Import CAD projects and cad-router v1

2026-07-22 19:38:36 +08:00
parent e4e0199bd5
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+"""Parametric eight-hole circular flange generated with build123d."""
+
+from math import cos, radians, sin
+
+from build123d import Align, BuildPart, Cylinder, Location, Locations, Mode
+
+
+OUTER_DIAMETER_MM = 50.0
+INNER_DIAMETER_MM = 20.0
+THICKNESS_MM = 4.0
+BOLT_HOLE_COUNT = 8
+M3_CLEARANCE_DIAMETER_MM = 3.4
+BOLT_CIRCLE_DIAMETER_MM = 40.0
+
+
+def polar_point(radius: float, angle_degrees: float) -> tuple[float, float]:
+    angle = radians(angle_degrees)
+    return radius * cos(angle), radius * sin(angle)
+
+
+def gen_step():
+    """Return one STEP-ready flange solid in millimeters."""
+    with BuildPart() as flange:
+        Cylinder(
+            radius=OUTER_DIAMETER_MM / 2.0,
+            height=THICKNESS_MM,
+            align=(Align.CENTER, Align.CENTER, Align.MIN),
+        )
+
+        with Locations(Location((0.0, 0.0, -1.0))):
+            Cylinder(
+                radius=INNER_DIAMETER_MM / 2.0,
+                height=THICKNESS_MM + 2.0,
+                align=(Align.CENTER, Align.CENTER, Align.MIN),
+                mode=Mode.SUBTRACT,
+            )
+
+        for index in range(BOLT_HOLE_COUNT):
+            angle_degrees = 360.0 * index / BOLT_HOLE_COUNT
+            x_pos, y_pos = polar_point(BOLT_CIRCLE_DIAMETER_MM / 2.0, angle_degrees)
+            with Locations(Location((x_pos, y_pos, -1.0))):
+                Cylinder(
+                    radius=M3_CLEARANCE_DIAMETER_MM / 2.0,
+                    height=THICKNESS_MM + 2.0,
+                    align=(Align.CENTER, Align.CENTER, Align.MIN),
+                    mode=Mode.SUBTRACT,
+                )
+
+    part = flange.part
+    part.label = "flange_8x_m3_clearance"
+    return part