The hydraulic motor, hydraulic cylinder and oil cup are controlled digitally in the control module.
控制模块对转向器输入端正反转，液压缸的向前、向后加载，内泄油杯放油等数字量控制。
Taking cylinder nut-protected bolt, one of the cup-shaped parts in the forging parts of DF7C gas engine, as an example, the warm extruding is researched, accordingly, the forming die is designed.
以DF7C型内燃机车锻件中的杯形零件之一——气缸螺栓保护螺母为例，进行温挤压工艺研究，并据此设计出了成形模具。
Through theoretical analysis, probability revisal and experimental test, the limit drawing ratio of a tapered cup drawn by cylinder convex punch and tapered concave die is determined in tis paper.
通过理论分析，概率修正和实验验证，确定出利用柱形凸模、锥形凹模一次拉深锥形件的极限拉深比。
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