JP2994535B2 - Hot steel profile measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a cross-sectional profile of a steel material such as a round bar or a square bar which is continuously rolled at an ironworks, for example, in a non-contact manner over its entire length.

[0002]

2. Description of the Related Art The cross-sectional profile of a continuously rolled steel material is measured by checking whether the cross-sectional dimensions are maintained,
It is very important to ensure the quality of the dimensions and shape of the steel material, such as whether or not a shape defect has occurred.

Conventional dimension / shape measuring means include a contact type and a non-contact type, and the former contact type measures a dimension at a predetermined position in a cross section using, for example, an outer path.
There is a method in which a piece of wood is applied to the surface of a steel material to form a baking mold and determine a shape defect. Further, as the latter non-contact type, there is a type which measures a cross-sectional dimension by applying a laser outer diameter gauge.

[0004] Among the above-mentioned measuring means, those using a non-contact type laser outer diameter meter are disclosed in, for example, Japanese Patent Application Laid-Open No. 3-257306. ， Install laser receiver,
The outer diameter of the material to be measured is measured from a laser beam partially shielded by the material to be measured.

[0005]

However, the measuring apparatus to which the above-mentioned conventional laser external diameter gauge is applied has the following disadvantages. When measuring the outer diameter, the dimensional accuracy is relatively good for a round material, the dimensional accuracy is good for a diagonal size for a square material, but the dimensional accuracy is bad for a diagonal size.

[0006] It is not possible to measure an accurate cross-sectional profile that can determine whether the rolling roll has started to bite due to poor rolling adjustment or poor shape due to poor thrust adjustment. It is not possible to measure a concave part called a bamboo shoot flaw generated at the corner of a square billet.

The present invention has been made in view of the above-mentioned problems, and provides a profile measuring apparatus capable of measuring a cross-sectional profile of an object to be measured during rolling with high accuracy and instantaneously over the entire length. It is intended to be.

[0008]

In order to achieve the above object, a hot steel profile measuring apparatus according to the present invention comprises:
A cross-sectional profile of a continuously rolled steel material, a hot steel profile measurement device that continuously measures in the rolling direction immediately after rolling, and moves in a horizontal direction in a cross section orthogonal to the rolling direction of the hot steel material. A possible trolley, a sensor frame disposed on the trolley and movable in a vertical direction in a cross section orthogonal to the rolling direction, and a diagonally positioned inner peripheral portion of the steel material passing through a central portion in the sensor frame. At least two two-dimensional laser distance meters arranged, and a data processing device for calculating a cross-sectional profile based on the measured values of these two-dimensional laser distance meters, wherein the sensor frame is made of a low thermal expansion material, and There is no cooling structure, and the two-dimensional laser distance meter is configured to be covered with a cooling jacket and a heat shield plate.

[0009]

The principle of measurement of the two-dimensional laser distance meter is as shown in FIG. 4, in which a laser beam output from a laser irradiation device 1 is diffused in a fan shape by a rod lens 2, and a band-like parallel light beam is transmitted by a cylindrical lens 3. To be measured 4
The light is radiated to the surface, and the irregularly reflected light is condensed by a condensing lens 5 and passed through a band-pass filter 6 so as to pass through a two-dimensional sensor 7.
And a so-called triangulation distance measurement method. In the case of this two-dimensional laser range finder, since it is a method capable of simultaneously measuring multiple points, a cross-sectional profile can be measured instantaneously with a localized value without scanning the sensor.

The hot steel profile measuring apparatus of the present invention measures the cross-sectional profile of the hot steel by calculation based on the multipoint distance from each of the two-dimensional laser rangefinders to the hot steel, thereby providing an arbitrary angle. In addition to the measurement of the outer diameter of the roll, it is also possible to measure the biting state due to the poor roll-down adjustment of the rolling roll and the shape failure due to the poor slide adjustment of the roll. Further, it is possible to measure a concave portion called a bamboo shoot flaw which is likely to be generated at a corner portion of the square billet, and it is possible to suppress the occurrence of a defective product due to a defective finish dimension of a rolled material or a defective product due to a defective shape.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot steel profile measuring apparatus according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a front view showing one embodiment of a frame structure of a hot steel profile measuring apparatus of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an overall schematic view of a hot steel profile measuring apparatus of the present invention. FIG.

In FIG. 1 to FIG. 3, reference numeral 11 denotes a bogie disposed immediately after the finish rolling mill and movable in a horizontal direction in a cross section orthogonal to the rolling direction of the hot-rolled hot-rolled steel material 12, for example, a self-propelled truck. The rotation of the output shaft of the servo motor 11a is transmitted to the reduction gear 11c via the chain 11b,
After that, the wheels 11e are rotated forward and reverse through the gear 11d to run on the rails 13 by themselves.

The carriage 11 is formed of a low-thermal-expansion material (for example, "amber"), and is supplied with cooling water into an internal hollow portion, and the cooling water circulates through the inside to cool the entire body. For example, a sensor frame 14 having an octagonal shape in a front view is provided. The sensor frame 14 is connected to the cart 11 via a screw jack 15.
It is guided by the LM guide 19 by transmitting the forward / reverse rotation of the output shaft of the lifting servomotor 16 installed on the carriage 11 to the screw jack 15 via the joint 17 and the connecting shaft 18. The two-dimensional laser distance meter 20, which will be described later, can be centered in the height direction in accordance with the dimensional change of the hot steel material 12 to be moved up and down and measured.

Reference numeral 20 denotes, for example, four two-dimensional laser rangefinders disposed on the inner peripheral portion of the sensor frame 14 at diagonal positions of the hot steel 12 conveyed on the inner peripheral side of the sensor frame 14. Be placed. Radiation heat from the hot steel slab 12 to the four two-dimensional laser distance meters 20 and the sensor frame 14 is applied to an inner peripheral portion and side surfaces of the sensor frame 14 except for a portion through which the hot steel material 12 penetrates. Heat shield plate 21 and cooling jacket 22 for shutting off
Is arranged.

Reference numeral 23 denotes the two-dimensional laser distance meter 20 described above.
Is a two-dimensional data distance conversion unit that inputs the distance from the two-dimensional laser distance meter 20 to the hot steel 12 measured by the above-described method, and converts these measured values to a distance value in the band direction of the laser by trigonometry, The data processor 24 calculates the cross-sectional profile of the hot steel 12 based on the multi-point distance data obtained from the two-dimensional data distance conversion unit 23, and displays it on the display 25.

Incidentally, reference numeral 26 in FIG.
e shows a scraper attached to the front and back to remove scale on the rail 13.

The hot steel profile measuring apparatus of the present invention has the above-described configuration, and when measuring the cross-sectional profile of the hot steel 12 conveyed from the finishing mill, first, a self-propelled servo is used. The two-dimensional laser distance meter 20 is centered in accordance with the dimensions of the hot steel material 12 to be measured by driving the motor 11a and the servomotor 16 for elevation.

In such a state, the multipoint distance from each two-dimensional laser distance meter 20 to the hot steel material 12 is measured using each two-dimensional laser distance meter 20. Then, the measured values are converted into the distance values in the band direction of the laser by the two-dimensional data distance conversion unit 23 by trigonometry, and then sent to the data processing device 24, where the cross-sectional profile of the hot steel material 12 is calculated. Are displayed on the display device 25. In the hot steel profile measuring apparatus of the present invention, when not in use, the carriage 11 is moved and retracted from the transport line.

[0019]

As described above, the hot steel profile measuring apparatus of the present invention measures the profile of a hot steel using a two-dimensional laser range finder, so that the cross section of the hot steel can be instantaneously and accurately obtained. Profile can be measured. Therefore, it is possible to measure the state of biting due to poor rolling adjustment of the rolling roll and to measure the shape failure due to poor sliding adjustment of the roll. Further, it is possible to measure a concave portion called a bamboo shoot flaw which is likely to be generated at a corner portion of the square billet, and it is possible to suppress the occurrence of a defective product due to a defective finish dimension of a rolled material or a defective product due to a defective shape.

Further, in the present invention, the sensor frame and 2
Since a heat shield and a cooling jacket are adopted as a heat shield measure of the two-dimensional laser distance meter, a sensor frame is made of low thermal expansion material and the shape is octagonal.
The measurement accuracy does not decrease due to the heat of the hot steel material.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a frame structure of a hot steel profile measuring apparatus according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an overall schematic explanatory view of a hot steel profile measuring apparatus according to the present invention.

FIG. 4 is a diagram illustrating a measurement principle of a two-dimensional laser distance type.

[Explanation of symbols]

 Reference Signs List 11 cart 11a self-propelled servo motor 12 hot steel material 14 sensor frame 20 two-dimensional laser distance meter 21 heat shield plate 22 cooling jacket 24 data processing device

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Mori 5-7-11 Tsukigaoka, Nishi-ku, Kobe-shi, Hyogo (56) References JP-A-62-140316 (JP, A) JP-A-4-148816 (JP, A) JP-A-2-176514 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01B 11/00-11/30 102 B21C 51/00

Claims (1)

(57) [Claims] 1. A hot steel profile measuring apparatus for continuously measuring a cross-sectional profile of a continuously rolled steel material in a rolling direction immediately after rolling, wherein the cross-section perpendicular to the rolling direction of the hot steel material is provided. A trolley movable in the horizontal direction, a sensor frame disposed on the trolley and movable in a vertical direction in a cross section orthogonal to the rolling direction, and a diagonal position of the steel material passing through a central portion in the sensor frame. At least two 2s arranged on the inner periphery of the frame
A two-dimensional laser range finder, and a data processing device for calculating a cross-sectional profile based on the measured values of the two-dimensional laser range finder. The sensor frame is made of a low thermal expansion material and has no cooling structure. The three-dimensional laser range finder is a hot steel profile measuring device characterized by being covered with a cooling jacket and a heat shield.