Misc-3D-Prints/Electronics and Digital Fabrication/relay_enclosure/enclosure.py

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2022-09-12 16:23:58 -04:00
import cadquery as cq
# parameter definitions
p_outerWidth = 100.0 # Outer width of box enclosure
p_outerLength = 150.0 # Outer length of box enclosure
p_outerHeight = 50.0 # Outer height of box enclosure
p_thickness = 3.0 # Thickness of the box walls
p_sideRadius = 10.0 # Radius for the curves around the sides of the box
p_topAndBottomRadius = (
2.0 # Radius for the curves on the top and bottom edges of the box
)
p_screwpostInset = 12.0 # How far in from the edges the screw posts should be place.
p_screwpostID = 4.0 # Inner Diameter of the screw post holes, should be roughly screw diameter not including threads
p_screwpostOD = 10.0 # Outer Diameter of the screw posts.\nDetermines overall thickness of the posts
p_boreDiameter = 8.0 # Diameter of the counterbore hole, if any
p_boreDepth = 1.0 # Depth of the counterbore hole, if
p_countersinkDiameter = 0.0 # Outer diameter of countersink. Should roughly match the outer diameter of the screw head
p_countersinkAngle = 90.0 # Countersink angle (complete angle between opposite sides, not from center to one side)
p_flipLid = True # Whether to place the lid with the top facing down or not.
p_lipHeight = 1.0 # Height of lip on the underside of the lid.\nSits inside the box body for a snug fit.
# outer shell
oshell = (
cq.Workplane("XY")
.rect(p_outerWidth, p_outerLength)
.extrude(p_outerHeight + p_lipHeight)
)
# weird geometry happens if we make the fillets in the wrong order
if p_sideRadius > p_topAndBottomRadius:
oshell = oshell.edges("|Z").fillet(p_sideRadius)
oshell = oshell.edges("#Z").fillet(p_topAndBottomRadius)
else:
oshell = oshell.edges("#Z").fillet(p_topAndBottomRadius)
oshell = oshell.edges("|Z").fillet(p_sideRadius)
# inner shell
ishell = (
oshell.faces("<Z")
.workplane(p_thickness, True)
.rect((p_outerWidth - 2.0 * p_thickness), (p_outerLength - 2.0 * p_thickness))
.extrude(
(p_outerHeight - 2.0 * p_thickness), False
) # set combine false to produce just the new boss
)
ishell = ishell.edges("|Z").fillet(p_sideRadius - p_thickness)
# make the box outer box
box = oshell.cut(ishell)
# make the screw posts
POSTWIDTH = p_outerWidth - 2.0 * p_screwpostInset
POSTLENGTH = p_outerLength - 2.0 * p_screwpostInset
box = (
box.faces(">Z")
.workplane(-p_thickness)
.rect(POSTWIDTH, POSTLENGTH, forConstruction=True)
.vertices()
.circle(p_screwpostOD / 2.0)
.circle(p_screwpostID / 2.0)
.extrude(-1.0 * (p_outerHeight + p_lipHeight - p_thickness), True)
)
# split lid into top and bottom parts
(lid, bottom) = (
box.faces(">Z")
.workplane(-p_thickness - p_lipHeight)
.split(keepTop=True, keepBottom=True)
.all()
) # splits into two solids
# translate the lid, and subtract the bottom from it to produce the lid inset
lowerLid = lid.translate((0, 0, -p_lipHeight))
cutlip = lowerLid.cut(bottom).translate(
(p_outerWidth + p_thickness, 0, p_thickness - p_outerHeight + p_lipHeight)
)
# compute centers for screw holes
topOfLidCenters = (
cutlip.faces(">Z")
.workplane(centerOption="CenterOfMass")
.rect(POSTWIDTH, POSTLENGTH, forConstruction=True)
.vertices()
)
# add holes of the desired type
if p_boreDiameter > 0 and p_boreDepth > 0:
topOfLid = topOfLidCenters.cboreHole(
p_screwpostID, p_boreDiameter, p_boreDepth, 2.0 * p_thickness
)
elif p_countersinkDiameter > 0 and p_countersinkAngle > 0:
topOfLid = topOfLidCenters.cskHole(
p_screwpostID, p_countersinkDiameter, p_countersinkAngle, 2.0 * p_thickness
)
else:
topOfLid = topOfLidCenters.hole(p_screwpostID, 2.0 * p_thickness)
# flip lid upside down if desired
if p_flipLid:
topOfLid = topOfLid.rotateAboutCenter((1, 0, 0), 180)
# return the combined result
result = topOfLid.union(bottom)