Mannesmann Aktiengesellschaft

Chaparral Steel Company

Peter Fink

Dieter Figge

Lloyd M Schmelzle

Libor F Rostik

A roll stand for a planetary rolling mill having a housing, and two stationary support members mounted in chocks, with rolling segments and intermediate and work rolls mounted in rotationally driven cages. The support members have a plurality of rolling segments, spaced about an outer surface thereof. By the turning of the support members, the rolling segments can be brought, in each case, into working position. In order to be able to effect a change of the rolling segments while using the favorable torque division of the drive system for the roll cages, the support members (1) are rotatably mounted in their chocks (15) adapted to be clamped (20) in the working position of the rolling segments (16). A drive is selectably engaged to rotate the support member into a new working position.

Roll stand for a planetary rolling mill

A device for facilitating the grinding of the working rolls of a planetary rolling mill in which working rolls are mounted together with intermediate rolls in cages which rotate about a support body, a rolling mill having an upper planet roll and a lower planet roll. In order to provide a low cost and economically operating roll grinding device, allowing simple, fast and precise grinding of the working rolls with reduced mill down time, a planet roll (1) is associated with a manipulating device (2) which is moveable in at least three planes or axes of movement and with which the working rolls (3) can be removed individually from the planet roll (1) and fed to a grinding device (5) as well as returned into the planet roll (1).

Device for grinding the working rolls of a planetary mill

The present invention relates to a roll stand for a planetary rolling mill having roll housings, stationary support bodies which are mounted on insert pieces, which have at least one rolling segment inserted therein, with hardened segment inserts, and intermediate and work rolls mounted in cages and rotating around the support bodies. Upon their rotation around the support bodies, these rolls are brought against the intermediate rolls and the latter are brought against the support bodies. The rolling surface of the rolling segments is formed by the segment inserts which have a flattened cross-sectional shape, in the region of the shaping zone, differing from the circular cross sectional shape of the support bodies having a rolling surface which can vary in position with respect to the support body by displacement of the segment inserts, individually or in groups, in a direction perpendicular to the axis of the support body.

A roll stand for a planetary rolling mill includes two stationary opposed support bodies having an axis and forming a shaping zone there between; a plurality of intermediate rolls and a plurality of working rolls mounted for rotation around the support bodies and a rotatable member within at least one of these support bodies. The rotatable member has an axis of rotation parallel to the axis of the support body and is formed by a plurality of rolling segments each extending in a plane and having a curved geometry. Each rolling segment is made up of a plurality of spaced rolling surfaces extending in a direction of rolling for supporting the intermediate rolls within the shaping zone. The rotatable member is releasable mounted in three different planes within the support body.

Planetary rolling mill

A continuous process and system for making flat rolled steel or ferrous metal strip having a minimum thickness sufficient to allow substantially direct product manufacture therefrom, wherein a Platzer planetary mill continuously receives an as-continuously cast endless slab of steel or ferrous metal and effects a first reduction in thickness from the as-continuously cast thickness of the slab, a plurality of millstands sequentially receive the continuous strip from the Platzer planetary mill to effect a second reduction in thickness of at least about 50% of the first reduced thickness to provide a continuous strip having an average thickness of less than about 1.8 mm, and electric induction reheaters are placed between each adjacent pair of millstands to maintain the continuous strip at a working temperature sufficient to effect the second reduction in thickness.

System and process for forming thin flat hot rolled steel strip

The work rolls of a planetary rolling mill are subject to high wear and must, therefore, be frequently reground to assure precision of the material rolled. With a life of the work rolls of about six hours, the expenditure of about 12 hours of a mechanic solely for the removal and reinstallation of the 48 rolls of a roll frame represents a considerable cost factor. To substantially reduce the time and expense of regrinding, a complete planet roll with cages and chocks is removed from a roll stand and clamped into a grinding device having a grinding wheel, and then the work rolls are ground, one after the other, in an installed state.

Method and apparatus for grinding the work rolls of a planetary rolling

To substantially increase the periods of time between the changing of rolling segments and to reduce the amount of work connected therewith in a roll stand for a planetary rolling mill, chocks in which stationary support bodies having rolling segments are mounted are provided with a square or octagonal disk shape, and each support body, instead of having one rolling segment as known heretofore, is provided with four or eight rolling segments distributed uniformly on its periphery. A turnable rolling ring is, further, provided at each end of each support body.

Growing community of inventors

Essen, Germany

Peter Fink