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 <meta name=viewport
content=
"width=device-width initial-scale=1.0">
7 <link rel=stylesheet
type=
"text/css" href=
"dep-ui.css">
8 <link rel=stylesheet
type=
"text/css" href=
"rolling.css">
9 <script type=
"text/javascript" src=
"dep.js"></script>
10 <script type=
"text/javascript" src=
"dep-ui.js"></script>
14 <h1>Rolling wire-strip calculator
</h1>
16 <div id=trace
style=
"white-space: pre"></div>
17 <script type=
"text/javascript"><!--
21 <tr><td colspan=
2><h3>Required size
</h3>
23 <td class=label
><label for=width
>Width:
</label>
25 <script type=
"text/javascript"><!--
26 var width = new DEP.Dep();
27 DEP_UI.input_field('width', width, DEP_UI.convert_to_numeric);
30 <td class=label
><label for=thick
>Thickness:
</label>
32 <script type=
"text/javascript"><!--
33 var thick = new DEP.Dep();
34 DEP_UI.input_field('thick', thick, DEP_UI.convert_to_numeric);
37 <td class=label
><label for=length
>Length:
</label>
39 <script type=
"text/javascript"><!--
40 var length = new DEP.Dep();
41 DEP_UI.input_field('length', length, DEP_UI.convert_to_numeric);
44 <tr><td colspan=
2><h3>You should start with
</h3>
46 <td class=label
><label for=sq-size
>Square side:
</label>
47 <td><input id=sq-size readonly
>
48 <script type=
"text/javascript"><!--
49 var sq_size = new DEP.Dep(function () {
50 return Math.pow(Math.pow(width.value(),
2) * thick.value(),
1/
3);
52 DEP_UI.output_field('sq-size', sq_size, DEP_UI.convert_from_numeric);
55 <td class=label
><label for=rnd-diam
>Round diameter:
</label>
56 <td><input id=rnd-diam readonly
>
57 <script type=
"text/javascript"><!--
58 var rnd_diam = new DEP.Dep(function () {
59 return
2*sq_size.value()/Math.sqrt(Math.PI);
61 DEP_UI.output_field('rnd-diam', rnd_diam,
62 DEP_UI.convert_from_numeric);
65 <td class=label
><label for=start-length
>Length:
</label>
66 <td><input id=start-length readonly
>
67 <script type=
"text/javascript"><!--
68 var volume = new DEP.Dep(function () {
69 return width.value() * thick.value() * length.value();
71 volume.name = 'volume';
72 var start_length = new DEP.Dep(function () {
73 return volume.value()/(Math.pow(sq_size.value(),
2));
75 DEP_UI.output_field('start-length', start_length,
76 DEP_UI.convert_from_numeric);
79 <tr><td colspan=
2><h3>Initial stock
</h3>
81 <input type=radio name=stock-type value=round id=stock-round checked
>
82 <label for=stock-round
>Round section
</label>
83 <script type=
"text/javascript"><!--
84 var stock_type = new DEP.Dep();
85 DEP_UI.input_radio('stock-round', stock_type);
88 <input type=radio name=stock-type value=square id=stock-square
>
89 <label for=stock-square
>Square section
</label>
90 <script type=
"text/javascript"><!--
91 DEP_UI.input_radio('stock-square', stock_type);
94 <td class=label
><label for=stock-size
>Stock size:
</label>
95 <td><input id=stock-size
>
96 <script type=
"text/javascript"><!--
97 var stock_size = new DEP.Dep();
98 DEP_UI.input_field('stock-size', stock_size,
99 DEP_UI.convert_to_numeric);
102 <td class=label
><label for=stock-length
>Stock length:
</label>
103 <td><input id=stock-length readonly
>
104 <script type=
"text/javascript"><!--
105 var stock_length = new DEP.Dep(function () {
107 switch (stock_type.value()) {
109 cross =
1/
4 * Math.PI * Math.pow(stock_size.value(),
2);
112 cross = Math.pow(stock_size.value(),
2);
117 return volume.value()/cross;
119 DEP_UI.output_field('stock-length', stock_length,
120 DEP_UI.convert_from_numeric);
124 <script type=
"text/javascript"><!--
125 function toggle_help() {
126 var e = DEP_UI.elt('help');
127 var b = DEP_UI.elt('toggle-help');
128 if (e.className.match(/
\bconceal
\b/)) {
129 b.textContent = 'Hide help';
130 DEP_UI.rm_elt_class(e, 'conceal');
132 b.textContent = 'Show help';
133 DEP_UI.add_elt_class(e, 'conceal');
137 '
<button id=toggle-help
onclick=
"toggle_help()">' +
138 'Show help
</button>');
141 <script type=
"text/javascript"><!--
142 DEP_UI.add_elt_class(DEP_UI.elt('help'), 'conceal');
145 <script type=
"text/javascript"><!--
146 DEP_UI.add_elt_class(DEP_UI.elt('js-note'), 'conceal');
148 <p>This page is only really interesting because it contains a Javascript
149 program. You seem to have Javascript turned off, so it won
’t work very
150 well. It only requires first-party scripts;
151 see
<a href=
"#privacy">Privacy
</a> for more details.
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.
174 The results aren
’t accurate for broad, thin strips.
175 Width-to-thickness ratios of up to
6:
1 are known to be good; ratios of
176 12:
1 or more don't work: strips don
’t get as wide as predicted by
177 our model. We need to collect more data and construct a better model to
178 handle this case properly.
180 <p>You can see the
<a href=
"rolling-eqn.html">detailed equations
</a>
181 used for this calculation if you
’re interested.
185 <p>Boxes with light red or white backgrounds are entry boxes for you to
186 type in your requirements; boxes with dark red or grey backgrounds are
187 where the calculator puts its answers. White and grey mean that the box
188 is showing useful information: an input box contains a valid number, for
189 example, and an output box has calculated a correct answer. Red, on the
190 other hand, means that there
’s something wrong: either the
191 calculator can
’t understand what you
’ve typed in an input
192 box, or it
’s hit trouble
– usually this means that some
193 necessary input is missing.
195 <p>You specify the width and thickness of the strip you want, and the
196 program calculates what size round or square wire you should start with.
197 Additionally, if you specify the length of strip you need, it will
198 calculate the length of the input wire.
200 <p>You can use whatever units you like, as long as they are consistent,
201 but you cannot use wire gauges. If you use millimetres, the results
202 will be in millimetres; if you use inches, the results will be in
203 inches. Whatever you use, the results are displayed to only
3 decimal
206 <h2>Code and credits
</h2>
208 <p>The code which makes this page work
209 is
<a href=
"https://www.gnu.org/philosophy/free-sw.html">free
211 can
<a href=
"https://git.distorted.org.uk/~mdw/dep-ui/">browse or download
212 it
</a>, modify it, and/or redistribute it under the terms of the
213 <a href=
"https://www.gnu.org/licenses/old-licenses/gpl-2.0.html">GNU
214 General Public License, version
2</a> or, at your option, any later
217 <p>If you make interesting changes, I
’d be very grateful to know
218 about them. Please
<a href=
"mailto:mdw@distorted.org.uk">mail me
221 <p>The Javascript machinery on this page was written by Mark Wooding;
222 the text was written by Mark Wooding and Gary Wooding. The data used
223 to derive the computation was provided by Gary Wooding.
225 <h2 id=
"privacy">Privacy
</h2>
227 <p>There are no cookies or other trackers here. This page does not use
228 externally hosted scripts, fonts, images, or anything else. The server
229 has logged your IP address, which helps me fix things if they go wrong;
230 mostly things work fine and the logs are discarded after a couple of
233 <p>Most web browsers can save a version of this page which can be used