better way to skew a semi-circle 1

[ilovedividends]

Attached is a file where I am practicing skewing a semi-circle(ie. little more than half a circle actually).

The bottom circle is symmetrical. The top one is skewed by trimming the symmetrical circle up then offsetting the tangent curve then adding bridge curves.

Are there other methods to accomplish this? Thanks.

nx 9

 

[JohnRBaker]

If the Arc was not part of a Sketch, you could use 'X-Form' to edit it's shape, as seen the attached video.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[ilovedividends]

Thanks for that, before I play with that, is there the ability to make that skew technique parametric so I can plug n play many different values and have the part re-built itself?

It isn't a must to be able to control the skew with expressions, but I would like to.

nx 9

 

[JohnRBaker]

Currently inside the Sketcher you could use a Spline curve which you can create parametric dimensions for each Knot Point used to define the spline. In the next version of NX we've added the ability to create Splines in a Sketch by defining it's Poles, again using parametric dimensions, which provides better control over the shape when it's important that the final shape be as smooth as possible.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[ilovedividends]

Thanks, I'll give the spline a try with per knot expressions.

nx 9

 

[Toost]

The tough question here is: what shape do you want it to have when skewed ?
In your example , you have three pieces of circles plus two bridge curves, the circles will always be circles, with constant curvature, is the design intent to get a overall smooth curve or should the profile be circular on the top plus lower ends?
If the later, you should be on the correct track, If you go the spline direction, the number of shapes is infinite but can be controlled. - for example add construction lines in the sketch to control tangent directions of the spline.

Attached is an example in the upper sketch, i have kept the circles but made them "reference". The new spline is snapped the upper circle and thereby controlled by it. The lower ends are tangent to the two lines.

Regards,
Tomas