next machine - a grashopper

[jimmybondi]

Hi,

now my next machine will grow.

normally i take some time until next build - but i got 2 flywheels - they have to be used .-)
and: some people want to see how i made such parts like cylinders - even without rotary or index table

first the difficult and long-machining part: the cylinder

a piece of dirty cast iron - everything but not angled nor straight

saw - mill - saw again - mill into a rectangular block:

the block has dimensions 42 x 44 x 50mm
takes nearly 1 hour :-(

then turning the bore and milling first side of "casting surface"
Tool: bull mill dia 5mm and corner radius 1,25mm
(normally i use ball end mill - but i don't have one long enough at the moment)

(last picture one and a half hour after beginning)

finish mill first side and rough second one:

(end of picture sequence after 3 hours)

now rest mill 2nd side, finish second and finish 3rd / 4th side

(3rd and 4th side don't get rough - they where processed on first two steps)

and finally got this on:

now the slots for valve face - pre-milled with 2mm endmill and finished with 0,8 carbide endmill:

result: a nearly casted looking cylinder:

the time to made it: roundabout 5 hours - maybe 6

hope that there came a litle bit light into what i'm doing

Frank

 

[vlmarshall]

Nice photo composition! :bow: It's great to have CNC-capable machines, isn't it? ;D

 

[jimmybondi]

Nice photo composition! :bow: It's great to have CNC-capable machines, isn't it? ;D

oh yes - without cnc a work of days :-(

Frank

 

[JMI]

Very nice!

Jim

 

[lazylathe]

Very nice work!!!
Hopefully one day i will build something that will actually work!!!

And maybe one day i will have some CNC stuff, but for now it is the old way...

Hope to see some more pics of this engine in the future!!! Thm:

 

[cobra428]

Nice Work Frank
Tony

 

[eskimobob]

Wow, thanks for the demo 8)

 

[deere_x475guy]

Yea..really impressive. Did you mill this on a manual machine?

 

[jimmybondi]

Hi Bob,

its done on a small CNC-mill
(i've postet it several days ago - but it seems that some posts are gone ? )

here's a small update:

Frank

 

[kvom]

How do you generate the program? CAM? Hand-written g-code?

 

[kustomkb]

Very nice surfacing, some beautiful parts!!

 

[jimmybondi]

Hi,

small (easy) parts are handwritten (shop-programmed at the machine)
the cylinders for example (the cast looking surface) is programmed with BobCAD/CAM (first time used it in this manner - before i've used the demo of MeshCAM because BobCAD was a mysery to me before)

simple parts for example the following "triangles" at the top of cylinder:

Frank

 

[JMI]

In a word, awesome!

Jim