141 lines
6.8 KiB
HTML
141 lines
6.8 KiB
HTML
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<title>評估製程可加工性 | HiAPI-C# 2025 </title>
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<h1 id="評估製程可加工性">評估製程可加工性</h1>
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<p><strong>可加工性時序圖</strong>可以評估製程斷刀。</p>
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<p>斷刀會發生於<strong>降伏應力比</strong>(Yielding Stree Ratio)、<strong>主軸最大扭矩比</strong>(Max Spindle Torque Ratio)、<strong>主軸最大功率比</strong>(Max Spindle Power Ratio)其中任一項超過100%且持續時間大於一步仿真。
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如果超過甚多，概括地說是200%以上，則時間不用持續也會斷刀。</p>
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<blockquote>
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<p><strong>注意</strong>：預設仿真為每轉銑削模式，仿真一步為主軸一轉。</p>
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</blockquote>
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<p>小刀具斷刀通常是刀具承受力不夠，斷刀會基於<strong>降伏應力比</strong>。</p>
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<p>中小刀具斷刀通常是主軸性能不足，斷刀會基於<strong>主軸最大扭矩比</strong>、<strong>主軸最大功率比</strong>。
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當切削阻力超過主軸性能時，機床進給不變但是主軸轉速持續降低，使得每刃進給持續增大，所以切削力會飆高至斷刀或停機。</p>
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<div class="NOTE">
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<h5>Note</h5>
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<p><strong>斷刀解決方案</strong></p>
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<p>更改加工路徑降低切寬深 或 以HiNC優化功能調整進給率，將<strong>降伏應力比</strong>、<strong>主軸最大扭矩比</strong>、<strong>主軸最大功率比</strong>降至100%以下。</p>
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</div>
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<h2 id="熱塑刃">熱塑刃</h2>
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<p>如果<strong>熱塑刃應力比</strong>(Thermal Yield Ratio)超過100%，則會發生刀刃熱塑變，加速磨耗。
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與降伏應力比、主軸最大扭矩比、主軸最大功率比不同，它是長期指標，超過100%也不會造成立即性影響。</p>
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<div class="NOTE">
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<h5>Note</h5>
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<p><strong>熱塑刃解決方案</strong></p>
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<p>在解決斷刀問題的前提下，降低轉速，讓刀刃有充足時間散熱。</p>
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<p>注意冷卻液是否對準刀刃影響甚大。刀刃沒有對準刀具，相當於降低熱散係數。</p>
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</div>
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<p>刀具廠商通常會提供加工條件，而依照該加工條件模擬所得的熱塑刃應力比通常都超過100%，因為刀具材料的製程配方與HiNC依保守原則的訂定的預設值有差異。
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如果認為超過100%的熱塑刃應力比的加工條件才是合理的，可以調整刀具材料的熱傳性質，使得計算出的熱塑刃應力比貼近100%。</p>
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</article>
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