<?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[模架A板关键尺寸公差控制表——模具行业从业者必备知识手册]]></title><description><![CDATA[<h1>模架A板关键尺寸公差控制表</h1>
<p dir="auto">模架A板加工精度直接影响合模稳定性与模具使用寿命，核心尺寸公差需严格控制，推荐标准如下：</p>
<hr />
<h2>一、平行度公差</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>检测项目</th>
<th>公差要求</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td>上下模板（A/B板）大平面平行度</td>
<td>≤ <strong>0.02mm / 300mm</strong></td>
<td>是防止合模偏移、飞边产生的关键指标</td>
</tr>
<tr>
<td>模板大平面对基面的平行度</td>
<td>≤ <strong>0.015mm</strong></td>
<td>高精度模具要求 ≤ 0.01mm</td>
</tr>
<tr>
<td>镶件安装面与模板大平面平行度</td>
<td>≤ <strong>0.01mm</strong></td>
<td></td>
</tr>
</tbody>
</table>
<p dir="auto"><strong>检测方法</strong>：千分表配合平板检测。</p>
<hr />
<h2>二、垂直度公差</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>检测项目</th>
<th>公差要求</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td>模板相邻侧面垂直度</td>
<td>≤ <strong>0.02mm / 300mm</strong></td>
<td></td>
</tr>
<tr>
<td>导柱孔中心线对模板大平面的垂直度</td>
<td>≤ <strong>0.015mm</strong></td>
<td>垂直度偏差会导致导柱咬死或模板翘曲</td>
</tr>
</tbody>
</table>
<p dir="auto"><strong>加工控制</strong>：铣床或磨床加工时必须严格校正基准。</p>
<hr />
<h2>三、孔位精度</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>孔类型</th>
<th>公差要求</th>
<th>配合标准</th>
</tr>
</thead>
<tbody>
<tr>
<td>导柱/导套孔</td>
<td>Φ <strong>+0.01 ~ +0.02mm</strong></td>
<td>H7/g6 配合，间隙 ≤ 0.015mm</td>
</tr>
<tr>
<td>顶针孔</td>
<td>Φ <strong>0 / -0.01mm</strong></td>
<td>防松动，避免溢料</td>
</tr>
<tr>
<td>螺丝孔（沉头孔）</td>
<td>Φ <strong>+0.2 / +0.4mm</strong></td>
<td>保证螺钉沉入不凸出表面</td>
</tr>
<tr>
<td>运水孔（水路）</td>
<td>± <strong>1.0mm</strong>（位置度）</td>
<td>深度公差需严格控制，防止漏水</td>
</tr>
<tr>
<td>斜顶孔</td>
<td>± <strong>0.02mm</strong>（位置+角度）</td>
<td>角度公差 ±0.3° 以内</td>
</tr>
</tbody>
</table>
<hr />
<h2>四、形位公差与表面粗糙度</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>检测项目</th>
<th>公差要求</th>
</tr>
</thead>
<tbody>
<tr>
<td>平面度（精磨后）</td>
<td>≤ <strong>0.01mm / m²</strong></td>
</tr>
<tr>
<td>配合面表面粗糙度 Ra</td>
<td>Ra ≤ <strong>0.8μm</strong></td>
</tr>
<tr>
<td>非工作面表面粗糙度 Ra</td>
<td>Ra ≤ <strong>3.2μm</strong></td>
</tr>
<tr>
<td>镶件槽配合面表面粗糙度 Ra</td>
<td>Ra ≤ <strong>0.4μm</strong></td>
</tr>
</tbody>
</table>
<hr />
<h2>五、加工余量参考</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>加工阶段</th>
<th>推荐余量</th>
</tr>
</thead>
<tbody>
<tr>
<td>粗加工留余量</td>
<td>+<strong>0.5 ~ +1.0mm</strong></td>
</tr>
<tr>
<td>精磨/精铣余量</td>
<td>+<strong>0.02 ~ +0.05mm</strong></td>
</tr>
<tr>
<td>氮化后精加工去除变形层</td>
<td>+<strong>0.01 ~ +0.03mm</strong></td>
</tr>
</tbody>
</table>
<hr />
<p dir="auto"><em>本文由模极社整理发布，公差标准可根据模具精度等级适当调整。</em></p>
<hr />
<p dir="auto"><img src="https://mj7.cn/uploads/default/process_06.jpg" alt="模架A板关键尺寸公差控制表" class=" img-responsive img-markdown" /></p>
<hr />
<h3><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f4cb.png?v=ri5u9ft48ro" 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>
<li>GB/T 16462 数控机床精度检验</li>
</ul>
<hr />
<h3><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f517.png?v=ri5u9ft48ro" class="not-responsive emoji emoji-android emoji--link" title=":link:" alt="🔗" /> 你可能还感兴趣</h3>
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<p dir="auto">踩过坑的来评论区说说。</p>
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