Chockless rolling mill

Details Chockless rolling mill Chockless rolling mill

1989-04-03

1990-11-13

Crane, Daniel C.

Metal deforming

By use of roller or roller-like tool-element

With carrier for roller-couple or tool-couple

72248, B21B 3118, B21B 3126

Patent

active

049693476

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to a chockless rolling mill, which dispenses with any roll chock.


DESCRIPTION OF THE RELATED ART

The usual rolling mill requires the draft adjustment and axial adjustment of rolls. Therefore, upper and lower rolls are supported via bearings in chocks provided in respective driving and operating side housings. The draft adjustment is done by vertically displacing the upper or lower roll with a draft screw mounted in the housing. The axial adjustment is done by displacing the upper or lower roll together with the chock thereof in the axial direction. In the usual rolling mill, however, the chocks supporting the upper and lower rolls are mounted in the housings. Therefore, the housings are large in size. In addition, since the vertical and axial displacement of the roll is effected via the chock, the construction is complicated, and also the maintenance involves a large number of steps.
Meanwhile, recent mass production steel rod and billet rolling equipment calls for compact and maintenance-free rolling mills, which are capable of high accuracy rolling under high pressure.
An object of the invention is to provide a rolling mill, which can meet the demand noted above and dispenses with any roll chock.


SUMMARY OF THE INVENTION

According to the invention, there is provided a chockless rolling mill, which comprises upper and lower eccentric sleeves with worm wheels rotatably provided as pair in respective drive side and operating side housings such that their axial movement is restricted and supporting necks of respective upper and lower rolls, worm shafts with respective upper and lower worms provided as a pair and in mesh with the worm wheels of the respective upper and lower eccentric sleeves for causing rotation thereof in opposite directions for draft adjustment and a rotating mechanism for rotating the worm shafts in the drive side and operating side in synchronism to each other.
The upper and lower eccentric sleeves with the respective worm wheels, which are rotatably provided in the respective drive side and operating side housings and support the necks of the upper and lower rolls via the bearings, are rotated in synchronism to each other via the worm mechanism to effect draft adjustment.
Thus, chocks, which dictate large housing size and a large number maintenance steps, are dispensed with to provide a compact and maintenance-free rolling mill. Further, rolling under high pressure and with high accuracy can be realized by causing displacement of the upper and lower rolls vertically symmetrically on the opposite sides of a path line, which is held constant.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an embodiment of the invention; and
FIG. 2 is a sectional view showing an eccentric sleeve and nearby arrangements.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Now, an embodiment of the invention will be described with reference to FIGS. 1 and 2.
In the rolling mill according to the invention, vertical draft adjustment mechanisms of upper and lower rolls 5U and 5B are symmetrically disposed in respective operating side and drive side housings 1a and 1b, so the description will only be made with respect to operating side housing 1a. Further, upper and lower roll draft adjustment mechanisms of operating side housing 1a are vertically symmetrical to one another, so the majority of the description will concern the upper roll draft adjustment mechanism.
Eccentric sleeve 2aU is rotatably mounted in operating side housing 1a such that its axial movement is restricted. A portion of eccentric sleeve 2aU extending from housing 1a has coaxial worm wheel 2c. Also, radial bearing 8aU is employed to support neck 5a of upper roll 5U.
Upper and lower eccentric sleeves 2aU and 2aB have respective worm wheels 2c in mesh with respective worms 3U and 3B provided on worm shaft 3a rotatably supported in housing 1a. When worm shaft 3a is rotated, upper and lower eccentric sleeves 2aU and 2aB are rotated in opposite directions from one anot

REFERENCES:
patent: 2774263 (1956-12-01), Leufven
patent: 4248074 (1981-02-01), Fuhrmann et al.
patent: 4581911 (1986-04-01), Shinomoto
patent: 4589269 (1986-05-01), Michaux

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