The calculations were missing.
Here they are.
Kind regards,http://files.engineering.com/getfile.aspx?folder=151b7b13-7420-4591-83d6-a5f05cecf88f&file=Mathcad_-_Screw_and_Nut.pdf
Dear Gentlemen,
A friend of mine asked to perform a few calculations in order to find out if the threads of a Nut and Screw could sustain the amount of traction force applied.
So, I performed the calculation to find out the area of the threads in contact and, using a factor of 2, I have found...
Dear Gentlemen,
I would like to thank you all for the valuable information provided during this Thread.
I think that right now we have information enough to finish the tool and we will move on that direction.
I hope I can count on you next time.
Regards,
marcuscouceiro
Hi desertfox,
The tool will be man powered. Now that you mentioned, it seems that there is no reason to use one section with ACME threads and another one with UNC thread since the worst case scenario is based on the UNC thread. Is that what you mentioned? I have posted a drawing of the tool as...
Hi Mike,
Although it will be used frequently it will be men powered. The main problem is the material that we have to use. I am not sure if a screw made of ANSI4140 is easy to find (I am located in Brazil).
Besides that, due to the arrangement, one end of the power screw has to change to 3/4...
Dear Gentlemen,
I was finally able to finish the project of the power screw and nut for the assembly of the shaft.
Could you have a look and give me you comments?
This is my first design here at the company and I do not want to machine the tool before someone with more experience tells me...
Hi desertfox,
You are correct. I did not notice the information that you posted before. The table further below gives a value of 0.8 (Mild) Steel (Mild) 0,74 0,57 but these are related to flat surfaces.
Thank you once again for your patience and sorry for my mistake.
Hey hydtools,
Thanks...
Dear Gentlemen,
Thank you all for sharing your experiences. Here are my comments:
Mr. CoriPad and KingNero,
I will use 0.25 in my calculations instead of 0.8. This will give me a lower axial stress and it´s within your experience.
Mr. desertfox,
I had seen those tables before but they gave...
Hi CoryPad,
Thank you so much for your quick answer. Can we consider our depot facilities a ´traditional environment´? It´s a large area where we do maintenance in trains.
Is this value (0.2 +/- 0.1) based on your experience or based on a book? I will probably use your values but just as a...
Dear All,
Here at company we have to install an axle onto two (3) bearings. After using Lame´s equation I was able to find the pressure generated due to the interference between the outer diameter of the axle(wich is solid) and the inner diameter of the bearings.
My question is regarding the...
Hi Mr. Mike,
Thank you for your answer. I have just uploaded a drawing to give you an idea.
What you said is correct. The inner ring of the bearing is really reacting to the pulling force but this is the correct way, according to the service manual.
Regarding the equations, is there any...
Hello Gentlemen,
I was designated to create a tool for our maintenance depot and since I am new in the company I would like to show a good work by providing all necessary calculations and so on.
Basically we have a pinion with 65 mm OD (+0,024,+0,011 tolerances)that fits by interference in the...
Hi MadMango,
Thank you for your answer. As far as I coud see I do not have any automatic relations preventing the movement of the cams. My main problem is that when I select ´Mate´ I do not know which features I have to select on Cam 1 and Cam 2 in order to make available the angle ´Mate´...
Gentlemen,
I am trying to assembly one camshaft using SolidWorks and everything was going fine until now. The problem is that I need to add an angle between the cams and I am not beeing able to do it. Right now they are both aligned. I can rotate one of them manually but this is not a good...
