Clubman7 21st April 2014, 02:05 PM Pics of a mandrel casting I milled recently.
Was cast in 4140 steel.
http://i925.photobucket.com/albums/ad100/clubman7/15cc80756e0dc5e0587da6d8bb1243e7_zpsda41b7be.jpg
http://i925.photobucket.com/albums/ad100/clubman7/1adcc4bfd8569e9c25242cf9535c20e6_zps0767d24b.jpg
http://i925.photobucket.com/albums/ad100/clubman7/bbbcaab1e34f3466781f70d95d5ea598_zps94e49576.jpg
http://i925.photobucket.com/albums/ad100/clubman7/b9bde5659c97ccb0a8faaa30592ec087_zps50a8c15a.jpg
http://i925.photobucket.com/albums/ad100/clubman7/641c54fe7dd28cd7543e082c444286fe_zps8e305a06.jpg
.RC. 21st April 2014, 04:50 PM Nice... What sort of HBM is it?
RayG 21st April 2014, 04:59 PM Interesting looking job, nicely setup.
I'm trying to guess what the part is for, some sort of cutting or drilling head?
Ray
Clubman7 21st April 2014, 05:31 PM Part is a mandrel core that has three segment leaves fitted to it for roll steel strip.
Expands and roll strip onto, then compress and remove roll.
Core is pushed along shaft to expand and compress segment diameter.
Leaves are fitted onto tapered ramps.
jhovel 21st April 2014, 06:05 PM Any chance of a photo or two assembled and/or in action?
How gig is that piece? I can't find anything conclusive in the photos to really scale it to...
Clubman7 21st April 2014, 06:47 PM Unfortunately it went out to customer for assembly.
it was about 1600mm long and 400 dia.
Ueee 21st April 2014, 07:06 PM So about 3 times the size that I thought.....
Nice job, was it all done with carbide? Do steel castings get a hard skin on them like CI does?
Ew
Keith_W 22nd April 2014, 07:29 AM Great job Clubman.
Looks like there were multiple setups to machine the various faces. Did you turn the ends on a lathe first or did all the work on a boreing mill, would have been nice to see a set of pictures of each step of the operation.
Regards,
Keith_W
KBs PensNmore 22nd April 2014, 08:39 PM Nice home workshop:D. Interesting job, do you do this sort of thing often??
Kryn
Clubman7 22nd April 2014, 10:30 PM Have machined a few different designs over the years.
Followed this one with a slightly smaller cast iron version.
Being cast steel it didn't really have a tough skin to machine through, although most cutters were carbide because of toughness of material.
End diameters and bore were machined first, then outside machined concentric to bore.
Castings can be fun to machine sometimes.
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