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 build123d import Align, Box, BuildPart, Cylinder, Location, Locations, Mode
+
+from benchmark_common import circular_edges, safe_chamfer
+
+
+TOTAL_LENGTH = 120.0
+LEFT_LENGTH = 30.0
+MIDDLE_LENGTH = 60.0
+RIGHT_LENGTH = 30.0
+SMALL_DIAMETER = 20.0
+MIDDLE_DIAMETER = 30.0
+END_CHAMFER = 1.0
+
+KEYWAY_X_START = 40.0
+KEYWAY_X_END = 80.0
+KEYWAY_WIDTH = 6.0
+KEYWAY_DEPTH = 3.0
+
+
+def _add_shaft_section(x_start: float, x_end: float, diameter: float):
+    with Locations(Location(((x_start + x_end) / 2.0, 0.0, 0.0))):
+        Cylinder(
+            radius=diameter / 2.0,
+            height=x_end - x_start,
+            rotation=(0.0, 90.0, 0.0),
+            align=(Align.CENTER, Align.CENTER, Align.CENTER),
+            mode=Mode.ADD,
+        )
+
+
+def gen_step():
+    """Return the stepped shaft with keyway benchmark model in millimeters."""
+    with BuildPart() as shaft:
+        _add_shaft_section(0.0, LEFT_LENGTH, SMALL_DIAMETER)
+        _add_shaft_section(LEFT_LENGTH, LEFT_LENGTH + MIDDLE_LENGTH, MIDDLE_DIAMETER)
+        _add_shaft_section(LEFT_LENGTH + MIDDLE_LENGTH, TOTAL_LENGTH, SMALL_DIAMETER)
+
+        with Locations(Location(((KEYWAY_X_START + KEYWAY_X_END) / 2.0, 0.0, MIDDLE_DIAMETER / 2.0 - KEYWAY_DEPTH))):
+            Box(
+                KEYWAY_X_END - KEYWAY_X_START,
+                KEYWAY_WIDTH,
+                KEYWAY_DEPTH + 2.0,
+                align=(Align.CENTER, Align.CENTER, Align.MIN),
+                mode=Mode.SUBTRACT,
+            )
+
+    part = shaft.part
+    end_edges = []
+    end_edges.extend(circular_edges(part, radius=SMALL_DIAMETER / 2.0, axis="x", coordinate=0.0))
+    end_edges.extend(circular_edges(part, radius=SMALL_DIAMETER / 2.0, axis="x", coordinate=TOTAL_LENGTH))
+    part = safe_chamfer(part, end_edges, length=END_CHAMFER)
+    part.label = "benchmark_04_stepped_shaft_keyway"
+    return part