Cross-rolling mill

Abstract

The invention relates to a cross-rolling mill, having a plurality of roll shafts (1), each applying a radially directed rolling force to a workpiece, wherein orientation of a roll axis (w) of at least one of the roll shafts (1) adjustably changes about a first adjustment axis (S1) and a second adjustment axis (S2), wherein an intermediate member (9, 10) is arranged between a rotary baring (4, 5) and a control element (11, 12), and wherein the intermediate member (9, 10) includes a rolling force-transmitting rocker pin (14, 15) having a spherical surface (14a, 14b, 15a, 15b) that provides for pivotal movement in a plurality of directions.

Claims

1. A cross-rolling mill, comprising: a plurality of roll shafts (1), each having a rotary bearing and applying a radially directed rolling force to a workpiece, wherein an orientation of a roll axis (w) of at least one of the roll shafts (1) is adjustable about a first adjustment axis (S1) and a second adjustment axis (S2); and an intermediate member (9, 10) arranged between the rotary bearing (4, 5) of at least one of the roll shafts and a control element (11, 12), said at least one intermediate member (9, 10) comprising a rolling force-transmitting rocker pin (14, 15) having a spherical surface (14 a, 14 b, 15 a, 15 b), said rocker pin supported via the spherical surface for pivotal movement of the rocker pin in a plurality of directions relative to the one of the roll shafts.

2. The cross-rolling mill according to claim 1, further comprising at least one said rocker pin and at least one said rotary bearing arranged at respective opposite ends of each of said roll shafts.

3. The cross-rolling mill according to claim 1, characterized in that each of the roll shafts (1) is received in a roll housing (6), said roll housing (6) movably supported about adjustment axes (S1, S2), said rocker pin (14, 15) supported against the roll housing (6) of the one of the roll shafts.

4. The cross-rolling mill according to claim 3, further comprising a tension member (13), which applies a force to the roll housing (6) in a direction opposite a direction of the rolling force.

5. The cross-rolling mill according to claim 1, characterized in that the rocker pin (14, 15) engages at least at one end thereof, a bearing cap pivotable relative to the rocker pin.

6. The cross-rolling mill according to claim 1, characterized in that the rocker pin (14, 15), starting from a neutral position, is pivotable about a rotational point by an angle in each spatial direction.

7. The cross-rolling mill according to claim 1, characterized in that at least two of the roll shafts (1) are adjustable about the first adjustment axis (S1) and a second adjustment axis.

8. The cross-rolling mill according to claim 7, wherein at least three of the roll shafts are adjustable about the first adjustment axis (S1) and a second adjustment axis.

9. The cross-rolling mill according to claim 7, wherein all of the roll shafts are adjustable about the first adjustment axis (S1) and a second adjustment axis.

10. The cross-rolling mill according to claim 4, wherein the tension member is a hydraulic tension member.

Description

(1) Below, a preferred embodiment of the invention will be described in detail with reference to the accompanying drawings.

(2) FIG. 1 shows a partially cross-sectional view of an inventive cross-rolling mill;

(3) FIG. 2 shows a schematic cross-sectional view of a pivotable control element along the cross-sectional line A-A in FIG. 3; and

(4) FIG. 3 shows a plan view of the control element shown in FIG. 2 in four outmost pivotal positions.

(5) The inventive cross-rolling mill which is shown in FIG. 1, has three structurally identically supported roll shaft 1 of which only one is shown in the drawing. The roll shaft 1 has a roll body 2 extending radially with respect to the roll axis W or in a direction of action of a rolling force on a workpiece. The roll shaft 1 is rotated by a gimbal-mounted drive shaft 3 about the roll axis W.

(6) In front of and behind the roll body 2, there are provided, respectively, rotary bearings 4, 5 which act against the rolling forces. The rotary bearings 4, 5 are received in a roll housing 6, with the roll housing 6 being displaceably supported relative to the frame 8 of the cross-rolling will by a bearing support 7. The roll housing is adjustably pivotable about first and second adjustment a first adjustment axis S1 and a second adjustment axis S2. The second adjustment axis S2 extends, as shown in FIG. 1, perpendicular to the drawing plane. The adjustment axes S1 and S2 extend perpendicular to each other, though they do not necessarily have to intersect each other.

(7) The roll housing 6 is formed as a rigid essentially yoke-shaped member. The roll housing 6 is supported at its two support regions 6a, on one hand, by the rotary bearings 4, 5 and, on another hand, by respective intermediate members 9, 10. The intermediate members are arranged between the roll housing 6 or the rotary bearings 4, 5, on one hand, and, on the other hand, two respective control elements 11, 12, on another hand.

(8) The roll shaft 1 is adjusted by alignment of the roll housing 6 and, thus, of the rotary bearings 4, 5, at that, the control elements 11, 12, which are formed as hydraulic cylinders, should be respectively positioned. The control elements 11, 12 can transmit rolling forces acting on a workpiece.

(9) The roll housing 6 is pulled against the rolling force by a tension member 13 formed as a hydraulic cylinder, so that the roll housing 6 is always firmly pressed against the control elements. The force applied by the tension member is smaller than the force of the control elements, which insures a play-free positioning of the roll shaft 1 and provides for release of the workpiece.

(10) The intermediate members 9, 10 are identical and serve for compensation of adjustment-generated tilting and offset movements between the control elements 11, 12, on one hand, and the roll housing 6 or the roll shaft 1, on the other hand. The intermediate members 9, 10 include, respectively, rocker pins 14, 15. The rocker pins 14, 15 are pivotable in several directions which is achieved by spherical support of the rocker pins 14, 15.

(11) The rocker pins are provided, on their sides, facing the control elements, with a respective concave surface 14a, 15a, whereas the control elements are provided with corresponding convex spherical surfaces. On their sides facing the roll shaft, the rocker pins are likewise provided with concave spherical surfaces 14b, 15b.

(12) At the ends of the rocker pins 14, 15, there are provided substantially semi-spherical bearing caps 16, 17. Those are pivotable by the spherical surfaces 14b, 15b relative to the rocker pins, with their plane opposite surfaces lying on the roll housing. Thereby, if necessary, a lateral offset of the opposite surfaces relative to the roll housing becomes possible.

(13) It should be understood that in other embodiments reversely curved spherical surfaces can be provided, e.g., convex spherical surfaces on the rocker pins 14, 15 and correspondingly concave spherical surfaces on the control elements 11, 12 and/or the bearing caps 16, 17.

(14) The adjustment of the roll housing about the adjustment axis S1 extending perpendicular to the drawing plane of FIG. 1 is effected by adjustment devices, not shown, which act perpendicular to the drawing direction and, thus, not in the direction of action of the rolling force. Generally, the rocker pins 14, 15 are pivotable, starting from a neutral position, in each spatial direction by a smallest angle about a rotation point. The rotational points lie in the geometrical center of the rocker pin side of the spherical surface.

(15) FIG. 3 in which one of the rocker pins 14, 15 is shown, illustrates pivotal movements of the rocker pin by an angle in four different exemplary spatial directions up to a stop. The pivotal movement provide for a maximal lateral offset d of the opposite surfaces of the bearing caps 16, 17.

LIST OF REFERENCE NUMERALS

(16) 1 Roll shaft 2 Roll body 3 Drive shaft, universal joint 4 First rotary bearing 5 Second rotary bearing 6 Roll housing 6a Support areas of the roll housing 7 Roll housing support 8 Frame 9 First intermediate member 10 Second intermediate member 11 First control element 12 Second control element 13 Tension member 14 First rocker pin 14a Concave spherical surface 14b Concave spherical surface 15 Second rocker pin 15a Concave spherical surface 15b Concave spherical surface 16 First bearing cap 17 Second bearing cap W Roll axis S1 First adjustment axis S2 Second adjustment axis d Lateral offset