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  • PierArg's Avatar
    Today, 07:24
    You're welcome Kaka!!! This is the spirit of the forum;)
    23 replies | 614 view(s)
  • Kaka_89's Avatar
    Today, 05:19
    Hi Goldenwheatfield, Really your question is not complicated. Listen, all the thinks which consists of to designed process come from the need. In Poland we say "Potrzeba matką wynalazku" what mean " The need for the mother of invention". First, you must know what you really want to do. Then you must express construction assumptions fo receiving: -how the thing work description; -situation data; -quantitative data; If you had this 3 points, then you must make a work concept, with law min. 3 another ...
    1 replies | 125 view(s)
  • Kaka_89's Avatar
    Yesterday, 20:48
    Hi Naga, If I understand, you want designed a centrifugal rotor, ok. By Frictional Torque I understand you want to calculate the sum of the resistance your medium on rotor with 16000rpm. That is right? The moment of Inertia it is simple to calculate for not complicated shape, but if you had a complex model there is a another method - calculation the moment of inertia with for example SolidWorks. I am waiting for your answer. KKA
    2 replies | 321 view(s)
  • Kaka_89's Avatar
    Yesterday, 20:34
    Thanks bro, this is amazing how easy is theory in american technical books, and moreover there is a plenty simply understanding examples. I must load up in this text and then, i thought that i build the fatigue diagram for GGG60 Ductile Cast Iron self. Thanks once again. I thing this topic can be closed :)
    23 replies | 614 view(s)
  • Lochnagar's Avatar
    Yesterday, 14:17
    Hi Naga, I have no specific knowledge about medical centrifuges - but if you have a look at the MS Power Point presentation below - you will see you need more information about the substance you are trying to separate in the centrifuge - than you have provided in your original posting. So I think it is a bit more involved than you had perhaps first thought - but I hope this helps you with your problem. https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCEQFjAA&url=http%3A%2F%2Fwww.axis-shield-density-gradient-media.com%2Ftraining-1new.ppt&ei=LtSSVPD9A42U7QbXwoCIDw&usg=AFQjCNF4XhDeO9nh_nA4aqFqG24cYtZgyA&sig2=s_ebOx4Ocu6RtkT-m3TMIQ
    2 replies | 321 view(s)
  • vnmanpower's Avatar
    Yesterday, 03:31
    Sometimes, on a journey to become a true leader, let’s take a break and ask yourself whether you are on track or not. As an employer, what is the most important element which helps you minimize the difficulties, obstacles and uncertainties in the process of development? We – Vietnam recruitment agency – on behalf of all recruitment companies have found the answer. Employees like the fulcrum of the lever, therefore the selection of staffs play an important role for every business. With more than 10 years’ experience in recruitment services, Vietnam recruitment agency has provided total thousands of laborers with different job categories: construction jobs, offshore jobs, engineer jobs, etc. We always receive the trust and compliment as the leading head hunter from our customers from many countries including Saudi Arabia, Qatar, UAE, Kuwait, Taiwan, Japan, Malaysia…because we have a strict recruitment process and workers from Vietnam recruitment agency are well – known for...
    0 replies | 102 view(s)
  • PierArg's Avatar
    17th Dec '14, 12:51
    Authors: Shigley, Budynas and Nisbett Title: Mechanical Engineering Design Publisher: Mc Graw Hill I don't know why but in internet it's easy to find the pdf...is it legal? Here a link to the book (I kindly ask to the admin to remove the link if it could infringe the law and the copyright):
    23 replies | 614 view(s)
  • Kaka_89's Avatar
    17th Dec '14, 12:23
    Did you may post link to this book? Or if no please write a full title of this book. I will be grateful to you. KKA
    23 replies | 614 view(s)
  • PierArg's Avatar
    17th Dec '14, 09:50
    Hello Kaka, as I wrote some posts ago, Shigley and Juvinall in their books discuss about the Wohler curve construction. You can easily refer to one of them.
    23 replies | 614 view(s)
  • Kaka_89's Avatar
    17th Dec '14, 09:17
    Thanks everybody for help. PierArg your fatigue curve is ok, but i must recalculate my problem couple of times then i have a guarante that it is good. T-Harv, i saw that webpage a month ago, but it is not graphs that the interested me. I found a book called "Analitycal Strenght Assessment" - it is FKM (Deutchland) publishing house - there is a method to make a Wohler curve for any materials. I only must study this prolem. Anyway, thanks everybody for your invaluable help. Pozdrawiam :) KKA
    23 replies | 614 view(s)
  • kylerob70's Avatar
    16th Dec '14, 21:49
    Hey all! I am from the Bluegrass state of Kentucky, United States. Nice to see all the variety of cultures here.
    333 replies | 43083 view(s)
  • kylerob70's Avatar
    16th Dec '14, 21:45
    Hi All, first post here, I've been "spying" on forums and taking it in then decided I may as well get involved. So, Hello from the western part of the Bluegrass state!
    80 replies | 15630 view(s)
  • AFCPPF's Avatar
    16th Dec '14, 10:03
    Hello, First and foremost, yes you can see in a diagram presented by the American Welding Society, in the Welding Handbook that you can weld nickel with nickel or nickel with aluminum directly. From my experience welding dissimilar metals you should place the toughest metal in the sonotrode side; otherwise the energy delivered by it to the weld will be absorbed by the softer material and this one will become viscous and be extruded out of the weld due to the applied pressure. This means that you must apply your Al component on the anvil side. You have a very good MSc thesis, by Matthew Carlton Bloss, in the Ohio State University, 2008. He specifically worked with Nickel in USMW (among other materials). You can get it on the web for free. The energy requirement will mainly depend on two factors; thickness and material hardness. The Welding Handbook also has a diagram for the Energy to apply in a weld.
    1 replies | 214 view(s)
  • T-Harv's Avatar
    15th Dec '14, 22:37
    I've found a site that might be of some help to you. It is the Ductile Iron Societies web page for engineers. Here is the link http://ductile.org/didata/Section3/3part1.htm#top
    23 replies | 614 view(s)
  • Michael Ross's Avatar
    15th Dec '14, 22:05
    You might try adding a UHMW polyethylene washer to the stack. These do not require lubricant. You can adjust the feel by how hard you clamp the stack. High temperatures would present difficulty by causing the washer to lose thickness (compression set). But it the temperatures are not so high it might be a good solution.
    2 replies | 774 view(s)
  • K Shores's Avatar
    15th Dec '14, 21:37
    Motor City USA! It's 2 weeks before Christmas shut down and I don't want to start another project until 2015.
    333 replies | 43083 view(s)
  • K Shores's Avatar
    15th Dec '14, 21:34
    Hello to all my fellow ME's around the globe!
    80 replies | 15630 view(s)
  • K Shores's Avatar
    15th Dec '14, 21:33
    Notification from LinkedIn.
    105 replies | 18374 view(s)
  • miltonbr's Avatar
    15th Dec '14, 15:09
    Dear Paul: I wish you all the best of luck. Honestly.
    329 replies | 48715 view(s)
  • naga1501's Avatar
    15th Dec '14, 11:08
    Dear All, Good Day! I have a Rotor which is used for medical centrifuge application ( separation max of 2ml. x 12 slots) need to find out the Frictional Torque of the Rotor ( rotor made up of Alu 6061 shape conical). weight of the Rotor is 0.370 Kg. need to find out Mass moment of Inertia of the Rotor. Rotor Maximum RPM is 16000. What are the other parameters needs to be considered when we design Rotor. Any one could help me out on this. Thanks in advance,
    2 replies | 321 view(s)
  • Goldenwheatfield's Avatar
    14th Dec '14, 21:53
    From where I study, we have B.eng mechanical engineering which stands for bachelor of engineering in mechanical engineering. I wonder if there are any difference between BSME and B.Eng mechanical engineering... thank you!
    7 replies | 296 view(s)
  • Goldenwheatfield's Avatar
    14th Dec '14, 21:19
    Is BSME stand for bachelor of science in mechanical engineering?
    7 replies | 296 view(s)
  • mira's Avatar
    14th Dec '14, 14:54
    Thank you Peter. I'll try it.
    4 replies | 523 view(s)
  • PWASS's Avatar
    14th Dec '14, 10:09
    Mira You only have to release the shaft/arm that is no longer in alignment. See here: http://www.techdrives.co.uk/Multimedia/Mechanical%20locking%20bushes/tollok-locking-assemblies.pdf for instructions.
    4 replies | 523 view(s)
  • Goldenwheatfield's Avatar
    14th Dec '14, 01:18
    Thank you so much Lochnagar and thebestjake!! Thank you!
    7 replies | 296 view(s)
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