JPS5863803A - Measuring method for bending rate of bar-like material - Google Patents

Abstract

PURPOSE:To measure the bending rates of bar-like materials automatically and quantitatively and to lessen manpower by disposing at least 3 pairs of light projectors and photodetectors above and below a transfer passage for the bar- like materials in the longitudinal direction of the bar-like materials and detecting the light shielded positions at the same time. CONSTITUTION:H-shaped steel 10 having prescribed lengths are moved via a roller leveler 12 to an inspecting floor 14, where the steels are transferred in the direction (arrow D) at a right angle to the longitudinal direction. The positions at one end E at the same time of the H-shaped steel 10 passing through the positions of at least >=3 pairs (11 pairs) of detectors 20 consisting of light projectors 22 such as bar-like light sources, condenser lenses 24a, and linear arrays 24b disposed dividedly above and below the floor 14 are detected. The position signals thereof are arithmetically processed, whereby the bending of the H- shaped steel 10 is measured automatically and quantitatively and manpower is lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the amount of bending of a bar material, particularly for measuring the amount of bending in the longitudinal direction of a shaped steel such as an H-shaped steel or a bar steel such as a round bar. The present invention relates to a suitable method for measuring the amount of white spots on a rod-shaped material.

Conventionally, bending in the longitudinal direction of steel sections such as H-beams and bars such as round bars has been measured visually by workers, or by workers using scales or strings. It was being done. In this case, the latter method requires at least three inspectors to measure the amount of bending of one section steel, and the inspection line must be stopped each time, making it difficult to conduct a complete inspection. It has the disadvantage of being For this reason, in the past, inspections were usually performed visually by inspectors, which had the problem of being insufficient in terms of quality control.

The present invention has been made to solve the above-mentioned conventional drawbacks, and is capable of automatically and quantitatively measuring the amount of bending in the longitudinal direction of shaped steel such as H-shaped steel and bar steel such as round bar. Therefore, it can save labor and improve safety in inspection work, and
The purpose is to enable sufficient quality control.

In the present invention, at least three pairs of detectors, each consisting of a light emitter and a light receiver, which are separated on both upper and lower sides of the transfer path, are installed on the transfer path for transferring the rod-shaped material, along the base line in the longitudinal direction of the rod-shaped material. The extension value It is set perpendicularly to the reference line, and when the bar passes the position of the detector, the j brightening position of each detector due to the bar at the same time is detected, and each light shielding position and The amount of bending of the bar is calculated from the spacing between each detector.
The above objective has been achieved.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Generally, an H-beam 10 that has been sawn to a predetermined size with a saw cutter or the like is straightened through a roller straightener 12, as shown in FIG. It is being transferred on the floor 14 in a direction perpendicular to the length direction (in the direction indicated by the arrow in FIG. 1).

In this embodiment, as shown in FIG. 2, the inspection floor 14 is provided with two sections, one below and one above the inspection floor 14.
It consists of a light projector 22 such as a rod-shaped light source, and a light receiver 24 having, for example, a condensing lens 24a and a linear array 24b.
At least 3 pairs (11 pairs in Figure 2111) of detectors 20
, H-shaped steel 1 so that it is perpendicular to the length direction of H-shaped steel
The H-shaped steel 10 passing between the emitter 22 and the receiver 24 can be detected by disposing them at a predetermined interval on a straight line perpendicular to the direction of transport of the light beam (arrow D). ing.

Therefore, when the H-shaped steel 10 passes the position of the detector 20, at the same time, the H-shaped 9M10 detects the position of one end E where the beam 26 from the projector 22 is traced from the side to EQ-6. Then, the light shielding position of one end of the H-shaped steel 10 detected by each detector 20 is compared, and the bending evidence of the 11-shaped copper 10 is determined from each light position and the arrangement interval of each detector. .

Specifically, as shown in FIG. established 3
Considering the case where a pair of detectors 20-1.20-2.20-3 is provided, when the H-beam 10 that can be transferred perpendicularly to the length direction passes the detector position, the projector 22 The luminous flux 26 emitted from the
As shown in the figure (N1) and (Q), the output of the portion !l1 defeated by the H-shaped steel 10 becomes zero. At this time, the output of each linear array is detected at the same time, Find the digit 1cl a s b s c of the starting point of zero output at that time.As a result, each digit 11 a % b s on the linear array
From the lengths a', b', and a' up to c, the distance that the H-section steel 10 has passed from the reference line XX on the detector to the measurement time (
A, B, and 0 (hereinafter referred to as light shielding positions) are determined. here,
Since the detectors are installed at predetermined equal intervals, the bending amount d of the H-section steel 10 at intervals of 2L can be expressed as in the following equation.

At this time, the lengths of the H-beams 10 located at intervals of 2L are as shown by the following equation.

Therefore, the length of H-beam 10! Since the amount of music d is θ+0 here, it becomes CO52θ÷1, and as described above, the amount of music d can be found very easily using equation (5), so it can be obtained from the output of the detector 20. Displays or records the results of a pass/fail judgment based on blank lines and preset inspection standards, or displays or records the results of calculations such as blank lines. That's easy.

The spacing between the detectors 20 and the selection of the three pairs of detectors can be determined based on the length of the H-shaped steel to be measured and the direction of the curve b. It is also possible to use the outputs of any three pairs of detectors that are not present.

Furthermore, the spacing between the detectors is not limited to equal intervals;
5) By modifying the formula, it is possible to obtain an arbitrary arrangement interval. In the above example, white spots were measured only in one direction of the I (shape steel), but when the H shape steel is By performing a similar 611 determination by rotating the lens by 90°, two bends oriented at right angles can be measured.

In addition, by selecting any three pairs of detectors, it is possible to measure the bending at any part in the length direction. By using this, it is also possible to measure the bending over the entire length of the H-section steel.

In the above embodiments, the present invention was applied to measuring the amount of bending of H-shaped steel, but the scope of application of the present invention is not limited to this, and can be applied to other shaped steel or general bar-shaped steel such as bar steel. It is clear that the amount of bend in the material can also be measured in the same way.

As explained above, according to the present invention, it is possible to automatically and quantitatively measure the bending of a bar without stopping the inspection line, and by omitting human intervention on the inspection line, This will save labor and improve safety in inspection work, and improve measurement accuracy, making it possible to perform sufficient quality control. In addition, since three light shielding positions are detected at the same time on the bar being transported, the amount of bending of the bar can be determined regardless of the state of transport of the bar, i.e., whether it is being transported or stopped. It has excellent effects such as being able to be measured.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an inspection process for H-beam steel and an inspection floor on which a detector according to the present invention is installed, to which the method for measuring the curved lid of a bar according to the present invention is applied, and FIG. 1 is a sectional view taken along the line ■-■ in FIG. 1, showing the relationship between the H-shaped steel and the detector according to the present invention. FIG. 3 is a state in which the light-blocking position of the H-shaped steel is detected according to the present invention. FIG. 2 is a plan view showing an example of the output state of each detector, and a diagram showing an example of an output state of each detector. 10...I (shaped steel, 14...inspection floor, 20.20-
1.20-2.20-3...Detector, 22...Emitter, 24...Receiver representative Ron Takaya (and 1 other person)

Claims (1)

[Claims] (1) At least three pairs of detectors consisting of a light emitter and a light receiver, which are separated on both the upper and lower sides of the transfer path, are placed on the transfer path for transferring the bar material, so that they are perpendicular to the reference line in the longitudinal direction of the rod material. Extending from the reference line, when the rod-shaped material passes the position of the detector, detecting the light-blocking position of each detector by the rod-shaped system at the same time, and arranging each light-blocking position and each detector. A method for measuring the amount of bending of a bar-shaped material, characterized in that the amount of bending p of the bar-shaped material is determined from the interval.