Jerry
114 lines
3.3 KiB
Python
114 lines
3.3 KiB
Python
from build123d import (
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Align,
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Box,
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BuildPart,
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BuildSketch,
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Cylinder,
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Location,
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Locations,
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Mode,
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Plane,
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Polygon,
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add,
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extrude,
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)
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from benchmark_common import safe_fillet
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BASE_LENGTH = 80.0
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BASE_WIDTH = 50.0
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BASE_THICKNESS = 8.0
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BACK_LENGTH = 80.0
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BACK_THICKNESS = 8.0
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BACK_HEIGHT = 50.0
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BACK_CENTER_Y = BASE_WIDTH / 2.0 - BACK_THICKNESS / 2.0
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HOLE_DIAMETER = 6.0
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BASE_HOLE_LOCATIONS = ((-25.0, -10.0), (25.0, -10.0))
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BACK_HOLE_LOCATIONS = ((-25.0, 30.0), (25.0, 30.0))
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GUSSET_X_THICKNESS = 8.0
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GUSSET_X_LOCATIONS = (-20.0, 20.0)
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GUSSET_DEPTH = 30.0
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GUSSET_HEIGHT = 30.0
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TRANSITION_FILLET = 2.0
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def _make_gusset(x_center: float):
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back_front_y = BACK_CENTER_Y - BACK_THICKNESS / 2.0
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front_y = back_front_y - GUSSET_DEPTH
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top_z = BASE_THICKNESS + GUSSET_HEIGHT
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with BuildPart() as gusset:
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with BuildSketch(Plane.YZ):
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Polygon(
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[
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(back_front_y, BASE_THICKNESS),
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(front_y, BASE_THICKNESS),
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(back_front_y, top_z),
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],
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align=None,
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)
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extrude(amount=GUSSET_X_THICKNESS)
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part = gusset.part.moved(Location((x_center - GUSSET_X_THICKNESS / 2.0, 0.0, 0.0)))
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part.label = f"gusset_x_{x_center:.0f}"
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return part
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def _transition_edges(part):
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edges = []
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for edge in part.edges():
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bbox = edge.bounding_box()
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if str(edge.geom_type).endswith("LINE"):
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if abs(bbox.min.Z - BASE_THICKNESS) < 0.05 and abs(bbox.max.Z - BASE_THICKNESS) < 0.05:
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center_y = bbox.center().Y
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if BACK_CENTER_Y - BACK_THICKNESS / 2.0 - 0.05 <= center_y <= BASE_WIDTH / 2.0 + 0.05:
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if bbox.size.X > 20.0:
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edges.append(edge)
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return edges
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def gen_step():
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"""Return the L-bracket benchmark model in millimeters."""
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with BuildPart() as bracket:
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Box(BASE_LENGTH, BASE_WIDTH, BASE_THICKNESS, align=(Align.CENTER, Align.CENTER, Align.MIN))
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with Locations(Location((0.0, BACK_CENTER_Y, BASE_THICKNESS))):
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Box(
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BACK_LENGTH,
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BACK_THICKNESS,
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BACK_HEIGHT,
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align=(Align.CENTER, Align.CENTER, Align.MIN),
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mode=Mode.ADD,
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)
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for x_pos, y_pos in BASE_HOLE_LOCATIONS:
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with Locations(Location((x_pos, y_pos, -1.0))):
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Cylinder(
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radius=HOLE_DIAMETER / 2.0,
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height=BASE_THICKNESS + 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 x_pos, z_pos in BACK_HOLE_LOCATIONS:
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with Locations(Location((x_pos, BACK_CENTER_Y, z_pos))):
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Cylinder(
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radius=HOLE_DIAMETER / 2.0,
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height=BACK_THICKNESS + 2.0,
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rotation=(90.0, 0.0, 0.0),
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align=(Align.CENTER, Align.CENTER, Align.CENTER),
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mode=Mode.SUBTRACT,
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)
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for x_center in GUSSET_X_LOCATIONS:
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add(_make_gusset(x_center), mode=Mode.ADD)
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part = bracket.part
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part = safe_fillet(part, _transition_edges(part), radius=TRANSITION_FILLET)
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part.label = "benchmark_03_l_bracket_gussets_two_hole_directions"
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return part
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