Density variation effecting balancing of cast iron machined parts
Density variation effecting balancing of cast iron machined parts
(OP)
We are manufacturing ductle iron ring gears which call for balancing when produced from castings with unmachined surfaces left on finished part. Due to a quantity reduction we are using cast iron bar and machining the part "all over". Would the balancing requirment be eliminated or could the variation in the density of the material be so bad that they still need it.
Some "pratical" advise would be greatly appreciated.
Thank you very much.
Some "pratical" advise would be greatly appreciated.
Thank you very much.





RE: Density variation effecting balancing of cast iron machined parts
RE: Density variation effecting balancing of cast iron machined parts
Here is one of the CI bars that we used.
http://www.dura-bar.com/
RE: Density variation effecting balancing of cast iron machined parts
RE: Density variation effecting balancing of cast iron machined parts
Thanks for your input.
RE: Density variation effecting balancing of cast iron machined parts
In the case of ductile iron,if as cast surfaces remain,they could be influenced by variations in density(due to micro porosity/shrinkage) or due to mold wall movement while the casting solidifies. Mold wall movement(resulting in bulge) is absent in case of steels and grey irons.
To avoid or minimize the problem it is best to machine all over.(if design permits).
" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke