keywey function

[ChevyM]

is there a keywey function? or what is the best way to create standard keyweys?
is it possible to create a list of standard keywey measures so you can import them in to NX?

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[SiW979]

You could spend a bit of time and create you own in the reuse library (does NX 6 have that? Im not sure). These can then be dragged and dropped on to your models.

Best regards

Simon NX7.5.4.4 MP5 - TC 8

http://www.jcb.com

 

[joycejo]

Or use the slot feature

John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6.0.5.3

 

[ChevyM]

yes, NX6 does have that. i know how it is used, but how is this possible? cause you have so much different axles with all kinds of weird shapes and diameters. is there a way that when i select the diamter on the outside, that i can choose which keywey it makes? i can only think a way of making those sketches, but not a simple way to substract it from an axle with different kinds of lengths

and bout the slot feature: its exacly what i need, but you cant use it on round solid or is there a way?

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[JohnRBaker]

Attached is an NX 6.0 model which shows two different approaches to creating a keyway in a shaft, one using an Extrude and the other using a Slot feature. Unhide (Show) the Datums to see how the Slot was positioned.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[ChevyM]

ah oke! i totally forgot those datum planes! thank you very much!

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[ChevyM]

and what about a hole? if you put a tangent plane on the inside, you miss a piece when you use the slot function
so how is that made?

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[JohnRBaker]

I'm not sure what it is that you're attempting to do. Could you at least provide an image or something?

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[mmauldin]

If you are working inside of a hole, you either offset the tangent plane (and add the offset amount to the slot depth) or place the slot on a centerline plane.

 

[JohnRBaker]

In that case offsetting the tangent plane is probably your best bet.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[ChevyM]

yes, i do mean a inside a hole, but how do i know how much the offset is for the slot i need, cause there is always an other diameter i need for the offset, so the offset differs everytime, what is the formula for that? you must also need to take care of the fact that the width you need for the slot has influence for the offset you need. so how is this done? and is this really the best way to get that? i know you have a function in solidworks that it just creates a slot wherever you need it. i know its not solidworks but was just wondering(or is it possible to create myself), if not, how to calculate the offset you need?

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[mmauldin]

I don't know if there is a formula for determining the offset, I typically just "guesstimate" and adjust if necessary. If I needed to construct a more robust model, I would place the slot on a plane that passes through the center of the hole and set the slot depth to the desired depth plus the radius (using Measures Radius)of the hole.

Example attached.

 

[JohnRBaker]

If you have a Machinery's Handbook there are formulas for calculating the depths of keyways as well as tables which will give you that information for standard keyways for standard size shafts. The whole thing is based the idea that the 'sidewall' of the slot, NOT the center, will be half the height of the key.

Where A is the calculated Offset or so-called 'height of arc', B is the Height of the key and R is the Radius of the shaft, the formula is:
___________
A = R - √ R² - (B/2)²

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[ChevyM]

oke thnx!
so there is no other way to implement this easier?
what if i needed a lot of different keyways in othere parts? is this the only way this is done? is there a way to make a command with that formula? the same way as in solidworks? or is the best way to do is, make a detailed tutorial on how this is made? with that formula?

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[JohnRBaker]

Create a UDF (User Defined Feature) and add it to the Reuse library.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[ChevyM]

dont have that licence here.. thats a shame.
and i made a shaft with your formula. with a radius of 17.5 and a depth of 1mm. but after that my final result is0.0035mm offset.. thats way too low, you have any idea? cause the only way i think to fix this is to make a tutorial myself for the company here. but i need to know how to make that offset right with all different kinds of radius, and keyway depths..


Best regards,

Chevy

NX6
Win7, 64 Bit

 

[ChevyM]

i've found a licence that has the UDF im gonna take a look for it!
but i can't find what ive done wrong in the formula...

Best regards,

Chevy

NX6
Win7, 64 Bit

 

[JohnRBaker]

That number looks to be about half the correct value. Attached is a simple spreadsheet which computes this for you.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

UG/NX Museum:

http://www.plmworld.org/p/cm/ld/fid=209

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

 

[jerry1423]

Can you please tell me what license is required to do UDF's ?

 

[ChevyM]

this value, is the offset from a tangent plane on the shaft right?
so if the radius of the shaft is 17.5 and your answer said 0.007144 then the plane should be at 17.4926 from the centerline right?
and is there a help file or tutorial on how the UDF works?

Best regards,

Chevy

NX6
Win7, 64 Bit