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add cycloide gear foot- and headfillet

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This commit is contained in:
looooo
2021-06-13 16:09:02 +02:00
parent ae1c272c42
commit 403505ae95
1 changed files with 32 additions and 9 deletions
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41
freecad/gears/features.py
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@@ -501,6 +501,8 @@ class CycloidGear(BaseGear):
obj.addProperty("App::PropertyAngle", "beta", "gear_parameter", "beta")
obj.addProperty(
"App::PropertyLength", "backlash", "gear_parameter", "backlash in mm")
obj.addProperty("App::PropertyFloat", "head_fillet", "gear_parameter", "a fillet for the tooth-head, radius = head_fillet x module")
obj.addProperty("App::PropertyFloat", "foot_fillet", "gear_parameter", "a fillet for the tooth-foot, radius = foot_fillet x module")
obj.addProperty(
"App::PropertyFloat", "head", "gear_parameter", "head_value * modul_value = additional length of head")
obj.addProperty("App::PropertyPythonObject", "gear",
@@ -517,6 +519,8 @@ class CycloidGear(BaseGear):
obj.backlash = '0.00 mm'
obj.double_helix = False
obj.head = 0
obj.head_fillet = 0
obj.foot_fillet = 0
obj.Proxy = self
def execute(self, fp):
@@ -530,10 +534,31 @@ class CycloidGear(BaseGear):
fp.gear.backlash = fp.backlash.Value
fp.gear._update()
pts = fp.gear.points(num=fp.numpoints)
pts = fp.gear.points(num=fp.numpoints)
rot = rotation(-fp.gear.phipart)
pts.append([pts[-1][-1], rot(pts[0])[0]])
rotated_pts = list(map(rot, pts))
pts.append([pts[-1][-1],rotated_pts[0][0]])
pts += rotated_pts
tooth = points_to_wire(pts)
edges = tooth.Edges
r_head = float(fp.head_fillet * fp.module)
r_foot = float(fp.foot_fillet * fp.module)
pos_head = [0, 2, 6]
pos_foot = [4, 6]
edge_range = [1, 9]
for pos in pos_head:
edges = insert_fillet(edges, pos, r_head)
for pos in pos_foot:
edges = insert_fillet(edges, pos, r_foot)
edges = edges[edge_range[0]:edge_range[1]]
edges = [e for e in edges if e is not None]
tooth = Wire(edges)
wi = rotate_tooth(tooth, fp.teeth)
if fp.height.Value == 0:
fp.Shape = wi
@@ -1317,7 +1342,7 @@ def fillet_between_edges(edge_1, edge_2, radius):
except ImportError:
App.Console.PrintWarning("python-occ not available")
App.Console.PrintWarning("2d fillets not yet possible")
return Part.Wire(edge_1, edge_2)
return [edge_1, edge_2]
api = ChFi2d.ChFi2d_FilletAPI()
p1 = np.array([*edge_1.valueAt(edge_1.FirstParameter)])
@@ -1335,8 +1360,8 @@ def fillet_between_edges(edge_1, edge_2, radius):
occ_p0 = Core.gp.gp_Pnt(*((p2 + p3) / 2))
occ_arc = api.Result(occ_p0, occ_e1, occ_e2)
return Part.Wire([Part.__fromPythonOCC__(occ_e1),
Part.__fromPythonOCC__(occ_arc),
Part.__fromPythonOCC__(occ_e2)])
Part.__fromPythonOCC__(occ_arc),
Part.__fromPythonOCC__(occ_e2)]).Edges
else:
return None
@@ -1346,10 +1371,8 @@ def insert_fillet(edges, pos, radius):
e1 = edges[pos]
e2 = edges[pos + 1]
if radius > 0:
fillet = fillet_between_edges(e1, e2, radius)
if fillet:
fillet_edges = fillet.Edges
else:
fillet_edges = fillet_between_edges(e1, e2, radius)
if not fillet_edges:
raise RuntimeError("fillet not possible")
else:
fillet_edges = [e1, None, e2]