Universal rolling mill stand

Details Universal rolling mill stand Universal rolling mill stand

1993-02-19

2001-10-23

Hail, III, Joseph J. (Department: 3723)

Metal deforming

By use of roller or roller-like tool-element

Included in roller-cluster

C072S239000

Reexamination Certificate

active

06305205

ABSTRACT:

FIELD OF THE INVENTION
The present invention is generally directed to a rolling mill stand and more particularly to a universal rolling mill stand with two horizontal and vertical rolls adjustably supported in parallel roll pillars.
BACKGROUND OF THE INVENTION
Universal rolling mill stands, operating in continuous or reversing operation, can roll the most versatile sections, for instance, double T and U-beams or rails. The horizontal and vertical sets of rolls of these universal rolling mill stands are disposed with installation pieces in window recesses of the pillar or post beams. The installation pieces of the horizontal rolls abut in pairs against the upper and lower transverse girders, which are retained by thrust nuts by pairs of adjustment spindles disposed opposite each other on both sides of the rolling train to be axially undisplaceable, but rotatably supported. To avoid lifting the transverse yokes from the remaining rolling mill stand parts in order to replace the rolls, the upper transfer yoke is divided into two parts so that it can be swiveled-out and back after the roll has been replaced and can be clamp-locked with the remaining stand part. In the outwardly swiveled position, the installation pieces receiving the rolls are freely accessible and can be removed from the stand through the window recesses. In order to achieve the inward and outward swiveling, swiveling mechanisms are required in addition to the installation pieces which altogether enable a meaningful roll replacement. These swiveling mechanisms are, for instance, additional hydraulic swivel cylinders.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a universal rolling mill stand which does not require the use of installation parts.
Another object of the present invention to create a universal rolling mill stand which permits a simple construction and operation process.
These and other objects of the invention, which shall become hereafter apparent solved by the invention by locating horizontal rolls in bearings disposed in roll pillars or posts, without the use of installation parts. The roll post with the bearing which is located on the operator's side and facing away from the driving elements can be moved away in rolling axis direction of the horizontal rolls from the other roll post. The vertical rolls, supported in adapters, are slid into guide frames rigidly connected with the roll posts. The invention is based upon the fundamental consideration that a universal rolling mill stand, completely devoid of installation parts, can be realized by displacement of the roll posts on the operator side.
After displacement, the horizontal as well as the vertical rolls are exposed and are accessible from the inside of the pulled apart rolling mill stand. The installation pieces required for roll replacement, especially those of the vertical rolls, can be eliminated in the universal rolling mill stand of the invention since the guide frame rigidly connected to the roll posts or pillars fulfills all tasks otherwise performed by the installation piece of a vertical roll.
An adapter supporting the vertical roll can be directly brought into the installation position required for the rolling operation in the roll post or pillar by sliding into the guide frame. It is therefore no longer necessary to pass through an installation piece in a roundabout way. The guide frames therefore expediently comprise adapter recesses, accessible from the inside, through the roll posts, for instance, in the form slideways facilitating the pushing or sliding-in process.
In the invention, the guide frames are solidly connected to the roll posts or pillars through tie rods. It is indeed possible to fabricate the guide frames in a simple piece with the roll posts as a cast part. However, a multipart construction provides fabrication advantages which, in particular, permits an economical production of roll posts and guide frames by flame burners or autogenous cutting from a slab and results therefore in a simple steel design. The solid connection achievable through bracing by two or four tie rods is such that the guide frame position horizontally after its installation is able to carry the occurring rolling forces.
In the invention, the guide frames may be in two parts and comprise an adapter support part with a yoke or crosshead attached externally. When installing the guide frame, the crosshead and the adapter support or carrier part are fixed to the roll pillar or post by tie rods. The two-part construction of the guide frame affords the advantage of being able to dispose the vertical roll screw-down or adjustment system in the crossheads.
If the adapters are provided, their internally located sides facing the rolling gap with a spectacle-like mounting acted upon by the rolled material side guides located on the inlet and outlet ends, the adapter can also simultaneously be hydraulically pressed toward the rear against the adjustment system by the side guides, through the mounting (spectacle-like frame) and the system can thereby be balanced.
In a further refinement of the invention, horizontal rolls may be disposed in eccentric plates adjustable by worm gears. The horizontal rolls can be screwed down to the desired setting dimension by the worm gear which rotates the eccentrics
To operate the universal rolling mill stand as a continuous rolling stand in the present invention, which could also be made available as a looping or change stand, it is advisable to utilize a vertical roll screw-down system, comprising a wedge adjustment and shim stock loaded by this wedge adjustment against the adapter. The universal rolling mill stand, continuously operating, is thus provided with a one-time adjustment, for which purpose the shim stock is attached from the rear in the web region to the adapter. The shims compensate the dressing to size dimension of the vertical rolls and enables an adjustment of the rolling gap to sections of different widths. On the other hand, the wedge adjustment serves for the fine adjustment, for instance with an adjustment travel of +/−5 mm, so that the roll wear and spring-back of the universal rolling mill stand can be corrected.
The simple construction of the universal rolling mill stand can be assisted by performing all adjustments manually by, for instance, a ratchet placed on the adjustments wedge. However hydraulic or electrometers are also suitable for this task, particularly if the universal rolling mill stand operates in the reversing mode. In that case, a hydraulic cylinder could be inserted between the crosshead and the adapter, where the shim stop is disposed in the mechanical wedge adjustment. The entire crosshead could be adjustable against the adapter support part and thus the adapter, together with the vertical roll, in the form of, for instance, two adjustment spindles synchronized with each other and disposed in mechanically driven adjustment nuts.
If a U-shaped abutment part is expediently disposed between the adapters and the roll screw down or adjustment systems, a good support or abutment for the vertical roll forces can be achieved towards the rear, meaning at the side facing away from the rolling gap or in the rolling or pitch line, namely by web-shaped segment of the U-shaped abutment part, providing a good support or bearing fact. The adapter itself and the replacement part, which must be slid into or out of the guide frame, comprises a top and bottom plate, as well as a support axis with bearings for the vertical roll fastened in those plates.
The universal rolling mill stand of the invention can be operated with single piece horizontal rolls. If alternatively multipart horizontal rolls braced by a tie rod to form a single unit are however utilized, the simple and economical type of construction of the universal rolling mill stand in the invention can be further promoted, because in case of worn roll barrels, the roll ring instead of the entire horizontal roll can be replaced.


REFERENCES:
patent: 1865286 (1932-06-01), Soderberg e

Affiliated with

Also associated with

Rating

Universal rolling mill stand does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Universal rolling mill stand, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Universal rolling mill stand will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2585799