SeGuruCool
The Largest Independant Solid Edge Resource Outside UGS
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SeGuruCool The Largest Independant Solid Edge Resource Outside UGS |
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www.oocities.org/SeGuruCool  segurucool @ indiatimes.com |
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Why Surface Modeling ? With so much buzz surrounding SE solid modeling, why should anyone bother with surface modeling? Because even with the best of Solid Edge's solid modeling capabilities, there are times only surface-modeling functions can properly shape a part. A little history in general, a little math, and a little comparison between surface and solid modeling can help explain the role of Solid Edge's surface modeling. |  |
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A little History Surface modeling was developed in the automotive and aerospace industries in the late 1970s to design and manufacture complex shapes. Nurbs : Nonuniform Rational B-splines and cubic-surface formats appeared early and remain the primary spline and surface formats used throughout the CAD industry. Surfaces can be used to design structural elements which conform to the shape of aerodynamic and ergonomics parts. |  |
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A little Maths Nurbs and cubic formats are represented in a computer by polynomial equations generated by a CAD system, and onscreen through the location and shape of curves and surfaces. For example, the equation of a line, a first-degree polynomial, has this form Y = ax + b The equation for a parabola, a second-degree polynomial, has the form Y = ax2 + bx + c And the equation of a cubic spline, a third-degree polynomial, looks like Y = ax3 + bx2 + cx + d The more terms in the polynomial equation, the more "shape" the curve or surface has. |  |
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Under the Hood The data structure of a Nurbs curve or surface is comprised of points, weights, and parameter values that define a control net which is tangent to the curve or surface. The control net on a Nurbs surface is a rectangular grid of connected straight-line elements which define the tangency of the surface at positions along the control net. The points in the database which describe the control net are not actually on the surface, they are at the vertices of the control net. Weights in the Nurbs data structure determine the amount of surface deflection toward or away from its control point. |  |
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Solid Edge is good at surface modeling A good CAD system shields users from having to know too much about the mathematics that represent the underlying surfaces - Solid Edge does this very eficiently. In addition, surface modelers should: Provide enough tools to completely define any feature on the part using surfaces. - Solid Edge has it. |  |
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The BlueSurf command is your friend A good CAD system should have many functions for defining the different shapes of surfaces including extruded, revolved, swept, offset and curved boundary. - Solid Edge has them all and more. The lofted surface should allow for the input of cross-section curves or for the input of curves both along and across the surface - Solid Edge achieves this using the revolutionary BlueSurf. |  |
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Solid Edge has Robust Surfacing Support Tools A good CAD system should support functions such as surface trimming, extending, intersecting, projecting and editing. - Solid Edge has them all and are easy to use. |  |
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Why Wait ? With Solid Edge furnishing a plethora of surfacing tools and SeGuruCool offering plentiful of hands-on, severely indepth, click-by-click tutorials on Solid Edge surfacing, join the surfacing bandwagon and .... enjoy ! Note : Most Solid Edge Surfacing features were introduced to me by the Solid Edge Surfacing maestro Adrian Menezes. | |
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Tushar Suradkar segurucool @ indiatimes.com |
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