- CATIA TUTORIAL HELICAL GEAR DESIGN HOW TO
- CATIA TUTORIAL HELICAL GEAR DESIGN PLUS
- CATIA TUTORIAL HELICAL GEAR DESIGN FREE
Switch to the Generative Shape Design workshop and click on the f(x) button: Now the tree of your part should look like this: We first need to configure Catia: set the 2 highlighted check boxes: Le second correspond au droulement de la dveloppante.ģ Enable the display of the parameters and formulas Le premier terme correspond une rotation suivant le cercle de base. On a donc un triangle rectangle rsoudre.Įntre le cercle de pied et les flancs des dents, prvoir un petit cong de raccordement pour attnuer l'usure en fatigue.įormule N14: explication de x = rb * cos( t ) + rb * t * sin( t ): La ligne d'action est tangente au cerce de base. Au point de contact, a dfinit l'angle de pression de la ligne d'action. La crmaillre de taillage est tangente au cercle primitif. Y coordinate of the involute tooth profile.Ĭoordonne Y du profil de dent en dveloppante de cercle.ĭraft showing the parameters: a, ra, rb, rf, rp:įormule N11: explication de l'quation rb = d * cos( a ) / 2: X coordinate of the involute tooth profile, generated by the t parameter.Ĭoordonne X du profil de dent en dveloppante de cercle, gnr par le paramtre t.ġ5 yd millimeterrb * ( sin(t * ) - cos(t * ) * t * )
Paramtre de balayage de la courbe en dveloppante.ġ4 xd millimeterrb * ( cos(t * ) + sin(t * ) * t * ) (m * 0.38) vient de la norme.Ġ t 1Sweep parameter of the involute curve.
(m * 0.38) is a normative formula.Ĭong de raccordement la racine d'une dent.
CATIA TUTORIAL HELICAL GEAR DESIGN PLUS
Plus grand en proportion pour un petit module ( 1.25 mm).Ĩ rp millimeterm * Z / 2 Radius of the pitch circle.Rayon du cercle primitif.ĩ ra millimeterrp + ha Radius of the outer circle.Rayon du cercle de tte.ġ0 rf millimeterrp - hf Radius of the root circle.Rayon du cercle de fond.ġ1 rb millimeterrp * cos( a )Radius of the base circle.Rayon du cercle de base.ġ2 rr millimeterm * 0.38 Radius of the root concave corner. Proportionnally greater for a small modulus ( 1.25 mm).Ĭreux d'une dent. Pas de la denture sur une crmaillre gnratrice rectiligne.ĥ e millimeterp / 2Circular tooth thickness, measured on the pitch circle.Įpaisseur d'une dent mesure sur le cercle primitif.Ħ ha millimetermAddendum = height of a tooth above the pitch circle.ħ hf millimeterif m > 1.25 hf = m * 1.25 else hf = m * 1.4ĭedendum = depth of a tooth below the pitch circle. # Parameter Type or unit Formula Description Name in FrenchĢ0degPressure angle: technologic constant (10deg a 20deg)ģ Z integer Number of teeth (5 Z 200).Nombre de dents.Ĥ p millimeterm * Pitch of the teeth on a straight generative rack. All the units are defined in the metric system. The table is given first so that you can use it for further copy/paste operations. Here is a table containing the parameters and formulas used later in this tutorial. The conventional formulas and their names in French come from the pocket catalog Engrenages H.P.C, June 1999 edition. The gear technology is explained in French at. The mathematic description of the involute curve is visually explained I improved it a little for making an exactly symmetric tooth.
Most of my tutorial is based on a nice tutorial on helical gears in English at.
CATIA TUTORIAL HELICAL GEAR DESIGN HOW TO
This tutorial shows how to make a basic gear that you can freely re-use in your assemblies. Since the geometry of a spur gear is controlled by a few parameters, we can design a generic gear controlled by the following parameters: When you are making a realistic design, you may need a template spur gear. The powerful CAD system Catia version 5 release 11 has no tool for designing gears. Written by Gildas Trbaol on June 10, 2005.
CATIA TUTORIAL HELICAL GEAR DESIGN FREE
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