Roller bearing mechanism problem 4

[MH500]

Hi every one
Recently I tried to make a Laminar box that composed several layers. and layers must have moving freedom in X (Longitudinal) direction under load.
to reach this goal I made some Aluminium frames and put flat bearing between layers.
But when I applied load on frames, they Locked and didn't move at all .
why this happend ?

 

[MH500]

I used surface grinding for roller plates and now Ra is 1.6
The black pipe is a good idea. I've never heard of it. But unfortunately in this case I can't use that, because 1)It increases layers distances. (2)It make vibration along movement that shouldn't be happen. unless I Lathing them.

Thank all of you. I learned many new things among your comments.
So I will change the designation and with considering all of your comments test it again.
If It worked ,I'll let you Know.
Also I'll be glad to know other possible ways.

 

[Skogsgurra]

It has been an interesting "adventure". Looking forward to see the solution.

One final question; when you say "designation", I guess that you mean "design". That leads to one question that I cannot answer myself - what is your mother tongue?

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[MH500]

I'm sorry !
You right.
I'm Spanish and my English language is not very well

 

[Skogsgurra]

Well enough to be understood. At least, you know that burrito doesn't mean "a little butter".

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

 

[3DDave]

"try that to see what happens" not "use that as the solution to your problem." If you are making no progress with the current set of circumstances it is best to change the circumstance and see what difference it makes. It's adding a data point to establish a slope to potential problem solution.

 

[MH500]

By the way I have to change and replace some parts.
Then try again.
In this case I don't believe , the test conditions have much effect on result. Because I did my best and considered many points ,even balancing the surface before loading.
Finally, I wish It will not lead to waste time and money.

Thank u

 

[MH500]

Hi everyone
Finally I could overcome the problem with these steps :
1) Decrase cylindrical bearings number and replace half of them with ball bearings.
2) Change cage material with Plexiglass.
3) Change design of bearing cage, so the bearings are in middle of cage and they can't pull out their positions while moving.
At the end, I test It under uniform pressure and It worked !
Thank you

 

[Skogsgurra]

Thanks for telling us!
You (obviously) worked through the holiday?
Any pictures showing the differences. Thousand words and such things, you know...

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[MH500]

Through Holiday ?!
never mind !
I did it about 2 weeks ago. But I didn't find free time to post it here.
unfortunately, I haven't picture right now,but I can share new cage model picture.
Happy new year