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Optimization of Incremental Forming of Low‐Alloy High‐Yield‐Strength HC300LA Sheet Using a Rolling Blank Holder Method
Author(s) -
Taşdemir Vedat
Publication year - 2021
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.202000512
Subject(s) - blank , sheet metal , materials science , spring (device) , surface roughness , deep drawing , incremental sheet forming , die (integrated circuit) , composite material , surface finish , point (geometry) , yield (engineering) , alloy , mechanical engineering , structural engineering , metallurgy , geometry , engineering , mathematics , nanotechnology
Incremental sheet metal forming is a method that enables the fast and flexible production of complex geometric parts using a very simple set of forms. However, this method presents some problems including wall thickness and spring‐back. Different methods are developed to solve these problems. One of these, the rolling blank holder method, is applied in this study using a 1 mm‐thick HC300LA sheet. The effects of holding pressure, increment size, forming tool diameter, and feed rate parameters on spring‐back, wall thickness, surface roughness, and forming force are investigated in the experiments conducted using the two‐point incremental forming‐rolling blank holder (TPIF‐RL) sheet‐forming method. The effects of the selected parameters are optimized using response surface methodology. As a result of the study, it is determined that the most important parameter for surface quality and wall thickness is the forming tool diameter, the most effective parameters for forming force are the forming tool diameter and increment size, and for spring‐back the dominant parameters are forming tool diameter, holding pressure, and increment size. The spring‐back angle increases with increasing forming tool diameter, holding pressure, and feed rate. In addition, both spring‐forward and spring‐back are observed in the formed parts.