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added some possibilities to influence the involute-gear profile

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looooo
2017-02-03 13:58:57 +01:00
parent db2c46f331
commit d739065008
2 changed files with 18 additions and 8 deletions
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17
gearfunc/_Classes.py
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@@ -95,8 +95,12 @@ class involute_gear():
obj.addProperty(
"App::PropertyAngle", "beta", "gear_parameter", "beta ")
obj.addProperty(
"App::PropertyLength", "backlash", "gear_parameter", "backlash in mm")
obj.addProperty("App::PropertyPythonObject", "gear", "test", "test")
"App::PropertyLength", "backlash", "tolerance", "backlash")
obj.addProperty(
"App::PropertyBool", "reversed_backlash", "tolerance", "backlash direction")
obj.addProperty(
"App::PropertyFloat", "head", "gear_parameter", "head_value * modul_value = additional length of head")
obj.addProperty("App::PropertyPythonObject", "gear", "gear_parameter", "test")
obj.gear = self.involute_tooth
obj.simple = False
obj.undercut = False
@@ -107,8 +111,10 @@ class involute_gear():
obj.beta = '0. deg'
obj.height = '5. mm'
obj.clearance = 0.25
obj.head = 0.
obj.numpoints = 6
obj.backlash = '0.00 mm'
obj.reversed_backlash = False
self.obj = obj
obj.Proxy = self
@@ -120,7 +126,8 @@ class involute_gear():
fp.gear.pressure_angle = fp.pressure_angle.Value * pi / 180.
fp.gear.beta = fp.beta.Value * pi / 180
fp.gear.clearance = fp.clearance
fp.gear.backlash = fp.backlash.Value
fp.gear.backlash = fp.backlash.Value * (-fp.reversed_backlash + 0.5) * 2.
fp.gear.head = fp.head
fp.gear._update()
pts = fp.gear.points(num=fp.numpoints)
rotated_pts = pts
@@ -223,7 +230,7 @@ class cycloide_gear():
obj.addProperty("App::PropertyAngle", "beta", "gear_parameter", "beta")
obj.addProperty(
"App::PropertyLength", "backlash", "gear_parameter", "backlash in mm")
obj.addProperty("App::PropertyPythonObject", "gear", "test", "test")
obj.addProperty("App::PropertyPythonObject", "gear", "gear_parameter", "test")
obj.gear = self.cycloide_tooth
obj.teeth = 15
obj.module = '1. mm'
@@ -298,7 +305,7 @@ class bevel_gear():
"gear_parameter", "number of points for spline")
obj.addProperty(
"App::PropertyLength", "backlash", "gear_parameter", "backlash in mm")
obj.addProperty("App::PropertyPythonObject", "gear", "test", "test")
obj.addProperty("App::PropertyPythonObject", "gear", "gear_paramenter", "test")
obj.gear = self.bevel_tooth
obj.m = '1. mm'
obj.teeth = 15

9
gearfunc/_involute_tooth.py
View File

@@ -25,7 +25,8 @@ from ._functions import nearestpts, rotation, reflection, trimfunc, norm, transl
import numpy as np
class involute_tooth():
def __init__(self, m=5, z=15, pressure_angle=20 * pi / 180., clearance=0.12, shift=0.5, beta=0., undercut=False, backlash=0.00):
def __init__(self, m=5, z=15, pressure_angle=20 * pi / 180., clearance=0.12, shift=0.5, beta=0.,
undercut=False, backlash=0.00, head=0.00):
self.pressure_angle = pressure_angle
self.beta = beta
self.m_n = m
@@ -34,16 +35,18 @@ class involute_tooth():
self.shift = shift
self.clearance = clearance
self.backlash = backlash
self.head = head # factor, rename!!!
self._calc_gear_factors()
def _calc_gear_factors(self):
print(self.head)
self.pressure_angle_t = arctan(tan(self.pressure_angle) / cos(self.beta))
self.m = self.m_n / cos(self.beta)
self.c = self.clearance * self.m_n
self.midpoint = [0., 0.]
self.d = self.z * self.m
self.dw = self.m * self.z
self.da = self.dw + 2. * self.m_n + 2. * self.shift * self.m_n
self.da = self.dw + 2. * self.m_n + 2. * (self.shift + self.head) * self.m_n
self.df = self.dw - 2. * self.m_n - \
2 * self.c + 2. * self.shift * self.m_n
self.dg = self.d * cos(self.pressure_angle_t)
@@ -146,7 +149,7 @@ class involute_tooth():
def _update(self):
self.__init__(m = self.m_n, z = self.z,
pressure_angle = self.pressure_angle, clearance = self.clearance, shift = self.shift,
beta = self.beta, undercut = self.undercut, backlash = self.backlash)
beta = self.beta, undercut = self.undercut, backlash = self.backlash, head = self.head)
class involute_rack(object):