| 摘要 |
The annular surfaces of two components 56, 57 bear axially against each other in order to be joined by spin welding upon relative rotation and define an inner flash trap zone surrounded by an annular weld zone and an outer flash trap zone surrounding the annular weld zone. The annular surfaces define a weld land 64 and void 66 flanked by complimentary annular projections 60 and troughs 62 to function as the inner and outer flash trap zones and so to seal the weld zone against melt leakage. The projections 60 may appear on one component while the troughs 62 on the other. Alternatively, each component has a projection and trough to cooperate with those on the other. Again the surface 68 of one component 57 may be plain while the other 56 includes troughs 62 which alone form the trap zones. The void 66 projects at an angle of 3 to 5 degrees. <IMAGE> |
