topic Re: How to make a functional threads in an Assembly? in Inventor Forum

How to make a functional threads in an Assembly?

sb.aalborg — Fri, 08 May 2020 17:08:18 GMT

How do I make a screw/bolt functional in an assembly in Inventor? If I for example turn the screw/bolt it follows the pitch of the threaded hole or nut and uses the threads. Like threading a nut on a bolt or screw in a threaded hole.
I know this is possible in Fusion 360 with a motion link and a cylinder.

Cheers!

Re: How to make a functional threads in an Assembly?

JDMather — Fri, 08 May 2020 17:14:06 GMT

You use a Motion Constraint >Rotation/Translation in the assembly environment

you use a Screw Joint in the dynamic simulation environment.

Re: How to make a functional threads in an Assembly?

sb.aalborg — Fri, 08 May 2020 17:49:17 GMT

Okay, so I still use a cylindrical joint and then use a motion constraint?
Thank you for the quick answer 😄

Re: How to make a functional threads in an Assembly?

sb.aalborg — Fri, 08 May 2020 22:21:15 GMT

I'm searching for how to screw it on with the mouse myself. So if I point my mouse in circles it will screw itself in or out. Do you understand? 🙂

Re: How to make a functional threads in an Assembly?

sb.aalborg — Fri, 08 May 2020 22:34:24 GMT

Like this 🙂

Re: How to make a functional threads in an Assembly?

JDMather — Sat, 09 May 2020 12:27:01 GMT

@sb.aalborg wrote:

Do you understand? 🙂

I understand how a screw works.

Attach your assembly here and end all doubt.

Re: How to make a functional threads in an Assembly?

JDMather — Sat, 09 May 2020 13:56:53 GMT

@sb.aalborg wrote:

Do you understand? 🙂

http://help.autodesk.com/view/INVNTOR/2020/ENU/?guid=GUID-0293C151-565F-4980-AA95-DD76C54AB538

http://help.autodesk.com/view/INVNTOR/2020/ENU/?guid=GUID-E0E6B33F-3FAD-4161-8796-6CF4202D5F55

Re: How to make a functional threads in an Assembly?

sb.aalborg — Sat, 09 May 2020 15:41:06 GMT

Sorry it was not to be rude.

Sorry, but I still don't get it. If I ground my nut, I cant use the rotation/translation, to screw it in myself.
It is so simple in Fusion 360.

Can you perhaps send an assembly where this is done or a video? 🙂

Re: How to make a functional threads in an Assembly?

JDMather — Sat, 09 May 2020 15:45:31 GMT

Did you use a Screw Joint (much easier than Rotational/Translation)?

Attach your assembly here and end all doubt.

Re: How to make a functional threads in an Assembly?

sb.aalborg — Sat, 09 May 2020 16:02:37 GMT

I have tried both. If I use the screw joint, I can only screw it on or screw it in the dynamic simulation itself, not outside of it. I have attached the assembly, with the parts I want to try it with. The large parts have modeled threads and it is those I want to be able to work together and be able to thread them with the mouse myself.

Thank you for your time! 🙂

Re: How to make a functional threads in an Assembly?

j.palmeL29YX — Tue, 12 May 2020 10:36:33 GMT

You can add an angle constraint (for rotation) and a Flush/Mate constraint for linear translation. The value of the Flush is a formula depending of the angle value. If you drive the angle >>you see<< the wished motions.

If you want to drag it with the mouse, you can include both parts in the contact set. To drag this with the mouse, you need a very very powerful computer. My laptop cannot cope with this challenge.

Another possibility is to add a tangent constraint between the both parts. To >>animate the mechanism<< drag the mouse. This is not very stable, but possible.

(I added a small hole to the screw for better viaualization of the rotational movement.)

BTW: It would be a good practice, to create the parts symmetrical (centered) to the origin planes.

If my reply solves your problem, click the "accept as solution" button. This can help others find solutions faster

Re: How to make a functional threads in an Assembly?

sb.aalborg — Tue, 12 May 2020 19:57:30 GMT

Very nice! Thank you so much 😄

Still smoother en Fusion 360, but this does the job.

Thank you for your time.

Stay Safe

Re: How to make a functional threads in an Assembly?

KakaSungura — Thu, 09 Jul 2020 17:01:43 GMT

Hi.

You answer here gave me the solution to the first part of a problem I'm having. However, I still need help in the second part.

Lemme explain.

Smooth motion constraint that can be driven.

I'm modelling an assembly of a clamping system. I was having trouble getting the screw to move forward with every turn of the Tommy Bar. But on seeing your answer, I changed the relationship to a Motion > Rotation-Translation type of constraint. That solved the problem (1st part of problem), but brought up another problem - the motion is now really erratic/I can't drive the constraint (2nd part of problem).

Erratic motion - utter madness!

If you look at the videos, in the first one, when I click drive, the Tommy Bar turns smoothly, but in the second one, the motion is erratic. It moves forward/backward with every turn, yes, but it's out of control. How do I make it move like in the first video, but with that type of joint?

I've tried changing the Distance field in the Place Constraint dialog, but the only difference is the lateral motion changes while the erraticness?/erraticity?/madness remains.

Thank you.

Re: How to make a functional threads in an Assembly?

JDMather — Thu, 09 Jul 2020 17:32:27 GMT

Attach assembly here.

>>Screw Motion<<

Re: How to make a functional threads in an Assembly?

KakaSungura — Fri, 10 Jul 2020 09:42:44 GMT

Let me watch the video then try it out myself first before asking you to do it for me. I want to learn.

Thanks.

Re: How to make a functional threads in an Assembly?

IgorMir — Sat, 11 Jul 2020 03:46:07 GMT

Hi Mara;

Here is one more video for you to watch. That if it helps. 🙂
Cheers,

Igor.

@KakaSungura wrote:

Let me watch the video then try it out myself first before asking you to do it for me. I want to learn.

Thanks.