Ohrndorf V12, new challange

[crueby]

Great results!  Using the printed block for setting the angle is a great idea.
 

[Dave Otto]

Watching that cutter plunge to the bottom of the hole is always a little nerve racking.

Dave

[Olli-Matti]

Well done Achim so far, interesting project that will be pleasure to follow!

May I ask about your cnc mill, is it your own conversion? You have optimum bf-20 manual mill and this cnc mill aswell in use? The frame of the cnc machine looks similar to bf-20


regards
Ollie

[fumopuc]

Watching that cutter plunge to the bottom of the hole is always a little nerve racking.

Dave

Dave indeed, always close to a little hart attack.

[fumopuc]

Well done Achim so far, interesting project that will be pleasure to follow!

May I ask about your cnc mill, is it your own conversion? You have optimum bf-20 manual mill and this cnc mill aswell in use? The frame of the cnc machine looks similar to bf-20


regards
Ollie

Hi Ollie, thanks.
My CNC mill is a FF500 ready for CNC from Proxxon in Luxembourg.
The spindle is from Teknomotor in Italy.
The CNC conroller is Eding CNC from Netherland.
All matched  together with the help of Sorotec in Germany.

[fumopuc]

Hi everybody, more swarf.
3. set up the deck for cylinder 1-6 now.
Basically it is mirrored and the cylinder position with 5,2 mm off set.
I have learned to handle the cutter much better in the corners.
A 25 mm sample was made to check if all holes fore the cylinder are really round.

[fumopuc]

Set up #4 on the mill, the holes for the main bearing blocks.
My tools for the threading is not long enough, so I decided to stop 3 mm before the bottom, it can be finished later with a conventional M4 tap.

[Kim]

Wow!  There's a lot of work in that block.  Very nice progress, Achim! 

Kim

[fumopuc]

Set up #5 and #6, cosmetics pure.
And finally 4 holes M6 for later engine fixation, set up #7 and #8.
For me no chance to mill the thread, no M6 tool available, so a job for later using of of some M6 taps.
Overall I have counted;
M3 98
M4 10
M6  4
I am sure that I can feel no real motivation to do these all by hand wit conventional taps.

[RReid]

That is looking fantastic so far, Achim. You are making excellent progress!
You don't want to tap 112 holes all by hand? Why not?

[Admiral_dk]

Man you have removed a huge amount Metal from the original 'Lump' =>

It really starts to look like an V12 Engine Block 

Just thinking out loud - would using the Thread-Mill you do have and use it as 'a Start-Tap' (not making the Thread deep enugh) - help you cut the finished Thread later ...?

Per                  

[Art K]

Achim,
I was glad you are not tapping all those holes shown in the first photo of post 35 by hand. I must admit never trying thread milling, bucket list item.
Art

[fumopuc]

That is looking fantastic so far, Achim. You are making excellent progress!
You don't want to tap 112 holes all by hand? Why not?

Thanks Ron.
I am very happy, that I have discovered the thread milling with Fusion360 some time ago.
A good cutter with i.e. the range from M2,5 to M4 is not really cheap, here around EUR 40, but I think it is wort each cent.
With four different cutters only, it is possible to cut from M1,8 to M10.
For M1,6 and M2 I do use Chinese cutters from a German supplier here one for each size. Price is EUR 18 or 19 each.
Maybe it time now, to invest into the next bigger size M5 to M10 and  prepare and test the CAM operation for it.

[fumopuc]

Just thinking out loud - would using the Thread-Mill you do have and use it as 'a Start-Tap' (not making the Thread deep enugh) - help you cut the finished Thread later ...?

Per                  

Per, thanks.


To do it as you said is the common way I do handle longer threads. With smaller sizes mostly not necessary, due to the length of the cutters. Here with the cutter for M2,5 to M4 I have hit the limit, forced by the unusual lower shape and the additional 30° inclined surface of the cylinder deck.

[fumopuc]

Achim,
I was glad you are not tapping all those holes shown in the first photo of post 35 by hand. I must admit never trying thread milling, bucket list item.
Art

Hi Art, thanks for pooping in.
Try it, you will be surprised how easy it is.
Your Tormach will be happy to do it for you.