推荐回答（5个）
第一种，这种卡盘和主轴之间是有一定的锥度的。连接是使用靠中心位置的6只内六角螺栓，安装和更换卡盘就要使用内六角扳手把6只螺丝卸下来。
第二种。这种卡盘和主轴之间的连接是依靠卡盘背后的半圆柱和主轴里的半圆柱互相咬合紧固的。安装和更换是使用卡盘钥匙转动主轴里的半圆柱，与卡盘里的柱呈90度咬合紧固位置。是安装和更换比较简单。
第三种。这也是最常见的一种卡盘与主轴的连接形式。安装或更换，松开螺帽，再把主轴位置的圆盘转动一点距离，带连接螺杆的三爪就可以退下或者安装。
第四种。这种卡盘与主轴之间是螺纹直连接。这种形式连接比较稳固。安装和更换。像拆螺母一样，顺时针旋就是安装上去。逆时针就是卸下。
参考资料来源：百度百科-三爪卡盘
三爪卡盘又称三爪自定心卡盘，它根据工件装夹部分的圆周确定工件的回转中心，但它的定心精度不是很高。一般根据使用场合，在精车、磨削及使用万能分度头铣削精度较高零件等情况下，选用装夹精度较高的三爪卡盘，而在粗车和无形位精度要求的磨削、铣削等加工中，使用装夹精度较低的三爪卡盘。
三爪卡盘装夹工件的原理是，利用卡盘扳手转动圆周上的三个伞齿中的任一个。从而带动平面螺纹转动并带动三个卡爪一齐移动，起到自定心装夹工件作用；从机械结构上看，卡盘的三个伞齿具有相同功能，但是经过仔细检测，三个伞齿装夹工件的精度并不一样，相差也较大
三爪卡盘由卡盘体、活动卡爪和卡爪驱动机构组成。三爪卡盘上三个卡爪导向部分的下面，有螺纹与碟形伞齿轮背面的平面螺纹相啮合，当用扳手通过四方孔转动小伞齿轮时，碟形齿轮转动，背面的平面螺纹同时带动三个卡爪向中心靠近或退出，用以夹紧不同直径的工件。用在三个卡爪上换上三个反爪，用来安装直径较大的工件。三爪卡盘的自行对中精确度为0.05-0.15mm。用三爪卡盘加工工件的精度受到卡盘制造精度和使用后磨损情况的影响。
手动卡：为通用附件，常用的有自动定心的三爪卡盘和每个卡爪可以单独移动的四爪卡盘。三爪卡盘由小锥齿轮驱动大锥齿轮。大锥齿轮的背面有阿基米德螺旋槽，与3个卡爪相啮合。因此用扳手转动小锥齿轮﹐便能使3个卡爪同时沿径向移动，实现自动定心和夹紧﹐适于夹持圆形﹑正三角形或正六边形等的工件
组装部件大体有盘根！卡爪！盘丝！伞齿轮！只要你用心就一定能装好！
主要装卡爪第一将盘丝露出一个头！(每个卡爪上分别有1.号2号.3号标示）把1号爪插入露头处（记得露头应该拧回去！把1爪插到底敲击几下确定到底！要不然卡爪会卡不住产生错牙状态！）旋转卡盘扳手把盘丝头拧到第2个出口（安上2号卡爪）以此类推...安装完整之后记得要用车刀修复卡爪！新买的也要修！要不然跳动不好！看准了再修全部安装完了卡爪内径不会差太多！最多1毫米左右少则十几道！差5毫米左右就是错牙了！要重新安装三个卡爪其他配件不动！！！
安装方法就是这样
我是初级选手老师傅不要笑话我！如有不对地方请老师指点！！
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