DESIGN OF TORQUE TESTING SETUP FOR SHAFT HAVING SPLINES AT TWO ENDS

The shaft having splines at both ends is used in aircraft door, which is made up of AMS4928 one of Titanium-Aluminum alloy. A latch lock mechanism used to open and close a translating motion aircraft door. A lift lock mechanism that contains a lift lock cam and a follower which follows the cam, as well as a door drive linkage coupled to the cam follower, rotates the latch shaft, operated by a handle rotates the lift lock cam. When the handle is turned there is considerable torsional load applied on the shaft. The present work deals with the designing a rig for testing of a shaft ensuring that its splines are not getting damaged. The test requirement is to twist the rod about 25° and to monitor the torque with end results. This extreme torsional load is considered for those cases where there is no formal application of load but unexpected torsional thrust. The rig is designed in such a way that the rod tilted as per the required tilt by having simple setup. Setup includes adapters to hold the rod and a leverage bar for twisting the shaft.