• CN:11-2187/TH
  • ISSN:0577-6686

›› 2007, Vol. 43 ›› Issue (4): 1-6.

• 论文 •    下一篇

面向质量目标的尺寸链和统计公差设计方法

张宇;杨慕升;李晓沛   

  1. 山东理工大学机械工程学院;机械科学研究院
  • 发布日期:2007-04-15

QUALITY-ORIENTED DESIGN APPROACH OF DIMENSIONAL CHAIN AND STATISTICAL TOLERANCE

ZHANG Yu;YANG Musheng;LI Xiaopei   

  1. College of Mechanical Engineering, Shandong University of Technology China Academy of Machinery Science & Technology
  • Published:2007-04-15

摘要: 为合理确定组成环的统计公差,以实现预期质量目标并保证封闭环的精度和质量指标,需要解决尺寸链设计中质量指标、统计公差和质量控制统计参数的对接和并行设计问题。为此,建立组成环(零件层次)的三层次面向质量目标的统计公差构架,提出保证组成环(零件层次)、封闭环(装配尺寸)的精度及质量指标的尺寸链和统计公差设计方法,结合案例说明面向质量目标的统计公差技术在尺寸链设计计算中的综合应用。封闭环和各组成环的公差、质量指标和统计公差是可以被并行设计、协调配置、定量分析的。这种新的尺寸链统计公差设计方法可以获得包括完整电子图表和系统软件技术的支持,根据封闭环的精度和质量指标合理分配各组成环的统计公差,同时充分利用各组成环的已知统计参数,以经济的公差和统计过程控制方法实现预期的装配精度和质量目标。

关键词: 尺寸链, 统计公差, 统计过程控制, 质量指标

Abstract: In order to reasonably determine the statistical tolerances (STs) of components links for realizing predeter- mined quality targets and assuring the precision and quality targets of closing link, it is necessary to settle the problems of the configuration and concurrent design of quality indices, STs and the parameters of SPC in design for dimensional chain. A scheme consists of three levels of quality-oriented statistical tolerancing for components links is established, and the design approach for assuring the precision and quality targets of components links and closing link is presented, and the comprehensive application of quality–oriented statistical tolerancing technique in design and calculation for dimensional chain is shown by a case study. The STs, quality indices of closing links and component links can be concurrently designed, coordinately distributed and quantitively analyzed. This new design approach for dimensional links can be supported by a series of electrical tables with graphics and systematic software. It can distribute the STs of each component links based on the precision requirement and quality target of closing link, and fully utilize the known statistical parameters of component links to realize the predetermined precision and quality by the economical manufacturing tolerances and suitable SPC method.

Key words: Dimensional chain, Quality index, Statistical process control, Statistical tolerance

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