Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1988-03-15
1990-02-27
Bray, W. Donald
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
72205, 475332, 475343, B21B 3500
Patent
active
049035185
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a roll driving apparatus for a rolling mill in which a metal material is continuously rolled by working rolls, and more particularly to a roll driving apparatus adapted to drive a pair of working rolls by means of driving forces from an identical motor.
2. Background Art
Regarding the working rolls of a rolling mill, an arrangement has heretofore been such that the output shaft of a single motor is connected to a speed reducer, that the output shaft of the speed reducer is furnished with distributing gears called a "cam roller," so as to distribute power to two shafts, and that the working rolls are connected to the two shafts. A driving mechanism which adopts such an arrangement is disclosed in, for example, the specification of U.S. Pat. No. 3495467.
This prior-art apparatus for driving the working rolls requires the cam roller to endure a great torque in order that a torque intensified by the speed reducer may be distributed to the two shafts. The cam roller is composed of the two gears, the intermeshing parts of which transmit the torque. That is, since the torque is transmitted by the meshing of one pair of gears, these gears need to be large in order to transmit the intensified torque mentioned above. In this manner, in the case where the torque is intensified by the speed reducer and is thereafter distributed to the two shafts by the cam roller, there is the disadvantage that the cam roller becomes a large-scale equipment. Especially in recent plate rolling, the cam roller has tended to become large in size for the reason that the power of the motor reaches 10,000 kW and that the driving torque of each of the working rolls needs to be as great as 100 tons-m.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a driving apparatus which can reduce the size of the installation of the whole driving system for driving a pair of working rolls by means of power from a single motor.
The present invention is characterized in that an output torque from a single motor is first distributed to two shafts by a cam roller, that torques are thereafter intensified by planetary reduction gears disposed on the respective shafts, and that the intensified torques are respectively transmitted to working rolls.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fundamental arrangement view of a working roll-driving apparatus which is an embodiment of the present invention,
FIG. 2 is a half-sectional view of planetary reduction gears,
FIG. 3 is a view showing the meshing situation of gears in the reduction gears of FIG. 2, and
FIG. 4 is a fundamental arrangement view showing another embodiment of the present invention.
BEST MODES FOR CARRYING OUT THE INVENTION
The first embodiment of the present invention is shown in FIG. 1. It is an example in the case of a quadruple rolling mill which is the most common. The rolling mill has an outer frame formed in such a manner that right and left stands 45, 47 are connected by joint beams 46, 49. Contained in the outer frame are four reincforcing rolls 22, 18 which are journaled in bearing boxes 42, 48, and also two working rolls 73, 74 which extend a material to-be-rolled 24 and which are journaled in bearing boxes 41, 80. A hydraulic cylinder 43 and a pressure block 44 for controlling the plate thickness of the material to-be-rolled 34 are mounted on the top part of each bearing box 42 for the reinforcing roll 42. The working rolls 73, 74 of such a rolling mill are driven as stated below.
The power of a single motor 62 is transmitted through a coupling 61 to a cam roller 70 which distributes this power to two shafts. The cam roller 70 is so configured that two gears 71, 72 are included in a casing 70a.
As regards the shaft on the upper side, the power distributed to the two shafts by the cam roller 70 is transmitted through a coupling 54 to a speed reducer 53 for intensifying a torque. The power regarding the lower shaft is similarly guided through a coupling 59 to a speed reducer 60. The t
REFERENCES:
patent: 2513285 (1950-07-01), Coe
patent: 3495467 (1970-02-01), Herbay et al.
patent: 3777533 (1973-12-01), Munchbach
patent: 3981171 (1976-09-01), Kmelisch
patent: 4103565 (1978-08-01), Matikainen et al.
patent: 4194382 (1980-03-01), Kajiwara
patent: 4365496 (1982-12-01), Shiozaki et al.
Kimura Tomoaki
Sekiya Teruo
Bray W. Donald
Hitachi , Ltd.
Katz Steve
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