Import CAD projects and cad-router v1

2026-07-22 19:38:36 +08:00
parent e4e0199bd5
commit af9f630c11
2253 changed files with 1994207 additions and 0 deletions
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+from math import cos, radians, sin
+
+from build123d import (
+    Align,
+    BuildLine,
+    BuildPart,
+    BuildSketch,
+    CenterArc,
+    Circle,
+    Color,
+    Compound,
+    Cylinder,
+    Edge,
+    Line,
+    Location,
+    Plane,
+    extrude,
+    make_face,
+    sweep,
+)
+
+
+# Units: millimeters.
+# Origin: centered on the staircase axis; base/column bottom starts at Z=0.
+# XY: plan view. +Z: staircase rise direction.
+
+BASE_DIAMETER = 90.0
+BASE_THICKNESS = 5.0
+
+COLUMN_DIAMETER = 14.0
+COLUMN_HEIGHT = 140.0
+
+TREAD_COUNT = 20
+TREAD_THICKNESS = 4.0
+TREAD_INNER_RADIUS = 10.0
+TREAD_OUTER_RADIUS = 62.0
+TREAD_SWEEP_DEGREES = 24.0
+TREAD_FIRST_BOTTOM_Z = 4.0
+TREAD_RISE = 6.0
+TREAD_ROTATION_DEGREES = 18.0
+
+HANDRAIL_RADIUS = 66.0
+HANDRAIL_TUBE_DIAMETER = 5.0
+HANDRAIL_START_Z = 14.0
+HANDRAIL_END_Z = 130.0
+
+BALUSTER_DIAMETER = 3.0
+
+def _polar_point(radius: float, angle_degrees: float) -> tuple[float, float]:
+    angle_radians = radians(angle_degrees)
+    return (radius * cos(angle_radians), radius * sin(angle_radians))
+
+
+def _make_base():
+    with BuildPart() as base:
+        Cylinder(
+            radius=BASE_DIAMETER / 2.0,
+            height=BASE_THICKNESS,
+            align=(Align.CENTER, Align.CENTER, Align.MIN),
+        )
+
+    part = base.part
+    part.label = "circular_base_disk_diameter_90mm_thickness_5mm"
+    part.color = Color(0.42, 0.43, 0.45, 1.0)
+    return part
+
+
+def _make_column():
+    with BuildPart() as column:
+        Cylinder(
+            radius=COLUMN_DIAMETER / 2.0,
+            height=COLUMN_HEIGHT,
+            align=(Align.CENTER, Align.CENTER, Align.MIN),
+        )
+
+    part = column.part
+    part.label = "central_column_diameter_14mm_height_140mm"
+    part.color = Color(0.70, 0.72, 0.74, 1.0)
+    return part
+
+
+def _make_tread_profile():
+    half_sweep = TREAD_SWEEP_DEGREES / 2.0
+    start_angle = -half_sweep
+    end_angle = half_sweep
+
+    with BuildPart() as tread:
+        with BuildSketch(Plane.XY):
+            with BuildLine():
+                CenterArc((0.0, 0.0), TREAD_OUTER_RADIUS, start_angle, TREAD_SWEEP_DEGREES)
+                Line(
+                    _polar_point(TREAD_OUTER_RADIUS, end_angle),
+                    _polar_point(TREAD_INNER_RADIUS, end_angle),
+                )
+                CenterArc((0.0, 0.0), TREAD_INNER_RADIUS, end_angle, -TREAD_SWEEP_DEGREES)
+                Line(
+                    _polar_point(TREAD_INNER_RADIUS, start_angle),
+                    _polar_point(TREAD_OUTER_RADIUS, start_angle),
+                )
+            make_face()
+        extrude(amount=TREAD_THICKNESS)
+
+    part = tread.part
+    part.label = "tread_profile_inner_10mm_outer_62mm_sweep_24deg"
+    part.color = Color(0.78, 0.58, 0.35, 1.0)
+    return part
+
+
+def _make_tread(index: int):
+    angle_degrees = index * TREAD_ROTATION_DEGREES
+    bottom_z = TREAD_FIRST_BOTTOM_Z + index * TREAD_RISE
+    tread_profile = _make_tread_profile()
+    tread = tread_profile.moved(Location((0.0, 0.0, bottom_z), (0.0, 0.0, angle_degrees)))
+    tread.label = f"tread_{index + 1:02d}_bottom_z_{bottom_z:.0f}mm_angle_{angle_degrees:.0f}deg"
+    return tread
+
+
+def _handrail_center_z(angle_degrees: float) -> float:
+    rail_rise = HANDRAIL_END_Z - HANDRAIL_START_Z
+    return HANDRAIL_START_Z + rail_rise * angle_degrees / 360.0
+
+
+def _make_handrail():
+    rail_height = HANDRAIL_END_Z - HANDRAIL_START_Z
+    path = Edge.make_helix(
+        pitch=rail_height,
+        height=rail_height,
+        radius=HANDRAIL_RADIUS,
+        center=(0.0, 0.0, HANDRAIL_START_Z),
+    )
+    start_tangent = path.tangent_at(0.0)
+    profile_plane = Plane(
+        origin=(HANDRAIL_RADIUS, 0.0, HANDRAIL_START_Z),
+        x_dir=(1.0, 0.0, 0.0),
+        z_dir=start_tangent,
+    )
+
+    with BuildPart() as rail:
+        with BuildSketch(profile_plane):
+            Circle(HANDRAIL_TUBE_DIAMETER / 2.0)
+        sweep(path=path, is_frenet=True)
+
+    part = rail.part
+    part.label = "helical_outer_handrail_radius_66mm_diameter_5mm"
+    part.color = Color(0.22, 0.28, 0.34, 1.0)
+    return part
+
+
+def _make_baluster(index: int):
+    angle_degrees = index * TREAD_ROTATION_DEGREES
+    tread_top_z = TREAD_FIRST_BOTTOM_Z + index * TREAD_RISE + TREAD_THICKNESS
+    rail_center_z = _handrail_center_z(angle_degrees)
+    x_pos, y_pos = _polar_point(TREAD_OUTER_RADIUS, angle_degrees)
+    height = rail_center_z - tread_top_z
+
+    with BuildPart() as baluster:
+        Cylinder(
+            radius=BALUSTER_DIAMETER / 2.0,
+            height=height,
+            align=(Align.CENTER, Align.CENTER, Align.MIN),
+        )
+
+    part = baluster.part.moved(Location((x_pos, y_pos, tread_top_z)))
+    part.label = f"baluster_{index + 1:02d}_diameter_3mm"
+    part.color = Color(0.30, 0.33, 0.36, 1.0)
+    return part
+
+
+def gen_step():
+    """Return a labeled miniature spiral staircase STEP compound in millimeters."""
+    parts = [
+        _make_base(),
+        _make_column(),
+    ]
+
+    for index in range(TREAD_COUNT):
+        parts.append(_make_tread(index))
+
+    parts.append(_make_handrail())
+
+    for index in range(TREAD_COUNT):
+        parts.append(_make_baluster(index))
+
+    assembly = Compound(
+        obj=parts,
+        children=parts,
+        label="miniature_spiral_staircase",
+    )
+    return assembly