Mastering Surface Modeling With SOLIDWORKS 2020

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Mastering SurfaceModeling withSOLIDWORKS 2020 Basic through Advanced TechniquesLani Tran, CSWESDCP U B L I C AT I O N SBetter Textbooks. Lower Prices.www.SDCpublications.com

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Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to SurfacesChapter 1: Introduction to SurfacesSolids or Surfaces – What is the difference?1. Solids vs. Surfaces:In SOLIDWORKS, both solids and surfaces are known as Solid Bodies and SurfaceBodies. They are advanced tools used to easily create complex geometry. These twoentities are very similar and may even be considered the same.Solid Bodies and Surface Bodies are made up of two types of entities: Geometry andTopology. Geometry represents shapes such as a surface, curve, line, arc, spline or apoint. Topology describes a relationship such as a face, an edge, or a vertex, whichconnects or forms an opened or closed boundary.The images below display two different objects that appear to be different at firstglance. Geometrically they are not quite the same. However, topologically, they arealike. Both objects have eight vertices, six faces, and twelve edges.SOLIDWORKS creates surface bodies by forming a meshof curves called U-V curves. The U curves run alonga 4-sided surface and are shown in the magentacolor. The curves that run perpendicular tothe U curves are called the V Curves, andthey are shown in the green color.Certain commands may offerthe preview mesh where thesecurves are also displayed.U CurvesV Curves1-1

Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to Surfaces2. Patching with continuity:Blending issues may often arise when creating or patching with surfaces. Thethree examples below showcase the common examples of patches frequentlyfound in design work.Contact: (also called C0 Continuity)The yellow surface is in contact with the graysurface. They both share a common edge.Tangent: (also called C1 Continuity)The yellow surface is in contact with the graysurface. They share a common edge and are alsotangent to each other.Curvature Continuous: (also called C2 Curvature)The yellow surface is in contact with the graysurface. They are tangent and share the samecurvature.Each of the blend types has its own features to assist designers in creating theright patch for a surface model. Though every model may have unique needs,these options will provide a smooth transition between two surfaces.1-2

Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to Surfaces3. When to use surfaces:Although surface models can be more difficult to create than solid models,solid models may not be enough for all designs. This is where surfacingbecomes useful with the important tools to fill in those gaps.When determining whether to use solid features or surface features, it ishelpful to remember that shapes which can be easily made with the Extrude,Sweep, or Loft commands should be made as solid features. These shapes willfrequently require more than one side to be created at the same time whileresiding within the same feature.A surface model, on the other hand, iscreated by constructing one surface at atime. This way, different methods andtechniques may be used to create thesurfaces, one side at a time. The surfacemodel shown on the right is a primaryexample of an instance where surfacesshould be used.Surfaces can be used as reference geometry in order to assist with theconstruction of a model. The surfaces will then be moved into a SurfaceBodies folder and become hidden when the model is complete.4. When not to use surfaces:Shapes that can be created as one feature along one direction, such as blocksand cylinders, should be made as solid features.Solid features take less time to make. Generally, the final design of a modelshould be a solid model. This is because a solid model can have a materialassigned to it, can be analyzed to simulate future issues, and can be used tocreate production drawings.It is a best practice to combine both solid and surfacing tools (HybridModeling) in order to take advantage of all the tools available and useSOLIDWORKS’ powerful features to their fullest extent.1-3

Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to Surfaces5. The Spline handles:When creating the surfaces, the Spline tool is often used to create complexcurves. This is because it can produce a higher quality curve than otheravailable tools.Spline can be modified using several controls, including spline points, splinehandles, and control polygons. A single spline can have multiple throughpoints and spans (the region between through points). Further, curvatureconstraints can be applied at each endpoint. At each through point, thetangency vector may be weighed and the tangency direction controlled.Spline handlesEach Spline includes a setof tools to assist with themanipulation of its curvature.These tools are: Curvature CombsSpline HandlesInflection PointsControl PolygonsTangent RadialHandle (Rotate)Tangent MagnitudeHandle (Translate)Both, Translate &Rotate HandleInflection PointCurvatureCombsSpline Handles1-4Control Polygon

Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to Surfaces6. Check your surface model frequently:Unlike solid features in which one feature may have multiple sides (i.e. anextruded block has six sides, extruded in one direction), surface models arecreated one face at a time in order to complete each side of the model.Further, surface models are not frequently verified like solid features.These surfaces may have small gaps or overlapping elements that are difficultto spot. Therefore, it is important to check your surface model for errors aftereach feature is built.The Check (or Check Entity) command, under the Evaluate tab, functions as atool to check surface models and identify geometry issues. If gaps or overlapsexist in the model, the system will prevent the surfaces from knitting into asolid model. It is a best practice to check your model often to reveal any errors.Shortcuts (or hotkeys) are oftenused to regenerate the surfacemodels.The hotkeys Control B willrebuild only the new features andtheir related children, while Control Qwill force a complete rebuild of all featuresin the model.1-5

Mastering Surface Modeling with SOLIDWORKS 2020 I Introduction to Surfaces7. The best approach:Combining solid and surface tools is the best approach to creating your model.Fully utilizing the collaboration of these tools allows for complex geometry andthe optimization of different techniques. Techniques such as using a surfaceto trim a solid, replacing a surface with a different surface, or splitting a solidbody into multiple solid bodies, can be necessary to finalize a model.This unique approach is called Hybrid Modeling, which is a preferred methodfor most advanced SOLIDWORKS users. The approach, along with othertechniques, will be discussed throughout this book when creating the surfacemodels covered in these lessons.A few important factors to keep in mind fromthis chapter as we progress through theproceeding lessons:Solid features are more efficient to use on simpleshapes and models. Surface features should be usedfor complex shapes and models.Surface features take longer to construct andshould be checked frequently for errors.After all surfaces are created, they shouldbe knitted into one enclosed volume thenthickened into a solid model. By turningthe surface model into a solid model, wecan now analyze for potential issuesand create drawings.1-6

SOLIDWORKS creates surface bodies by forming a mesh of curves called U-V curves. The U curves run along a 4-sided surface and are shown in the magenta color. The curves that run perpendicular to the U curves are called the V Curves, and they are shown in the green color. Certain commands may offer the preview mesh where these

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3. Mastering Tips 3.1 what is mastering? 3.2 typical mastering tools and effects 3.3 what can (and should) be fixed/adjusted 3.4 mastering EQ tips 3.5 mastering compressor tips 3.6 multi-band compressor / dynamic EQ 3.7 brickwall limiter 3.8 no problem, the mastering engineer will fix that!

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