How to make a screw? - Spiral

[hello213]

Hi, im trying to make a screw. And I was wonding how you can make the spiral part that goes around the center of the screw.(looks like a spiral staircase.)

Ive got the basic shape and everything but I dont know how to make the spiral.

Would you use a Helical Sweep then protrusion? But I dont no the steps to get the spiral on the screw base to work/happen.

Thanks

 

[[-Skint-]]

Yes you are right Helical Sweep is the way to go. If you have a ZEUS book or something similar ( giving you accurate thread details with pitch, section etc )... then you can create a simple start.


Create your revolve with the diameter of your screw shaft. Insert helical sweep ( cut or protrusion depending if you want to add/remove material ). Select your datum plane. This takes you into sketcher where you will need to add a centreline through your revolved feature and also draw a straight line down one edge the distance you want the thread to go.


If you got that far, you will then be promted to add a pitch. Once you add your pitch, you should be back in sketcher and have two construction lines giving you a location to place your section.


create the section you need and it pops you back to your model, where you choose direction of travel for the cut/protrusion and TICK TICK Viola !! Your done.

 

[rmatija]

There is exemple


regards


2009-02-21_012842_screw.prt.zip

 

[hello213]

]


Yes you are right Helical Sweep is the way to go. If you have a ZEUS book or something similar ( giving you accurate thread details with pitch, section etc )... then you can create a simple start.


Create your revolve with the diameter of your screw shaft. Insert helical sweep ( cut or protrusion depending if you want to add/remove material ). Select your datum plane. This takes you into sketcher where you will need to add a centreline through your revolved feature and also draw a straight line down one edge the distance you want the thread to go.


If you got that far, you will then be promted to add a pitch. Once you add your pitch, you should be back in sketcher and have two construction lines giving you a location to place your section.


create the section you need and it pops you back to your model, where you choose direction of travel for the cut/protrusion and TICK TICK Viola !! Your done.

How do I get promted to add a pitch, OR how do I add a pitch? Ive added a line down one edge the distance I want the thread to go. (does it need to be in a particual place? or any where?)

 

[hello213]

Alright ive added the pitch,( I forgot to tick to accept, and enter the ptich) now how and where do I add the actaull protrusion (spiral.) What are the steps to add/do the section, how do I draw it in the sketcher?

Ive drawen a line for the swp profile, on the screw base, ticked it, added the pitch 1.5 and now the drawingis fliped upside down. How do I now add the spiral to the screw, what are the steps and where do I draw it.

says > section Defining

I tryed to add a triangle to the screw to make a protrusion but I got a error when i ticked it.


Thanks
Edited by: hello213

 

[zpaolo]

]

Yes you are right Helical Sweep is the way to go.

Be also sure to check E-Cognition tutorial on how to build an helical sweep... without using helical sweeps! It's a neat trick with VSS and TRAJPAR...

Paolo

 

[hello213]

Doesnt matter I found out how to do it.

Would any one know how to make the the of a cross of a philips screw to point downwards, to what one actaully looks like. The top of it.

 

[hello213]

Ive drawen the cross on top, how do I extude it downwards, but to also break the surface so its hollow.
Edited by: hello213

 

[dewme5]

instead of cutting from the top into the screw head. I use an extrusion on a datum in the plane of the screw axis. removing material in both directions. repeat at 90 degrees.

I would suggest you go to the files section, and download similar hardware to what you are looking for, and study the method in which it was made. Many people have many different ways.