螺纹标准(国外英文资料).docVIP

螺纹标准(国外英文资料) Login thread standard _forevermar space Baidu space | Baidu home page | Forevermar the successful people in space are those who learn from others, and those who fail learn only from their own experiences. Success is not something that will happen in the future, but it will continue to accumulate from the moment you decide to do it. A lot of things are predestined, thats fate, but you can decide how to face it, thats luck! The home page blog album | personal files | friends see article Thread standard,, 08 October, Tuesday, a.m., 09:48, thread pitch The tooth distance of metric standard teeth is as follows: M1.6*0.35 M2*0.4 M2.5*0.45 M3*0.5 M4*0.4 M5*0.8 M6*1.0 M8*1.25 M10*1.5 M12*1.75 M14*2.0 M16*2.0 M18*2.5 M20*2.5 M22*2.5 M24*3.0 M27*3.0 M30*3.5 M33*3.5 M36*4.0 Thread introduction The method of turning the workpiece surface into thread is called thread. The thread is divided into three types according to the tooth type: triangle, trapezoid, square and so on (Figure 1). Among them, the common metric triangle thread is the most widely used. Figure 1 types of threads 1. basic teeth of plain triangular threads The basic tooth types of plain triangular thread are shown in Figure 2, and the names of the basic sizes are as follows: Figure 2 ordinary triangular thread basic tooth type D - internal thread big diameter (nominal diameter); D -- big diameter of external screw (nominal diameter); D2 - in diameter of internal thread; D2 - inside diameter of external thread; D1 - inside threaded path; D1 - outside thread path; P pitch; H - primitive triangle height. There are three basic elements that determine the thread: The angle between the two sides of an inner thread of an axial section of an alpha thread. Metric screw, alpha =60o, British screw, alpha =55o. The pitch is P, which is the distance between two adjacent teeth in the direction of the axis. Thread pitch D2 (D2) It is the diameter of an imaginary cylinder of the theoretical height of the flat thread