Gallery, Projects and General > The Design Shop
3D Printed Quorn Tool & Cutter Grinder
raynerd:
:thumbup:cracking work!
awemawson:
Nowt wrong with Leeds Norman, I was born there many decades ago :lol:
(mind you it's relatively clean now. When I left (1959) you definitely wouldn't hug a tree or you'd come off all black :ddb:)
Joules:
Micrometer body reprinted with splines at correct end this time. Whilst I had it apart waiting for the new body to print a quick picture of the insert, otherwise it all looks the same assembled.
I worked out a plan for the rotary table. It will start off with a perspex spindle as that is easy to substitute for metal if needed. The table is split in two parts, again to make best use of printed grain. I chose a triangular plug for welding into the table and lock orientation of the bar support. I have opened up the bar support to make use of my 16mm reamer and bulked this part up a bit as the walls are quite thin as standard. About 10hrs for these parts to print, then ALOT of fine painting.
mattinker:
I've been watching this build with great interest even though I have no plans to get into 3D printing. You said you were going to use pinch bolts and split cotters as clamping systems. I would have though that split cotters, although largely superior on castings would be not so good in plastic for the same reasons that you said that metal inserts would not be very good. The cotters expand and would probably deform the plastic whereas clamping bolts encircle the stresses around the shaft. Your thoughts?
Regards, Matthew
Joules:
Mattinker, I am hoping the forces needed to clamp the parts are very much reduced being plastic, also that the distortion will be in the area of the cotter if overtightened. This is still all part of the learning process, it's quite feasible the cotter will distort and jam. Split rings concentrate the stress at the pinch bolt, an option would be to build up a ring round the casting for extra support in this area.
As said early on, the design keeps changing as I mull over ideas and get input from others. I hope it inspires others to have a go and learn from my success and failures. It's a whole new game, to see if we can make some proper use of the technology in the home workshop.
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