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Eliminate difficult geometry in angle joint

This commit is contained in:
Leni Aniva 2025-05-28 23:49:04 -07:00
parent 40c32213e1
commit af82a86652
Signed by: aniva
GPG Key ID: D5F96287843E8DFB
2 changed files with 76 additions and 22 deletions
nhf
materials.py
touhou/yasaka_kanako
onbashira.py

1
nhf/materials.py
View File

@ -90,6 +90,7 @@ class Material(Enum):
ACRYLIC_TRANSLUSCENT = 1.18, _color('ivory2', 0.8)
ACRYLIC_TRANSPARENT = 1.18, _color('ghostwhite', 0.5)
STEEL_SPRING = 7.8, _color('gray', 0.8)
STEEL_STAINLESS = 7.8, _color('gray', 0.9)
METAL_AL = 2.7, _color('gray', 0.6)
METAL_BRASS = 8.5, _color('gold1', 0.8)

97
nhf/touhou/yasaka_kanako/onbashira.py
View File

@ -68,21 +68,22 @@ class Onbashira(Model):
section1_gohei_loc: float = 30.0
gohei_bolt_diam: float = 6.0
# Joints between two sets of side panels
# The angle joint bridges between two sets of side panels.
# Extra thickness beyond the onbashira's body
angle_joint_thickness: float = 10.0
# Z-axis size of each angle joint
angle_joint_depth: float = 50.0
# Gap of each angle joint to connect the outside to the inside
angle_joint_gap: float = 8.0
angle_joint_bolt_length: float = 50.0
angle_joint_bolt_diam: float = 6.0
angle_joint_bolt_diam: float = BOLT_COMMON.diam_thread
angle_joint_bolt_head_diam: float = 13.0
angle_joint_bolt_head_depth: float = 3.0
# Position of the holes, with (0, 0) being the centre of each side
angle_joint_bolt_position: list[float] = field(default_factory=lambda: [
(40, 10),
])
angle_joint_flange_thickness: float = 7.8
angle_joint_flange_radius: float = 23.0
angle_joint_conn_thickness: float = 4.0
angle_joint_conn_depth: float = 15.0
@ -110,7 +111,7 @@ class Onbashira(Model):
bearing_disk_thickness: float = 25.4 / 8
rotor_inner_radius: float = 40.0
rotor_bind_bolt_diam: float = 6.0
rotor_bind_bolt_diam: float = BOLT_COMMON.diam_thread
rotor_bind_radius: float = 78.0
rotor_spacer_outer_diam: float = 15.0
stator_bind_radius: float = 135.0
@ -126,6 +127,7 @@ class Onbashira(Model):
material_bearing_ball: Material = Material.ACRYLIC_TRANSPARENT
material_barrel: Material = Material.ACRYLIC_BLACK
material_brace: Material = Material.PLASTIC_PLA
material_fastener: Material = Material.STEEL_STAINLESS
def __post_init__(self):
assert self.n_side >= 3
@ -320,6 +322,9 @@ class Onbashira(Model):
return outer - inner
def assembly_barrel(self) -> Cq.Assembly:
"""
The assembly with gun barrels
"""
z_lower = -self.bearing_disk_gap/2 - self.bearing_disk_thickness
a = (
Cq.Assembly()
@ -611,6 +616,34 @@ class Onbashira(Model):
return result
@target(name="chamber-back", kind=TargetKind.DXF)
def profile_chamber_back(self) -> Cq.Sketch:
return (
Cq.Sketch()
.regularPolygon(self.side_width - self.side_thickness, self.n_side)
.reset()
.regularPolygon(
self.stator_bind_radius, self.n_side,
mode="c", tag="bolt")
.vertices(tag="bolt")
.circle(self.rotor_bind_bolt_diam/2, mode="s")
)
def chamber_back(self) -> Cq.Workplane:
sketch = self.profile_chamber_back()
result = (
Cq.Workplane()
.placeSketch(sketch)
.extrude(self.side_thickness)
)
# Mark all attachment points
for i in range(self.n_side):
angle = (i+0.5) * math.radians(360 / self.n_side)
x = self.stator_bind_radius * math.cos(angle)
y = self.stator_bind_radius * math.sin(angle)
result.tagAbsolute(f"holeF{i}", (x, y, self.side_thickness), direction="+Z")
result.tagAbsolute(f"holeB{i}", (x, -y, 0), direction="-Z")
return result
def assembly_chamber(self) -> Cq.Assembly:
a = Cq.Assembly()
side = self.chamber_side_panel()
@ -761,11 +794,11 @@ class Onbashira(Model):
.reset()
.regularPolygon(self.side_width_inner, self.n_side, mode="i")
.finalize()
.extrude(self.angle_joint_flange_thickness)
.translate((0, 0, -self.angle_joint_flange_thickness/2))
.extrude(self.angle_joint_gap)
.translate((0, 0, -self.angle_joint_gap/2))
)
ri = self.stator_bind_radius
h = self.angle_joint_flange_thickness
h = self.angle_joint_gap
cyl = Cq.Solid.makeCylinder(
radius=self.rotor_bind_bolt_diam/2,
height=h,
@ -899,19 +932,19 @@ class Onbashira(Model):
.reset()
.regularPolygon(self.side_width_inner, self.n_side, mode="i")
.finalize()
.extrude(self.angle_joint_flange_thickness)
.extrude(self.angle_joint_gap)
.translate((0, 0, -flange_z))
)
ri = self.stator_bind_radius
h = self.angle_joint_flange_thickness
h = self.angle_joint_gap
cyl = Cq.Solid.makeCylinder(
radius=self.rotor_bind_bolt_diam/2,
height=h,
pnt=(ri * math.cos(th), ri * math.sin(th), -flange_z),
)
result = result + flange - cyl
result.tagAbsolute("holeStatorL", (ri * math.cos(th), ri * math.sin(th), -flange_z+h/2), direction="+Z")
result.tagAbsolute("holeStatorR", (ri * math.cos(th), ri * math.sin(th), -flange_z-h/2), direction="-Z")
result.tagAbsolute("holeStatorO", (ri * math.cos(th), ri * math.sin(th), -flange_z), direction="-Z")
result.tagAbsolute("holeStatorI", (ri * math.cos(th), ri * math.sin(th), -flange_z+h), direction="+Z")
return result
@target(name="angle-joint")
@ -1044,11 +1077,11 @@ class Onbashira(Model):
.reset()
.regularPolygon(self.side_width_inner, self.n_side, mode="i")
.finalize()
.extrude(self.angle_joint_flange_thickness)
.translate((0, 0, -self.angle_joint_flange_thickness/2))
.extrude(self.angle_joint_gap)
.translate((0, 0, -self.angle_joint_gap/2))
)
ri = self.stator_bind_radius
h = self.angle_joint_flange_thickness
h = self.angle_joint_gap
cyl = Cq.Solid.makeCylinder(
radius=self.rotor_bind_bolt_diam/2,
height=h,
@ -1135,7 +1168,7 @@ class Onbashira(Model):
)
.add(
self.assembly_ring(self.angle_joint_chamber_front()),
name="chamber_front",
name="ring3",
)
.add(
self.assembly_chamber(),
@ -1143,32 +1176,52 @@ class Onbashira(Model):
)
.add(
self.assembly_ring(self.angle_joint_chamber_back()),
name="chamber_back",
name="ring4",
)
.add(self.assembly_barrel(), name="barrel")
.addS(
self.chamber_back(),
name="chamber_back",
material=self.material_side,
role=Role.STRUCTURE | Role.DECORATION,
)
#.add(self.assembly_barrel(), name="barrel")
)
for i in range(self.n_side):
j = (i + 1) % self.n_side
for ih in range(len(self.angle_joint_bolt_position)):
a = a.constrain(
f"chamber/side{i}?holeFPI{ih}",
f"chamber_front/side{i}?holeRSO{ih}",
f"ring3/side{i}?holeRSO{ih}",
"Plane",
)
a = a.constrain(
f"chamber/side{i}?holeBPI{ih}",
f"chamber_back/side{i}?holeLSO{ih}",
f"ring4/side{i}?holeLSO{ih}",
"Plane",
)
a = a.constrain(
f"barrel/stator2?holeB{i}",
f"ring1/side{i}?holeStatorR",
f"ring4/side{i}?holeStatorO",
f"chamber_back?holeB{i}",
"Plane",
)
name_bolt =f"chamber_back{i}boltFPI{ih}"
a = a.addS(
BOLT_COMMON.generate(),
name=name_bolt,
material=self.material_fastener,
role=Role.CONNECTION,
)
a = a.constrain(
f"chamber_back?holeF{i}",
f"{name_bolt}?root",
"Plane",
param=0,
)
for (nl, nc, nr) in [
("section1", "ring1", "section2"),
("section2", "ring2", "section3"),
("section3", "chamber_front", None),
("section3", "ring3", None),
]:
a = a.constrain(
f"{nl}/side{i}?holeBSO{ih}",