Component securing? 3

[MechThermDesigner]

Hello,

I have a 13(H)x6(W)x 130(L)mm slot where my component edge can be fitted im looking to secure it in this slot. I have looked at numerous ideas. Is there any way i can secure it?

 

[MintJulep]

Yes. Use a fastener.

 

[MechThermDesigner]

I can't modify the slot(external). So how do i put a fastner on it?

 

[IRstuff]

You need to be more forthcoming with your requirements. Does it need to survive vibration, shock, what? Does it need to be removable? What's wrong with epoxy?

TTFN

FAQ731-376

 

[MechThermDesigner]

Yes it need to suvive vibration & shock and has to be removable.

How would u apply the epoxy?

 

[mcgyvr]

You guys must be psychic, your already giving out answers and this guy hasn't even given close to enough information to make a logical conclusion.
How about some images of the components/slots/how it should look when secured,what type of component,etc?

How can you even answer this question..
"I've got a slot and a component how can I attach the component?"
How about Velcro,superglue, screws, clips,duct tape?

WAY more info needed.

 

[MadMango]

Can you describe the mechanical interface between the slot and your part? You need to provide even more details (vibration frequency, purpose of slot and your component, weight of your component, materials of same, environment, etc) if you expect anyone to offer reasonable suggestions to you. You say you can't change the slot, can you change your component?

 

[MechThermDesigner]

I have no images. Basically its a C slot, the material is steel, the edge of component im trying to secure is Al, once ive got the component in place i need to secure it to the edges of the c slot that can be built in the component edge. The only access I will have is from the front to secure it.

 

[MechThermDesigner]

The component can be changed. The C slot has flat polished surfaces. The aim is to secure it from the top and bottom inner face of the C slot. Regarding the shock and vib i dont have any figures but for arguement sake lets say its medium.

 

[IRstuff]

"medium" is NOT an engineering requirement. Is this for school?

TTFN

FAQ731-376

 

[mcgyvr]

Get out a camera or something, pdf of the drawings, screen shot, something. Spoon feeding information 1 drop at a time will never get your question answered.
You say you can only access it from the front.. How are we supposed to know what's the front?

 

[chicopee]

About a drawing as to what you are trying to do? I hate it when only a partial description is given when a sketch can be worth a thousand words.

 

[tbuelna]

MechThermDesigner,

From your rather vague description, it sounds like you need some sort of clamping device, that relies solely on friction at the clamped slot interface to fix a component under conditions of vibration and temperature change.

Some sort of 2-piece expanding wedge device will grab the slot sides and hold tight. It can be adjusted by a jackscrew or cam mechanism. Since it relies on friction for its clamping effect, you must make sure that the strain induced friction force present at the mechanism/slot interface is always greater than the component inertia forces it is restraining against under vibration. You must also consider any strain relief caused by CTE mismatch in the clamped materials. A safe vale for Mu to use in your analysis (assuming clean, dry metal on metal) is about 0.15.

Clamp the parts as tight as you can without exceeding your allowable material bearing stresses. Also, try to design the clamp device with some elasticity so that it will be less likely to lose preload under vibration or thermal changes. And if you use a threaded fastener, make sure it has a suitable type of locking device.

Hope that helps. Good luck.

 

[MechThermDesigner]

Currently im using a wedge lock but its not good on a thermal point of view.

Regarding to the question, IRSTUFF. This is not a academic assignement.

 

[mcgyvr]

1 more drop into the lack of information bucket "Thermal requirements"???

So we've got
1-Secure "some mysterious component" into a C slot. ??
2-Only access from the "front" which we have no idea what the front is. ??
3-Must be removable.
4-Must survive vibration and shock in the "medium" range. ??
5-Mysterious thermal requirements. ??

Good luck!!!

 

[tbuelna]

MechThermDesigner,

You should be able to get a wedge lock to work. As I mentioned though, you need to design the device with adequate elasticity if you expect it to maintain preload under changes in thermal conditions.

Good luck.