Gallery, Projects and General > How do I??

Cutting sheet metal on the mill?

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Lew_Merrick_PE:
AdeV  --  My approach is to use "Hold Down Battens on top of the "sheet" on top of similar "Battens" (with slightly larger screw holes) below the "sheet" such that the entire thing mounts to the t-slots and, if necessary, use "clamp bars" at the ends.  I probably have a half-dozen of such things in my "mill tooling" bin.  --  Lew

PekkaNF:
Once I needed to make an swich/fuse panel for a boat. Pretty much only way I could figure out how to make square holes and make sides square was to draw the panel layout approxiamately to aluminium drill mounting holes to waste parts (two holes for inside of each square waste - where exact location is not that important and the applied two sided tape to mount it onto MDF and used plenty of screws to mount it securely and then used four flute slot drill to cut all the square openings. Previously tries failed because cuter packed too much swarf between the aluminoum plate and MDF.

Spurry:

--- Quote from: John Rudd on April 05, 2020, 06:09:17 AM --- And......make sure you set the depth stop so you dont drill right thru the mdf.....should you get carried away with your success..... :lol:

--- End quote ---

John, the 19mm certainly helps in that respect,  :thumbup: although I usually have plenty of 12mm.

Pete

WeldingRod:
+1 on the strap it to.wood...  put screw holes in the waste bits.

Sneaky hold:  blue tape a clamped down board, blue tape the bottom of your part, spead some super glue on the tape, and stick then together.  I've been milling 1/8" and 3/16" fiberglass this way.

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rklopp:

--- Quote from: WeldingRod on April 05, 2020, 04:45:21 PM ---+1 on the strap it to.wood...  put screw holes in the waste bits.

Sneaky hold:  blue tape a clamped down board, blue tape the bottom of your part, spead some super glue on the tape, and stick then together.  I've been milling 1/8" and 3/16" fiberglass this way.

Sent from my SM-G892A using Tapatalk

--- End quote ---
The robotics students where I mentor do the blue tape trick a lot while CNC milling aluminum plate up to 1/4” thick bonded to MDF. It works a treat as long as the coolant doesn’t get to the MDF too much. Stuffing in some short drywall screws halfway through the job is sometimes done for security.


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