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              <h1 class="blog-details__title">冲压加工分类有哪些？冲压加工分类介绍</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>2024-09-20 10:21:08</time></li>
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				  <p>冲压加工是一种借助于常规或专用冲压设备的动力，使板料在模具里直接受到变形力并进行变形，从而获得一定形状、尺寸和性能的产品零件的生产技术。冲压加工在现代工业生产中占据着重要的地位，广泛应用于汽车、航空航天、电子、家电等众多领域。冲压加工的分类方式有多种，下面毅鑫五金将从不同的角度对冲压加工进行分类介绍，一起来了解下吧。</p><p><img src="/static/upload/2024/202409208527.webp" alt="" data-href="" style=""/></p><p>二、按工艺性质分类</p><p>1、分离工序</p><p>冲裁</p><p>冲裁是利用冲模将板料以封闭的轮廓与坯料分离的一种冲压方法。它包括落料和冲孔。落料是从板料上冲下所需形状的零件或毛坯，冲下部分为成品，周边是废料；冲孔则是在板料上冲出所需形状的孔，冲下部分为废料，而周边是成品。冲裁时板料的变形过程可分为弹性变形、塑性变形和断裂分离三个阶段。</p><p>切断</p><p>切断是将板料沿不封闭的轮廓分离的一种冲压工序。例如将长条状的板料切成若干段等宽的短料。切断时，刀具或模具刃口与板料的接触线为直线或曲线，其变形过程与冲裁相似，但由于切断的轮廓不封闭，在工艺特点上与冲裁有所不同。</p><p>切边</p><p>切边主要用于去除冲压件边缘的多余材料。在一些经过拉深、翻边等工序后的零件，边缘往往不整齐或者存在多余的材料，切边工序就可以将这些多余部分切除，使零件达到设计要求的尺寸和形状。</p><p>2、成形工序</p><p>弯曲</p><p>弯曲是将板料、型材或管材等按照设计要求弯成一定角度和曲率的工序。在弯曲过程中，板料的内侧受压应力，外侧受拉应力。弯曲半径越小，外侧的拉应力越大，当拉应力超过材料的抗拉强度时，就会导致弯曲件的外侧破裂。弯曲时还会产生回弹现象，即弯曲后的工件角度与模具弯曲角存在一定的偏差，这是因为在弯曲过程中材料发生了弹性变形，当外力去除后，弹性变形部分要恢复。</p><p>拉深</p><p>拉深是将平板坯料拉深成各种开口空心零件的冲压工序。在拉深过程中，板料的凸缘部分在压边圈的作用下逐步缩小直径并被拉入凹模，形成筒形、球形、盒形等形状的零件。拉深时容易出现起皱和拉裂的问题。起皱是因为凸缘部分的材料在切向压应力的作用下失去稳定性而产生的皱纹；拉裂则是由于拉深过程中筒壁传力区的拉应力过大，超过材料的抗拉强度所致。</p><p>翻边</p><p>翻边是在坯料的平面部分或曲面部分上，使板料沿一定的曲线翻成竖立边缘的冲压工序。根据翻边的方向不同，可分为内翻边和外翻边。翻边可以提高零件的边缘强度和刚度，同时还可以用于零件的连接或装配。</p><p>胀形</p><p>胀形是利用模具使板料的局部产生拉伸变形而形成凸起或凹进形状的冲压工序。例如将平板坯料胀成半球形、抛物面形等零件。胀形主要依靠板料的双向拉伸应力，材料在双向拉应力的作用下变薄，因此要求材料具有较好的塑性。</p><p>三、按冲压时的变形力学特征分类</p><p>1、伸长类冲压</p><p>在伸长类冲压过程中，板料的变形区主要受拉应力的作用，材料的厚度变薄，长度和宽度方向伸长。例如胀形工序，板料在胀形凸模的作用下，局部区域的材料被拉伸，厚度减小，表面积增大。伸长类冲压对材料的塑性要求较高，因为在拉应力的作用下，材料容易产生破裂现象。</p><p>2、压缩类冲压</p><p>压缩类冲压时，板料的变形区主要受压应力的作用。例如弯曲工序，在弯曲过程中，板料的内侧受压应力，材料有增厚的趋势。在压缩类冲压中，容易出现起皱的问题，尤其是当压应力超过一定限度时，板料的稳定性会受到影响，从而产生起皱现象。</p><p>四、按模具的结构形式分类</p><p>1、单工序模</p><p>单工序模是在压力机的一次行程中只完成一个冲压工序的模具。例如单独的冲裁模、弯曲模、拉深模等。单工序模结构简单，制造容易，成本较低，但生产效率较低，适用于小批量生产或形状复杂、难以在一副模具中完成多个工序的零件生产。</p><p>2、复合模</p><p>复合模是在压力机的一次行程中，在同一副模具的不同工位上同时完成两种或两种以上冲压工序的模具。例如落料 - 冲孔复合模，在一次冲压过程中，既能完成落料工序，又能完成冲孔工序。复合模的生产效率较高，冲压件的精度也较高，但模具结构复杂，制造难度大，成本高，适用于大批量生产。</p><p>3、级进模</p><p>级进模（也叫连续模）是在压力机的一次行程中，按照一定的顺序在不同的工位上连续完成多个冲压工序的模具。例如在一副级进模中，可以先进行冲孔，然后进行弯曲，最后进行落料等工序。级进模生产效率高，便于实现自动化生产，但模具设计和制造复杂，成本较高，适用于大批量生产形状复杂的冲压件。</p><p>冲压加工的分类方式多样，从工艺性质、变形力学特征到模具结构形式等不同角度进行分类，可以更好地认识冲压加工的各种类型及其特点。不同类型的冲压加工适用于不同的生产需求，在实际的工业生产中，需要根据冲压件的形状、尺寸、精度要求、生产批量等因素，选择合适的冲压加工类型和相应的模具，以提高生产效率、保证产品质量、降低生产成本等。随着现代工业的不断发展，冲压加工技术也在不断创新和提高，新的冲压工艺和模具结构也将不断涌现。</p><p>以上就是毅鑫五金给大家带来的关于“冲压加工分类”，希望可以帮到您！</p><p>毅鑫五金是一家专业提供五金加工、CNC加工、数控车床加工的厂家，可为车床件、冲压件、五金弹簧、五金模具、非标零件等零部件提供精密五金加工服务，欢迎您的咨询！</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/1754.html</p>
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