一、问题的提出凿岩机功率的充分利用,在很大程度上取决于轴推力的大小。对于特定的凿岩系统它存在一个最佳轴推力值,在该轴推力下凿岩速度最快。试验表明,轴推力过小会带来以下几个问题: 1.钎头和岩石脱离接触,此时能量不能顺利传递到岩石上去,因而能量传递率低;同时还会引起钎杆疲劳应力循环次数增加,导致钎具寿命降低。 2.整机振动较大,零件的使用寿命较短,同时机体振动会导致活塞行程减小,冲击能降低。 First, the question raised The full use of rock drill power, largely depends on the size of the shaft thrust. For a particular rock drilling system it has an optimum shaft thrust value at which rock drilling is fastest. Experiments show that the shaft thrust is too small will bring the following questions: 1 bit and rock disengagement, the energy can not be successfully transferred to the rock up, and thus the energy transfer rate is low; the same time will also cause the fatigue life of the drill rod stress cycles Increase, resulting in reduced solder tool life. 2. Machine vibration larger parts of the shorter life expectancy, while the body vibration will lead to reduced piston stroke, the impact can be reduced.