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在通过建造柔性制造系统来使机械制造实现质的转变的时候,提高刀具过载保护的可靠性和自动化程度,具有特殊的迫切性。 现有的棒状刀具(钻头、铰刀、丝锥)保护装置都是在刀具非工作部分按加工前同步制做出的几条磁性线之间的错位量来控制刀具的扭转角的;当扭转角超过允许的极限值时,便控制进给量。这种装置有以下两个缺点:不能判定刀具的短时脉冲过载(例如,由于材料硬度的不均匀),因为刀具过载时达到极限扭转角的时间可能很长,反应速度慢,从而降低了保护的可靠性。
There is a particular urgency in raising the reliability and automation of tool overload protection by enabling flexible manufacturing systems to make qualitative changes in machinery manufacturing. Existing rod-shaped tools (drill, reamer, tap) protection devices are in the tool non-operating part of the pre-processing synchronization to make a few magnetic lines between the amount of dislocation to control the tool twist angle; when the twist angle When the permissible limit is exceeded, the feed rate is controlled. This type of device has the following two drawbacks: it is not possible to determine a short-time overload of the tool (due to, for example, unevenness of the material hardness) because the tool reaches the limit twist angle for a long time in the event of overload, slows the reaction and reduces the protection The reliability.