QUALITY CONTROL AND ENGINEERING CHANGES IN RE-MANUFACTURING

In the factory environment, and because more than two million parts and other devices are manufactured every year , Caterpillar invested in the most efficient processes for cleaning,savage and machining.Genuine parts are also used in replacement and the technlogy allowed caterpillar to recycle some parts, which are the most expensive major components in other to reduce Customer costs   .Engineering adaptation which are critical and have occured since the original was designed , are incorporated into the manufactured components. All engines are re-manufactured to the original emission certification . The focus of quality control means that many of the same inspection methods are used as would be with a new production . And when considered with the significant of environmental benefits of using manufactured parts, the argument for using such parts wherever possible becomes a compelling action to any responsible organization, (Ian ,2005).
A new service for the power industry involving routine inspction and emmergency testing of both turbine rotor shafts and of the generator retaining rings, and based on a new generation of inspection Equipment are delivered easily and interprets high definition test faster and cheaper than other bore scope systems.The control to the technique is  advanced utrasonic system for non destructive testing , defect characterisation and product sensing called sonomatic It is one of the world;s leader in
a non destructive technology. The system minimizes preparation and testing time to give turn - around and reduces cost. It has also the culmination of more than 15years of non destructive testing around the world. The bore sonic rotor shaft inspection system, known as ISS encompasses the rotor bore shaft itself, and includes ultrasonic inspection of outer surface,The inspection is applied radial axial and radial circumferential direction, and several techniques are applied to inspect the three different régions of the rotor shaft. these includes pulse echo ultrasonics, surface wave techniques and creep wave techniques.additionally time of plight direction(TOFD) may also be used as part of the defect accessment procédures.