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Recent content by cooperjer

  1. cooperjer

    how to used right the refinement point tool in algor

    You may need to create four split surfaces with the intersection of the four surfaces at the location you want to connect the beam. A split surface will make the mesher create nodes along the surface edge. Cooperjer Mechanical Engineer
  2. cooperjer

    Locking an adjustment screw

    The Loctite adhesives have a lot of versatility. You may want to contact your local Loctite sales rep to get their recommendation. Regarding the bolt design, I would recommend referencing Fundamentals of Machine Component Design by Juvinal and Marshek. I find this book invaluable for bolted...
  3. cooperjer

    Which to choose? Cosmos, Nastran, Catia, Ansys Abaqus...

    Hello Arranot, There are several factors to consider when purchasing an FEA package. The factors I used were as follows: Price, Ease of use with the UI, Customer support times available, Online tutorials or support, and speed of processing a complex geometry model with simple supports and...
  4. cooperjer

    Cantilevered bolted connection

    Hello EspElement, In addition to the welding book by Blodgett please consider Fundamentals of Machine Component Design by Juvinall and Marshek. There is an entire chapter dedicated to design with threaded fasteners, with an example that matches the information given in the DANotes you linked...
  5. cooperjer

    End Cones for torsion springs

    I'm currently working on finding a stronger and tougher end cone for torsion springs. Presently my design is using the overhead door standard of a cast aluminum part. These are about the best parts for the cost, but it seems they have a tendency to crack in our application. Is there a...
  6. cooperjer

    Torsion spring winding tools?

    I’m on a quest to safely wind a torsion spring. My search has turned up something called the EZ-Set torsion spring system; however, I would like other possible ideas. I believe the EZ-Set torsion spring system will not work with the spring I’m looking to torque. The spring that needs torque...
  7. cooperjer

    Software available to determine bolt/nut shear strength

    I would be hesitant using a bolt design software for plastic bolts. I’m sure they would work great for steel bolts, and possibly for SST bolts, but plastic is a whole different creature. Some things that the plastic may affect are fatigue, creep, and stress concentrations in threads. As far...
  8. cooperjer

    Estimating wear of hard anodized aluminum

    If you haven’t already looked at rolling contact stress I would start there. If you have a copy of Fundamentals of Machine Component Design by Juvinall and Marshek check out chapter 9.13, or net search for “rolling contact stress.” If you do not have a copy of Fundamentals of Machine...
  9. cooperjer

    Cv conversion to other units

    I was looking in Marks' Handbook for MEs and I did not find this conversion, although I did not look very hard. If you happen to know what page it would be I'd be very gratefull. Second question, what is "d" when looking at a valve. Let's take for example a valve with the following...
  10. cooperjer

    Bent plate after welding. How to prevent?

    We have decided to change the design to bolt the L-bracket to the flat plate. Thank you all for the suggestions. I have considered all of them. Cooperjer Mechanical Engineer
  11. cooperjer

    Bent plate after welding. How to prevent?

    Thank you all for the responses. I’ve presented by manager with 5 possible design solutions: 1) pre-weld bending, 2) post weld bending, 3) pre-weld heating, 4) post weld heating / straightening, and 5) added gussets to prevent deflection. Now it’s time to weigh the merits and flaws of each...
  12. cooperjer

    Bent plate after welding. How to prevent?

    Forgot the steel type. It's 304 Stainless. Cooperjer Mechanical Engineer
  13. cooperjer

    Bent plate after welding. How to prevent?

    "How flat do you want the plate after welding?" This is a good question. On two corners of the plate a shaft protrudes out opposite of the 3x3 tubes about 6-inches. This shaft has a plastic roller on it. Any deflection in the plate due to welding or pre-welding manufacturing, as the plate has...
  14. cooperjer

    Bent plate after welding. How to prevent?

    I am faced with a design problem that involves welding bending a flat plate. The flat plate is 23.5x23.5x.38 –inches. I’m welding a two 3.00x3.00-inch tubes about 9 inches apart along the center line of the plate. In addition I’m welding 2 L brackets near the center of the plate about 3...
  15. cooperjer

    Need more magnatism from stainless steel

    Thank you for the information. I should pick up a copy of "Physical Metallurgy Handbook." With this information it appears as though I have the best SST for the job. I think it's time to find a new sensor for the job. Sreid, the 1mm gap is not a physical limit, however, the error involved in...

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