mirror of
https://github.com/BelfrySCAD/BOSL2.git
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587 lines
14 KiB
OpenSCAD
587 lines
14 KiB
OpenSCAD
//////////////////////////////////////////////////////////////////////
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// Screws, Bolts, and Nuts.
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//////////////////////////////////////////////////////////////////////
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/*
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BSD 2-Clause License
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Copyright (c) 2017, Revar Desmera
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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use <transforms.scad>
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use <shapes.scad>
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use <threading.scad>
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use <phillips_drive.scad>
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use <math.scad>
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function get_metric_bolt_head_size(size) = lookup(size, [
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[ 3.0, 5.5],
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[ 4.0, 7.0],
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[ 5.0, 8.0],
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[ 6.0, 10.0],
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[ 7.0, 11.0],
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[ 8.0, 13.0],
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[10.0, 17.0],
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[12.0, 19.0],
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[14.0, 22.0],
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[16.0, 24.0],
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[18.0, 27.0],
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[20.0, 30.0],
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[24.0, 36.0],
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[30.0, 46.0],
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[36.0, 55.0],
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[42.0, 65.0],
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[48.0, 75.0],
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[56.0, 85.0],
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[64.0, 95.0]
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]);
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function get_metric_bolt_head_height(size) = lookup(size, [
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[ 1.6, 1.23],
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[ 2.0, 1.53],
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[ 2.5, 1.83],
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[ 3.0, 2.13],
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[ 4.0, 2.93],
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[ 5.0, 3.65],
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[ 6.0, 4.15],
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[ 8.0, 5.45],
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[10.0, 6.58],
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[12.0, 7.68],
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[14.0, 8.98],
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[16.0, 10.18],
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[20.0, 12.72],
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[24.0, 15.35],
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[30.0, 19.12],
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[36.0, 22.92],
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[42.0, 26.42],
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[48.0, 30.42],
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[56.0, 35.50],
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[64.0, 40.50]
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]);
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function get_metric_socket_cap_diam(size) = lookup(size, [
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[ 1.6, 3.0],
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[ 2.0, 3.8],
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[ 2.5, 4.5],
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[ 3.0, 5.5],
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[ 4.0, 7.0],
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[ 5.0, 8.5],
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[ 6.0, 10.0],
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[ 8.0, 13.0],
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[10.0, 16.0],
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[12.0, 18.0],
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[14.0, 21.0],
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[16.0, 24.0],
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[18.0, 27.0],
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[20.0, 30.0],
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[22.0, 33.0],
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[24.0, 36.0],
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[27.0, 40.0],
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[30.0, 45.0],
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[33.0, 50.0],
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[36.0, 54.0],
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[42.0, 63.0],
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[48.0, 72.0],
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[56.0, 84.0],
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[64.0, 96.0]
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]);
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function get_metric_socket_cap_height(size) = lookup(size, [
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[ 1.6, 1.7],
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[ 2.0, 2.0],
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[ 2.5, 2.5],
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[ 3.0, 3.0],
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[ 4.0, 4.0],
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[ 5.0, 5.0],
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[ 6.0, 6.0],
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[ 8.0, 8.0],
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[10.0, 10.0],
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[12.0, 12.0],
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[14.0, 14.0],
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[16.0, 16.0],
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[18.0, 18.0],
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[20.0, 20.0],
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[22.0, 22.0],
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[24.0, 24.0],
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[27.0, 27.0],
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[30.0, 30.0],
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[33.0, 33.0],
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[36.0, 36.0],
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[42.0, 42.0],
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[48.0, 48.0],
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[56.0, 56.0],
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[64.0, 64.0]
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]);
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function get_metric_socket_cap_socket_size(size) = lookup(size, [
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[ 1.6, 1.5],
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[ 2.0, 1.5],
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[ 2.5, 2.0],
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[ 3.0, 2.5],
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[ 4.0, 3.0],
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[ 5.0, 4.0],
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[ 6.0, 5.0],
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[ 8.0, 6.0],
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[10.0, 8.0],
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[12.0, 10.0],
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[14.0, 12.0],
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[16.0, 14.0],
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[18.0, 14.0],
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[20.0, 17.0],
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[22.0, 17.0],
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[24.0, 19.0],
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[27.0, 19.0],
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[30.0, 22.0],
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[33.0, 24.0],
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[36.0, 27.0],
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[42.0, 32.0],
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[48.0, 36.0],
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[56.0, 41.0],
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[64.0, 46.0]
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]);
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function get_metric_socket_cap_socket_depth(size) = lookup(size, [
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[ 1.6, 0.7],
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[ 2.0, 1.0],
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[ 2.5, 1.1],
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[ 3.0, 1.3],
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[ 4.0, 2.0],
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[ 5.0, 2.5],
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[ 6.0, 3.0],
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[ 8.0, 4.0],
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[10.0, 5.0],
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[12.0, 6.0],
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[14.0, 7.0],
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[16.0, 8.0],
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[18.0, 9.0],
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[20.0, 10.0],
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[22.0, 11.0],
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[24.0, 12.0],
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[27.0, 13.5],
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[30.0, 15.5],
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[33.0, 18.0],
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[36.0, 19.0],
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[42.0, 24.0],
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[48.0, 28.0],
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[56.0, 34.0],
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[64.0, 38.0]
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]);
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function get_metric_iso_coarse_thread_pitch(size) = lookup(size, [
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[ 1.6, 0.35],
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[ 2.0, 0.40],
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[ 2.5, 0.45],
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[ 3.0, 0.50],
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[ 4.0, 0.70],
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[ 5.0, 0.80],
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[ 6.0, 1.00],
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[ 7.0, 1.00],
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[ 8.0, 1.25],
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[10.0, 1.50],
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[12.0, 1.75],
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[14.0, 2.00],
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[16.0, 2.00],
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[18.0, 2.50],
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[20.0, 2.50],
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[22.0, 2.50],
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[24.0, 3.00],
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[27.0, 3.00],
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[30.0, 3.50],
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[33.0, 3.50],
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[36.0, 4.00],
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[39.0, 4.00],
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[42.0, 4.50],
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[45.0, 4.50],
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[48.0, 5.00],
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[56.0, 5.50],
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[64.0, 6.00]
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]);
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function get_metric_iso_fine_thread_pitch(size) = lookup(size, [
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[ 1.6, 0.35],
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[ 2.0, 0.40],
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[ 2.5, 0.45],
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[ 3.0, 0.50],
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[ 4.0, 0.70],
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[ 5.0, 0.80],
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[ 6.0, 1.00],
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[ 7.0, 1.00],
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[ 8.0, 1.00],
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[10.0, 1.25],
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[12.0, 1.50],
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[14.0, 1.50],
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[16.0, 2.00],
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[18.0, 2.50],
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[20.0, 2.50],
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[22.0, 2.50],
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[24.0, 3.00],
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[27.0, 3.00],
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[30.0, 3.50],
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[33.0, 3.50],
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[36.0, 4.00],
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[39.0, 4.00],
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[42.0, 4.50],
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[45.0, 4.50],
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[48.0, 5.00],
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[56.0, 5.50],
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[64.0, 6.00]
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]);
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function get_metric_iso_superfine_thread_pitch(size) = lookup(size, [
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[ 1.6, 0.35],
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[ 2.0, 0.40],
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[ 2.5, 0.45],
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[ 3.0, 0.50],
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[ 4.0, 0.70],
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[ 5.0, 0.80],
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[ 6.0, 1.00],
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[ 7.0, 1.00],
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[ 8.0, 1.00],
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[10.0, 1.00],
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[12.0, 1.25],
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[14.0, 1.50],
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[16.0, 2.00],
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[18.0, 2.50],
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[20.0, 2.50],
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[22.0, 2.50],
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[24.0, 3.00],
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[27.0, 3.00],
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[30.0, 3.50],
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[33.0, 3.50],
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[36.0, 4.00],
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[39.0, 4.00],
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[42.0, 4.50],
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[45.0, 4.50],
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[48.0, 5.00],
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[56.0, 5.50],
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[64.0, 6.00]
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]);
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function get_metric_jis_thread_pitch(size) = lookup(size, [
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[ 2.0, 0.40],
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[ 2.5, 0.45],
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[ 3.0, 0.50],
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[ 4.0, 0.70],
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[ 5.0, 0.80],
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[ 6.0, 1.00],
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[ 7.0, 1.00],
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[ 8.0, 1.25],
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[10.0, 1.25],
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[12.0, 1.25],
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[14.0, 1.50],
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[16.0, 1.50],
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[18.0, 1.50],
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[20.0, 1.50]
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]);
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function get_metric_nut_size(size) = lookup(size, [
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[ 2.0, 4.0],
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[ 2.5, 5.0],
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[ 3.0, 5.5],
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[ 4.0, 7.0],
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[ 5.0, 8.0],
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[ 6.0, 10.0],
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[ 7.0, 11.0],
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[ 8.0, 13.0],
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[10.0, 17.0],
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[12.0, 19.0],
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[14.0, 22.0],
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[16.0, 24.0],
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[18.0, 27.0],
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[20.0, 30.0]
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]);
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function get_metric_nut_thickness(size) = lookup(size, [
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[ 1.6, 1.3],
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[ 2.0, 1.6],
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[ 2.5, 2.0],
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[ 3.0, 2.4],
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[ 4.0, 3.2],
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[ 5.0, 4.0],
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[ 6.0, 5.0],
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[ 7.0, 5.5],
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[ 8.0, 6.5],
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[10.0, 8.0],
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[12.0, 10.0],
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[14.0, 11.0],
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[16.0, 13.0],
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[18.0, 15.0],
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[20.0, 16.0],
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[24.0, 21.5],
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[30.0, 25.6],
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[36.0, 31.0],
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[42.0, 34.0],
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[48.0, 38.0],
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[56.0, 45.0],
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[64.0, 51.0]
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]);
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// Makes a very simple screw model, useful for making screwholes.
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// screwsize = diameter of threaded part of screw.
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// screwlen = length of threaded part of screw.
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// headsize = diameter of the screw head.
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// headlen = length of the screw head.
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// countersunk = If true, center from cap's top instead of it's bottom.
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// Example:
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// screw(screwsize=3,screwlen=10,headsize=6,headlen=3,countersunk=true);
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module screw(
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screwsize=3,
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screwlen=10,
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headsize=6,
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headlen=3,
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pitch=undef,
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countersunk=false
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) {
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sides = max(12, segs(screwsize/2));
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down(countersunk? headlen-0.01 : 0) {
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down(screwlen/2) {
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if (pitch == undef) {
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cylinder(r=screwsize/2, h=screwlen+0.05, center=true, $fn=sides);
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} else {
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threaded_rod(d=screwsize, l=screwlen+0.05, pitch=pitch, $fn=sides);
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}
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}
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up(headlen/2) cylinder(r=headsize/2, h=headlen, center=true, $fn=sides*2);
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}
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}
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// Makes a standard metric screw model.
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// size = diameter of threaded part of screw.
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// headtype = One of "hex", "pan", "button", "round", "countersunk", "oval", "socket". Default: "socket"
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// l = length of screw, except for the head.
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// shank = Length of unthreaded portion of the shaft.
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// pitch = If given, render threads of the given pitch. If 0, then no threads. Overrides coarse argument.
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// details = If true model should be rendered with extra details. (Default: false)
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// coarse = If true, make coarse threads instead of fine threads. Default = true
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// flange = radius of flange beyond the head. Default = 0 (no flange)
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// phillips = If given, the size of the phillips drive hole to add. (ie: "#1", "#2", or "#3")
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// Examples:
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// metric_bolt(headtype="pan", size=10, l=15, details=true, phillips="#2");
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// metric_bolt(headtype="countersunk", size=10, l=15, details=true, phillips="#2");
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// metric_bolt(headtype="socket", size=10, l=15, flange=4, coarse=false, shank=5, details=true);
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// metric_bolt(headtype="hex", size=10, l=15, flange=4, coarse=false, shank=5, details=true, phillips="#2");
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module metric_bolt(
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headtype="socket",
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size=3,
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l=12,
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shank=0,
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pitch=undef,
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details=false,
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coarse=true,
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phillips=undef,
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flange=0
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) {
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D = headtype != "hex"?
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get_metric_socket_cap_diam(size) :
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get_metric_bolt_head_size(size);
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H = headtype == "socket"?
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get_metric_socket_cap_height(size) :
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get_metric_bolt_head_height(size);
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P = coarse?
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(pitch==undef? get_metric_iso_coarse_thread_pitch(size) : pitch) :
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(pitch==undef? get_metric_iso_fine_thread_pitch(size) : pitch);
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tlen = l - min(l, shank);
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sides = max(12, segs(size/2));
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tcirc = D/cos(30);
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bevtop = (tcirc-D)/2;
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bevbot = P/2;
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color("silver")
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down(headtype == "countersunk" || headtype == "oval"? (D-size)/2 : 0) {
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difference() {
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union() {
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// Head
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if (headtype == "hex") {
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difference() {
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cylinder(d=tcirc, h=H, center=false, $fn=6);
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// Bevel hex nut top
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if (details) {
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up(H-bevtop) {
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difference() {
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upcube([tcirc+1, tcirc+1, bevtop+0.5]);
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down(0.01) cylinder(d1=tcirc, d2=tcirc-bevtop*2, h=bevtop+0.02, center=false);
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}
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}
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}
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}
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} else if (headtype == "socket") {
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sockw = get_metric_socket_cap_socket_size(size);
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sockd = get_metric_socket_cap_socket_depth(size);
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difference() {
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cylinder(d=D, h=H, center=false);
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up(H-sockd) cylinder(h=sockd+0.1, d=sockw/cos(30), center=false, $fn=6);
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if (details) {
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kcnt = 36;
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zring(n=kcnt, r=D/2) up(H/3) upcube([PI*D/kcnt/2, PI*D/kcnt/2, H]);
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}
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}
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} else if (headtype == "pan") {
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top_half() rcylinder(h=H*0.75*2, d=D, fillet=H/2, center=true);
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} else if (headtype == "round") {
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top_half() zscale(H*0.75/D*2) sphere(d=D);
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} else if (headtype == "button") {
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up(H*0.75/3) top_half() zscale(H*0.75*2/3/D*2) sphere(d=D);
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cylinder(d=D, h=H*0.75/3+0.01, center=false);
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} else if (headtype == "countersunk") {
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cylinder(h=(D-size)/2, d1=size, d2=D, center=false);
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} else if (headtype == "oval") {
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up((D-size)/2) top_half() zscale(0.333) sphere(d=D);
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cylinder(h=(D-size)/2, d1=size, d2=D, center=false);
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}
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// Flange
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if (flange>0) {
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up(headtype == "countersunk" || headtype == "oval"? (D-size)/2 : 0) {
|
|
cylinder(d=D+flange, h=H/8, center=false);
|
|
up(H/8) cylinder(d1=D+flange, d2=D, h=H/8, center=false);
|
|
}
|
|
}
|
|
|
|
// Unthreaded Shank
|
|
if (tlen < l) {
|
|
down(l-tlen) cylinder(d=size, h=l-tlen+0.05, center=false, $fn=sides);
|
|
}
|
|
|
|
// Threads
|
|
down(l) {
|
|
difference() {
|
|
up(tlen/2+0.05) {
|
|
if (tlen > 0) {
|
|
if (P > 0) {
|
|
threaded_rod(d=size, l=tlen+0.05, pitch=P, $fn=sides);
|
|
} else {
|
|
cylinder(d=size, h=tlen+0.05, $fn=sides, center=true);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Bevel bottom end of threads
|
|
if (details) {
|
|
difference() {
|
|
down(0.5) upcube([size+1, size+1, bevbot+0.5]);
|
|
cylinder(d1=size-bevbot*2, d2=size, h=bevbot+0.01, center=false);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Phillips drive hole
|
|
if (headtype != "socket" && phillips != undef) {
|
|
down(headtype != "hex"? H/6 : 0) {
|
|
phillips_drive(size=phillips, shaft=D);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Makes a model of a standard nut for a standard metric screw.
|
|
// size = standard metric screw size in mm. (Default: 3)
|
|
// hole = include the hole in the nut. (Default: true)
|
|
// pitch = pitch of threads in the hole. No threads if not given.
|
|
// flange = radius of flange beyond the head. Default = 0 (no flange)
|
|
// details = true if model should be rendered with extra details. (Default: false)
|
|
// center = If true, center the nut at the origin, otherwise on top of the XY plane. Default = false.
|
|
// Example:
|
|
// metric_nut(size=6, hole=false);
|
|
// metric_nut(size=8, hole=true);
|
|
// metric_nut(size=6, hole=true, pitch=1, details=true, center=true);
|
|
// metric_nut(size=8, hole=true, pitch=1, details=true, flange=3, center=true);
|
|
module metric_nut(
|
|
size=3,
|
|
hole=true,
|
|
pitch=undef,
|
|
details=false,
|
|
flange=0,
|
|
center=false
|
|
) {
|
|
H = get_metric_nut_thickness(size);
|
|
D = get_metric_nut_size(size);
|
|
boltfn = max(12, segs(size/2));
|
|
nutfn = max(12, segs(D/2));
|
|
dcirc = D/cos(30);
|
|
bevtop = (dcirc - D)/2;
|
|
offset = (center == true)? 0 : H/2;
|
|
color("silver")
|
|
up(offset) {
|
|
difference() {
|
|
union() {
|
|
difference() {
|
|
cylinder(d=dcirc, h=H, center=true, $fn=6);
|
|
if (details) {
|
|
up(H/2-bevtop) {
|
|
difference() {
|
|
upcube([dcirc+1, dcirc+1, bevtop+0.5]);
|
|
down(0.01) cylinder(d1=dcirc, d2=dcirc-bevtop*2, h=bevtop+0.02, center=false, $fn=nutfn);
|
|
}
|
|
}
|
|
if (flange == 0) {
|
|
down(H/2) {
|
|
difference() {
|
|
down(0.5) upcube([dcirc+1, dcirc+1, bevtop+0.5]);
|
|
down(0.01) cylinder(d1=dcirc-bevtop*2, d2=dcirc, h=bevtop+0.02, center=false, $fn=nutfn);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (flange>0) {
|
|
down(H/2) {
|
|
cylinder(d=D+flange, h=H/8, center=false);
|
|
up(H/8) cylinder(d1=D+flange, d2=D, h=H/8, center=false);
|
|
}
|
|
}
|
|
}
|
|
if (hole == true) {
|
|
if (pitch == undef) {
|
|
cylinder(r=size/2, h=H+0.5, center=true, $fn=boltfn);
|
|
} else {
|
|
threaded_rod(d=size, l=H+0.5, pitch=pitch, $fn=boltfn);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
|