foglght4
Automotive
- Mar 20, 2015
- 4
I have to use a copper crush washer to seal against coolant. The bolt is an M12x1.5 simple DIN 908 zinc plated bolt. There is a small interference of 0.1mm between the copper washer and the bolt (worst case), where the bolt surface starts to radius. I need to somehow model or calculate the crush of the material and ensure a proper seal. I'm having even a hard time finding any data supporting the amount of clamp load needed to seal this joint in the first place.
I'm not quite sure I can model the plastic deformation of the copper accurately given pen and paper (excel too I suppose).
Even on just a simple crush washer gasket with a single bolt, I'm not coming up with much in terms of basic equations to understand the clamp load needed to seal the joint using a simple copper washer gasket. How much do I need to compress the copper to fill the voids in the mating materials to ensure a proper seal, or am I thinking about this the wrong way?
I'm not quite sure I can model the plastic deformation of the copper accurately given pen and paper (excel too I suppose).
Even on just a simple crush washer gasket with a single bolt, I'm not coming up with much in terms of basic equations to understand the clamp load needed to seal the joint using a simple copper washer gasket. How much do I need to compress the copper to fill the voids in the mating materials to ensure a proper seal, or am I thinking about this the wrong way?