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要提高齿轮精度,首先要提高滚齿机的精度,而分度蝸轮的精度对滚齿机精度起着主要作用。对已失去精度的分度蜗轮,决非用一般加工方法或用人工拂刮能修复的。据一般资料介绍,精度较低、且误差较小的小模数小型蜗轮,可以用珩磨方法修复;而对二米滚齿机的10模数、直径1670毫米、精度较差的大型蜗轮(连台面共重约2.6吨),目前尚是设备检修中的老大难问题。若用精密大型滚齿机单滚加工,装拆时要变形;如配滚,又因台面超过蜗轮直径,要碰刀架,如果在大型专用机床上配滚,则减少安装时所产生的蝸轮副中心线位移和蝸轮副中心角偏移的误差也很困难。在生产新高潮的推动下,我们依靠群众,组织三结合,发扬敢想敢说精神,采取自由滚切新工艺作了大胆的尝试。
To improve the gear accuracy, we must first improve the accuracy of gear hobbing machine, and the accuracy of indexing worm gear hobbing machine plays a major role. The indexing worm gear that has lost its accuracy must never be repaired by ordinary processing methods or by manual brushing. According to the general introduction of information, the accuracy is lower, and the error is small, small module small worm can be repaired by honing method; and two meters hobbing machine 10 modulus, diameter 1670 mm, poor precision large worm Weighs about 2.6 tons), is still a chronic problem in the maintenance of equipment. If the use of precision large hobbing machine single-roll processing, when the demolition to deformation; such as with roller, and because the table exceeds the diameter of the worm, to touch the knife holder, if equipped with large-scale dedicated machine tool, then reduce the installation of the worm gear The error of centerline displacement and worm gear center angle offset is also very difficult. Driven by a new upsurge of production, we have made bold attempts to rely on the masses, organize themselves in three combinations, carry forward the spirit of daring to dare to say something, and adopt the new technology of free rolling.