热变形参数对微型齿轮成形影响的实验研究

为了研究凸模速度、成形温度和成形载荷等热变形参数对5A02铝合金微型齿轮成形的影响规律,设计制造了微型齿轮模具,在自行研制的微塑性成形设备上,将压入高度比作为填充程度的评价参数进行了成形实验,成功获得了质量良好的节圆直径为Ф1 mm的5A02铝合金微型齿轮.研究结果表明,压入高度比可以很好地定量表示微型齿轮闭式模锻的填充程度,成形载荷是影响微型齿轮填充程度的主要因素,降低凸模速度、提高成形温度有利于提高微型齿轮的填充程度.

Experimental study on effect of thermal deformation parameters on forming process of microgears

To study the effect of thermal deformation parameters such as punch velocity, forming temperature and forming load on forming process of 5A02 aluminum alloy microgears, a micredie is designed and fabricated and pressing ratio is used as evaluation parameter to indicate compactness. Experiments have been achieved on the Special developed micro-plastic-forming apparatus. 5A02 aluminum alloy microgears of 1 mm in pitch diameter have been fabricated successfully. As a result, pressing ratio indicates the compactness of closed die forging microgear quantitatively. Forming load is the main factor affecting the forming process of a microgear. Decreasing punch velocity or increasing forming temperature makes for improving the compactness of a microgear.