[robbi01]

Hello

I want to mill a 8H8 drilling including a chamfer into the part that is to be processed-however I really don’t know if it’s possible to mill the 20 degree chamfer and the changeover of R1,5.
Please HELP me out because turning would be a total disaster considering the price that our boss established...

[MosiN]

How many parts do you need to process and how urgent is the order? We have a special VHM miller
(20°/r=0,8) for these cases. In our processing, it’s important that the joint ring or rather the
back up ring from screw-in cylinders don’t get damaged- that why we need the transition.
Do you care about the sealing function or the surfaces quality?

[Stefan21178]

Of course you can mill that!
What tool did you wanted to use?

It's best to use a radial miller which you can use to run over the contour in X,Z.
After each run you can turn the coordinate system a bit further.

[robbi01]

Of course you can mill that!
What tool did you wanted to use?
Its best to use a radial miller which you can use to run over the contour in X,Z. After each run you can turn the coordinate system a bit further.

Hi
Yes, I was thinking about a 3mm radial miller. But I don’t know how to program it.

I am only working with the Heidenhain 620 for 5 months now- before I was occupied with the turning of parts.

I have seen something similar with Q parameter and angle functions but I don’t have a clue how to program it. I am scared that I fail to get the RZ 6,3.

[rodeopeter]

If you often have to process this form or similar ones - that means user defined angle and user defined radii that pass over drill holes - then it’s worth getting a program because you have the flexibility to change it as you like.
Are you interested?

[Stefan21178]

Sorry for the late reply.
I have quickly created something.
PGM only works with a 3mm ball cutter that was measured on the tip.
Row 15 and 16 give a Rz of 6,01


0 BEGIN PGM schr20rad15 MM
1 BLK FORM 0.1 Z X-7 Y-7 Z-5
2 BLK FORM 0.2 X+7 Y+7 Z+2
3 ;3mm ball cutter
4 TOOL CALL 67 Z S2500 F250 DL-Q108
5 L X+3.6177 Y+0 R0 FMAX M13
6 L Z+10 R0 FMAX
7 L Z+1.5 F AUTO
8 LBL 1
9 L X+3.6177 Y+0 Z+1.5
10 L X+2.6809 Z-1.0739
11 CR X+2.5 Z-2.1 R+3 DR-
12 L Z-2.6
13 L X+0 Y+0 FMAX
14 L Z+2 FMAX
15 CYCL DEF 10.0 TURNING
16 CYCL DEF 10.1 IROT+4
17 CALL LBL 1 REP89
18 CYCL DEF 10.0 TURNING
19 CYCL DEF 10.1 ROT+0
20 L Z+150 FMAX M30
21 END PGM schr20rad15 MM