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A student nedds help about DRILLERS Smile
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Posted by: MikeF

12/31/2006, 06:01:47

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Hello

Im a student at the Thechnion (Israeli institute of technology.
I am working on a project about driling machines, and need to find information about the driller itself (things like tempreture it gets to, stress it needs to hold, etc.).

If anyone can help me find that sort of information, or refer me to a data base, it would be great.

Thank you very much,
Mike








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Re: A student nedds help about DRILLERS
Re: A student nedds help about DRILLERS -- MikeF Post Reply Top of thread Forum
Posted by: randykimball
Barney
01/02/2007, 21:57:03

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To search for that information use the term "drill".

Search and learn about the flutes, the shank, the point, the web, and styles of sharpening the points.. including thinning the web point.

The most stress is very near the center where the drill actually pushes material away with compressive forces.

The farther out on the diameter you get the higher the cutting surface footage and the more heat that must be displaced.

The cutting edges can be positive or negitive. Why negitive? ... so that the drill will not "screw itself" through thin or soft material and hang.

The rpm in which to spin a drill has everything to do with the diameter and the material it is drilling.

The feed rate is determined by the same factors as rpm is but are effected as well by horse power and drill strength.

..now, go learn more.... good luck.





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