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Describe a helical, silhouette, intersection bend, or a curve on a office face. Also generate wire from an intersection curve in blended.

What's New: 2019

Describe a Helical Curve

The Helical Curve tool creates abiding or variable pitch 3D coil shapes, such as springs and threads. Helical curves tin can be joined with other sketch entities to create a circuitous sweep path.

Notation: The second Coil command differs from the Helical Curve in that information technology requires a closed 2D sketch profile and an centrality to create a feature.

1. In an agile 3D sketch, click 3D Sketch tab Draw panel Helical Bend .
2. In the Helical Shape tab of the Helical Bend dialog box, choose a Blazon:
   • Select Constant helical curve to create a helix with a unmarried pitch value.
   • Select Variable helical curve to create a helix with multiple rows of parameters you specify in a table.
3. Select a Definition type to choose the parameters you lot want to use to define the curve:
   • Pitch and Revolution. Creates a helical bend based on a specified pitch and number of revolutions.
   • Revolution and Height. Creates a helical curve based on a specified number of revolutions and a height.

     Note: For a variable helix, you must use Revolution and Height values that are in a range greater than the value in the row above and less than the value in the row below.

   • Pitch and Height. Creates a helical curve based on a specified pitch and height.
   • Spiral. Available for constant helix only. Creates a apartment helical bend based on a specified number of revolutions.
4. Enter values for the type of shape you specified:
   • Bore (Optional). The diameter of the helical curve. Inventor calculates the diameter automatically based on height, pitch, and revolution. The point on diameter is projected into the plane (normal to centerline) of the start indicate.
   • Height. The summit of the helical curve.
   • Pitch. The elevation gain for each revolution.
   • Revolutions. The number of revolutions must exist greater than zero but tin include fractional revolutions, such every bit 1.v. If specified, the number of revolutions includes the end conditions.
   • Taper (Optional). The taper angle, if needed, for all constant helix types except Screw.
5. Click a Rotation selection: Left hand or Right hand.
6. On the Helix Ends tab of the Helical Curve dialog box, specify conditions for the Start and End points of the curve:

   Natural

   The altitude (in degrees) over which the curve achieves the transition (ordinarily less than one revolution). The following example shows the height with a natural terminate and the bottom cease with a i-quarter turn transition (90 degrees) and no flat bending:

   

   Flat

   The distance (in degrees) that the curve extends after transition with no pitch (flat). Provides transition from the end of the revolved helical bend to a flattened end. The example shows the aforementioned helical curve as the Transition angle in the previous paradigm, only with a one-half-plow (180 caste) flat angle specified:

   

7. In the graphics window, click to define the start point of the curve and and so click to ascertain the terminate bespeak.

Draw a Curve on a Face

Curve on Confront creates an interpolation spline directly on a part face based on your input. You lot can draw the spline across multiple faces on the same body. Each interpolation betoken has a coincident constraint to the face.

Notation: Bend on Face up works best with tangent and shallow angle faces. Equally the bending increases between faces the Curve on Confront tool may not produce a satisfactory result.

1. In an active 3D sketch, add sketch points or work points on a face up and add dimensions to prepare their position.

   Note: This pace is optional. Notwithstanding, for predictable update results we recommend calculation and positioning points using this process.

2. Click 3D Sketch tab Describe console Bend on Confront
3. In the graphics area, on a office face, draw the curve using existing points, or click to set the first bespeak of the spline.

   Annotation: For cases where multiple entities overlap between ii or more bodies, information technology is recommended that you hide any trunk that should not participate in the Curve on Face.

4. Continue to click, adding points where needed.
5. To close the loop and create a periodic spline, click the starting point. To close a spline, post creation, right-click the stop bespeak and cull Close Spline.

Valid inputs for creating a bend on a face up are:

• Point - 2D sketch, 3D sketch, spline control point, or piece of work point. A coincident constraint is applied to the selected point and the created bend. The face up must be visible. The point must be coincident with the face being drawing upon.
• Edge - a ancillary constraint is applied to the selected border and the created curve. The edge must be function of the shell. Spanning multiple bodies is not supported.

Editing a Curve on a Face up

Use interpolation spline editing techniques to modify the spline. For details meet To Create and Edit Splines

Tip: Y'all can drag the midpoints on the surface to reposition them. Use the ViewCube to help orient the model and then you tin can accomplish the desired results.

You lot can as well remove the bend association to the face. Right-click the Curve on Face browser node and click Suspension Link. Constraints for middle points are removed. Endpoints retain their constraints to either a face or bend. These constraints must be removed manually.

Where spline points are also used for other geometry, such equally curve endpoints or pigsty centers, the constraints are preserved.

Draw a Silhouette Bend

The Silhouette Curve tool creates an associative 3D curve along the edge of a torso as defined by a direction vector. Visualize a axle of light shining on an object. The silhouette curve is generated where the calorie-free drops off and the shadow begins. Silhouette curves are oft used to determine a natural parting line.

1. In an active 3D sketch, click 3D Sketch tab Draw console Silhouette Curve .
2. The Trunk selector is active in the dialog box. In the graphics window, select the Body.
3. The selector in the dialog box changes to Direction. Select a work plane, planar face, border, or an axis to specify the pull management.
4. Optionally, y'all can exclude geometry from silhouette curve generation by doing the post-obit:
   • Cull Faces in the dialog box and so select the faces to exclude from curve generation in the graphics window.
   • Check the Exclude straight faces choice.
   • Cheque the Exclude internal faces choice.
5. Click OK to create the curve.

   Inventor generates an associative curve along the outer boundary of the surface. Faces that prevarication in the pull direction are ignored.

6. If necessary, add lines or splines to create a closed purlieus.

   To use the silhouette bend to dissever an object, generate a Boundary Patch surface from the closed sketch. Use the purlieus surface as the Split Tool. If the boundary surface doesn't split up the solid, extend the surface.

7. To disable the association, select the silhouette curve in the browser, right-click, and choose Break Link from the context menu.

Draw an Intersection Curve

The Intersection Bend tool creates 3D sketch curves from intersecting geometry. You tin utilise it to create shapes used in consumer products, pipage, and to control the shape of circuitous lofts.

1. In an active 3D sketch, click 3D Sketch tab Draw panel Intersection Curve
2. In the graphics window, click a face, surface, 2d sketch curve, work plane, or part trunk to define the intersection.
3. Click one or more faces, surfaces, 2D sketch curves, or work planes to intersect.
4. Click OK to create the curve.

Generate Wire from Intersection Curve in Composite

1. Import surface information to a composite feature.
2. Generate a surface which intersects the composite feature.
3. Start a new 3D sketch.
4. In the 3D sketch, click 3D Sketch tab Create Panel Intersection Bend.
5. Select the composite and the surface.
6. Click OK.

3D curves are generated in the 3D sketch at the intersection point. Curves update when intersection bodies are updated.

Annotation: Endpoints of the wires are not constrained. Offset behavior may be inconsistent.

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Source: https://knowledge.autodesk.com/support/inventor/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/Inventor-Help/files/GUID-37BA1DCE-6BC4-41CD-A36D-577F31B304FC-htm.html