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密封用的圆锥管螺纹适用于管子、管接头、旋塞、阀门和其它螺纹联接的零件,大部分用于液压管路和润滑管路的联接,因此提高圆锥管螺纹加工质量,就能提高了管路的密封性能。 一、圆锥管螺纹的标准牙型 圆锥管螺纹标准牙型分为55°牙型角和60°牙型角两种。图1为55°牙型角圆锥管螺纹牙型,标准号为GB7306-87螺纹标记用R_c表示,如R_c1/2。 图2为60°牙型角圆锥管螺纹牙型,标准号为GB/T12716-91,螺纹标记用NPT表示,如NPT1/8。 图4中L_1表示外螺纹有效螺纹长度,L_2表示基
Sealing conical thread for pipe, fittings, cocks, valves and other threaded parts, most of the hydraulic piping and lubrication piping connection, so to improve the quality of the pipe taper pipe, you can increase the tube Road sealing performance. First, the standard conical pipe thread Conical pipe thread standard tooth type is divided into 55 ° dental angle and 60 dental angle two. Figure 1 is a 55 ° tooth angle conical pipe thread tooth profile, standard number GB7306-87 thread mark with R_c said, such as R_c1 / 2. Figure 2 is a 60 ° dental angle conical pipe thread tooth profile, standard No. GB / T12716-91, thread mark with NPT said, such as NPT1 / 8. In Figure 4, L_1 represents the effective thread length of the male thread, and L_2 represents the base