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feat: Harness assembly

This commit is contained in:
Leni Aniva 2024-06-23 22:27:15 -07:00
parent 376580003e
commit eb8a48fe77
Signed by: aniva
GPG Key ID: 4D9B1C8D10EA4C50
4 changed files with 155 additions and 19 deletions
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1
nhf/__init__.py
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@ -0,0 +1 @@
from nhf.materials import Material

18
nhf/materials.py Normal file
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@ -0,0 +1,18 @@
"""
A catalog of material properties
"""
from enum import Enum
import cadquery as Cq
def _color(name: str, alpha: float) -> Cq.Color:
r, g, b, _ = Cq.Color(name).toTuple()
return Cq.Color(r, g, b, alpha)
class Material(Enum):
WOOD_BIRCH = 0.8, _color('bisque', 0.9)
PLASTIC_PLA = 0.5, _color('azure3', 0.6)
def __init__(self, density: float, color: Cq.Color):
self.density = density
self.color = color

152
nhf/touhou/houjuu_nue/__init__.py
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@ -2,6 +2,7 @@ from dataclasses import dataclass
import unittest
import cadquery as Cq
import nhf.joints
from nhf import Material
@dataclass(frozen=True)
class Parameters:
@ -11,8 +12,39 @@ class Parameters:
"""
panel_thickness: float = 25.4 / 16
# Harness
harness_thickness: float = 25.4 / 8
harness_width = 300
harness_height = 400
harness_fillet = 10
harness_wing_base_pos = [
("r1", 70, 150),
("l1", -70, 150),
("r2", 100, 0),
("l2", -100, 0),
("r3", 70, -150),
("l3", -70, -150),
]
# Holes drilled onto harness for attachment with HS joint
harness_to_wing_base_hole_diam = 6
# Wing root properties
"""
The Houjuu-Scarlett joint mechanism at the base of the wing
"""
hs_joint_base_width = 85
hs_joint_base_thickness = 10
hs_joint_ring_thickness = 5
hs_joint_tooth_height = 10
hs_joint_radius = 30
hs_joint_radius_inner = 20
hs_joint_corner_fillet = 5
hs_joint_corner_cbore_diam = 12
hs_joint_corner_cbore_depth = 12
hs_joint_corner_inset = 15
"""
Radius of the mounting mechanism of the wing root. This is constrained by
the size of the harness.
"""
@ -26,26 +58,77 @@ class Parameters:
wing_r2_height = 100
wing_r3_height = 100
"""
The Houjuu-Scarlett joint mechanism at the base of the wing
"""
hs_joint_base_width = 85
hs_joint_base_thickness = 10
hs_joint_ring_thickness = 10
hs_joint_tooth_height = 10
hs_joint_radius = 30
hs_joint_radius_inner = 20
hs_joint_corner_fillet = 5
hs_joint_corner_cbore_diam = 12
hs_joint_corner_cbore_depth = 12
hs_joint_corner_diam = 15
hs_joint_corner_inset = 15
def print_geometries(self):
return [
self.hs_joint_parent()
]
def harness_profile(self) -> Cq.Sketch:
"""
Creates the harness shape
"""
w, h = self.harness_width / 2, self.harness_height / 2
sketch = (
Cq.Sketch()
.polygon([
(0.7 * w, h),
(w, 0),
(0.7 * w, -h),
(0.7 * -w, -h),
(-w, 0),
(0.7 * -w, h),
])
#.rect(self.harness_width, self.harness_height)
.vertices()
.fillet(self.harness_fillet)
)
for tag, x, y in self.harness_wing_base_pos:
conn = [(px + x, py + y) for px, py in self.hs_joint_harness_conn()]
sketch = (
sketch
.push(conn)
.tag(tag)
.circle(self.harness_to_wing_base_hole_diam / 2, mode='s')
.reset()
)
return sketch
def harness(self) -> Cq.Shape:
"""
Creates the harness shape
"""
result = (
Cq.Workplane('XZ')
.placeSketch(self.harness_profile())
.extrude(self.harness_thickness)
)
result.faces(">Y").tag("mount")
plane = result.faces(">Y").workplane()
for tag, x, y in self.harness_wing_base_pos:
conn = [(px + x, py + y) for px, py in self.hs_joint_harness_conn()]
for i, (px, py) in enumerate(conn):
(
plane
.moveTo(px, py)
.circle(1, forConstruction='True')
.edges()
.tag(f"{tag}_{i}")
)
return result
def hs_joint_harness_conn(self) -> list[tuple[int, int]]:
"""
Generates a set of points corresponding to the connectorss
"""
dx = self.hs_joint_base_width / 2 - self.hs_joint_corner_inset
return [
(dx, dx),
(dx, -dx),
(-dx, -dx),
(-dx, dx),
]
def hs_joint_parent(self):
"""
Parent part of the Houjuu-Scarlett joint, which is composed of a Hirth
@ -56,7 +139,6 @@ class Parameters:
radius_inner=self.hs_joint_radius_inner,
tooth_height=self.hs_joint_tooth_height,
base_height=self.hs_joint_ring_thickness)
hole_rect_width = self.hs_joint_base_width - 2 * self.hs_joint_corner_inset
hirth = (
hirth
.faces("<Z")
@ -69,6 +151,7 @@ class Parameters:
.hole(5)
.val()
)
conn = self.hs_joint_harness_conn()
result = (
Cq.Workplane('XY')
.box(
@ -80,17 +163,29 @@ class Parameters:
.fillet(self.hs_joint_corner_fillet)
.faces(">Z")
.workplane()
.rect(hole_rect_width, hole_rect_width, forConstruction=True)
.vertices()
.pushPoints(conn)
.cboreHole(
diameter=self.hs_joint_corner_diam,
diameter=self.harness_to_wing_base_hole_diam,
cboreDiameter=self.hs_joint_corner_cbore_diam,
cboreDepth=self.hs_joint_corner_cbore_depth)
)
plane = result.faces(">Z").workplane(offset=-self.hs_joint_base_thickness)
for i, (px, py) in enumerate(conn):
(
plane
.moveTo(px, py)
.circle(1, forConstruction='True')
.edges()
.tag(f"h{i}")
)
result = (
result
.faces(">Z")
.workplane()
.union(hirth.move((0, 0, self.hs_joint_base_thickness)), tol=0.1)
.union(hirth.move(Cq.Location((0, 0, self.hs_joint_base_thickness))), tol=0.1)
.clean()
)
result.faces("<Z").tag("base")
return result
@ -152,3 +247,22 @@ class Parameters:
)
return result
def harness_assembly(self):
harness = self.harness()
result = (
Cq.Assembly()
.add(harness, name="harness", color=Material.WOOD_BIRCH.color)
.constrain("harness", "Fixed")
)
for name in ["l1", "l2", "l3", "r1", "r2", "r3"]:
j = self.hs_joint_parent()
(
result
.add(j, name=f"hs_{name}p", color=Material.PLASTIC_PLA.color)
#.constrain(f"harness?{name}", f"hs_{name}p?mate", "Point")
.constrain("harness?mount", f"hs_{name}p?base", "Axis")
)
for i in range(4):
result.constrain(f"harness?{name}_{i}", f"hs_{name}p?h{i}", "Point")
result.solve()
return result

3
nhf/touhou/houjuu_nue/test.py
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@ -9,6 +9,9 @@ class Test(unittest.TestCase):
def test_wings(self):
p = M.Parameters()
p.wing_r1()
def test_harness(self):
p = M.Parameters()
p.harness_assembly()
if __name__ == '__main__':
unittest.main()