JPH0682043B2 - H-section steel dimension measurement method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for measuring the dimension of an H-section steel, and in particular, not only when the H-section steel to be measured is in a stationary state, but also when it is in a running state ( It proposes a method that enables continuous and accurate measurement regardless of whether it is hot or cold.

(Prior Art) As a method for measuring the dimensions of H-section steel hot and continuously during running, Japanese Patent Laid-Open No. 57-110901 discloses a measuring method based on the center deflection, and Japanese Patent Laid-Open No. 57-110901. -144404 discloses a method and apparatus for measuring the dimension of H-section steel such as center deviation (web deviation), and JP-A-58-179515 discloses a method for measuring center deviation and flange width. Each is disclosed.

However, in JP-A-57-110910, since a water column type ultrasonic distance meter is used, in order to measure the maximum value of the flange width, the guide accuracy for preventing lateral shake of the measured material is extremely high. Will need to be improved. That is,
The water column diameter of the water column type ultrasonic distance meter is practically about 20 mmφ,
If the material to be measured causes lateral shake, the position to be measured may be displaced and measurement may not be possible. Further, since water is used for the measurement, the water gets on the surface of the web, the cooling of the web is accelerated, the temperature difference between the flange and the flange becomes large, and a web wave is generated in the thin H-section steel, There is a problem that the web part rusts due to water leakage.

On the other hand, in Japanese Unexamined Patent Publication (Kokai) No. 57-144404, the measuring method uses a light cutting method from the upper and lower sides and the left and right sides
With this method, the measurement accuracy is poor, and naturally, the calculation accuracy of the deviation of the center is also poor. In addition, since measurement is difficult in an environment where water drops, water vapor, etc. are present, there is a problem in measurement in the immediate vicinity of a rolling mill (hot rolling).

Further, JP-A-58-179515 discloses a CCD (Charge Coupled Devices) mounted on a box-shaped bridge guide.
It is a method to detect the flange width with an image sensor such as, and measure the deviation of the center and the web thickness from the measured value with the water flow ultrasonic range finder also attached to the bridge guide. It is necessary to provide guidance, and there is no margin for lateral runout of the material being measured.Therefore, the bridge guide itself should be strong and the guides on the input and output sides should be secured to prevent lateral runout. If not, the equipment may be damaged, and even if the equipment is strengthened,
Vibration of the bridge guide and the sensor attached to the bridge guide causes a problem such as deterioration of measurement accuracy.

In addition, these disclosed examples do not correctly measure the flange edge shape to measure the maximum value of the flange width, so that there is also a problem that the measurement accuracy is deteriorated accordingly.

(Problem to be Solved by the Invention) In the present invention, in the dimension measurement of H-section steel, the flange edge shape is accurately detected even during hot running such that the material to be measured has lateral shake, Maximum width,
And, it is intended to measure the deviation of the center with high accuracy.

The flange edge shape of H-section steel is shown in Fig. 3, a, b,
C and D have various shapes as shown in the representative examples.

On the other hand, when the dimensions of the H-section steel are measured during traveling, as described above, lateral deflection occurs in the measured material during traveling,
This lateral shake cannot be completely stopped.

Therefore, in order to accurately measure the maximum value of the flange width, it is important to correctly grasp the edge shape of the flange portion even if the measured material has lateral shake.

Here, the deviation S of the center of the H-section steel is a value calculated by the following equation from the leg length dimensions shown by b ₁ and b ₂ in FIG.

Therefore, in order to obtain the value of the center deviation S with high accuracy, the edge shape of the flange is correctly grasped and the leg length dimensions b ₁ , b
It is important to measure ₂ accurately.

(Means for Solving the Problem) The present invention is capable of coping with lateral shake of the material to be measured,
In addition, by accurately grasping the shape of the flange edge, the dimensions of the H-section steel can be accurately measured even during hot running. The gist is that the H-section steel is measured in the flange width direction. The pair of two-dimensional rangefinders and the pair of one-dimensional rangefinders are arranged so as to face each other across the flange and the web, and the vertical distances to the opposing flanges are measured in the two-dimensional rangefinder. A dimension measuring method for H-section steel, characterized in that the deviation of the center, the flange width, and the thickness of the web are calculated at the same time by measuring the vertical distances to the opposing webs with a one-dimensional distance meter. is there.

Here, the two-dimensional rangefinder and the one-dimensional rangefinder are preferably laser rangefinders.

That is, by using a laser range finder, it is advantageous not only that the measurement accuracy is good and that it can withstand the environment of a rolling mill such as heat, and that it is compatible, and therefore there are many measurement points such as shaped steel.

(Operation) First, the selection and arrangement of the sensors and the calculation logic in the present invention will be described.

FIG. 1 is an explanatory view showing the arrangement of sensors and the measuring procedure.

As shown in Fig. 1, a pair of sensors A ₁ and A ₂ that measure the distance to the flange are arranged so as to face each other in the direction sandwiching the flange width, and the measurement can be performed even when the measured material has lateral shake during running. You can
Moreover, since it is necessary to correctly grasp the shape of the flange edge, a two-dimensional laser rangefinder suitable for this purpose is used. Here, an explanatory diagram of the measurement principle of the two-dimensional rangefinder The features will be described.

In FIG. 4, the laser beam from the He-Ne laser oscillator is projected as a band-shaped laser beam by the collimator 13 onto the flange portion of the H-section steel 11, and the laser beam diffusely reflected by the flange section of the H-section steel 11 is lensed. It is captured by 14, and received by a two-dimensional image sensor 15 in which a large number of detection elements are arranged vertically and horizontally. By doing so, the flange edge shape can be correctly grasped, and the maximum value of the flange width can be measured.

In addition, in Fig. 4, the measurable range is shown by the dotted line, but since it can be made sufficiently wider than the flange width of the H-section steel 11 in this way, it occurs while the H-section steel 11 is running and the lateral deflection occurs. The tolerance range for can be set large.

On the other hand, a pair of sensors that measure the distance to the web surface.
C ₁ and C ₂ use a one-dimensional laser range finder and are arranged to face each other in a direction sandwiching the web surface.

In this case, a two-dimensional laser range finder may be used, but it is desirable to use a one-dimensional laser range finder because the accuracy is reduced.

By combining and measuring these rangefinders, from Fig. 1, The respective dimensions are calculated by the respective equations of.

The sensor A ₁ -A ₂ and the sensor C ₁ -C ₂ have the same interval L in FIG. 1, but the intervals may be different.

A pair of these sensors A ₁ and A _{2 and} a pair of sensors C ₁ and C ₂ are set as one set, and A ₃ , A ₄ (not shown) and C ₃ are also shown on the right side of the drawing in FIG. By arranging a pair of sensors C, C ₄ (not shown), it is possible to measure the deviation of the center and the thickness of the flange width web on both sides of the H-section steel.

Since the resolution of the rangefinder is the measurement accuracy, the positional relationship between the sensor and the object to be measured is important.

Therefore, in order to maintain the measurement accuracy, it is desirable to move and set the sensor to the optimum position according to the shape dimension of the H-section steel.

That is, there are typical H-section steel sizes, such as H400 × 150 to H900 × 300… narrow width type H300 × 300 to H500 × 500… wide width type, but the sensor is moved according to the flange width and web height. A mechanism that allows the sensor to be moved and set to the optimum position.

Further, when the height of the web is small and the sensors are too close to each other to interfere with each other, it is possible to measure by shifting the phase.

That is, it is only necessary to shift the interfering sensors by the phase difference in the longitudinal direction of the material to be measured. In this case, the measurement position is different in the longitudinal direction of the material to be measured. PLG (Pulse Generato
You can re-calculate the data by counting the length with r).

Next, the system configuration will be described with reference to FIG.

FIG. 5 is an explanatory view showing the system configuration, and each sensor main body
A _1, the signal from _{A 2, A 3, A 4} , C 1, C 2, C 3, C 4 is sent to the rangefinder units respectively, wherein out a distance value, these distance values is more arithmetic units Then, the deviation of the center and the thickness of the bulge width web are calculated.

(Embodiment) An embodiment of the present invention will be described with reference to FIG.

FIG. 6 is an explanatory view of the present invention, and shows the mounting and moving mechanism of each sensor of the H-section steel dimension measuring device.

The sensors 1-1, 1-2, 1-3, 1-4 are a combination of a two-dimensional rangefinder sensor and a one-dimensional rangefinder sensor (not shown).

These sensors 1-1 and 1-3 are sensor frames 5
-1, sensor 1-2, sensor frame 5 is sensor frame 5
-2 are slidably attached (not shown) so that the sensor can be moved in the lateral direction.

Further, the sensor frame 5-1 has a sliding guide 4-
1, 4-3 and the sensor frame 5-2 are attached to the bogie frame 2 via the sliding guides 4-2 and 4-4, and the sensor frame and the sensor attached thereto can be moved in the vertical direction. It is possible.

Next, the lateral driving of the sensor and the detection of the movement amount are performed by a motor / celsin. That is, the motors Celsin 6-1 connects the sensors 1-1 and 1-3 through the screw shaft 7-1,
Motor shaft 5-2, screw shaft 7
The sensors 1-2 and 1-4 are moved via -2 to detect their positions.

It should be noted that the screw shafts 7-1 and 7-2 are respectively provided with reverse threads, and the sensors 1-1 and 1-3, 1-2 and 1-4 with respect to the rotation of the screw shaft in a certain direction. Are designed to move in opposite directions. Further, the motors / cercines 6-1 and 6-2 can be synchronized with each other.

Using these lateral movement mechanisms, the material to be measured, that is,
The horizontal position of the sensor is set to the optimum position according to the height of the H-section steel 11.

On the other hand, in the vertical direction, the sensors 1-1, 1-3 are vertically moved by the motor celsin 8-1 via the worm speed reducers 9-1, 9-3 and the screw shafts 10-1, 10-3.
However, the motor 1-21 moves the sensors 1-2, 1-4 through the worm speed reducers 9-2, 9-3 and the screw shafts 10-2, 10-4.

Further, the motors and celsins 8-1 and 8-2 can be synchronized with each other.

Using these vertical movement mechanism,
The vertical position of the sensor is set to the optimum position according to the side of the H-shaped steel 11.

The position setting actuator is a motor, but a hydraulic motor, a position setting cylinder, or the like may be used.

In addition, the bogie frame 2 can be moved by using the motor / celsin 3 as a driving source, and online,
It also enables offline measurement.

(Effect of the Invention) This invention combines a two-dimensional rangefinder and a one-dimensional rangefinder,
Increase the tolerance for lateral shake of the measured material during running,
Further, it is a dimension measuring method for H-section steel which is excellent in measurement accuracy by sufficiently grasping the shape of the flange edge, and by using the method of the present invention for quality assurance means, improvement of quality and yield Can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the arrangement and measurement procedure of a sesen, FIG. 2 is an explanatory view of the dimension definition of H-section steel, and FIG. 3 is a cross-sectional view showing the flange edge shape of H-section steel, FIG. 4 is an explanatory view showing the measuring principle of the two-dimensional laser range finder, FIG. 5 is an explanatory view showing the system configuration, and FIG. 6 is mounting and moving of each sensor of the H-section steel dimension measuring device. It is explanatory drawing which shows a mechanism. A ₁ , A ₂ , A ₃ , A ₄ …… 2D distance sensor C ₁ , C ₂ , C ₃ , C ₄ …… 1D sensor 1-1,1-2,1-3, 1-4 …… Sensor (a combination of a two-dimensional rangefinder sensor and a one-dimensional rangefinder sensor) 2 …… Bogie frame 3 …… Motor Celsin (for bogie movement) 4-1,4-2,4- 3,4-4 …… Sliding guide 5-1,5-2, …… Sensor frame 6-1,6-2 …… Motor celsin (for lateral movement of sensor) 7-1,7-2 …… Screw shaft 8-1,8-2 …… Motor celsin (for vertical movement of sensor) 9-1,9-2,9-3,9-4 …… Ohm reduction gear 10-1,10-2,10 -3,10-4 …… Screw shaft 11 …… H-shaped steel 12 …… He-Ne laser oscillator 13 …… Collimator 14 …… Lens 15 …… Two-dimensional image sensor

Claims (1)

[Claims] 1. A two-dimensional rangefinder in which a pair of two-dimensional rangefinders and a pair of one-dimensional rangefinders are arranged to face each other with the H-section steel sandwiched in the flange width direction, facing the flange and the web. , The vertical distance to each opposing flange is measured, and the vertical distance to each opposing web is measured by a one-dimensional distance meter to calculate the center deviation, the flange width and the web thickness at the same time. A method for measuring the dimension of an H-section steel, which comprises: