lfmarini
I can understand why you're confused. I was designing a machine to grind the surfaces of the bars themselves. A hopkinson bar test rig wouldn't require any sort of gearbox.
Sorry to confuse you
Ah. I haven't been clear. Forgive me.
The gears are separated from the grinder by a plate. The grey cylinder (in my first image) holds the gearing and is sealed on both sides by a plate. The grinder protrudes from a hole in this plate. The blue cylinder is used to hold the bar stationary and...
Its true that 0.5 of a degree doesn't seem very precise, but this is the level of accuracy required on the surface that the machine will be grinding. Obviously more accuracy is always best, but 0.5 is Worst case.
As for why I need to get inside, An offset epicyclic gear is installed in the...
I'll have a word with the turners, but they didn't have a problem with some of the more complicated things i requested, so it should be fine. Thanks guys, Very much appreciated.
I'm still keen for other suggestions though.
Thanks for all the suggestions. Unfortunately I'm only going to be making a couple of these so casting them would be too expensive for my budget. I have turners readily available who can do the work for no charge, thats why I'm taking this route. Also (sheesh I'm being really picky here, sorry)...
Yeah, shrink fitting might work, but its beyond my means. I don't have any way of heating the cylinder, and even if i did, i would have no way to assemble it while hot. I'd like to find a purely mechanical solution if possible. Good idea though. Thanks anyway
Oh yes, for the accuracy the two center lines will have to accurate to within less than half a degree.
The reason for this is that this machine is to be used to grind the surface of a Hopkinson Bar test rig which relies on stress waves to produce data. So if the surface finish is not...
The whole device weighs 10.5 kg and I'd like to keep it below 11. Unfortunately this connection also carries all of that weight in a cantilever as in the picture below. The bar is fixed and a collar connects it to the blue casing. Everything else is left hanging. Because of this a simple press...
I'm in the process of designing a small bar end grinder. The device has two casings: one which holds a gearbox and another which holds the bar to be ground. These could not be machined from one piece of material and so I need a way to fix them together so that they do not move relative to one...
