Patent ID: 6412323
Filing Date: 2002-07-02
Classification: B21D

Abstract:
A cross-roll straightener comprising:a frame comprising a lower yoke, an upper yoke, and four vertical columns at corners of a rectangle connected between said yokes; a lower roll mounted on said lower yoke; a roll bed vertically shiftable on said upper yoke; an upper roll mounted on said roll bed and cooperating with said lower roll and having a roll axis crossing a roll axis of said lower roll for straightening stock passed through a gap between said rolls in a feed direction, said roll axes being at an angle to one another about a vertical axis; a spindle and nut device between said roll bed and said upper yoke for vertically positioning said upper roll relative to said lower roll; a respective vertical guide track formed on each of said columns and respective guide surfaces on said roll bed riding on each vertical guide track; a respective adjusting device between each column and the respective guide track, the adjusting devices including a pair of upstream adjusting devices and a pair of downstream adjusting devices with respect to said direction, one of the adjusting devices of each pair being a hydraulic adjusting device with a respective double-acting adjusting hydraulic cylinder and the other adjusting device of each pair being a mechanical adjusting device, said adjusting devices rotating said bed about said vertical axis to vary said angle; and a further double-acting hydraulic cylinder on said upper yoke for applying axial stress to and relieving axial stress on said spindle and nut device.