Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1988-11-17
1990-12-04
Crane, Daniel C.
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
B21B 3108
Patent
active
049744380
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a housing structure for a rolling mill stand and to a method of changing the rolls of such a rolling mill stand.
An object of the present invention is to provide a housing structure for a rolling mill stand which enables the pair of horizontal mill rolls and optionally a pair of vertical rolls to be readily replaced with a minimum of time delay.
According to a first aspect of the present invention, a housing structure for a rolling mill stand comprises two mill housings arranged in spaced apart side-by-side relation, said housings providing support for a pair of horizontal rolls and optionally a pair of vertical rolls, each housing being mounted for displacement in the direction towards and away from the other housing, a spacer structure capable of supporting all the rolls and means for removably securing the housings together with the spacer structure clamped between them.
In use, the rolls, whether the pair of horizontal rolls or the pair of horizontal rolls and a pair of vertical rolls, are supported in the two mill housings and are rotated in the normal manner. The workpiece is passed through the spacer structure into engagement with the rolls.
The housings are conveniently secured together with pre-stressed bolts and, by disconnecting the nuts from the bolts, the housings can be separated from the spacer structure. Conveniently each mill housing has wheels on which the housing is supported on horizontal rails.
According to a second aspect of the present invention, in a method of changing the rolls of a rolling mill stand, the rolls are supported on a spacer structure clamped between a pair of spaced apart side-by-side mill housings, the clamping means are removed to separate the spacer structure from the housings, the housings are displaced in opposite directions from the spacer structure, the spacer structure with the rolls is removed from between the housings and replaced with a spacer structure with replacement rolls and the housings are secured together with the spacer structure clamped between them.
The mill housings may each comprise a vertically disposed closed frame defining a window for receiving the bearing chock assemblies of the horizontal rolls and with a horizontal `U`-shaped yoke projecting from the side of the frame which is away from the other housing.
A spacer structure carrying the replacement rolls and guides for guiding the workpiece is prepared and, after the spacer structure carrying the rolls to be replaced has been removed from between the mill housings, the previously prepared spacer structure with the rolls and guides is positioned between the mill housings and the housings are secured together with the spacer structure clamped between them. The bearing chock assemblies on the horizontal rolls are positioned in the windows defined by the mill housings and the drive spindles are connected to the ends of the horizontal rolls. Thus, the time taken for roll changing is reduced to a minimum.
In order that the invention may be more readily understood, it will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 is a side elevation of a rolling mill stand in accordance with the present invention;
FIG. 2 is a side elevation of the stand shown in FIG. 1 with the housing separated for roll changing; and
FIG. 3 is a section on the line B--B of FIG. 2.
A universal rolling mill stand which supports a pair of horizontal rolls and which can also optionally support a pair of vertical rolls is shown in the figures. The rolling mill stand can readily be converted from one which is used as a universal mill stand to one which supports only the horizontal rolls.
A pair of mill housings 1, 3 are arranged in spaced apart side-by-side relation. Each housing comprises a vertically disposed closed frame 5 which defines a conventional housing window. A pair of horizontally disposed frames 7 are secured individually to each of the vertical frames 5 on the side thereof which is away from the other frame. Each horizontal frame h
REFERENCES:
patent: 1628175 (1927-05-01), Moller
patent: 3712102 (1973-01-01), Eibe
patent: 4552007 (1985-11-01), Mantovan
patent: 4753097 (1988-06-01), Buchheit
Crane Daniel C.
Davy McKee (Sheffield) Limited
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