The interest towards magnesium (Mg) alloys for the fabrication of light weight components has been continuously increasing, especially for transportation, since the payload is strictly related to the energy (fuel or electricity) consumption. Super plastic forming (SPF) and single point incremental forming (SPIF) are viable processes for manufacturing light weight parts since they allow to produce components with superior characteristics and quite complex geometries, even in the case of the poorly formable Mg alloys. But, since both the processes are characterized by stretching, thinning is a key issue to be addressed. On the other side, in order to fulfil the structural and corrosion resistance characteristics required by aerospace and automotive applications, components with a uniform thickness distribution have to be produced. Such an aspect is even more important when the shape complexity of the component increases. SPF and SPIF have never been combined or hybridized so far but, in order to produce parts with a uniform thickness distribution, a possible strategy based on the blank pre-forming by SPIF prior to the SPF has been proposed in the present paper. In particular, the initial blank shape to be obtained by SPIF was designed using a numerical optimization approach and effectively created using the sine law to predict the wall angle and design the tool path. A hemispherical component in AZ31B-H24 was used as case study. The thickness profile of the component obtained by SPF revealed to be highly uniform in a large area (the portion from the centre of the sample to its periphery corresponding to about 70%) being characterized by a thickness equal to about 0.5 mm. The quality in terms of finishing of the component produced by SPF resulted to be good, irrespective of the roughness increase exhibited by the blank after the pre-forming by SPIF.

由于有效载荷与能源（燃料或电力）消耗严格相关，因此对于制造轻质部件的镁（Mg）合金的兴趣一直在不断增加，特别是对于运输。超塑性成型（SPF）和单点增量成型SPIF（SPIF）是制造轻质零件的可行方法，因为即使在可变形性差的Mg合金情况下，它们也可以生产出具有优异特性和相当复杂几何形状的零件。但是，由于这两个过程都具有拉伸特性，因此减薄是需要解决的关键问题。另一方面，为了满足航空航天和汽车应用所需的结构和耐腐蚀特性，必须生产具有均匀厚度分布的组件。当部件的形状复杂性增加时，这一方面甚至更加重要。迄今为止，SPF和SPIF从未进行过组合或混合，但为了生产厚度分布均匀的零件，本文提出了一种在SPF之前基于SPIF的空白预成型的可能策略。特别是，使用数值优化方法设计了通过SPIF获得的初始毛坯形状，并使用正弦定律有效地创建了预毛坯形状，以预测壁角并设计刀具路径。案例研究了AZ31B-H24中的半球形组件。通过SPF获得的部件的厚度轮廓显示出在大面积（从样品的中心到其周边的部分对应于大约70％）中高度均匀，其特征在于等于大约0.5mm的厚度。无论用SPIF进行预成型后坯料呈现出的粗糙度增加如何，用SPF生产的组件的精加工质量都得到了良好的评价。通过SPIF获得的初始毛坯形状是使用数值优化方法设计的，并使用正弦定律有效创建，以预测壁角并设计刀具路径。案例研究了AZ31B-H24中的半球形组件。通过SPF获得的部件的厚度轮廓显示出在大面积（从样品的中心到其周边的部分对应于大约70％）中高度均匀，其特征在于等于大约0.5mm的厚度。无论用SPIF预成型后坯料表现出的粗糙度增加如何，用SPF生产的零件的精加工质量都很好。通过SPIF获得的初始毛坯形状是使用数值优化方法设计的，并使用正弦定律有效创建，以预测壁角并设计刀具路径。AZ31B-H24中的半球形组件用作案例研究。通过SPF获得的部件的厚度轮廓显示出在大面积（从样品的中心到其周边的部分对应于大约70％）中高度均匀，其特征在于等于大约0.5mm的厚度。无论用SPIF预成型后坯料表现出的粗糙度增加如何，用SPF生产的零件的精加工质量都很好。