I want to do the countersunk drilling on checkerplate size 6.0 (T) x 2107 (L) x 1250 (W). also 8 holes of dia. 33.0 mm on same plate for mass production. ie. 200 nos per day. pl. give the us the process for the same if any you have.
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If the checker plate is aluminum a die could be used. Punching all the holes and counter sinking them with one stroke. You do not say what the plate is to seal or bolt to. The forming of the counter sink will distort the flat of the back.
If that is a problem the punches can be replace with spindles to drill and counter sink the holes all in one stroke. Will need to apply a coolant to the work while being drilled.
A machining center
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Use a rotary broach , hopefully your magnetic drill can be set up off the checker plate or it will not be stable , in which case you must supply a piece of sheet steel on which to mount it.
As for counter sinking you did not say what size holes you are countersinking? but if you use a countersink with a pilot same dia as the hole it will stabilise your countersink and stop it bouncing off the checker plate bumps.
Or mount your drill on a beam to cover the width of the plate and slide the plate under it on rollers, put some position stops on the beam for the drill to suit your hole /countersink layout.
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I though this post had finished no comment from guest or thanks.
A rotary broach fits in a socket with a side lock screw pretty much like a Weldon milling cutter also with the drills made for these coolant can be supplied down the center a good idea for aluminium. These types of cutters reduce the amount of metal removed to do the job and are fairly stable with large holes also break through would be very smooth as compared to a regular drill.
I hope that answers your question, google some pictures they are worth a thousand words.
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Dont get on to the roundabout if you dont know how to get off
Now I get it. I think that's what we call a rota-broach here, and we call the hex and square hole cutters rotary-broaches. Thanks for the quick reply and explanation.
Countersunk Drilling on 6 mm Checkered Plate
Re: Countersunk drilling on 6 mm checkered plate
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