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75 lines
2.3 KiB
OpenSCAD
75 lines
2.3 KiB
OpenSCAD
// Silencer for airguns Mk2. (C)2012 Vik Olliver, GPLv3 applies.
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// Designed to be held onto the barrel with a hose clamp.
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segment_height=17;
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silencer_rad=17;
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wallthickness=3.8;
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calibre=4.6;
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chamfer=1.2;
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segments=5;
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module silencer_segment() {
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difference () {
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union () {
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// Chamfered edge to make it look the part :)
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cylinder(h=chamfer, r2=silencer_rad, r1=silencer_rad-chamfer);
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translate ([0,0,chamfer]) cylinder(h=segment_height-2*chamfer, r=silencer_rad);
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// Chamfered edge to make it look the part :)
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translate ([0,0,segment_height-chamfer])
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cylinder(h=2, r1=silencer_rad, r2=silencer_rad-chamfer);
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}
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translate ([0,0,segment_height-(silencer_rad-wallthickness)-0.1])
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cylinder(h=silencer_rad-wallthickness+1,r1=silencer_rad-wallthickness,r2=calibre/2);
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translate ([0,0,-1]) cylinder(h=segment_height-(silencer_rad-wallthickness)+1,r=silencer_rad-wallthickness);
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// Add some more space for gas expansion.
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translate([0,0,segment_height-silencer_rad*0.07])
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difference () {
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cylinder(h=silencer_rad/2,r1=silencer_rad-wallthickness-1,r2=silencer_rad-wallthickness);
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translate ([0,0,-0.1]) cylinder(h=silencer_rad, r1=calibre/2+wallthickness/2+3,r2=calibre/2+wallthickness/2-3);
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}
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}
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}
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module cell_stack () {
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union () {
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for (i=[0:segments-1])
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translate ([0,0,segment_height*i]) silencer_segment();
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}
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}
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adaptor_len=31;
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clamp_len=14;
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barrel_dia=19;
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module silencer () {
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translate ([0,0,adaptor_len+(segment_height*segments)]) rotate([180,0,0]) difference () {
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union () {
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translate ([0,0,clamp_len])
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cylinder(h=adaptor_len-clamp_len, r1=barrel_dia/2+wallthickness, r2=silencer_rad);
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cylinder(h=clamp_len,r=barrel_dia/2+wallthickness);
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}
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translate ([0,0,-0.1]) {
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// Hole for barrel
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cylinder(h=adaptor_len+1,r=barrel_dia/2);
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// Taper to first chamber
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translate ([0,0,clamp_len+wallthickness/2])
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cylinder(h=adaptor_len-clamp_len+1,r1=barrel_dia/2,r2=silencer_rad-wallthickness);
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// Chamfer
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cylinder(h=1,r1=barrel_dia/2+1,r=barrel_dia/2);
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// Gaps for clamp compression
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cube([silencer_rad*2,1.5,clamp_len*2-2], center=true);
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}
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}
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cell_stack();
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// The exit hole
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difference () {
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cylinder(h=wallthickness,r=silencer_rad);
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translate ([0,0,-0.01]) cylinder(h=wallthickness+0.1,r1=calibre/2+wallthickness,r2=calibre/2);
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}
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}
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difference () {
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silencer();
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//cube([50,50,150]);
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}
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