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  • Users: EricatNordic
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  1. EricatNordic

    Load analysis of gantry crane on caster wheels

    We have a gantry crane that rest on caster wheels, so that each of the legs supporting the gantry are free to slide in any direction, rather then run on a track. I've been ask to estimate a safe working load for the crane. We will proof test to this load to 125% before putting it into...
  2. EricatNordic

    4" Ball Valve

    Try http://www.crtec.com/. They might have it. No association, just satified customers.
  3. EricatNordic

    engine room pressure/vaccuum

    In thread321-181668 someone commented that they believed an engine room should be slightly pressurized. I wondered everyones consensous is. I've always believed engine rooms shoulg be slightly below 1 atm because a pressure differential greater then 1 ATM would: raise engine room temps...
  4. EricatNordic

    Options 10 years after graduation

    I think you are a little unrealistic about her gloomy prospects. There is huge shortage of engineers right now, and an equally large contigency of industries, not yours apparently, who readily employ "engineers" who barely finished highschool. I've run across many of them. Those industries...
  5. EricatNordic

    Ejection Force

    Great thank you to everyone who responded. Interesting that draft angle is not included in the force equation. -Eric
  6. EricatNordic

    Ejection Force

    Does anyone know of tabels or methods to calculate the ejection force required to expell a part during demolding? I'm concerned a very fragile part may fracture during demolding. But I'm not sure how to predict it short of extensive testing.
  7. EricatNordic

    Treatment to an existing residential door for improved noise control

    Thanks Walt. That was step one for me. I stuffed towels around the loud side and taped off the inside before ever getting into the sand and foam experiment. I spent a good bit of time with a stethyscope playing different frequences and listening for primary transmission areas. Then I cranked...
  8. EricatNordic

    Treatment to an existing residential door for improved noise control

    Yes, Will use longer screws and a third hinge if I can find one to match. Even just 1/3 full the door feels like its made of concrete. Not that I would ever need such a thing, but I just imagined the WTF look on a swat teams face when they smash a door down and out comes 500 lbs of beach...
  9. EricatNordic

    Treatment to an existing residential door for improved noise control

    I had not heard of Lodengraf damping before. Interesting reading. But I haven't got the part about where to buy these materials yet. I did drill the door and tried the sand. I knew the door was cored with corregated cardboard and used a long steel rod sharpened at one end to punch through...
  10. EricatNordic

    How much do you invest in training for your job?

    How much effort outside of work do you all dedicate toward training yourself to be better at your job? This means both time and money. How much of that is paid for by your company vs out of your own pocket? I know I haven't stopped learning, but I often wonder if my skills are falling behind...
  11. EricatNordic

    Rendering in solid edge

    I've been reading Solid Edge V19 for Designers by Sham Tickoo. Its definetly a college text book, But it gets a little more depth then the tutorials embedded in SE. I've been using SE for a year and a lot of whats in the book I had to stumble across the hardway
  12. EricatNordic

    Industrial exemption thread765-164422

    Where in any regulations governing corporate product development are companies required to test thier prototypes for safety or suitability for a purpose? This may exist somewhere officially, but I've never seen it before. Or is the obligation to be dilligent in testing supposed to come...
  13. EricatNordic

    Treatment to an existing residential door for improved noise control

    Nice idea Walt. I will try it. Normally sound foam is open cell though right? Is there an open cell pour (squirt actually) foam for sale to the general public? So basically we end up with a very heavy open cell foam core door. The best part about the endeavor is thinking about the look on...
  14. EricatNordic

    Treatment to an existing residential door for improved noise control

    I've never used the white foam mentioned. Is it also a BASF product like the autofroth? You got me curious, although not really for this application. Closed cell urethane foams tend to be dissapointing as sound insullation. They would almost certainly blow the door apart too. I considered...
  15. EricatNordic

    Treatment to an existing residential door for improved noise control

    Are there any treatments that are common to residential construction that can be done to reduce the transmission of sound through old hollow core interior doors? I've sealed airgaps with no effect. Normally I'd go buy a new door. But the finish wood in the house is all from the same period...
  16. EricatNordic

    Surface Finish examples

    The part is 304 plate with tubing welded to it. It's a chase for plumbing to pass through a bulkhead. What I want is no color distortion from the welds, and the weld area to look semi flat, with a grain that is uniform around the part. A finish similar to stainless steel hinges or large...
  17. EricatNordic

    Surface Finish examples

    A fab shop questioned the surface finish callout on a drawing one of our other engineers sent them before vanishing into thin air. No body else is around so I tried to field the estimator questions. Where can I find examples of what different stainless finishes actually look like? What are...
  18. EricatNordic

    How many hours do you require of employees?

    Conscientious and thorough? I don't know. I really just don't want to do it over again on a saturday three weeks later. My motives are entirely lazy. I do have a really hard time bridging the gap between complete analysis, which I don't know how to do, and wild guessing, which I can't...
  19. EricatNordic

    How many hours do you require of employees?

    This whole thread hits close to home, but from the otherside of the fence. How do you all decide or calc ROI of individual staff engineers? I can imagine a theoretical way, but what do you REALLY do? I'm a 1 engineer department in a company with 150+ manufacturing employees building a highly...
  20. EricatNordic

    Composites 101

    When I had just gotten out of school and didn't have much experience, I found this helpful for design http://www.mse.mtu.edu/~drjohn/my4150/compositesdesign/index.html For picking materials and process details, working with our materials reps has been my primary way of learning. -Eric

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