JPS5832002B2 - rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill, and more particularly to a rolling mill having a reduction screw that is installed horizontally and moves in the axial direction with rotation.

Conventionally, it has been required to install a bearing at the tip of a reduction screw that is installed horizontally and moves with rotation, but the horizontal screw does not hold the bearing, so there was no other option than to fix it.

However, if the bearing is fixed, there are drawbacks such as difficulty in centering the screw if the chock or carrier bar is tilted due to roll bending or the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and provide a rolling mill that is easy to machine, assemble, and maintain.

The present invention is configured so that there is no position restriction between the reduction screw, the metal chock, and the carrier bar.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 8.

1 to 8 show an embodiment of the present invention.

In the figure, 31 is a roll, and this roll 31 is attached to a metal chock 32, and is configured to be moved by a caliper cover 37 via a pin 36 by a balance cylinder 35 attached to a lowering screw 33 and a housing 34. has been done.

The reduction screw 33 is configured to be rotated by the rotational force of a motor and a worm (not shown) being transmitted via a worm wheel 38 and a key 39.

Further, the reduction screw 33 is configured to move in the left and right direction while rotating by means of a female reduction screw 40 attached to the housing 34.

The worm wheel 38 is supported by a casing 41 and metal 42 attached to the housing 34.

Metal chock 32, carrier bar 37 and guide 4
3 rides on the upper part of the housing 34 and slides independently in the axial direction of the reduction screw 33, and the side surfaces are similarly guided by the housing 34.

A bearing box 45 that houses the rolling repair ring 44 is inserted into the guide 43, and its cross section is square as shown in FIG. It is composed of

The rolling bearing 44 includes a fixed ring 46, rollers 47, and a rotating ring 48, and the rotating ring 48 includes a nut 49 and a spring 50 attached to the bearing box 45.
and the reduction screw 33 supported by the rod 51
The structure is such that eccentric movement can occur when the rotation centers of the roller bearing 44 and the roller bearing 44 are misaligned.

Furthermore, when the rolling screw 33 and the metal chock 32 are in indirect contact, the presser block 52 that is in contact with the rotating ring 48 is in contact with a concave and convex spherical surface, and when the roll 31 is bent by the rolling load, it will not roll. This prevents unbalanced loads from occurring on the bearings.

Furthermore, when the metal chock 32 and the lowering screw 33 are separated when the rolls are changed, etc., a spring 53 and a rod 54 attached to the presser block 52 prevent the rotating
8 is held down so that the roller 47 does not fall.

The bearing box 45 and the plate 55 attached to the metal chock 32 have end faces that are not constrained in position vertically and horizontally (in the rolling material path direction).

Note that one side of the presser block 52 is in contact with the reduction screw 33, and although these contact surfaces are both flat in the drawings, they may be a combination of concave and convex spherical surfaces.

This is because the vertical and horizontal positional restraints of the reduction screw 33 and the guide 43 are eliminated by the rollers 47 of the rolling bearing 44 and the fixed ring 46.

A presser cover 56 is bolted to the bearing box 45, and comes into contact with the presser block 52 when the screw 33 and metal chock 32 are separated due to roll replacement or the like.

As shown in FIG. 7, a spring 57 and a rod 58 are installed in the guide 43, and when the lowering screw 33 and the metal chock 32 move in the axial direction while indirectly contacting the metal chock 32, the metal chock 32 and the carrier par 37, the rod 58 pushes the carrier par 37, and the guide 4
3 comes into contact with the presser cover 56, so that the lowering screw 33, the metal chock 32, the carrier par 37, and the guide 43 are interlocked.

In addition, when moving the rolls 31 to the reclassification position using only the balance cylinder 35 during roll reclassification, the carrier par 3
The contact surface between 7 and the metal chock 32 changes from the mouth surface to the A surface, and only the carrier par 37 moves.

In this case, the carrier par 37 tilts due to the relationship between the position of the balance cylinder 35 that pushes the carrier par 37 and the frictional force of the sliding surface, so to prevent this, the guide 43
A spring 57 and a rod 58 installed in this structure are configured to help.

According to the present invention described above, the following effects are achieved.

1) When replacing the rolls, using a reduction screw and a balance cylinder takes a lot of time and requires separating the mechanical tie of the reduction drive shaft, which is difficult, but with the present invention, it is easy because it is done only with the balance cylinder. And it can be done quickly.

2) Machining, assembly, and maintenance are easy because there is no positional restriction between the reduction screw, guide, and metal chock.

3) Since there is no uneven load on the rolling bearing, a small capacity can be used.

[Brief explanation of the drawing]

Figures 1 to 8 show one embodiment of the present invention.
The figure is a partial sectional view, Figure 2 is a sectional view taken along the line A-A in Figure 1,
Figure 3 is a BB line arrow diagram in Figure 1, Figure 4 is an enlarged cross-sectional view of the rolling bearing part, Figure 5 is an explanatory diagram when changing the rolls, and Figure 6 is C in Figure 4. -C line sectional view, FIG. 7 is an enlarged sectional view of the main part of FIG. 3, and FIG. 8 is an enlarged sectional view of the rolling bearing portion. 33... Lowering screw, 44... Rolling bearing, 52... Presser flock.

Claims (1)

[Claims] 1. In a rolling mill that has a reduction screw that is installed horizontally and moves in the axial direction with rotation, a rolling bearing that is rotated by the reduction screw and that can adjust the deviation from the center of rotation of the reduction screw is installed between the carrier bar and the housing. A presser block is installed on the guide provided between the screws and the rolling bearing, and is interposed between the reduction screw and the rolling bearing to urge the rolling bearing, and the contact surface between the presser block and the rolling bearing is A rolling mill characterized by being formed into a convex and concave spherical shape.