A rolling mill stand has two working rolls forming a roll gap in which a rolled product transported in a conveying direction can be formed. The positioning of at least one working roll is variable in a plane perpendicular to the conveying direction. The rolling mill is used in a method which comprises: conveying the rolled product through the roll gap in the conveying direction and at the same time opening or closing the rolling mill stand by correspondingly increasing or decreasing the roll gap; during opening or closing of the roll stand, detecting a position of the rolled product in front of and/or behind the roll gap in the direction transverse to the conveying direction; and changing the positioning of the corresponding working roll depending on the detected position, so that the rolled product is stabilized at a target position during opening or closing of the roll stand.

A rolling mill stand has two working rolls forming a roll gap in which a rolled product transported in a conveying direction can be formed. The positioning of at least one working roll is variable in a plane perpendicular to the conveying direction. The rolling mill is used in a method which comprises: conveying the rolled product through the roll gap in the conveying direction and at the same time opening or closing the rolling mill stand by correspondingly increasing or decreasing the roll gap; during opening or closing of the roll stand, detecting a position of the rolled product in front of and/or behind the roll gap in the direction transverse to the conveying direction; and changing the positioning of the corresponding working roll depending on the detected position, so that the rolled product is stabilized at a target position during opening or closing of the roll stand.

There is provided a rolling mill that includes a plurality of rolls, in which any one roll among respective rolls is adopted as a reference roll, including a load detection apparatus, detects a vertical roll load at a rolling support point position; a pressing apparatus pressing the roll chocks in the rolling direction; a driving apparatus moving the roll chocks in the rolling direction; and a position control unit which fixes a rolling direction position of roll chocks of the reference roll, and drives the driving apparatus to control positions in the rolling direction of the roll chocks of the rolls other than the reference roll.

Metal plastic forming processes and equipment that provides a flexible skew rolling mill with dual-rotatable-shafts, including a base unit, a guide unit, two rollers, two servo main-shaft systems, a roller distance adjusting mechanism, two tilt angle adjusting mechanisms, a cooling system and a numerical control system. The two servo main-shaft systems are mounted under the support of the two beds, thereby driving the two rollers to do rotation motion; the roller distance adjusting mechanism drives the two beds, thereby enabling the two rollers to do synchronous centering and radial feed motion; the two tilt angle adjusting mechanisms drive the servo main-shaft systems respectively to rotate around a horizontal rolling center line and enable the two rollers to do tilt angle adjustment motion; and the numerical control system controls a rotating speed, radial feed and tilt angle adjustment of the two rollers, such that skew rolling mills and rollers of the same dimensions and specification can form shaft parts of different dimensions and specifications by flexible skew rolling. The flexible skew rolling mill with dual-rotatable-shafts has the advantages that the beds are synchronously centered and radial feed, the strength of the beds is high, the mounting and debugging are convenient, flexible production can be realized and the like such that the flexible skew rolling mill has broad prospects of being applied to the field of forming large-diameter shaft parts with diversified specifications.

The invention relates to a device 1 for positioning an edging roll 10 of an edging stand, comprising an edging frame 12 to which at least one balancing cylinder 14 is attached, a balancing crossbeam 16 with a drive side 18 positioned opposite of the edging frame 12, and a working side 19 positioned opposite of the drive side 18, wherein a bearing device 20 for the edging roll 10 can be attached, in particular in an interlocking manner, to the balancing crossbeam 16 on the working side 19 thereof and at least one linkage 24 is provided on the drive side 18 thereof, by which linkage the balancing cylinder 14 is in an operative connection with the balancing crossbeam 16, and at least one positioning cylinder 26 attached to the edging frame 12 can be brought into an operative connection with the bearing device (20) in the direction of a rolled material in order to position the edging roll 10 against the rolled material, wherein the compressive force generated by the positioning cylinder 26 acts on the bearing device 20 along an operational axis 28, which either intersects with the at least one linkage 24 by which the balancing cylinder 14 is operatively connected with the balancing crossbeam 16 or runs directly alongside this linkage 24.

The invention relates to a device 1 for positioning an edging roll 10 of an edging stand, comprising an edging frame 12 to which at least one balancing cylinder 14 is attached, a balancing crossbeam 16 with a drive side 18 positioned opposite of the edging frame 12, and a working side 19 positioned opposite of the drive side 18, wherein a bearing device 20 for the edging roll 10 can be attached, in particular in an interlocking manner, to the balancing crossbeam 16 on the working side 19 thereof and at least one linkage 24 is provided on the drive side 18 thereof, by which linkage the balancing cylinder 14 is in an operative connection with the balancing crossbeam 16, and at least one positioning cylinder 26 attached to the edging frame 12 can be brought into an operative connection with the bearing device (20) in the direction of a rolled material in order to position the edging roll 10 against the rolled material, wherein the compressive force generated by the positioning cylinder 26 acts on the bearing device 20 along an operational axis 28, which either intersects with the at least one linkage 24 by which the balancing cylinder 14 is operatively connected with the balancing crossbeam 16 or runs directly alongside this linkage 24.

In a small-size rolling mill or a roll press machine, to provide a hydraulic screw-down device compatible with the plate thickness accuracy without using a hydraulic control servo valve. A hydraulic screw-down device that is comprised of a screw to move a piston arranged in a booster cylinder back and forth, and a motor that gives rotational force to the screw controlling freely the rotational angle of the screw so as to move the piston to the purpose position. A screw-down cylinder connected with the booster cylinder through piping makes a ram in the screw-down cylinder move vertically by the move of oil caused by the movement of the piston in the booster cylinder and thereby enables push-up and push-down of the mill roll.

In a small-size rolling mill or a roll press machine, to provide a hydraulic screw-down device compatible with the plate thickness accuracy without using a hydraulic control servo valve. A hydraulic screw-down device that is comprised of a screw to move a piston arranged in a booster cylinder back and forth, and a motor that gives rotational force to the screw controlling freely the rotational angle of the screw so as to move the piston to the purpose position. A screw-down cylinder connected with the booster cylinder through piping makes a ram in the screw-down cylinder move vertically by the move of oil caused by the movement of the piston in the booster cylinder and thereby enables push-up and push-down of the mill roll.

A segmental calendering device includes a framework, a pair of left-rolling sliding guide mechanism, a pair of right-rolling sliding guide mechanisms, an upper-calendering roller and a supporting mechanism of the upper-calendering roller, a lower-calendering roller as well as a pressing mechanism. The upper-calendering roller is rotatably supported within the supporting mechanism of the upper-calendering roller and disposed above a position between a left wallboard and a right wallboard of the framework, and the supporting mechanism of the upper-calendering roller slides along the pair of left-rolling sliding guide mechanisms and the pair of right-rolling sliding guide mechanisms. The lower-calendering roller is disposed below the upper-calendering roller correspondingly and rotatably supported between the left wallboard and the right wallboard. The pressing mechanism is for applying a pressure on the supporting mechanism of the upper-calendering roller and for adjusting the pressure.

A segmental calendering device includes a framework, a pair of left-rolling sliding guide mechanism, a pair of right-rolling sliding guide mechanisms, an upper-calendering roller and a supporting mechanism of the upper-calendering roller, a lower-calendering roller as well as a pressing mechanism. The upper-calendering roller is rotatably supported within the supporting mechanism of the upper-calendering roller and disposed above a position between a left wallboard and a right wallboard of the framework, and the supporting mechanism of the upper-calendering roller slides along the pair of left-rolling sliding guide mechanisms and the pair of right-rolling sliding guide mechanisms. The lower-calendering roller is disposed below the upper-calendering roller correspondingly and rotatably supported between the left wallboard and the right wallboard. The pressing mechanism is for applying a pressure on the supporting mechanism of the upper-calendering roller and for adjusting the pressure.