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目前有不少拉丝厂采用的连续拉丝机是以蜗轮蜗杆为机心传动结构,它和齿轮传动相比较,主要优点是:结构紧凑,传动平稳、无噪音、可以实现很大的传动比等。缺点是:效率低、摩擦发热大,特别是在单线蜗杆情况下,其效率更低。因此采用蜗杆传动的拉丝机一般蜗杆都是三头和四头,但是三头四头蜗杆的加工要求较高,尤其是蜗杆的外径较大,分度的精度不太好掌握,虽然有时采用较精确的分头方法,加工出来的蜗杆也往往会有很大误差。我厂就曾经出现过这种情况,一批加工出来的蜗杆分别装入几台
At present, there are a lot of continuous drawing machines used in wiredrawing plants with worm gear as the heart drive structure. Compared with gear drive, the main advantages are: compact structure, smooth transmission, no noise and great transmission ratio. Disadvantages are: low efficiency, large friction and heat, especially in the case of single-wire worm, its efficiency is lower. Therefore, the use of worm-driven wire drawing machine are generally three and four worm, but three head four-worm high processing requirements, especially the larger worm diameter, indexing accuracy is not good to grasp, although sometimes used The more precise method of dividing the worm, the processing of the worm will often have a great error. I plant there have been such a situation, a group of processed worms were loaded into a few