Primetals Technologies Germany Gmbh

Siemens Industry, Inc.

Morgan Construction Company

Yun Ling

Paul Barry Riches

T Michael Shore

Melicher Puchovsky

Kenneth Plante

Cristiano Justen

During rolling of front sections of rolling material in a rear group of roll stands of a rolling mill, rear sections of the rolling material are rolled in the front group of roll stands. A run-out speed with which the rolling material is exiting the front group of roll stands is detected. A run-in speed with which the rolling material is entering the rear group of roll stands is detected. A rolling speed with which the rear group of roll stands is driven is controlled by a controller such that a relation of the run-in speed to the run-out speed equals a predetermined value. The predetermined value is kept constant until a time point at which a tail end of the rolling material reaches a predetermined location upstream of the front group of roll stands, and is changed according to a predetermined function after the time point.

Rolling of rolling material with tension change at the rolling of the tail end of the rolling material

A billet () is rolled to a rod () in a rolling mill. The rod () exits the rolling mill with a finishing temperature (TE). A rear laser measurement device () arranged downstream of the rolling mill detects the head end and the speed (v) of the rod (). The detected speed (v) of the rod () is integrated to its length and an instantaneous length (L) of the rod () is determined. Dependent on the determined instantaneous length (L) of the rod (), cutting commands (S) to a rear shears () arranged downstream of the rolling mill are provided for cutting the rod () in sections () of predetermined length (L). The sections () of the rod () are cooled down in a cooling bed ().

Rolling mill with optimized determination of cutting points

A method for operating an apparatus for decelerating and temporarily accumulating a hot rolled long product. The product is deposited on a rotating drum in the form of a helix, and is simultaneously unwound from the drum to a receiving guide movable incrementally along a path parallel to the rotational axis of the drum. Immediately upon entry of the product front end into the receiving guide, the incremental movement of the receiving guide is preceded by an initial rapid shifting through a distance adequate to prevent subsequent product convolutions of the helix from buckling and overlapping.

Method of operating an apparatus for decelerating and temporarily accumulating hot rolled long products

A pinch roll unit for either propelling or retarding a product moving along the pass line of a rolling mill comprises a pair of levers mounted for rotation about parallel first axes. Roll shafts are carried by the levers with each roll shaft being journalled for rotation about a second axis parallel to the first axis of its respective lever. Pinch rolls are carried by the roll shafts and are positioned to define a gap therebetween for receiving the product. An electrically powered first motor operates via a linkage to rotate the levers about the first axes and to move the pinch rolls between open positions spaced from the product, and closed positions contacting and gripping the product therebetween. An electrically powered second motor rotatably drives the pinch rolls.

Growing community of inventors

Shrewsbury, MA, United States of America

Yun Ling