AZ31B镁合金轴对称件单点无模温渐进成形新工艺规律

Rules of New Single Point Incremental Forming without Mould for AZ31B Magnesium Alloy Axisymmetric Parts

摘要:

研究并掌握镁合金板材在不同工艺参数条件下的渐进成形规律对完善镁合金单点温渐进成形工艺有着重要的理论和实际应用价值。以变锥角圆台件为研究对象，以有限元软件ANSYS/LS-DYNA为工具，以成形件的等效应力、减薄率和板厚变化为研究指标，研究了不同工艺参数：成形温度、摩擦条件和工具头直径对AZ31B镁合金板材单点温渐进成形的影响。结果表明：在成形温度为250 ℃，静摩擦系数为0.2、动摩擦系数为0.1，工具头直径在10~12 mm范围内，AZ31B镁合金板材具有良好的单点渐进成形性能。

Abstract:

It is very important to study and master the rule of incremental forming of magnesium alloys under different process parameters for theoretical and practical application. Therefore, the effects of different possessing parameters including the forming temperature, friction condition and the tool head diameter on the hot single point incremental forming of AZ31B magnesium alloys were studied using the variable angle cone piece as the research object, and the parts’ effective stress, as well as the max thickness reduction ratio and thickness changes as research target by the finite element software ANSYS/LS-DYNA. The results show that the AZ31B magnesium alloy exhibits good single point incremental forming ability when the forming temperature is 250 oC, the static friction coefficient 0.2, the kinetic friction coefficient 0.1 and the tool head diameter in the range of 10~12 mm.