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              <h1 class="blog-details__title">机械加工选择毛坯料应注意些什么？</h1>
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                <li><i class="far fa-user"></i> 作者：毅鑫五金</li>
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                <li><i class="far fa-calendar"></i> 时间：<time>2022-11-03 16:19:20</time></li>
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                <li><i class="far fa-eye"></i> 浏览：1998</li>
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              <div class="nytpgg mt-20"><a href="https://affim.baidu.com/unique_21982876/chat?siteId=18411907&amp;userId=21982876&amp;siteToken=5a67bf6999f533cf150b42e4300b6d65&amp;cp=www.sitdg.com&amp;cr=%E8%BD%AC%E5%8C%96%E5%AE%A2%E6%9C%8D&amp;cw=" title="点击联系厂家获取机械加工服务" target="_blank" rel="nofollow"><img src="/static/yx/assets/images/nygg.jpg" alt="内页广告"></a></div>
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				  <p>机械加工指通过一种机械设备对工件尺寸或性能开展改变的过程。按加工方式上的差别可分为切削加工和压力加工。机械加工时，针对毛坯料的采用不仅影响毛坯制造的经济性，并且影响机械加工的经济性，所以在选择毛坯时既要考虑机械加工方面的因素，也要考虑经济方面的因素，下面毅鑫五鑫就带大家来了解下机械加工时要怎么选择毛坯料呢。<br/></p><p><img src="/static/upload/20221103/1667463580669291.webp" title="1667463580669291.webp" alt="车床件068.webp"/></p><h3>机械加工选择毛坯料应注意的要点</h3><p>1、铸件</p><p>形状繁杂的零件毛坯，应采用铸造方法制造。目前铸件大多用砂模铸造，它又分木模手工造型和金属模设备造型。木模手工造型铸件精度低，加工表层容量大，生产效率低，适用于单件小批生产或大型零件的锻造。金属模设备造型生产率高，铸件精度高，但设备费用高，铸件重量也受限制，适用于批量生产的中小铸件。其次，少量品质要求较高的小型铸件可采取特种铸造，如压力铸造、离心制造和熔模铸造等。</p><p>2、锻件</p><p>冲击韧性要求高的钢质件，一般得用锻件毛坯。锻件有自由锻造锻件和模锻件两种。自由锻造锻件可用手工锻造(小型毛坯)、机械锤锻(中型毛坯)或冲压机压锻(大型毛坯)等方法得到。这类锻件的精度低，生产率不高，加工余量较大，并且零件的构造务必简易，适用于单件和小批生产，及其制造大型锻件。模锻件的精度和表层质量都比随意锻件好，并且锻件的形态也可比较复杂，因此能减少机械加工容量。模锻生产效率比自由锻高很多，但需要特殊的设备及锻模，故适用于批量较大的中小型锻件。</p><p>3、型材</p><p>型材按截面形状可分为：园钢、方钢、六角钢、扁钢、角铁、槽钢、工型钢及其它独特截面的型材。型材有热扎和冷拉两类。热扎的型材精度低，但价格便宜，用以一般零件的毛坯;冷拉的型材规格较小，精度高，便于完成自动送料，但价格较高，多用于批量较大的生产，适用于自动机床加工。</p><p>4、焊件</p><p>焊件要用焊接工艺而获得的融合件，焊接的特点是制造简易，周期短，节约材料，缺点是抗震性差，变形大，需经时效处理后才能进行机械加工。</p><p>以上四种是机械加工时常见的毛坯料，除此之外，也有冲压件、冷挤压件、粉未冶金等其它毛坯，大型机械加工厂在开展机械加工时应该根据加工规定选择合适的毛坯，这样才能让加工事倍功半。</p><p>以上就是毅鑫五金给大家带来的关于“机械加工选择毛坯料应注意些什么”，希望可以帮到您！</p><p><br/></p>				  <p>本文由毅鑫五金整理发布，如需转载请注明来源及出处，原文地址：https://www.sitdg.com/zixun/139.html</p>
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