多軸揺動鍛造の加工特性に及ぼす揺動機構と試片拘束条件の影響

抄録

One of the authors previously proposed a new forging method of using flexible rocking motion. This method reduced the load by nearly 50%, compared with method without the rocking motion. The effects of rocking type and blank holding condition on forgeability were studied in this work. Holding one end of the specimen prevented the specimen from slipping during rocking-die forging under a well-lubricated condition. By reducing the rocking angle and increasing the rocking frequency, forging load was decreased and the flatness of the end of the specimen was improved for every rocking type. Finite element analysis was carried out under the same conditions as the experiments. The numerical results qualitatively corresponded to the experimental results. It was suggested that the rocking motion decreased the contact area, aiding the reduction of load.