Crowndroyal
Plastic
- Joined
- Jun 3, 2019
- Location
- Sarnia
Working on a project, which is a tube sheet that is carbon with titanium clad. Cladding is about 0.500 (+/-) 0.050.
Spot drilling the titanium to depth till I hit carbon at 752 rpm and feed is 4.2 with 0.760 iscar tip, carbon is then drilled at 1800/18 with a 0.759 Kena tip ( don't ask why ) Tolerance on holes are 0.758 +0.004 -0.002.
The ( GO/NO GO gauge ) wont go through the majority of the holes, it either stops near the top of the hole or near the bottom almost never in the middle of the hole.
any suggestions on changes for speeds and feeds ?
I have suggested drilling and reaming/honing or using a flex hone suggestion being ignored.
Spot drilling the titanium to depth till I hit carbon at 752 rpm and feed is 4.2 with 0.760 iscar tip, carbon is then drilled at 1800/18 with a 0.759 Kena tip ( don't ask why ) Tolerance on holes are 0.758 +0.004 -0.002.
The ( GO/NO GO gauge ) wont go through the majority of the holes, it either stops near the top of the hole or near the bottom almost never in the middle of the hole.
any suggestions on changes for speeds and feeds ?
I have suggested drilling and reaming/honing or using a flex hone suggestion being ignored.