Presentation on theme: "A Study of Fixture Layout and Clamping Force for a Ti-6Al-4V Disk in a Vertical Turning Lathe Numerically Controlled Machine Maureen Fang Sept 17, 2009."— Presentation transcript:
1A Study of Fixture Layout and Clamping Force for a Ti-6Al-4V Disk in a Vertical Turning Lathe Numerically Controlled MachineMaureen FangSept 17, 2009
2Overview Vertical Turning Lathe (VTL) Machine Fixture-Disk Assembly Cutting ForcesFinite Element Models in ANSYSInitial Fixture LayoutDeflections within DiskQuestions
9Cutting Forces Tangential Force Orthogonal Cutting Results are generated by Matlab codes for both oblique and orthogonal cuttingOrthogonal cutting has only two cutting forces componentsTangential force is the dominate component.Tangential ForceOrthogonal Cutting
10Finite Element Model in ANSYS Number of elements32000Number of Nodes38720Degree of Freedom per Node6Type of ElementsBrickMaterial of WorkpieceTi-6Al-4VModulus of Elasticity110 GPaPoisson Ratio0.34
11Clamps, Locators, and Cutting Forces applied to Initial Fixture Layout Locators are constraint in 3 axisClamping Force = 1500N
12Deflections within a Finish Cut The “U” shape curve presents the magnitude of deflection changes as the cutting tool travels from the top to the bottom surface of the disk.The displacement vector sum is largest at the top.The subsequent models will have the cutting forces applied at the top surface.
13Key Locations to Represent a Dynamic Machining Process ANSYS model is static analysis of a dynamic process. Therefore, selected cases are used to represent snap shots of the overall machining process.Point A, B, and C are key locations of disk where cutting forces have been applied, as disk rotates.