V5R20 creating a surface normal to a surface and tangent to a second surface 1

[jayvo]

Good afternoon. In catia v5r20 I am trying to create a surface that would be normal to one surface and also tangent to a second surface. Basically we are trying to create a flange surface normal to the class A part shape and tangent to a part radius. Has anyone been able to do this?? I know it is possible in other softwares, but I have not been able to find anyone who can do this in catia.

Thanks,

Jay

 

[TibiX]

Hi jayvo,

I would recommend you check out the Sweep feature — it has "tons" of possibilities of creating surfaces.

Best of luck!

CATIA V5R21 – mold tool design engineer

 

[jayvo]

Thanks for the responce Tibix. We have played around with the sweep command, and have not been successful. When using a sweep, you allways need to have a base spline or curve to define your sweep. We are trying to define it by 2 surfaces, and none of the options in the sweep command allow it. If anyone else has any ideas they would be greatly appreciated.

Thanks,

Jay

 

[Azrael]

It's a two stage operation... if you don't create a power copy or udf...
First create the normal surface, use the sweep and set profile type to "linear", use then the subtype "with reference surface", chose the edge and surface and set angle to 90deg to get it normal.
Second create a blend surface between the existing tangent surface and the newly created normal surface.

As mentioned earlier, if this is something you repeat often consider making a powercopy or udf

 

[itsmyjob]

Hello,

If Azreal answer is not good for you I have another solution:

CATIA V4 used to do this with no problem, but in V5, the option is not available.
What can we do? where is the problem?

I remember when I received my V4 advance surface training, Eddy D. gave us a very good explanation of the fundation of V4 sweep. The key is in the SPINE, which define a plan in which the computation is done. The plane follow a curve, and the resulting geometry from the plane (some line, circle, curve) would then define the sweep surface.

So V4 could do it but not V5... V4 was asking for : a SPINE and 2 surfaces, nothing else.

V5 sweep does not provide this option, but adaptive sweep does!

1) Have 2 surfaces
2) define your SPINE (search this forum or the net for more info on SPINE)
3) create a point on the SPINE and a plane normale to it passing by the point.
4) create a sketch on the plane (you could define the origine of the sketch by the intersection of the SPINE)
5) in the Sketch, create the 2 intersections (A and B)with the 2 surfaces
6) create the line (L) tangent to the intersection you want (say A) , with one extremity on the other intersection (B) => coincid. constraint end of line and curve
7) make sure you have 2 constraints in the sketch (A tgt to L) (L [end pt] coincid to B )
8) create another line (C) tangent to the intersection B
9) create a contraint (angle / perp.) between Line C and Line L
10) create a coincid. contraint between the end of L and C
11) so we have 5 constraints in the sketch
12) turn A, B and C as construction element
13) exit sketch
14) define another point on the SPINE where a plane normal to it would intersect both surface.
15) create Adaptive sweep with guide curve = SPINE, Sketch = Sketch and define a new section by selecting the last point you created in 14

Voila

Eric N.
indocti discant et ament meminisse periti ​