Enjoying drilling exotic metals;)

[khalid]

Hi Guys,
Been busy in retrofitting a Radial drill machine and now making use of it.. Currently drilling Tubesheet and baffle plates of exchangers..

Material: SS316
Material thickness: 30mm
Drill Material: HSS
Drill Dia: 8mm and 10mm
Drill Depth: 34mm and 55mm
Spindle Speed: 800RPM
Feed: 1.37 IPM
Peck Drilling Cycle: G73 and G83

Here is the Radial drill conversion
http://www.cnczone.com/forums/showthread.php?t=105247

and here is the video
http://www.youtube.com/watch?v=FH2X_W2MHBY

[ghostcreek]

Khalid, as usual I am impressed. What a great idea, any downsides or troubles you encountered? Great work my friend, thank you for sharing.

[khalid]

Hi,
I did this conversion just to take the feel of milling and drilling exotic materials... As this is a Radial drill, so currently the milling results are not that good.. The clearance between the drill quill is 0.2mm and i am getting this error while milling..
Currently planning to remove the Radial arm along with the Spindle and fabricating new spindle and Vertical column...

[donclifton]

What are you using the heat exchangers for? How are you going to fit the tubes to the plates?
Thanks
Don C

[khalid]

Hi Don,
This heat exchanger is Lube Oil Cooler of Co2 turbine+compressor....

1- We require
a) Baffles
b) Tube sheets
c) Spacers
d) Tie rods
e) Sliding Rods
2- We will make Cage, of Baffles , tube sheet, tierods and spacers..
3- Then we will insert tubes
4- Then we will weld the tubes with the tube sheets
5- The complete Tube Bundle will then be inserted into the Shell...