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  • Users: GogiBOB
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  1. GogiBOB

    will nickel coating metal springs increase the stiffness?

    Hi, My boss is getting nickel coatings on metal springs with the thickness of 5 mils. This is only 0.005". My boss thinks getting nickel plate coating on springs will increase the stiffness. However, I am not so sure if 0.005" of nickel coating will have any significant impact on the spring...
  2. GogiBOB

    Cadmium plated bolt vs Sodium Hypochlorite?

    Hi, I am trying to find if Cadmium plated bolt can be used in the environment where sodium hypochlorite presents. I can't find any information regarding Cadmium's corrosion resistance on web. Every website states that Cadmium finishing has excellent corrosion resistance but there is no detail...
  3. GogiBOB

    Higher silicon contents in Hastelloy C276?

    We just got SGS's test result from our Hastelloy C276 rods supplier and the test result shows 0.2% of silicon contents in the alloy. The standard spec says the maximum silicon contents is 0.08%. The spec on the website also says "The undiluted deposited chemical composition of alloy C-276...
  4. GogiBOB

    looking for weldable, anodizeable castable metal alloys?

    Hi, I am looking for castable metal alloy that can be welded as well as anodized. Aluminum 712 seem to be good choices from what I've researched so far. Is there any other choice of metal alloys? I would appreciate any comment or thought! Thanks,
  5. GogiBOB

    Designing a rotameter ?

    Hi, I am working on a project for designing different flow meters. I am designing a rotameter alone. I did some homework and studied equations about fluid meters and mechanics but I am still not sure of where to begin. The principle is simple but all the articles I've read only explains basic...
  6. GogiBOB

    choosing material for threaded rods??

    Hi, I need yield tensile strength of 95k~120kpsi for 7/16" threaded rod or 60~75kpsi for 1/2" threaded rod. I would prefer smaller sizes but I can't find material with enough tensile strength. Another thing I am considering is corrosive resistance. Can anyone give me any advice on choosing the...
  7. GogiBOB

    Stress Analysis: Contraint/contact for threads?

    Hi, I am trying to do stress analysis with a threaded rod and a plate. I manually cut threads to model real threads so that I can figure out how much force it can withstand without deformation. Please refer the screenshot I attached. The plate should be able to move up and down as the rod...
  8. GogiBOB

    How do I calculate the force on a threaded rod?

    Hi, I am trying to calculate how much force can my threaded rod withstand. My 5/16-18" 304 S/S threaded rod is inserted into the metal plate of 0.25" thickness so there are 4.5 threads inserted in the plate. There's upward force from the center of the plate which is 0.95" away from the rod...
  9. GogiBOB

    asking advice as a new grad

    Hi, I just graduated with a B.E Mechatronics in Canada. I've always wanted to go into space industry. However, I ended up in a small company that manufactures metering pump accessories doing R&D work as my first job. While I like people in the office and my boss I find my job boring and...
  10. GogiBOB

    New graduate, Where should I start my career for my dream?

    Hi, I am graduating in this May with B.Eng Mechatronics in Canada. My long term life goal is working in a space industry. My GPA isn't that great so I am not hoping to work for NASA or any big companies in the industry. I realize I need to gain some relevant experiences. I am an immigrant and...
  11. GogiBOB

    Back pressure valve test

    Hi, I am testing a back pressure valve and trying to plot a pressure drop vs flow rate graph of the valve. I have a setting as shown in the picture. I am going to use 1/2'' pipeline to test my 1/2'' valve. I am going to install my valve on position B and measure the pressure at PT3 and PT4 and...

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