Views:742 Author:Site Editor Publish Time: 2017-01-04 Origin:Site
A blind rivet has strength properties that can be measured in terms of shear and tensile strength. Occasionally rivets also undergo performance testing for other critical features, such as pushout force, break load and salt spray resistance. A standardized destructive test according to the Inch Fastener Standards is widely accepted.
The shear test involves installing a rivet into two plates at specified hardness and thickness and measuring the force necessary to shear the plates. The tensile test is basically the same, except that it measures the pullout strength. Per the IFI-135 standard, all blind rivets produced must meet this standard. These tests determine the strength of the rivet, and not the strength of the assembly. To determine the strength of the assembly a user must consult an engineering guide or the Machinery's Handbook.
The tensile test on fastened rivet is made using the equipment as described at pic. 5 of UNI EN ISO 14589:2003 specification. The mechanical features in the catalogue are comparable with the corresponding specifications of reference.
The shear test on fastened rivet is made using the equipment as described at pic. 3 of UNI EN ISO 14589:2003 specification. The mechanical features in the catalogue are comparable with the corresponding specifications of reference.
This test is made as defined in the corresponding specification of each rivet type. The test is carried out in compliance with ISO 14589:2003, to check that the remaining part of the pin into the rivet cannot be pushed out by the testing load.
The strength for the pin pushout must be higher than 10 N when subject to test in compliance with ISO 14589:2003 specification.