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traverse pitch computation

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looooo
2022-12-28 13:32:51 +01:00
parent 84026d912b
commit bc41c864a1
1 changed files with 40 additions and 36 deletions
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76
freecad/gears/features.py
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@@ -157,6 +157,7 @@ class InvoluteGear(BaseGear):
obj.root_fillet = 0
self.obj = obj
obj.Proxy = self
self.compute_traverse_properties(obj)
def add_gear_properties(self, obj):
obj.addProperty("App::PropertyInteger", "teeth", "base", "number of teeth")
@@ -213,35 +214,38 @@ class InvoluteGear(BaseGear):
obj.addProperty("App::PropertyInteger", "numpoints",
"accuracy", "number of points for spline")
def generate_gear_shape(self, fp):
fp.gear.double_helix = fp.double_helix
fp.gear.m_n = fp.module.Value
fp.gear.z = fp.teeth
fp.gear.undercut = fp.undercut
fp.gear.shift = fp.shift
fp.gear.pressure_angle = fp.pressure_angle.Value * np.pi / 180.
fp.gear.beta = fp.beta.Value * np.pi / 180
fp.gear.clearance = fp.clearance
fp.gear.backlash = fp.backlash.Value * \
(-fp.reversed_backlash + 0.5) * 2.
fp.gear.head = fp.head
# checksbackwardcompatibility:
if "properties_from_tool" in fp.PropertiesList:
fp.gear.properties_from_tool = fp.properties_from_tool
fp.traverse_module = fp.module / np.cos(fp.gear.beta)
def compute_traverse_properties(self, obj):
if "properties_from_tool" in obj.PropertiesList:
obj.gear.properties_from_tool = obj.properties_from_tool
obj.traverse_module = obj.module / np.cos(obj.gear.beta)
else:
fp.traverse_module = fp.module
fp.gear._update()
obj.traverse_module = obj.module
# computed properties
fp.transverse_pitch = "{}mm".format(fp.gear.pitch)
fp.da = "{}mm".format(fp.gear.da)
fp.df = "{}mm".format(fp.gear.df)
obj.transverse_pitch = "{}mm".format(obj.gear.pitch)
obj.da = "{}mm".format(obj.gear.da)
obj.df = "{}mm".format(obj.gear.df)
if not fp.simple:
def generate_gear_shape(self, obj):
obj.gear.double_helix = obj.double_helix
obj.gear.m_n = obj.module.Value
obj.gear.z = obj.teeth
obj.gear.undercut = obj.undercut
obj.gear.shift = obj.shift
obj.gear.pressure_angle = obj.pressure_angle.Value * np.pi / 180.
obj.gear.beta = obj.beta.Value * np.pi / 180
obj.gear.clearance = obj.clearance
obj.gear.backlash = obj.backlash.Value * \
(-obj.reversed_backlash + 0.5) * 2.
obj.gear.head = obj.head
obj.gear._update()
pts = fp.gear.points(num=fp.numpoints)
rot = rotation(-fp.gear.phipart)
self.compute_traverse_properties(obj)
if not obj.simple:
pts = obj.gear.points(num=obj.numpoints)
rot = rotation(-obj.gear.phipart)
rotated_pts = list(map(rot, pts))
pts.append([pts[-1][-1],rotated_pts[0][0]])
pts += rotated_pts
@@ -249,9 +253,9 @@ class InvoluteGear(BaseGear):
edges = tooth.Edges
# head-fillet:
r_head = float(fp.head_fillet * fp.module)
r_root = float(fp.root_fillet * fp.module)
if fp.undercut and r_root != 0.:
r_head = float(obj.head_fillet * obj.module)
r_root = float(obj.root_fillet * obj.module)
if obj.undercut and r_root != 0.:
r_root = 0.
App.Console.PrintWarning("root fillet is not allowed if undercut is computed")
if len(tooth.Edges) == 11:
@@ -281,19 +285,19 @@ class InvoluteGear(BaseGear):
edges = [e for e in edges if e is not None]
tooth = Wire(edges)
profile = rotate_tooth(tooth, fp.teeth)
profile = rotate_tooth(tooth, obj.teeth)
if fp.height.Value == 0:
if obj.height.Value == 0:
return profile
base = Face(profile)
if fp.beta.Value == 0:
return base.extrude(App.Vector(0, 0, fp.height.Value))
if obj.beta.Value == 0:
return base.extrude(App.Vector(0, 0, obj.height.Value))
else:
twist_angle = fp.height.Value * np.tan(fp.gear.beta) * 2 / fp.gear.d
return helicalextrusion(base, fp.height.Value, twist_angle, fp.double_helix)
twist_angle = obj.height.Value * np.tan(obj.gear.beta) * 2 / obj.gear.d
return helicalextrusion(base, obj.height.Value, twist_angle, obj.double_helix)
else:
rw = fp.gear.dw / 2
return Part.makeCylinder(rw, fp.height.Value)
rw = obj.gear.dw / 2
return Part.makeCylinder(rw, obj.height.Value)
def __getstate__(self):
return None