108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
import cadquery as cq
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# parameter definitions
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p_outerWidth = 100.0 # Outer width of box enclosure
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p_outerLength = 150.0 # Outer length of box enclosure
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p_outerHeight = 50.0 # Outer height of box enclosure
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p_thickness = 3.0 # Thickness of the box walls
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p_sideRadius = 10.0 # Radius for the curves around the sides of the box
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p_topAndBottomRadius = (
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2.0 # Radius for the curves on the top and bottom edges of the box
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)
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p_screwpostInset = 12.0 # How far in from the edges the screw posts should be place.
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p_screwpostID = 4.0 # Inner Diameter of the screw post holes, should be roughly screw diameter not including threads
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p_screwpostOD = 10.0 # Outer Diameter of the screw posts.\nDetermines overall thickness of the posts
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p_boreDiameter = 8.0 # Diameter of the counterbore hole, if any
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p_boreDepth = 1.0 # Depth of the counterbore hole, if
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p_countersinkDiameter = 0.0 # Outer diameter of countersink. Should roughly match the outer diameter of the screw head
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p_countersinkAngle = 90.0 # Countersink angle (complete angle between opposite sides, not from center to one side)
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p_flipLid = True # Whether to place the lid with the top facing down or not.
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p_lipHeight = 1.0 # Height of lip on the underside of the lid.\nSits inside the box body for a snug fit.
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# outer shell
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oshell = (
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cq.Workplane("XY")
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.rect(p_outerWidth, p_outerLength)
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.extrude(p_outerHeight + p_lipHeight)
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)
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# weird geometry happens if we make the fillets in the wrong order
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if p_sideRadius > p_topAndBottomRadius:
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oshell = oshell.edges("|Z").fillet(p_sideRadius)
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oshell = oshell.edges("#Z").fillet(p_topAndBottomRadius)
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else:
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oshell = oshell.edges("#Z").fillet(p_topAndBottomRadius)
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oshell = oshell.edges("|Z").fillet(p_sideRadius)
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# inner shell
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ishell = (
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oshell.faces("<Z")
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.workplane(p_thickness, True)
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.rect((p_outerWidth - 2.0 * p_thickness), (p_outerLength - 2.0 * p_thickness))
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.extrude(
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(p_outerHeight - 2.0 * p_thickness), False
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) # set combine false to produce just the new boss
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)
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ishell = ishell.edges("|Z").fillet(p_sideRadius - p_thickness)
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# make the box outer box
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box = oshell.cut(ishell)
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# make the screw posts
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POSTWIDTH = p_outerWidth - 2.0 * p_screwpostInset
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POSTLENGTH = p_outerLength - 2.0 * p_screwpostInset
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box = (
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box.faces(">Z")
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.workplane(-p_thickness)
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.rect(POSTWIDTH, POSTLENGTH, forConstruction=True)
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.vertices()
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.circle(p_screwpostOD / 2.0)
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.circle(p_screwpostID / 2.0)
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.extrude(-1.0 * (p_outerHeight + p_lipHeight - p_thickness), True)
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)
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# split lid into top and bottom parts
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(lid, bottom) = (
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box.faces(">Z")
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.workplane(-p_thickness - p_lipHeight)
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.split(keepTop=True, keepBottom=True)
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.all()
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) # splits into two solids
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# translate the lid, and subtract the bottom from it to produce the lid inset
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lowerLid = lid.translate((0, 0, -p_lipHeight))
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cutlip = lowerLid.cut(bottom).translate(
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(p_outerWidth + p_thickness, 0, p_thickness - p_outerHeight + p_lipHeight)
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)
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# compute centers for screw holes
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topOfLidCenters = (
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cutlip.faces(">Z")
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.workplane(centerOption="CenterOfMass")
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.rect(POSTWIDTH, POSTLENGTH, forConstruction=True)
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.vertices()
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)
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# add holes of the desired type
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if p_boreDiameter > 0 and p_boreDepth > 0:
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topOfLid = topOfLidCenters.cboreHole(
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p_screwpostID, p_boreDiameter, p_boreDepth, 2.0 * p_thickness
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)
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elif p_countersinkDiameter > 0 and p_countersinkAngle > 0:
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topOfLid = topOfLidCenters.cskHole(
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p_screwpostID, p_countersinkDiameter, p_countersinkAngle, 2.0 * p_thickness
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)
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else:
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topOfLid = topOfLidCenters.hole(p_screwpostID, 2.0 * p_thickness)
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# flip lid upside down if desired
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if p_flipLid:
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topOfLid = topOfLid.rotateAboutCenter((1, 0, 0), 180)
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# return the combined result
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result = topOfLid.union(bottom)
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