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