Cleanliness of stamped parts

Hello,

Cleanliness required on stamped parts with analyse interpretation according ISO 16232.

we do washing for degreasing (with percloretilene) but we still fail to cleanliness analyse.

Question: what kind of operation is best suitable for cleanliness of stamped parts?

 

Are you asking how to clean the parts or test the parts for cleanliness.

 

Cleaning process...not test

 

In our stamping facility, we use washers with built in water heaters and use a soap/defoamer combination to wash the oil off the parts. We use several washers that can be moved from press to press, and a stationary washer that also has an air blade drying system. Some of our parts require a cleanliness check using dynes ink. Our washers do a good job (with proper maintenance and cleanout), but there are some parts that require hand wipe down after washing.

 

First you need to break down the oils you use. A lot will depend on the oil. Work with your oil supplier to see what works best. We have a service who supplies a solvent and special tanks. After the parts are dipped, they are then washed - soap/water in a tumbler or vibratory. Then dried. We use some heavy oils and it works well. Good luck.

 

Thank you all for replies...

My process includes washing of the parts, but the machine only degrease the parts, this point is ok.

But my part fails on cleanliness on metal particles due to shape of pins (the part is a shield case with 5 pins).

Our washing machine does degreasing in ultrasonic baths but doesn't remove particles from pins.
I have read an article about megasonic baths. But in Europe I didn't find any service supplier for this kind of whasing.

Thanks