ROLLING MACHINE

Description

TECHNICAL FIELD

The present disclosure relates to a rolling machine.

BACKGROUND ART

A rolling machine for rolling a material to be rolled is known. For example, a rolling machine disclosed in PTL 1 joins a preceding material and a trailing material, which are each in a strip shape and are different in width, by a roll shift function, and performs continuous rolling by changing a roll shift position from a preceding material steady position to a trailing material steady position near a joining point of the materials.

CITATION LIST

Patent Literature

PTL 1: Unexamined Japanese Patent Publication No. H10-263651

SUMMARY OF THE INVENTION

A rolling machine of this type includes a work roll that comes into contact with a material to be rolled, and a backup roll that supports the work roll.

When the work roll is inclined for some reason in the rolling machine of this type, the inclination of the work roll is transferred to the material to be rolled, thereby causing a meandering phenomenon in which the material to be rolled is rolled while being inclined. The meandering of the material to be rolled is not preferable in terms of quality.

In particular, when the rolling machine has a roll shift function as in PTL 1, distribution of support force acting on the work roll from the backup roll changes. Thus, a support position on the work roll using the backup roll is displaced from the center of the work roll, and then the work roll is likely to incline.

Even when the rolling machine does not have the roll shift function, the work roll may be surely inclined.

The present disclosure has been made in view of such a point, and an object thereof is to suppress inclination of a work roll in a rolling machine.

A rolling machine according to the present disclosure includes a work roll that extends in a first direction and contacts with a material to be rolled, a backup roll that extends in the first direction and supports the work roll, a housing that accommodates the work roll and the backup roll and supports the work roll, a beam member that extends in the first direction around the work roll, a displacement sensor provided on the beam member, and a beam support member that supports the beam member. The displacement sensor measures displacement of the work roll in a second direction in which the work roll and the material to be rolled face each other, the second direction intersecting the first direction, and the beam support member and the housing are independent of each other.

The present disclosure enables suppressing inclination of a work roll in a rolling machine.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a rolling machine according to a first exemplary embodiment.

FIG. 2 is a front sectional view of the rolling machine according to the first exemplary embodiment taken along line II-II.

FIG. 3 is a plan view of the rolling machine according to the first exemplary embodiment as viewed in a direction of arrow III.

FIG. 4 is a front view of a positional relationship between a work roll and a backup roll according to the first exemplary embodiment as viewed in a direction of arrow IV.

FIG. 5 is a side view of a backup roll chock according to the first exemplary embodiment.

FIG. 6 is a side view of a work roll chock according to the first exemplary embodiment.

FIG. 7 is a side view of a bending plate according to the first exemplary embodiment.

FIG. 8 is a side view illustrating a positional relationship among a beam member, the work roll, and the backup roll according to the first exemplary embodiment as viewed in a direction of arrow VIII.

FIG. 9 is a schematic view of an inclination actuator according to the first exemplary embodiment.

FIG. 10 illustrates inclination of the work roll according to the first exemplary embodiment.

FIG. 11 is a diagram corresponding to FIG. 2 and according to a second exemplary embodiment.

FIG. 12 is a diagram corresponding to FIG. 5 and according to the second exemplary embodiment.

DESCRIPTION OF EMBODIMENT

Exemplary embodiments of the present disclosure will be described below in detail with reference to the drawings. The description below of preferred exemplary embodiments is merely illustrative in nature and does not intend to limit the present disclosure, applications thereof, or uses thereof at all.

First Exemplary Embodiment

(Rolling Machine)

Rolling machine 1 according to a first exemplary embodiment will be described. FIG. 1 is a perspective view of a rolling machine 1. FIG. 2 is a front sectional view of rolling machine 1 taken along line II-II. FIG. 3 is a plan view of rolling machine 1 as viewed in a direction of arrow III.

FIG. 1 indicates an X direction that is referred to as a front-back direction as a third direction, a Y direction that is referred to as a left-right direction as a first direction, and a Z direction that is referred to as a up-down direction as a second direction. In the up-down direction, an upper side in FIG. 2 is simply referred to as an upper side, and a lower side in FIG. 2 is simply referred to as a lower side. In the left-right direction, a left side in FIG. 2 is simply referred to as a left side, and a right side in FIG. 2 is simply referred to as a right side. In the front-back direction, a lower side in FIG. 3 is referred to as a front side, and an upper side in FIG. 3 is referred to as a back side. The front-back direction (third direction), the left-right direction (first direction), and the up-down direction (second direction) intersect each other (orthogonal in this example).

A side close to material K to be rolled described later in the front-back direction is referred to as an inner side (inside) in the front-back direction, and a side opposite to material K to be rolled in the front-back direction is referred to as an outer side (outside) in the front-back direction. A side close to barrel 11 in an axial direction of work roll 10 described later in the left-right direction is referred to as an inner side (inside) in the left-right direction, and a side close to shaft part 12 in the axial direction of work roll 10 in the left-right direction is referred to as an outer side (outside) in the left-right direction. A side close to material K to be rolled described later in the up-down direction is referred to as an inner side (inside) in the up-down direction, and a side opposite to material K to be rolled in the up-down direction is referred to as an outer side (outside) in the up-down direction.

Rolling machine 1 rolls material K to be rolled. Material K to be rolled is made of metal, resin, or powder, for example. In this example, material K to be rolled has a plate shape. Material K to be rolled is conveyed from the back side to the front side in the front-back direction by a conveying mechanism, and passes through rolling machine 1 on the way.

As illustrated in FIGS. 1 to 3, rolling machine 1 includes work roll 10, backup roll 20, housing 30, pressure actuator 50, bending actuator 55, beam member 60, displacement sensor 70, vibration sensor 75, flatness sensor 78, beam support member 80, and inclination actuator 90.

(Work Roll)

As illustrated in FIGS. 1 to 3, a pair (two) of work rolls 10 is provided. Work rolls 10 each have a cylindrical shape. Work rolls 10 each have an axial direction (axis) extending in the left-right direction (first direction). Work rolls 10 are disposed side by side in the up-down direction. Work rolls 10 each include barrel 11 and two shaft parts 12.

Barrel 11 constitutes an intermediate part in the axial direction of work roll 10. Shaft parts 12 constitute respective end parts in the axial direction of work roll 10. Barrel 11 has a larger outer diameter than shaft part 12. A gap, through which material K to be rolled passes, is opened between outer peripheral surfaces of barrels 11 of work rolls 10.

Work roll 10 and material K to be rolled face each other in the up-down direction (second direction). As described above, the up-down direction (second direction) intersects (specifically, is orthogonal to) the left-right direction (first direction) and the front-back direction (third direction). Barrel 11 of work roll 10 comes into contact with material K to be rolled in the up-down direction. The pair of work rolls 10 sandwiches material K to be rolled in the up-down direction and pressurizes material K to be rolled in the up-down direction.

(Backup Roll)

As illustrated in FIGS. 1 to 3, two pairs (four) of backup rolls 20 are provided. Backup rolls 20 each have an axial direction (axis) extending in the left-right direction (first direction). Backup rolls 20 are disposed above and below work roll 10. Backup rolls 20 are each disposed outside work roll 10 in the up-down direction (on the side opposite to material K to be rolled).

Backup rolls 20 each include barrel 21 and two shaft parts 22. Barrel 21 constitutes an intermediate part in the axial direction of backup roll 20. Shaft parts 22 constitute respective end parts in the axial direction of backup roll 20. Barrel 21 has a larger outer diameter than shaft part 22. Barrel 21 of backup roll 20 is in contact with barrel 11 of work roll 10. Barrel 21 of backup roll 20 supports barrel 11 of work roll 10. Barrel 21 of backup roll 20 presses barrel 11 of work roll 10 inward in the up-down direction (toward material K to be rolled).

FIG. 4 is a front view of a positional relationship between work roll 10 and backup roll 20 as viewed in a direction of arrow IV. As illustrated in FIG. 4, tapered part 21a is formed in barrel 21 of backup roll 20. Tapered part 21a is provided at any one of end parts of barrel 21 in the axial direction (left-right direction). Backup roll 20 on the upper side includes tapered part 21a provided at the right end part of barrel 21 in the axial direction (left-right direction). Backup roll 20 on the lower side includes tapered part 21a provided at the left end part of barrel 21 in the axial direction (left-right direction). Tapered part 21a has an outer diameter decreasing toward the end part in the axial direction.

Rolling machine 1 has a roll shift function. Backup roll 20 is movable (shiftable) in the axial direction (the left-right direction, the first direction) with respect to the work roll 10 by driving of a roll shift actuator (not illustrated). The roll shift function changes distribution of support force acting on work roll 10 from backup roll 20. Consequently, distribution of pressurizing force acting on material K to be rolled from work roll 10 is changed, and flatness of material K to be rolled is finely adjusted.

The flatness of material K to be rolled is measured by flatness sensor 78 (see FIGS. 1 and 3). Flatness sensor 78 is disposed on the front side of work roll 10. Flatness sensor 78 is a known optical sensor, for example. Flatness sensor 78 measures the flatness of material K to be rolled after being rolled by work roll 10.

FIG. 3 illustrates backup roll 20 on the upper side. Backup rolls 20 on the upper side include first backup roll 20a and second backup roll 20b. First backup roll 20a and second backup roll 20b are adjacent to each other in the front-back direction (third direction). As described above, the front-back direction (third direction) intersects (specifically, is orthogonal to) the left-right direction (first direction) and the up-down direction (second direction).

In the front-back direction, a gap is opened between first backup roll 20a and second backup roll 20b. Backup roll 20 (first backup roll 20a and second backup roll 20b) is not disposed directly behind work roll 10 (a side directly opposite to, directly above, or directly below material K to be rolled in the up-down direction (second direction) across work roll 10), but is disposed while being shifted by 45° in the front-back direction from directly behind work roll 10 (see FIG. 8), for example. Backup roll 20 on the lower side is similar to backup roll 20 on the upper side.

(Housing)

As illustrated in FIGS. 1 to 3, housing 30 accommodates work roll 10 and backup roll 20. Housing 30 supports work roll 10 and backup roll 20.

Housing 30 includes housing-side sole plate 31, upper plate 32, post 33, backup roll chock 34, self-aligning bearing 35, backup roll support bearing 36, work roll chock 37, work roll support bearing 38, bending plate 39, and auxiliary bearing 40.

As illustrated in FIG. 1, housing-side sole plate 31 has a quadrangular plate shape. Housing-side sole plate 31 extends in the left-right direction and the front-back direction. Housing-side sole plate 31 is placed on foundation G. Foundation G extends in the left-right direction and the front-back direction. Foundation G is a floor surface of a floor or a placement surface of a table, for example.

As illustrated in FIG. 1, upper plate 32 is disposed above housing-side sole plate 31. Upper plate 32 has a quadrangular plate shape. Upper plate 32 extends in the left-right direction and the front-back direction. Upper plate 32 faces housing-side sole plate 31 in the up-down direction.

As illustrated in FIG. 1, post 33 is disposed between housing-side sole plate 31 and upper plate 32 in the up-down direction. Post 33 has a quadrangular columnar shape extending in the up-down direction. Four posts 33 are provided. Posts 33 connect four respective corners of housing-side sole plate 31 and four corresponding corners of upper plate 32.

As illustrated in FIG. 2, four backup roll chocks 34 are disposed at respective positions above and below work roll 10 and near left and right ends of backup roll 20. Backup roll chocks 34 are disposed between housing-side sole plate 31 and upper plate 32 in the up-down direction. Backup roll chocks 34 each have a quadrangular plate shape. Backup roll chocks 34 each extend in the front-back direction and the up-down direction.

Backup roll chocks 34 on the upper side are coupled to upper plate 32 and extend downward from upper plate 32. Backup roll chocks 34 on the lower side are connected to housing-side sole plate 31 with respective pressure actuators 50 interposed therebetween and described later. Backup roll chocks 34 on the lower side extend upward from respective pressure actuators 50.

FIG. 5 is a side view of backup roll chock 34 as viewed from the outside in the left-right direction. Backup roll chock 34 includes cutout 34a that is in an arc shape and provided in a central part in the front-back direction of an edge part inside in the up-down direction. Backup roll chock 34 is provided with beam support hole 34b in its central part in the front-back direction and the up-down direction. Backup roll chock 34 is provided with two backup roll support holes 34c between cutout 34a and beam support hole 34b in the up-down direction. Two backup roll support holes 34c are disposed side by side in the front-back direction.

As illustrated in FIG. 2, work roll 10 passes through cutout 34a in the left-right direction. Beam support hole 34b is fitted with self-aligning bearing 35 described later. Backup roll support hole 34c is fitted with backup roll support bearing 36 (see FIG. 1). Shaft part 22 of backup roll 20 is supported by backup roll chock 34 using backup roll support bearing 36 fitted into backup roll support hole 34c.

As illustrated in FIG. 2, four work roll chocks 37 are disposed at respective positions above and below material K to be rolled and on the left side and the right side of backup roll chock 34. Work roll chocks 37 are disposed between housing-side sole plate 31 and upper plate 32 in the up-down direction. Work roll chocks 37 each have a quadrangular plate shape. Work roll chocks 37 each extend in the front-back direction and the up-down direction. Work roll chock 37 connects two posts 33 adjacent to each other in the front-back direction (see FIG. 1).

FIG. 6 is a side view of work roll chock 37 as viewed from the outside in the left-right direction. Work roll chock 37 includes a central part in the front-back direction and the up-down direction, the central part being provided with work roll support hole 37a.

As illustrated in FIG. 2, work roll support bearing 38 is fitted into work roll support hole 37a. Shaft part 12 of work roll 10 is supported by work roll chock 37 using work roll support bearing 38 fitted into work roll support hole 37a.

As illustrated in FIG. 2, four bending plates 39 are disposed at respective positions above and below material K to be rolled and on the left side and the right side of work roll chock 37. Bending plate 39 is disposed between housing-side sole plate 31 and upper plate 32 in the up-down direction. Bending plate 39 has a substantially quadrangular plate shape. Bending plate 39 extends in the front-back direction and the up-down direction.

Bending plate 39 on the upper side is connected to upper plate 32 with bending actuator 55 interposed therebetween and described later. Bending plate 39 on the upper side extends downward from bending actuator 55. Bending plate 39 on the lower side is connected to housing-side sole plate 31 with bending actuator 55 interposed therebetween. Bending plate 39 on the lower side extends upward from bending actuator 55.

FIG. 7 is a side view of bending plate 39 as viewed from the outside in the left-right direction. Bending plate 39 includes seat part 39a bulging in an arc shape and being provided at an edge part inside in the up-down direction. Seat part 39a of bending plate 39 is provided with auxiliary support hole 39b. Bending plate 39 includes beam through-hole 39c formed in a substantially central part in the front-back direction and the up-down direction. Beam through-hole 39c has an oval shape that is short in the front-back direction and long in the up-down direction.

As illustrated in FIG. 2, auxiliary support hole 39b is fitted with auxiliary bearing 40. Shaft part 12 of work roll 10 is supplementarily supported by bending plate 39 using auxiliary bearing 40 fitted into auxiliary support hole 39b. Beam member 60 described later passes through beam through-hole 39c in the left-right direction.

(Pressure Actuator)

As illustrated in FIG. 2, pressure actuator 50 pushes up backup roll 20 on the lower side supported by backup roll chock 34 on the lower side by pushing up backup roll chock 34 on the lower side. Pressure actuator 50 pushes up work roll 10 on the lower side toward material K to be rolled using backup roll chock 34 on the lower side and backup roll 20 on the lower side, thereby pressurizing material K to be rolled upward using work roll 10 on the lower side. Material K to be rolled is pressed in the up-down direction by work roll 10 on the upper side and work roll 10 on the lower side. As pressure actuator 50, a pneumatic type, an electric type, a hydraulic type, an electromagnetic type, or the like is applied, for example.

(Bending Actuator)

As illustrated in FIG. 2, bending actuator 55 pushes down bending plate 39 on the upper side and pulls down bending plate 39 on the lower side. Bending actuator 55 pushes down shaft part 12 of work roll 10 on the upper side supported by bending plate 39 on the upper side and pulls down shaft part 12 of work roll 10 on the lower side supported by bending plate 39 on the lower side.

Bending actuator 55 applies force to shaft part 12 of work roll 10 in a direction opposite to upward pressure force generated by pressure actuator 50. Bending actuator 55 suppresses deflection of work roll 10 caused by pressure generated by pressure actuator 50. As bending actuator 55, a pneumatic type, an electric type, a hydraulic type, an electromagnetic type, or the like is applied, for example.

(Beam Member)

As illustrated in FIG. 2, beam member 60 extends in the left-right direction (first direction) beside work roll 10. Two beam members 60 are disposed at respective positions above and below work roll 10. Beam member 60 has a cylindrical columnar shape extending in the left-right direction. Beam member 60 is also in a rod shape. Beam member 60 passes through housing 30 in the left-right direction.

FIG. 8 is a side view illustrating a positional relationship among beam member 60, work roll 10, and backup roll 20 as viewed in a direction of arrow VIII. As illustrated in FIG. 8, beam member 60 is disposed outside (above or below) work roll 10 in the up-down direction. In other words, beam member 60 is disposed on the side opposite to material K to be rolled in the up-down direction (second direction) across work roll 10.

Specifically, beam member 60 is disposed directly behind (directly above or directly below) work roll 10. In other words, beam member 60 is disposed on a side directly opposite (180° opposite) to material K to be rolled in the up-down direction (second direction) across work roll 10.

Beam member 60 is disposed between first backup roll 20a and second backup roll 20b of backup roll 20 in the front-back direction (third direction).

As illustrated in FIG. 2, housing 30 is provided with self-aligning bearing 35. Specifically, self-aligning bearing 35 is fitted into beam support hole 34b of backup roll chock 34 in housing 30. Beam member 60 is supported in backup roll chock 34 of housing 30 using self-aligning bearing 35.

Self-aligning bearing 35 has a structure in which balls (or rollers) are incorporated between an outer ring with a spherical raceway and an inner ring with a double-row raceway. The balls (or rollers) and the inner ring can rotate freely to some extent with respect to the outer ring. Self-aligning bearing 35 has alignment properties due to the raceway of the outer ring, the raceway having the center of curvature coinciding with the center of the bearing.

Beam member 60 is supported by backup roll chock 34 of housing 30 using self-aligning bearing 35. Thus, even when backup roll chock 34 of housing 30 is inclined or deflected, the inclination or deflection is absorbed by self-aligning bearing 35. The inclination and deflection of backup roll chock 34 of housing 30 do not affect beam member 60, so that beam member 60 is not inclined or deflected together with backup roll chock 34 of housing 30.

Beam member 60 passes through beam through-hole 39c of bending plate 39 in housing 30 in the left-right direction. Both end parts of beam member 60 are located outside housing 30 in the left-right direction.

(Displacement Sensor)

As illustrated in FIG. 2, displacement sensor 70 is provided on beam member 60. Specifically, displacement sensor 70 is fixed to beam member 60. Displacement sensor 70 is disposed on the inner side (the side close to material K to be rolled) in the up-down direction with respect to beam member 60. Two pairs of displacement sensors 70 are provided corresponding to beam members 60 on respective sides in the up-down direction.

Displacement sensor 70 includes first displacement measurement part 71 and second displacement measurement part 72. Displacement sensor 70 includes first displacement measurement part 71 and second displacement measurement part 72 that are spaced apart from each other in the left-right direction (first direction). First displacement measurement part 71 and second displacement measurement part 72 are spaced apart from each other by separation distance L in the left-right direction (first direction).

As illustrated in FIG. 8, displacement sensor 70 is disposed directly behind (directly above or directly below) work roll 10. In other words, displacement sensor 70 is disposed on the side directly opposite (180° opposite) to material K to be rolled in the up-down direction (second direction) across work roll 10. Displacement sensor 70 faces work roll 10 in the up-down direction from directly behind work roll 10.

As illustrated in FIG. 2, first displacement measurement part 71 of displacement sensor 70 faces a left end part of barrel 11 of work roll 10. Second displacement measurement part 72 of displacement sensor 70 faces a right end part of barrel 11 of work roll 10.

Displacement sensor 70 is an optical sensor, for example. Displacement sensor 70 measures displacement of work roll 10 in the up-down direction (second direction). First displacement measurement part 71 of displacement sensor 70 measures first distance δ1 between a leading end of first displacement measurement part 71 and an outer peripheral surface of a left end part of barrel 11 of work roll 10. Second displacement measurement part 72 of displacement sensor 70 measures second distance δ2 between a leading end of second displacement measurement part 72 and an outer peripheral surface of a right end part of barrel 11 of work roll 10.

(Vibration Sensor)

As illustrated in FIG. 2, vibration sensor 75 is provided on beam member 60. Specifically, vibration sensor 75 is fixed to beam member 60. Vibration sensor 75 is disposed on the outer side in the up-down direction (the side opposite to material K to be rolled) with respect to beam member 60. Two pairs of vibration sensors 75 are provided corresponding to beam members 60 on respective sides in the up-down direction.

Vibration sensor 75 is disposed at the same position as displacement sensor 70 in the front-back direction. Displacement sensor 70 and vibration sensor 75 are disposed on the same straight line extending in the up-down direction.

Vibration sensor 75 includes first vibration measurement part 76 and second vibration measurement part 77. Vibration sensor 75 includes first vibration measurement part 76 and second vibration measurement part 77 that are spaced apart from each other by separation distance L in the left-right direction (first direction).

First vibration measurement part 76 of vibration sensor 75 corresponds to first displacement measurement part 71 of displacement sensor 70 (disposed on the same straight line extending in the up-down direction). Second vibration measurement part 77 of vibration sensor 75 corresponds to second displacement measurement part 72 of displacement sensor 70 (disposed on the same straight line extending in the up-down direction).

Vibration sensor 75 is an acceleration sensor, for example. Examples of the acceleration sensor include a piezoelectric sensor, a piezoresistive sensor, and a capacitive sensor. Vibration sensor 75 measures vibration of displacement sensor 70, which is fixed to beam member 60, in the up-down direction (second direction). Specifically, vibration sensor 75 measures vibration acceleration of displacement sensor 70 in the up-down direction. Vibration sensor 75 calculates vibration displacement of displacement sensor 70 in the up-down direction based on the measured vibration acceleration.

First vibration measurement part 76 of vibration sensor 75 obtains vibration displacement δ1′ of first displacement measurement part 71 of displacement sensor 70 in the up-down direction. Second vibration measurement part 77 of vibration sensor 75 obtains vibration displacement δ2′ of second displacement measurement part 72 of displacement sensor 70 in the up-down direction.

(Beam Support Member)

As illustrated in FIG. 2, beam support member 80 supports beam member 60. Beam support member 80 includes beam support member-side sole plate 81, extension member 82, and slide member 83.

As illustrated in FIG. 1, beam support member-side sole plate 81 has a quadrangular plate shape. Two beam support member-side sole plates 81 are disposed on respective outer sides of housing-side sole plate 31 of housing 30 in the left-right direction. Beam support member-side sole plate 81 extends in the left-right direction and the front-back direction. Beam support member-side sole plate 81 is placed on foundation G.

Beam support member-side sole plate 81 of beam support member 80 and housing-side sole plate 31 of housing 30 are not connected to each other, and gap C is formed therebetween (see FIG. 2). That is, beam support member-side sole plate 81 of beam support member 80 and housing-side sole plate 31 of housing 30 are independent of each other. Specifically, beam support member-side sole plate 81 of beam support member 80 and housing-side sole plate 31 of housing 30 are placed on foundation G independently of each other.

As illustrated in FIG. 2, extension member 82 is connected to beam support member-side sole plate 81. Extension member 82 extends upward in the up-down direction (second direction) from beam support member-side sole plate 81. Extension member 82 is a linear guide A rail is provided inside extension member 82 in the left-right direction.

Extension member 82 supports beam member 60. Specifically, beam member 60 on the upper side is directly supported by extension member 82 by being fixed to extension member 82. Slide member 83 is slidable in the up-down direction along the rail inside extension member 82 in the left-right direction. Beam member 60 on the lower side is indirectly supported by extension member 82 by being fixed to slide member 83. Beam member 60 on the lower side and slide member 83 move in the up-down direction along extension member 82 by following movement of backup roll chock 34 on the lower side in the up-down direction.

(Inclination Actuator)

As illustrated in FIG. 1, four inclination actuators 90 are disposed at four respective corners of housing-side sole plate 31 in housing 30. Inclination actuator 90 is composed of a screw mechanism, for example.

FIG. 9 illustrates a schematic view of inclination actuator 90. Inclination actuator 90 inclines housing 30 with respect to foundation G. Inclination actuator 90 includes rod member 91, and motor 92 as a driver.

Rod member 91 has a rod shape extending in the up-down direction. Rod member 91 is also in a cylindrical columnar shape. Rod member 91 has a threaded outer periphery. Housing-side sole plate 31 is provided at four corners with respective through-holes 31a passing through the plate in the up-down direction. Through-hole 31a has a threaded inner periphery. Rod member 91 passes through through-hole 31a of housing-side sole plate 31 in the up-down direction.

Motor 92 is disposed close to an upper surface of housing-side sole plate 31. Motor 92 has an axis oriented in the up-down direction. Motor 92 includes a drive shaft (not illustrated) that is coupled to rod member 91. Motor 92 rotates rod member 91 in one direction to cause rod member 91 to protrude downward in the up-down direction (second direction) from a lower surface of housing-side sole plate 31 toward foundation G. Motor 92 rotates rod member 91 in the other direction to cause rod member 91 to retract upward toward the inside of housing-side sole plate 31.

Inclination actuator 90 inclines housing 30 with respect to foundation G by using motor 92 that causes rod member 91 to protrude downward from the lower surface of housing-side sole plate 31 toward foundation G.

A mode of the inclination of housing 30 varies depending on which inclination actuator 90 among four inclination actuators 90 is driven and how much the amount of protrusion of rod member 91 is set.

When housing 30 is tilted (inclined) with respect to foundation G by inclination actuator 90 with work roll 10 extending straight in the left-right direction, work roll 10 supported by backup roll chock 34 of housing 30 is also tilted (inclined) with respect to foundation G.

Two inclination actuators 90 are separate from each other by separation distance E in the left-right direction (first direction). Rod member 91 in inclination actuator 90 on the left side does not protrude in the up-down direction from the lower surface of housing-side sole plate 31 toward foundation G (the amount of protrusion is zero). Rod member 91 in inclination actuator 90 on the right side protrudes downward in the up-down direction from the lower surface of housing-side sole plate 31 toward foundation G by the amount of protrusion λ.

A difference in the amount of protrusion between the amount of protrusion (=0) of rod member 91 in inclination actuator 90 on the left side and the amount of protrusion λ of rod member 91 in inclination actuator 90 on the right side is λ (λ−0).

Inclination angle τ of housing-side sole plate 31 with respect to foundation G in housing 30 is obtained by τ=Sin⁻¹ (λ/E) using separation distance E and difference λ in the amount of protrusion.

(Inclination of Work Roll)

FIG. 10 illustrates inclination of work roll 10. First correction distance (δ1−δ1′) is obtained by subtracting first vibration displacement δ1′ from first distance δ1, first vibration displacement δ1′ being displacement in the up-down direction of first displacement measurement part 71 itself of displacement sensor 70 obtained by first vibration measurement part 76 of vibration sensor 75, and first distance δ1 being distance in the up-down direction between first displacement measurement part 71 of displacement sensor 70 and work roll 10. Second correction distance (δ2−δ2′) is obtained by subtracting second vibration displacement δ2′ from second distance δ2, second vibration displacement δ2′ being displacement in the up-down direction of second displacement measurement part 72 itself of displacement sensor 70 obtained by second vibration measurement part 77 of vibration sensor 75, and second distance δ2 being distance in the up-down direction between second displacement measurement part 72 of displacement sensor 70 and work roll 10.

First correction distance (δ1−δ1′) is obtained by subtracting noise of first vibration displacement δ1′ from first distance δ1. Second correction distance (δ2−δ2′) is obtained by subtracting noise of second vibration displacement δ2′ from second distance δ2.

First correction distance (δ1−δ1′) is subtracted from second correction distance (δ2−δ2′) to obtain a difference distance expressed by δ={(δ2−δ2′)−(δ1−δ1′)}. As described above, first displacement measurement part 71 and second displacement measurement part 72 in displacement sensor 70 are spaced apart by separation distance L in the left-right direction.

Inclination angle θ of work roll 10 with respect to foundation G is obtained by θ=Sin⁻¹ (δ/L) using separation distance L and difference distance δ.

Inclination actuator 90 may incline housing 30 with respect to foundation G by inclination angle θ of work roll 10 with respect to foundation G in a direction opposite to a direction of the inclination of work roll 10 with respect to foundation G. Specifically, inclination angle τ of housing-side sole plate 31 with respect to foundation G in housing 30 may be set in a direction opposite to inclination angle θ of work roll 10 with respect to foundation G with a value equal to θ (τ=−θ).

(Operation and Effect)

In rolling machine 1 according to the present exemplary embodiment, beam support member 80 supporting beam member 60 and housing 30 supporting work roll 10 are independent of each other. Thus, even when work roll 10 is inclined in the up-down direction for some reason, beam member 60 is prevented from being inclined in the up-down direction together with work roll 10.

Beam member 60 is not inclined in the up-down direction together with work roll 10, so that pure displacement of work roll 10 in the up-down direction can be measured by displacement sensor 70 provided in beam member 60.

Based on the displacement of work roll 10 in the up-down direction measured by displacement sensor 70 supported by beam member 60, housing 30 supporting work roll 10 is inclined in a direction opposite to the inclination of work roll 10 and by the same amount of the inclination. Consequently, the inclination of work roll 10 can be suppressed in rolling machine 1.

Housing 30 supporting work roll 10 can be easily inclined by inclination actuator 90.

First displacement measurement part 71 and second displacement measurement part 72 in displacement sensor 70 are spaced apart from each other in the left-right direction, thus are advantageous for measurement of inclination of work roll 10.

Beam member 60 is supported in backup roll chock 34 of housing 30 using self-aligning bearing 35. Inclination and deflection of housing 30 are absorbed by self-aligning bearing 35. Using self-aligning bearing 35 enables preventing beam member 60 from being inclined or bent together with housing 30 although beam member 60 is supported by housing 30.

Measuring vibration of displacement sensor 70 itself using vibration sensor 75 enables removing noise caused by the vibration of displacement sensor 70 itself from displacement of work roll 10 obtained by displacement sensor 70.

Beam member 60 is disposed on the side opposite to material K to be rolled in the up-down direction across work roll 10, so that interference between beam member 60 and material K to be rolled can be prevented.

In particular, beam member 60 is disposed on the side directly opposite (180° opposite) to material K to be rolled in the up-down direction across work roll 10, so that displacement sensor 70 provided on beam member 60 facilitates measurement of displacement of work roll 10 in the up-down direction.

Beam member 60 is disposed between first backup roll 20a and second backup roll 20b of backup roll 20 in the front-back direction. Consequently, interference between beam member 60 and backup roll 20 can be prevented.

Beam support member 80 and housing 30 are placed on foundation G independently of each other. Consequently, beam support member 80 and housing 30 can be easily formed separately and independently.

Housing 30 can be easily inclined with respect to foundation G by inclination actuator 90 including rod member 91 and motor 92.

Beam support member-side sole plate 81 and housing-side sole plate 31 are placed on foundation G independently of each other, so that beam support member 80 and housing 30 can be more easily formed separately and independently.

Backup roll 20 is movable in the axial direction (the left-right direction, the first direction) with respect to work roll 10 using the roll shift function. The roll shift function changes distribution of support force acting on work roll 10 from backup roll 20. Consequently, distribution of pressurizing force acting on material K to be rolled from work roll 10 is changed, and flatness of material K to be rolled can be finely adjusted.

Although using the roll shift function causes work roll 10 to be likely to incline, inclination actuator 90 may suppress inclination of work roll 10 even when work roll 10 has inclined.

Second Exemplary Embodiment

Rolling machine 1 according to a second exemplary embodiment will be described. FIG. 11 is a diagram corresponding to FIG. 2 and according to the second exemplary embodiment. FIG. 12 is a diagram corresponding to FIG. 5 and according to the second exemplary embodiment. In the following description, the same components as those of the above exemplary embodiment are denoted by the same reference numerals, and may not be described in detail.

In the present exemplary embodiment, beam support hole 41 is formed in backup roll chock 34 as a wall part of housing 30. Beam support hole 41 is formed to be long in the front-back direction and short in the up-down direction. Beam member 60 is formed to be long in the front-back direction and short in the up-down direction. Beam member 60 is inserted into beam support hole 41 in the left-right direction. Gap H is formed between beam member 60 and beam support hole 41 in the up-down direction.

Beam member 60 on the lower side is connected to spring 42 as an elastic member. Backup roll chock 34 on the lower side has an outer surface in the left-right direction to which support member 43 is fixed. Beam member 60 on the lower side is connected to backup roll chock 34 on the lower side using spring 42 and support member 43. Spring 42 pulls (biases) beam member 60 on the lower side downward to bring beam member 60 on the lower side into contact with a lower inner surface of beam support hole 41.

Other configurations are similar to those of the first exemplary embodiment.

According to the present exemplary embodiment, gap H between beam member 60 and beam support hole 41 exhibits functions as in self-aligning bearing 35 according to the first exemplary embodiment.

Other Exemplary Embodiments

Although the present disclosure has been described with reference to preferable exemplary embodiments, the present disclosure is not limited to the above description, and various modifications can be surely made.

In the above exemplary embodiments, backup roll 20 is disposed being shifted by 45° in the front-back direction from directly behind work roll 10 (a side directly opposite to, directly above, or directly below material K to be rolled in the up-down direction (second direction) across work roll 10). Besides this, the backup roll may be disposed being shifted by an angle other than 45° from directly behind work roll 10 or may be disposed directly behind work roll 10.

Displacement sensor 70 is not limited to an optical sensor. Besides the optical type, displacement sensor 70 may be a contact type, an eddy current type, an ultrasonic type, or the like.

The vibration sensor is not limited to an acceleration sensor, and may be a speed sensor, or a displacement sensor, for example.

Inclination actuator 90 is not limited to a screw mechanism, and may be a piston and cylinder mechanism, for example. For the inclination actuator, a pneumatic type, an electric type, a hydraulic type, an electromagnetic type, or the like is applied as the piston and cylinder mechanism.

Housing 30 may be inclined manually without using inclination actuator 90.

Backup rolls 20 are not limited to two pairs (four), and may be one pair (two) or three pairs or more (six or more). Backup roll 20 herein shows a concept of including an intermediate roll.

The front-back direction, the left-right direction, and the up-down direction may not be orthogonal to each other, and may obliquely intersect each other slightly.

Beam support member 80 and housing 30 may be fixed to a vertical wall part, for example, instead of being placed on foundation G. Alternatively, one of both of them may be fixed to foundation G, and the other of both of them may be fixed to the vertical wall part, for example.

Material K to be rolled may be fed in the left-right direction or the up-down direction, for example, instead of being fed in the front-back direction. Material K to be rolled may not have a plate shape. In particular, when material K to be rolled is made of powder, material K to be rolled often has a shape other than the plate shape.

Although the first direction is the left-right direction, the second direction is the up-down direction, and the third direction is the front-back direction in the above exemplary embodiments, the first to third directions are not limited thereto. Selection of direction can be appropriately changed depending on the configuration of rolling machine 1.

INDUSTRIAL APPLICABILITY

The present disclosure can be applied to a rolling machine, so that the present disclosure is extremely useful and has high industrial applicability.

REFERENCE MARKS IN THE DRAWINGS

• • X: front-back direction (third direction)
  • Y: left-right direction (first direction)
  • Z: up-down direction (second direction)
  • K: material to be rolled
  • G: foundation
  • C: gap
  • L: separation distance
  • E: separation distance
  • δ: difference distance
  • λ: difference in the amount of protrusion
  • θ: inclination angle
  • τ: inclination angle
  • H: gap
  • 1: rolling machine
  • 10: work roll
  • 20: backup roll
  • 20a: first backup roll
  • 20b: second backup roll
  • 30: housing
  • 31: housing-side sole plate
  • 34: backup roll chock (wall part)
  • 35: self-aligning bearing
  • 37: work roll chock
  • 41: beam support hole (support hole)
  • 60: beam member
  • 70: displacement sensor
  • 71: first displacement measurement part
  • 72: second displacement measurement part
  • 75: vibration sensor
  • 76: first vibration measurement part
  • 77: second vibration measurement part
  • 80: beam support member
  • 81: beam support member-side sole plate
  • 82: extension member
  • 90: inclination actuator
  • 91: rod member
  • 92: motor (driver)