<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[模具设计公差与配合标准 - 精密模具尺寸链计算与公差分配指南]]></title><description><![CDATA[<p dir="auto">模具精度控制的核心在于公差与配合的正确选择。</p>
<h2>一、模具配合类型</h2>
<p dir="auto"><strong>间隙配合</strong>：轴和孔之间存在间隙，用于运动件</p>
<ul>
<li>导柱与导套：间隙0.01~0.02mm</li>
<li>顶针与顶针板：间隙0.02~0.05mm</li>
<li>滑块与导轨：间隙0.015~0.03mm</li>
</ul>
<p dir="auto"><strong>过渡配合</strong>：用于定位件，如镶件与模板、定位圈与模板</p>
<p dir="auto"><strong>过盈配合</strong>：用于固定件</p>
<ul>
<li>导套与模板：过盈0.005~0.015mm</li>
<li>浇口套与模板：过盈配合</li>
</ul>
<h2>二、模具常用配合代号</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>配合类型</th>
<th style="text-align:center">推荐代号</th>
<th>应用部位</th>
</tr>
</thead>
<tbody>
<tr>
<td>滑动配合</td>
<td style="text-align:center">H7/f7</td>
<td>导柱导套</td>
</tr>
<tr>
<td>精密滑动</td>
<td style="text-align:center">H6/g6</td>
<td>精密导柱</td>
</tr>
<tr>
<td>过渡配合</td>
<td style="text-align:center">H7/m6</td>
<td>镶件</td>
</tr>
<tr>
<td>过盈配合</td>
<td style="text-align:center">H7/p6</td>
<td>导套</td>
</tr>
<tr>
<td>过盈配合</td>
<td style="text-align:center">H7/s6</td>
<td>浇口套</td>
</tr>
</tbody>
</table>
<h2>三、尺寸链计算</h2>
<p dir="auto">极值法（小批量高精度）：T0 = ΣTi<br />
概率法（大批量）：T0 = √(ΣTi²)</p>
<h2>四、重要部位公差</h2>
<p dir="auto"><strong>分型面</strong>：平面度0.01~0.02mm/200mm<br />
<strong>滑块与滑轨</strong>：间隙0.015~0.025mm<br />
<strong>斜顶与导向块</strong>：间隙0.01~0.02mm，角度3°~12°<br />
<strong>顶针与顶针孔</strong>：间隙0.02~0.03mm</p>
<h2>五、未注公差标准</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th style="text-align:center">基本尺寸(mm)</th>
<th style="text-align:center">f(精密)</th>
<th style="text-align:center">m(中等)</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:center">≤3</td>
<td style="text-align:center">±0.05</td>
<td style="text-align:center">±0.1</td>
</tr>
<tr>
<td style="text-align:center">6~30</td>
<td style="text-align:center">±0.1</td>
<td style="text-align:center">±0.2</td>
</tr>
<tr>
<td style="text-align:center">30~120</td>
<td style="text-align:center">±0.15</td>
<td style="text-align:center">±0.3</td>
</tr>
</tbody>
</table>
<p dir="auto"><strong>总结：</strong> 运动件用间隙配合、定位件用过渡配合、固定件用过盈配合。建立配合数据库可提高设计效率。</p>
<hr />
<p dir="auto"><strong><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f527.png?v=90ct0okuiem" class="not-responsive emoji emoji-android emoji--wrench" title=":wrench:" alt="🔧" /> 相关工具推荐：使用在线模具计算器快速估算参数</strong></p>
<p dir="auto">[mj-clamping-force]</p>
<hr />
<p dir="auto"><em><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f4a1.png?v=90ct0okuiem" class="not-responsive emoji emoji-android emoji--bulb" title=":bulb:" alt="💡" /> 提示：以上计算工具为纯前端实现，数据仅在本地运算，不会上传至服务器。</em></p>
<hr />
<h3><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f4cb.png?v=90ct0okuiem" class="not-responsive emoji emoji-android emoji--clipboard" title=":clipboard:" alt="📋" /> 相关标准参考</h3>
<ul>
<li>GB/T 12555 塑料注射模模架</li>
</ul>
<hr />
<h3><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f517.png?v=90ct0okuiem" class="not-responsive emoji emoji-android emoji--link" title=":link:" alt="🔗" /> 你可能还感兴趣</h3>
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<hr />
<p dir="auto"><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f4cc.png?v=90ct0okuiem" class="not-responsive emoji emoji-android emoji--pushpin" title=":pushpin:" alt="📌" /> <strong>相关内容推荐</strong>：</p>
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<hr />
<p dir="auto">新手建议收藏，老手欢迎指点。</p>
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