METHOD AND DEVICE FOR CRIMPING COMPOSITE ELECTRICAL INSULATORS

摘要

When crimping metal end fittings (3) onto a fibre glass core rod (2) of a high or medium voltage electrical insulator (1) cracks may appear in the rod. To enable an early detection and prediction of cracks a monitoring method is proposed which includes the steps of: measuring the force and/or pressure applied to the end fittings (3) by the crimping jaws (11) during the crimping, measuring the distance travelled by the jaws (11) during the crimping, detecting a change in the ratio between force and/or pressure and distance. Using force and/or pressure transducers in the crimping apparatus allows a very reliable monitoring of the crimping process.