【摘要】 针对上机匣的成形特点，采用等温锻造工艺方案，并在工艺方案制订及模具结构设计中采取了特殊措施，生产出了合格的锻件。更多还原

【Abstract】 According to the speciality of upper casing,the isothermal forging technology was adopted t0 formingit. Some special measures were adopted in forming procedure and die structure.更多还原