The Design Of Automatic Rotary Rivet-Placing System

CD player is an important device in every vehicle nowadays. The rivets and axes for fixing inside the Player are play an very important part in the perfonnance of the player. There are so many different parts in the body. The quantity is large and the installation precision is very high. Nowadays the operation of the rivet-placing is almost manual. Because of human fatigue, not only causes low efficiency, but also can't ensure the quality of installation. In order to avoid these disadvantages, we design an automatic rivet-placing system which will increase the efficiency and achieve automation in the placing operation. The system is really of high practical use.The process of automatic riveting is introduced in this paper. Furthermore, hardware related and their control software is also completed. Main tasks finished are:1. Introduce the program of automatic Rivet-placing system. The structure of manipulator is designed and showed as a model with PRO/E. Also, the motion parameters and way of drive and transmission of the manipulator is discussed. Additionally, this paper gives suggestion on the improvement of available devices in order to save cost.2. The implement of automatic control. The movement of holes for rivets is realized by the movement of the XY numerical control platform. The Nl-Motion module embedded in LabVIEW is used to complete the automatic control along the scheduled track.3. Positioning based on machine vision system. The shape of the CD body is regular enough to be treated as a whole. So the deviation of the distance of holes can be ignored, as the deviation brought by the process of clamping can not. In order to get higher positioning precision, technology of machine vision is raised to inspect the key point of the CD body. The result consists of the measurement of offset brought by move and revolution of the coordinate system. The whole automatic positioning control can be implemented while the compensation is taken into consideration in the process of control of motors as in real world.