JP5023571B2 - Automatic tipping machine for continuous cold rolling mill - Google Patents

Description

  The present invention relates to the tip of a continuous cold rolling mill aimed at shortening the time for passing the tip in the rolling process in the steel field, improving the quality of the tip material, reducing the work of the operator, and shortening the time for passing the tail end. The present invention relates to an automatic sheet passing device.

  Conventionally, in the tip threading device in cold rolling equipment in the steel field, the tension setting value is received from the host computer, the operator manually adjusts the gap of the work roll, and after each rolling mill bite (metal in) The manual threading operation was adopted, in which the tension was adjusted while looking at the tension setting value, and the thread was passed to the take-up reel. Therefore, it took a lot of time to pass the plate, and off-gauge was generated in the plate. This off-gauge portion is not a product material but is cut in the next process (see, for example, Patent Document 1).

JP 2004-34116 A

In the conventional sheet-passing equipment in cold rolling equipment in the steel field, a fixed amount is opened so that the work roll gap of each rolling mill stand can be bitten before starting rolling, and the entry side payout reel Through the material to be rolled. The rolling mill in which the plate tip is engaged starts constant load-side tension control and constant load-side tension control using the roll speed of the previous-stage rolling mill so that the rolling load at a low pressure reduction rate is low. . In the sheet feed state, the plate thickness is controlled by the work roll gap and the tension is controlled by the roll speed of the preceding rolling mill, but after the rolling speed is increased, the sheet thickness control is the roll speed by the preceding rolling mill and the tension control is the work roll gap. It is realized by.
Since the end of the plate reached the next rolling mill and the exit side tension was established, the reduction of the rolling mill was closed and brought to the set load, so there was no meandering of the end of the plate caused by sudden reduction. On the other hand, since it was closed after opening, an off-gauge was inevitable, and the problem was that tip removal was necessary.

  The present invention has been made to solve the above-described problems. From the host computer, the work roll gap value at the time of rolling is received, and the work roll gap value is changed by the rolling gap and the bias constant to perform rolling. It is an object of the present invention to provide an automatic end plate passing device for a continuous cold rolling mill which is realized by returning to the rolling gap after the distance timer is up after the biting of the machine.

In the automatic cold end rolling device of the continuous cold rolling mill according to the present invention, the thickness of the rolled material is controlled by adjusting the gap between the upper and lower work rolls of the continuous cold rolling mill. Among the existing production data, a high-order computer that generates and transmits a rolling gap table as rolling gap data as transmission information, and a rolling gap table as rolling gap data transmitted from the high-order computer and receives the rolling for control received A program that stores a table consisting of a rolling gap table with a bias value added to the rolling gap table and a bias value as gap data for the plate by means of an operation terminal on the program controller side with respect to the gap table. With the controller Comprising, during the supply plate preparation and rolled Shirinuke changes the roll gap in a rolling gap table + bias value, before the metal in, and when the metal-in the roll gap and rolling gap table + bias value, metal-in-+ After the set length, the rolling gap is changed back to the rolling gap table to reduce the off gauge .

According to the present invention, since the sheet is not manually passed by the operator, it is possible to shorten the tip passing time in the rolling process. For example, there are five rolling mills, 4 m between each rolling mill, 3 m from the sheet-passing standby position to the first rolling mill, and 5 m between the final rolling mill and the take-up reel (24 m in total). In the current manual rolling by the operator, the work roll gap of the first rolling mill is opened, the guide is adjusted so that the plate does not meander, and the first rolling mill is engaged (metal-in). Takes about 20 seconds. Between the rolling mills, guides and gaps are manually opened and closed to pass through the plates. In addition, the plate is stopped halfway, and it takes 90 seconds on average at a rolling material tip speed of 30 m / min. However, in the improvement of the automatic sheet feeding according to the present invention, for example, the rolling gap from the host computer, the first rolling mill 0.082 mm, the second rolling mill −0.584 mm, the third rolling mill −0.932 mm, the fourth rolling mill −0.910 mm 5th rolling mill -0.760mm, bias value, 1st rolling mill 0.500mm, 2nd rolling mill 0.700mm, 3rd rolling mill 0.900mm, 4th rolling mill 1.00mm, 5th rolling mill 1.00mm By adding and opening a gap, the tip can be easily inserted.
In addition, after the biting of the rolling mill (metal-in), the sheet gap can be returned to the rolling gap after the distance timer, so the off-gauge can be reduced.
With automatic threading, it takes 90 seconds on average, but it can be threaded from the threading standby position to the take-up reel in 60 seconds, improving the quality of the material.
Further, by not stopping before the final rolling mill when the tail end comes off, the time currently taking 50 seconds on average is reduced, and it is possible to contribute to the improvement of the operation rate.

Embodiment 1 FIG.
A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, among the production data 1 managed by the host computer (L2), the rolling gap data is generated as transmission information to the program controller (PLC) (L1) as the L2 rolling gap table 2, and the program controller (L1 ) Side L1 rolling gap table 3. A table obtained by adding a bias value to the L1 rolling gap table is stored in the L1 rolling gap table + bias 5 by the operation terminal 4 on the program controller side. In FIG. 2, 6 is a 1st rolling mill, 7 is a 2nd rolling mill, 8 is a 3rd rolling mill, 9 is a 4th rolling mill, 10 is a 5th rolling mill, 11 is a tip material, 12 is an entrance side delivery reel. , 13 is a take-up reel, and 14 is an oil wiping roll provided in front of the first rolling mill 6.
FIG. 3 is a view showing an operation example of the work roll gap, 15 is a work roll, and 16 is a rolled material. FIG. 4 is a diagram showing a setting screen of the operation terminal on the program controller side to which a bias of a gap value is added. In FIG. FIG. 5 is a diagram showing a screen of the program controller side operation terminal for setting a time-up value, wherein 22 is an exit side plate thickness, and 23 is a metal-in + length setting. FIG. 6 is a characteristic diagram showing the relationship between the gap bias and the outlet plate thickness according to the setting of the operation terminal on the program controller side of FIG. 4, and 24 is a characteristic graph of the gap bias and the outlet plate thickness. The gap bias value is calculated from the outlet side plate thickness according to the graph 24 in FIG.

Next, the operation will be described.
In FIG. 3, it is possible to set the biasing setting 21 for the passing plate gap by the operation terminal 4 on the program controller side with respect to the rolling gap of the L1 rolling gap table 3 on the program controller (L1) side, thereby generating the passing plate gap. . Thereby, the front end can be passed through the work roll 15 without becoming a loop.

Embodiment 2. FIG.
In the first embodiment, for the rolling gap of the L1 rolling gap table 3 on the side of the program controller (L1), it is possible to set the biasing setting 21 for the passing plate gap by the operation terminal 4 on the program controller side. In order to return to the rolling gap, the amount of off-gauge can be reduced by providing a metal-in + length (m) setting 23 as shown in FIG.

Embodiment 3 FIG.
In the first embodiment, for the rolling gap of the L1 rolling gap table 3 on the side of the program controller (L1), it is possible to set the biasing setting 21 for the passing plate gap by the operation terminal 4 on the program controller side. It was able to be generated, when the rolled material Shirinuke, for passing plate of the next material to be able to change the gap Tsuban gap (rolling gears-up + bias value), scratching the work rolls 15 Without increasing the operating time.

Embodiment 4 FIG.
In the first embodiment, for the rolling gap of the L1 rolling gap table 3 on the side of the program controller (L1), it is possible to set the biasing setting 21 for the passing plate gap by the operation terminal 4 on the program controller side. Although it was able to produce | generate, a plate | board front-end | tip part may slide on the work roll of the 1st rolling mill 6, and a plate may not pass through by the rolling material with oil coming in the preceding line.
Therefore, the oil wiping roll 14 is provided in front of the rolling mill, and the rotation speed of the roll is controlled by the program controller (L1) using the rolling material, so that the oil can be dropped and the work roll of the first rolling mill 6 can be removed. It can be made easier to metal in.

It is explanatory drawing which showed the front-end | tip automatic threading apparatus of the continuous cold rolling mill in Embodiment 1 of this invention. It is a block diagram which shows the front-end | tip automatic threading apparatus of the continuous cold rolling mill in Embodiment 1 of this invention. It is a figure which shows the operation example of the work roll gap in this invention. It is a figure which shows the setting screen of the operation terminal on the program controller side which adds the bias of the gap value in this invention. It is a figure which shows the screen of the program controller side operation terminal which sets the time-up value in this invention. FIG. 5 is a characteristic diagram showing the relationship between the gap bias and the outlet plate thickness according to the setting of the operation terminal on the program controller side in FIG. 4.

Explanation of symbols

L1 program controller
L2 Host computer 1 Production data 2 L2 rolling gap table 3 L1 rolling gap table 4 Program controller side operation terminal 5 L1 rolling gap table + bias 6 to 10 1st to 5th rolling mill 11 Tip material 12 Entry side delivery reel 13 Winding Reel 14 Oil wiping roll 15 Work roll 16 Rolled material 20 Plate thickness 21 Bias setting for through plate gap 22 Outlet plate thickness 23 Metal-in + length (m) setting 24 Characteristic graph

Claims (2)

By adjusting the gap between the upper and lower work rolls of the continuous cold rolling mill, in the end plate device of the continuous cold rolling mill that controls the thickness of the rolled material,
Among the managed production data, a host computer that generates and transmits a rolling gap table as rolling gap data as transmission information;
The rolling gap table as rolling gap data transmitted from the host computer is received, and the rolling gap table for the control is received by the operation terminal on the program controller side for the rolling gap table for control. A rolling gap table to which a bias value is added and a program controller for storing a table consisting of bias values as gap data for a plate,
Rolling gap is changed to rolling gap table + bias value at the time of plate preparation and rolling material bottom out. Before and during metal-in, rolling gap is set to rolling gap table + bias value, metal-in + set length After that, the tip automatic passage device of the rolling mill is characterized in that the rolling gap is changed back to the rolling gap table to reduce the off gauge .   2. The automatic leading end plate passing device for a rolling mill according to claim 1, wherein the operation terminal is provided with a function for setting a timing for returning the passing plate gap on the program controller side to the rolling gap.

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