<?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[异形型腔电极设计：精密模具EDM用石墨电极的加工策略]]></title><description><![CDATA[<p dir="auto">参考图片：石墨电极EDM加工示意。下面详细介绍相关内容。</p>
<p dir="auto"><img src="/uploads/default/original/2X/f/f23dd2d0a5108bcea5a9d78661dda90da51af423.png" alt="石墨电极EDM加工示意" class=" img-responsive img-markdown" /></p>
<p dir="auto"><strong>在高硬度模具钢的异形型腔加工中，电火花（EDM）配合石墨电极是最经济高效的方案。</strong></p>
<h2>石墨电极vs铜电极对比</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>对比项</th>
<th>石墨电极</th>
<th>铜电极</th>
</tr>
</thead>
<tbody>
<tr>
<td>加工速度</td>
<td>快3-5倍</td>
<td>基准</td>
</tr>
<tr>
<td>电极损耗</td>
<td>0.1-0.3%</td>
<td>0.5-1.0%</td>
</tr>
<tr>
<td>表面粗糙度</td>
<td>Ra 0.8-3.2μm</td>
<td>Ra 0.2-1.6μm</td>
</tr>
<tr>
<td>材料成本</td>
<td>低</td>
<td>较高</td>
</tr>
</tbody>
</table>
<h2>电极设计原则</h2>
<ol>
<li><strong>粗电极</strong>：单边放电间隙0.25-0.40mm</li>
<li><strong>精电极</strong>：单边放电间隙0.10-0.20mm</li>
<li><strong>精修电极</strong>：单边放电间隙0.05-0.08mm</li>
</ol>
<h2>EDM参数推荐</h2>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>加工阶段</th>
<th>电流(A)</th>
<th>脉宽(μs)</th>
<th>加工速度</th>
</tr>
</thead>
<tbody>
<tr>
<td>粗加工</td>
<td>15-30</td>
<td>200-400</td>
<td>快</td>
</tr>
<tr>
<td>中加工</td>
<td>8-15</td>
<td>100-200</td>
<td>中等</td>
</tr>
<tr>
<td>精加工</td>
<td>3-8</td>
<td>30-80</td>
<td>慢</td>
</tr>
</tbody>
</table>
<p dir="auto"><strong>参考标准：</strong> GB/T 5291-2008 / JB/T 7455-2007</p>
<p dir="auto"><strong>推荐阅读：</strong> <a href="https://mj7.cn/c/%E5%B7%A5%E8%89%BA%E5%B7%A5%E7%A8%8B" rel="nofollow ugc">电火花加工技术</a> | <a href="https://mj7.cn/c/%E6%95%B0%E6%8E%A7%E5%8A%A0%E5%B7%A5" rel="nofollow ugc">模具加工工艺</a></p>
<hr />
<p dir="auto"><img src="https://forum.mj7.cn/assets/plugins/nodebb-plugin-emoji/emoji/android/1f4cc.png?v=k0o2a4s5i30" class="not-responsive emoji emoji-android emoji--pushpin" title=":pushpin:" alt="📌" /> <strong>相关内容推荐</strong>：</p>
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<li>
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<hr />
<p dir="auto">踩过坑的来评论区说说。</p>
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