Check for perpendicularity
Check for perpendicularity
(OP)
Hello All,
I am looking for some kind of mechanism which helps me to know whether the power drill is normal(perpendicular) to the work surface. This should help the operator to know he is drilling correctly (normal to the surface). A slight deviation of 2 to 5 degrees is acceptable.
Thanks
Shashi
I am looking for some kind of mechanism which helps me to know whether the power drill is normal(perpendicular) to the work surface. This should help the operator to know he is drilling correctly (normal to the surface). A slight deviation of 2 to 5 degrees is acceptable.
Thanks
Shashi





RE: Check for perpendicularity
If it's a random thing that is needed in all sorts of situations and locations, a simple "drill block" can do it. Drill and ream a straight hole into a block of steel that is perpendicular to the bottom face. Put said block where you need to drill the hole. Drill through that block into the workpiece. The diameter of the hole in the drill block should be just enough to allow the drill to spin freely but not so loose that it can be out of perpendicularity or cause chips to bind between the block and the drill. Whether or not you need to bush the hole depends on the desired life expectancy. Using an aluminum block with a steel bushing is lightweight and lasts a long time.
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NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Check for perpendicularity
Google "drill stand" or "drill guide"
RE: Check for perpendicularity
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Check for perpendicularity
RE: Check for perpendicularity
First thought: get a block of mild steel with sufficient real estate for clamping. Block size: L/D >= 3. Mill+Grind both sides parallel to within <suitable tolerance>. Add suitable drill bushings from <whatever source>. Clamp in place. Drill through material using drill bushing jig. This will give you about as accurate perpendicularity as possible with a manual drill.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Check for perpendicularity
I was looking into more automated mechanism like using sensors (since this is a hand held tool). I thought of a concept using IR beams to measure distance. i will use 3 IR beams (since we need 3 points to establish a plane) to measure distance of the object from drill collet, and if the distance measured is same for all, the surface is perpendicular.
Any comments on feasibility of this concept.
Thanks
Shashi
RE: Check for perpendicularity
There have already been many methods/fixtures discussed that are so much easier.
Whats wrong with a low cost drill guide?
http://www.woodcraft.com/Images/products/600/14614...
RE: Check for perpendicularity
But I'd be hard pressed to offer criticism or suggestion without knowing more about your situation. Are you drilling parallel to gravity, such that a bubble level would even be appropriate? Obviously such things won't work if it's a horizontal or odd-angle operation. What are you drilling and how many times, how many places, does it have to be mobile and held in the hand, or is this a stationary operation. What type of drill motor or press are you using? There's a lot of variables that affect "is this a good idea" or not.
As for 'feasible' - yes, one could make up a gizmo to measure distances, calculate the plane, and figure out how far out of parallel the recorded plane is from the plane established by the sensors themselves. It /can/ be done, but I don't know if it /should/ be done.
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NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Check for perpendicularity
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?