epicyclic curve
in [SolidWorks]
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From: TOP on 24 May 2005 18:56 That is why they call Pro/E a parametric modeler. The equations here are parameter driven. SW cannot generate a parametric curve like the little macro does. In fact the macro is pretty simple to modify to create any kind of parametric curve. Just change the equations for x and y. This curve is not the curve for gear tooth faces. That is called an involute and there is a fairly simple construction to make it.
From: Giorgis on 25 May 2005 02:54 Wow thanks guys, I will define the problem a little more now and see what you think. I have a wheel and it has three protrusions on it. This wheel rolls on a flat surface As it rolls, it fits thru a hole smoothly. I need the profile of this hole. Now I came up with the easy way out. Make the protrusion the same as a tooth on a pinion. The matching shape is but a flat tooth as you would find on a rack. This is an intresting topic, so it would be good if it is explored further. Kind thanks for all help so far, I will try some of the ideas suggested. Giorgis
From: Giorgis on 25 May 2005 03:20 By the way, Solidworks should have a method of drawing epicyclic curves. You can generate all manner of gears by editing the parameters. I guess I should explored the formulas used to generate the profiles. What I have done instead is put a pinion and a matching rack. Then pinch the profiles by using "convert entities" End up with only one tooth. It will work exactly ... priceless ?!?! I know I took the easy way out, but that is what engineering is all about G
From: Giorgis on 25 May 2005 03:30 DAMN ... I am wrong, the thooth profile on the gears drawn by SolidWorks are actualy arcs on a circle. I should have guessed that they are pictorial. They look so close though %$#@^&#$@. Anyway, I should be able to find the exact profile onece I have figured out the correct gear to put in. Giorgis
From: TOP on 25 May 2005 06:51
How is this an epicyclic curve? |