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worm-gear: add parameter clearence, head

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looooo
2020-06-23 06:38:02 +02:00
parent 0a19329a2d
commit ca3b8d3a5e
1 changed files with 17 additions and 6 deletions
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23
freecad/gears/features.py
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@@ -204,9 +204,9 @@ class InvoluteGearRack(object):
obj.addProperty(
"App::PropertyBool", "double_helix", "gear_parameter", "double helix")
obj.addProperty(
"App::PropertyFloat", "head", "gear_parameter", "head_value * modul_value = additional length of head")
"App::PropertyFloat", "head", "gear_parameter", "head * module = additional length of head")
obj.addProperty(
"App::PropertyFloat", "clearence", "gear_parameter", "head_value * modul_value = additional length of foot")
"App::PropertyFloat", "clearence", "gear_parameter", "clearence * module = additional length of foot")
obj.addProperty(
"App::PropertyBool", "properties_from_tool", "gear_parameter", "if beta is given and properties_from_tool is enabled, \
gear parameters are internally recomputed for the rotated gear")
@@ -612,11 +612,19 @@ class WormGear(object):
"App::PropertyAngle", "beta", "gear_parameter", "beta ", 1)
obj.addProperty(
"App::PropertyAngle", "pressure_angle", "involute_parameter", "pressure angle")
obj.addProperty(
"App::PropertyFloat", "head", "gear_parameter", "head * module = additional length of head")
obj.addProperty(
"App::PropertyFloat", "clearence", "gear_parameter", "clearence * module = additional length of foot")
obj.teeth = 3
obj.module = '1. mm'
obj.pressure_angle = '20. deg'
obj.height = '5. mm'
obj.diameter = '5. mm'
obj.clearence = 0.25
obj.head = 0
self.obj = obj
obj.Proxy = self
@@ -625,16 +633,19 @@ class WormGear(object):
d = fp.diameter.Value
t = fp.teeth
h = fp.height
clearence = fp.clearence
head = fp.head
alpha = fp.pressure_angle.Value
beta = np.arctan(m * t / d)
fp.beta = np.rad2deg(beta)
beta = np.pi / 2 - beta
r_1 = (d - 2 * m) / 2
r_2 = (d + 2 * m) / 2
z_a = 2 * m * np.tan(np.deg2rad(alpha))
r_1 = (d - (2 + clearence) * m) / 2
r_2 = (d + (2 + head) * m) / 2
z_a = (2 + head + clearence) * m * np.tan(np.deg2rad(alpha))
z_4 = m * np.pi
z_2 = z_4 / 2
z_2 = z_4 / 2 + head * m * np.tan(np.deg2rad(alpha))
z_1 = z_2 - z_a
z_3 = z_4 - z_a