JPS6030732B2 - Continuous cold rolling annealing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous cold rolling annealing apparatus in which a cold rolling mill and a continuous annealing furnace are connected.

Conventionally, the cold rolling mill and the continuous cold-blurring furnace were usually installed on separate lines.

The reason why a continuous line between the cold rolling mill and the Rentsugi sintering furnace was not realized was because the line would stop due to rolling problems in the cold rolling mill, resulting in extremely low operating rates.
In other words, a cold rolling mill continuously rolls the strip at high speed, but there are defects such as bald eaves on the strip original plate.
Strip breakage may occur suddenly during rolling due to defects in welding of the original strip prior to cold rolling.

At this time, the operation of the cold rolling mill is immediately stopped, but due to the delay in operation or the inertia of the strip running at high speed, the strip continues to run for a considerable length even after the plate breaks. Meanwhile, before annealing the strip in a continuous annealing furnace,
It is necessary to remove deposits such as cold rolling oil and iron powder that adhere to the plate surface of the strip, and for this purpose, a deposit removal device, such as an electric cleaning device, is installed on the entrance side of the continuous dulling furnace. .

A welding machine for welding and connecting the strips is also installed on the entry side of the Rentsugi sintering anchor furnace. The electric cleaning device and welding machine provided on the entry side of the continuous annealing furnace become equipment subsequent to the cold rolling mill when the cold rolling mill and the continuous annealing furnace are installed as a continuous line. Therefore, the strip running after the plate breaks during cold rolling may damage the following equipment, and it may take a lot of effort and a long time to extract it and restart the work by thrusting into the following equipment in an unstable state. This results in a decrease in the operating rate.

In addition, the rolling speed of cold rolling mills is generally higher than that of Rentsugi sintering furnaces, and rolling mills require a lot of work such as roll change, adjustment, and roll maintenance. Due to the fact that there are no line stops, etc., it was unthinkable to install a continuous line with a rolling mill and a Rentsugi-yaki Hina oven.

The present invention was made as a result of various studies in order to solve the above-mentioned problems and to form a continuous line between a cold rolling mill and a continuous cold anchor furnace. A continuous cold rolling annealing apparatus characterized in that the cold rolling mill and the looper are connected via a looper, a coil reel is provided between the cold rolling mill and the looper, and a strip accumulator is provided in front of the coil reel, The purpose is to improve rolling mill, reduce unit consumption, and simplify equipment and processes by using a continuous line with a rolling mill and annealing furnace.

The present invention will now be described in detail with reference to an illustrative embodiment.

In the drawing, a strip S supplied from a bay-off mill through a loop car 2 is rolled by a cross-rolling mill 3.

The cold-rolled strip S is subjected to an electric cleaning device 4 to remove deposits on the plate surface, and then passed through a looper 5 to a continuous hammering furnace 6. The continuous pseudo-blunt furnace 6 in this embodiment includes a direct flame stop heating furnace 7,
It consists of a soaking furnace 8, a primary cooling furnace 9, an overaging furnace 10, and a secondary cooling furnace 11.

The strip S that has been annealed by the lotus continuation is processed by a skin pass mill 12 and wound up by a winder 13. 14 is an oil applicator 15 is a trimming machine.

In the present invention, the cold rolling mill 3 and the continuous phosphorus annealing furnace 6 are connected by a looper 5, but the cold rolling mill 3
A coil reel 16 is provided between the coil reel 16 and the looper 5, and when the 3rd part of the cold rolling mill stops the line for some reason, the coils pre-installed on the coil reel 16 are rewound and rolled continuously. The strip S is supplied to the Akatsuki Anchor Furnace 6, and the operation of the continuous Akatsuki Anchor Line continues.

On the other hand, when the Rentsugi sintering line was stopped due to an accident in which the strip S broke in the furnace, the strip S rolled in the cold rolling mill 3 was wound up by the coil reel 16 and cooled. We are working to ensure the operation of the rolling line.

Furthermore, even if, for example, the strip S suddenly breaks during rolling in the cold rolling mill 3 and the operation of the cold rolling mill 3 is suddenly stopped, the strip S after the breaking will continue to travel considerably due to inertia. , this plate, the subsequent equipment of the cold rolling mill 3, that is, the welding machine 1
7. A strip accumulator 18 is installed between the cold rolling mill 3 and the coil reel 16 to prevent damage to the electric cleaning device 4.
The strip S after the plate breakage is prevented from running behind 8.

Details of the strip accumulator 18 are shown in FIGS. 2 and 3.

19-1, 19-2, 19-3 in Figures 2 and 3
are rolls provided on the strip threading surface 21, 20-1 and 20-2 are movable rolls that are vertically movable;
Usually, a counterweight 25 is installed above the strip passing surface 21, and the moving rolls 20-1, 20-1 and 20-1 are movable downward when the strip S breaks in the cold rolling line. The second bearing portion 22 is engaged with a frame 24 in which a guide groove 23 is provided.

However, when the plate breaks, the chain gear that transmits the heavy hanging action of the counterweight 25 is disengaged based on the information about the break, and the moving rolls 20-1 and 20-2 move to a predetermined lower position, and after the plate breaks, This prevents the strip from running backwards from the strip accumulator 18, thereby preventing damage to subsequent equipment such as the electric cleaning device 4 and the welding machine 17. Note 2
6 is a chain. Even if the cold rolling line stops due to plate breakage, the coil reel 16 is installed behind the strip accumulator 18, so the coil can be unwound from the coil reel 16 and stripped to the continuous competitive slowing furnace 6. can be supplied.

Note that 30 is a shear provided at the rear of the coil reel 16. Since the present invention is as described above, the cold rolling mill 3
The Renzuki hammer furnace 6 can be made into a continuous line, which has great effects such as improving the production speed and simplifying the equipment and process.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of a strip accumulator of the present invention, and FIG. 3 is a sectional view taken along the line (A--A) of FIG. 3... Cold rolling mill, 5... Looper, 6... Continuous Akatsuki anchor furnace, 16... Coil reel, 17... Welding machine, 18
...Accumulator, 20...Movement roll. Hair diagram 2nd diagram

Claims (1)

[Claims] 1. A cold rolling mill and a continuous annealing furnace are connected through a looper, a coil reel is provided between the cold rolling mill and the looper, and a strip accumulator is provided in front of the coil reel. Continuous cold rolling annealing equipment.