hexagonal modular drawers

README.md

@@ -65,6 +65,11 @@ A place to share CadQuery scripts, modules, tutorials and projects
 
     <img src="examples/images/Thread.png" width="600"/>
 
+* [Hexagonal modular drawers](examples/hexagonal_drawers/assembly.py) - Inspired by [this on Prusa Printers](https://www.prusaprinters.org/prints/54113-hexagonal-organizer-system), these drawers are 3D printed (without needing supports) and clip together.
+
+    <img src="examples/hexagonal_drawers/hmd.png" width="600"/>
+    <img src="examples/hexagonal_drawers/hmd.jpg" width="600"/>
+
 ### Tutorials
 
 * [Ex000 Start Here.ipynb](tutorials/Ex000%20Start%20Here.ipynb) - iPython notebook that is the entry point for a set of CadQuery tutorials

examples/hexagonal_drawers/assembly.py

@@ -0,0 +1,74 @@
+"""
+Display the drawers
+"""
+
+import cadquery as cq
+import importlib
+import base
+import organiser_collets
+import organiser_3_125_bits
+importlib.reload(base)
+importlib.reload(organiser_collets)
+importlib.reload(organiser_3_125_bits)
+
+sep = 20  # seperation between parts
+big_sep = 100  # extra for the organisers
+
+assy = cq.Assembly()
+assy.add(base.frame, name="frame")
+assy.add(base.drawer, name="drawer")
+assy.add(organiser_collets.collet_organiser, name="collet organiser")
+assy.add(organiser_3_125_bits.bit_organiser, name="bit organiser")
+
+# pull the drawer out
+assy.constrain(
+    "frame",
+    base.frame.faces("<Y").val().translate((0, -sep, 0)),
+    "drawer",
+    base.drawer.faces(">Y").val(),
+    "Point",
+)
+
+# bit organiser aligns with back face of drawer and is big_sep above
+assy.constrain(
+    "drawer",
+    base.drawer.faces("<Y[1]").val().translate((0, 0, big_sep)),
+    "bit organiser",
+    organiser_3_125_bits.bit_organiser.faces(">Y").val(),
+    "Point",
+)
+assy.constrain(
+    "bit organiser",
+    organiser_3_125_bits.bit_organiser.faces("<Y").val().translate((0, -sep, 0)),
+    "collet organiser",
+    organiser_collets.collet_organiser.faces(">Y").val(),
+    "Point",
+)
+
+# align the z and x axes between obj0 and obj1
+align_these = (
+    ("frame", "drawer"),
+    ("drawer", "collet organiser"),
+    ("drawer", "bit organiser"),
+)
+for obj0, obj1 in align_these:
+    assy.constrain(
+        obj0,
+        cq.Face.makePlane(),
+        obj1,
+        cq.Face.makePlane(),
+        "Axis",
+        0,
+    )
+    assy.constrain(
+        obj0,
+        cq.Face.makePlane(dir=(1, 0, 0)),
+        obj1,
+        cq.Face.makePlane(dir=(1, 0, 0)),
+        "Axis",
+        0,
+    )
+
+assy.solve()
+if "show_object" in locals():
+    show_object(assy)

examples/hexagonal_drawers/base.py

@@ -0,0 +1,119 @@
+"""
+The basic frame and drawer.
+"""
+
+import cadquery as cq
+from types import SimpleNamespace
+from math import tan, radians
+
+hex_diam = 80  # outside of the drawer frame
+wall_thick = 3
+clearance = SimpleNamespace(tight=0.3)
+clearance.loose = clearance.tight * 2
+drawer_length = 150
+dovetail_min_thick = wall_thick * 2
+
+frame_y = drawer_length + clearance.loose + 2 * wall_thick
+
+frame = (
+    cq.Workplane("XZ")
+    .polygon(6, hex_diam)
+    .extrude(frame_y)
+    .faces("<Y")
+    .shell(-2 * wall_thick)
+)
+
+drawer = (
+    frame
+    .faces("<Y[1]")
+    .wires()
+    .translate((0, -clearance.loose, 0))
+    .toPending()
+    .offset2D(-clearance.loose)
+    .extrude(drawer_length, combine=False)
+    .faces(">Z or >>Z[-2]")
+    .shell(-wall_thick)
+)
+
+handle = (
+    drawer
+    .faces("<Y")
+    .edges("<Z")
+)
+handle_width = handle.val().Length()
+handle = (
+    handle
+    .workplane(centerOption="CenterOfMass")
+    .transformed(rotate=(-90, 0, 180))
+    .circle(handle_width / 2)
+    .circle(handle_width / 2 - wall_thick)
+    .transformed(rotate=(30, 0, 0))
+    .extrude(hex_diam / 2, combine=False)
+    .newObject([drawer.faces("<Y").val()])
+    .workplane(centerOption="CenterOfMass")
+    .split(keepTop=True)
+)
+
+drawer = drawer.union(handle)
+del handle
+
+top_length = frame.faces(">Z").val().BoundingBox().ylen
+dovetail_base_radius = frame.faces("<Y").edges(">Z").val().Center().z
+dovetail_length = 0.9 * top_length
+
+# make the male dovetail join
+# should extend wall_thick out from the frame
+dovetail_positive = (
+    cq.Workplane()
+    .hLine(dovetail_min_thick / 2)
+    .line(wall_thick * tan(radians(30)), wall_thick)
+    .hLineTo(0)
+    .mirrorY()
+    .extrude(-dovetail_length)
+    .faces("<Z")
+    .edges("<Y")
+    .workplane()
+    .transformed(rotate=(60, 0, 0))
+    .split(keepBottom=True)
+)
+# provide some clearance around the straight section, but leave the sloped
+# plane at the back alone so it mates as a backstop
+# dovetail_straight_length = dovetail_positive.edges(">Y and |Z").val().Length()
+dovetail_negative = (
+    dovetail_positive
+    .tag("dovetail_positive")
+    .faces(">Z")
+    .wires()
+    .toPending()
+    .offset2D(clearance.tight)
+    .faces(">Z", tag="dovetail_positive")
+    .workplane()
+    .extrude(-(dovetail_length + clearance.tight))
+    .faces("<Z")
+    .edges("<Y")
+    .workplane()
+    .transformed(rotate=(60, 0, 0))
+    .split(keepBottom=True)
+    .mirror("XZ")
+)
+dovetail_baseplane = (
+    frame
+    .faces("<Y")
+    .workplane(centerOption="CenterOfMass")
+)
+dovetail_positive = (
+    dovetail_baseplane
+    .polarArray(dovetail_base_radius, startAngle=-60, angle=120, count=3)
+    .eachpoint(lambda loc: dovetail_positive.val().located(loc), useLocalCoordinates=True)
+)
+
+dovetail_negative = (
+    dovetail_baseplane
+    .polarArray(dovetail_base_radius, startAngle=120, angle=120, count=3)
+    .eachpoint(lambda loc: dovetail_negative.val().located(loc), useLocalCoordinates=True)
+)
+frame = frame.union(dovetail_positive, glue=True).cut(dovetail_negative)
+
+if "show_object" in locals():
+    show_object(frame, "frame", options={"alpha": 0.5, "color": "black"})
+    show_object(drawer, "drawer", options={"color": "green"})

examples/hexagonal_drawers/organiser_3_125_bits.py

@@ -0,0 +1,44 @@
+"""
+Organiser for cutters with a shank of 3.125mm
+"""
+
+import cadquery as cq
+import importlib
+import base
+import organiser_blank
+importlib.reload(organiser_blank)
+
+base_wp = (
+    organiser_blank.organiser
+    .faces(">Z")
+    .workplane(centerOption="CenterOfMass")
+)
+
+bit_3_125_points = (
+    base_wp
+    .rarray(
+        3.125 * 3,
+        3.125 * 4,
+        4,
+        4,
+    )
+    .vals()
+)
+bit_3_125_points.extend(
+    base_wp
+    .rarray(
+        3.125 * 3,
+        3.125 * 4,
+        3,
+        3,
+    )
+    .vals()
+)
+bit_organiser = (
+    base_wp
+    .newObject(bit_3_125_points)
+    .hole(
+        3.125 + 2 * base.clearance.loose,
+        depth=organiser_blank.organiser.val().BoundingBox().zlen - 1.5 * base.wall_thick,
+    )
+)

examples/hexagonal_drawers/organiser_blank.py

@@ -0,0 +1,37 @@
+"""
+An organiser that takes up 1/3 of a drawer and has no cutouts yet.
+"""
+
+import cadquery as cq
+import importlib
+import base
+importlib.reload(base)
+
+
+# organiser base
+# first grab the inner profile of the drawer
+lines = (
+    base.drawer
+    .faces(">Y")
+    .workplane(offset=-base.drawer_length / 2)
+    .section()
+    .edges()
+    .vals()
+)
+assert len(lines) == 8
+# sort lines by radius about y axis
+lines.sort(
+    key=lambda x: cq.Vector(x.Center().x, 0, x.Center().z).Center().Length
+)
+wire = cq.Wire.assembleEdges(lines[0:3])
+wire = cq.Wire.combine(
+    [wire, cq.Edge.makeLine(wire.endPoint(), wire.startPoint())]
+)[0]
+wire_center = wire.Center()
+wire = wire.translate(cq.Vector(0, -wire_center.y, 0))
+organiser = (
+    cq.Workplane("XZ")
+    .newObject([wire])
+    .toPending()
+    .extrude(base.drawer_length / 3 - base.clearance.loose)
+)

examples/hexagonal_drawers/organiser_collets.py

@@ -0,0 +1,61 @@
+"""
+An organiser with holes for ER11 collets.
+"""
+
+import cadquery as cq
+from types import SimpleNamespace
+import importlib
+import organiser_blank
+importlib.reload(organiser_blank)
+
+
+collet_dims = SimpleNamespace(
+    upper_diam=11.35,
+    cone_height=13.55,
+    lower_diam=7.8,
+)
+collet = (
+    cq.Solid.makeCone(
+        collet_dims.upper_diam / 2,
+        collet_dims.lower_diam / 2,
+        collet_dims.cone_height,
+    )
+    .mirror("XY")
+    .translate(cq.Vector(0, 0, collet_dims.cone_height / 3))
+)
+collet_organiser_points = (
+    organiser_blank.organiser
+    .faces(">Z")
+    .workplane(centerOption="CenterOfMass")
+    .rarray(
+        collet_dims.upper_diam * 1.5,
+        collet_dims.upper_diam * 2.3,
+        3,
+        2,
+    )
+    .vals()
+)
+collet_organiser_points.extend(
+    organiser_blank.organiser
+    .faces(">Z")
+    .workplane(centerOption="CenterOfMass")
+    .rarray(
+        collet_dims.upper_diam * 1.5,
+        collet_dims.upper_diam * 2.3,
+        2,
+        1,
+    )
+    .vals()
+)
+collets = (
+    cq.Workplane()
+    .pushPoints(collet_organiser_points)
+    .eachpoint(lambda loc: collet.located(loc))
+)
+collet_organiser = (
+    organiser_blank.organiser
+    .cut(collets)
+)
+
+if "show_object" in locals():
+    show_object(collet_organiser, "collet organiser")