Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1995-09-12
1997-07-22
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
B21B 3500
Patent
active
056494416
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a drive arrangement for roll-pairs with which the roll shafts are driven synchronously.
Present day roll-pair units included a rolling line of a rolling mill are comprised of separate parts which are connected to a supportive base structure and mutually coupled together to form a functional unit with the aid of coupling devices, which at times have the form of quick-fasteners which enable components to be separated quickly from one another to facilitate the exchange of mill components and maintenance. The drawback with this arrangement resides in the number of working procedures that must be carried out when changing a component, for instance when changing rolls. Another drawback resides in the amount of work that is required in installing and trimming such a roll-pair unit so that it can be integrated in the rolling line. These drawbacks are occasioned, among other things, by the fact that the roll-pair drive arrangement is often heavy, bulky and is comprised of many components. Some of these components will be different when the roll-pair unit is to be driven with the roll-pair shafts in a horizontal position instead of a vertical position. Furthermore, when switching from one rolled product to another rolled product, it is often sufficient to replace a roll-pair unit fitted with horizontal rolls in a rolling line with a similar roll-pair unit that is fitted with vertical rolls, and vice versa. There is therefore a need to construct the roll-pair units so that the rolls can be fitted both horizontally and vertically without needing to change the drive arrangement.
The object of the present invention is to eliminate the aforesaid drawbacks and to satisfy the aforesaid requirements.
According to the invention, this object is achieved with a drive arrangement of the kind defined in the introduction which is characterized in that it includes an alternating current motor and a planetary gear mechanism. This construction provides a lighter and more compact drive arrangement than drive arrangements that are constructed in accordance with the known techniques, and enables the drive arrangement to be constructed as a single manageable unit which can be placed both horizontally and vertically without needing to be changed.
According to one preferred embodiment of the invention, the alternating current motor is mounted on one side of the planetary gear mechanism and relative to the roll-pair on the same side of the planetary gear mechanism as a plane which passes through the ends of the output shaft of the alternating current motor and the input shaft of the planetary gear mechanism. The output shaft of the alternating current motor and the input shaft of the planetary gear mechanism are mutually connected by means of a transmission, preferably in the form of a gear transmission. The drive arrangement also includes a pinion stand and is constructed to form a single assembly unit which carries the roll unit containing the roll-pair.
The invention will now be described in more detail with reference to a preferred embodiment of the invention and also with reference to the accompanying drawings, in which
FIG. 1 is a side view of a roll-pair unit provided with a drive arrangement according to one embodiment of the invention;
FIG. 2 shows the roll-pair unit in FIG. 1 from above;
FIG. 3 is a sectional view of the roll-pair unit shown in FIG. 1 with the unit in a dismantled state;
FIGS. 4 and 5 are respective vertical and horizontal sectional views of a roll-pair unit according to FIG. 1 in which the rolls are arranged horizontally;
FIG. 6 is a vertical sectional view of a roll-pair unit according to FIG. 1 with the rolls arranged vertically; and
FIGS. 7 and 8 are respective sectional views of a convertible supported roll-pair unit according to FIG. 1 with the rolls in a horizontal and a vertical position respectively.
The illustrated exemplifying embodiment of a roll-pair unit includes a roll unit 1, a cassette 2, a pinion stand 3 and a drive unit 4. The roll unit 1 is carried by the casse
REFERENCES:
patent: 3945234 (1976-03-01), Steinbock
patent: 4882923 (1989-11-01), Ichida et al.
patent: 5127251 (1992-07-01), Casegrande et al.
Danielsson Lennart
Granholm Borje
Leksen Folke
Tingvall Lars
Larson Lowell A.
Morgardshammar AB
Schoeffler Thomas C.
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