| 摘要 |
PURPOSE:To reduce manhour of working by forming a recess in a flat plate stock by the tip having a recessed part of a mandrel corresponding to inner diameter of the barrel and a hemispherical die having a projected part, forming the barrel by rotation of the mandrel and shifting of a spinning roller and forming the barrel of a recessed and bottomed pressure container. CONSTITUTION:A flat plate stock is held between the tip having recessed part of a mandrel X corresponding to inner diameter of the barrel and a die K having hemispherical projected part, and a recessed part is formed in the stock by pressure of an oil pressure cylinder YC. By rotation of a motor M supported by the mandrel X and joints BB, F, R of the die K and shifting of a spinning roller SR in longitudinal direction, projecting part of the stock is drawn to form the barrel A2. Thus, the bottom and barrel of the pressure container is formed from a flat plate stock by loading of one time to reduce manhour and lower the prime cost. |
