PartDesign InvoluteGear/ru

Описание
Инструмент позволяет создавать двумерный профиль внутренней шестерёнчатой передачи. Этот профиль полностью параметрический, и может быть оформлен с помощью выдавливания.

For more detailed information see Wikipedia's entries for: Gear and Involute Gear



Create the profile

 * 1) Optionally activate the correct body.
 * 2) Go to the menu.
 * 3) Set the Involute parameters.
 * 4) Click.
 * 5) If there was no active body: drag and drop the gear into a body for the application of further features like padding.

Create a spur gear

 * 1) Select the gear profile in the tree.
 * 2) Press the  button.
 * 3) Set the pad's  to the desired face width of the gear.
 * 4) Click

Create a helical gear

 * 1) Select the gear profile in the tree.
 * 2) Press the  button.
 * 3) Choose as Axis the normal of the gear profile, that is  . (In earlier versions the  can be used as long as the profile's plane has not been altered.)
 * 4) Choose a  mode.
 * 5) Set the  to the desired face width of the gear.
 * 6) To set the desired helical angle an Expressions for the  is required.
 * 7) Click the blue [[Image:Bound-expression.svg|16px]] icon at the right of the input field.
 * 8) Enter the following formula:, where  is an example for the desired helical angle (also known as beta-value) and  is the   of the profile.
 * 9) Click  to close the formula editor.
 * 10) Click  to close the task panel.

Hint: To make the helical angle an accessible parameter, use a dynamic property:
 * 1) Select the profile.
 * 2) In the Property editor activate the  option in the context menu.
 * 3) Again in the context menu, select . Note: this entry is only available when  is active.
 * 4) In the  dialog:
 * 5) Choose  as Type.
 * 6) Set  as Group.
 * 7) Set  as Name (without a space).
 * 8) Click
 * 9) Now a new property  (space added automatically), with an initial value of, becomes available.
 * 10) Assign the desired helical angle to the new property.
 * 11) In the formula of the  property of the AdditiveHelix, you can now reference  instead of the hard coded value of e.g. ; again assuming  is the  of the profile.

Properties

 * : True or false


 * : True or false


 * : Pitch diameter divided by the number of teeth.


 * : Sets the number of teeth.


 * : Acute angle between the line of action and a normal to the line connecting the gear centers. Default is 20 degrees. (More info)

Tutorials
How to make gears in FreeCAD

Related

 * FCGear Workbench