1. Auto-manufacturing of Quick Coupling in Automobile Industry Lu Peng Sha Linnan Advisor: Prof. Jeremy Li Department of Mechanical Engineering, University of Bridgeport Abstract This paper introduces auto-manufacturing of quick coupling in automobile industry. It will take one type of coupling as a sample to present the manufacturing process of making the final work piece, listing the working procedures which basically comprises milling surface, drilling central hole, turning outside cylinder, milling arcs, milling central slot, shaping remnant of side slot, and so on. On each step, fixture will be designed and machining tools should be confirmed according to the requirement of processing. Based on the manufacturing processes designed for the sample coupling, an advanced manufacturing system will be laid out which is suitable for the coupling family. Due to the similarity on the structure of couplings, some basic manufacturing rules will be applied systematically, which would be summarized into this system. Eventually, the system will make the manufacturing process cheaper, simple and more reliable which satisfies the demand of high-speed, high-effective and more economical in the modern industry. Sample of Coupling Required for Processing Confirming the big cylinder in the center; Confirming the central slot in the center of circle Confirming same center between inside and outside circle Confirming two side flats parallel Confirming two top circles perpendicular to side surface of central slot Confirming two bottom circles symmetrical to the whole piece Working Procedure Milling six surfaces Drilling central hole Turning outside cylinder Milling arcs on two sides Drilling two bottle holes Milling central slot Milling two side flats Milling remnant at two side flats Drilling two top holes Design Requirement Main Manufacturing Processes of coupling Milling 6 Surfaces Drilling Central Holes Milling Arcs on sides Drilling two bottle holes Milling Central SlotMilling two side flats Drilling two top holes The light grey one is the body of fixture. And two red ones are cylinder, using for clamping The green one covering the work piece is the guider, confirming the location for the drill. The worker puts the work piece on the body of fixture. And then close the guider and lock it with the body of fixture. After processing, open the guider and take out the work piece. The inside cylinder is used as reference for milling arcs. The structure is almost the same as milling arcs on sides. Adding the cover is used to confirm the location of drill. The yellow one is the V-block. Two green ones are the pins assembled on the back rack of fixture used for preventing the work piece from rotation. The worker puts the work piece on the V-block, and then V-block slides along the guider powered from the cylinder, consequently, make the work piece reach to the back rack of fixture and two bottle holes are connected with pins. After processing, the V-block moves out, and worker takes out the work piece. Two covers are added on the top of V-block. Because we should process the side flat on the outside surface of cylinder, which is easy for vibration of cutter tool, then, adding the guider could efficiently avoid this condition. Before processing, The worker puts work piece on the V-block and closes the guider locking with the bottom of V-block. After processing, unlock and open the guider, take out the work piece. Adding the guider could make two top holes more accuracy. The green one is a pin, preventing the work piece from rotation. The worker first puts the work piece on the V-block, closes the guider and pushes the pin fit with the bottom hole of work piece, finally uses the C-clamp to grip the guider and V-block for beginning to process Conclusion This paper describes the processes of the auto- manufacturing quick coupling which is very useful and normal in the automobile industry. When we designed the fixtures and process the component, there are several basic manufacturing rules to be applied systematically. For example, machining tools should be normally chosen by the material of work piece. The good machining reference is probably a big surface better than a small surface. Adding guider or using the V-block is theoretically the main concern for confirming the center of circle. Consequently, the rules could be used as a bible for enhancing the working efficiency when processing the same kind of coupling. The quality of coupling could be guaranteed simultaneously. In the modern industry, seeking the way of high-effective, high-speed and more economical is more and more popular and these rules can make the manufacturing process cheaper, simple and more reliable.