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在某一方面,切刀(Cutting tool)的润滑问题很与轴承(Bearing)的润滑问题相似。在切割金属时,切割力与切割速度使切刀上发生高温与磨耗,其情形与普通轴承上所发生的情形极为类似蜷曲的切屑(Chip)是在切刀的刃背(Lip)上滑动的,所以前者可与旋转着的轴相比,而后者则可与轴承相比。但两者将润滑油引到压力部份的方法有极大的分别。在切割金属时,以前有一错误的理论,以为切屑自工作物撕裂远在刀锋以前,因此造成一个空隙使得切割液可被切屑撕裂时所发生的真空吸入;这空隙被认为与轴承上的油槽相似,切屑可从空隙内吸取润滑油到刃背上的压力或摩擦部份,犹如一个旋转的轴从油槽内吸取润滑油到轴承中的压力部份一样。
In one aspect, the lubrication problem of the cutting tool is very similar to the lubrication problem of the bearing. Cutting force and cutting speed cause high temperature and wear on the cutter when cutting metal, the situation is very similar to what happens on ordinary bearings Curly chip (Chip) is sliding on the knife’s lip (Lip) , So the former can be compared with the rotating shaft, while the latter can be compared with the bearing. However, there is a great difference between the two methods of introducing lubricant to the pressure part. In cutting metals, there was a misleading theory that the chips were torn from the workpiece much earlier than the blade, thus creating a gap that would allow the cutting fluid to be sucked in by the vacuum that would occur when the chip was torn; this gap was thought to be associated with Similar to the oil sump, the chip sucks the pressure or friction from the gap into the blade back as if a rotating shaft sucked the oil from the sump into the pressure part of the bearing.