Do I understand correctly that the tooling is made with 1 micron accuracy, but that the manufactured stamped parts are at a 20 micron tolerance? Where do the losses in tolerance come from?
This difference is often called normal process variation (NPV). Not every part of the tooling requires 1μ precision, and 20μ is quite good for most electronic connector applications though some applications may require tighter tolerances. A general rule of thumb is that the tool must be 10X more precise than the piece parts to account for NPV.
Here's a napkin example example- The dies are made to a precision of 1 micron but a die will have two opposite sides. So you double your loss of precision to 2 microns. In the Cartesian 2d plane you have two axes so multiply your tolerance by 2 again. Then you have to meet all of those tolerances twice because you have a punch and a die. so square it and you're at 16 microns. And that's just tooling tolerances and not setup tolerances... it's called tolerance stacking and it's remarkable and complex.
the funny thing is there is this job add that ask for all of your team expertise in one person and only offer a salary of about 4k USD. how freaking stupid is that. It was a very big WTF moment for me as i to work in the stamping industry and never though how clueless a hiring Manager could be
That is so impressive!
Thank you very much brother. May Allah bless you in your life and health!
Can you work with pure gold sheets?
Great video
Remarkable!
Amazing Superb
Do I understand correctly that the tooling is made with 1 micron accuracy, but that the manufactured stamped parts are at a 20 micron tolerance? Where do the losses in tolerance come from?
This difference is often called normal process variation (NPV). Not every part of the tooling requires 1μ precision, and 20μ is quite good for most electronic connector applications though some applications may require tighter tolerances. A general rule of thumb is that the tool must be 10X more precise than the piece parts to account for NPV.
Here's a napkin example example-
The dies are made to a precision of 1 micron but a die will have two opposite sides. So you double your loss of precision to 2 microns. In the Cartesian 2d plane you have two axes so multiply your tolerance by 2 again. Then you have to meet all of those tolerances twice because you have a punch and a die. so square it and you're at 16 microns.
And that's just tooling tolerances and not setup tolerances... it's called tolerance stacking and it's remarkable and complex.
A micron is a millionth of a meter
Awesome.
Great!
hearing billionth was enough
the funny thing is there is this job add that ask for all of your team expertise in one person and only offer a salary of about 4k USD. how freaking stupid is that. It was a very big WTF moment for me as i to work in the stamping industry and never though how clueless a hiring Manager could be
الحلال حلال وإن لم يفعله كل الناس والحرام حرام وإن فعله كل الناس
His shit is on point compared to where i work