It's called Flow Drilling, not uncommon in large scale manufacturing and takes a good deal of power. Developed by this German company I believe, used for threaded holes in thin walled sections mostlyI have often used carbide(the cheap Chinese brazed on type) to turn hard steel,HSS or otherwise. Of course,carbide was not made for that purpose,but you can get away with doing it.
I haven't tried using carbide for extended cuts on hard steels. Sooner or later,it will fail.
MAN! Re: The video on friction drilling . That guy is NOT A CHOICE MACHINIST!!! Too bad ANYONE can post videos out there.
Friction stir welding has been around for a while and is in regular use. SpaceX uses it to weld the lithium-aluminum alloy they use in their rockets.There is also a new type of welding wherein a fast turning tool is passed between 2 sheets of aluminum. It melts the edges of the sheets and stirs them together. I think this may still be in the experimental stages.
It's not that I thought the processes attempted in the video were not valid. They were just poor attempts. And,trying to weld copper with friction was just not viable. At least,not the way he was attempting to do it.
There is also a new type of welding wherein a fast turning tool is passed between 2 sheets of aluminum. It melts the edges of the sheets and stirs them together. I think this may still be in the experimental stages.
It's not that I thought the processes attempted in the video were not valid. They were just poor attempts. And,trying to weld copper with friction was just not viable. At least,not the way he was attempting to do it.
It's called Flow Drilling, not uncommon in large scale manufacturing and takes a good deal of power. Developed by this German company I believe, used for threaded holes in thin walled sections mostly