Patent ID: 6510721
Filing Date: 2003-01-28
Classification: B21B

Abstract:
A rolling mill comprising:a housing; upper and lower work roll chocks forming a pair supported by the housing; upper and lower work rolls forming a pair opposed to each other and having shafts rotatably supported by the upper and lower work roll chocks; screw down means provided in an upper portion of the housing, the screw down means effective to apply a predetermined pressure to the upper work roll; first upper and lower support means forming a pair provided on one side in a transport direction of a strip material in the housing, the first upper and lower support means effective to support the upper and lower work roll chocks; and second upper and lower support means forming a pair provided on an opposite side in the transport direction of the strip material in the housing and the second upper and lower support means effective to support the upper and lower work roll chocks, wherein one of the first support means and the second support means is mechanical thrust means, while the other of the first support means and the second support means is hydraulic thrust means, and contraction portions are provided in hydraulic supply and discharge pipes of the hydraulic thrust means.