JPH0461724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roll rolling mill, and particularly to a spindle support used when changing rolls of a rolling mill.

BACKGROUND ART (1) As shown in FIG. 4, a typical type supports upper and lower rolls at fixed positions, and there is only one roll change position. Generally, when changing the upper large-diameter work roll, wheels are installed on the bearing box of the lower large-diameter work roll, and the wheel is placed on the changing rail and carried out of the rolling mill, and the lower large-diameter work roll is carried out outside the machine. A recombinant spacer is placed on the bearing box of the roll and carried into the machine, an upper large-diameter work roll is placed on this spacer, and the lower work roll spacer and upper work roll are carried out of the machine again at the same time.

The replacement spacer has a protruding pin for positioning and preventing the upper and lower rolls from shifting, so when loading and unloading the spacer,
The upper roll is pushed up by the hydraulic cylinder of the rolling mill so that the pin does not interfere with the lower part of the upper large-diameter work roll. Lower the rolls from this push-up position and place the upper and lower spindles at 0.
1 and 02 are supported by spindle supports 03 and 04, and the upper and lower rolls and spacer are pulled out as a unit toward the operation side. The installation of a new roll is carried out in the reverse order of the above-mentioned removal.

(2) Two switching solenoid valves are installed to hold the upper and lower spindles separately.

(3) A porter bar for transporting and transporting recombinant spacers.

Problems to be Solved by the Invention (1) In the format shown in Fig. 4, there is only one roll change position, and as in the case of four-high rolling and two-high rolling in the same rolling mill, large-diameter work rolls are It cannot be applied when it is necessary to hold the spindle in two different positions when changing the structure.

(2) A device with two switching solenoid valves is expensive and uneconomical.

Furthermore, since the support is installed in a location that cannot be seen visually, there is a risk that the upper and lower electromagnetic switching valves may be operated incorrectly and the spindle may fall.

(3) The method of using porter bars has problems such as the lack of space near the rolling mill, which makes it difficult to carry in and insert positioning pins, and it takes a lot of time to rearrange.

Means for Solving the Problems As shown in FIG. 3, the spindle boss is gripped from above and below, and a spring is inserted into the upper gripping member to hold the spindle boss so that it can move upward.

Function Since the upper gripping member of the spindle boss is elastically supported, the upper work roll can be lifted without changing the position of the spindle support, such as when inserting a spacer into the lower surface of the upper work roll bearing. .

Embodiment In FIGS. 1 and 2, 1 is an upper work roll, 2 is a lower work roll, 3 is an upper roll bearing,
4 is the lower roll bearing, 5 is the rolling mill housing,
6 and 7 are upper and lower brackets fixed to the housing 5, 8 are two vertical guide bars arranged between the upper and lower brackets 6 and 7, and 9 and 10 are slidably supported by the guide bar 8. The upper and lower frames 11 and 12 are hydraulic cylinders that are attached to the upper and lower brackets 6 and 7 to raise and lower the upper and lower frames 9 and 10, and 13 and 14 are the upper and lower frames 9 and 10.
horizontal guide bars, two each installed in the
15 is a set of grippers slidably supported by a horizontal guide bar 13 within the upper frame 9;
17 is a hydraulic cylinder that connects one set of grippers 15; 18 is a hydraulic cylinder that connects one set of grippers 16; 19 is a hydraulic cylinder that connects one set of grippers 15; is a lower fixed seat of the gripper 15, 20 is a lower fixed seat of the gripper 16, 21 is an upper movable seat of the gripper 15, 22 is an upper movable seat of the gripper 16, and 23 is pivotally supported by the gripper 15 and has the upper movable seat 21 at one end. Attach the other end to the spring 24
A lever 25 is connected to the gripper 16 and has an upper movable seat 22 at one end and a spring 2 at the other end.
6, levers 27, 27' are stoppers attached to the vertical guide bar 8, 28, 29 are upper and lower spindles, and 30, 31 are bosses of the upper and lower spindles 28, 29.

In such a device, the heights of the frames 9, 10 are adjusted by hydraulic cylinders 11, 12, and the spindle bosses 30, 31 are gripped by grippers 15, 16 by hydraulic cylinders 17, 18.
This is done by horizontally moving the

In FIGS. 1 and 2, the frames 9 and 10 are in a position where they are in contact with the stoppers 27 at the upper and lower ends, that is, in a four-high rolling state.

When the hydraulic cylinders 11 and 12 are driven, the frames 9 and 10 move inwardly along the guide bar 8 and reach a position where they abut against the inner stopper 27', that is, in a two-stage rolling or different speed rolling state.

When inserting the lower roll 2 and a spacer (not shown) below the upper roll 1 during roll change, the upper and lower frames 9 and 10 are held at the roll change position, and the hydraulic cylinder of the rolling mill is used to insert the lower roll 2 and spacer (not shown) under the upper roll 1. Lift up the upper roll 1.

Then, the boss 30 of the spindle 28 separates from the lower fixed seat 19 and pushes up the upper movable seat 21, and the lever 2
3 rotates against the spring 24.

After the spacer is inserted under the bearing 3 of the upper roll 1, the upper roll 1 is lowered, and with the upper roll 1 gripped on the lower roll 2 via the spacer, the upper and lower rolls and the spacer are integrated. Pull it out from the housing 5 toward the operation side.

When lowering the upper roll 1 using the above procedure,
The boss 30 is again seated on the lower fixed seat 19, and the upper movable seat 21 presses the upper surface of the boss 30 by the elasticity of the spring 24.

Effects of the Invention (1) The spindle can be held at different work roll positions in four-high rolling, two-stage rolling, different speed rolling, etc., that is, at different spindle positions, when changing rolls.

(2) When replacing the rolls, when inserting a spacer under the upper roll, the upper roll can be lifted without operating the hydraulic cylinder of the roll support.

(3) Once the spacer has been inserted under the upper roll, the spindle is held at the roll change position again, so there is no need to adjust the spindle position when changing the rolls.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the spindle support device of a rolling mill according to the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a drawing similar to Fig. 2 explaining the present invention, and Fig. 4. is a side view of a conventional device. 5... Rolling mill housing, 6, 7... Upper and lower brackets, 8... Vertical guide bar, 9, 10...
Upper and lower frames, 11, 12...hydraulic cylinders,
13, 14...Horizontal guide bar, 15, 16...
Grizzper, 19, 20...lower fixing seat, 21,
22... Upper movable seat, 23, 25... Lever, 2
4, 26... spring, 27... stopper.

Claims (1)

[Scope of Claims] 1. A vertical guide bar disposed close to the rolling mill housing on both sides of the spindle, upper and lower frames that move up and down along the vertical guide bars, a hydraulic cylinder that moves up and down the frames, and a hydraulic cylinder that moves up and down the frames. A stopper for positioning the frame,
A pair of grippers are supported by each of the frames and move relative to each other to grip the spindle, and the frame is raised and lowered to a predetermined height, and the gripper holds the spindle at a predetermined position. Spindle support device for rolling mills. 2. Vertical guide bars located close to the rolling mill housing on both sides of the spindle, upper and lower frames that move up and down along the vertical guide bars, hydraulic cylinders that move the frames up and down, and stoppers that position the frames. ,
A spindle support device for a rolling mill, comprising a pair of grippers that are supported by each of the frames and move relatively to grip the spindle, and that raises and lowers the frame at a predetermined height and holds the spindle at a predetermined position by the grippers. The gripper is provided with a lower fixed seat and an elastically supported upper movable seat, and when the spindle held in a predetermined position is pushed up by the gripper, the spindle separates from the lower fixed seat and floats upward. A spindle support device for a rolling mill, which is characterized by being wetted.