how to do threads...

[apollo]

I am new to pro/e and forgive for asking many quetions. I just found that this forum is very useful to learn things I haven't discovered yet.


Can someone show me how to do bolt/screw threads? is it hard? thanks

 

[prohammy]

apollo,


If you really want to do a bolt thread, then use a helical sweep..... but if you are doing it remember that it is very memory intensive. Most companies just model the bolt and add a cosmetic thread


Kev

 

[apollo]

is helical sweep the tool we do springs? I didn't know that we don't have to do threads if we do bolts! that's a lot easier!


I think I know how to use the helical sweep. but what will be the cross section shape if I do threads? my guess is diamond shape?

 

[Zaki]

Just use any mechanical drawing book from college course. Normally, that books has all type of thread cross sections. Just use helical sweep like you use in springs and use protrusion or cut option to make threads.

 

[apollo]

thanks.

 

[design-engine]

I found most places that I've contracted before.... get upset when they see an actual helical sweep. They prefer to see a cosmetic tread with the proper call out. It's been a while since I contracted but I doubt manufactuererswant to spend the time on a helical sweep unless they plan on using an SLA machine to layer up the threads.

 

[apollo]

what is cosmetic thread?

 

[davisdony]

it is an engineering methord of representing normal threads which has following benifits

1. Needs very less time to model and draw

2. Need very less memory space

3. Makes the drawing simple

 

[Zaki]

Actually, making threads in drawings and solid modeling is not practical in any standard at all. If you go to fastener manufacturer's website and download there models you will not find any threads on bolts and nut at all, even cosmetic. If some one require a paper drawing for its manufacturing or production department, he uses cosmetic threads. If you are designing a non standard component or die, mold or any kind of threaded hole in any part, you will show by cosmetic threads, not cut helical threads. Other wise, no need to show even cosmetic threads on fasteners as every one need to purchas those parts not manufacture it. In proe, cosmetic thread is represented by a surface that shown three quarter circlein drawings,as per drawing standard, to show thread. This is the whole story.
Edited by: Zaki

 

[[-Skint-]]

I model threads sometimes when I am showing images / renders to a potential customer etc. Apollo, get yourself a ZEUS book

 

[michael3130]

We put bolts, screws, paint and other consumables in as bulk items in our assemblies so they are there for the bill of materials.


I only model up threads on plastic parts that we are going to mould.

 

[prohammy]

]


I model threads sometimes when I am showing images / renders to a potential customer etc. Apollo, get yourself a ZEUS book

Skint,


I've had 3 Zeus books in the last 4 years and because I move about so much (Coventry nowadays by the way) I either lose or have them stolen.


Kev

 

[[-Skint-]]

Haha Kev, yeah I know the feeling. Infact I lost my last one a few weeks ago and I am currently using a similar thing Socket & Allied Screw Guide.


Coventry eh... live there or just work there ? A beer could be had one day as I am based in Exhall

 

[apollo]

thanks all.

 

[mgnt8]

I only model up threads on plastic parts that we are going to mould.

Same here. There are thread standards for bottles & caps. They used to be maintained by the SPI. Now its the CMA, but I just read that it may turned over to the NACD. So if you find them, then you can put them on a 2D print and hope your mold maker knows what they hell your talking about. Otherwise you have to model them.