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P
pesau-21-Visitor
1-Visitor
May 10, 2017
Question

create exit curve

  • May 10, 2017
  • 2 replies
  • 4049 views

Hi all,

I require a help to create sweep using a helical curve and normal exit curve has shown in the figure .

I require support to create a exit curve which is tangent to the helical curve , so that I get very smooth sweep feature by combining these two curves

2 replies

S
sjuraj15-Moonstone
15-Moonstone
May 11, 2017

Use spline curve in sketch

P
pesau-21-VisitorAuthor
1-Visitor
May 11, 2017

hi skvarka,

I also tried with spline but it didn't work , if feel the helical curve and exit curve should be tangent , but question is how can we draw tangent to helical curve

S
sjuraj15-Moonstone
15-Moonstone
May 11, 2017

I dont know what you mean with exit and helical curve. There are tangent constrint in your image.

C
creodential10-Marble
10-Marble
May 12, 2017

I take it, that the helical curve is a 2D curve, too? In this case it should be sufficient to use the constraints as shown in the image

(use the end of the curve). You can also use centerlines to make sure that the constraints are correct.

If the helical curve is a 3D curve, a 2d exit curve won't work, because you'd need 3d tangency.

ScreenShot00436.png

ScreenShot00437.png

P
pesau-21-VisitorAuthor
1-Visitor
May 12, 2017

the helical curve is 3D

C
creodential10-Marble
10-Marble
May 12, 2017

In that case, you'll have to create a 3D curve, there are many ways to create those.

For example, create points, and then create curves through points in 3d. Start with a point at the end of the helical curve and add a axis for a tangential reference.

Alternatively, extrude the exit curve to a surface and use this as project surface for a second sketched curve.

Or, take your exit curve and create a second one perpendicular to the first and tangent to the helical curve, then use Intersect.

It's hard to tell without knowing the runout geometry of the helical curve.

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