日本制造了一种新式锯条。采用手锻薄钢片制成。它和一般锯条不同的地方在于:不象一般锯条是在推锯过程中切割材料,而是在拉锯过程中切割材料。这就要求锯齿是反开刃的,而且锯齿的外倾扭角很小。采用这种方式有下列好处:首先在切割过程中,锯条受拉应力,而不象一般锯条受压应力,所以锯条承载能力大,锯条厚度可减小。另外,锥形锯齿可 Japan made a new type of saw blade. Made of hand-forged thin steel sheet. It differs from the general saw blade in that it does not cut the material during the sawing process, but rather cuts the material during the sawing process. This requires that the saw teeth be counter-blade and that the serrations have a small camber. Using this method has the following advantages: First, in the cutting process, the saw blade is under tensile stress, unlike the general saw blade under compressive stress, so the saw blade has a large carrying capacity and the thickness of the saw blade can be reduced. In addition, the taper can be