JPS6343706A - Device for ejecting floating roll and preventing dislodgment of said of differential speed rolling mill - Google Patents

Abstract

PURPOSE:To prevent the dislodgment of a floating roll at the time of sheet breakage and to facilitate roll ejection by pressing bearings at both ends of the floating roll by hydraulic or pneumatic cylinders to press the floating roll to work rolls. CONSTITUTION:Sliding frames 11 actuated by the hydraulic or pneumatic cylinders 10 are slidably provided to guide parts 9 of a stationary base 8 of a differential speed rolling mill. Brackets 12 at the top ends thereof are held pressed to the. bearings 7 of the floating roll 3 positioned between an upper and lower work rolls. The cylinders 10 are actuated and the floating roll 3 is pressed to the upper and lower work rolls when the sheet breakage arises at the time of rolling; therefore, the dislodgment thereof is prevented. The upper work roll is raised a ind the cylinders 10 are extended at the time of ejecting the floating roll 3. The roll 3 is then pushed out and is transferred onto a floating roll set lever; therefore, the ejection thereof is extremely easy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a floating roll with a small diameter disposed between large-diameter stripping rolls arranged vertically at intervals, and a floating roll with a small diameter disposed between large-diameter stripping rolls disposed vertically at intervals, Make the peripheral speed faster than the peripheral speed of the entry roll,
The present invention relates to a device for preventing the floating roll from falling off when the strip is cut in a true speed 8E rolling mill that rolls the strip between the work roll and the floating roll.

BACKGROUND ART In a general variable speed rolling mill shown in FIG. 4, 1.2 is a large diameter working hole, 3 is a small diameter floating roll, 4 is a strip plate, and
, 6 is a coiler for winding up the strip 4.

The strip plate 4 is provided around the right half of the upper and lower work rolls 1 and 2 and the left half of the floating roll 3.

Assuming that the strip 4 is fed out from the coiler 5, rolled by the rolls 1 and 2°3, and wound up by the coiler 6,
The lower work roll 2 is an entry roll, the upper work roll 1 is an exit roll, and the peripheral speed of the upper work roll 1 is faster than the peripheral speed of the lower work roll 2.

The floating roll 3 is supported by the work rolls 1 and 2 and a strip placed on the left half circumference so that the floating roll 3 can move in position t4. Roll.

Problems to be Solved by the Invention The floating roll does not have a roll chock and is supported in a floating state by the work roll and the strip (C), so when the strip is cut, the floating roll falls off. If the rolls fall off, it is difficult to remove the rolls due to the structure of the rolling mill, and the rolls are further damaged.

Means for solving the problem: Bearings are installed at both ends of the floating roll, and horizontally sliding frames are installed inside the drive and operating sides of the housing, and the sliding frames are hydraulically operated during rolling. Alternatively, the tip of the frame is pressed against the bearing by advancing with a pneumatic cylinder to prevent the floating port from falling when the strip is cut during rolling.

During active rolling, the hydraulic or pneumatic cylinder expands and contracts following the positional changes of the floating rolls, so there is no problem with the movement of the floating rolls.

When the strip is cut, the tip of the sliding frame suppresses the floating roll to prevent it from falling off.

When carrying out the floating roll, a hydraulic or pneumatic cylinder extends to push out the floating roll and transfer it to the floating roll set lever.

Embodiment In FIGS. 1 to 4, 1.2 is a large-diameter forming roll under two inches, 3 is a small-diameter floating roll, 4 is a strip, and 7 is a bearing fitted to the west end of the floating roll 3. , 8 is a fixed base equipped with a guide part 9, 10 is a hydraulic or pneumatic cylinder whose rear end is pivotally connected to the fixed base 8, 10a is a piston rond of the hydraulic or pneumatic cylinder 10, and 11 is a piston rond of the hydraulic or pneumatic cylinder 10. [rho]Slideably supported sliding] 1/-m; 12 is a bracket that connects the front end of the piston rod 10i and the front end of the sliding frame 11;

During rolling, the hydraulic or pneumatic cylinder 10 is extended to press the front end of the bracket 12 against the outer periphery of the bearing 7.

Therefore, when the strip 4 breaks, the floating roll 3
It is supported between the bracket 12 and the upper and lower millet rolls 1 and 2 and does not fall off.

When carrying out the floating roll, the upper work roll 1 is raised and the hydraulic or pneumatic cylinder 10 is extended, thereby pushing out the floating roll 3 and passing the receiver to a floating roll set lever (not shown).

Effects of the Invention By carrying out the present invention, it is possible to prevent the floating roll from falling when the strip is cut.

When carrying out the floating roll, the floating roll is pushed out and the receiver is passed to the floating roll set lever.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an example of a device for preventing floating rolls from being carried out and falling off in a variable speed rolling mill according to the present invention, Fig. 2 is a view taken along arrow A-A in Fig. j B - B sectional view, FIG. 4 is a schematic overall view of a shelf of a general different speed rolling mill. 1.2... Working u-ru, 3... Floating o-ru 4... Band plate, 7... Bearing, 8
...Fixed R~S 10...Hydraulic or pneumatic cylinder 11...Sliding frame fee Embedded Patent attorney Shige Okamoto 2 other people

Claims (2)

[Claims] (1) A small-diameter floating roll is arranged between large-diameter work rolls arranged vertically at intervals, and the peripheral speed of the exit roll of the work roll is made faster than the peripheral speed of the input roll, and the work roll In a different speed rolling mill that rolls a strip between a floating roll and a floating roll, a hydraulic or pneumatic cylinder is provided to press the floating roll at the rolling position toward the distance between the work rolls, and bearings are fitted at both ends of the floating roll. Unloading of floating rolls in a different speed rolling mill, characterized in that the floating rolls during rolling are pressed against the work rolls via the bearings by the hydraulic or pneumatic cylinder so that the floating rolls can be moved in position. and fall prevention device. (2) A small-diameter floating roll is arranged between the large-diameter work rolls arranged vertically at intervals, and the peripheral speed of the exit roll of the work roll is higher than the peripheral speed of the input roll, and the work roll In a different speed rolling mill that rolls a strip between a floating roll and a floating roll, a hydraulic or pneumatic cylinder is provided to press the floating roll at the rolling position toward the distance between the work rolls, and bearings are fitted at both ends of the floating roll. equipped, the floating roll during rolling is pressed against the work roll via the bearing by the hydraulic or pneumatic cylinder so as to be able to change its position, and when the floating roll is carried out, the floating roll is pushed out by the hydraulic or pneumatic cylinder, A floating roll unloading and falling-off prevention device in a different speed rolling mill, characterized in that the floating roll is delivered to a floating roll set lever installed on the opposite side.