ppt on sweep

8/12/2019 Ppt on Sweep

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Cadd supporters

Ashok kammili


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A sweep is created by defining two sections. Thefirst section is the trajectory and the second is thecross-section. Sweeps can be used as forms forprotrusions, cuts and slotsTypes :

Protrusion: Add the material to trajectory.Thin Protrusion: Add the material to trajectory withthickness.Cut: To remove the material with respect totrajectory.Thin Cut: To remove the material with respect totrajectory with thickness.


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First create solid in part.


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Thin protrusion Cut

SurfaceThin Cut


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Definition: Blend feature are composed of two ormore section that joined through transitional facesat their edges so as form a continuous feature. Thenumber of entities in each section that creates the

blend feature should be the same.Example :You cannot blend a circle with rectangle. This isbecause a rectangle is composed of four entities

and a circle of one. It can be achieved only if thecircle is divided into four entities.


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ParallelRotationalGeneral


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ParallelParallel blends have section that are drawnparallel to each other with specified distancebetween them .


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The Rotational blends have sections that arerotated about the Y-axis up to a maximumof 120-degrees and the distance between

two sections is measured from the co-ordinate system. Between each section, anangle called the rotational blend angle.

Rotational Blend


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Each section of the blend feature must have anequal number of entities. However you can use theblend vertex option if the number of entities in allsection are not equal.Example:To create a blending between a rectangle and atriangle, add a blend vertex on a point other thanstart point of the triangle.


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The Swept blend tool is a combination of sweep andblend. The sweep feature needs a trajectory alongwhich the section is swept. Similarly, to createparallel blend, you need to have more than one

section, which have the same number of entities.Application :A swept blend is used when you must blend together

several sections, but the path that the blend takes

must follow a specific trajectory. It is sort of acombination between a general blend and a sweepfeature.


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Swept Blend OptionsNormal to Trajectory :Keeps the features cross sections normal to a

selected trajectoryNormal to Origin Trajectory :

Keeps the features cross sections normal to thedefined origin trajectory

Pivot Direction :Keeps the features cross sections normal to a selected

planar pivot plane, edge, curve, or axis


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Difference between blend and

swept blendThe two Pro Engineer Surfaces can createvery different results. A blend is an extruded featurethat transitions from one cross-section to another.

This is a fairly simple Pro Engineer Surface feature and is a bit limited when it comes to creatingvery complex surfaces. Conversely, a swept blendcan create some very complex surfaces. The swept

blend is a transition between two or more cross-sections that follows a specific trajectory.


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The helical sweep option is used to createhelical sweep feature. You have to definetrajectory that will specify the shape andheight of the helix, a pitch value, and a crosssection to create a helical feature using thisoption.A spring and a bolt are 2 good examples .


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Attributes:Constant - creates a helical feature with a constant

pitchVariable - creates a helical feature with a variablepitch

Thru axis creates a helical feature around an axis.The axis is sketched as the first trajectory of thefeature.

Normal to Traj creates a helical featureperpendicular to a sketched trajectory.

Right Handed Creates a helical feature swept tothe right.

Left Handed Creates a helical feature swept to theleft.

Pitch:On a thread, the pitch is the inverse of the number of

threads per inch.Defined as the distance between a point on one thread tothe corresponding point on the next thread .


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Examples:


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The Variable Section Sweep feature sweeps a singlesection along one or more trajectories. Thesections dimensions can vary as the section travelsalong the trajectories. The trajectories must be

selected from existing datum curves .Three types of variable section sweep:Normal to trajectoryNormal to projection

Constant normal direction


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Normal to trajectory :When using the Normal To Trajectory option, theorigin trajectory and at least one additionaltrajectory is required. The section remains normal(perpendicular) to the selected trajectory as itsweeps.Normal to projection:This option creates a sweep where the sectiony-axis remains normal (perpendicular) to aselected plane while the X-axis and Z-axisfollow the spines trajectory.


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ppt on sweep

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