Pull test standard? Wires coming off the electrodes at the weld

Jmcdonald870 · Dec 11, 2008

Hello all,

I have a quick question. Where I work we build welding electrodes. Some of these electrodes have wires welded on them that have a J-plug attached.

Long story short, we have a customer that is having problems with our wires coming off the electrodes (at the weld). So, we had a meeting with the customer and it was decided we needed to do a random pull test on the parts. So, being the small machine shop we are, we built a homemade pull tester out of some alum and a fish scale. :lmao:

Now the customer is asking us what standard we use for this test? Is there a standard in place for our fish scale pull tester? Ive never seen a pull test standard.

The customer gave us a spec of 4.5 pounds. Is that our standard?

Big Mac

Randy · Dec 11, 2008

Re: Pull test standard?

Yep, if that's how they want to define it.........Oh yeah, ya gotta calibrate the fish scale to a recognized standard now and keep records...........

You might want to check this link........http://www.bsi-global.com/en/Standa...rs/Manufacturing/Welding/Welding-consumables/

Also check with the American Welding Society

LMitschelen · Dec 11, 2008

Re: Pull test standard?

Jmcdonald870 said:
Hello all,

I have a quick question. Where I work we build welding electrodes. Some of these electrodes have wires welded on them that have a J-plug attached.

Long story short, we have a customer that is having problems with our wires coming off the electrodes (at the weld). So, we had a meeting with the customer and it was decided we needed to do a random pull test on the parts. So, being the small machine shop we are, we built a homemade pull tester out of some alum and a fish scale.

Now the customer is asking us what standard we use for this test? Is there a standard in place for our fish scale pull tester? Ive never seen a pull test standard.

The customer gave us a spec of 4.5 pounds. Is that our standard?

Big Mac

We have several pull test situations in our company involving electrical interconnects. I just did a quick review of our test procedures and saw no reference to industry, military or aerospace standards.

We treat the customer requirement as specification (minimum). The standard is the NIST-traceable weight(s) that we use to calibrate the pull test aparatus.

Miner · Dec 11, 2008

Re: Pull test standard?

You may want to investigate ASTM F458 - 06 Standard Practice for Nondestructive Pull Testing of Wire Bonds

If this standard is not the correct one, I am sure that ASTM does have the one that you need.

andygr · Dec 12, 2008

Here is another referance that might help.
http://www.amazon.com/gp/search?index=books&linkCode=qs&keywords=0070326193
:2cents:

somashekar · Dec 12, 2008

Jmcdonald870 said:
Hello all,

I have a quick question. Where I work we build welding electrodes. Some of these electrodes have wires welded on them that have a J-plug attached.

Long story short, we have a customer that is having problems with our wires coming off the electrodes (at the weld). So, we had a meeting with the customer and it was decided we needed to do a random pull test on the parts. So, being the small machine shop we are, we built a homemade pull tester out of some alum and a fish scale.

Now the customer is asking us what standard we use for this test? Is there a standard in place for our fish scale pull tester? Ive never seen a pull test standard.

The customer gave us a spec of 4.5 pounds. Is that our standard?

Big Mac

You may perhaps find a standard, but that must be suitable for your application and meet customer requirement as well. Looks like your customer has given you a spec and you can get started. If 4.5 lb is the retention force per wireweld you may have to set up your process with some safety factor added to the spec and VALIDATE that process. CALIBARATE the pull force measuring insrument before you conduct validation of the wireweld process.

Pull test standard? Wires coming off the electrodes at the weld

Jmcdonald870

Randy

LMitschelen

Miner

Forum Moderator

andygr

somashekar

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