126 Development of Friction Stir Incremental Forming Process and Its Application to Forming of Magnesium Alloy Sheets

A Study on the Warm Incremental Forming Limit of AZ31B Sheet

“…The single point warm incremental forming technique is a die-less warm forming technique, which realizes successive partial plastic forming of sheet metal by heating the sheet to a certain temperature with certain methods and forming a 3D envelope layer-by-layer with numerical control procedures controlling simply-shaped forming tools [2][3][4][5] . The warm incremental forming technique has been used gradually in the field of magnesium alloy sheet forming and attracted great attention of scholars at home and abroad who have carried out some studies.…”

“…Cone-shaped part of various inclination angles were successfully formed on this basis [3] . With the approach of incremental forming of frictional heating, Otsu M formed AZ31, AZ61 and AZ80 pyramid box-shaped part by adjusting the principal axis speed, the feed speed and the size of forming angle, the minimum semi-cone angles of which are respectively 25°, 30° and 40° [4] . Domestic scholars have also carried out some studies on the incremental forming of magnesium alloy.…”