车多线蜗杆是中、高级车工技术等级考工一项重要技术内容,尤其是齿距值误差±0.02mm,一般考生较难控制,失分较多。为了保证得到该配分,经车工职业技术实习教学的实践和总结,在采用齿厚游标尺测量基础上,使小滑板轴向进给方向一致基础上,粗车以后,以先车出一齿厚作为齿距测量基准,然后车第二、第三齿距,再车第二、第三齿厚(同时测量齿距)。此方法能有效控制齿距误差值±0.015mm,精度超过考核要求,使学生在此技能考核上,基本都能得分,也为提高学生技能,提高车工中、高级考工合格率起到了重要作用。 Multi-line worm is a medium and high level of technical workers exam level an important technical content, especially pitch error ± 0.02mm, the general candidates more difficult to control, lost more. In order to ensure that the distribution of points, after the practice of vocational and technical teaching practice and concluded that in the use of thick tooth scale ruler measurement based on the same direction of small skateboards to feed the same direction, the rough car after the first car out of a tooth thickness As a measure of pitch, then the car second and third pitch, then car second and third tooth thickness (while measuring pitch). This method can effectively control the tooth pitch error ± 0.015mm, the accuracy exceeds the assessment requirements, so that students in this skill assessment, the basic can score, but also to improve student skills, improve the car workers, the senior pass rate has played an important role .