Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by Orange_kun

  1. Orange_kun

    Hydrogen Embrittlement ASTM A574

    To me, they all look like they failed at random thread root locations. Considering that the shoulder bolts have the same threadform, but haven't ever (?) failed, and also seem to look consistently less corroded... I would want to know 3 things: 1. Are the fully threaded bolts confirmed to be...
  2. Orange_kun

    Where to buy exotic steel alloy bars in low quantities?

    I really liked using Rolled Alloys up here in Canada. I think they tend to be more nickel and high-temp alloys though.
  3. Orange_kun

    Spring Modeling Help (Solidworks)

    Basically, Mcmaster has used 3 curves to make the spring. 1 for the main body and 2 separate helixes for either end. Then they stich the curves together, sweep the complete curve, and use an extrude cut to grind the ends. Not too hard to do, and you could still make it parametric. But it does...
  4. Orange_kun

    How to find the amount of precambering to be done before welding to avoid distortion?

    My old roommate is a metal fabricator. He would routinely estimate the deflection of steel and stainless steel parts when he was going to weld them. Like, to better than 20 thou when dealing with 6ft lengths. Usually, the fab process would focus on tack weld location and layup configuration to...
  5. Orange_kun

    Bolts in Shear on Circumferential Bolt Pattern

    Honestly, this just seems like such an odd way of retaining it. When designing test fixtures, I've never been told I HAVE to use part features, unless those were the features specifically being tested. You're trying to design a rather complicated joint for... why? To use features of a part that...
  6. Orange_kun

    Bolts in Shear on Circumferential Bolt Pattern

    There's no way to make a flange that gets bolted vertically to back up the orange cylinder? Why are you being forced to use it? What is this device doing? I have never encountered a bolted joint like this. Put threads in a cylindrical surface, whereby the fasteners all compete to distort the...
  7. Orange_kun

    Bolts in Shear on Circumferential Bolt Pattern

    As others have said, I'll tell you right now... that won't hold pressure for long. It wont't be super round, I haven't heard any mention of an elastomeric sealing element, and I don't see how you're sealing the bolt clearance holes. I would recommend looking up a design guide for face sealing...
  8. Orange_kun

    How to fix a planetary gear

    Doesn't look like it to me. You are concerned about the operator overloading the radial capacity on the gearbox input? Dunno what that capacity is, or who's using it, and how often. I'd be concerned about it as well.
  9. Orange_kun

    Force Required to Crush a Tube

    The KISS rule is 3 or 4 mesh elements across a wall thickness. Your mesh is horribly coarse, unless that's just ANSYS displays it. EDIT: I'm usually running garbage Solidworks Simulation, but I'm not sure that Explicit Dynamic is the best simulation type for this scenario. ANSYS describes it as...
  10. Orange_kun

    Are Linear guideways overkill in this design?

    ? You don't need more than 2 rails. Mount 2 carriages on each rail. And consider finding some shorter length carriages if things are super close. Or make your platform bigger. Have you calculated the torsional moment that will be acting on the carriages to keep the plate flat when the green...
  11. Orange_kun

    Are Linear guideways overkill in this design?

    Not sure if this is relevant, but when designing things with plastic guide bushings, you need to achieve a specific minimum aspect ratio if you're using 4 blocks on a platform, otherwise you risk binding due to overconstraint and bearing play. IGUS has a good guide about designing with plastic...
  12. Orange_kun

    How to fix a planetary gear

    Or if you really don't want to deal with verbal communication (and sometimes incorrect info at that), reach out to the gearbox vendor. Or the manufacturer. They will have a document describing the best way to use their device.
  13. Orange_kun

    Pneumatic Differentiator

    To me, it looks like the differentiator will act to limit the rate of change of pressure in the inlet. If inlet pressure tap rises too quickly, the screw adjust needle valve damps flow to the spring loaded side of the differentiator. This allows the pressure spike to move the piston (up, as...
  14. Orange_kun

    Confusion about positional tolerance for rectangular pins

    You want as many datums as you need. A turned, radially symmetric part? 2 might be fine. A cast and post machined frame with many secondary features to mount other components? You might have dozens of datums. Generally, for a 3D part, 3 datums is a good starting point. Remember, the datums...
  15. Orange_kun

    Design

    I've seen such a condition successfully repaired by drilling out the old holes, adding weld buildup to the enlarged holes, and retapping to the original thread size. Not sure what material you have, and how well it accepts the heat. This was on some nickel alloy that was relatively insensitive...
See more

Part and Inventory Search

Back
Top