Annaealing

[airone46]

Has anyone ever tried to do the annealing with an induction machine?

Has anyone ever tried to do the annealing with an induction machine?
It should be simple, and a thermocouple applied to the base of the shoulder would immediately interrupt the current as soon as it reaches a temperature that is too high and harmful to the body brass

[GregLaROCHE]

That’s an interesting idea. Hope someone has or will try it.

[airone46]

Two cartridge heaters are inserted in an aluminum heating plate "A" with a thickness of about 2 cm, which heat the plate to about 800 ° F by means of a PID.
The plate is mounted on a support "B", in which a ram runs that supports a shell holder in which the brass must be inserted.
On the support B a second thermocouple 2 is mounted that measures the temperature of the brass body and is connected to a second PID calibrated at about 400 ° F: as soon as the brass shoulder reaches the temperature of 400 ° F the PID alarm is triggered ( ringtone - led).
At this point we lower the ram, we extract the cartridge case and insert a new cartridge case for annealing.
The system allows precise adjustment of both neck temperature and brass shoulder / body temperature.

http://i66.tinypic.com/24edkjp.png

[GregLaROCHE]

I think you have a really good idea, at least in principle. It’s similar to the method of dipping the case neck into melted lead. How long do you think a case will be heated, before you can do the next one? I assume you leave the resistance on all the time.

I don’t think you would really need a shell holder. A round cup to sit the shell in and maybe have it on a hinge that you can tip to the side dumping the shell into a water bath to quickly cool it.

You would have to account for different diameter and length of cases, but that could come later.

Maybe you need to start thinking of a patent? Good luck and keep us posted.

[mikeatl]

Induction annealing is already being done. Try a search for info. Thanks Mike

[dragon813gt]

https://fluxeon.com/

https://www.ampannealing.com/#

It’s been done for years and there are retail units available. The problem w/ homemade setups is duty cycle and cooling. It’s doable but if you want to have any production capacity you’re going to spend a good bit of money.

[country gent]

Look at Annie annealer it has been used on the girard annealers.

[airone46]

But you have seen the price !!!
Annie Induction Annealer
$484.00 – $547.00

Introducing the Annie Induction Annealer!

This heater was specifically designed to anneal brass rifle cartridges in preparation for reloading. With over 1200W of induction heating capacity, most cartridges will anneal in about 3 seconds.

Stop the guesswork with your torches. Anneal with confidence!

PLEASE SELECT Primary Voltage:
230V 50/60Hz
120V 50/60Hz
Clear
$484.00

An induction circuit costs a few euros! And then you need a very low power!
https://www.amazon.it/KKmoon-Macchina-Termica-Induzione-Frequenza/dp/B01FLXZOFG
(1.000 Watt)
I have seen that there are companies that wrap coils with a single coil: I think the ideal!
https://cdn2.hubspot.net/hubfs/508263/Ambrell_PDFs/411-0168-14.pdf?t=1473449351249
A thermocouple inserted in a pilot and connected to a PID should be able to indicate the neck annealing temperature. If you want a second thermocouple resting on the shoulder / body of the casing marks the temperature in this area! Otherwise just make a heat sink that contains the body of the brass, and you would never have dangerous temperatures in this area!
It should all be very simple and it should work!

The PID should turn off the induction loop as soon as the temperature reaches the set value.

[dragon813gt]

But you have seen the price !!!


Yes, I’ve seen the price. There’s a couple reasons for it. One is they’re a company trying to turn a profit. Second is quality of parts. Third is duty cycle. It can take ten seconds to anneal a 50 BMG case. If you think you can do it w/ a lower power unit it’s going to take longer. And those lower power units either can’t run that long or will have a long cool down period afterwards.

If you wan to build one go for it. There are people on this board that have. They’re not hard to build. But they have limited production capacity. Even the ones where people added liquid cooling

[airone46]

Thank you for your precious explanations!
There are more powerful circuits like this
https://www.amazon.it/SODIAL-Riscaldatore-riscaldamento-induzione-riscaldatore/dp/B07DXLWFDK/ref=pd_sbs_60_4?_encoding=UTF8&pd_rd_i=B07DXLWFDK&pd_rd_r=259772a8-e4d1-11e8-bc59-35fea659c2f4&pd_rd_w=nosO2&pd_rd_wg=58qT3&pf_rd_i=desktop- dp-sims & pf_rd_m = A11IL2PNWYJU7H & pf_rd_p = 466c5af4-0171-4b17-9b3f-b4036a90f75d & pf_rd_r = R8FKY3YTEQ47EYM2XGKX & pf_rd_s = desktop-dp-sims & pf_rd_t = 40701 & psc = 1 & refRID = R8FKY3YTEQ47EYM2XGKX

The "small" 1200 watt circuit costs $ 547, the 1,800 watts for 50 BMG costs $ 1,120 (for voltages of 220 V).

[popper]

That idea for a commercial ( bulk) annealer would be slow. The cakepan/gas design would be faster - don't know how well it handles rimmed brass. Only problem the induction unit solves is case rotation. Only problem with gas units is location of neck with respect to flame. The drill/socket method works but getting the neck in the flame properly each time is touchy.
If I were to make a home gas unit, a case holder cylinder on a swing arm with a bevel gear drive. Swing the arm away to load & unload, drop into fixed position to anneal with rotation via bevel gears. Hand crank or motor driven.