MACHINING A SOCKET DRIVER
MACHINING A SOCKET DRIVER
(OP)
How would they machine a socket driver? When I look at a socket on the back side the square socket side, the angles are very sharp with maybe a very slight radius, whats the standard procedure to machine this? I see some radius on these look to be less than 2mm even, how can they get that deep with such a narrow bit? I am designing something similar but I am not 100% sure on the bit size or depth etc, is there an ASME standard or machining drawing to cover radius etc. maybe a radius to length of flat ratio or something?





RE: MACHINING A SOCKET DRIVER
RE: MACHINING A SOCKET DRIVER
but could be machined.. broaching/milling/turning for one offs.
https://www.youtube.com/watch?v=RtcYB-mW6i0
RE: MACHINING A SOCKET DRIVER
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
RE: MACHINING A SOCKET DRIVER
The part was probably made by driving a machined square into a soft bar, i.e. cold forming, and then heat treating after the shape was pretty much complete.
You can get the appearance pretty close with EDM.
Perhaps it would help if we knew what you are trying to do, and how many tons of such parts you need.
Mike Halloran
Pembroke Pines, FL, USA
RE: MACHINING A SOCKET DRIVER
RE: MACHINING A SOCKET DRIVER
RE: MACHINING A SOCKET DRIVER
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: MACHINING A SOCKET DRIVER
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
Drill 4 holes at the corners, first.
Then plunge a big endmill right down the center to remove most of the mass.
Then change to a somewhat smaller endmill, mill a square around the round hole,
then change to progressively smaller endmills and mill progressively larger endmills,
and maybe finish by pushing a one-step broach down the hole to smooth the square.
OR, plunge an array of circular holes,
then plunge another array of smaller circular holes in the interstices,
and recurse until you can knock out the remaining stuff with a chisel or a small endmill.
In really old toolsets, you will find a drilled hole slightly larger than the square, right down the center of the square, straight broached sides, and tightly curled chips left behind by the broach, still packed into the bottom of the hole, fifty or more years later.
It's probably best to just specify a minimum depth of the square hole, a maximum corner radius or a note about a maximum relief, and a minimum solid thickness of the web beyond the end of the square cavity.
I tend to get sucked into super- detailing a solid model, making believe I actually know the best way to make what I want, until some old machinist sees my print, spits on it, and then shows me a better way. ... or doesn't show me, but just asks what features I really need, and goes ahead and makes a better part for less investment than I could ever imagine.
Mike Halloran
Pembroke Pines, FL, USA
RE: MACHINING A SOCKET DRIVER
They don't allow for tolerance etc. but illustrate the point hopefully, in each case let's assume the corner was pre drilled by 2 mm bit before machining the pocket - only location varies.
Now there is no free lunch, the more of the 'square' wall material you remove the less you have to resist the Brinelling from your square drive etc.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
Bill
RE: MACHINING A SOCKET DRIVER
RE: MACHINING A SOCKET DRIVER
Is 303 'strong' enough to resist the Brinelling from your applied load?
Will this part be removed often etc. or one shot deal? Think of the impact of the actuation and insertion etc. on the plating.
Is your primary load in one direction, or is torque similar both directions? The corner relief I showed bottom right can work OK in unidirectional applications.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
304 stainless should be strong enough, essentially it will be fitted into place then wont be taken off, nots sure of exact torque, the handle that came with the valve is pretty tough to turn. The load is rotational 90 degrees on y axis clockwise or counterclockwise depending on the flow direction. So your saying 2mm not corner relief just a radius is better then the relief in the top right which is what I am using now? in your bottomr right pic the hole is tangent with the bottom edge but offest right
RE: MACHINING A SOCKET DRIVER
This is a one-off?
Is there something holding you to a square socket shape? Could you just choose a different geometry that is much more practical/profitable for a limited production run, and not hold you to geometry typically reserved for processes that are only practical for high-quantity runs?
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: MACHINING A SOCKET DRIVER
Looks a bit ugly, but gets the job done with less than 5.00 in tooling, and another 2.00 dollars for the steel rod.
RE: MACHINING A SOCKET DRIVER
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: MACHINING A SOCKET DRIVER
https://www.youtube.com/watch?v=RtcYB-mW6i0
RE: MACHINING A SOCKET DRIVER