CAD/CAM, Maths, Engineering , exercise .test. sample, Exercises of Computer Aided Design (CAD)

Download CAD/CAM, Maths, Engineering , exercise .test. sample and more Exercises Computer Aided Design (CAD) in PDF only on Docsity! Nv What are the major steps of computer assisted part programming using the APT language? What is the function of a post-processor in computer assisted part programming? Why the development of a post-processor is a difficult task and how it could be tackled? What are the key parameters for machining accuracy control? Provide a brief definition for each of the parameters, and explain how each of the parameters affect the resulting surface afier machining? In a Cutter Location file (CLDATA), most of the statements are point to point movement defined by What are the definitions of the above parameters for the GOTO statement? Use hand drawings to indicate and explain the parameters for (a) a ball nose cutter, (b) a flat end cutter, and (c) a torus cutter. A Bézier surface Q/i,v) is defined by nm OWMv)= YY B,COK, ,O,, ; O<usl, O<vs1 10 J=0 where I); are the control vertices, (n\ , ' m) =i B,.(w) =| "ye (=u; K,,0)=( ; rane : & J ys \ are basis functions with (a) With fixed parameter w= w,, the surface path PO) = O0ty.v) = OV), _, can be defined as a Bézier curve. What is the degree of the resulting Bézicr curve P(v)? Symbolically derive explicit representations of the resulting Bézier curve P(v)and its control vertices. (b) Symbolically derive the unit normal vector N of the surface Q(w,v) at corner position (2,v) = (1,0). 5. Define the geometry of a cup model as a single NURBS surface (or two) by rotating the profile curve shown on the next page about the vertical y-axis. (a) You may first define the profile curve as a single NURBS curve (or two), and then (b) rotate the profile curve(s) about the vertical axis for obtaining the rotational surface. See next page for a sketch of the profile curve positioned on the xy-plane. Use the coordinate system shown in the illustration. For presenting the final solution, use hand drawings to illustrate the parametric directions of the profile curve and the resulting cup model surface(s). Provide full details for the definitions of the NURBS curve(s) and the NURBS surface(s), including the respective equations, order(s), number(s) of control points, knot vector(s). and the set of properly ordered control points. The main dimensions of the cup model are as follows: DI ~ 120mm D2 = 100mm D3 = 60mm Hl = 80mm H2 = 25mm Rl =R2= 15mm