cosplay: Touhou/Houjuu Nue #4

Open
aniva wants to merge 189 commits from touhou/houjuu-nue into main
2 changed files with 54 additions and 20 deletions
Showing only changes of commit 914bc23582 - Show all commits

View File

@ -1 +1 @@
from nhf.materials import Material
from nhf.materials import Material, Role

View File

@ -2,6 +2,13 @@ from dataclasses import dataclass
import math
import cadquery as Cq
import nhf.springs as NS
from nhf import Role
def hirth_tooth_angle(n_tooth):
"""
Angle of one whole tooth
"""
return 360 / n_tooth
def hirth_joint(radius=60,
radius_inner=40,
@ -9,9 +16,13 @@ def hirth_joint(radius=60,
n_tooth=16,
tooth_height=16,
tooth_height_inner=2,
tol=0.01):
tol=0.01,
tag_prefix="",
is_mated=False):
"""
Creates a cylindrical Hirth Joint
is_mated: If set to true, rotate the teeth so they line up at 0 degrees.
"""
# ensures secant doesn't blow up
assert n_tooth >= 5
@ -51,9 +62,14 @@ def hirth_joint(radius=60,
.val()
)
tooth_centre_radius = radius_inner * math.cos(theta)
angle_offset = hirth_tooth_angle(n_tooth) / 2 if is_mated else 0
teeth = (
Cq.Workplane('XY')
.polarArray(radius=tooth_centre_radius, startAngle=0, angle=360, count=n_tooth)
.polarArray(
radius=tooth_centre_radius,
startAngle=angle_offset,
angle=360,
count=n_tooth)
.eachpoint(lambda loc: tooth.located(loc))
.intersect(Cq.Solid.makeCylinder(
height=base_height + tooth_height,
@ -66,36 +82,54 @@ def hirth_joint(radius=60,
height=base_height,
radius=radius,
centered=(True, True, False))
.faces(">Z").tag("bore")
.faces(">Z").tag(f"{tag_prefix}bore")
.union(teeth.val().move(Cq.Location((0,0,base_height))), tol=tol)
.clean()
)
#base.workplane(offset=tooth_height/2).circle(radius=radius,forConstruction=True).tag("mate")
base.polyline([(0, 0, base_height), (0, 0, base_height+tooth_height)], forConstruction=True).tag("mate")
(
base
.polyline([(0, 0, base_height), (0, 0, base_height+tooth_height)], forConstruction=True)
.tag(f"{tag_prefix}mate")
)
(
base
.polyline([(0, 0, 0), (1, 0, 0)], forConstruction=True)
.tag(f"{tag_prefix}directrix")
)
return base
def hirth_assembly():
def hirth_assembly(n_tooth=12):
"""
Example assembly of two Hirth joints
"""
rotate = 180 / 16
obj1 = hirth_joint().faces(tag="bore").cboreHole(
diameter=10,
cboreDiameter=20,
cboreDepth=3)
obj2 = (
hirth_joint()
.rotate(
axisStartPoint=(0,0,0),
axisEndPoint=(0,0,1),
angleDegrees=rotate
)
#rotate = 180 / 16
tab = (
Cq.Workplane('XY')
.box(100, 10, 2, centered=False)
)
obj1 = (
hirth_joint(n_tooth=n_tooth)
.faces(tag="bore")
.cboreHole(
diameter=10,
cboreDiameter=20,
cboreDepth=3)
.union(tab)
)
obj2 = (
hirth_joint(n_tooth=n_tooth, is_mated=True)
.union(tab)
)
angle = hirth_tooth_angle(n_tooth)
result = (
Cq.Assembly()
.add(obj1, name="obj1", color=Cq.Color(0.8,0.8,0.5,0.3))
.add(obj2, name="obj2", color=Cq.Color(0.5,0.5,0.5,0.3))
.add(obj1, name="obj1", color=Role.PARENT.color)
.add(obj2, name="obj2", color=Role.CHILD.color)
.constrain("obj1", "Fixed")
.constrain("obj1?mate", "obj2?mate", "Plane")
.constrain("obj1?directrix", "obj2?directrix", "Axis", param=angle)
.solve()
)
return result