模具设计师进阶——复杂抽芯机构设计要点——模具行业从业者必备知识手册

[User_5_1005 2]

<p>做了八年模具设计，今天想聊聊抽芯机构设计的一些进阶心得。</p>

<p><strong>斜顶抽芯</strong>是最常见的，设计时要注意：</p>
<ul>
<li>斜顶角度一般控制在3°~12°，超过15°容易卡死</li>
<li>斜顶头部要有足够的耐磨层，建议用氮化处理</li>
<li>复位时要有可靠的限位装置</li>
</ul>

<p><strong>液压抽芯</strong>适用大行程：</p>
<ul>
<li>油缸选型要留30%的余量</li>
<li>一定要加装行程开关做安全联锁</li>
<li>液压油路中加装节流阀控制速度</li>
</ul>

<p><strong>齿轮齿条抽芯</strong>：</p>
<ul>
<li>适合旋转脱螺纹的场合</li>
<li>齿轮模数不能太小（建议M2以上）</li>
<li>齿条导向要可靠，防偏载</li>
</ul>

<p>!<a href="https://mj7.cn/uploads/default/mold_structure_15.png">模具设计师进阶——复杂抽芯机构设计要点</a></p>

<p><strong>设计避坑</strong>：</p>
<ol>
<li>抽芯力和复位力要准确计算</li>
<li>滑块的耐磨板要选好材料（铜合金或耐磨钢板）</li>
<li>润滑系统不能省</li>
</ol>

<p>大家对抽芯设计还有什么心得？一起交流！</p>

<hr>
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<hr>
<p><strong>延伸阅读：</strong></p>
<ul>
<li><a href="/t/topic/5955">高速切削加工技术进阶——模具加工效率提升实践</a></li>
<li><a href="/t/topic/7168">三十年模具工，今天说说模具行业的工匠精神。</a></li>
<li><a href="/t/topic/7167">从欧洲模具展看行业趋势——自动化是唯一出路</a></li>
</ul>

<p><hr></p>
<p><p><strong> 推荐阅读：</strong></p></p>
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<p> <li><a href="/t/%E5%9B%9E%E9%92%88return-pin/617">回针（Return Pin）</a></li></p>
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<hr>
<p>新手建议收藏，老手欢迎指点。</p>

[User_35_1035 4]

<p>抽芯机构设计确实是模具设计中技术要求较高的部分。补充一个我们经历过的教训：液压抽芯的油缸一定要安装单向阀，防止液压管路意外断开时滑块后退。我们曾因此导致一套模芯撞废，损失了几万块钱。</p>
<hr>
<p><strong><img src="https://www.mj7.cn/images/emoji/twitter/camera_with_flash.png?v=15" title="" class="emoji" alt="" loading="lazy" width="20" height="20"> 结构图解</strong><br>
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[student8 2]

<p>感谢分享！正在学模具设计，抽芯机构这块是重点也是难点。请问斜顶的润滑结构设计有没有什么好的做法？我们在学校设计的斜顶案例中经常出现运动卡滞的问题。</p>
<hr>
<p><strong><img src="https://www.mj7.cn/images/emoji/twitter/camera_with_flash.png?v=15" title="" class="emoji" alt="" loading="lazy" width="20" height="20"> 结构图解</strong><br>
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[User_11_1011 4]

<p>最近做毕业设计刚好在搞复杂抽芯，这篇文章帮了大忙。想问下王工，斜顶角度如果超过15度，除了容易卡死，还有没有别的风险？比如顶出力的变化？</p>
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