JP4427336B2 - Reduction machine with flatness meter - Google Patents

Description

  The present invention relates to an apparatus and method for reducing and correcting a flatness while measuring a flatness of a steel plate or a metal strip.

  There is a roller straightening method for straightening metal bands, but many methods such as three-point bending and two-point bending using a spreader are also used. In the three-point bending method or the two-point bending method, deformation in the reverse direction occurs when the rolling is excessively reduced. Therefore, flatness measurement is required each time during the rolling reduction, which is an impediment to improving work efficiency.

For this reason, Patent Document 1 proposes a method of measuring a flatness by providing a concave surface under the pressure ram and installing a measuring instrument there. But this includes
1) The impact of the pressure ram and the material to be corrected, the deformation of the material to be corrected, or the collision impact during reverse warping propagates and the measuring instrument is destroyed.
2) Since the metal strip is straightened, a large load is applied to the pressure ram, so the pressure ram itself loses its durability unless the space for installing the measuring instrument is kept small.
There were problems such as. That is, it can be said that the method of Patent Document 1 in which the measuring instrument is directly connected to the pressure ram has an unsolved problem in practice.

Furthermore, when the measuring instrument breaks down and is replaced, the pressurization ram of the drafting machine is heavy because it corresponds to a large load, and the work entering the lower surface of the pressurization ram is dangerous. Preliminary preparations such as preventing the pressure ram from dropping also increase the trouble of replacement work.
Japanese Patent Laid-Open No. 05-237546

  The object of the present invention is to attach a flatness meter that does not deteriorate or break the accuracy of the measuring instrument, does not impair the strength of the pressure ram, improves the working efficiency, and does not reduce the accuracy of the product. It is to provide a press straightening device.

The present inventor has been led by earnest research on the above problems, and the gist thereof is as follows.
(1) A device for straightening a metal band, which is arranged in one direction along the surface of the metal band and / or in a direction intersecting with the pressure ram for pressing down the metal band to be corrected. A plurality of distance meters that measure the distance in the normal direction of the surface of the metal band, and a flatness meter having a calculation means for obtaining flatness from a distance measurement value group obtained from the distance meter,
The pressure ram has a notch groove on the surface facing the metal strip,
The frames for holding the plurality of distance meters are connected to each other, and suspended on the pressure ram via a vibration isolator,
The frame is inserted into the notch groove without contacting the pressure ram,
In addition, a flatter-equipped rolling reduction machine comprising a display unit for displaying a distance to the metal strip measured by the distance meter and a calculation result of the calculation unit.
(2) A device for straightening a metal strip, which is arranged in one direction and / or at a right angle along the surface of the metal strip and a pressure ram for straightening the metal strip to be straightened. A plurality of distance meters for measuring the distance in the normal direction of the surface of the metal band, and a flatness meter having a calculation means for obtaining flatness from a distance measurement value group obtained from the distance meter,
The distance meter is a distance meter using laser light, ultrasonic waves, eddy current, or a retractable stylus,
The pressurization ram has a horizontal hole penetrating in the horizontal direction and a coffin hole penetrating from the surface facing the metal strip to the horizontal hole,
Frames holding the plurality of distance meters are connected to each other, and suspended on the pressure ram via the vibration isolator,
The pressure ram accommodates a part of the frame in a horizontal hole without contacting the frame,
Measurement light, measurement sound wave, eddy current, or advancing and retracting stylus of each distance meter held in the frame is inserted into the hole,
Furthermore, a flatter-equipped rolling reduction machine comprising a display unit for displaying a distance to the metal strip measured by the distance meter and a measurement result of the calculation unit.
(3) A frame housed in the horizontal hole holds the distance meter via a plurality of saddle frames,
The rolling correction machine with a flatness meter according to (2), wherein the heel frame is housed in the pit hole together with the distance meter.
(4) The flatness according to (2) or (3), characterized in that the distance meter or the distance meter and the heel frame have a joint structure that is detachable inside the horizontal hole and the frame accommodated in the horizontal hole. A pressure reduction machine with a meter.
(5) In the method for correcting a metal body using the flattening machine with a flatness meter according to any one of (1) to (4), the flatness of the metal strip is measured and presented from the display means. Immediately after unloading the pressure ram, measure the flatness with a flatness meter, display the calculation result on the display means, and repeat the reduction and flatness measurement until the flatness falls below the target value. A method for correcting the reduction of a metal strip, which is characterized by the above.

By using the method of the present invention, the following effects can be obtained.
1) Since the flatness meter can be installed in the pressure ram via a vibration isolator, it becomes a flatness meter that is not damaged by shock vibration and the like, and at the same time, it is possible to improve the efficiency of continuous work.
2) The decrease in strength of the pressure ram could be minimized.
further,
3) Since the installation location of the distance meter can be freely set, distance meters of various methods and characteristics can be used, and the measurement distance range can be reduced, so that an inexpensive flatness meter can be configured.
4) Maintenance and replacement of individual distance meters became possible with the pressurization ram still installed in the line, and the operating cost could be reduced.
5) Since the driver can recognize the flatness during the rolling reduction, it is easy to determine the end point of the rolling reduction, and the correction work can be shortened.
6) Since the evaluation range of the flatness meter can be set to the measurement range of the conventional method, the flatness meter of the present invention can obtain the same measurement accuracy as the conventional method.

The rolling reduction machine used in the present invention has a configuration in which the shape is corrected and the flatness is obtained by bending the metal band 7 with the laying bar 6 sandwiched between the metal band 7 and the pressure ram 1. is there.
FIG. 1 is a perspective view showing an outline of claim 1 of the correction apparatus of the present invention.
In many cases, the pressurization ram 1 is composed of a thick steel plate welded structure in order to cope with a high rolling load, and a portion in contact with a metal strip to be a straightened material is composed of a 200 to 300 mm thick steel plate.
A frame 3 holding a distance meter is contained in a notch groove 8 on the lower surface of the pressure ram 1. The frame 3 is suspended on the pressure ram 1 via the vibration isolator 2.

  FIG. 2 is a perspective view showing a part of components such as the pressure ram 1 of FIG. A distance meter 4 held by the frame 3 in the notch groove 8 on the lower surface of the pressure ram 1 measures the distance to the surface of the metal strip. The distance meter 4 can be maintained and replaced from the lower surface of the pressure ram 1.

FIG. 3 is a perspective view showing an outline of claim 2 of the correction apparatus of the present invention.
Near the center of the pressure ram 1, a through hole 9 is provided in the horizontal direction in the horizontal plane, and a part of the frame 3 holding this distance meter (this part is also a horizontal frame) is inserted into the through hole 9. . The frame is suspended on the pressure ram 1 via a vibration isolator 2.

  The through-hole 9 is intended for the insertion of the frame 3 holding the distance meter 4 and need not be in a horizontal plane as long as the distance from the surface of the metal band 7 can be measured.

  FIG. 4 is a perspective view showing a part of components such as the pressure ram 1 of FIG. From the distance meter 4 inserted in the lateral hole 9 of the pressurizing ram 1, a saddle hole 10 through which the measurement medium is passed is provided on the surface of the metal band so that measurement is possible.

In the pressurization ram 1 shown in FIG. 3, the notch on the bottom surface of the pressurization ram 1 is only the pit 10. The loss of the constituent members of the bottom surface portion of the pressure ram 1 that is closest to the material to be corrected (the metal strip 7) can be made smaller than that of the notch groove 8 shown in FIG.
The frame 3 can be detachably attached to a portion inserted in the horizontal hole 9 (horizontal frame) and a portion suspended from the pressure ram 1 via the vibration isolator 2 via a fastener such as a bolt and nut. It is configured. Since the distance meter 4 is held in the portion inserted into the lateral hole, the individual distance meters 4 can be maintained and replaced while the pressure ram 1 is installed in the correction work area.

FIG. 5 is a perspective view showing an outline of claim 3 of the correction apparatus of the present invention.
The pressurization ram 1 is provided with a through hole (horizontal hole) 9 in the horizontal direction in the horizontal plane near the center thereof, and a horizontal frame (a part of the frame 3) 11 is inserted into the horizontal hole 9. In addition, the pressure ram 1 is provided with a hole 10 so as to reach the horizontal hole 9 from the lower surface side in a direction orthogonal to the horizontal frame 11. The rod frame 12 holding the distance meter 4 is inserted along the rod hole 10. The end of the eaves frame 10 passing through the eaves hole 10 and coming into the horizontal hole 9 is held by the horizontal frame 11, so that the eaves frame 12 is fastened to the horizontal frame 11. The entire frame 3 is suspended from the pressure ram 1 via a vibration isolator 4.

  Since the pit hole 10 and the horizontal hole 9 are intended to insert the horizontal frame 11 and the heel frame 12, if the measurement purpose such as measurement accuracy can be satisfied, it is not necessary to be in the normal direction of the metal band or in the horizontal direction. The pothole 10 and the horizontal hole 9 do not need to be orthogonal if they intersect appropriately.

  As a fastening method for the saddle frame 12 and the horizontal frame 11, for example, a method in which the horizontal frame is divided into two in the axial direction and the saddle frame is sandwiched is effective. A method or the like is also applicable.

  6 is a perspective view showing a part of components such as the pressure ram 1 of FIG. A distance meter 4 is installed at the lower end of the saddle frame 12 inserted in the saddle hole 10 of the pressure ram 1, and the distance from the distance meter 4 to the surface of the metal band 7 is measured.

  In many cases, since the outer shape and size of the distance meter 4 are proportional to the measurement distance range, the measurement distance range of the distance meter can be reduced according to the method shown in FIG. For this reason, the size of the hole can be set to the same level as the method shown in FIG. Therefore, the pressurization ram shown in FIG. 5 can have less member loss than the notch groove shown in FIG.

  Since the saddle frame 12 can be fastened and opened with the lateral frame 11 from the outside of the pressurization ram 1, the individual distance meters 4 can be maintained and replaced while the pressurization ram 1 is installed in the line. When a plurality of heel frames 12 are held by one set of horizontal frames 11, in addition to the present apparatus, a plurality of heel frames 12 held by one set of horizontal frames 11 are held at the opposite end. If a jig is created in advance, efficient replacement work becomes possible.

  A plurality of distance values measured from the flatness meter of the present invention are transmitted to a calculation means (not shown), converted to flatness and calculated, and presented to the driver by a display means (not shown). In many cases, the operation of the pressure reduction device is performed in a cab far from the pressurization ram, so that the calculation means and the display means are installed in the cab.

  The example of the thick board corrected using the apparatus of this invention is shown. A thickness plate having a thickness of 5 to 200 mm, a width of 800 to 3000 mm, and a length of 1000 to 9000 mm was corrected, and the flatness could be achieved with an accuracy of about 0.5 mm, which is the same as that of conventional manual measurement. In addition, the correction work with a flatness meter of the present invention was carried out for half a year, and there was no failure or breakage of the measuring instrument. On the other hand, applying the method disclosed in Patent Document 1, a conventional machine without a vibration isolating mechanism such as a vibration isolator or a frame was damaged in three months.

  In the correction work with the flattering machine with the flatness meter of the present invention, an efficiency improvement of about 20% was seen compared to the conventional flatness manual measurement.

  In the conventional measurement of the shape of a thick steel plate, the flatness evaluation is performed by contacting a reference linear ruler within an arbitrary range of 1 to 2 m and evaluating the gap between the reference surface and the surface to be measured. In consideration of the conventional method, the flatness measurement of the present invention has a measuring instrument range of 1 to 2 m. Therefore, the same measurement can be performed, and the flatness meter of the present invention can obtain the same measurement accuracy.

FIG. 2 is a perspective view showing an outline of claim 1 in the correction apparatus of the present invention. FIG. 3 is a perspective view showing a part of components such as a pressure ram of the correction device according to claim 1 of the present invention cut away. It is a perspective view which shows the outline | summary of Claim 2 in the correction apparatus of this invention. It is a perspective view which cut | disconnects and shows some components, such as a pressurization ram, of the correction apparatus of Claim 2 of this invention. It is a perspective view which shows the outline | summary of Claim 3 in the correction apparatus of this invention. It is a perspective view which cut | disconnects and shows some components, such as a pressurization ram, of the correction apparatus of Claim 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressurization ram 2 Vibration isolator 3 Frame 4 Distance meter 5 The path | route which the measuring medium of a distance meter propagates 6 Laying bar 7 Metal band 8 Notch groove 9 Horizontal hole 10 Recessed hole 11 Horizontal frame 12 Reed frame

Claims (5)

An apparatus for flattening a metal strip, the pressurizing ram for reducing the metal strip to be straightened, and a one-way along the surface of the metal strip and / or arranged in a direction crossing the same A plurality of distance meters for measuring the distance in the normal direction of the surface of the metal strip, and a flatness meter having a calculation means for obtaining flatness from a distance measurement value group obtained from the distance meter,
The pressure ram has a notch groove on the surface facing the metal strip,
The frames for holding the plurality of distance meters are connected to each other, and suspended on the pressure ram via a vibration isolator,
The frame is inserted into the notch groove without contacting the pressure ram,
In addition, a flatter-equipped rolling reduction machine comprising a display unit for displaying a distance to the metal strip measured by the distance meter and a calculation result of the calculation unit. An apparatus for flattening a metal band, wherein the metal is arranged in one direction and / or at a right angle along the surface of the metal band, and a pressure ram for straightening the metal band to be corrected A plurality of distance meters for measuring the distance in the normal direction of the surface of the belt, and a flatness meter having a calculation means for obtaining flatness from a distance measurement value group obtained from the distance meter,
The distance meter is a distance meter using laser light, ultrasonic waves, eddy current, or a retractable stylus,
The pressurization ram has a horizontal hole penetrating in the horizontal direction and a coffin hole penetrating from the surface facing the metal strip to the horizontal hole,
Frames holding the plurality of distance meters are connected to each other, and suspended on the pressure ram via the vibration isolator,
The pressure ram accommodates a part of the frame in a horizontal hole without contacting the frame,
Measurement light, measurement sound wave, eddy current, or advancing and retracting stylus of each distance meter held in the frame is inserted into the hole,
Furthermore, a flatter-equipped rolling reduction machine comprising a display unit for displaying a distance to the metal strip measured by the distance meter and a measurement result of the calculation unit. A frame housed in a horizontal hole holds the distance meter via a plurality of heel frames;
3. The rolling reduction machine with a flatness meter according to claim 2, wherein the heel frame is accommodated in the pit hole together with the distance meter.   4. The rolling reduction with a flatness meter according to claim 2, wherein the distance meter or the distance meter and the heel frame have a joining structure that is detachable inside the horizontal hole and the frame accommodated in the horizontal hole. Machine. In the correction method of the metal body using the rolling reduction machine with a flatness meter according to any one of claims 1 to 4,
Measure the flatness of the metal strip, present it from the display means, immediately after unloading the pressure ram, measure the flatness with a flatness meter, and display the calculation result on the display means. The method for reducing the metal belt by reducing the reduction and flatness until the value of the metal band becomes equal to or less than a target value.

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