Cylinder head machining
Cylinder head machining
(OP)
Can somebody provide information about how cylinder heads are machined?
I am above all interested in the machinings and operations required to install the valve guides, valve seats, control cut and so on.
I understand that the way this is done may depend on the OEM considered but is there an usual way to do it?
I am above all interested in the machinings and operations required to install the valve guides, valve seats, control cut and so on.
I understand that the way this is done may depend on the OEM considered but is there an usual way to do it?





RE: Cylinder head machining
RE: Cylinder head machining
I am particularly interested in knowing in which order the machinings for the valve guides, valve seats and control cuts are performed.
Any info concerning this point?
RE: Cylinder head machining
The OEM has to deal with squaring, drilling, and tapping the acessory mounting bosses, along with drilling and spotfacing the headbolt holes.
I've seen video of purpouse built machining centers that drilled, reamed, tapped and spotfaced several sets (4-8) of heads in one cycle (I'm glad I don't have the job of setting all those tools or re-timing them).
RE: Cylinder head machining
RE: Cylinder head machining
RE: Cylinder head machining
Rod
(*)
"If ya can't dazzle 'em with brilliance, baffle 'em with with bull s---"!
RE: Cylinder head machining
Some spindles would be fitted with complicated tooling that flipped out an insert for a second operation, for instance a rough cut during the forward stroke, then a finish cut on the return stroke, which also has the advantage of ensuring concentricity because a second "set up" was not involved.
Positionally Related features were sometimes done with a (complicated danged) water cooled (for thermal and thus dimensional stability) block spindle. For instance, the main bearing line, cam line, and bell housing dowel holes would sometimes be done with one block spindle, so those features would be (very!) consistently located in every engine.