Development Of Swaging Machine For Felting Needles Based On DFQ Method

Cold forging process was the most important step in the process of felting needles. The quality of the process influenced the final quality of felting needles directly. Based on the study of DFQ theory application in product improvement design, accomplished the design of swaging machine for felting needles. So as to enhance the accuracy and efficiency of the processing, reduce machine noise and wear and ensure the quality of felting needles.The whole thesis includes seven chapters:In chapter one:Introduced the background and significance of the subject and described research status of DFQ theory and swaging machine for felting needles at home and abroad. Then showed the main content of this dissertation.In chapter two:Based on the research of QFD, FMEA and TRIZ methods, analysed each strengths and weaknesses in products improvement design and established an DFQ processing model. Describled the whole processing of design from requirements analysis to products manufaturing and presented methods and tools to solve problems at each stage.In chapter three:According to the processing model given in chapter two, analysed the key problems of the previous machine using FMEA method. Used feedback information to determine critical costomer requirments and determined the engineering properties of the machine using QFD method. Based on product planning matrix, established a product functional model and structural decomposition. Then the schedule of the project were given.In chapter four:Analysed the conflicts presented in chapter three using TRIZ method and described the force status of the rotary swaging system. Then combined their results, proposed a design scheme of rotary swaging module and determined the optimal solution. Finally analysed main parts using FMEA method and bulit parts/subsystem configuration matrix.In chapter five:According to key part properties, manufacturing experience and parts FMEA, determined the critical process characteristics. Then combined with the company actual condition, proposed a viable manufacturing process control plan.In chapter six:Completed the assembly and adjustment of the prototype and finished the installation and commissioning of the control system and pneumatic components. Tested the key parameters of the device to determine the optimal value. Finally compared partial performance of the prototype with the previous machine.In chapter seven:Brought out the summary and outlook of this thesis, what’s more, a further research work is prospected.