JPH0426406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a profile display device that displays in real time the dimensional deviation of a round steel bar running on a rolling line or the like.

[Prior art]

For example, Japanese Patent Application Laid-Open No. 129706/1984 is known as a device that processes the diameter signal of a projection type diameter measuring device that continuously rotates around a hot round bar and displays the cross-sectional profile of a rolled material by switching it for each cross-section. According to this, a display screen having dimensions as shown in FIG. 5 can be obtained. However, this display device has the following drawbacks.

[Problem to be solved by the invention]

(1) Only the most recent cross-sectional profile is always displayed;
Dimensional changes within a single material, which is essential for dimensional adjustment, cannot be grasped.

(2) The screen changes so quickly that it is difficult to view the screen at a leisurely pace. Also, it may be overlooked.

The present invention aims to eliminate the above-mentioned drawbacks, and aims to make it possible to grasp dimensional variations in the total length of a material within the field of view of an operator.

[Means to solve the problem]

The present invention provides a diameter measuring device that continuously outputs a diameter dimension deviation signal that is measured while drawing a spiral trajectory in the circumferential direction and longitudinal direction of a steel bar external shape, and a display device.
A display layout calculation device that calculates the standard Y coordinate of the diameter dimension deviation and output gain for each stage according to the input number of display stages, and outputs it to the display control device for each stage, and a sweep per stage. Input the time setting value, calculate the display switching timing according to the resolution of the X coordinate, input the dimensional deviation value signal for each timing, and calculate the Y coordinate of the dimensional deviation value from the reference Y coordinate and output gain. It consists of a display control device that calculates and outputs the updated time-series X coordinates to the display to display the diameter dimension deviation signal in real time.The display screen is divided into multiple stages, and the last display of the n stages is displayed on the n+1 stage. Continuing from the first display, the diameter dimension deviation values for the entire circumference and length of one steel material are displayed all at once on one screen of the display.

In this way, when the dimensional variation of the total length of the material is obtained, various rolling adjustments can be made in rolling the steel bar based on this information, and a steel bar with excellent dimensional accuracy can be rolled and manufactured. Generally speaking, rolling adjustment is
It is used to adjust the roll reduction and thrust of the rolling mill by understanding the vertical, horizontal, and shoulder dimensions and shape of the rolled material, and this type of adjustment can be easily performed based on dimensional fluctuation information of the total length of the material. .

Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the present invention, and FIG. 2 is a perspective view of essential parts showing an example of a diameter measuring device used in the present invention.

Referring to FIGS. 1 and 2, 1 is a projection type diameter measuring device, which measures the outer diameter of a steel bar to be measured. The projection type diameter measuring device 1 continuously rotates around the steel bar 5. As shown in FIG. 2, the shadow of the steel bar 5 caused by the parallel light rays emitted from the light projector 6 is imaged onto the light receiving element array 7 through the optical unit, and the number of elements in the shadowed area is calculated. Although not shown,
The light-receiving element array 7 is electrically scanned continuously, the light-receiving signal is binarized, and the number of shadowed elements during scanning is counted, Δd=α+β _K 〓 ^{i =1} Mi−d...(1) K: Number of counts, Mi: Number of elements in the shadow at the i-th counting α: Correction coefficient of the element β: Correction coefficient of the lens of the optical unit d: Diameter that is the reference diameter An image reading processing device that calculates the dimensional deviation Δd using equation (1) and outputs it is installed integrally.

This combination of the projector 6, the optical unit, and the light receiving element array 7 is driven by a motor and continuously rotates around the steel bar 5.

Reference numeral 8 denotes a slip ring for applying power to the light projector 6, applying a measurement voltage to the light receiving element unit 7, and obtaining measurement data (Δd) by the image reading processing device of the light receiving element unit 7.

2 is a display layout calculation device, 3 is a display control device, and 4 is a display device such as a CRT.

The diameter dimension deviation value Δd is sent to the display control device 3 through the slip ring 8 as a digital signal.

The present invention does not display the diameter dimension deviation signal obtained in this way as a circular graph, but
The deviation value is output on the Y coordinate, and is also swept in the X-axis direction to be displayed on the X coordinate in real time.

Since there is usually a restriction on the length of the X coordinate on the screen, a method is used to display it divided into two or more stages.

FIG. 3 is for explaining the calculation logic of the display layout calculation device 2, which receives the number of display stages as a set value and calculates the reference Y coordinate for displaying the output gain and diameter dimension deviation for each stage according to that value. This is a diagram. In this case, an example is shown in which an afterimage type CRT is used as the display and the number of display stages is two.

For afterimage type CRT, the X and Y coordinates are each 0 to 1000.
Sweep with mV analog signal. Since the display control device 3 continuously changes the X coordinate based on the setting of the sweep time, the display layout calculation device 2 only needs to calculate the Y coordinate for each stage.

In the example of FIG. 3, in addition to the dimensional deviation, [+, -] tolerance lines are simultaneously displayed using broken lines AU ₁ , AD ₁ , AU ₂ , AD ₂ . The display step number setting value is N, the [+] tolerance is U, the [-] tolerance is D, the maximum value of the diameter dimensional deviation Δd output from the projection diameter measuring device 1 at a maximum of 1 V is R, and the current display step number is h. Then, the reference Y-coordinate analog output Pn, the [+] tolerance line Y-coordinate analog output AUn, and the [-] tolerance line Y-coordinate analog output ADn are calculated by the following formulas.

Pn=(1000/2N)×(2N−2n+1)(mV)
……(2) AUn=Pn+(1000/2N)×U/R(mV)……(3) AUn=Pn−(1000/2N)×U/R(mV)……(4) Also, diameter dimension The gain G by which the deviation Δd is multiplied is calculated by the following formula.

G = (1000/2N) x 1/R (mV/mm) ...(5) The display control device 3 sends an X coordinate signal and a Y coordinate signal of 0 to 1000 mV to the display 4 as shown in Fig. 1. Output and display. The Y coordinate signal y of the diameter dimension deviation Δd is calculated by the following formula.

y=Δd・G+Pn (mV) When switching display stages, it is necessary to input a new value of the reference Y coordinate Pn from the display layout calculation device 2, so a 1-stage display complete signal is sent to the display layout calculation device 2 as a timing signal. Output.

On the other hand, the calculation of the X coordinate signal of the display control device 3 is as follows.
This is performed based on the input sweep time setting value.
The sweep time is the display time per stage, and by setting the counter preset value of the clock built into the display control device 3 according to the sweep time,
The switching timing is changed. However, the tolerance line is swept at the maximum speed that the display 4 can display. In this example, the [+, -] tolerance is 8 msec per stage. Furthermore, the display of dotted lines can be implemented using a blanking function provided in the display device 4.

Although an example in which an afterimage type CRT is used as the display device has been described here, the present invention can be applied to any display means such as a cathode ray tube or other surface display means. In the present invention, the display layout calculation device 2 and the display control device 3 are configured separately, but it is also within the scope of the present invention to combine them into one device.

On the screen of the display 4 illustrated in Fig. 1, diameter dimensional deviation values for a predetermined length of the steel bar (a length of several meters to several tens of meters taken in a normal rolling process) are displayed continuously over four stages. are displayed all at once. Normally, this is a single steel bar and will be displayed as a unique waveform.

From such a waveform, the overall shape of the steel bar can be determined. Normally, the dimensions and shape of the steel bar, that is, the profile, are confirmed on a screen displayed at once for each unit lot, or for each rolled steel bar in the case of rolling steel bars, and necessary information is obtained. Since the steel bars are rolled one after another, the corrugation of the preceding lot is canceled in a relatively short period of time, and the corrugation of the next lot is subsequently displayed. If you really want to spend a lot of time analyzing it, you can also store it in another device.

〔Effect of the invention〕

FIG. 4 is a diagram for explaining the meaning of each waveform in each case of the transition of the diameter dimension deviation value displayed according to the present invention.

In the case of bar rolling, the main control dimensions are the top and bottom dimensions, left and right dimensions, D shoulder dimension, and W shoulder dimension in relation to the rolling rolls, as shown in Figure A. It must be.

An example of the waveform displayed according to the present invention is the waveform shown in FIG. In this case, when comparing the dimensional designations of each part shown in A of the same figure, the gentle valley part of the waveform is recognized as the vertical dimensional deviation, and the steep part is recognized as the lateral dimensional deviation, as shown in the figure. The waveforms are recognized and the tops are respectively recognized as the D shoulder dimension deviation and the W dimension deviation, and these are repeatedly displayed at each pitch of rotation by the rotary diameter measuring device 1.

This waveform makes it possible to obtain various information for rolling adjustment, and can be used, for example, as follows.

(1) As a result of observation over the entire specified length,
If large waves are recognized in the deviation value wave height,
Possible skid marks or uneven heat.

(2) As shown in FIG. 4C, by observing the change in left and right dimensions (t ₁ →t ₂ ) near the rear end of the billet, it is possible to determine whether there is tension between the stands. In this example, the central part of the round bar 5 is larger than the rear end, and compression appears to have occurred.

(3) As shown in FIG. 4D, by observing the left-right symmetry of the D shoulder shape and the W shoulder shape with the left and right dimensions as an axis, it is possible to determine the sliding deviation of the finishing roll.

As described above, the present invention allows the profile of a steel bar to be grasped as a whole, making it possible to obtain a lot of information that could not be obtained using conventional techniques.
Taking the rolling of steel bars as an example, the necessary rolling adjustments can be made immediately, which is extremely effective in improving the quality of the product.

Although the present invention has been particularly described in terms of its usefulness in rolling steel bars (including similar wire rods, etc.), it can also be applied to other articles that require diameter dimension control.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 is a block diagram showing the configuration of the present invention.
The figure is a perspective view showing the configuration of the main parts of the diameter measuring device 1 shown in Fig. 1, Fig. 3 is a plan view showing the display screen for explaining the functions required when determining the display layout, and Fig. A graph and an explanatory diagram showing an example of profile data obtained by the present invention, and FIG. 5 is a plan view showing an example of display of a conventional profile display device. 1: Diameter measuring device, 2: Display layout calculation device, 3: Display control device, 4: Display device, 5: Steel bar,
6: Projector, 7...Element array, 8: Slip ring.

Claims (1)

[Claims] 1. A diameter measuring device that continuously outputs a diameter deviation signal that is measured while drawing a spiral trajectory in the circumferential and longitudinal directions of the outer shape of the steel bar, a display, and a diameter measurement device that measures the diameter deviation signal for each step according to the input number of display steps. A display layout calculation device that calculates the reference Y coordinate and output gain for each stage and outputs them to the display control device for each stage, and a display layout calculation device that inputs the sweep time setting value for each stage and displays according to the resolution of the X coordinate. Calculate the switching timing, input the dimensional deviation value signal for each timing, calculate the Y coordinate of the dimensional deviation value from the reference Y coordinate and output gain, and output it to the display together with the updated time series X coordinate. It consists of a display control device that displays the diameter dimension deviation signal in real time.The display screen is divided into multiple stages, and the last display of the nth stage is displayed as n+1.
Continuing to the first display of the step, the entire circumference of one steel material,
A steel bar profile display device characterized in that the diameter dimension deviation value of the entire length is displayed all at once on one screen of a display device.