Spindle speed effect on the ISF processing of materials with different thermal conductivities

Incremental sheet forming ( ISF) is an advanced forming technology with high flexibility and excellent adaptability. However, conventional ISF encounters challenges in processing of hard-to-deformed materials at room temperature. To address this problem, friction stir incremental forming (FSIF) has been introduced to improve material formability at high temperatures. The aim of this work is to investigate the spindle speed effect on the forming quality for materials with different thermal conductivities by using an experimental and FE simulation. The experimental results presented the combined effect of spindle speed and conductivity on the springback and surface finish of AA1050 and CP Ti Grade 1. A good agreement was obtained in the temperature increase and distribution from experimental testing and FE simulation.