Influence of Machining Parameters on the TPIF Formability for Aluminum Sheet at Room Temperature

Two Point Incremental Forming (TPIF) technology is very flexible forming technology, cost-effective, and potential advantages (high flexibility, simplicity, less-time consumption). This technology uses a hemispherical-end tool controlled by CNC milling machine to deform a metal sheet which is fixed on the jig/fixture. The jig/fixture is firmly positioned on the CNC milling machine table which includes clamped plate, movable plate base plate and semi-support. The metal sheet material is clamped between movable plate and clamp plate by 8 bolts and can move down along 4 guide bars. The sheet material is deformed layer by layer by the hemispherical-end tool following CNC tool path. This paper aims influence of machining parameters on the formability of aluminum sheet at room temperature which is deformed by TPIF technology. The investigated parameters are depth step, feed rate, tool diameter, and spindle speed through Design of Experiment (DOE). The formability has been known the ability of metal sheet to deform until happen failure through the achieved forming angle.