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  1. MechatroPro

    texture on stainless casting parts after lathing

    I've seen this special texture on the surface of stainless steel parts a lot, however I'm not sure what these marks are called or why they appear on the surface after the part is machined. the texture is easily felt under hand. so I'm wondering what they are and why they show up on the surface...
  2. MechatroPro

    help with Geometry Induced Fatigue Analysis

    Hi I have a coupling model that transfers a constant speed and torque. This coupling have 3 type of misalignment (angular, parallel, combined angular and parallel). I have the static structural results of this coupling with each misalignment and constant torque but because of this misalignments...
  3. MechatroPro

    Journal Bearing End seals

    Hello, I'm wondering how Journal bearings are sealed at the two ends to prevent leakage of the pressurized oil inside the bearing at the start of the rotor operation. because at at that momemnt, oil pressure is supplied by external means and should be more more than the rotor weight to lift the...
  4. MechatroPro

    Selecting mechanical seal cooling/flash plan (Seawater Service)

    whats the best way for flushing and cooling the mechanical seal for a seawater service? Attached is the drawing of the pump, its a polymer lined pump for seawater+hcl(2000mg/l) service. Head: 50m...
  5. MechatroPro

    Dark magenta colored Stainless Steel Heat treatment

    I have a couple of parts made of Stainless steel 403, the surface is dark magenta/Red color, I'm wondering what type of heat treatment/hardening process results in such a surface. Any hint is welcome. Here's a picture of the parts: http://s30.postimg.org/jaqu0fgu9/hardening.jpg
  6. MechatroPro

    Pressure Safety Valve required Surface finish/flatness for sealing Surfaces

    what is the required Surface finish and Flatness for seat surfaces of Pressure safety valves in high pressure gas service? I've seen PSVs with metal to metal seat design with perfect mirror finish and flatness, however I'm not sure if there's an established standard for it, either ASME or API...
  7. MechatroPro

    polishing Stellite Hardfacing to mirror finish

    Hello Everyone, We need to polish a narrow ring of satellite hardfacing (5mm width, diameter range of the ring: 2cm to 40cm ) on the base of a cylinder to obtain a mirror finish, but I'm unsure of the process which can give us great wringing flatness and mirror finish. Can this be achieved by...
  8. MechatroPro

    API 673/ Shaft Heat treatment question

    Hello everyone, API 673 states this paragraph about fans for petroleum industries: "Shafts shall be one piece, forged steel, heat-treated after rough machining. Shafts 200 mm (8 in.) in diameter and smaller may be machined from hot rolled steel. All shafts shall be stress relieved after rough...
  9. MechatroPro

    Labyrinth/Housing Fit Question

    Hi everyone, I'm tasked with preparing manufacturing drawings of a Co2 compressor labyrinth seals, I have a question about the required Fit(clearance/interference Fit) of compressor labyrinth seals in housing.As you see in the attached picture, labyrinth seal has an interlocking feature which...
  10. MechatroPro

    Oil flinger/labyrinth combination question

    i have this drawing of a gearbox, which includes a labyrinth type side cover(to seal the shaft) and an oil flinger(i assume to help lubricate the components inside the housing? ) next to it, however i don't understand how this setup works to seal the shaft and lubricate components, and the...
  11. MechatroPro

    L.O in L.O out, S.W in, what are these abbreviations? (Ammonia pump)

    I'm working on a project which involves a high pressure ammonia pump, there are some abbreviations on the drawing that I haven't seen before, what do L.O and SW stand for? here's the Drawing of the pump I'm talking about. Thanks in advance.
  12. MechatroPro

    Welding Alform 700 High-Strength low alloy steel to A516

    Hi everyone, I need help choosing the right SMAW electrode for welding Alform 700M High-Strength low alloy steel to A516, preheat, post heat,current and voltage ratings. any kind of hints is appreciated, as I'm new to welding. Thanks in advance.
  13. MechatroPro

    AC7A-F Aluminum Magnesium Alloy equivalent

    Hi Everyone, AC7A-F alloy is JIS AL-Mg alloy, I'm looking for its 5000 series Equivalent. As far as i know, 5000 series are Aluminum alloyed with magnesium, according to IADS (International Alloy Designation System): http://en.wikipedia.org/wiki/Aluminium_alloy According to references I've...
  14. MechatroPro

    suggestions for a practical machine design book

    i've seen many machine design books, they are helpful for calculation and selection of standard mechanical components used in machine design, but only for the problems stated inside the book. because they are not Design problems, they are Analysis problems. they lack best best practices from a...
  15. MechatroPro

    Planar Style Curve

    i'm using FreeStyle workbench and drawing a freestyle 3d curve on a plane is pretty easy. however if i want endpoints of my 3d curve to snap to edges of neighboring surfaces, it's not easy to keep it planar. they snap to the edge and are free to move along it. any suggestion how to keep 3dcurves...
  16. MechatroPro

    minimized windows problem

    Hello everyone, when i minimize documents inside solidworks window, they appear very small with no captions in lower left corner. i can hardly grab and move or maximize the documents. whats the problem here?
  17. MechatroPro

    running abaqus keywords in CAE

    Hi All, is there a way to run input files command by command in ABAQUS/CAE and make sure that the code i write using ABAQUS keywords actually work as expected? if it's not possible in CAE, then whats the best way?
  18. MechatroPro

    FEA package for machine design?

    i have worked a bit with ProE/Mechanica and found it a good package for machine design work. it works reasonably good in extracting mid-surfaces and creating shells from assembly components.automatically joins them and creates bonded interfaces between components that are touching. however i'm...
  19. MechatroPro

    solidworks high CPU usage

    hello everyone. whenever i move my mouse over the graphics area, even in an emty part, my CPU usage jumps to 50% which is the maximum for a multicore processor. is there a problem here or it's solidworks' normal behavior? (SW09/10,xp,7)
  20. MechatroPro

    2d production drawings of machine components

    hello everyone, i have a question about solidworks drawing capability. can solidworks make 2d production drawings of machine components like gear mates and sprockets? (as we all now, these components have special representations in drawings, which is different from their real geometrical...

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