Metro Detroit Metalworking Club
 

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August, 2006

PRESIDENT’S MESSAGE Attendance at the meetings is a bit low and “Show and Tells” are dropping off. So show up,  dig up your projects and demonstrate your techniques and tricks. If you don’t, I can do lots and lots of CNC stuff…

MINUTES There were 18 members present, John O. and Emil C. presiding. There were no guests. We talked about the comfortable cushion of funds in the treasury and what we might do with it. Suggestions were to buy club tapes, books, publish the newsletter in colour, and make a club roster complete with mugshots or maybe all of the above.

Emil Caferelli, in his never-ending quest to know how doorknobs are made (the hollow bras ones, anyway) finally found the answer in one of his books. Its like I found. A preformed deep drawn cylinder is place in a cavity die. A rubber (or urethane) punch is inserted in the preform and high pressure applied to force it into the die cavity, and then withdrawn.  The die then splits and the doorknob is released. I kidded Emil about this, but I got a kick out of trying to figure out how such an ordinary object is made. I hope everyone else did, too.

 

 

 

 

I forgot who brought this mystery in, but whoever it was didn’t know what this is. There is lettering on it relating to patents, but that didn’t give it away. Any guesses, anyone???

 

 

 

 

These 3 pictures show what your president is up to. This is a CNC punching machine I am building from scratch.  It will punch sheet metal in an area 2 feet by 8 feet. It weighs over 700 Lbs, so I can’t bring it to the meetings. Its far more ambitious than my previous machines: it has servo controlled automatic punching, far larger X and Y travels, automatic tool clamping, tool rotating and automatic tool changing (probably 24 tools). Its all-electric – no hydraulics or pneumatics. The X,Y and Z axis just came up under computer control. It’s alive! All the electronics are just screwed to a piece of wood. The first thing this machine will punch is an enclosure for itself.