Forming auger flights

[Hitch]

Anyone have an easy method of forming auger flights?

Split rings cut, just need forming up now

 

[Sparkey]

What does that look like???

Cool!! not only me wondering then!
VVV

 

[chunkolini]

Auger flights?
What are they then?

Chunko'.

 

[Paul.]

You'll struggle to make a true spiral, they are a true 3d shape and need stretching and shrinking at the same time, In the past i have bought them in from pressed flights, they have some fancy special tooling to make them. and cheaper than the time spent in house struggling to make them.

 

[Hitch]

They are flights, for an auger.....imagine a big woodscrew, about 250mm diameter.

 

[Hitch]

I thought the same Paul. Cheers for the link.

I imagine they ought to be hardox anyway, doubt the mild steel will last long moving abrasive blast grit

 

[Paul.]

Years ago I used to make screw conveyors for a company that turned scrap metal into an oxide used for pigment in paint, this stuff was so abrasive the conveyors were almost a full time repair job, we used to make the troughs out of a high carbon steel called red diamond, you can't get it now but it was similar to hardox, it never lasted very long though the softer mild steel flights seemed to wear better, It would be worth asking pressed flights what they recommend, I had some good advice from them for some screw elevators that we built for the snack food industry, those were moving maize grit, that's pretty abrasive as well.

 

[overload]

Worth looking at these as well.

http://www.astwell.co.uk/

http://www.bcengineers.co.uk/index.htm

 

[TechnicAl]

Ideal for hardfacing
make them from mild steel, hardfce them and then when they wear, hardface them again, and again, and again.

build en up and grind them back with a grinder attachment on a lathe

 

[Ian D]

I have welded from scratch a few of these, all bits bought in and they never seem to good fit, and the parts are very costly.

 

[snowcat]

second for hardfaceing, Have done a good few harvester ones ones in the past, quite often its the first foot or so that takes the brunt of the wear, Its common place to firstly make that of thicker material and secondly hard face that part...

 

[Hitch]

The hardfacing, whats the score with that, the outer edge, and the outermost 25mm or so, or the whole flight?

 

[Wedg1e]

build en up and grind them back with a grinder attachment on a lathe

Grinding on a lathe!? Sacrilege!

 

[Barney1973]

Used to work for a company that fabricated screw conveyors,the flights where cut round with centre hole and split and then formed in an old,very dangerous press that had various moulds depending on the flight,it had no guards so it was a case of putting the flight in,standing well back and pushing the foot pedal

 

[snowcat]

The hardfacing, whats the score with that, the outer edge, and the outermost 25mm or so, or the whole flight?

about 2/3 to 1/2 the width of the flight centers take hardly any wear, as I said concentrating on the ends, usual job butter and face, normally welding across the flight with a couple of beads in the direction of the flight on the edges...

 

[Hitch]

Put it all together today, suprised how easy it was.
Sent the rings out to be formed into the flights, didnt mess about with it.

Suggested hardfacing, but customer seems to want mild steel, with no hardfacing.....
Im wondering if its a cheap job to get it up and running then send it on its way.

No pics, delivered whilst still hot