Abstract
Two Point Incremental Forming technology (TPIF) is one forming method of incremental sheet forming technology (ISF) which is an innovation sheet forming process with potential advantages such as simplicity, less-time consumption, and high flexibility. This technology using a hemispherical-end tool under CNC movement deforms a metal sheet which is fixed on simple frame. The sheet metal clamped between movable plate and clamp plate, under the metal sheet has a support die which is fixed on bottom plate. The lower plate is firmly positioned on the CNC machine table in while upper plate (included sheet material, movable plate and clamp plate) is able to move easily up and down along guide bars. The sheet material is plastically deformed layer by layer until final-shape product by CNC tool path. This technology is very suit for the rapid prototyping process and the low batch production. In this research, formability of the TPIF process due to operating parameters was investigated with aluminum sheet at room temperature. Four operating parameters such as depth step, feed rate, tool diameter, and spindle speed, was considered their effects on the formability of TPIF process through DOE strategy. The forming results showed that TPIF process for metal sheet material at room temperature has potential applicability in the metal sheet-product manufacturing.
Highlights
Incremental sheet forming, an invention of Leszak in 1967, sheet material, has been researched the focus of many studies
Two Point Incremental Forming (TPIF) and Single Point Incremental Forming (SPIF) jig structure differents are a sheet metal of TPIF can move up and down along guide bars, under sheet metal of TPIF has got a support which is fixed died on base plate
Hani Mostafanezhad et al [16] studied experimental study based on response surface methodology (RSM) was carried out to analyze effect of wall angle, tool nose diameter, initial sheet thickness and step down on thinning ratio and forming force during TPIF of AA1050 truncated cone
Summary
Incremental sheet forming, an invention of Leszak in 1967, sheet material (metal and polymer sheet), has been researched the focus of many studies. Were optimate by grey relational analysis with response factors (Min thickness, Springback, Surface roughness) optimize parameters were 15 mm tool nose diameter, 63o wall angle, 800 r/min spindle speed and 0.2 mm deep step with cone shape, analyze formability of aluminum 1050 in TPIF.
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