Socket Head Cap Screw counterbore question

[bmarchand]

We work with a lot of form steels for stamping dies and the work face is rarely flat.
I find that every shcs that I put in I have to change the counterbore depth
The only way I know how to do this is to change to custom and then modify, then you have to have each counterbore placed separately because they are not all the same depth

The scarey thing about doing it like this is if I have to change the bolt size, I have to remember to set it to normal again or the other fields don't go back to the new size, then I have to change to custom again to set my CB depth again

I could use a plane as well but it involves more work

I think the CB depth should not be locked and should be able to change it freely

In the old days you could pick a plane or point to infer your depth from

Is there any way to do this differently or are we stuck with this method for now??

Thanks,

Brian Marchand-Die Designer

http://www.armotool.com/

NX 9.0.2.5 / PDW
Dell Precision T7610 w/Xeon ES-2609
16G Ram - Nvidia Quadro K5000
Win 7 Pro x64

 

[JohnRBaker]

Without at least seeing your model it would be hard to make a recommendation. That being said, using a secondary Datum Plane it often the most practical way to position the starting location of holes relative to a non-planar face.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
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[bmarchand]

Here is an example

Brian Marchand-Die Designer

http://www.armotool.com/

NX 9.0.2.5 / PDW
Dell Precision T7610 w/Xeon ES-2609
16G Ram - Nvidia Quadro K5000
Win 7 Pro x64

 

[JohnRBaker]

Look at the attached model where I've added a counter-bored hole to a canted face. Edit the hole and look at ALL of the setting in the dialog and I think you will see what I did (hint: I did NOT use an external Datum Plane). And the depth of the counter-bore is correct when measured from the point (which is the origin of the hole) to the bottom of the counter-bore.

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

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

 

[bmarchand]

Ok, so your driving everything from a point instead of a sketch

The one reason we use a sketch is that its easier, when your adding your tapped holes to the plate that this bolts onto, we link the same sketch in with one click
Then if we have to move a hole we just edit the one sketch and cb'd hole and thread move together

I also like to keep a start block with holes already in it, but we don't know what the form will look like yet to add the points that would be different in the Z

Thanks for the info, I will investigate further if I can make the points work


Brian Marchand-Die Designer

http://www.armotool.com/

NX 9.0.2.5 / PDW
Dell Precision T7610 w/Xeon ES-2609
16G Ram - Nvidia Quadro K5000
Win 7 Pro x64

 

[JohnRBaker]

You could still create a sketch to locate the holes in normal 2D space and then simply project them down onto the faces of the model where they would be selected when placing the actual Hole feature(s).

See my revised attached model.

This is what I did, I created a sketch of points, projected them onto the faces of the model and then when I placed my counter-bored holes I selected the 'Projected' feature which automatically selected all four points and created the hole with the correct depth relative to the locations of the points in the 'Projected' feature. And to see how 'parametric' this approach is, after you've opened the model, edit the sketch adding a couple of additional points, one over the top horizontal face and one over the canted face. Then 'Finish' the sketch and watch what happens (you may get a warning message, just ignore it as it doesn't really mean anything in this situation and besides, you'll only see it once).

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

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

 

[bmarchand]

I like that John

Thanks

Brian Marchand-Die Designer

http://www.armotool.com/

NX 9.0.2.5 / PDW
Dell Precision T7610 w/Xeon ES-2609
16G Ram - Nvidia Quadro K5000
Win 7 Pro x64

 

[kl8ton]

We design stamping dies. For us, all of the screws in our screw library are set for 1.5 times thread engagement. In the actual screw prt file, the screw is positioned at the absolute CSYS with the end of the screw 1.5 times thread diameter below 0, 0, 0. We set our work plane at the bottom of the form steel (it is usually there already) and place our screws. One form steel could have 50mm long screws in an area and 200mm long screws in another area. If form changes end up exposing the head of the 200mm screw, simply replace component with a shorter screw. The C'bore updates, as the screw is shorter.

 

[bmarchand]

We do not put a screw body in the file, just what we are used to. I have done it both ways. We have progressive die wizard license and when we add the screws from the library it really slows things down.
Regards,

Brian Marchand-Die Designer

http://www.armotool.com/

NX 9.0.2.5 / PDW
Dell Precision T7610 w/Xeon ES-2609
16G Ram - Nvidia Quadro K5000
Win 7 Pro x64

 

[3dr]

At kl8ton...

Are the screws auto populating the points of a sketch? If I can achieve this I want to switch from my current method of placing the c'bored holes in one block, then adding the mating tapped holes to the other block down stream.

TIA for any info you can share.



Dave
Automotive Tooling / Aircraft Tooling / Ground Support Structures

NX9, Win 7 Pro SP1