一、前言日本的木材加工业比较发达,现有制材业约3万以上,人造板工厂有3百以上,但是,大工厂只占5%,人造板厂也多是单纯制造胶合板,制材厂规模小,木材资源又少,必然要求加工技术的改进,只有用先进技术加工,才能提高出材率。制材当中以建筑用材较多,占各种用材中40%,多为梁柱类和板类。 I. Introduction Japan’s wood processing industry is more developed, the existing system of about 30,000 more than wood-based panels, factories have more than 300, but only 5% of large factories, mostly artificial plywood plant is simply the manufacture of plywood, timber The small scale of the plant and the small amount of wood resources will inevitably require the improvement of processing technology. Only by using advanced technology can we increase the yield rate. Among the timber used in building materials more, accounting for 40% of all kinds of timber, mostly beam column and board class.