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sketch on angle

sketch on angle

sketch on angle

(OP)
i have a question i have a 6 inch dia circle .250 thick, i need to put a .125 in hole on the top of the circle at a 20 degree angle to put a hole thru how is this done in solidworks, any help would be appreciated

RE: sketch on angle

Add an axis to center of extruded circle. Add plane tangent to curve using other plane and axis as ref.

Chris
Systems Analyst, I.S.
SolidWorks/PDMWorks 05
AutoCAD 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716

RE: sketch on angle

Eddie,

Like Chris said, use the axis to drive the plane at your desired angle.  I'm assuming you want the hole centered on the thickness .250".  If so then the base feature should be thickened (mid-plane) about a plane.  Then that plane should be used to create the axis which will be tied to the outter edge of the circle.  Then create a plane Normal to curve.

Best Regards,

Heckler
Sr. Mechanical Engineer
SW2005 SP 5.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
      o
  _`\(,_
(_)/ (_)

"Coming together is a beginning, staying together is progress, and working together is success." - Henry Ford



 

RE: sketch on angle

I would like to offer an alternative solution that does not involve creating an axis or plane.  The reason I do not create an axis and plane is because I do not like to create extra features when I do not have to.

What I do is create a construction line in the initial sketch of the 6 inch diameter circle at the desired 20 degree angle.  When I create the .125 hole, I first select the cylinder face then start HoleWizard.  After selecting the hole size and clicking next, a point is automatically located on the cylinder face.  I use relations to make this point horizontal (or depending on the orientation, vertical or along-Z) to the end point of the 20 degree line (I resisted Heckler’s suggestion of extruding the circle using mid-plane because then all I would have had to do was make the point coincident with the end point of  the conctruction line.  Besides that, design intent will not always let you extrude this way.)  I then dimensioned the point .125 from the end of the cylinder by select the end face and the point.  Finally, I clicked finish to create the hole and then re-hid the circle sketch.

To make it easier to see what I did, you can download my example file from http://www.yourfilelink.com/get.php?fid=9712

Regards,

Regg

RE: sketch on angle

That's what I love about SolidWorks, more than one way to do something.

Chris
Systems Analyst, I.S.
SolidWorks/PDMWorks 05
AutoCAD 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716

RE: sketch on angle

Good one Regg...design intent is the big driver on any modeling problem.

Best Regards,

Heckler
Sr. Mechanical Engineer
SW2005 SP 5.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
      o
  _`\(,_
(_)/ (_)

"Coming together is a beginning, staying together is progress, and working together is success." - Henry Ford



 

RE: sketch on angle

I'm not sure, I haven't worked with it in a while, but with Reggs solution you can only put the hole thru the center of the part, if you need it off center I believe you have to do as ctopher said, but I may be wrong.

mncad

RE: sketch on angle

mncad,

Yes, if the hole is off center then you would have to use ctopher's solution.

Regards,

Regg

RE: sketch on angle

Let's not forget about the revolved cut.  All you would need for this as far as reference geometry goes is a sketch plane, unless I'm not interpreting the original question correctly.

RE: sketch on angle

Here's how I usually do it for angled holes.
http://img82.imageshack.us/img82/7809/angledhole6mm.jpg
I prefer creating a recess first & then placing the hole on the flat surface. It makes it easier for starting the tap when a tapped hole is required. Also the recess can be cut in both directions so that no lip is created in the hole.

See also FAQ559-1156

cheers
Helpful SW websites  FAQ559-520
How to get answers to your SW questions  FAQ559-1091

RE: sketch on angle

CBL,

Does the machine shop then manufacture the part with the recess?

Regg

RE: sketch on angle

If specified on a drawing yes, but I usually only do that for tapped holes.

cheers
Helpful SW websites  FAQ559-520
How to get answers to your SW questions  FAQ559-1091

RE: sketch on angle

Here's something to keep in mind when using Hole Wizard:
If you select a flat face, hole wizard will generate a 2D sketch which can be used to position the hole
If you select a cylindrical face, or don't select a face at all, a 3D sketch is generated which can be used to position the hole. In general 2D sketches are much easier to control, so where possible a face should be selected before use.

Only found that out recently when reading SolidWorks for Dummies - quite a useful book even though I have used SolidWorks since 1998.

RE: sketch on angle

Quote (SW_Help):

Pre-Selection and Post-Selection
Note the following regarding pre-selection and post-selection of a face when using the Hole Wizard hole:

When you pre-select a planar face, and click Hole Wizard  on the Features toolbar, the resulting sketch is a 2D sketch.

If you first click Hole Wizard , and select either a planar or a non-planar face, the resulting sketch is a 3D sketch.

Unlike a 2D sketch, you cannot constrain a 3D sketch to a line. However, you can constrain a 3D sketch to a face.

cheers
Helpful SW websites  FAQ559-520
How to get answers to your SW questions  FAQ559-1091

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