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在万能铣床铣制螺旋槽工件时,一般的步骤是先计算螺旋槽的导程,然后,按算得的导程,从挂轮表中选取最接近的数值来确定挂轮,由五倍数的挂轮表可知:其最大的导程值为3456.22(毫米),如超过此值,则称之为特大导程,而选取特大导程的挂轮已超出一般挂轮表的范围,在实际工作中,特大导程螺旋槽的工件虽属不多见,但也不等于没有。例如:在计算大直径小螺旋角的斜齿轮及大模数滚刀齿槽的导程时,由导程
General milling milling helical groove workpiece, the general step is to first calculate the spiral groove lead, and then, according to the calculated lead, from the table to select the nearest wheel hanging gear to determine the value of the hanging wheel, linked by a multiple of five Wheel table shows: the maximum lead value of 3456.22 (mm), if more than this value, it is called the extra large lead, and select the extra large lead the hanging wheel has gone beyond the scope of the general hanging table, in the actual work Large oversized spiral groove workpiece is rare, but not equal to none. For example: in the calculation of large diameter small helix angle helical gear and large modulus hob cogging lead by the lead