用成形刀具(如指状或圆片成形铣刀)加工齿轮时,如按展成法加工齿轮的公式来计算切削深度,就会造成次品或废品(齿厚将被铣薄或公法线将被铣小),在生产中很容易出现这样的错误。这是两种不同的加工方法,刀齿相对于被加工齿槽的位置也各不相同。用展成法加工时,刀齿相对于齿槽的位置是在不断变化;在展成每一个齿的过程中,刀齿与齿槽之间的位置总会出现如图1所 When forming a gear with a forming tool, such as a finger or wafer forming cutter, calculating the depth of cut as shown in the formula for developing the gear results in defective or scrap (the tooth thickness will be thinned or the common normal Milled small), in production is prone to such a mistake. There are two different ways to do this, and the position of the tooth relative to the slot being machined varies. With the exhibition into law processing, the relative position of the tooth relative to the alveolar is constantly changing; in the process of developing each tooth, the position between the tooth and the alveolus will always appear as shown in Figure 1