梯形螺纹中的三角函数问题

在加工梯形螺纹过程中，测量螺纹中径、根据测量的中径确定进刀量以及磨出符合要求的梯形螺纹车刀是三个重要的环节。本文用数学的三角函数知识对它们进行了理论分析，以此启迪学生，数学，作为一切工程技术和科学研究的基础工具，是多么的美妙和重要。

On Trigonometric Function Problems in the Trapezoidal Thread

In the process of working on the trapezoidal thread, measuring pitch diameter of thread, determining the amount of feed according to the diameter, and grinding out required trape-zoidal thread turning tool are three important steps. In this paper, the writer uses trigonometric function knowledge of mathematics to conduct a theoretical analysis, in order to inspire students to know that mathematics, as a basic tool of all engineering technol-ogy and scientific research, is so wonderful and important.