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Add inner sleeve knurling option

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Timothy Farrell 2019-12-30 12:55:22 -06:00
parent 6a10fa96ee
commit 38e29eb868
1 changed files with 38 additions and 2 deletions
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40
bushing.jscad
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@ -12,11 +12,43 @@ function getParameterDefinitions () {
{name: 'host_hole_height', type: 'float', initial: 0.8, caption: 'Host hole height'},
{name: 'bushing_height', type: 'float', initial: 4, min: 1, max: 40, step: 1, caption: 'Bushing height'},
{name: 'bushing_diameter', type: 'float', initial: 10, min: 1, max: 40, step: 1, caption: 'Bushing diameter'},
{name: 'taper', type: 'checkbox', checked: true, caption: 'Taper Edges?'}
{name: 'taper', type: 'checkbox', checked: true, caption: 'Taper Edges?'},
{name: 'knurling', type: 'checkbox', checked: false, caption: 'Add knurling?'}
];
}
function knurling(p) {
const knurls = [];
const bushing_radius = p.bushing_diameter / 2;
const thread_radius = bushing_radius * 0.72
const twist_angle = 45;
const overlap = 2;
const twist = twist_angle * p.bushing_height / thread_radius;
const threads = 360 / twist_angle * overlap;
const triangle = polygon([
[thread_radius, thread_radius],
[0, thread_radius],
[0, 0],
[thread_radius, 0]
]);
for (let i=0; i < threads; ++i) {
knurls.push(
linear_extrude({height: p.bushing_height, twist, slices: 30}, triangle)
.rotateZ(360 / threads * i)
.translate([0, 0, -p.bushing_height/2])
);
knurls.push(
linear_extrude({height: p.bushing_height, twist: -twist, slices: 30}, triangle)
.rotateZ(360 / threads * i)
.translate([0, 0, -p.bushing_height/2])
);
}
return union(...knurls);
}
function donut(p) {
const inner_radius = (p.bushing_height - p.host_hole_height) / 2;
const outer_radius = p.overhang + p.host_hole_diameter/2 - inner_radius;
@ -54,7 +86,11 @@ function host_hole(p) {
}
function bushing_sleeve(p) {
return cylinder({r: p.bushing_diameter/2, h: p.bushing_height, center: true});
const sleeve = cylinder({r: p.bushing_diameter/2, h: p.bushing_height, center: true});
if (p.knurling) {
return union(sleeve, knurling(p));
}
return sleeve;
}
function main(p) {