JPH0469488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for disposing a small-diameter floating roll between large-diameter work rolls that are spaced apart from each other vertically, and controlling the circumferential speed of the exit roll of the work roll. The present invention relates to a device for rearranging the work rolls in a variable speed rolling mill that rolls a strip between the work roll and the floating roll at a circumferential speed higher than that of the entry roll.

Conventional technology In a normal two-high or four-high roll rolling mill,
A roll changing rail is installed in the housing so that it can be raised and lowered, and during rolling, the roll changing rail is lowered and the rolls are directly supported by the housing. When changing the rolls, the roll changing rail is raised, and the rolls are pulled out of the housing and pushed into the housing via the roll changing rails and a fixed rail installed on the operation side of the housing.

Problems to be Solved by the Invention In different speed rolling, the lower threading guide table and the floating roll set lever swing as shown in FIG. 6 during threading. Therefore, if there is a rail for changing rolls in the housing, it will interfere with the guide table and the set lever.

Means for Solving the Problem A fixed rail is installed in the housing and on the operation side of the housing perpendicular to the pass line, a movable rail is slidably supported on the fixed rail, and the movable rail and lower work roll are supported on the fixed rail so as to be slidable. A reciprocating drive device (hydraulic cylinder) is provided that is detachably connected to the reciprocating drive device, and when changing rolls, the reciprocating drive device is connected to the moving rail, the moving rail is inserted into the housing by the reciprocating drive device, and then the reciprocating drive device is connected to the lower work roll, and the lower work roll or the upper and lower work roll set is pulled out from inside the housing or pushed into the housing by a reciprocating drive device.

Function A single reciprocating drive device (hydraulic cylinder) pulls out the moving rail and work roll from inside the housing or pushes them into the housing to rearrange the rolls.

The moving rail is inserted into the housing only when changing rolls, and is stored under the floor on the operation side during rolling.

Embodiment In FIGS. 1 to 6, 1 is a housing of a rolling mill, 2 and 3 are upper and lower large-diameter work rolls, 4 is a lower reduction cylinder provided in the housing 1, and 5 is a balance provided in the housing 1. cylinder,
6 is a fixed rail provided on the housing 1; 7 is a fixed rail provided on the operating side of the rolling mill; 8 is a movable rail that slides on the chevron-shaped sliding surfaces of the fixed rails 6 and 7; 9 is a fixed rail 6; 7 is a reciprocating drive device such as a hydraulic cylinder installed in parallel; 10 is a bogie rail installed inside the fixed rail 7; 11 is a bogie attached to the tip of the reciprocating drive device 9 and runs on the rail 10; 12 1 is a removable connecting pin that connects the truck 11 and the moving rail 8; 13 is a removable connecting pin that connects the truck 11 and the lower work roll 3;
4 is a bracket for inserting the connecting pin 13 provided on the roll chock of the lower work roll, 15 is a recombination spacer interposed between the upper work roll 2 and the lower work roll 3, and 16 is provided protruding from the upper surface of the spacer 15. 17 is a small-diameter floating roll; 18 is a steel strip wrapped around the right half of the upper and lower work rolls 2 and 3 and the left half of the floating roll 17; 19 is a floating roll; A set lever, 20 is a hydraulic cylinder for rotating the set lever 19, 21 is a lower threading guide table, 22
is a hydraulic cylinder that rotates the guide table 21.

The order in which a new roll is brought to the in-machine rolling position is to insert the rail sliding connecting pin 12 into the hole of the rail 8 and the hole of the wheeled trolley 11, connect it, and push it out to the forward end using the hydraulic cylinder 9 (first 3), the connecting pin 12 is removed and the piston of the cylinder 9 is moved back. Next, place the lower large-diameter work roll 3 on the moving rail 8 outside the machine, and place the rearrangement spacer 15 on top of it.
Then, the upper large diameter work roll 2 is placed on the spacer 15.

When the above work is completed, insert the roll change connecting pin 13 into the bracket 14 attached to the chock of the lower large-diameter work roll 3 and the hole in the trolley 11, and connect the upper and lower large-diameter work rolls 2 and 3 to the hydraulic cylinder. 9 into the housing 1, and the thrust plate is fitted and fixed to the operating side chock of the upper large diameter work roll 2. Next, the chock of the upper large diameter work roll 2 is pushed up by the balance cylinder 5 until it comes off the pin 16, and then the lower large diameter work roll 3 and the recombinant spacer 15 are pulled out of the housing 1.
Only the recombinant spacer 15 is removed using a crane or the like, and the lower large-diameter work roll 3 is pushed into the housing 1 again and the thrust plate is fitted in the same way.Then, the roll 3 is pushed up by the lower pressure cylinder 4 and the moving rail 8 is moved to the fourth The rolls are removed from the machine as shown in the figure, and the roll change is completed. Also, when unloading the roll, perform the procedure in reverse to the above.

At the time of sheet passing after the roll change has been completed, the moving rail 8 is pulled out from the housing 1, as shown in FIG. Therefore, as shown in FIG. 6, when rotating the floating roll set lever 19 and the lower plate passing guide table 21 from the solid line position to the chain line position, the moving rail 8 controls the movement of the set lever 19 and the guide table 21. Not hinder.

Effects of the Invention By carrying out the present invention, it is possible to mechanically rearrange the upper and lower work rolls without interfering with the operation of the floating roll set lever and the lower threading guide table during threading.

A single hydraulic cylinder is used to reassemble the work rolls for pulling out and pushing moving rails.
The structure is simple and the equipment cost is low.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the roll changing device for different speed rolling of the present invention, FIG. 2 is a front view of FIG. 1,
Figure 3 is a plan view of Figure 1, Figure 4 is a drawing similar to Figure 3 with the moving rail pulled out, and Figure 5 is a plan view of Figure 1.
The figure is a view taken along the line A--A in FIG. 1, and FIG. 6 is a diagram showing the arrangement of the roll changing rail, the rolling strip passing guide table, and the floating roll set lever. DESCRIPTION OF SYMBOLS 1... Rolling mill housing, 2, 3... Upper and lower work rolls, 6, 7... Fixed rail, 8... Moving rail, 9... Reciprocating drive device, 11... Cart, 15
...Spacer for recombination.

Claims (1)

[Claims] 1. A fixed rail installed inside the housing and on the operating side of the housing perpendicular to the pass line, a movable rail slidably supported on the fixed rail, and a lower rail that runs on the movable rail during roll change. A work roll, and a reciprocating drive device detachably connected to the moving rail and the lower work roll, the reciprocating drive device being connected to the moving rail when the rolls are changed, and the moving rail being moved into the housing by the reciprocating drive device. and then the reciprocating drive device is connected to a lower work roll, and the lower work roll or the upper and lower work roll set is pulled out from inside the housing or pushed into the housing by the reciprocating drive device. Roll changing device.