camiseta del real madrid 2011

camiseta del real madrid 2011, A functionally gradient ceramic tool of three-dimensional calculation model of mechanical stress
????Functionally gradient ceramic tools because of its composition changes in the distribution of a certain gradient, so under the conditions of high speed cutting ability of the anti breakage than ordinary ceramic tools has improved significantly. But in low speed cutting, functionally gradient ceramic tool capacity and resistance to breakage than ordinary ceramic tool is not much advantage. Small low-speed cutting thermal stress, mechanical stress is the main tool breakage. Camiseta Real Madrid Niños , Finite element method by cutting the time of the analysis of functionally gradient ceramic tools can be obtained and the mechanical stress.
????Figure 1 shows the calculation model for the mechanical stress. Place knife blade slot, knife blade bottom surface binding negative z-axis displacement of blade rake face of the plate bound z-axis positive displacement blade, knife blade slot of the two side constraints of x and y to the displacement, surface and bottom knife blade around the plate also limited x-axis and y-axis spin, knife blade around the slot limit the sides of z axis. In this way, the blades 6 degrees of freedom are all bound.
????In the cutting process, the tool cutting forces Fr bear with FZ, Fy and Fx three components. As a result of the finite element method calculation of cutting force to be applied at all nodes, it assumes that the cutting force along the tool - chip contact length direction of the triangle, and along the main and auxiliary cutting edge direction is uniformly distributed. By a document known, SG-4 ceramic cutting tools in machining hardened high carbon tool steel cutting force when the empirical formula for the Fz = 34444ap0. 88f0. 65v-0. 12 (1)
????Assume that FY = 0. 5Fz (2) FX = 0. 8Fz (3) Table 1 of two ceramic cutting tools in a variety of cutting speeds of three-dimensional cutting force component value v (m / min) 50100150Fz (N) 74. 968. 965. 4FX (N) 59. 955. 152. 3FY (N) 37. 534. camiseta del real madrid 2011 , 532. 7
????Table 1 FG-2 functionally gradient ceramic tool (assuming equation (1) ~ (3) also applies to the FG-2) and SG-4 ordinary ceramic cutting tools in a variety of cutting speeds of three-dimensional cutting force component value. Among them, the cutting speed were taken v = 50m/min, v = 100m/min, v = 150m/min, feed rate f = 0. 05mm / r, back knife to eat the amount ap = 0. 2mm, the workpiece material for the T10A (hardness 59. 5 HRC). camiseta real madrid manga larga , FG-2 levels in the physical properties of Table 2 (SG-4 of the physical properties of the first layer of FG-2 the same). .