JPS63286233A - Automatic shape adjusting device for dissimilar bar steel - Google Patents

Abstract

PURPOSE:To reduse a dimensional shape defective material and rolling stoppage time by using the automatic shape adjusting device consisting of the measuring instrument capable of measuring the dimensional shape of a dissimilar bar steel in short time and the rolling adjusting device automatically adjusting the dimensional shape immediately from the information thereof. CONSTITUTION:The projection on the outer peripheral face of the dissimilar bar steel 1 for thread reinforcement is spirally formed by the rolls 6, 7 of a rolling mill 5. The shape of a knot is detected by camera devices 2, 3 by projecting with a stroboscopic device 4. The rolling speed of the dissimilar bar steel 1 is found by correcting the number of roll rotations of the rolling mill 5 by a speed arithmetic unit 8 and the passing cycle of the knot is found from the reference knot pitch of the dissimilar bar steel 1 inputted from a setting calculating device 13 and this rolling speed. The knot shape passing through at fixed cycle is caught every moment as a still picture image by sensing by emitting simultaneously the strobo device 4 and camera devices 2, 3 respectively at this cycle. The information of the dimensional shape is fed to CRT 10 and host controller 11 from a shape identifying device 9, a rolling adjustment device 12 is actuated and the dimensional shape control of the dissimilar bar steel 1 is automatically performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an automatic control device for controlling the size and shape of a deformed steel bar to be hot rolled.

(Prior Art) The rolling operability of a deformed steel bar having protruding edges or ribs on its outer circumferential surface is more difficult than rolling a normal round bar. In particular, for deformed steel bars for threaded reinforcing bars, since the joint coupler is used to screw and fix the connection of both threaded reinforcing bars, the shape of the outer periphery of male threads at equal intervals is required to match the spiral female thread on the inside of the coupler. If care is not taken to prevent distortion, etc., a large amount of rejected products will be produced.

For this reason, when rolling this type of deformed steel bar, dimensional and shape control is extremely important, and it is necessary to be especially careful when rolling candy. Therefore, conventionally, the size and shape adjustment during candy rolling was performed by rolling once and manually measuring the size and shape of an intermediate inspection sample off-line, feeding it back to the next rolling, and repeating this until it falls within the standard. After adjusting the reduction amount of the rolling mill, the amount of thrust, the amount of deviation between the upper and lower rolls, etc., the company moved to full-scale rolling.

In addition, as a prior art of size and shape control related to the present invention,
For example, JP-A-56-24507, JP-A-58-
There are disclosures such as Japanese Patent Publication No. 218314 and Japanese Patent Publication No. 62-8245, which relate to automatic dimensional control for ordinary round steel having a uniform cross-sectional shape in the longitudinal direction.

(Problems to be Solved by the Invention) As described above, the size and shape adjustment during rolling of deformed steel bars is performed offline and manually controlled.
During this period, rolling was forced to be interrupted, and therefore the rolling
``There was an unavoidable problem of a decrease in Hr.

Therefore, there was a desire to develop a device that could detect dimensions and shapes in a short time by contact immediately after rolling, that is, to automatically measure dimensions and shapes online and automatically feed it back to immediate rolling. .

In addition, three patent publications have been described above as prior art related to the present invention, but all of these are aimed at round steel having a uniform longitudinal cross-sectional shape of the bar material that wants to have protrusions on the outer peripheral surface.
This automatically controls the horizontal dimension (cross section taken perpendicular to the longitudinal direction) and profile of the bar. Therefore, when it is necessary to detect the edge shape, which is a protrusion on the outer circumferential surface of a deformed steel bar, in the longitudinal direction and automatically adjust and control the rolling mill based on edge deviation, etc., as is the object of the present invention, the above-mentioned method is applicable. It cannot be applied with prior art.

(Means and effects for solving the problem) The present invention has been made in view of the above-mentioned problems, and its gist is that the dimensions and shape of a deformed steel bar immediately after hot rolling can be determined online in a short time. An apparatus for automatically adjusting the shape of a different square steel bar is provided, which includes a measuring device that can perform measurements and a rolling adjustment device that automatically adjusts the immediate dimensions and shape based on the information.

That is, in a rolling adjustment device that automatically adjusts the edge dimensions and shape of the outer circumferential surface protrusions of a deformed steel bar to be hot rolled, (a) a strobe light emitting device and a camera device installed on the exit side of the rolling mill and their image processing are performed; (b) A rolling adjustment device that adjusts the rolling mill based on the dimension and shape; (b) A rolling adjustment device that adjusts the rolling mill based on the size and shape; It is characterized by emitting light and exposing the camera to light at the same time to capture the shape of the hot-rolled deformed steel bar as a still image, measuring the dimensions and shape, and adjusting the rolling mill so that the dimensions and shape are reflected in the immediate rolling. This is an automatic shape adjustment device for deformed steel bars.

Hereinafter, the mechanism and functions of the device of the present invention will be explained in detail with reference to the embodiment shown in the drawings.

(Example) Figure 1 is a plan view showing an overall configuration in which the apparatus of the present invention is incorporated into a vertical rolling mill that forms protrusions on the outer peripheral surface of deformed steel bars, and shows one example. be.

The material to be detected is a deformed steel bar 1 for threaded reinforcing bars, and the DS side (drive side, upper side in the drawing) of the protrusion on the outer peripheral surface1. Fushi 1'
are the D and S side rolls 6 of the rolling mill 5, and the WS side (work side, lower side in the drawing) edge 1'' is the WS side roll 7 of the rolling mill 5. It is formed into a thread.

In such an extension forming operation, the base 1 camera device 2 of the camera device constituting the device of the present invention is a deformed bar, a DS of steel 1.
The camera device 3 is configured to view the WS side edge 1'' shape from above immediately after rolling.
The strobe light emitting device 4 is arranged so that it can illuminate the detection portions of the swallow 1 camera device 2 and the A2 camera device 3 from above.

Then, the speed calculation device 8 corrects the roll rotation speed of the rolling mill 5 to determine the rolling speed of the deformed steel bar 1, and from this rolling speed and the standard edge pitch of the deformed steel bar l inputted from the setting calculation device 13, Find the passing period of the bar 1.

At this passing period, the strobe light emitting device 4. - The A1 camera device 2 and the A2 camera device 3 are caused to emit and be exposed to light at the same time.

This point will be explained in detail based on an operation example using FIG. 2.

The diagram shows the movement of the edge of the deformed steel bar 1 (threaded reinforcing bar), the strobe light emitting device 4, the camera device 2, the grave 2, the camera device 3
The operation time chart shows D2 as deformed steel bar 1.
2 (JIS name) is taken as an example. As can be seen from Fig. 2, A1 camera device 2, A2 camera device 3
The exposure time of the camera (hereinafter collectively referred to as the camera) is I
In the case of X 10-38 and D22, the pitch is 1
When the rolling speed is 2.0 wm and the rolling speed is 8.671, the moving time for one pitch is 1.38 x 1o-3s, as follows: 1 pitch moving time=pitch/rolling speed.

Therefore, the camera should be set at the frame's passing period, that is, 1.38×10
Even if the frame is exposed every -38 meters, the edge will move 8.67 meters while the camera is exposed to light, so it will not be possible to capture the edge as a still image.

Accordingly, this problem has been solved in the present invention by simultaneously performing exposure of the camera and light emission of the strobe during the frame passage period.

The strobe flash duration is 20μB, and the amount of movement of the frame while the strobe is flashing is 0.17m for the D22.
11, therefore, by the method described above, it is possible to capture the frame shape passing at a constant period as a still image moment by moment.

The A1 camera device 2 captures the shape of the DS side of the deformed steel bar 1 as A1.
Since the two camera devices 3 see the shapes on the WS side, the shapes on the DS side and the WS side can be identified separately by the shape identification device 9. It is possible to measure dimensions such as edge deviation G, pitch P, edge height a, etc. of 1.

The size and shape information from the shape identification device 9 is sent to the CRTlo and the higher-level controller 11, and the rolling adjustment device 12 is activated by a signal from the higher-level controller 11 to automatically control the size and shape of the deformed steel bar 1.

As a result, if the edge deviation of the deformed steel bar 1 is not within the standard as shown in FIG. By adjusting the deviation between the roll 7 and the lower roll 6, it is possible to bring the edge deviation within the standard as shown in FIG. 3(b).

Similarly, the height of the lid can be automatically controlled.

(Effect of the invention) Conventionally, in the rolling of deformed steel bars, one billet is rolled from the start of rolling until the dimensions and shape are within the standard, the rolling is stopped, the dimensions of the sample are manually measured, and the dimensions are measured manually. Based on this, the rolling mill's reduction amount, thrust amount, and amount of deviation between the upper and lower rolls were adjusted, and the process was repeated several times. Therefore, when making candy, a large number of products are produced whose dimensions and shapes do not meet the standards, and offline measurement of sample dimensions requires many hands and a considerable amount of time. Since rolling could not be done between the two, the work rate was greatly reduced.

As described above, the present invention measures the dimensions and shapes of deformed steel bars immediately after rolling online in a short time, and automatically adjusts the instant rolling mill based on the measurements, thereby reducing the number of materials with defective dimensions and shapes, and reducing rolling. This shows the remarkable effect of advantageously overcoming the two problems of reducing downtime.

[Brief explanation of the drawing]

FIG. 1(a) is a conceptual diagram showing the overall configuration of an apparatus according to an embodiment of the present invention, FIG. 1(b) is a front view of the deformed steel bar in FIG. 1(a), and FIG. An example of a time chart of the operation of a strobe light emitting device, FIG.
) is a view of the deformed steel bar seen from above, and FIG. 3(b) is a cross-sectional view of the deformed steel bar, which explains the positional relationship between the deformed steel bar, a camera device, and a strobe light emitting device. 1... Deformed steel bar, 1'... DS side holder, 1"
...WS side, 2...house 1 camera device. 3... Ya 2 camera device, 4... Strobe light emitting device,
5...Rolling mill, 6...D S side o-
n, (lower 0-ru), 7...WS side roll (upper roll)
, 8... Speed calculation device, 9... Shape identification position, 10
...CRT, 11... Upper controller, 12... Rolling adjustment device, 13... Setting calculation device.

Claims (1)

[Scope of Claims] The rolling speed of the deformed steel bar is determined by correcting the roll rotation speed of the rolling mill, and further, the rolling speed of the deformed steel bar is determined from the rolling speed and the reference dimension of the outer peripheral surface protrusion of the deformed steel bar inputted from the setting calculation device. A speed calculation device for calculating the passing period of the outer circumferential surface protrusion of the steel bar, and a strobe light emitting device and a camera device that are simultaneously linked with a constant period signal from the speed calculation device, and the deformed steel bar is captured at a constant period by the camera device. a dimension and shape measuring device that processes the shape of the outer circumferential surface protrusion as a still image, and a shape recognition device that measures the dimensions and shape; 1. An automatic shape adjustment device for deformed steel bars, comprising a host controller that sends operation signals and a rolling adjustment device that adjusts a rolling mill in response to dimensional and shape signals from the host controller.