HOWE TO MACHINE THIS? WITHOUT CAST

[imagineers]

This part looks machined, not cast, although many of these kind of parts looks cast.

 

[looslib]

Multiple setups required.
Start from a solid block.
Cut into 'L' shape
machine one connector
machine second connector


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[KENAT]

imagineers, what about it looks inherently cast?

I'm guessing start out with squarish cross section "L", then turn down and bore each leg as need be.

You could potentially cast in barb features, and the round leg to subsequently thread but I'd be a little surprised if the bores or thread were cast. Also if cast I'm not sure I'd expect the 'corner' portion to be quite as square.

Looks like there may be machine marks on the bores & barb but can't be sure at the resolution of image you provided.

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[imagineers]

I have seen a lot of cast parts like this, but this one looks machined, I just wasnt sure how. Thanks for your answers guys

 

[BrianE22]

My guess is it is done using bar stock and a rotary transfer machine.

 

[arunmrao]

My gues, it could be cast and then machined. Thus, we do not see the usual cast signs.


"Even,if you are a minority of one, truth is the truth."

Mahatma Gandhi.

 

[maripali]

I guess it is made on the lathe with the four cams gripper that are able to move separately. And the blank were cut as "L" shape from the sheet.

 

[Compositepro]

Modern CNC machine tools with "live tooling" and swiss screw machines with a bar feeder can make these parts from bars of raw material with no operator involvement.

https://www.youtube.com/watch?v=NLAW69DaysI

 

[3DDave]

Nice thing about not casting little parts - not having porosity from casting. I've had hose-bibs with pinhole leaks from cast porosity. They sealed from corrosion after a short time, but how irritating.

 

[MikeHalloran]

As noted, automatic machines can make parts like that from rectangular bar stock.
It's even cost- competitive, because you can buy brass on a net-use basis (Collect, wash and dry the chips and the supplier will buy them back.).


Mike Halloran
Pembroke Pines, FL, USA

 

[capnhook]

A prominent scuba valve and propane tank valve manufacturer's employee profit-sharing plan was once based on the brass chips that were collected each month.

But that benefit was "clawed back" about ten years ago.

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[KENAT]

Not exactly an incentive to minimize waste during machining;-)

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[3DDave]

Even with waste buy-back, there is still some consideration for cycle time, number of tools, and other financial limitations. They might get back all the money spent on the chips, but they won't get back anything spent on making the chips.

 

[dshore]

It looks like a brass forging to me.

 

[MikeHalloran]

It could be a forging, but there's no way to verify that it is.

Near net shape forgings are normally left unmachined in an area where you can see
the heavy flash that extrudes out from between the dies,
as opposed to the slight mismatch at the cope/drag interface
that's characteristic of castings.

It could have been made from a forged bar, but you'd need certs
to have some assurance of that.



Mike Halloran
Pembroke Pines, FL, USA

 

[silveringchap]

It looks like it has been made from solid bar, possibly in a rotary transfer machine. I worked in a hydraulic fittings factory and Ive seen an item similar to this where the threaded portion was machined and thread rolled into a round bar, a bore was machined in the side on 2nd op and a barb was brazed in separately by the part being assembled with a braze ring and the whole assembly then being heated so the ring melts and forms the joint. However they were steel fittings, and there is no evidence of this in the photo.

 

[imagineers]

Thanks for all the comments, I think it was machined also

 

[ornerynorsk]

silveringchap is correct. These are machined from solid on a transfer machine. Brass fittings are generally not brazed or "assembled". they're one piece.

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.