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