Research On Method Of Multi-objective Optimization Design For Gear Transmission Based On QFD

Design is the most important initial link in the development process of mechanical products. It is essential for designers to make sure that the design satisfies the customers'demands. Also it is key that the customer's demands are reflected effectively to the design. Product development for customers'demands has become a tendency. Customers hope that products can be designed according to their demands and focuses. So how to grasp the customers'demands accurately and to realize them into design is a key issue that designers will face in design stage .In this article, the basic ideas and methods of Quality Function Deployment (QFD) are utilized to research the House of Quality structure and its establishment of the familiar gear transmission design, and to study the unfolding model of QFD. Aiming at the question that how to choose the objective function's weighting coefficients in structural design, the optimizations of a two-stage cylindrical gear transmission mechanism and a NGW-type planetary reducer transmission mechanism, are taken as examples and a method how to establish the objective function of the multi-objective optimization based on QFD is put forward .It also explores the applications of QFD method in the corresponding mechanical product development process ,and establishes the product planning's House of Quality of the design objects, gear parts design's House of Quality and multi-objective optimization's House of Quality respectively according to the ASI unfolding model of QFD. Similarly, according to the customers'demands, the objective functions and their weighting coefficients are established reasonably through QFD method so that they can reflect demands into the product development accurately as much as possible and guarantee the quality of the products effectively. As the result, the design can fully embody the demands of the customers. On this basis, the transmission parts'optimization design of a NGW-type planetary gear mechanism is taken as the example, and ADAMS simulation analysis method are also used to develop an integrated design platform and to analyze the simulation result of the optimization so that they can validate the design result. To some extent, the exploration to QFD method, and based on QFD method, the integrated design pattern's establishments of some typical mechanical transmission, which are customers'commends oriented, have certain theory significance and utilization value.