stephon0913
Plastic
- Joined
- Aug 12, 2011
- Location
- Portland, OR
A few weeks ago my boss decided on getting these little tabs we make laser cut instead of being machined. now we are talking 3/16 mild steel getting cut into 1" x 2" pieces. we just received the first batch in today, so now all i have to do is drill a single hole in them.now the problem lies whereas i used to stack these pieces about 5 high and drill right thru them no problem, there is multiple issues not only does the hole look horrible the holes wont consistently be in tolerance as far as position(hole diameter is fine) . ive been using a solid carbide 3 flute guhring 6.4 mm drill before plowin thru them like butter. since this change i switched to single part offsets and much lower speed and feed. seems to work fine now but its a little disappointing that this setup will take about 4+ times the amount of time as before. i have a feeling the heat from being laser cut is the problem, seems like its virtually hardening the material (work hardening). my question being is this common and will cutting out on a water jet solve this hardening issue? thanks all comments welcome