论文部分内容阅读
目前,在大多数工厂里,直齿圆锥齿轮的切齿工序是在刨齿机床上进行的。现行的方法,一直沿用刨齿刀具的齿形角必须等于被切齿轮的压力角。但是,在一般机械修配工作中,为了修复国外的或旧式的机械设备,常需加工各种不同标准制压力角的齿轮(如20°、15°、14.5°以及22.5°等等)。同时,某些机械设计的需要,偶尔也采用a=25°或a=28°的齿轮。为此,就需配备多种模数(或径节),多种压力角的刨齿刀。由于是修配,不可能配备数量繁多的专用刀具;且利用率低而不经济。为了经济地解决这些不同标准制压力角的直齿圆锥齿轮的加工问题,我们根据渐开线啮合原理,提出了用国产常用的标准压力角a_0=20°的刨齿
At present, in most factories, the straight tooth bevel gear cutting process is carried out on a gear cutting machine. In the current method, the gear tooth angle of the gear cutter must always be equal to the pressure angle of the gear to be cut. However, in general mechanical repair work, gears of various standard pressure angles (such as 20 °, 15 °, 14.5 ° and 22.5 °, etc.) are often required to repair foreign or old-style mechanical equipment. At the same time, some mechanical designs require, occasionally, gears of a = 25 ° or a = 28 °. To do this, you need to be equipped with a variety of modulus (or diameter section), a variety of pressure angle gear shaper. Because it is a fitting, it is impossible to equip a large number of special tools; and the utilization rate is low and not economical. In order to economically solve the machining problems of spur bevel gears with different standard pressure angles, according to the principle of involute meshing, we put forward that the common standard pressure angle a_0 = 20 °