| 摘要 |
PURPOSE:To improve dimensional accuracy of a product by determining rolling load by a specific rolling load equation, setting roll gap and rolling a steel pipe. CONSTITUTION:Rolling load is determined by the equation I which is a rolling load equation and the roll gap in the stage of rolling is set at an optimum gap by said rolling load in sizer rolling of a seamless steel pipe after heat treatment. In the equation I , P: rolling load ton, Km: average deformation resistance kg/ mm.<2>, ld: the projected contact length taking the influence of elastic deformation into consideration mm., Dm: average outside diameter on the inlet side mm., t: the wall thickness on the inlet side mm.. |
