1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
2 "http://www.w3c.org/TR/html4/strict.dtd">
5 <title>Rolling wire-strip calculator</title>
6 <script type="text/javascript" src="dep.js"></script>
7 <script type="text/javascript" src="dep-ui.js"></script>
8 <link rel=stylesheet type="text/css" href="dep-ui.css">
9 <link rel=stylesheet type="text/css" href="rolling.css">
13 <h1>Rolling wire-strip calculator</h1>
15 <div id=trace style="white-space: pre"></div>
16 <script type="text/javascript"><!--
20 <tr><td colspan=2><h3>Required size</h3>
22 <td class=label><label for=width>Width: </label>
24 <script type="text/javascript"><!--
25 var width = new DEP.Dep();
26 DEP_UI.input_field('width', width, DEP_UI.convert_to_numeric);
29 <td class=label><label for=thick>Thickness: </label>
31 <script type="text/javascript"><!--
32 var thick = new DEP.Dep();
33 DEP_UI.input_field('thick', thick, DEP_UI.convert_to_numeric);
36 <td class=label><label for=length>Length: </label>
38 <script type="text/javascript"><!--
39 var length = new DEP.Dep();
40 DEP_UI.input_field('length', length, DEP_UI.convert_to_numeric);
43 <tr><td colspan=2><h3>You should start with</h3>
45 <td class=label><label for=sq-size>Square side: </label>
46 <td><input id=sq-size readonly>
47 <script type="text/javascript"><!--
48 var sq_size = new DEP.Dep(function () {
49 return Math.pow(Math.pow(width.value(), 2) * thick.value(), 1/3);
51 DEP_UI.output_field('sq-size', sq_size, DEP_UI.convert_from_numeric);
54 <td class=label><label for=rnd-diam>Round diameter: </label>
55 <td><input id=rnd-diam readonly>
56 <script type="text/javascript"><!--
57 var rnd_diam = new DEP.Dep(function () {
58 return 2*sq_size.value()/Math.sqrt(Math.PI);
60 DEP_UI.output_field('rnd-diam', rnd_diam,
61 DEP_UI.convert_from_numeric);
64 <td class=label><label for=start-length>Length: </label>
65 <td><input id=start-length readonly>
66 <script type="text/javascript"><!--
67 var volume = new DEP.Dep(function () {
68 return width.value() * thick.value() * length.value();
70 volume.name = 'volume';
71 var start_length = new DEP.Dep(function () {
72 return volume.value()/(Math.pow(sq_size.value(), 2));
74 DEP_UI.output_field('start-length', start_length,
75 DEP_UI.convert_from_numeric);
78 <tr><td colspan=2><h3>Initial stock</h3>
80 <input type=radio name=stock-type value=round id=stock-round checked>
81 <label for=stock-round>Round section</label>
82 <script type="text/javascript"><!--
83 var stock_type = new DEP.Dep();
84 DEP_UI.input_radio('stock-round', stock_type);
87 <input type=radio name=stock-type value=square id=stock-square>
88 <label for=stock-square>Square section</label>
89 <script type="text/javascript"><!--
90 DEP_UI.input_radio('stock-square', stock_type);
93 <td class=label><label for=stock-size>Stock size: </label>
94 <td><input id=stock-size>
95 <script type="text/javascript"><!--
96 var stock_size = new DEP.Dep();
97 DEP_UI.input_field('stock-size', stock_size,
98 DEP_UI.convert_to_numeric);
101 <td class=label><label for=stock-length>Stock length: </label>
102 <td><input id=stock-length readonly>
103 <script type="text/javascript"><!--
104 var stock_length = new DEP.Dep(function () {
106 switch (stock_type.value()) {
108 cross = 1/4 * Math.PI * Math.pow(stock_size.value(), 2);
111 cross = Math.pow(stock_size.value(), 2);
116 return volume.value()/cross;
118 DEP_UI.output_field('stock-length', stock_length,
119 DEP_UI.convert_from_numeric);
123 <script type="text/javascript"><!--
124 function toggle_help() {
125 var e = DEP_UI.elt('help');
126 var b = DEP_UI.elt('toggle-help');
127 if (e.className.match(/\bconceal\b/)) {
128 b.textContent = 'Hide help';
129 DEP_UI.rm_elt_class(e, 'conceal');
131 b.textContent = 'Show help';
132 DEP_UI.add_elt_class(e, 'conceal');
136 '<button id=toggle-help onclick="toggle_help()">' +
137 'Show help</button>');
140 <script type="text/javascript"><!--
141 DEP_UI.add_elt_class(DEP_UI.elt('help'), 'conceal');
143 <h2>What this program does</h2>
146 <script type="text/javascript"><!--
147 DEP_UI.add_elt_class(DEP_UI.elt('js-note'), 'conceal');
149 <p>This page is only really interesting because it contains a Javascript
150 program. You seem to have Javascript turned off, so it won't work very
156 <p>When you pass round or square wire through flat rolls it gets flatter
157 and longer, but it also gets wider. You can exploit this to make thin
158 wire strip of almost any dimensions, but it’s rather difficult to
159 predict the result. That’s what this calculator does.
161 <p>You specify the width and thickness of the strip you want, and the
162 program calculates what size round or square wire you should start with.
163 Additionally, if you specify the length of strip you need, it will
164 calculate the length of the input wire.
166 <p>The chances are that you don’t actually have the required
167 thickness of round or square wire to start with, but you do have some
168 that’s thicker. Just enter the size of the round or square
169 initial stock that you do have and the program will calculate how much
170 of it you need to create the required starting size that you can then
171 roll down to the required thickness of strip.
173 <p>For best results, roll the strip in as few passes as you can handle.
175 <p>You can see the <a href="rolling-eqn.html">detailed equations</a>
176 used for this calculation if you're interested.
180 <p>Boxes with light red or white backgrounds are entry boxes for you to
181 type in your requirements; boxes with dark red or grey backgrounds are
182 where the calculator puts its answers. White and grey mean that the box
183 is showing useful information: an input box contains a valid number, for
184 example, and an output box has calculated a correct answer. Red, on the
185 other hand, means that there’s something wrong: either the
186 calculator can’t understand what you’ve typed in an input
187 box, or it’s hit trouble – usually this means that some
188 necessary input is missing.
190 <p>You specify the width and thickness of the strip you want, and the
191 program calculates what size round or square wire you should start with.
192 Additionally, if you specify the length of strip you need, it will
193 calculate the length of the input wire.
195 <p>You can use whatever units you like, as long as they are consistent,
196 but you cannot use wire gauges. If you use millimetres, the results
197 will be in millimetres; if you use inches, the results will be in
198 inches. Whatever you use, the results are displayed to only 3 decimal
201 <h3>Code and credits</h3>
203 <p>The code which makes this page work
204 is <a href="http://www.gnu.org/philosophy/free-sw.html">free
206 can <a href="http://git.distorted.org.uk/~mdw/dep-ui/">browse or download
207 it</a>, modify it, and/or redistribute it under the terms of the
208 <a href="http://www.gnu.org/licenses/old-licenses/gpl-2.0.html">GNU
209 General Public License, version 2</a> or, at your option, any later
212 <p>If you make interesting changes, I’d be very grateful to know
213 about them. Please <a href="mailto:mdw@distorted.org.uk">mail me
216 <p>The JavaScript machinery on this page was written by Mark Wooding;
217 the text was written by Mark Wooding and Gary Wooding. The data used
218 to derive the computation was provided by Gary Wooding.