X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=poster-tube-lid.scad;h=d6cd360ddc1c60e3f8709065fa8ce3370703e997;hp=86c14833e2145182b73200685f1b4bad1e9c9de6;hb=3a48bcb0bb3b3b9192d0b9850312d911113b02da;hpb=b00550ff3ba85f3d372c816f65e5c4f385bea1da diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index 86c1483..d6cd360 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -1,33 +1,61 @@ // -*- C -*- -main_dia = 71.2 + 0.50; -top_thick = 4; +coarse = false; -main_cnr = 4.0; +main_dia = 71.2 + 0.50 - 2.26; +top_thick_middle = 4; +top_thick_by_oring = 3.0; +top_middle_dr = 11; -rivet_posn = 6.0; +main_cnr = 6.0; + +min_wall = 3; + +rivet_posn = 6.0 + 0.6; rivet_thick = 1.67; rivet_width = 4.15 + 1.0; -rivet_tall = 5.51 + 0.49; +rivet_tall = 5.51 + 1.49; -over_rivet_wall = 0.5; +over_rivet_wall = 1.0; side_rivet_gap = 1.5; +inside_rivet_gap = 1.5; -bayo_interf = 0.75; +bayo_interf = 0.85; bayo_behind = 3.5; bayo_interf_width = 2.0; -bayo_interf_slope = 0.75; +bayo_interf_slope = 0.5; + +oring_thick = 5.0; +oring_bore = 62.0; + +oring_upper_embed_angle = 80; +oring_compress = 0.1; // proportion -seal_thick = 0.1; -seal_recess = [ 2.0, 2.0 ]; // recess depth, recess height +oring_rm_beside = 8; +oring_rm_scale = 2.0; +oring_rm_angle = 20; side_taper = 1.0; -bayo_above_gap = 1.0; +bayo_gap = 6.0; bayo_entry = bayo_behind/3; -bayo_slice_size = 1; +bayo_slice_size = coarse ? 5 : 1; + +brace_hole_width = 1.0; +brace_above_below = 1.2; +brace_end_shorter = 0.3; + +jig_thick = 1.4; +jig_hole_dia = 3.0; +jig_rim = 5; +jig_mark = 5; + +strap_hoop_thick = 6; +strap_hoop_inside = 10; +strap_hoop_strlen = 10; +strap_hoop_elevation = 45; // calculated @@ -36,19 +64,35 @@ 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; + +oring_oblate = (1 - oring_compress); + +oring_y_rad = oring_thick/2 * oring_oblate; +oring_x_rad = oring_thick/2 / oring_oblate; + +by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle)); + side_height = rivet_posn + bayo_behind + rivet_thick/2; side_thick = rivet_tall + over_rivet_wall; -top_z = top_thick + seal_thick; +top_z = top_thick_by_oring + oring_y_rad + by_oring_z; + +middle_bot_z = top_z - top_thick_middle; bayo_entry = bayo_behind / 3.0; -bayo_top_z = bayo_behind + rivet_thick + bayo_above_gap; -bayo_entry_ramp = bayo_entry + bayo_interf; +bayo_top_z = bayo_behind + bayo_gap; rivet_entry_width = rivet_width + side_rivet_gap; -$fs=0.5; -$fa=1; +jig_mark_rad = jig_mark + main_dia/2 + jig_thick; + +handling_dia = oring_bore + oring_thick*2 + min_wall*2; +handling_angle = 45; + +$fs= coarse ? 2.5 : 0.5; +$fa= coarse ? 5 : 1; // bayonet definition @@ -59,8 +103,8 @@ bayo_m = [ bayo_inramp_x, bayo_behind ]; bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope, 1 ]; bayo_k = bayo_l + [ bayo_interf_width, 0 ]; bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ]; -bayo_i = bayo_j + [ rivet_width, 0 ]; -bayo_h = [ bayo_i[0], bayo_behind + rivet_thick + bayo_above_gap ]; +bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ]; +bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ]; bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ]; bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0]; @@ -90,36 +134,84 @@ 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]); + } + } + polygon([[ -top_middle_dr, middle_bot_z ], + [ -top_middle_dr, 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, by_oring_z ], + [ -oring_x_rad, by_oring_z ], + ], + convexity=10); + } + translate([ oring_mid_dia/2 - main_dia/2, 0 ]) + hull(){ + translate([ 0, oring_y_rad ]) + scale([ 1/oring_oblate, oring_oblate ]) + circle(oring_thick/2); + translate([ 0, oring_y_rad*2 - oring_thick/2 ]) + circle(oring_thick/2); + } + } +} + +module StrapHoopProfile(){ + circle(r = strap_hoop_thick/2); +} + +module StrapHoop(){ ////toplevel + bigrad = strap_hoop_inside/2 + strap_hoop_thick/2; + extralen = strap_hoop_thick * 5; + + intersection(){ + rotate([strap_hoop_elevation, 0,0]){ + for (x= [ -1, +1 ] * bigrad) { + translate([x, -extralen, 0]) + rotate([-90,0,0]) + linear_extrude(height= extralen + strap_hoop_strlen + 0.1, + convexity=10) + StrapHoopProfile(); + } + translate([0, strap_hoop_strlen, 0]){ + intersection(){ + rotate_extrude(convexity=10) + translate([bigrad, 0,0]) + StrapHoopProfile(); + translate([0,50,0]) + cube([100,100,100], center=true); + } } - square([10,10]); } + translate([0, 50, 0]) + cube(100, center=true); } - 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, poly, slice_size, nom_rad, real_rad){ +module HandlingProfile(){ +// translate([ +} + +module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){ // nom_rad > real_rad rotate([0,0, atan2(offset, nom_rad) ]){ intersection(){ translate([-offset, -10, 0]) rotate([90,0,0]) linear_extrude(height= nom_rad*2) - polygon(poly); + children(0); translate([0,0, -25]) cylinder(h=50, r= real_rad); translate([0,0, -25]) @@ -131,26 +223,148 @@ module RotateProjectSlice(offset, poly, slice_size, nom_rad, real_rad){ } } -module RotateProject(poly, x_min, x_max, slice_size, nom_rad, real_rad){ +module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){ offs = [ for (i=[ x_min : slice_size : x_max + slice_size ]) i ]; echo (offs); for (off=offs) - RotateProjectSlice(off, poly, slice_size, nom_rad, real_rad); + RotateProjectSlice(off, slice_size, nom_rad, real_rad) + children(0); } module BayonetCutout(){ - RotateProject(bayo_polygon, - bayo_c[0], bayo_i[0], bayo_slice_size, + RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size, main_dia/2 + side_thick, - main_dia/2 + rivet_tall); + main_dia/2 + rivet_tall) + translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0]) + polygon(bayo_polygon, convexity=10); +} + +module ProfilesDemo(){ ////toplevel + translate([-10,0]) MainProfile(); + translate([+10, -side_height]) polygon(bayo_polygon, convexity=10); +} + +module LimitForHandling(){ ////toplevel + hull() for (r=[0,180]) + rotate([0,0,r]) { + for (rs=[-1,+1]) { + for (xd=[0,1]) { + rotate([0,0, rs * handling_angle/2]) { + translate([rs * xd * main_dia/2 * tan(handling_angle/2), + main_dia/2 + side_thick - main_cnr, + top_z - main_cnr]) { + mirror([0,0,1]) + cylinder(r= main_cnr, h=50); + sphere(main_cnr); + } + } + } + } + } + hull() rotate_extrude(){ + translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) { + circle(r = main_cnr); + mirror([0,1]) square([ main_cnr, 50 ]); + } + } + //cylinder(r= handling_dia/2, h=20); +} + +module Cover(){ ////toplevel + render() difference(){ + intersection(){ + union(){ + rotate_extrude(convexity=10) + translate([main_dia/2, 0]) + MainProfile(); + translate([0,0, middle_bot_z]) + cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1); + } + LimitForHandling(); + } + for (r=[0,180]){ + rotate([0,0, r]) + translate([0,0, -side_height]) + BayonetCutout(); + rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))]) + translate([0, + oring_mid_dia/2 + oring_thick/4 * oring_rm_scale, + oring_y_rad * 1.5]) + rotate([-oring_rm_angle, 0, 0]) + mirror([0,0,1]) + cylinder(r = oring_thick/4 * oring_rm_scale, h=20); + } + for (r=[0 : 60 : 179]) { + rotate([0,0, r]) { + height = top_thick_middle - brace_above_below*2; + translate([0,0, middle_bot_z + brace_above_below + height/2 ]) + cube(center=true, [ oring_bore - brace_end_shorter, + brace_hole_width, height ]); + } + } + } + translate(strap_hoop_thick * [-0.5, 0, +1]) + translate([handling_dia/2, 0, -side_height]) + rotate([0,180,0]) rotate([0,0,90]) + StrapHoop(); +} + +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 ProfilesDemo(){ - translate([-20,0]) MainProfile(); - polygon(bayo_polygon); +module CoverTest1(){ ////toplevel + difference(){ + CoverTest2(); + difference(){ + for (r= [ 40, 147 ]){ + rotate([0,0, r]){ + translate([0,0, -10]) { + cube([ main_dia*3, main_dia * .55, 18], center=true); + } + } + } + translate([ 50, 0, 0 ]) + cube([ 100, + strap_hoop_inside + strap_hoop_thick*2 + 1, + 100 ], + center=true); + } + } } //ProfilesDemo(); -BayonetCutout(); +//BayonetCutout(); +//MainProfile(); +//Cover(); +//Jig(); +//CoverTest();