a strip shape detection device that can accurately measure strip warpage such as strip warpage and local elongation occurring in the strip width direction. It is.

[Prior Art] A leveler has conventionally been used to correct the flatness of a strip after rolling. (referred to as "C warpage") may occur.

For this reason, conventionally, a strip plate whose flatness has been corrected with a leveler is cut with a cutting machine in the subsequent process, and appropriate sampling is performed, and the C warp of the sampled plate is actually measured. Based on the results, the reduction amount of the leveling roll can be calculated. Adjustments are being made.

However, in the past, sampling of boards, actual measurement of C-warped roofs,
C. Adjustment of the rolls to prevent warping is done by workers.
Therefore, there were problems such as difficult work and poor safety.

Therefore, recently, various studies have been made to automatically and continuously detect the C warp and automatically control the C warp correction roll of the leveler according to the detected value.

Therefore, in order to eliminate C warp by automatically controlling the C warp correction roll, it is necessary to accurately measure the C warp of the plate sent out from the leveler, and it is necessary to accurately measure the C warp of the plate sent out from the leveler. It is necessary to distinguish whether this is local elongation such as edge elongation or mid-elongation.

[Problems to be Solved by the Invention] However, conventional strip shape detection devices have been unable to distinguish between C warpage and local elongation.

The present invention has been made in view of the above-mentioned circumstances and has an object to provide a strip shape detection device that can distinguish between C warpage and local elongation.

[Means for Solving the Problems] A first invention includes a plurality of displacement detectors disposed at a vertically moving part of the strip at required intervals with respect to the traveling direction of the strip, and a displacement detector for the plurality of displacement detectors. The second invention is equipped with an arithmetic and control device that calculates and outputs the width direction warp of the strip at multiple locations in the strip traveling direction at the same moment based on the values detected by the device. A plurality of displacement detectors are arranged at required intervals in the direction of movement of the strip, and the width at multiple points in the direction of movement of the strip at the same moment is determined based on the values detected by the plurality of displacement detectors. A third invention is a device for changing the spacing of the plurality of displacement detectors in the direction of travel of the strip in the first and second inventions, comprising a calculation and control device that determines and outputs directional plate warpage and local elongation. It has a configuration with

[Function] In the first invention, the warpage in the strip width direction at multiple locations in the strip traveling direction at the same instant is determined and output from the values detected by the plurality of displacement detectors, and the second invention In the third invention, the warping and local elongation of the strip in the width direction of the strip at a plurality of locations in the strip traveling direction at the same moment are determined and output, and in the third invention, the intervals between the plurality of displacement detectors in the strip traveling direction are determined and output. Adjusted according to plate thickness.

[Example] Hereinafter, the practical aspects of the present invention will be explained with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which, for example, deflector rolls 2.3 are disposed on the downstream side of the leveler I at appropriate intervals vertically. Deflector roll 2.
3 are arranged one above the other because the C warp occurring in the strip plate 4 is likely to become apparent when the strip plate 4 is vertically oriented.

Two sets of non-contact displacement detectors 5 and 6 for measuring the distance to the surface of the strip plate 4 are installed vertically at approximately the midpoint of the deflector roll 2.3 at a required interval of 15. It is set up. The displacement detectors 5 and 6 are arranged in three detector bodies 5a, 5b, 5c, and 6a at required intervals in the width direction of the strip plate 4, respectively.
, Bb, and Be.

The reason why the displacement detectors 5 and 6 are located in the vertically intermediate part of the deflector roll 2.3 is that the strip plate 4 is
, 3 is bent along the diameter of strip plate 4 (L-curvature) in the longitudinal direction to minimize the effect on C-curvature, and the displacement detectors 5 and 6 are installed at intervals. ! S is 1/2 of the wavelength of local elongation jp (see Figure 5)
to a certain degree. Wavelength of local elongation! Since p is approximately constant depending on the thickness of the strip plate 4, the installation is done at intervals! Once S is determined, there is no need to adjust it unless the thickness of the strip plate 4 changes.

Detector bodies 5a, 5b, 5c, Ga, 6 detected by each detector body 5a, 5b, 5c, Ba, 6b, 6c
b, Distance from the tip of Be to the surface of the strip plate 4 ysa r
ysb + ysc +y6a, Y6b, y
The value of 6c is sent to the arithmetic and control device 7, which calculates the value of the board warpage, discriminates whether it is board warp, C warp, or local elongation, and sends it to a controlled device such as a leveler. It can be output as a command signal.

Distance to the surface of the strip 4 detected continuously at short time intervals by the detector bodies 5a, 5b, 5c, Eia, Gb, and Oc YSar ysb+ ySC+ Y6a+
ysb.

y6C is sent to the arithmetic and control unit 7, and is sent to the displacement detectors 5, 5, and 5, respectively.
Board warpage ys at a certain moment at position 6.

y6 at the same time It is calculated as

Also, C warp yco when measurements are taken N times at a certain time interval
is calculated by , and is also calculated by local expansion when measurements are performed M times.

Formula (g) and [stock] medium α5, α6, β5. β61.
is a weighting coefficient, and if the plate warpage ys + y6 at a certain moment determined by equations (i) and (r+) are approximately equal, then the strip plate 4 will have a C warping has occurred, α5-α6 '': 1.0, β5-β6
<It becomes 1. Moreover, if the plate warpage VS and Y6 at a certain moment are not equal, local elongation has occurred in the strip plate 4 as shown in FIGS. 5 and 6 (a) and (b), and α5−α6〈〈1,
Becomes β5-β6 Toki 1.

Therefore, the arithmetic and control unit 7 calculates the equation (j) (of (liDOvl
By performing calculations, it is determined whether C warp or local elongation has occurred in the strip plate 4, and the values of C warp y cos local elongation MCI are determined, and the values of C warp ycos and local elongation MCI are determined, and according to these calculation results, the control unit 7 controls the A command signal is given to the device.

FIG. 7 shows another embodiment of the present invention, in which detector bodies 5a and 5b
, 5c, 6a, 8b, 8c attached frame 8.9
A vertically oriented screw shaft 10, which is provided with reverse threads at the top and bottom, is screwed together via a nut, and a drive device 11 is connected to the screw shaft 10.

When the thickness of the strip 4 is changed, the wavelength/D of the local elongation shown in FIG. 5 changes. For example, if the plate thickness increases, the wavelength i
If p becomes larger and thinner, it is the wavelength! p becomes smaller. Therefore, when mounting the displacement detectors 5 and 6, the interval 15 needs to be changed depending on the thickness of the strip plate 4. Therefore, in this embodiment, when the plate thickness changes, the mounting distance 15 is changed by driving the drive device 11 to rotate the screw shaft 10 and moving the displacement detectors 5 and 6 closer to or away from each other. . In this way, C warping can be achieved for any thickness of strip plate.
Discrimination of local elongation, C warpage, and measurement of local elongation can be performed.

FIG. 8 shows still another embodiment of the present invention, in which:
In this embodiment, in addition to the deflation crawls 2 and 3, deflation crawls 12 and 13 are provided, and the displacement detectors 5.6 are disposed on the same vertical plane of the strip plate 4.
After passing through the strip plate 4, the strip plate 4 is bent back to eliminate the influence of L warping, and the displacement detector 6 is provided on the front surface of the bent strip plate 4. In this case, when mounting the displacement detectors 5 to 6 along the strip 4, the distance 15 is n times the wavelength ip of the local elongation (n-0°1.2...+i
) wavelength! Let the distance be the sum of half of p. That is, even with such a configuration, it is possible to discriminate between C warpage and local elongation, and to measure C warp and local elongation.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the strip shape detection device of the present invention, it is possible to achieve the excellent effect of being able to distinguish whether the strip warpage occurring in the strip is C warping or local elongation, and also being able to determine its fireflies. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the strip shape detection device of the present invention, and FIG. 2 is the 1r1! Explanatory diagram of the displacement detector part of the device of J, 3rd
The figure is an explanatory diagram of C warping that occurs in the strip, and Figure 4 (a) is the third
Figure 4 (b) is a view in the direction of arrow A in Figure 3, Figure 5 is an explanatory diagram of local elongation in the strip, and Figure 6 (a) is a view in the direction of arrow II in Figure 3. FIG. 5 is a view taken in the direction of arrow A in FIG. 5, FIG. 6B is a view taken in the direction shown in FIG. FIG. 8 is an explanatory diagram of still another example of the strip shape detection device of the present invention. In the figure, 2 and 3 are deflector rolls, 4 is a strip plate, 5°6 is a displacement detector, 7 is an arithmetic and control unit, 10 is a screw shaft, 12.1
3 indicates a deflector roll.

Claims (1)

[Claims] 1) A plurality of displacement detectors are provided at a vertically moving part of the strip at required intervals in the direction of movement of the strip, and the values detected by the plurality of displacement detectors are A strip shape detection device characterized in that it is provided with an arithmetic and control device that determines and outputs the width direction strip warpage at a plurality of locations in the strip traveling direction at the same moment. 2) A plurality of displacement detectors are installed in the vertically moving part of the strip at required intervals in the strip traveling direction, and the values detected by the plurality of displacement detectors are used to calculate the displacement at the same moment. A strip shape detection device characterized by being provided with an arithmetic and control device that determines and outputs width direction warpage and local elongation at a plurality of locations in the strip traveling direction. 3) Claim 1) or 2) further comprising a device for changing the interval between the plurality of displacement detectors in the direction in which the strip travels.
The strip shape detection device described in .