poster-tube-lid: convert to oring: introduce some difference/union (nfc)

[reprap-play.git] / poster-tube-lid.scad

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index eaa686d2c571b92811e5ad78e74614ff69ece82b..10eb6030c0c3a2d47af76b4df86499dda68a0319 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -1,6 +1,6 @@
 // -*- C -*-
 
-main_dia = 71.2 + 0.50;
+main_dia = 71.2 + 0.50 - 2.26;
 top_thick = 4;
 
 main_cnr = 4.0;
@@ -18,9 +18,14 @@ bayo_behind = 3.5;
 bayo_interf_width = 2.0;
 bayo_interf_slope = 0.75;
 
-seal_thick = 0.1;
 seal_recess = [ 2.0, 2.0 ]; // recess depth, recess height
 
+oring_thick = 5.0;
+oring_bore = 62.0;
+
+oring_upper_embed_angle = 45;
+oring_compress = 0.1; // proportion
+
 side_taper = 1.0;
 
 bayo_above_gap = 1.0;
@@ -29,6 +34,14 @@ bayo_entry = bayo_behind/3;
 
 bayo_slice_size = 1;
 
+brace_hole_width = 1.0;
+brace_above_below = 1.2;
+
+jig_thick = 1.4;
+jig_hole_dia = 3.0;
+jig_rim = 5;
+jig_mark = 5;
+
 // calculated
 
 bayo_entry_x = bayo_entry;
@@ -36,6 +49,12 @@ bayo_entry_z = bayo_entry;
 bayo_inramp_x = bayo_entry;
 bayo_inramp_z = bayo_entry;
 
+oring_mid_dia = oring_bore + oring_thick;
+oring_outer_dia = oring_mid_dia + oring_thick;
+
+seal_thick = (1 - oring_compress) * oring_thick/2
+  * (1 + cos(oring_upper_embed_angle));
+
 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 side_thick = rivet_tall + over_rivet_wall;
 
@@ -47,6 +66,8 @@ bayo_entry_ramp = bayo_entry + bayo_interf;
 
 rivet_entry_width = rivet_width + side_rivet_gap;
 
+jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
+
 $fs=0.5;
 $fa=1;
 
@@ -90,26 +111,31 @@ echo(bayo_polygon);
 
 module MainProfile(){
   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
-  translate(main_cnr_pos){
-    intersection(){
-      difference(){
-       circle(r = main_cnr);
-       circle(r = main_cnr * 0.5);
+  difference(){
+    union(){
+      translate(main_cnr_pos){
+       intersection(){
+         difference(){
+           circle(r = main_cnr);
+           circle(r = main_cnr * 0.5);
+         }
+         square([10,10]);
+       }
       }
-      square([10,10]);
+      polygon([[ -1,                    seal_thick        ],
+              [ -1,                    top_z             ],
+              [ main_cnr_pos[0],       top_z             ],
+              [ side_thick,            main_cnr_pos[1]   ],
+              [ side_thick,            -side_height      ],
+              [ side_taper,            -side_height      ],
+              [ 0,                     -rivet_posn       ],
+              [ 0,                     -(seal_recess[0] + seal_recess[1]) ],
+              [ seal_recess[0],        -(seal_recess[0]) ],
+              [ seal_recess[0],        seal_thick        ],
+              ],
+             convexity=10);
     }
   }
-  polygon([[ -1,                    seal_thick        ],
-          [ -1,                    top_z             ],
-          [ main_cnr_pos[0],       top_z             ],
-          [ side_thick,            main_cnr_pos[1]   ],
-          [ side_thick,            -side_height      ],
-          [ side_taper,            -side_height      ],
-          [ 0,                     -rivet_posn       ],
-          [ 0,                     -(seal_recess[0] + seal_recess[1]) ],
-          [ seal_recess[0],        -(seal_recess[0]) ],
-          [ seal_recess[0],        seal_thick        ],
-          ]);
 }
 
 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
@@ -145,13 +171,79 @@ module BayonetCutout(){
   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
                main_dia/2 + side_thick, 
                main_dia/2 + rivet_tall)
-    polygon(bayo_polygon);
+    polygon(bayo_polygon, convexity=10);
 }
 
-module ProfilesDemo(){
+module ProfilesDemo(){ ////toplevel
   translate([-20,0]) MainProfile();
-  polygon(bayo_polygon);
+  polygon(bayo_polygon, convexity=10);
+}
+
+module Cover(){ ////toplevel
+  render() difference(){
+    union(){
+      rotate_extrude(convexity=10)
+       translate([main_dia/2, 0])
+       MainProfile();
+      translate([0,0, seal_thick])
+       cylinder(h= top_thick, r = main_dia/2);
+    }
+    for (r=[0,180])
+      rotate([0,0, r])
+       translate([0,0, -side_height])
+       BayonetCutout();
+    for (r=[0 : 60 : 179]) {
+      rotate([0,0, r]) {
+       height = top_thick - brace_above_below*2;
+       translate([0,0, seal_thick + brace_above_below + height/2 ])
+       cube(center=true, [ main_dia, brace_hole_width, height ]);
+      }
+    }
+  }
+}
+
+module SavingHole(){
+  translate([0,0, -10])
+    cylinder(r= main_dia/2 - jig_rim, h=20);
+}
+
+module Jig(){ ////toplevel
+  difference(){
+    union(){
+      translate([0,0, -side_height]){
+       cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
+      }
+      translate([-jig_mark_rad, 0, jig_thick - jig_mark])
+       cube([jig_mark_rad*2, jig_mark, jig_mark]);
+    }
+    translate([0,0, -side_height-1])
+      cylinder(r= main_dia/2, h= side_height + 1);
+    SavingHole();
+    translate([0,0, -rivet_posn])
+      rotate([90, 0,0])
+      translate([0,0, -100])
+      cylinder(r= jig_hole_dia/2, h = 200);
+  }
+}
+
+module CoverTest2(){ ////toplevel
+  difference(){
+    Cover();
+    SavingHole();
+  }
+}
+
+module CoverTest1(){ ////toplevel
+  difference(){
+    CoverTest2();
+    translate([0,0, -10])
+      cube([ main_dia*3, main_dia * .85, 20], center=true);
+  }
 }
 
 //ProfilesDemo();
-BayonetCutout();
+//BayonetCutout();
+//MainProfile();
+//Cover();
+//Jig();
+//CoverTest();