JPS58180905A - Method and apparatus for measuring bend of shape steel - Google Patents

Abstract

PURPOSE:To make it possible to perform measurement in a line, by placing a shape steel to be measured on supporting points having a specified interval, pushing up the shape steel so as to offset the deflection due to its own weight, measuring the deflected amount of the shape steel under this state, thereby obtaining the bend amount. CONSTITUTION:A measuring apparatus comprises a supporting point device 1, a deflection amount detector 2, an operation control device 3, and a pushing up device 4. The supporting point device 1 comprises a pair of supporting points 10 and 10, which can be freely moved up and down and also moved in the longitudinal direction of a shape steel to be measured A and a device, which measures the weight of the shape steel to be measured A that is mounted on said supporting points 10. The horizontal and vertical movement of the supporting points 10 and 10 are controlled by the operation control device 3. The distance l2 between the supporting points 10 and 10 and the measured weight are inputted to the operation control device 3. The deflection amount detector 2 can be moved between the supporting points 10 and 10. The deflected amount is detected by detecting how much the lower surface of the shape steel A is displaced with respect to the height level of the supporting points 10 and 10. The shape steel A is pushed up by the pushing up device 4. A resistance force P to be loaded at this time is computed and outputted by the operation control device 3.

Description

[Detailed description of the invention] TECHNICAL FIELD This invention relates to a section steel OAB field setting and apparatus.

Shaped copper products are usually cooled by hot pressure am, but during these processes, bending occurs due to the difference in heat capacity of each part of the product cross section and due to unrestrained cooling.

Normally, the straightening is carried out using this -bFi attack roller straightening machine or a press straightening machine.

However, since a shaped steel product placed on a flat surface bends due to its own weight, it is difficult to quantitatively determine the amount of bending O using ordinary measurement methods.

Conventionally, the amount of bending was kept constant using the following measurement method.

First, if the shaped steel product is an H-shaped steel or channel steel product with a cross-sectional shape that can be rotated 90 degrees, the product can be rotated 90 degrees using a crane, etc.
It is turned, and the bend in the vertical direction is 111 KL in the horizontal direction, thereby eliminating the deflection caused by the self 1 and making it constant in the water system.

In addition, if the product has a cross-sectional shape that makes it difficult to rotate 90 degrees, such as steel sheet piles, it is necessary to ,
The product is placed so that the outer extension length of each fulcrum is expressed equally, and the amount of O deflection is measured. Next K [I! 1) Rotate the product by 180 degrees using a crane, place it on the fulcrum, and measure the amount of deflection at this time. The amount of bending is calculated from the two amounts of deflection obtained in this way.

However, all of the conventional measurement methods described above require the use of cranes and other equipment, making it impossible to perform quick online measurements. In addition, there is a drawback that it is difficult to inspect all products and guarantee quality, which necessitates off-line wave number inspection.

In order to overcome these drawbacks, the applicant of the present application has already proposed a new method and device for measuring bending in %Ko Sho No. 56-4398g.

This proposed method and device places a shaped steel to be measured on fulcrums having a predetermined interval, measures the amount of deflection of the shaped steel to be measured, and measures ]I! The amount of deflection is measured with a predetermined load applied to the fixed shaped steel, and the true bending amount of the fixed shaped steel is calculated from the three deflection amounts measured respectively.

The present invention is based on the above-mentioned nine proposed methods and apparatus. Issued on m-
The shape steel pipe is placed between fulcrums and is pushed up from below to offset the deflection due to its own weight, and the amount of deflection is measured in this state to determine the bending of the shape steel.

In the present invention, first, as shown in Fig. ag1, the shaped steel to be measured (A) is placed on the fulcrum (B) CB). Measure Fi in advance. Also, the overhang length 4) (zt) protruding from the fulcrum (B) CB) shall be the same length, and this length t,) is determined in advance.

The amount of deflection (Jl) of the shaped steel (A) determined at this time is the amount of bending (J) of the shaped steel (A) and l! Wealth-induced nine-way amount (Jco)
), and J, z J +a@6 holds true. If we rewrite this, it becomes J“Jl-ago.

In the method of the present invention, as shown in FIG. 1(b), a predetermined drag (
P), the amount of deflection due to its own weight (Jco) is offset to 0, and the deflection at this time t(Jυ
Let be the shape steel orb amount (, a).

Here, the amount of deflection due to own weight (Jco) is theoretically expressed by the following formula.

Here, E: Young's modulus (force l: moment of cross-sectional snow (36) W: p weight per unit length (#/1I) On the other hand, the amount of push-up due to drag (P) is theoretically calculated using the following formula. (by) indicated.

Therefore, in order to offset the amount of deflection due to own weight (δaO) with the amount of push up (jp), δ, -Jc6...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・－・・・・・・・・・・・・・・・
・There is a must to be tatami.

Here, by substituting the formula 0.0 into formula
If the deflection amount (Jρ) is measured in this state, the amount of deflection (Jρ) will be the amount (J) of the section steel (mu).

Mori and shaped steel in a certain way developed by Kuramoto
Because there are no cobblestones to turn the
It becomes possible to determine t.

Next, a concrete example for carrying out the method of the present invention will be explained based on Fig. Z.

This O device consists of a fulcrum device 0), a deflection amount detection 5(2)), an arithmetic and control device (3), and a pushing up device (4).

The fulcrum device (1) is equipped with a pair of O-support A wheels that can be raised and lowered and is freely movable in the longitudinal direction of the shaped steel to be measured (A), and is placed on the fulcrum oQ (rotation) of ζO, so that the weight of the shaped steel O to be measured can be measured in m. *Swi weight 1Iy
from the il device (not shown).

The movement and elevation of the fulcrum (to) (2) is controlled by the arithmetic control device ($)
K and p controlled, fulcrum (2) (2) OI [release C41]
is input to the arithmetic and control unit (3). In addition, the weight (W)% calculated by the weight measuring device is fixed at 9% by the weight measuring device (3%).
)K is input.

The deflection amount detection 5 (2) is a trap so that the fulcrum can be moved, and how much the lower iI of the section steel is relative to the height level of the fulcrum (2) (2). By detecting displacement, the amount of deflection is detected. This detected value is also input to the arithmetic and control unit (3).

The push-up device (4), like the deflection amount detector (7), is movable between fulcrums (to) and a push rod (to) that pushes up the section steel (mu) with a predetermined resistance (P). 40) and the p-dossel (41) that detects the load. push rod (4
0) pushes up the section steel (mu) using an appropriate drive device.

At this time, the load force 1i drag force CP) is calculated by the arithmetic and control unit (3)
K yo C above ■ type Kl! is calculated and output. Also I
The load of IIIK load 1+ is the load cell (41) K
Then fIIK#1 is input to the arithmetic and control unit (3).

The device having the structure O described above can be installed at any position within the production 70- as long as it is downstream of the device O having the fog length sacrificial ability of the shaped steel to be measured. Below is an example of a case where a shaped steel product is installed on a transfer table that is transferred in the 1-way direction. be a man

The length -8 (t) is the one length vessel (5) located upstream.
)K〉The $11 shaped steel whose length was measured stops at the position of this measuring device. This stoppage should be done by the stoppers) Arashi.

The length C1) from the lengthener (5) is sent to the arithmetic and control unit (3), where the fulcrum spacing (4) is calculated from the predetermined 9 overhang length -5CL@>. The arithmetic and control device (3) moves the fulcrum CLQ (g) so that the distance between the fulcrums and the fulcrums (L, ) is equal to this calculation 1, and then moves the fulcrum a
4 (2) to support the shaped steel, and then move the detector Q) and push rod (40) to approximately the center of the shaped steel (A). Note that it is preferable to keep the overhang length 4) as small as possible without interfering with the measurement work, since this will reduce measurement errors.

When the shaped steel (Mu) is held at the fulcrum (7) αOK*, the weight (W
) is measured and input to the arithmetic and control unit (3). Here, in the arithmetic and control unit (3), p m -($4 knee snow 44. snow) St.

O calculation is performed and this drag force CP) is output to the pushing up device (4). The push-up device 幹) pushes the push rod (40) against the section steel (mu) using the drag force CP commanded by the arithmetic and control device (3). This CIIIK loaded drag force CP) is detected by the load cell (41)K and read by the device (3)K.

As a result, the deflection (Jeo) of the shaped steel (A) due to its own weight becomes O, so in this state, the deflection amount test m * (2) is p
If the amount of deflection (J, ) is detected, ζ□ J.

is m1 songs〉quantity (J). The amount (J) is displayed externally by appropriate means.

The above operation is shown in the flowchart of FIG.

In addition, as the deflection amount detector -), use a contact type O-sensor and Madane scale static to contact the deflection sensor from the bottom side of the section steel (mu), and detect the vertical position of -k)/amount at that time. In this example, as shown in FIG. 4, an umbrella system 9 is used and connected to the arithmetic and control unit (3). In $1411, @ is a photodetection device, the ring is a lifting device that lifts and lowers the O photodetection device (2), fi4Fi
Optical detection prosthesis device that detects the vertical position;
(X) is the level of fulcrum (2) (rolling), (a) and CI)
This is the lowest end of the deflection part of the Fi shaped steel to be measured.

Light detection device 0! As shown in the figure, the main unit consists of a 1m1c-shaped head (c), a light emitter, and a light receiver (a). The light emitter and the light receiver are provided facing the tip g1 of the head9, and in this embodiment, three sets of these combinations are provided.

The light is projected from the light emitter) and is received by the light receiver,
This 1i11 beam (m,) (mm) forms a constant level, but the beam (ms) (mm) is
Low light emitting and high light receiving so that they are positioned on the horizon (2)
Align the horizontal position of the beam (m=) (When mJ is interrupted, the light receiver 1It14 outputs object detection mos4#, and this signal is configured to be sent to the λ force field to the arithmetic and control unit). .

In this embodiment, a light-receiving slit is provided on the front surface of the light-receiving device to improve detection accuracy. There is. A touch switch is installed on the top of each emitter and receiver (2).
I! If this happens, it will be detected immediately.

This touch switch is a rising eye scissors @KIll! KIll may be configured so that the system continues and makes an emergency stop in the event of a collision.

The light detection scissors holder having the above structure is supported by a lifting device 4, and is thereby capable of being raised and lowered. Lifting device
There are 6 parts including a frame, a roller, and a side-to-side O linear head (31). The linear head (31) is a motor that converts rotational motion into linear motion, and has the same function as a rack and pinion.
It's huru. The photodetector (2) is this linear head ($1)
It is placed on the OKll Rad S2).

The motor is capable of forward and reverse rotation, and is configured to rotate forward or backward in response to an ascending or descending command from the arithmetic and control unit e).

'1kks (81) (is) is a stand switch installed at the upper and lower positions of the frame @O] and the rod (1kks). The mitsuto switch (U) may be connected to K11IiE so that it is turned ON to emergency stop the controller (2) in the event of mourning.

In this embodiment, the position detection device connects the head (34) to the lower end of the head via a connecting rod (34) using an expanded linear IIO Magnescale. Gune scale is the section steel (mu) O fulcrum level (X)
The vertical position signal (8) is adjusted so that when the K beam (t) (as) is located,
The eyes are set so that they become larger as the head descends.This is because the OY scale 40 output is input to the arithmetic and control unit (2).

The arithmetic and control unit (3) inputs the position signal (11) from the position detection device which changes from time to time, and also inputs the position signal (11) from the light receiver @
Input the detection signal of the lowest point of deflection IICII+) (β) from -, read the position signal at the time of detection ('') CI), and output the deflection amount (J,), that is, the amount IIIj (J). , ζo II, both edges of the section steel (
-) 4ik (Jig) at the lower end of 0 (J, β)
Even if you calculate the average value - 1 as shown in the formula below, it is still a long time.

The reason for this is that the shape and dimensions of the shaped steel OWR are generally not completely symmetrical, and there is a slight left-right imbalance, and that the position of the shaped steel is shifted from the center in the width direction due to the addition of drag (CP). , Due to this influence, the lower end positions of both edges may not be the same on the left and right sides.

Next, the operation of the deflection amount detector (2) will be explained.

First, a normal rotation drive command is output from the arithmetic and control unit (1) to the motor, and then the motor starts to rotate in the normal direction and the light detection bale holder starts to rise. Now, if the lowest end 11 (-) is at the lower position than (-), when the (straight) comes to the beam (m,) position,
In order to block the light, a <g) detection signal is output from the light receiver to the arithmetic and control unit (2). In device (3), at this time, the position detection device -0 signal (ml) t deflection amount (a
□) is stored in its internal memory as 4VK. Subsequently, (I) is detected by the other photoreceiver, and the arithmetic control II scissor device 3) stores the deflection amount (Jψ) in its internal memory. Calculate the average value from □) and (su) to obtain the weight (Ji) and output it.Then, the arithmetic and control unit outputs stop and reverse commands to the motor. Then, at the 9th point in time when the photodetector (c) returns to the original O position, it is stopped and the adjustment is completed.

According to the o-h deflection amount detection 11 configured as described above, it becomes difficult to perform measurements with extremely high accuracy.

As explained above, according to the present invention-0III method and device, it is possible to measure the amount of orb without rolling the section steel, so it is possible to read the table continuously and constantly in the line, It has O effects such as being able to inspect all products.

[Brief explanation of the drawing]

Figure 1 is a diagram 11114 of the method of the present invention, Figure 3 is a positive diagram showing an embodiment of the apparatus of the present invention, Figure 18 is a flowchart showing its operation, and Figure 4 is a diagram showing one example of the deflection amount detector. It is a front view showing an example. In the figure, (1) is the fulcrum device, (2) is the weight detector, (
3) is the calculation side m device, (4) is the push-up device, (2) is the fulcrum, (40) is the push rod, (41) is the tj load cell, (
C) is a photodetection device, (2) is a lifting device, - is a position detection device, Q4#i head, - is a projector, a ring is a light receiver, an octopus is a light receiving spot, - is a v near head, ( !12) is a rod, (U) is a beam switch, - is a magnetic head, (
U) indicates each connecting rod. 41 applicants: Nippon Kokan Co., Ltd.

Claims (1)

[Claims] 1. Place the shaped steel to be measured on fulcrums O having a predetermined interval, push up the shaped steel to offset the deflection due to its own weight, and in this state, press the shaped steel to be measured. A method for measuring the bending of shaped copper, characterized in that the bending of the shaped steel to be measured is obtained by keeping the amount of deflection constant. A pair of fulcrums on which the shaped steel to be measured is placed, which is movable in the longitudinal direction of the shaped steel and can be raised and lowered in the vertical direction;
A copper shape deformation device having a stone pushing device for pushing up the shape steel to be measured with arbitrary force between supporting points, and a deflection amount measuring device that constants the amount of deflection of the shape copper to be measured. .