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21. 发明授权

US4611482A Closed die forging apparatus 失效
标题翻译：封闭模锻设备
公开(公告)号：US4611482A
公开(公告)日：1986-09-16
申请号：US640271
申请日：1984-08-13
申请人： Hirofumi Hara
发明人： Hirofumi Hara
IPC分类号： B21J5/02 , B21J9/02 , B21J9/20 , B21D22/00
CPC分类号： B21J5/02 , B21J13/025 , B21J9/02 , B21J9/027 , B21J9/20
摘要： A closed die forging apparatus has a fixed bottom die, and a top die at the bottom end of a piston rod depending from a top die carrier rigidly mounted to the underside of a ram. The top die carrier has defined therein a hollow in which a piston is received for up and down motion relative to the top die carrier, with the piston having the piston rod extending downwardly therefrom. A fluid chamber over the piston communicates with a parallel connection of low pressure and high pressure accumulator systems for successively storing the energy of the fluid in the fluid chamber which is pressurized as the ram decends further after moving the top die into contact with the bottom die. The apparatus may further comprise at least one side punch which is forced into and out of the die cavity by an actuating lever acted upon by another fluid cushioned piston built into the top die carrier. A second fluid chamber over this second piston also communicates with an accumulator which stores the fluid pressure developed as the ram descends further after the side punch has been forced fully into the closed die cavity for forging the metal confined therein.
摘要翻译：封闭的模锻装置具有固定的底模，以及活塞杆底端的顶模，其从刚性地安装到冲头的下侧的顶模托架垂下。顶部模具托架在其中限定有中空部，活塞在其中被容纳以相对于顶部模具托架上下运动，活塞具有从其向下延伸的活塞杆。活塞上方的流体室与低压和高压蓄能器系统的并联连接，用于连续地将流体的能量存储在流体室中，该流体腔中的流体室中的能量随着压头在移动顶模与底模。该装置还可以包括至少一个侧冲头，其通过由内置于顶模承载件中的另一流体缓冲活塞作用的致动杆而被迫进入和离开模腔。在该第二活塞上方的第二流体室还与储存器连通，储液器存储当冲头已经被迫完全进入封闭模腔中锻造被限制在其中的金属时，冲头在进一步下降时存储所形成的流体压力。

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