Quality Assurance and Tolerance

It is in general not possible to produce technical products having precisely predefined measures. Systematic and random deviations from nominal size cannot be avoided, and it is therefore necessary to define measurement tolerances. This book offers a comprehensive presentation of tolerance problems and their solution by statistical methods. All calculated solutions are presented in clear figure or graphical form. It is particularly appropriate for those working in the field of development and construction or in production and quality control, especially in mechanical engineering and related fields. Front Matter....Pages I-X Introduction....Pages 1-2 Concepts....Pages 3-7 Probability Calculation....Pages 8-10 Probability Distributions of Quantitative Characteristics....Pages 11-27 Mathematical and Graphical Evaluation of Dimensional Series....Pages 28-42 Mixed Distributions....Pages 43-70 Distribution Folds....Pages 71-96 Relationship Between Tolerances and Production Distributions....Pages 97-131 Tolerance Calculation Using Square Law....Pages 132-141 Statistical Calculation of Tolerances of Individual Values with Rectangular Distributions....Pages 142-155 Statistical Tolerance Calculation of Individual Values with Trapezoid Distribution or with Triangular Distribution....Pages 156-175 The Tolerance Model....Pages 176-181 Assessment of Completed Batches and Production Batches....Pages 182-228 Process Analysis and Process Capability....Pages 229-256 Process Control....Pages 257-317 Bibliography....Pages 318-320 Appendix....Pages 321-330 Back Matter....Pages 331-335