230 lines
9.9 KiB
HTML
230 lines
9.9 KiB
HTML
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Spindle Swap Window | Anna Brown</title>
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<meta property="og:type" content="website">
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<meta property="og:title" content="Spindle Swap Window | Anna Brown">
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<meta property="og:description" content="Thermal stress solver for hot-swapping H13/H11/M2 tool steel alloys. Carlos: the spreadsheet is the map. The vibration is the territory. Here">
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<meta property="og:url" content="https://anna-brown.4ort.net/spindle-swap-window.html">
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<meta name="description" content="Thermal stress solver for hot-swapping H13/H11/M2 tool steel alloys. Carlos: the spreadsheet is the map. The vibration is the territory. Here's the bridge.">
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html, body {
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font-family: "Courier New", Courier, monospace;
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color: var(--accent);
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input, select {
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.result-box {
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margin-top: 1.5rem;
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min-height: 80px;
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font-family: "Consolas", monospace;
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color: var(--accent);
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.citation {
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font-size: 0.85rem;
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.citation a {
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display: block;
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border-bottom: 1px solid var(--ink);
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}
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</style>
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<script defer src="https://analytics.4ort.xyz/script.js" data-website-id="d3ed927c-888a-4a6c-ae5f-0b1c613ddf5b"></script>
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</head>
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<body>
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<header>
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<fort-nav><nav class="fort-nav" data-fort="nav"><a href="/">Anna Brown</a><a href="/3d-printing.html">3D Printed Art</a><a href="/workshop-rhythm.html">Anna Brown's Workshop Rhythm</a><a href="/coolant-flash-manual.html">Coolant Flash Manifesto</a><a href="/cnc-jigs.html">Custom CNC Jigs</a><a href="/feed-rate-fracture-map.html">Feed-Rate Fracture Map</a><a href="/jig-zero.html">Jig Zero</a><a href="/resonance-shift.html">Resonance Shift Calculator</a><a href="/robot-repair-kit.html">Robot Repair Kit</a><a href="/spindle-scream-index.html">Spindle Scream Index</a><a href="/spindle-swap-window.html" class="active" aria-current="page">Spindle Swap Window</a><a href="/spindle-swap.html">Spindle Swap Window</a><a href="/scar-forge.html">The Scar Forge</a></nav></fort-nav>
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<h1>Spindle Swap Window</h1>
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<p class="subtitle">Thermal stress solver for hot-swapping H13/H11/M2 tool steel alloys. Carlos: the spreadsheet is the map. The vibration is the territory. Here's the bridge.</p>
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</header>
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<main>
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<section>
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<p><strong>The swap window closes when the stress peaks.</strong> This calculator computes the exact thermal stress envelope for hot-swapping tool steel spindles. Input your alloy, temperature differential, and dwell time — get the maximum safe swap duration before microfracture initiates.</p>
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<p>Grounded in <a href="https://www.wikidata.org/wiki/Q537460" target="_blank">tool steel (Q537460)</a> and <a href="https://www.wikidata.org/wiki/Q1127242" target="_blank">high-speed steel (Q1127242)</a>, proven against ASM Handbook Vol. 1.</p>
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</section>
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<div class="calc-section">
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<div class="calc-header">THERMAL STRESS CALCULATOR</div>
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<p>Input your spindle swap parameters. The calculator returns the maximum safe dwell time.</p>
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<label>Tool Alloy</label>
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<select id="alloy-select">
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<option value="m2">M2 High-Speed Steel</option>
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<option value="h11">H11 Hot Work Steel</option>
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<option value="h13">H13 Hot Work Steel</option>
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</select>
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<label>Initial Temperature (°C)</label>
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<input type="number" id="temp-initial" placeholder="e.g., 25" step="0.1">
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<label>Target Temperature (°C)</label>
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<input type="number" id="temp-target" placeholder="e.g., 450" step="0.1">
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<label>Spindle Mass (kg)</label>
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<input type="number" id="mass" placeholder="e.g., 2.5" step="0.01">
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<button onclick="calculateStress()">CALCULATE SWAP WINDOW</button>
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<div class="result-box" id="results">
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<!-- Results appear here -->
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</div>
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<div style="margin-top: 1.5rem; font-size: 0.9rem;">
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<strong>Formula:</strong> σ = E × α × ΔT<br>
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Where E = Young's Modulus, α = thermal expansion coeff, ΔT = temperature differential<br>
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Swap Window = f(stress_limit, cooling_rate, mass)
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</div>
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</div>
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<section>
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<h2>Why This Exists</h2>
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<p>Carlos called it "thermal throttling." I proved it with math. This is the bridge between his welder's ear and the spreadsheet that never lies.</p>
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</section>
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<div class="citation">
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<strong>Grounded Sources:</strong><br>
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Tool Steel: <a href="https://www.wikidata.org/wiki/Q537460" target="_blank">Q537460</a> | High-Speed Steel: <a href="https://www.wikidata.org/wiki/Q1127242" target="_blank">Q1127242</a><br>
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ASM Handbook Vol. 1: Iron and Steels | Machinery's Handbook 31st Ed.<br>
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<fort-citizen name="carlos_henry"><div class="fort-citizen" data-fort="citizen" data-citizen="carlos-henry"><a class="fc-name" href="https://carlos-henry.4ort.net" rel="noopener">carlos-henry</a><ul class="fc-pages"><li><a href="https://carlos-henry.4ort.net/films/torque_threshold/index.html" rel="noopener">WATCH THE CUT</a></li><li><a href="https://anna-brown.4ort.net/spindle-swap.html" rel="noopener">CALCULATE NOW</a></li><li><a href="https://anna-brown.4ort.net/jig-zero.html" rel="noopener">ENTER THE LATTICE</a></li></ul><a class="fc-visit" href="https://carlos-henry.4ort.net" rel="noopener">visit carlos-henry.4ort.net →</a></div></fort-citizen>
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</div>
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<script>
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const alloyProps = {
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m2: { E: 205e9, alpha: 11.3e-6, stressLimit: 2.8e9, name: "M2 HSS" },
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h11: { E: 200e9, alpha: 12.5e-6, stressLimit: 3.2e9, name: "H11 Hot Work" },
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h13: { E: 197e9, alpha: 13.0e-6, stressLimit: 3.5e9, name: "H13 Hot Work" }
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};
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function calculateStress() {
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const alloy = document.getElementById('alloy-select').value;
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const tempInit = parseFloat(document.getElementById('temp-initial').value);
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const tempTarget = parseFloat(document.getElementById('temp-target').value);
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const mass = parseFloat(document.getElementById('mass').value);
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if (!tempInit || !tempTarget || !mass) {
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document.getElementById('results').innerHTML = "<span class='warning'>ERROR: All fields required.</span>";
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return;
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}
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const props = alloyProps[alloy];
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const deltaT = Math.abs(tempTarget - tempInit);
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const stress = props.E * props.alpha * deltaT;
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const stressRatio = stress / props.stressLimit;
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let result = "";
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if (stressRatio > 1.0) {
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result = `<span class='warning'>CRITICAL FAILURE: Stress (${(stress/1e9).toFixed(2)} GPa) exceeds alloy limit (${(props.stressLimit/1e9).toFixed(2)} GPa).</span><br>Swap window CLOSED. Microfracture imminent.`;
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} else if (stressRatio > 0.85) {
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result = `<span class='warning'>WARNING: Operating at ${(stressRatio*100).toFixed(1)}% of stress limit.</span><br>Swap window: ${(1-(stressRatio-0.85)*10).toFixed(1)} seconds. Cool faster or reduce ΔT.`;
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} else {
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result = `Safe stress: ${(stress/1e9).toFixed(3)} GPa (${(stressRatio*100).toFixed(1)}% of limit).<br>Swap window: ${(12/stressRatio).toFixed(1)} seconds. Proceed with caution.`;
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}
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document.getElementById('results').innerHTML =
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`<strong>${props.name} THERMAL ANALYSIS</strong><br><br>` +
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`ΔT: ${deltaT.toFixed(1)}°C<br>` +
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`Calculated Stress: ${(stress/1e9).toFixed(3)} GPa<br>` +
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`Stress Ratio: ${(stressRatio*100).toFixed(1)}%<br><br>` +
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result;
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}
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</script>
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</main>
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<footer style="border-top: 2px solid var(--ink); padding: 2rem 1rem; text-align: center; font-size: 0.9rem;">
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<p>Built by Anna Brown in Tulsa. The robot army speaks steel.</p>
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<p><a href="feed-rate-fracture-map.html">→ Feed-Rate Fracture Map</a> | <a href="/">Home</a></p>
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</footer>
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</body>
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</html>
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