Clinch systems

[WindyParticipant @windy30762]

I have some 0.1mm 316 stainless foil arriving in an annealed state.

But have to join it to get necessary width.

I have lock jointed it in the past but with the intense heat red hot+ the lock joint opens.

Does a member know about this clinch type of joining, as you do not put a hole in the thin sheet?

**LINK**

I would consider making dies etc. if suitable.

Please consider that weight is very important so if I can do without rivets or screws.

Paul

 

 

Edited By Windy on 09/10/2013 10:56:55

Edited By Windy on 09/10/2013 10:57:26

[WindyParticipant @windy30762]

[Michael GilliganParticipant @michaelgilligan61133]

Paul,

Sorry; no experience, but it does look promising.

A couple of "first thoughts" though …

1. Will your material be sufficiently ductile? …
2. I suspect that the joints might have low "peel strength"

… similar characteristics to spot-welding, I would think.

MichaelG.

[jason udallParticipant @jasonudall57142]

I have seen foils “stapled” using a punch and die..punch is simple parallel section with center drill hole ..and small radius ( about same as foil thickness) the die is under cut about two-thickness at base and a small raised pip left in center of base..depending on fit desired a rotating joint can be made…

[jason udallParticipant @jasonudall57142]

Btw a washer if acceptable would vastly simplify die and strengthen joint…
The foils we were working with were 10 , 15, and 25 micron can’t say what fore but only needs to last for 12 minutes

[John McNamaraParticipant @johnmcnamara74883]

Hi Windy

Would RTV type silicone adhesive work? They are good for 350DEG C according to literature, maybe higher if the working life is 12 minutes? or is that maximum apogee……

Alternatively small stainless steel pop rivets with a stainless steel washer on the back to take the expanded lateral force of the rivet. If you must washers both sides would be even stronger. A very strong joint you can get them down to 1/16 of an inch diameter.

Regards
John

Edited By John McNamara on 09/10/2013 13:16:05

[John McNamaraParticipant @johnmcnamara74883]

Hi Windy

I found the perfect rivet press for your job….**LINK**

Notice the worker behind the C frame with the hat. FA Sinatra? Not even mentioned in the caption.

Regards
John

[WindyParticipant @windy30762]

It will not fit in the workshop **LINK**

Paul

[Sub MandrelParticipant @submandrel]

What about spot welding , using a pair of carbon rods snarfed from old dry cells and a car battery as a power source?

Neil

[Ian PParticipant @ianp]

Posted by John McNamara on 09/10/2013 13:26:11:

Hi Windy

I found the perfect rivet press for your job….**LINK**

Notice the worker behind the C frame with the hat. FA Sinatra? Not even mentioned in the caption.

Regards
John

It looks like the designer of that riveter previously worked in the aircraft industry, as he has put some holes in to take the excess weight out!

Ian P

[Sub MandrelParticipant @submandrel]

Posted by Ian Phillips on 09/10/2013 17:23:36:

Posted by John McNamara on 09/10/2013 13:26:11:

Hi Windy

I found the perfect rivet press for your job….**LINK**

Notice the worker behind the C frame with the hat. FA Sinatra? Not even mentioned in the caption.

Regards
John

It looks like the designer of that riveter previously worked in the aircraft industry, as he has put some holes in to take the excess weight out!

Ian P

Surely that's a hornblock? "Excuse me boss, but are you really sure that 'Tich' is a 3 1/2 metre gauge loco?"

Neil

[FatgadgiParticipant @fatgadgi]

Hi Windy

You're right, these sort of clinch fixings need no hole. They are widely used in automotive (and I think my car is held together with them) but I have never seen them for really thin materials, such as your 0.1mm.

They are great in shear, but peel strength is limited. Manufacturers like them because what you see is what you get, so unlike welding, if they look and measure right, they are good joints.

They have been around for donkey's years – I think Tox from the US was an early developer. I suggest you drop them a line pretending to be a manufacturer and ask them if they can join your thickness and material, which may put you on the right track

Cheers Will

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