Adding new TTT part 24-SPO-06-Buffer Stand

docs/assets/ttt/ttt-24-SPO-06-Buffer_Stand.py

@@ -0,0 +1,50 @@
+from build123d import *
+from ocp_vscode import show
+
+with BuildPart() as p:
+    with BuildSketch() as xy:
+        with BuildLine():
+            l1 = ThreePointArc((5 / 2, -1.25), (5.5 / 2, 0), (5 / 2, 1.25))
+            Polyline(l1 @ 0, (0, -1.25), (0, 1.25), l1 @ 1)
+        make_face()
+    extrude(amount=4)
+
+    with BuildSketch(Plane.YZ) as yz:
+        Trapezoid(2.5, 4, 90 - 6, align=(Align.CENTER, Align.MIN))
+        _, arc_center, arc_radius = full_round(yz.edges().sort_by(SortBy.LENGTH)[0])
+    extrude(amount=10, mode=Mode.INTERSECT)
+
+    # To avoid OCCT problems, don't attempt to extend the top arc, remove instead
+    with BuildPart(mode=Mode.SUBTRACT) as internals:
+        y = p.edges().filter_by(Axis.X).sort_by(Axis.Z)[-1].center().Z
+
+        with BuildSketch(Plane.YZ.offset(4.25 / 2)) as yz:
+            Trapezoid(2.5, y, 90 - 6, align=(Align.CENTER, Align.MIN))
+            with Locations(arc_center):
+                Circle(arc_radius, mode=Mode.SUBTRACT)
+        extrude(amount=-(4.25 - 3.5) / 2)
+
+        with BuildSketch(Plane.YZ.offset(3.5 / 2)) as yz:
+            Trapezoid(2.5, 4, 90 - 6, align=(Align.CENTER, Align.MIN))
+        extrude(amount=-3.5 / 2)
+
+        with BuildSketch(Plane.XZ.offset(-2)) as xz:
+            with Locations((0, 4)):
+                RectangleRounded(4.25, 7.5, 0.5)
+        extrude(amount=4, mode=Mode.INTERSECT)
+
+    with Locations(p.faces(Select.LAST).filter_by(GeomType.PLANE).sort_by(Axis.Z)[-1]):
+        CounterBoreHole(0.625 / 2, 1.25 / 2, 0.5)
+
+    with BuildSketch(Plane.YZ) as rib:
+        with Locations((0, 0.25)):
+            Trapezoid(0.5, 1, 90 - 8, align=(Align.CENTER, Align.MIN))
+        full_round(rib.edges().sort_by(SortBy.LENGTH)[0])
+    extrude(amount=4.25 / 2)
+
+    mirror(about=Plane.YZ)
+
+part = scale(p.part, IN)
+print(f"\npart weight = {part.volume*7800e-6/LB:0.2f} lbs")
+
+show(p)

docs/operations.rst

@@ -34,7 +34,7 @@ BuildPart and Algebra Part.
 +----------------------------------------------+------------------------------------+----+----+----+----+------------------------+
 | :func:`~operations_generic.fillet`           | Radius Vertex or Edge              |    |    | ✓  | ✓  | :ref:`9 <ex 9>`        |
 +----------------------------------------------+------------------------------------+----+----+----+----+------------------------+
-| :func:`~operations_sketch.full_round`        | Round-off Face along given Edge    |    |    | ✓  |    |                        |
+| :func:`~operations_sketch.full_round`        | Round-off Face along given Edge    |    |    | ✓  |    | :ref:`ttt-24-spo-06`   |
 +----------------------------------------------+------------------------------------+----+----+----+----+------------------------+
 | :func:`~operations_part.loft`                | Create 3D Shape from sections      |    |    |    | ✓  | :ref:`24 <ex 24>`      |
 +----------------------------------------------+------------------------------------+----+----+----+----+------------------------+

docs/tttt.rst

@@ -73,6 +73,11 @@ Feel free to click on the parts below to embark on these engaging challenges.
         :link: ttt-23-t-24
         :link-type: ref
 
+    .. grid-item-card:: 24-SPO-06 Buffer Stand
+        :img-top: assets/ttt/ttt-24-SPO-06-Buffer_Stand_object.png
+        :link: ttt-24-spo-06
+        :link-type: ref
+
 
 .. _ttt-ppp0101:
 
@@ -240,3 +245,20 @@ Party Pack 01-10 Light Cap
 .. dropdown:: Reference Implementation
 
     .. literalinclude:: assets/ttt/ttt-23-t-24-curved_support.py
+
+
+.. _ttt-24-spo-06:
+
+24-SPO-06 Buffer Stand
+----------------------
+
+.. image:: assets/ttt/ttt-24-SPO-06-Buffer_Stand_object.png
+  :align: center
+
+.. dropdown:: Object Mass
+
+    3.92 lbs
+
+.. dropdown:: Reference Implementation
+
+    .. literalinclude:: assets/ttt/ttt-24-SPO-06-Buffer_Stand.py