推荐回答（3个）
先申明:3轴、5轴是指伺服马达数量，3轴就是总共3个伺服马达。以5轴为例:横行使用1个伺服马达，1轴; 主臂用2个马达:升降1个、引拔1个; 副臂用2个马达:升降1个、引拔1个;至于3轴的，主要是没有副臂，也就少了2个。另外，大吨位的机械手虽然也是只有主臂，但也是5轴的，主要是因为，工作头处的夹具反转气缸换成伺服马达，又增加了夹具旋转马达。刚好又2轴……
五轴机械手在使用过程中的性能要更好，有更高的灵活性，可以在百度了解一下伯朗特这个厂家的五轴机械手，挺好用的，可以广泛的应用在生产中，不容易出现质量问题。
在注塑机械手的分类中，我们常说的三轴、五轴伺服机械手指的是伺服马达的数量。3轴指这台机械手有3个伺服马达 ，5台是5个伺服马达。 在实际注塑自动化应用场景中，我们常说的五轴伺服机械手可以有三种形式：
1. 1伺服主臂+1伺服料臂， 双臂五轴伺服机械手
这种结构是市面上最常用的五轴伺服机械手结构，主要用于冷流道三板模注塑自动化系统中。 两个伺服手臂中主臂负责成品的取出，也可以用在埋镶件系统中镶件埋入并成品取出；副臂则负责捡水口。 思为客汽车窗刷马达外壳模内埋镶件自动化解决方案是一个典型的两板模五轴伺服机械手主臂+料臂注塑自动化应用解决方案，由主臂完成铁片及螺母的埋入并产品取出，副臂负责料头的捡出。
2. 双主臂五轴伺服机械手
双主臂伺服机械手主要用于叠模注塑自动化系统中。同三板模不同，叠模的两个模腔中均为成品，因此要求五轴伺服机械手的两个手臂均为成臂。思为客双臂五轴伺服机械手的典型应用有叠模4+4快餐盒取出方案和宜家莫玛特童桌桌面自动取出装配方案。
3. 单臂五轴伺服机械手
单臂五轴伺服机械手的应用场景在于要求治具能够任意角度旋转的场合。在一般情况下，伺服机械手的手臂常用导角气缸，可以实现取件后旋转90度放置。 但在实际注塑生产过程中，我们有可能会遇到要求手臂末端治具能够实现前后、左右360度任意旋转。在这种情况下就需要我们给机械手加上额外的伺服轴以满足实际生产的自动化需求。
在实际的应用中，根据不同的结构设计，可以组装出具有不同特点的五轴伺服机械手，以满足企业的实际生产自动化需求。
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