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上海机床厂生产的YA7232B型蜗杆砂轮磨齿机采用电子挂轮技术,磨削斜齿轮时采用无差动形式,具有一定持色。本文运用解析方法重点论述了这种无差动磨齿方案的构形原理、共轭的基本方程及误差传递等若干理论问题。文中指出磨削斜齿轮时齿面是由接触迹沿直母线方向铺展而成,并给出有关方程;同时研究了规则啮合与标准啮合对磨齿精度的影响;通过对误差传递系数的计算,可以指出蜗杆砂轮的轴系精度、机床几何精度、砂轮螺距误差及机床总传动链误差是影响磨齿精度的主要因素。文中主要结论得到了实验的良好验证。目前YA7232B型机床磨削直齿轮可稳定达到机械工业部部标准JB179-83渐开线圆柱齿轮精度”所规定的五级精度,30°以下的斜齿轮可稳定达到六级精度。
Shanghai Machine Tool Plant production YA7232B-type worm wheel grinding machine with electronic hanging wheel technology, grinding helical gear without differential form, with a certain color. In this paper, some analytical problems are discussed, such as the principle of configuration, basic equations of conjugation and error transfer. It is pointed out that when the helical gear is chamfered, the tooth flanks are spread out along the straight generatrix by the contact tracks, and the equations are given. Meanwhile, the influence of the regular meshing and the standard meshing on the grinding accuracy is studied. By calculating the error transfer coefficient, It can be pointed out that the worm wheel grinding wheel shaft accuracy, machine geometry accuracy, wheel pitch error and the total machine tool chain error is the main factor affecting the grinding accuracy. The main conclusions of the paper have been verified experimentally. Currently YA7232B machine grinding spur gear can be stably reached the Ministry of Machinery Industry standard JB179-83 involute cylindrical gear accuracy "under the provisions of the five-precision, helical gear below 30 ° can be achieved six-stage accuracy.