Introduced the characteristics of the gear box case, and determinded the reasonable forming process, designed the drawing die, the trimming die, the piercing die and the flanging die.
结合实际，介绍了带内孔的薄板锻件的工艺难点，并就此工艺难点的解决介绍了锻件切边、冲孔模具的优化设计。
Introduced the characteristics of the gear box case, and determinded the reasonable forming process, designed the drawing die, the trimming die, the piercing die and the flanging die.
结合实际，介绍了带内孔的薄板锻件的工艺难点，并就此工艺难点的解决介绍了锻件切边、冲孔模具的优化设计。
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