| 摘要 |
PROBLEM TO BE SOLVED: To provide a blanking method for reducing a noise by using a servo press when blanking an austenitic stainless steel sheet. SOLUTION: The blanking is carried out at the predetermined blanking speed with the conditions of the material and the shape of a die and a punch, a die clearance, a plate holder and a lubrication condition made the same as those of the actual blanking conditions. After measuring the distance from the blanking start position at which the punch is firstly brought into contact with an austenitic stainless steel plate to be blanked to the breaking position, the blanking speed is increased till immediately before the punch reaches the distance from the blanking start position to the breaking position under the actual blanking condition, and the blanking speed is decreased thereafter. COPYRIGHT: (C)2011,JPO&INPIT |
