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Author Topic: spring manufacturing?  (Read 2297 times)

Roper1911

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spring manufacturing?
« on: March 04, 2017, 04:56:12 pm »
I've been chatting with Axel Müller (troubleshooterberlin, the guy who built the top loading Remington 11.) about a problem he had with his custom hammer springs taking a set after a few rounds and needing to be replaced. I sent him information on spring stress relief to keep the springs from setting so quickly and he told me that it didn't work.
I for one am stumped.
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    freeman1685

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    Re: spring manufacturing?
    « Reply #1 on: March 04, 2017, 05:02:06 pm »
    It's likely a tempering issue.  The metal isn't being heated hot enough, or long enough to get a sufficient temper.
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    coelacanth

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    Re: spring manufacturing?
    « Reply #2 on: March 04, 2017, 10:33:16 pm »
    Probably as much a design flaw as it is a tempering issue.   :hmm   You have to design any part to work withing the performance parameters of the chosen material, otherwise you can expect a high failure rate.   Spring tempered steel doesn't like to be stressed beyond the limits imposed by its alloy composition and shape. 
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    tokugawa

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    Re: spring manufacturing?
    « Reply #3 on: March 04, 2017, 11:00:32 pm »
     "practical machinist forum" would be a good place to start asking. There are some very sharp metallurgists/machinists there.

    JesseL

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    Re: spring manufacturing?
    « Reply #4 on: March 07, 2017, 04:18:47 pm »
    Probably as much a design flaw as it is a tempering issue.   :hmm   You have to design any part to work withing the performance parameters of the chosen material, otherwise you can expect a high failure rate.   Spring tempered steel doesn't like to be stressed beyond the limits imposed by its alloy composition and shape. 

    ^THAT

    Springs are tricky little SOBs. Strength is determined by the thickness of the wire, travel (and consequently where you push them past the elastic limit) is a matter of how many coils you have.

    Odds are he needs more coils on his spring, and if that won't fit he needs to make room for a longer spring.
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    Roper1911

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    Re: spring manufacturing?
    « Reply #5 on: March 07, 2017, 11:51:40 pm »
    it's a torsion spring, so to get more coils he'd need thinner wire...
    North Carolina"it has two fire modes, safe, and most decidedly unsafe"
    ~Chief Warrant Leon McMurdo. Shilo Mountain Rangers, sixth battalion. Mount Hector School of Military tactics. November 8th 3451.

    Yes. When the question is 1911, the answer is "yes". ~HVS

    JesseL

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    Re: spring manufacturing?
    « Reply #6 on: March 08, 2017, 12:33:27 pm »
    it's a torsion spring, so to get more coils he'd need thinner wire...

    Can he go to a larger diameter with the same number of coils? It's basically about using a longer wire.
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    Roper1911

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    Re: spring manufacturing?
    « Reply #7 on: March 08, 2017, 01:29:28 pm »
    Maybe? I think he's using 2mm wire...
    North Carolina"it has two fire modes, safe, and most decidedly unsafe"
    ~Chief Warrant Leon McMurdo. Shilo Mountain Rangers, sixth battalion. Mount Hector School of Military tactics. November 8th 3451.

    Yes. When the question is 1911, the answer is "yes". ~HVS

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