公开(公告)号：US4253323A

公开(公告)日：1981-03-03

申请号：US24036

申请日：1979-03-26

申请人： Kinshiro Murakami ,  Atsumu Hakoyama ,  Masakazu Yamazaki ,  Hisanobu Kanamaru ,  Yasushi Ouchi ,  Akira Tohkairin

发明人： Kinshiro Murakami ,  Atsumu Hakoyama ,  Masakazu Yamazaki ,  Hisanobu Kanamaru ,  Yasushi Ouchi ,  Akira Tohkairin

IPC分类号： B21J1/02 ,  B21J1/00 ,  B21K1/00 ,  B22F3/16 ,  B21D22/02

CPC分类号： B22F3/16 ,  Y10T29/49478

摘要： A method is provided for the formation of high precision metal slugs by cold forming. A metal column starting material is subjected to a preforming step in which the starting material is cold forged with a pair of upper and lower metal dies provided with concave recesses to produce a primary product having a barrel shape having a high degree of parallelism on the ends. The resultant primary product is subjected to an upsetting step in which the barrel shape is crushed while maintaining parallelism to obtain a secondary product. The resultant secondary product is then subjected to an ironing step in which the outer diameter of the secondary product is reduced to obtain a high precision slug having an outer diameter which is substantially the same as the outer diameter of the desired final product for which the slug will be utilized.

摘要翻译： 提供了通过冷成型形成高精度金属块的方法。 对金属柱起始材料进行预成型工序，其中将起始材料与设置有凹形凹部的一对上下金属模具进行冷锻，以在端部上产生具有高度平行度的筒形的初级产品 。 对所得到的初级产物进行镦锻步骤，其中在保持平行度的同时将筒形破碎以获得二次产品。 然后对所得的二次产品进行熨烫步骤，其中二次产品的外径减小，以获得高精度的塞子，其外径与期望的最终产品的外径基本相同， 将被利用。