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 TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. GuyFromDenver

    Forming a perforated sheet

    I haven;t done any sheet metal design in NX yet, but in SolidWorks I would draw a perforated sheet then bend it. It would then represent the part as it would be if you did it for real
  2. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    Mine are a tad bigger then HO scale. The toy I am playing with now is 290,000 lb, 70 feet long, 16 feet high and 4,000 hp. All that said, I am 6', 200#. I consider myself a good average size. I still have to squeeze through a few spots on the inside of these locos as I work mostly on commuter...
  3. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    i SUGGESTED TRYING OUT AN EVALUATION COPY, AND i QUOTE, "tHE SHORT ANSWER IS NO." lOVELY!
  4. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    I'm certain it would help out, and I work for a pretty big company, so I might be able to talk them into buying a copy when I show them what it can do. It's good to know how much body you can cram into a passageway in the back of a locomotive before it's built.
  5. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    http://graphicriver.net/item/artists-mannequin/65130
  6. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    I've seen that thread and downloaded their guy, but he was a parasolid, so I couldn't pose it in a squatting configuration. The SolidWorks man I had before was an assembly, so I was able to move it around by changing the mating constraints, and I could change it's size by scaling the individual...
  7. GuyFromDenver

    NX 7.5 Human model. I Ain't Got Jack!

    I would like a human model that I can very in height, weight and position. I am using NX 7.5, but I don't have a license for Jack. Does anybody know of a downloadable version that I can get for free? (Free being my favorite four letter F-word) (Food is a close second).I had one that a friend...
  8. GuyFromDenver

    UV Blocking clear material or coatings

    Funny! I just got off the phone when I received your message Harold! they can all do it, but the color of the light is so warm that it appears to look like a high pressure sodium lamp, and that is what i am retying to replace. They have low color rendering and are energy hogs. LEDs have a much...
  9. GuyFromDenver

    UV Blocking clear material or coatings

    Thanks for the help. My biggest concern is that the light will not be white anymore after it passes through the filter. Is anybody out there able to do a notch band reject filter that will squelch out only the wavelengths between say 450 and 490 nm?
  10. GuyFromDenver

    UV Blocking clear material or coatings

    I am working on a medical application where I need to block wavelengths of light from 500 nm and lower. The photoinitiators in medical composites typically cure at 470 nm, so I can't have any of the blue and UV light. Most of the methacrylates (Lexan and the like) don't cut off until about 400...
  11. GuyFromDenver

    Dry or Wet fasteners (re:thread404-173061)

    You best bet is to clean the fasteners then lube them with something that is compatible with your physical environment and then lube them with something that is consistent. Most moly-D's are predictable but won't work in strong oxidizing environments. In that case use Inlox (Google them They are...
  12. GuyFromDenver

    Manual heat sink design analysis

    Aavid.com is a pretty good place to start. Find a heatsink of theirs from their selector guides online then design yours around them. i admit it, I've done it before! I needed a rather large heatsink that they had in their catalog, but after getting their pricing I learned that for the Quantity...
  13. GuyFromDenver

    Condenser Heat Load

    If the exhaust from a turbine is not superheated it will cavitate in the blades and beat the snot out of them. it is for that reason that most commercial power generating stations back pressure the turbine exhaust so that it is not in the quallity region on the way out. You take an efficiency...
  14. GuyFromDenver

    How to measure heat from electronics

    A thermal test rig will not tell you directly how much heat it takes to maintain a set point, but you could back a good swag out empirically given the data you got from the tank. What you could do however is heat things up to steady state then tweak your input power until you reach the point you...
  15. GuyFromDenver

    Expansion factor

    I don;t think you have much to worry about because air is compressible. As with and pressure vessel you should, by code, have a relief valve on it just in case. It would be safest to vent it to ambient and thereby solve the problem. If you cannot vent it then calculate the pressure in the vessel...
  16. GuyFromDenver

    How to measure heat from electronics

    One other point: yes, while the device cannot dissipate more power then it put into it a la the Second Law of Thermodynamics, neither can any device 100% efficient, a la Law #3. This means there are losses, and much of that is in the form of heat. Another consideration is that if the device is...
  17. GuyFromDenver

    Question regarding heat transfer through a solid bar

    One thing you also must figure in it your thermal balance: heat in plus generated equals heat stored plus heat out. the input heat is from the furnace. There should be little if and heat generated unles there is some reaction going on. The heat stored is calculated from lumped capacitance and...
  18. GuyFromDenver

    How to measure heat from electronics

    While the suggestions offered in this thread are all good ways of measuring temperature, they are not means of measuring heat, if it is in fact heat that you are looking for. While doing a research project for NIST when I was in school we rigged a device to measure the real area of surface...
  19. GuyFromDenver

    Project Notice Boards

    I'd write, "Never forget! The best way to do a project is to job it out!"
  20. GuyFromDenver

    How to Determine max shear force on a pin

    Most of what I've read in this thread is sound, but there is something else that you must consider: bending. If you are in double shear then it isn't much of an issue, but in single shear it is. Draw a free body diagram and you will see that there is a bending moment induced on the pin for two...

Part and Inventory Search

Back
Top