Removing/ reshaping part of mesh during animation?

OK, what I’m trying to do is have a grinding wheel cut a “v” along the top of a piece of metal.Move down a .125" and cut another “v”, continue to do this along the entire piece of metal. How do I go about doing this?

One way you could do it is by using a lattice to make the groove. In the attached file, make the grooves by moving the lattices along the x-axis.

groove.blend (611 KB)

I ended up getting it to work by making two separate objects and having the one without the “v’s” hide the one with. Used the booltool with difference selected to reveal each “v” when needed.