Patent ID: 6266987
Filing Date: 2001-07-31
Classification: B21B

Abstract:
A disk roll exchanging apparatus for use in a vertical piercing mill containing a mill housing having a pair of vertically opposed piercing rolls disposed on opposite sides of a pass line of the material to be rolled, and a pair of opposed disk rolls on opposite sides of said pass line perpendicularly disposed with respect to said piercing rolls, said disk roll exchanging apparatus comprising:a pair of disk frames each being operative to support each of said disk rolls, each of said disk frames being pivotally supported on said mill housing by a pivot shaft to enable opening of said disk frames away from the pass line,said disk rolls each containing a shaft and chocks supporting said shaft at opposite ends thereof,a disk roll lifting device operative for mounting and demounting said disk rolls with respect to said disk frames, said disk roll lifting device containing a chock rest for supportedly receiving one of said chocks, and an upper chock holder movably disposed on said lifting device and operative to supportedly engage the other of said chocks and to retain said other chock in aligned relation with respect to said rest-supported chock,a moving device carrying said disk roll lifting device, andmeans for horizontally moving said moving device to permit mounting and demounting of said disk roll with respect to said disk frame.