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milling diagram (climb/conv)
- Thread starter SE18
- Start date
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Climbing is when the work and the endmill are both moving in the same direction. Climb milling is better for tool life since you're actually cutting instead of sliding. If your machine isn't rigid enough than avoid climbing cuts.
Here's a great writeup on endmills I snagged from somewhere.
Here's a great writeup on endmills I snagged from somewhere.
When you climb mill the cutter goes from top of the hill to the bottom. Like your on all 4's trying to pull your self up. When conv milling the cutter goes from the bottom to the top of the hill like your shoveling
The diagrams are correct if you interpret the arrows as indicating table motion.
Your correct but personally I think the drawing is to busy, I can see where the confusion is, there's more info than necessary:thinking:
Ok, all the diagrams above are pretty clear and useful when working with the side of the tool.
But when using a flat end mill, would it be better, with light machines, to mill using just the half of the tool which is not climbing or is it appropriate to use the whole end mill surface?
Here is an image better explaining my question:
(source)
But when using a flat end mill, would it be better, with light machines, to mill using just the half of the tool which is not climbing or is it appropriate to use the whole end mill surface?
Here is an image better explaining my question:
(source)
Sorry, but your feed direction is incorrect and you are showing a climb milling example which is bad practice.
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OK, I see how everything is working now!
The end mill is spinning clockwise and the table is moving clockwise in the diagram for conventional. That's easy to remember.
I don't know why this was so hard for me to visualize!
Also, now I know what's contributing to work hardening and dull end mills -- my conventional milling!
Looking at Marco's climbing diagram, I've always been puzzled how the side of an end mill can cut. It's fluted just like a drill bit but a drill bit can only drill straight down unless you buy a drill bit with the little cactus things sticking out of the flutes
The end mill is spinning clockwise and the table is moving clockwise in the diagram for conventional. That's easy to remember.
I don't know why this was so hard for me to visualize!
Also, now I know what's contributing to work hardening and dull end mills -- my conventional milling!
Looking at Marco's climbing diagram, I've always been puzzled how the side of an end mill can cut. It's fluted just like a drill bit but a drill bit can only drill straight down unless you buy a drill bit with the little cactus things sticking out of the flutes
I agree. Your diagram is better as it shows the cut.
I think that it is better in the long run to follow what seems to be the industry standard and use the workpiece frame of reference. In other words, think of yourself riding on the table watching the tool move about.