论文部分内容阅读
目前用三针法测量外螺纹单一中径时,多数情况下采用非最佳三针进行测量,但现有资料里的三针法测量数学模型都是在最佳三针的基础上推导出来的。为了分析非最佳三针测量外螺纹单一中径的可行性和实用性,文章推导了采用非最佳三针测量时的数学模型,同时还推算了精密测量时测量结果的误差修正值及非最佳三针直径的选择,为非最佳三针测量外螺纹单一中径提供了可靠的理论依据。
At present, when measuring the single diameter of the external thread by the three-needle method, the most optimal three-needle measurement is used in most cases. However, the three-needle measurement mathematical model in the existing data is deduced from the best three-needle method . In order to analyze the feasibility and practicability of the non-optimal three-pin measurement of the single diameter of the male thread, the mathematical model of the non-optimal three-pin measurement is deduced and the error correction value of the measurement result during the precision measurement is deduced The choice of the best three-pin diameter provides a reliable theoretical basis for measuring the single-diameter of the non-optimal three-pin male thread.