| 摘要 |
A blind-riveting assembly comprises a tubular rivet with a flange at one end and a mandrel which projects from the rivet flange and can be pulled to set the rivet at its tail end. The mandrel has heads (4, 5) at both ends, one to set the rivet and the other to engage pulling means of the setting tool. At least the pulling head (5) of the mandrel, and preferably also the setting head (4), is rounded. The mandrel has a neck (6) within the rivet at which it breaks when the rivet has been set. The invention enables a shorter mandrel to be used, and facilitates its economical manufacture without adversely influencing the characteristics of the break neck. |
