* {{PropertyData|Label}}: User name of the object in the [[Tree_view|Tree view]].
* {{PropertyData|extend1}}: Extends the wall on the left side.
* {{PropertyData|extend2}}: Extends the wall on the right side.
* {{PropertyData|gap1}}: Gap from the left side.
* {{PropertyData|gap2}}: Gap from the right side.
* {{PropertyData|invert}}: Invert bend direction.
* {{PropertyData|length}}: Length of the wall.
* {{PropertyData|miterangle1}}: Bend miter angle on the left side.
* {{PropertyData|miterangle2}}: Bend miter angle on the right side.
* {{PropertyData|radius}}: Bend radius.
* {{PropertyData|relief Type}}: Rectangle or Round. Enabled only when a gap value is set.
* {{PropertyData|reliefd}}: Relief depth. Enabled only when a gap value is set.
* {{PropertyData|reliefw}}: Relief width. Enabled only when a gap value is set.
* {{PropertyData|kfactor}}: K factor (also known as neutral factor) for the bend. Used to calculate bend allowance when unfolding.
* {{PropertyData|unfold}}: False (default) or True. If true, unfolds the bend.
{{Properties_Title|computed}}
* {{PropertyData|dw}}: Pitch diameter (not changeable, is calculated automatically).
{{Properties_Title|gear_parameter}}
* {{PropertyData|beta}}: With the helix angle β a helical gear is created (positive value → rotation direction right, negative value → rotation direction left).
* {{PropertyData|clearance}}: Default is 0,25 (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|double_gear}}: {{Emphasis|True}} creates a double helix gear (see also the information in {{Emphasis|Notes}})
* {{PropertyData|head}}: Default is 0,00. This value is used to change the tooth height.
* {{PropertyData|height}}: Value of the gear width.
* {{PropertyData|module}}: Module is the ratio of the reference diameter of the gear divided by the number of teeth (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|numpoints}}: Default is 6, change of the involute profile. Changing the value can lead to unexpected results.
* {{PropertyData|properties_from_tool}}: If helix angle β is given and {{Emphasis|properties_from-tool}} is enabled, gear parameters are internally recomputed for the rotated gear.
* {{PropertyData|shift}}: Default is 0,00, generates a positive and negative profile shift (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|simple}}: {{Emphasis|True}} generates a simplified display (without teeth and only a cylinder in pitch diameter).
* {{PropertyData|teeth}}: Number of teeth (see also the information in {{Emphasis|Notes}})
* {{PropertyData|undercut}}: {{Emphasis|True}} changes the profil of the tooth root (see also the information in {{Emphasis|Notes}}).
{{Properties_Title|involute_parameter}}
* {{PropertyData|pressure_parameter}}: Default is 20 (see also the information in {{Emphasis|Notes}}).
{{Properties_Title|tolerance}}
* {{PropertyData|backslash}}: Default is 0,00. Backlash, also called lash or play, is the distance between the teeths at a gear pair.
* {{PropertyData|reversed_backslash}}: {{Emphasis|True}} backlash decrease or {{Emphasis|False}} backlash increase (see also the information in {{Emphasis|Notes}}).
=== View ===
=== View ===
Revision as of 13:09, 2 June 2020
This documentation is not finished. Please help and contribute documentation.
Start with a base plate or sheet, select one or more edges to receive a bend.
Click on the Bend tool to add a bend.
Properties
Data
Base
DataLabel: User name of the object in the Tree view.
View
The parameter descriptions of the View tab will be found in Property editor, further below at Example of the properties of a PartDesign object.
Notes
clearance: At a gear pair, clearance is the distance between the tooth tip of the first gear and the tooth root of the second gear.
double_gear: To use the double helical gearing the helix angle β (beta) for the helical gearing must first be entered.
module: Using ISO (International Organization for Standardization) guidelines, Module size is designated as the unit representing gear tooth-sizes. Module (m): m = 1 (p = 3.1416), m = 2 (p = 6.2832), m = 4 (p = 12.566). If you multiply Module by Pi, you can obtain Pitch (p). Pitch is the distance between corresponding points on adjacent teeth.
shift: Profile shift is not merely used to prevent undercut. It can be used to adjust center distance between two gears. If a positive correction is applied, such as to prevent undercut in a pinion, the tooth thickness at top is thinner.
teeth: If the number of teeth is changed, the pitch diameter also changes (dw).
undercut: Undercut is used when the number of teeth of a gear is too small. Otherwise the mating gear will cut into the tooth root. The undercut not only weakens the tooth with a wasp-like waist, but also removes some of the useful involute adjacent to the base circle.
pressure_parameter: 20° is a standard value here. The pressure angle is defined as the angle between the line-of-action (common tangent to the base circles) and a perpendicular to the line-of-centers. Thus, for standard gears, 14.5° pressure angle gears have base circles much nearer to the roots of teeth than 20° gears. It is for this reason that 14.5° gears encounter greater undercutting problems than 20° gears. Important. the pressure angle changes with a profile shift. Only change the parameter, if sufficient knowledge of the gear geometry is available.
reversed_backslash: If there are several gears, pay attention to which gear the parameter is set for.
Limitations
Limitation are not known yet.
Scripting
Use the power of python to automate your gear modeling:
creates a bend on the selected edge.
SheetMetal Workbench.
