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数控刀具最容易出现的问题有哪些?

发布时间:2013-08-08
一般是刀片磨损,紧固螺丝滑牙,刀杆刚性不够等
   数控刀具最容易出现问题的是切削刃,什么样硬度的材料就要使用相应材质的刀具,加工使用当中会涉及转速进给等参数,这就要看操作师傅的经验了,使用得当,自然可以使刀具的自然寿命得到完全的利用,使用不当则很容易使刀具非正常损坏.另外刀具的排削能力及冷却方式也是要考虑到的。
另外刀具安装时,要特别注意清洁。镗孔刀具无论是粗加工还是精加工,在安装和装配的各个环节,都必须注意清洁度。刀柄与机床装配及刀片的更换等等,都要擦拭干净,然后再安装或装配,切不可马虎从事。
     刀具进行预调,其尺寸精度,完好状态、必须符合要求。可转位镗刀、除单刃镗刀外,一般不采用人工试切的方法,所以加工前的预调就显得非常重要。预调的尺寸必须精确,要调在公差的中下限,并考虑因温度的因素,进行修正、补偿。刀具预调可在专用预调仪、机上对刀器或其他量仪上进行。
    刀具安装后进行动态跳动检查。动态跳动检查是一个综合指标,它反映机床主轴精度、刀具精度以及刀具与机床的连接精度。这个精度如果超过被加工孔要求的精度的1/2或2/3就不能进行加工,需找出原因并消除后,才能进行。这一点操作者必须牢记,并严格执行。否则加工出来的孔就不能符合要求。
     还应通过统计或检测的方法,确定刀具各部分的寿命,以保证加工精度的可靠性。对于单刃镗刀来讲,这个要求可低一些,但对多刃镗刀来讲,这一点特别重要。可转位镗刀的加工特点是:预先调刀,一次加工达到要求,必须保证刀具不损坏,否则会造成不必要的事故。


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