ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Single point incremental forming (SPIF) is a relatively new sheet forming process. Asheet is clamped in a rig and formed incrementally using a rotating single point tool in the form of arod with a spherical end. The process is often performed on a CNC milling machine and the toolmovement is programed using CAM software intended for surface milling. Often the functioncalled profile milling or contour milling is applied. Using this milling function the tool only has acontinuous feed rate in two directions X and Y, which is the plane of the undeformed sheet. Thefeed in the vertical Z direction is done in the same angular position in the XY plane along a linedown the side of the work piece. This causes a scarring of the side and also results in a peak in theaxial force when the tool is moved down.The present paper offers a solution to this problem. A dedicated program uses the coordinates fromthe profile milling code and converts them into a helical tool path with continuous feed in all threedirections. Using the helical tool path the scarring is removed, the part is otherwise unchanged and amajor disadvantage of using milling software for SPIF is removed. The solution is demonstrated bySPIF of three different geometries: a pyramid, a cone and a complex part
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.344.583.pdf
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