产品全寿命周期六西格玛LCSS中的容差优化设计研究

Optimization Design on the Tolerance of LCSS

基于研发—设计—制造链决定了产品的固有质量的原理,将顾客的声音贯穿于产品生命周期关键环节,开发了产品全寿命周期六西格玛方案 LCSS 路线图。它改进和发展了新产品设计 DFSS 的 IDDOV 流程,提出了由顾客需求分析、系统设计、DFX、可靠性设计、稳定性优化设计和设计验证技术等6个模块组成的迄今世界上最完整的 DFSS 工具箱.按照成本一容差关系、加工余量与工序容差间的关系、工序顺序间的关系建立多容差优化设计的数学模型、提炼了容差优化的流程步骤,通过某汽车变速器精密孔和轴容差优化设计实例说明该方法和流程的效果是显著的。

Based on the principle that the research-design-manufacturing chain determines the product inherent quality, and putting the voice of customer （VOC） into the key links of production life cycle, the route diagram of the production life-cycle six-sigma solutions （LCSS） is developed and the IDDOV （Identify, Define, Develop, Optimize, Verify） process of DFSS （Design For Six Sigma） theory is improved. The most integrated OESS toolbox in the world is proposed, including six modules, such as customer demand analysis, system design, design for X （IOFX）, reliability design, stability design and design verification technique. The mathemati- cal model of the multi-tolerance optimization design is built according to relationship of cost and tolerance, working allowance and process tolerance, and activity sequencing. And the flow chart of toleronce optimization is extracted. This method is applied to the tolerance optimization design of precise hole and shaft of an automobile transmission, and the effect is remarkable.