Pipe threads where pressure tight joints are made on the threads - part 2 : taper external threads and taper internal threads - dimensions , tolerances and designation 螺纹上有压力密封接缝的管螺纹.第2部分:锥形外螺纹和锥形内螺纹.尺寸公差和名称与符号
Pipe threads where pressure tight joints are made on the threads - part 1 : taper external threads and parallel internal threads - dimensions , tolerances and designation ; german version en 10226 - 1 : 2004 有压力紧固连接件的管道螺纹.第1部分:锥形外螺纹和平
The seams of the internal threads are eliminated by the reverse rotation while producing few chips , and uniform threads diameter is achieved even though the hole diameter is uneven 正转时挤压出内螺纹,逆转时切去内径部的缝隙(有微量碎屑排出) ,从而完成加工。下孔径尺寸即使零乱,也可以做出内径尺寸均一的螺纹。
Closures for collapsible tubes are generally made of plastics materials today , and both thermosetting and thermoplastics types are available with a variety of external shapes and internal threads for screwing tightly on to tube nozzle 当今, (装)膏状物小(金属)管的管盖通常由塑料材料制成,不管是热硬化性塑料还是热塑性塑料皆可,它们外型各异,并配有不同的内螺纹以保证管盖与管口能拧紧。
The main target of the research is to design and manufacture a cat ( computer aided test ) system of joint internal thread , in order to improve the measuring accuracy and quality of the joint internal thread of bao steel inc . this paper analyzes the success and limitation of the former design , and introduces a double probe system 本文目的是研究开发一套接触式油管接头内螺纹计算机测量系统,满足宝钢公司提出的内螺纹检测的要求。论文在分析前人研究设计中的成功经验和不足的基础上,提出了双针测量的系统方案,并对测量系统的数字滤波、算法模型和误差分析进行了深入的研究。