Heat treating only in that it can be a factor...
Cutting steel close-up and in slow motion...
Yeah well... I knew machining steel (milling, turning, grinding, drilling...) put stress (or is it strain... or is it both ???) into steel... and that it needed dealt with. I don't know that I know more about it now, but I wouldn't have expected cutting (machining) steel would be like this.
Mike
As a person insists they have a right to deny others their individual freedoms, they acknowledge those others have the right to deny them theirs...
|quoted:
Heat treating only in that it can be a factor...
Yeah well... I knew machining steel (milling, turning, grinding, drilling...) put stress (or is it strain... or is it both ???) into steel... and that it needed dealt with. I don't know that I know more about it now, but I wouldn't have expected cutting (machining) steel would be like this.
Mike
That is an awesome video it is amazing what we don't see when we look at a surface.
|quoted:
That is an awesome video it is amazing what we don't see when we look at a surface.
A little while after watching it, I started thinking back on years ago and learning from one of Kevin Cashen's posts that grinding was a machining process. I had this little vision of 60grit belts ripping cracks into the steel... and having little balls of steel wad up and roll under an abrasive particle's point. It seems the pressure of the cutting has to be tremendous.
Mike
As a person insists they have a right to deny others their individual freedoms, they acknowledge those others have the right to deny them theirs...
This is a great video. Thanks for posting it.
This clearly illustrates what actually happens when a piece of material is being cut. At a certain feed rate for a given material, a small sliver of the material cold welds to the tip of the tool's cutting edge. In this case, it is this chip of material that is actually doing the work of cutting. Adjusting the feed rate to build and maintain the sliver of material on the tip of the cutting tool will increase the life of the tool. However, it is also detrimental to the surface finish on the work piece. A higher feed rate will cause the sliver of material to be pushed from the tip of the cutting tool more often. This will create a better surface finish, but at a cost of tool life.
Besides feed rate, there are many other factors that affect the balance between surface finish and tool life. These include the use of a cutting fluid, the material that the cutting tool is made of and also the work piece material. What the machine operator does to maintain, or eliminate, the sliver of material on the cutting edge determines the surface finish and the life of the cutting tool.
You're sure welcome, Steve...
Mike
As a person insists they have a right to deny others their individual freedoms, they acknowledge those others have the right to deny them theirs...
