آموزش طراحی چرخ دنده در کتیا
آموزش طراحی چرخ دنده در کتیا
پیوند ها
    نويسنده :


    DESIGNING GEAR IN CATIA V5
    Author’s Note:
    This is step by step guide how to create gear using CATIA.
    I'm not CATIA expert. Someone might find that CATIA doesn't
    have much with TCP/IP and FreeBSD. I coulnd't find
    much about gear design using GOOGLE or YAHOO. Since I enjoy
    learing and practicing what I learn, I also enjoy sharing that
    with others (often seen on overnet/edonkey: please share :)
    don't be selfish. Here is step by step guide how to make spur gear
    using CATIA. Note that this was inspired by document I have
    found at website www.piovision.com (credits go to the unknown
    designer).
    But let's start. This document assumes that you have basic
    CATIA experience. Also, this document assumes that you know basic spur
    gear geometry. Here is excellent document from www.bostongear.com
    in case you are not familiar. Some basic notations:
    rb - base cylinder radius
    r - pitch circle radius
    rk - outside circle radius
    rf - root radius
    a - pressure angle (20deg)
    m - modulo (in our example 20) m=p/3.14159 where p is circular pitch
    2r=m*z
    z - number of teeth (in our example 20)
    When you start CATIA, go to TOOLS->OPTIONS->Infrastructure->
    Part Infrastructure and in Display select Paramteres and Relations.
    Then in Options->General in Parameters and Measures select With value
    and With formula in Parameters Tree View.
    Now it is time to go to Generative Shape Design:
    You will see something like:
    Bring Knowledge toolbar out:
    Then by clicking on arrow pointed down near table icon:
    Fog and f(x) are two most important things you will use for Gear
    Design:
    Now it is time to enter some basic parameters that define gear
    This is done by clicking at f(x) icon:
    And then when you see dialog box: Formulas: Part1
    fist select Parameter type (real, length or angle) click new
    Parameter of type and then edit value. You can do this until
    all parameters are entered.
    When you enter parameters it is time to enter some formulas.
    For, r, rb, rk and rf we enter formulas by naming them and by
    clicking Add Formula. Formula editor will appear:
    After typing all formulas and expanding specification tree you
    will see something like this:
    It is time to add laws that will define our involute. Click on fog
    icon, name law x add parameters, t and x select their
    types and add law:
    Same should be done for y. This law will help us to create
    points that define spline for our involute. Involute is line
    that is trajectory of point belonging to line that is always
    tangent to base gear cylinder. It is used for tooth profile.
    If gears had profiles formed by straight lines they wouldn't
    work.
    After expanding specification tree you should be able to
    see something like this:
    Now it is time to start creating our points for involute spline.
    Click on point icon, select xy plane for support and when asked
    to enter H and V cordinates right button click should bring menu
    where you should chose edit formula:
    You will be prompted by edit formula dialog. Type in: Relationsx
    .Evaluate(0)
    You should do same for V except you should use Relationsy
    .Evaluate(0). You will get starting point for involute:
    After repeating this step for .Evaluate(0.1)-.Evaluate(0.5) you will
    get this:
    Click on spline icon and chose all 6 points:
    Your involute is created! This is how it looks in sketcher:
    From this point everything is more or less simple.
    Create base cirle by clicking on cirle icon.
    Right click on radius and chose rb from formula editor:
    Now it is time to extrapolate our involute. For length also right click
    and chose formula (rb-rf)*1.5
    You can use View-> zoom and pan to see what actually you are doing.
    Create plane. Use formula: inv(360/z)/4. You will get -4.5deg angle
    offset from ZY plane.
    After this create rf circle and from insert menu use corner to create
    corner. Corner dialog will appear:
    This is what you should get:
    Now use trim and result should be:
    It is time for symmetry. Tooth starts to get shape:
    Create rk circle and use trims to get tooth shape:
    Circular pattern:
    First select tooth (trim.3) and then for reference element select Zaxis.
    Gear is almost done now it is time for joining all teeth:
    Turn off check manifold and check consistency:
    Apply one more trim and here is our gear in normal plane:
     


    برچسب ها: طراحي چرخ دنده هاي ساده و مخروطي در كتيا - آموزش نرم افزاركتيا براي ... , طراحی اصولی چرخدنده در کتیا - پرشین کتیا , مرجع آموزش تخصصی کتیا در کاشان , CATIA.IR :: تمرينات آموزشی کتیا CATIA , چرخدنده | مهندسی دانلود , مهندسی دانلود/عمران/ معماری/مکانیک/mohandesidl , Eng-Zamani.ir , پروژه اصول روشهای تولید چرخدنده - مکانیک (ساخت و تولید) ,


    کد :2241
    منوی اصلی
      آرشیو مطالب
       
       
       
      فروش فایل
      websky