how to draw 3d curve in catia

Draw a helical, silhouette, intersection bend, or a curve on a part face up. Likewise generate wire from an intersection curve in blended.

What's New: 2019

Draw a Helical Curve

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

Annotation: The 2D Coil command differs from the Helical Curve in that it requires a closed second sketch profile and an axis to create a feature.

1. In an active 3D sketch, click 3D Sketch tab Draw panel Helical Bend .
2. In the Helical Shape tab of the Helical Curve dialog box, choose a Type:
   • Select Constant helical curve to create a helix with a single 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 cull the parameters you want to employ to define the curve:
   • Pitch and Revolution. Creates a helical curve based on a specified pitch and number of revolutions.
   • Revolution and Superlative. Creates a helical curve based on a specified number of revolutions and a meridian.

     Notation: For a variable helix, you must use Revolution and Height values that are in a range greater than the value in the row to a higher place and less than the value in the row beneath.

   • Pitch and Height. Creates a helical curve based on a specified pitch and pinnacle.
   • Spiral. Bachelor for abiding helix but. Creates a flat helical curve based on a specified number of revolutions.
4. Enter values for the type of shape you specified:
   • Diameter (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 aeroplane (normal to centerline) of the start signal.
   • Meridian. The pinnacle of the helical curve.
   • Pitch. The elevation gain for each revolution.
   • Revolutions. The number of revolutions must exist greater than zero but can include partial revolutions, such as 1.5. If specified, the number of revolutions includes the cease conditions.
   • Taper (Optional). The taper angle, if needed, for all abiding helix types except Spiral.
5. Click a Rotation selection: Left manus or Right hand.
6. On the Helix Ends tab of the Helical Bend dialog box, specify weather for the Start and End points of the curve:

   Natural

   The altitude (in degrees) over which the curve achieves the transition (commonly less than one revolution). The post-obit example shows the top with a natural end and the bottom end with a ane-quarter turn transition (90 degrees) and no flat angle:

   

   Apartment

   The distance (in degrees) that the curve extends after transition with no pitch (flat). Provides transition from the terminate of the revolved helical curve to a flattened stop. The instance shows the same helical curve as the Transition angle in the previous image, but with a half-turn (180 degree) flat angle specified:

   

7. In the graphics window, click to define the start point of the bend and then click to define the cease bespeak.

Draw a Curve on a Face

Curve on Face creates an interpolation spline direct on a part face based on your input. You can depict the spline across multiple faces on the aforementioned body. Each interpolation bespeak has a ancillary constraint to the confront.

Notation: Curve on Face works best with tangent and shallow bending faces. Every bit the angle increases between faces the Curve on Face up 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 set their position.

   Note: This step is optional. All the same, for predictable update results we recommend adding and positioning points using this process.

2. Click 3D Sketch tab Draw panel Curve on Face
3. In the graphics expanse, on a part face, draw the curve using existing points, or click to fix the first point of the spline.

   Note: For cases where multiple entities overlap between two or more bodies, it is recommended that you hide any body that should non participate in the Bend on Confront.

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

Valid inputs for creating a curve on a face are:

• Signal - 2D sketch, 3D sketch, spline command bespeak, or work signal. A coincident constraint is applied to the selected betoken and the created curve. The face up must exist visible. The bespeak must exist coincident with the face beingness cartoon upon.
• Edge - a coincident constraint is applied to the selected edge and the created curve. The edge must exist part of the shell. Spanning multiple bodies is not supported.

Editing a Curve on a Face

Utilise interpolation spline editing techniques to modify the spline. For details come across To Create and Edit Splines

Tip: You tin drag the midpoints on the surface to reposition them. Employ the ViewCube to help orient the model and then you can reach the desired results.

You tin also remove the curve association to the face. Right-click the Curve on Face up browser node and click Break Link. Constraints for heart points are removed. Endpoints retain their constraints to either a face or curve. These constraints must be removed manually.

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

Describe a Silhouette Curve

The Silhouette Bend tool creates an associative 3D curve along the edge of a body equally defined past a management vector. Visualize a beam of low-cal shining on an object. The silhouette curve is generated where the light drops off and the shadow begins. Silhouette curves are oft used to decide a natural parting line.

1. In an active 3D sketch, click 3D Sketch tab Depict panel Silhouette Curve .
2. The Body selector is active in the dialog box. In the graphics window, select the Body.
3. The selector in the dialog box changes to Management. Select a work aeroplane, planar face, edge, or an axis to specify the pull management.
4. Optionally, you tin exclude geometry from silhouette bend generation past doing the post-obit:
   • Choose Faces in the dialog box and so select the faces to exclude from curve generation in the graphics window.
   • Check the Exclude directly faces option.
   • Check 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 lie in the pull direction are ignored.

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

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

7. To disable the association, select the silhouette curve in the browser, correct-click, and cull Break Link from the context card.

Describe an Intersection Curve

The Intersection Curve tool creates 3D sketch curves from intersecting geometry. You can employ it to create shapes used in consumer products, piping, 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 up, surface, second sketch curve, work plane, or role body to define the intersection.
3. Click 1 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 data to a composite characteristic.
2. Generate a surface which intersects the composite feature.
3. First a new 3D sketch.
4. In the 3D sketch, click 3D Sketch tab Create Panel Intersection Curve.
5. Select the blended 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.

Notation: Endpoints of the wires are not constrained. Starting time 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

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