具有特殊斜面的冲压件展开尺寸计算在众多的冲压工艺书籍和模具设计手册中鲜有论述，在实际工作中是个难题。
Calculation of development size of pressing with special incline is not discussed in many press technology books and die design manuals, and it is a difficult problem in real working.
分析了装货口盖成形工艺性，并进行了理论计算和模拟验证，由此制定了该工件的成形工艺、模具设计方案。
The porthole cover forming technology has been analysed and theoretical calculation and simulation verification have been done hence scheme of forming technology and die design done.
研究了工艺参数选择计算、模具设计和质量控制。
The selection and calculation of process parameters, die design and quality control are studied.
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