Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Utility Patent
1999-11-29
2001-01-02
Butler, Rodney A. (Department: 3725)
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
Utility Patent
active
06167738
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a method and an apparatus for replacing the rollers of rolling mills of different sizes and in particular to a method and apparatus where a conveyor means removes the roller mounting of the rolling mill, which essentially comprises mounting pieces connected to one another by means of connecting elements, as well as the rollers journalled rolls in them, from the roller stand of the rolling mill and passes them to an apparatus for replacing the rollers arranged exteriorly of the rolling line.
2. The Prior Art
It is known to replace the rollers of rolling mills using a suitable floor conveyor means, for example a crane, which removes the roller mounting from the roller stand of the rolling mill and deposits them outside of the rolling line in an upright position in a roller exchange apparatus.
Subsequently, for de-mounting of the rollers, the required clamps and connections are released and the rollers are supported in their original position by means of corresponding configured roller support equipment. Thereafter, the mounting pieces, together with pull anchor and associated position drives, are removed on both sides of the rollers from the lift trunnion with the aid of a slide device.
Next, the rollers are, one after the other, replaced with new rollers. This is done using a roller transport dolly, which removes the rollers to be replaced sequentially from the roller support equipment and deposits them on a roller support dolly, and the new rollers are taken from the roller transport dolly and deposited on the roller support equipment. After the new rollers have been placed on the roller support equipment, the assembly of the roller mounting continues in reverse sequence.
It is also known to arrange with respect to the rolling mill lines, roller replacing devices which are adapted to the respective sizes of the rolling mills, with correspondingly high equipment and maintenance effort, as well as space requirements.
Against this background, the following described invention commences.
SUMMARY OF THE INVENTION
The aim of the invention is to provide a method and apparatus for replacing rollers of rolling mills with different sizes with which the mentioned drawbacks of the state of the art are avoided so that with lowered technical installed equipment effort, the replacing of the rollers for rolling mills with different sizes, commencing with the removal of the roller mounting from the rolling mill, continuing with the replacing per se, until the re-assembly of the roller mounting into the rolling mill, takes place in at least the time frame which is required to carry out replacing of rollers with roller replacing equipment which is adapted to the respective rolling mill size. In particular, the space required for replacing the rollers is reduced.
In accordance with the invention this problem is solved through a method for replacing the rollers of rolling mills having different sizes, whereby a conveyor means removes the roller mounting of the rolling mill, which essentially comprises mounting pieces connected to one another by means of connecting elements, as well as the rollers journalled in them, from the roller stand of the rolling mill and passes them to an apparatus for replacing the rollers arranged exteriorly of the rolling line, and whereby by means of the apparatus for replacing the rollers the following process steps are successively carried out:
the roller mounting is removed in an upright position and is subsequently swung into a horizontal position,
subsequently, the mounting pieces of the roller mounting on both ends of the rollers in the horizontal position are removed from the lift trunnions of the rollers and brought into a park position,
thereafter the rollers are replaced in pairs,
next, the mounting pieces of the roller mounting are returned in the direction of the lift trunnions of the new rollers and moved thereonto, and
finally, the complete rollers mounting is swung into the original upright position and returned by means of the conveyor means into the roller stand of the rolling mill.
In accordance with an embodiment of the invention, the roller mounting is positioned upright onto a support adapter of a swing device I which forms part of the apparatus for replacing rollers and which can be swung into a horizontal position and back therefrom. The support adapter is sized in accordance with the size of the rolling mill and replaceable.
In a further embodiment of the invention, a slide device II forms a second part of the apparatus for replacing the rollers. Slide device II removes the mounting pieces of the roller mounting at both ends of the rollers in the horizontal position from the lift trunnions of the rollers and moves them to a park position as well as out from the park position and can also move them onto the lift trunnions of the new rollers.
Furthermore, a transport device III forming a third part of the apparatus for replacing the rollers replaces the rollers
1
in pairs. The transport device III is related to the rolling mill size, and is replaceable and multifunctional for an above floor conveyor means. It is also possible in accordance with the invention for the multifunctional transport device III to transport both the complete roller mounting as well as the rollers and the replaceable support adapter. In addition, it is possible to use a separate support adapter of the swing device I and a separate transport device III for each mill size.
The invention also provides an apparatus for replacing the rollers of rolling mills of different sizes, whereby a conveyor means removes the roller mounting of the rolling mill, which essentially comprises mounting pieces connected to one another by means of connecting elements, as well as the rollers journalled in them, from the roller stand of the rolling mill and passes them to an apparatus for replacing the rollers arranged exteriorly of the rolling line. In particular, the apparatus for replacing the rollers comprises a swing device I for the roller mounting from an upright position into a horizontal position and back, a slide device II for the mounting pieces, as well as a multifunctional transport device III which is related to the size of the mill and is replaceable.
In a further embodiment of the apparatus of the invention, the swing device I for the roller mounting is centrally arranged between two shunt carriages arranged symmetrically in mirror-image fashion with respect to one another on a base frame of the slide device II for the mounting pieces and is provided with a replaceable, swingable support adapter related to the size of the mill, for the roller mounting which can be deposited onto the base frame so that the rollers are arranged alongside one another and centrally symmetrically with respect to the axes of symmetry of the shunt carriages.
A further measure contemplates linear drives displacing the shunt carriages in the axial direction of the rollers. The shunt carriages are furnished with respective centering and clamping elements for the respectively associated pair of mounting pieces of the roller mounting.
In addition, swing device I of the roller mounting may comprise a rotation-permitting swing cylinder, centrally arranged beneath the slide device II. The swing cylinder has a piston rod head which, in turn, is rotatably connected to the replaceable support adapter. The support adapter, in turn, comprises two swingably linked support elements arranged parallel with respect to one another, and fixedly connected to one another at the machine/mill/apparatus or hall floor or at the base frame. The support elements are configured, in turn, with contours adapted to the mill size for the support of the lift trunnions of the rollers.
Preferably, the distance of the two support elements of the support adapter is selected such that these elements support the rollers at their lift trunnions in the range between the mounting pieces. It is further contemplated that the support elements per se exhibit the contours o
Hörold Gunter
Steglich Christian
Butler Rodney A.
Collard & Roe P.C.
SKET Walzwerkstechnik GmbH
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