高液压射台前板球墨铸铁件铸造工艺设计

Casting Process Design of Ductile Iron Castings for the Front Plate of High Hydraulic Shooting Table

射台前板是注塑机中的关键部件之一,其油缸孔部位加工精度高且有承压要求。本文介绍了高液压球墨铸铁射台前板铸件的工艺难点,设计了分型方案、浇注系统及冷却系统,并借助软件模拟分析了缩孔与缩松缺陷,确定了型芯方案。通过合理选择铸件的化学成分,严格控制球化、孕育及浇注过程,铸件本体渗透检验(PT)达到EN1371标准的质量等级I级,附铸试块铸件的力学性能和金相组织均符合客户标准。

The front plate is one of the key components for the injection molding machine.The oil holes on the front plate have high precision machining and the requirements of enduring high oil pressure.In this paper,the key points have been discussed in the production of high-hydraulic-pressure ductile iron casting.The process scheme of the partition,gating system,and cooling system are presented.The core scheme is determined through simulation software to avoid shrinkage and porosity defects in the casting.By reasonably selecting the chemical composition of the casting as well as strictly controlling the spheroidization,inoculation,and pouring processes,the casting body penetration test(PT)reached quality grade I of EN 1371.The mechanical properties and metallographic structure of the cast test block meet the requirements of customer′s standards.