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Unformatted text preview: product z t ∧ x t (figure 4a). The tool is then divided into a set of independent cutting edges and a coordinate system k k k R e (Oe , x e , y e , z e ) is associated to each of them. Parameter k represents the edge number. Direction z e is taken collinear to the tool axis. Both points O t and Oe are
k equivalent. These two elements are the same for each cutting edge. The axis x e is located in the bottom plane O t x t y t of the tool and rotated of an angle to x t . Finally, k the geometry of a cutting edge is described in its corresponding plane Oe x e z e , by a function f(x) that will associate to each range x ∈ [rmin , rmax ] a corresponding coordinate z. For most tools the function f can be defined by three intervals as shown in figure 4a.
Figure 4a: Tool representation
zt = ze rmin yt
zm Ot = Oe αk
Figure 4b: Kinematics representation zp = zt zp Oh Oh Op Op yp xt xp rmax f(x) M xm xek xt
xp yp yt Ot Figure 4; Representation of the cutting edge and the machining kinematics. 3.3. Kinematics of the milling machine The link between the tool and the coordinate system of...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.
- Spring '10
- The Land