Anyone interested in making this part...

Threemorewishes

Threemorewishes

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Ottawa Ontario Canada
Hello all,
I have a part that is made out of some kind of plastic that I would like to reproduce it in various metals (aluminum, brass and steel). My limited knowledge of shaping metal makes me think that a CNC machine would be the way to go. I have a sample part and these pictures but do not have anything else (except $) to help a machinist in creating the copies.

From the collective experience on this board what pieces of the puzzle could I provide to help keep the unit cost as low as possible. Some of the features on the part can be simplified or excluded if they do not hamper the funtionality (example: the large screw slot on the front is decorative).

How much time is involved in generating the code for such a part on a CNC machine? Is this a big part of the unit cost? Do machinist accept code from outside sources to run on their machines? Would it be feasible for me to generate the code and provide it to the machinist?

Thanks for any input you may have.
Greg

band9.jpg


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band5.jpg


band10.jpg


band12.jpg
 
Crosman Multi-pump Pneumatic pump arm pivot/ barrel clamp assy?

2289? 13xx series?

Looks like a minor PITA to set up for, with a lot of wasted off material to get it in one go from solid.

Unfortunate part of that, is that the machines that can make the part, are some of the more expensive units out there, able to turm and mill with live tooling. On the other side of it, the part could be set up and run on a CNC mill with a couple jigs. Think in terms of a mill cutting the outside of the round bits, instead of turning them, eh!

I'd suggest that you would be best off to find a program that would allow you to generate a 3D solid model of the part, and save that model in a format that is fairly common, so that it could be imported directly into the software in use in the shop that you choose. Their program will produce the code required, and it will run on their machine for certain that way.

Way easier for them to build your part the way you want it, than to get your code to run on their machine.
Make sure that you do not ask for tighter tolerances than you need. More decimals = higher cost.

Cheers
Trev
 
I would want to be comfortable with my market for the product as most CNC small part runs have a rather high minimum piece count.

good luck

240
 
How many you want to make might dictate the economies of the various methods by which it could be manufactured. You might want to start out with simply a blueprint or cad drawing and get some opinions as to manufacturing cost. Don't waste your time trying to write G codes for the item. What runs on one machine won't necessarily run on another. Another machinist might have a different take on how to tackle the job, and no one is going to just run your code on their half a million dollar machine without taking time to run through all of it and see that it doesnt' crash their machine.
 
How many pieces did you want to get produced? That will be a big factor in deciding if it is economically feasible. I would think you need a run of at least fifty parts.

You have to realize too that there are features on this part that are easier to do in plastic injection molding rather than machining out of metal. That cut for the screw to collapse the I.D. is one of them although it could be done by hand.
 
An injection mould to make this part would be cost prohibitive. Injection moulds are extremly expensive. Unless you are planning on mass producing. But if that is a route you are considering I might be able to help you out. :D
 
If it is a one off piece, the simplest would to be to make it
by hand, grindes, files etc, wrong time of year for meto do something
like that
 
CNC operator would need clamping systems and would have to purchase tooling ( mill ends, taps etc ) to create this also as someone else mentioned needs all the dimensions to see if the machine they are running is capable of producing this product. May have to do it in stages which means more clamping of different types which can be made right on CNC but would still need CADS for those. Lot of Variables but could be done.
 
I will send you a PM

Threemorewishes said:
How much time is involved in generating the code for such a part on a CNC machine? Is this a big part of the unit cost? Do machinist accept code from outside sources to run on their machines? Would it be feasible for me to generate the code and provide it to the machinist?
Click to expand...

Yes, we have a cnc that can do it but we need to talk about costs.

I will send you a pm with our 1-800 number so that we can communicate.

Regards
Robert
 
A two part solution might be acceptable. Some of the detail can be simplified like the next picture. 5/8" rod and 3/8" plate. The plate will not have to be slotted if the rod piece is long enough. The distance from the back of the plate to the roll pin hole in the rod is not too important. In a perfect world the two pieces would be soldered together instead of fixed using a set screw.

barrel_band.jpg
 
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The back of the slot on Part B does not need to be milled flat. The cutter radius can be left. The 3/16 hole perpendicular to the slot can be omitted.

Part A can be left as a rectangle and the set screw hole can be omitted as well.

Part A Front
partafront.jpg


Part A Side Top Bottom
partasidetopbottom.jpg


Part B Side
partbside.jpg


Part B Top
partbtop.jpg


Part B Front
partbfront.jpg
 
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