| 摘要 |
PURPOSE:To obtain the optimum load of an O press by detecting the load in the O press, detecting the strength of a material and controlling the O press load by using the calculated value. CONSTITUTION:The information on the load of a U press device 20 in a UOE process is inputted to a control device 10, by which the yield strength is calculated and further the load of an O press is calculated. A pressure control valve 4 is operated in accordance with the calculated load, by which a cylinder 3 is actuated. The actual load in this stage is detected by a load detector 11 and is fed back to the device 10 so that the cylinder 3 is actuated until the set load is attained. The optimum load of the O press is obtd. by such method and the shape defect occurring in the loss load or lack of the load is prevented. |
