Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1995-09-12
1997-08-19
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
B21B 3102
Patent
active
056576609
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an arrangement for fastening a roll-unit carrier firmly to a roll stand, wherein the carrier can be displaced linearly into alignment with the roll stand.
BACKGROUND OF THE INVENTION
Modern roll stands are often constructed for quick exchange of the roll unit. In the case of one known construction of this kind, the roll unit is carried by a carrier or cassette which can be moved linearly in relation to the remainder of the roll stand with the aid of a mechanism mounted on the base structure that supports the stand, so as to enable the roll unit to be removed and replaced with a new roll unit. In order to enable this exchange to be made quickly, it must be possible to quickly release the carrier from and to quickly fasten the carrier to the remainder of the roll stand. High demands are placed on such fastening arrangements because of the large forces that are generated when rolling materials in a rolling mill, particularly in view of the fact that the force with which the carrier is fastened to the remainder of the roll stand must be so great that the carrier and that part of the unit to which it is coupled will function as a homogenous unit in the operation of the rolling mill. Fastening forces in the region of about 1000 kN are required in meeting this demand.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a fastener arrangement of the aforesaid kind which will produce the requisite fastening force and which is also very reliable in operation.
This object is achieved in accordance with the invention with an arrangement of the kind defined in the introduction which is characterized in that the roll stand includes a fastener device which is journalled eccentrically in a rotatable cylindrical member and which has an end which includes a fastening surface which in the fastening position of said fastener device coacts with a complementary surface on the carrier, and in that means are provided for rotating the cylindrical member between a fastening position in which the carrier is pressed against the roll stand with a predetermined force, and a release position in which the carrier can be moved towards or away from the roll stand without being impeded by the fastener device. The use of an eccentrically journalled fastener device enables very powerful fastening forces to be obtained with a relatively limited power input for generating and maintaining the fastening or securing force.
According to one preferred embodiment of the fastener arrangement, the fastener device is journalled for axial movement in the cylindrical member, between an inserted position in which the carrier is able to move linearly into abutment with the roll stand, and an extended position in which movement of the carrier is prevented. The arrangement also includes means for preventing rotation of the fastener device, and the cylindrical member includes a pin which runs in a channel in the fastener device and controls axial movement of said fastener device in relation to the cylindrical member.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of an inventive fastener arrangement will now be described in more detail with reference to the accompanying drawings, in which
FIG. 1 is a side view of a roll stand and shows the various stand components in an unassembled state;
FIG. 2 is a sectional view of the pinion stand housing taken on the line II--II in FIG. 1;
FIG. 3 illustrates part Of FIG. 2 in larger scale and shows one embodiment of an inventive fastener arrangement;
FIG. 4 illustrates a fastener device included in the fastener arrangement of FIG. 3;
FIGS. 5A-5D are schematic vertical sectional views of the fastener arrangement illustrated in FIG. 3 and show different stages of fastener manoeuvering; and
FIG. 6 illustrates the fastener arrangement of FIGS. 3-5 from above.
DETAILED DESCRIPTION OF THE INVENTION
The roll stand illustrated in FIG. 1 comprises a roll unit 1, a cassette 2, a pinion stand 3, and a drive unit 4. The roll unit 1 is
REFERENCES:
patent: 4314469 (1982-02-01), Kitamura et al.
patent: 5050415 (1991-09-01), Albers et al.
Larson Lowell A.
Morgardshammar AB
Schoeffler Thomas C.
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