| 摘要 |
The disclosure relates to a lead-in type interference fit pipeline external thread which can be sealed without packing, a useful thread thereof is a taper pipe thread, there are at least two turns of complete variation convex threads in the full length of the useful thread, a pitch diameter of the variation convex thread is larger than a corresponding reference standard taper thread by a predetermined interference fit amount, a flank of the variation convex thread is a convex arc surface. The disclosure also relates to a manufacturing method, a manufacturing device of the lead-in type interference fit pipeline external thread and a pipe product with the lead-in type interference fit pipe thread pair.
|
