Aluminum bending after anodize 3

I have items made for me in Eastern Europe. One of my items uses an aluminum faceplate (about 1x2 inches) that is .5mm to .6 mm thick and 1050 alloy. The faceplate must be printed before final manufacturing. The printer wants to anodize the surface first before silk screening. After printing, the faceplate much be bent 90 degrees to form a right angle on one end.

Since anodize does form a ceramic coating will it cause the base metal to fracture or crack during the bending? If it cracks, is this only a local surface cosmetic issue, or is the metal compromised in strength? Printing after bending is not an option and the printer refuses so use any alloy other than 1050. I have been doing the bend operation for many years with no problems, but now the printing process is changing and the anodize step added.

Am I headed toward problems or can I get away with this?

BTW, the products are sold world wide into the model airplane hobby market.

Thanks for some expert advise. I have no clue.

 

berkshire

I ship critical gearworks to the assembly house in e europe. They produce to my specs. The issue of printing and faceplates never came up until they lost their long time supplier. Volumes are not high enough to be able to wield a big stick on a print house. The one currently being talked to demands they supply their own sheet metal which is 1050. Tests over there yesterday shows it to too soft. In the past the assembly house supplied 6084 sheet to the printer. But,it was a obsolete print process I now find out and no one still uses it.

Yes, among other functions, engine cutoff is performed. That is one of the simpler products made. But the bend is directly associated with the cutoff function.

 

[berkshire]

Timerguy,
There is a big difference between the mechanical properties of 1000 series aluminum and 6000 series.
It sounds to me that you would be better off keeping your original material and finding a different printer.

Your device sounds similar to the timers I used in competition 40 years ago, fuel cut off after 30 seconds de- thermalise after 3 minutes.
B.E.

 

berkshire,

Yep, you got it. You were using a Tatone, most likely. Maybe a KSB. Both long gone from the market. And, our motor runs now are more like 9 or 7 seconds. With the engine turning 30,000 RPM, in 30 seconds, it would be a tiny dot in the sky in 30 seconds. And the DT is now usually 2 minutes unless you fly in the California desert.

Changing printers is not quite as easy in e europe as it is in the US. Fewer choices.