Sms Demag Ag

Sms Group Gmbh

Sms Siemag Aktiengesellschaft

Andreas Ritter

Rüdiger Holz

Markus Koch

Peter Sudau

Andreas Berendes

Klaus-Dieter Haberkamm

Frank Theobald

The invention relates to a method, a computer program and a rolling mill train for cold rolling a metal strip (). In order to achieve a shortening of undesired off-gauge lengths, the method according to the invention provides that the head () of the metal strip () already undergoes a thickness reduction at the first active rolling stand (n) in the rolling mill train, and then is transported on to the next rolling stand, in order to undergo a further thickness reduction there. The method according to the invention also provides for further reducing the initial pass thickness at the n-th rolling stand in accordance with the tensile stress that has built up in the meantime between the n+1-th and the n-th rolling stand.

Method, computer program and rolling mill train for rolling a metal strip

The invention relates to a measuring device, a roll stand and a method for detecting the height of a roll gap between two working rolls in the roll stand. In order to ensure a high level of measurement accuracy of the roll gap transmitter even in the case of horizontal displacement of the working rolls in or against the rolling direction it is proposed in accordance with the invention to carry out adjusting the movement of the roll gap transmitter () with respect to the working rolls in the case of a displacement in or against the rolling direction so that even in a new or displaced end position of the working rolls a suitable relative position, which is required for a high level of measurement accuracy, between roll gap transmitter and the working rolls is guaranteed.

Measuring device, roll stand and method of detecting the height of a roll gap

The invention relates to a method for the optimization of shift strategies, as a function of the strip width, for best possible usage of the advantages of CVC/CVCtechnology in operation of strip-edge oriented shifts in 4-/6-roller stands, comprising a pair of working rollers and a pair of support rollers for a 4-roller stand and, in addition, a pair of intermediate rollers for a 6-roller stand, whereby at least the working rollers and the intermediate rollers cooperate with devices for axial shifting, characterized in that selection of the shift position (VP), for the shifting working/intermediate rollers, is made as a function of strip width. The working/intermediate rollers are then positioned in various positions (P), relative to the strip edge and, within differing strip width ranges (B), the shift position (VP) of each roller is given by an incremental linear progressive function.

Optimised shift strategy as a function of strip width

A method for the strip-edge-oriented shifting of the intermediate rolls (') in a six-roll rolling mill comprising respectively a pair of workrolls (&#x2032;), intermediate rolls (&#x2032;) and backup rolls (&#x2032;), whereby at least the intermediate rolls (&#x2032;) and workrolls (&#x2032;) have devices for axial shifting cooperating with them and each intermediate roll (&#x2032;) has a barrel elongated by the amount of the CVC-shifting stroke and a one sided setback (x) in the region of the strip edge. The method is characterized in that the upper intermediate roll () is shifted in the direction of the drive side AS) and the lower intermediate roll (&#x2032;) is shifted in the direction of the service side (BS)&#x2014;or conversely&#x2014;relative to the neutral shift position (S=0 mm) symmetrically to the rolling mill center (y&#x2014;y) be respectively the same amount in the direction of their (x&#x2014;x).

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Haiger, Germany

Andreas Ritter