JPH0118806B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a rolling mill, particularly the roll section.

[Prior Art] As is well known, a rolling mill rolls a material to be rolled between at least a pair of upper and lower rolls provided on a roll stand, and shafts located at both ends of these rolls are equipped with roller bearings or the like. It is rotatably supported on the roll stand via a chock equipped with a bearing.

By the way, when you want to roll wire rods or plates with relatively high precision, there are limits to the rolling precision of conventional general rolling mills, so you may need a special rolling mill to perform high-precision rolling. be.

[Problems to be Solved by the Invention] The following may be considered as one of the causes of low rolling accuracy in general rolling mills. That is, due to its structure, the bearing housed in the chock inevitably has some play in the radial direction, and the roll can move up and down by the amount of play. Therefore, the weight of the rolls and the hardness of the material to be rolled interact with each other, causing the upper roll to move up and down slightly, thereby deteriorating rolling accuracy.

Moreover, when only the lower roll is driven to rotate by power and the upper roll is driven to rotate, there is a problem in that it is difficult for the rolls to rotate smoothly.

Another problem is that when rolling is performed while flowing rolling oil, a portion of the rolling oil flows to the chock side, causing the bearing lubricating oil grease in the chock to be washed away.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rolling mill that can improve rolling precision with a simple structure, allow smooth roll rotation, and prevent rolling oil from flowing into the chock. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the rolling mill developed by the present inventor includes upper and lower rolling rolls that are rotatably supported on a roll stand by chock having bearings; A means for supplying rolling oil, and a means for supplying rolling oil, which is made of an elastic material and is attached between each chock and the roll main body of both of the rolls, so that the upper roll is pushed up and the chock is brought into elastic contact with each other. It is characterized by having an elastic ring that separates the roll body from the roll body.

[Function] According to the present invention configured as described above, it is possible to constantly apply a pushing up force to the upper roll by the repulsive force of the elastic ring, thereby reducing the play of the bearing provided in the chock. The rolling accuracy can be improved. In addition, the rotational force of one roll can be transmitted to the other through the elastic ring, and the load on the bearing can be reduced by the push-up force of the roll by the elastic ring, allowing smooth rotation of the upper and lower rolls. It also has the advantage of being able to

Since the elastic ring is interposed between the roll body and the chock, it is possible to prevent rolling oil supplied onto the roll from flowing into the chock.

[Example] An example of the present invention will be described below with reference to the drawings. 1 in Figure 1 and Figure 2
is a bed, and a roll stand 2 is attached to this bed 1. This roll stand 2 is provided with upper and lower rolling rolls 3 and 4. These rolls 3 and 4 are rotatably supported via jocks 5 and 6 containing bearings such as roller bearings. Also, the lower roll 4
is rotatably driven by a motor (none of which is shown) via a joint provided in the joint cover 7. Note that the upper roll 3 may also be rotated by a motor in synchronization with the rotation of the lower roll 4.

Furthermore, rolling oil is supplied onto the rolls 3 and 4 by a rolling oil supply means using rolling oil supply hoses 10 and 11 and the like. This rolling oil is passed through a filter (not shown) and is circulated for use. Further, 12 in the figure is a pressure screw, and this pressure screw 12 can be moved up and down by a manual handle 14 or a pressure motor (not shown) through a pressure gear mechanism 13. This makes it possible to adjust the amount by which the upper roll 3 is rolled down.

And 1 elastic ring on each of the upper and lower rolls 3 and 4.
5, 15, 16, and 16 are attached. In this embodiment, these elastic rings are provided between one roll main body 3a and the chock 5, 5, and between the other roll main body 4a and the chock 6, 6. The elastic rings 15, 15, 16, 16 are made of an elastic material such as rubber, and the upper and lower opposing parts come into elastic contact with each other, and their repulsive force pushes up the upper roll 3. It's summery.

This embodiment is constructed as described above, and includes an elastic ring 1
Since the upper roll 3 is pushed up by the upper rolls 5, 15, 16, and 16, the play in the bearings in the upper jocks 5, 5 can be reduced, and rolling accuracy can be improved.

Moreover, since the elastic rings 15, 15 and 16, 16 are provided between the roll main body 3a and the jocks 5, 5 and between the roll main body 4a and the jocks 6, 6, the roll 3, The elastic rings 15, 15, 16, 16 can prevent the rolling oil supplied to the chock 4 from flowing into the chock 5, 5, 6, 6 side.

Therefore, it is possible to prevent the grease filled in the bearings in the chokes 5, 5, 6, and 6 from being washed away by the rolling oil.

Moreover, since the upper roll 3 is pushed up by the repulsive force of each elastic ring 15, 15, 16, 16, the load on the bearing is reduced, and the lower roll 4 ( The rotational force of the drive roll) can be transmitted to the upper roll 3 (driven roll),
The rotation of the roll becomes very smooth.

Note that the present invention is not limited to a two-high rolling mill, but can be similarly applied to a three-high rolling mill or more.

[Effects of the Invention] According to the present invention, it is extremely effective in improving rolling accuracy, smoothing the rotation of the rolls, and maintaining proper lubrication of the chock inner bearing.Moreover, it is possible to add an elastic ring to an existing rolling mill. It has a simple structure and does not require major design changes or large-scale processing, so it is easy to implement and has great effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of a rolling mill, FIG. 2 is a side view, and FIG. 3 is a schematic diagram showing the arrangement of elastic rings. 2...Roll stand, 3,4...Roll,
5, 6...Chick, 15, 16...Elastic ring.

Claims (1)

[Claims] 1. Upper and lower rolling rolls rotatably supported on a roll stand by chock having bearings;
A means for supplying rolling oil to the rolls, and a means for supplying rolling oil to the rolls, which is made of an elastic material and is attached between each chock and the roll body of both rolls, and presses the upper roll by coming into elastic contact with each other. A rolling mill characterized in that it is equipped with an elastic ring that raises the chock and separates the roll body from the chock.