Plastic Welding Process Signature

Abstract

This paper describes a method developed to control the ultrasonic welding quality applied on fuel rails of internal combustion engines. This method consists in monitoring some physical phenomena involved in the welding process, as vibration amplitude, weld energy and process duration. Based in statistical analyses, durability and thermal ageing tests performed with a great population of manufactured parts, it was possible to classify some welding parameters and build a real time filter, able to segregate poor …