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Development of servo-type micro-hydromechanical deep-drawing apparatus and micro deep-drawing experiments of circular cups

机译:伺服式微液压机械拉深机的研制及圆杯的微拉实验

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摘要

A micro-hydromechanical deep-drawing (MHDD) apparatus for manufacturing a micro-complex-shape components and increasing of drawn cup accuracy has been developed in this study. This apparatus with simple tooling structure and forming process can achieve high dimensional accuracy using servo press mechanics with a double-action type, one-stroke forming process without transferring and positioning, force control, and fine flow rate control of the pressure medium. The developed MHDD apparatus can prevent wrinkling by applying an appropriate constant gap and Stably generate the counterpressure. Micro drawn cups of 0.8 mm diameter are successfully fabricated. Also, the effects of counterpressure on drawability and dimensional accuracy at the bottom of the cup are investigated for phosphor bronze, stainless-steel, and pure titanium foils with a thickness of 50 mu m. The appropriate counterpressure applied in MHDD can eliminate wrinkling and reduce the frictional drawing force. It is concluded that the forming limit and dimensional accuracy can be improved by MHDD.
机译:在这项研究中,已经开发出一种用于制造微复杂形状部件并提高拉深杯精度的微液压机械深冲(MHDD)设备。这种具有简单的工具结构和成型工艺的设备可以使用具有双作用类型的伺服压力机技术,一冲程成型工艺来实现高尺寸精度,而无需进行压力介质的传递和定位,力控制以及精细的流量控制。发达的MHDD设备可通过施加适当的恒定间隙来防止起皱并稳定地产生反压。直径为0.8毫米的微拉杯已成功制造。此外,对于磷青铜,不锈钢和厚度为50μm的纯钛箔,研究了反压对杯底可拉伸性和尺寸精度的影响。在MHDD中施加适当的反压可以消除皱纹并减小摩擦拉力。结论是,MHDD可以提高成形极限和尺寸精度。

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