JPS6312686B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a roll chock attachment/detachment device for rolling mill rolls, and more specifically, by simultaneously supporting two pairs of roll jocks using air bearings, the roll chocks can be easily attached/detached without damaging the bearings in the roll chocks. The present invention relates to a roll chock attachment/detachment device that can perform the following operations.

Conventionally, rolls in rolling mills often need to be replaced, regrinded, or updated as the speed of rolling mills increases, and the rolls and roll jocks must be attached and detached each time, but rolls in commercial rolling mills Even in the case of work rolls, the roll itself and each roll chock each weigh a considerable amount, and the gap between the inner diameter of the bearing and the roll neck is only about 0.2 mm. The work of attaching and removing such heavy roll yoke has heretofore been generally carried out by cranes and by hand, but this work is not only extremely difficult but also involves great danger.

Therefore, as in Japanese Patent Publication No. 53-11271, an air bearing is also adopted, and a method and device for lifting the chock by using the air film created by the air diaphragm, keeping the fitting relationship between the roll and the chock in a flexible and smooth state, and moving the chock using power. , or Tokuko Sho 44-
Lift the roll using hydraulic pressure like 12571 2
Devices for attaching and detaching rolls and chock at the same time have been proposed and used.

However, with the former, the chock cannot be attached and detached from the two-stage roll at the same time, and with the latter, the fitting relationship between the roll and the chock cannot be maintained in a flexible and smooth state.
Including oil seals, etc. ), and
The disadvantage is that the equipment is complex and expensive.

Therefore, the inventors of the present invention have found that the above-mentioned problems can be solved by supporting a pair of upper and lower rolls by a roll face, and by individually supporting two pairs of roll jocks simultaneously by air bearings, and have arrived at the present invention.

According to the present invention, a U-shaped upper roll chock support mechanism when viewed from the roll axis direction, a lower roll chock support mechanism that fits into the U-shaped hollow part of the upper roll chock, and the roll faces of the upper and lower rolls are integrally supported. There is provided a roll chock attachment/detachment device comprising a roll support mechanism, and wherein the upper and lower roll chock support mechanisms are both supported by air bearings.

An object of the present invention is to provide a device that simultaneously supports a pair of upper and lower rolls each incorporating a pair of roll jocks, and that can attach and detach the roll jocks without damaging the bearings.

Another object of the present invention is to provide a roll chock attachment/detachment device which allows for easy alignment of bearings, high work efficiency and safety, and which allows two stages of roll chocks to be attached and detached at the same time.

The present invention will be explained in detail below using Examples.

1 and 2 are a plan view and a partially sectional front view, respectively, of an embodiment of the device of the present invention, and FIGS. 3 to 5 are side views showing the operating state of the embodiment of the present invention.

Each roll face 10 of the upper and lower rolls 10 and 11
F and 11F are vertically supported by the roll support stand 3, and each roll neck 1 of the rolls 10 and 11
Roll chokes 12 and 13 are attached to 0N and 11N, and the lower part of each roll choke is attached to the floor surface 5.
A plurality of air bearings 32 and 33 are provided between the
It is vertically supported by chock support stands 30 and 31 provided with. Lower roll chock support stand 31
passes through a vertical hole 24 bored in the U-shaped bottom of the upper roll chock support 30 (see FIG. 3), and is connected to the upper roll chock support 30 by the same floor surface 50 via an air bearing 33. Supported. There is a gap between the inner wall of the vertical hole 24 and the lower roll chock support 31, and the chock support 31 can move freely within a certain range.
Further, the chock detachable cart 2 integrally includes upper and lower roll chock support stands 30, 31, and is capable of horizontal movement in the roll axis direction by cylinders 4, 4 along the rails 1, 1 (Fig. 1, 2
(see figure). Hereinafter, the present invention will be explained in detail through explanation of the effects based on examples.

3 to 5 are side views of the apparatus according to the embodiment of the present invention, and more specifically, FIG. 3 shows the case where both the upper and lower bearings are in a perfectly aligned state,
FIG. 4 shows a case where the lower roll bearing is eccentric, and FIG. 5 shows a case where the upper roll bearing is eccentric.

That is, in the case of FIG. 4, only the air bearing 33 of the lower roll choke support 31 is blown to raise the support 31 for alignment, while in the case of FIG. Alignment can be easily performed by raising only the support stand 30 by blowing. Then, after bringing the bearing into a nearly aligned state as shown in Figure 3, the upper and lower roll jocks 12 and 13 containing the bearing are
Due to the action of cylinders 4, 4, roll neck 1
Can be removed or attached to 0N and 11N at the same time.

In the past, supporting the upper and lower roll jocks individually at the same time may have been done using hydraulic pressure, but in contrast, the present invention uses air bearing support, which not only makes alignment easier. First, due to the cushioning effect, there is almost no damage to the bearing when the roll chock is attached or detached. In addition, since the frictional resistance of the air bearing is extremely small, a compact horizontal (roll axis) direction drive mechanism such as the cylinders 4, 4, etc. in the embodiments is sufficient. Therefore, if it is small, it is possible to horizontally move it manually, or by using a chain or steel cable instead of a cylinder, or by installing a drive wheel driven by an air motor (or an electric motor) on the bottom of the chock detachable cart 2. It can also be installed and made to run on its own.

Note that FIG. 6 is a side view showing another embodiment of the roll chock detachable cart according to the present invention, in which the lower roll chock support stand 31 is placed on the U-shaped bottom of the upper roll chock support stand 30. It is a form. This type has the disadvantage that the position of the lower roll chock support 31 is affected by the positioning of the upper roll chock support 30, but if the alignment order is considered, the same purpose can be achieved and the overall structure can be made more sturdy. There is an advantage.

Further, FIG. 7 is a side view showing an embodiment of the upper and lower two-stage roll support base 3 in FIGS. 1 and 2. In FIG.
In this embodiment, a pair of arms 16, 16 are pivotally connected to the support base 3 by pins 17, 17, and are always opened upward by cylinders 18, 18 before a roll is placed on the support base 3. When two two-stage rolls are placed simultaneously by a crane, the arms 16, 16 close after the lower roll passes and support the upper roll. However, the present invention is not limited to this type, and other types of roll support devices, such as horizontally moving arms, can of course be used.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a plan view and a partially sectional front view of an embodiment of the present invention, and FIGS. 3, 4, and 5 respectively.
The figure is a side view showing the operating state of the embodiment of the present invention.
The figure is a side view showing another embodiment of the roll chock detachable truck according to the present invention, and FIG. 7 is a side view of the roll support stand. 1...Rail, 2...Chiyock removable trolley, 3...
...Roll support stand, 4...Cylinder, 7...Roll chock attachment/detachment device, 10...Top roll, 11...
Lower roll, 10N, 11N...Roll neck, 1
2...Upper check, 13...Lower check, 16...
... Arm, 17 ... Pin, 18 ... Air cylinder, 24 ... Vertical hole, 30 ... Upper choke support,
31... Lower chock support base, 32, 33... Air bearing, 50... Floor surface.

Claims (1)

[Scope of Claims] 1. An upper roll chock support mechanism that is U-shaped when viewed from the roll axis direction; a lower roll chock support mechanism that fits into the U-shaped hollow portion of the upper roll chock;
The roll chock attachment/detachment device further comprises a roll support mechanism that integrally supports the roll faces of the upper and lower rolls, and each of the upper and lower roll chock support mechanisms is supported by an air bearing. 2. Claim 1, wherein the lower roll chock support mechanism passes through the U-shaped bottom of the upper roll chock support mechanism, and is individually supported by air bearing on the same floor as the upper roll chock support mechanism. roll chock attachment/detachment device. 3. The roll chock attachment/detachment device according to claim 1, wherein the lower roll chock support mechanism is mounted on the U-shaped bottom of the upper roll chock support mechanism via an air bearing.