Oil Lubrication Effected On Roughness And Profile Error In Single Point Incremental Forming Product

Abstract

The single point incremental forming process (SPIF) is a novel, economy and flexibility process, which suited for sheet metal prototyping, customized product with complex shapes and low volume sheet metal product applications, because it’s lower cost process which can produced sheet metal part without any used of die. They used a simple tool consist of rotating forming tool with hemispherical end, fixture and CNC milling machine. The process principle is producing a series of locally deformed on a sheet metal blank by a hemispherical tool that press and travel on the blank follow the CNC toolpath to form a complex sheet metal component shape. Then it’s comfort to adjust the part’s geometry by changing toolpath. The purpose of this research work is to study the influence of oil lubricant on the SPIF process parameters that affected to the surface roughness of St 37 steel by SPIF. The various combinations of oil and process parameters such as feed rate, step size, step depth, speed and tool radius were employed. The 2k factorial experiment design and Response surface methodology (RSM) design was applied to develop a mathematical model of the above parameter combination on the surface quality of the formed part. The surface roughness of formed parts was measurement by a surface roughness meter and the profile was measurement by optical 3D scan.