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由铸铁/铸铁组成的机床导轨副有以下缺点:容易发生拉毛;摩擦系数较大,导致机床功率消耗增加及导轨发热;低速运动时易出现爬行等等。其原因是:导轨副的两个滑动面系由硬度相同的同种材料制成,易产生钻着现象。这是不符合摩擦学设计原则的。一、塑料导轨干摩擦特性金属/塑料(尤其是铸铁/塑料)组成的导轨副,在一定程度上可以克服铸铁/铸铁导轨副的弊病。塑料一般用在导轨副中较短导轨的滑动面上。常
Made of cast iron / cast iron machine guide rail pairs have the following disadvantages: prone to nap; larger friction coefficient, resulting in increased machine power consumption and guide fever; slow movement prone to crawling and so on. The reason is that: the two sliding surfaces of the guide rail are made of the same kind of material with the same hardness, which is easy to cause drilling phenomenon. This is not in line with tribology design principles. First, the plastic rail dry friction characteristics Metal / plastic (especially cast iron / plastic) composed of rail pairs, to a certain extent, can overcome the shortcomings of cast iron / cast iron rail pair. Plastic is generally used on the sliding surface of the shorter guideway in the guideway pair. often