Designing Capable and Reliable Products Episode 1 Part 1 docx

... Abbreviations 1 Introduction to quality and reliability engineering 1. 1 Statement of the problem 1. 2 The costs of quality 1. 3 How and why products fail 1. 4 Risk as a basis for design 1. 5 Designing ... manufacturing industry. In Chapter 4, a probabilistic design x Preface Designing Capable and Reliable Products Designing Capable and Reliable Products J...

Ngày tải lên: 06/08/2014, 15:21

... diculty exists in ascertaining the 22 Introduction to quality and reliability engineering Figure 1. 13 The 10 Â rule of fault related costs by percentage (DTI, 19 92) 0 1 2 3 4 5 Relative company cost to ... (Kotz and Lovelace, 19 98; Vasseur et al., 19 92) . Making the product robust to variation is the driving force behind designing capable and reliable products, l...

Ngày tải lên: 06/08/2014, 15:21

... the potential risks of failure and their consequences, both from normal use and fore- seeable misuse, is a key element in designing capable and reliable products (Wright, 19 89). 1. 5 Designing for quality The ... there is relatively little work Figure 1. 19 The FMEA input into designing capable and reliable products Designing for quality 25 Hooper, 19 86; Car...

Ngày tải lên: 06/08/2014, 15:21

... risk chart, s p 48 Designing capable components and assemblies Figure 2 .16 Assembly sequence diagram for a castor wheel 62 Designing capable components and assemblies Figure 2 .13 Process capability ... sheet Figure 2 .15 Empirical relationships between (a) q m and C pk and (b) q m and C p (with 95% conđdence limits) 58 Designing capable components and assemblie...

Ngày tải lên: 06/08/2014, 15:21

... stress are shown below and involve all three principal stresses (Dowling, 19 93): C 1  1 2 s 1 ÿ s 2 jj  Su c ÿ 2Su Su c s 1  s 2  ! 4:59 C 2  1 2 s 2 ÿ s 3 jj  Su c ÿ 2Su Su c s 2  s 3  ! 4:60 C 3  1 2 s 3 ÿ ... the stress system. 2Sy 2 s 1 ÿ s 2  2 s 2 ÿ s 3  2 s 3 ÿ s 1  2 4:57 where s 1 , s 2 , s 3 are the prin...

Ngày tải lên: 06/08/2014, 15:21

... ÿ4 .28 35 105 2. 6 26 40 0.0397 4.6540 ÿ3 .20 62 135 2. 4 24 64 0.0637 4.9053 2. 720 8 165 4.4 44 108 0.1077 5.1059 2. 1 720 195 6.4 64 1 72 0.1716 5 .27 30 ÿ1.6700 22 5 6.9 69 24 1 0 .24 06 5.4161 ÿ1 .29 02 255 ... 0.7494 6.0753 0. 324 9 465 5 .2 52 8 02 0.8014 6.1 420 0.48 02 495 3.5 35 837 0.8364 6 .20 46 0.5935 525 2. 9 29 866 0.8654 6 .26 34 0.6959 555 2. 7 27 893 0.8...

Ngày tải lên: 06/08/2014, 15:21

... R A R B 30 Â60 Â 5 30 5 .2 45.1 34 6.9 50.8 0.648 724 0 .33 039 1 30 Â60 Â 6 26 4 .2 39 .2 29 7.0 43. 6 0.918951 0.71 531 9 50 Â65 Â 5 21 1.1 31 .2 26 4.8 38 .8 0.99 929 9 0.918648 50 Â65 Â 6 1 83. 0 27 .0 22 5.9 32 . 9 ... ÿ0.041 150 .3 16 0.5161 0.041 150 .3 17 0.5484 0. 121 150 .3 18 0.5806 0 .20 4 150 .3 19 0.6 129 0 .28 7 150 .3 20 0.64 52 0 .3 72 151 .3 21 0.677...

Ngày tải lên: 06/08/2014, 15:21

... value, therefore:  umax    u  3  u  379 :4 319 43 6 :4 MPa F  1:5708 umax d 2  1:5708 Â 43 6 :4 Â 10 6 Â 0:0 42 2  1 :21 MN Case studies 24 7 Additionally, a structured concurrent product ... process and designing capable and reliable products that have been highlighted through industrial collaboration. Introduction 25 5 . Changing the role of design eng...

Ngày tải lên: 06/08/2014, 15:21

... gives: 407, 4 15, 420 , 424 , 426 , 428 , 433, 433, 436, 438, 440, 4 42, 443, 444, 4 45, 447, 447, 449, 450 , 450 , 451 , 4 52 , 4 52 , 453 , 453 , 454 , 455 , 456 , 459 , 460, 4 62, 466, 466, 469, 470, 471, 4 72, 474, ... 424 , 444, 455 , 4 62, 4 95, 426 , 5 02, 447, 438, 436, 498, 474, 51 5, 483, 454 , 453 , 447, 4 85, 456 , 443, 449, 466, 4 45, 4 52 , 478, 407, 433, 466, 428 , 4 52 ,...

Ngày tải lên: 06/08/2014, 15:21

... Occurrence, Severity and Detectability 29 6 Appendix III distribution for comparison: y  Nw   2 p exp  ÿ x ÿ  2 2 2   50 Â 18 23 :45  2 p exp  ÿ x ÿ 457: 76 2 23 :45 2 2  To ®nd ... ÿ49:98 2  7 Â49:97 ÿ49:98 2 10 Â49:98 ÿ49:98 2  8 Â49:99 ÿ 49:98 2  6 Â50 ÿ49:98 2 2 Â50:01 ÿ49:98 2  1 Â50: 02 ÿ49:98 2 40 v u u u u u...

Ngày tải lên: 06/08/2014, 15:21

... gives a Handling Ratio Total Ratings/Essential Parts 2. 5 . Fitting analysis gives a Fitting Ratio Total Ratings/Essential Parts 2. 5. Beneđts The potential beneđts of DFA/DFM are: . Reduced part ... processes Appendix IV 3 17 Appendix IV Process capability maps Index to maps Sheet A Casting processes Sand casting ± Steel and iron Sand casting ± Copper alloys Sand casting ± Aluminium...

Ngày tải lên: 06/08/2014, 15:21

... Calculation of q m Drawing number FQ2 186 m p  1 Â 1 :2  1 :2 g p  1 Â1 Â 1:7 Â 1 Â1 Â1 :2  2: 04 Adjusted tolerance  Design tolerance m p g p ặ0 :25 1 :2 2: 04 ặ0:1 02 t p 9 1 9 s p 1 Â 1  1 q m  ... Calculation of q m Drawing number FF476 m p  1 Â 1 :2  1 :2 g p  1 Â1 Â 1 1 1 1 :2 1 :2 Adjusted tolerance Design tolerance m p g p ặ0 :25 1 :2 1 :2 ặ0:174 t p 6...

Ngày tải lên: 06/08/2014, 15:21

... mean () and standard deviation () Lognormal distribution   exp     2 2   exp 2  2 2 ÿexp 2   2  0:5 2- parameter Weibull distribution  %  Á ÿ 1  1  !  %  Á  ÿ0: 92 6 See ... 1:5Â1:05 0:0 32 mm The standard deviation for one half of the tolerance can be estimated by:  H b %  T 2  Á q 2 m 12  0: 025 Â 2: 5 2 12  0:013 mm Using the algeb...

Ngày tải lên: 06/08/2014, 15:21

...  2 x i  1 2  n i 1  @ 2  @x 2 i  2 Á  4 x i  0:5 Therefore, substituting in values gives:  L  666:66 2 Â 10 000 2  1 2 6 :25 10 10  2 Â 10 000 4   2: 226 10 9  2 Â 0:0003 2  1 2 1:4839 ... Â0:05  2 Â 10 000 2   ÿ 100 000 0:03 2 Â 0:05  2 Â 0:0003 2   ÿ 100 000 0:03 Â0:05 2  2 Â 0:0004 2 ! 0:5  2 L  4:4444...

Ngày tải lên: 06/08/2014, 15:21

... 135, 138, 20 1, 28 1, 356 ÿ 7 Process capability 6, 7, 28 8 ÿ 9 indices 41, 115 , 164, 28 9 ÿ 90, 29 1 ÿ 2 maps 43, 47, 50 ÿ 5, 114 ÿ 15, 313 ÿ 32 and tolerances 3, 41 ÿ 2 worked example 29 2 ÿ 4 PRocess ... 357 ÿ 8 Standard error, data 145 Standard Normal Distribution (SND) 28 2 ÿ 7 table of values 28 4 ÿ 5 Standard Normal variate 146, 28 2 Standards BS 6079 (risk managem...

Ngày tải lên: 06/08/2014, 15:21