混合型锯链的研究

A STUDY ON MIXED TYPE SAW CHAIN

混合型锯链是由直齿式锯链的切齿和刨齿与刨刀式锯链的刨旋齿组合而成。在东北林区使用多年,受到普遍欢迎。本文利用T-2型链锯切削试验台对这种锯链进行了试验和测定。试验表明,混合型锯链横截红松和槭木时,锯截效率高于刨刀式;横截紫椴和硬桦时,前者低于后者,但高于直齿式锯链。斜截时,混合型锯链的跑偏量大于刨刀式,小于直齿式,但锯截效率下降很小。可见混合型锯链优于直齿式锯链,适于伐木作业。混合型锯链有各种功能的锯齿,故平均每齿受力小。

The mixed type saw chain was developed by Northeast loggerfellers. This type saw chain consists of the cutter and planer teeth from straight cutter chain and the curved cutter teeth from chipper chain. This type saw chain has been used widely for many years in the Northeast China. An experiment and study on this type saw chain was conducted with the T-2 saw chain experiment desk. The result shows that the cross-cutting efficiency of the mixed type chain on pine and maple tree species is higher than chipper chain. The angle cutting efficiency is a little lower than chipper chain, but the kerf declination is greater than chipper chain and less than straight cutter chain. The mixed chain has shown great advantage in felling over straight cutter chain. As the mixed type chain has various teeth which perform different functions and the number of teeth is greater, so the force and stress on every tooth is less than that on the chipper chain. The domestic chipper chain often subject to breakage due to low quality material and technology. For the time being, the mixed type saw chain should be widely used in China for felling.