国内在采用冷挤压工艺生产汽阀弹簧座方面,已经取得了许多宝贵的经验。对于这种中心成锥形孔、外趋为多台阶类型的零件,普遍采用的成形工艺为车削加工棒料或管料成环形毛坯,然后进行镦挤成形。为了进一步发挥冷挤压工艺高效率低消耗的特点,制订两个工艺方案进行试制,最后采用剪切棒料镦挤成形的工艺,并经过批量试制,目前正式投入生产。一、工艺分析 In the domestic use of cold extrusion process to produce spring seat valve, has made many valuable experience. For such a center into a tapered hole, the outer tend to multi-step type of parts, the commonly used forming process for turning bar or tube material into a ring blank, and then forging extrusion. In order to further exploit the characteristics of high efficiency and low consumption of cold extrusion process, two process plans were formulated for trial production. Finally, the process of upsetting and extruding shear bar material was used. After batch trial production, the project was officially put into production. First, process analysis