質(zhì)量管理作業(yè)

精選優(yōu)質(zhì)文檔-----傾情為你奉上精選優(yōu)質(zhì)文檔-----傾情為你奉上專心---專注---專業(yè)專心---專注---專業(yè)精選優(yōu)質(zhì)文檔-----傾情為你奉上專心---專注---專業(yè)質(zhì)量管理作業(yè)活塞環(huán)直徑的頻率分布表[3-6](1)生產(chǎn)異常準(zhǔn)則6：連續(xù)5點中有4點落在中心線同一側(cè)的c區(qū)以外（2）生產(chǎn)異常。準(zhǔn)則7：連續(xù)15點在c區(qū)中心線上下（3）生產(chǎn)異常。準(zhǔn)則1:1點落在A區(qū)以外準(zhǔn)則5：連續(xù)3點中有2點落在中心線同一側(cè)的B區(qū)以外準(zhǔn)則6：連續(xù)5點有4點落在中心線同一側(cè)C區(qū)以外（4）生產(chǎn)異常。準(zhǔn)則2：連續(xù)9點落在中心線同一側(cè)準(zhǔn)則5：連續(xù)3點中有2點落在中心線同一側(cè)的B區(qū)以外準(zhǔn)則6：連續(xù)5點中有4點落在中心線同一側(cè)C區(qū)以外（5）生產(chǎn)穩(wěn)定。判穩(wěn)準(zhǔn)則1：連續(xù)25個點子都在控制界限以內(nèi)[3-9][3-9]見下一頁表格UCLx=X+A2R=10.075+0.729*6.433=14.765UCLx=X+A2R=10.075+0.729*6.433=14.765CLx=X=10.075LCLx=X-A2R=10.075-0.729*6.433=5.385UCLr=D4R=2.282*6.433=14.681CLr=R=6.433LCLr=D3*R=0*6.433=0X圖CL=X圖CL=10.075LCL=5.385UCL=14.765CL=6.433R圖UCL=CL=6.433R圖UCL=14.681樣本序號x1x2x3x4樣本均值X樣本極差R169101510921046117.7573781057.554897139.25659106149.75861211101010.752716108910.758875946.25599710129.5510151681313811812141612.58126139119.75713713101210.5614713101210.56151171016119161510111412.55179812109.75418157101110.75819869128.756201415121614.2542198131210.55225710149923610151110.5924812111010.254251013979.756267141089.757275139129.75828121110910.5329713868.573041013999樣本總均值X10.07515平均樣本極差R6.結(jié)論：如圖所示，根據(jù)判穩(wěn)準(zhǔn)則1，X圖和R圖都處于控制狀態(tài)，所以過程處于控制狀態(tài)。X—R控制圖的控制線可加以延長，作為控制用控制圖供日常管理之用。[3-15](1)p=i=120D/i=120n=6080/UCL=p+3p(1-p)/n=0.134+3CL=p=0.134LCL=p-3p(1-p)/n=0.134-30.134樣本序號樣本大小n樣本不合格品數(shù)D不合格品率pp圖的UCLp圖的LCL124052300.0960.1550.113226144360.1670.1540.114320132210.1100.1570.111422003460.1570.1560.112523062350.1020.1550.113622783270.1440.1550.113723112850.1230.1550.113824603110.1260.1550.113921873420.1560.1560.1121020673080.1490.1560.1121121532940.1370.1560.1121223152670.1150.1550.1131325004560.1820.1540.1141424433940.1610.1550.1131521702850.1310.1560.1121622543310.1470.1560.1121720121980.0980.1570.1111825174140.1640.1540.1141919951310.0660.1570.1112021892690.1230.1560.112小計4538960800.1330.1390.129PP圖CL=CL=0.1342)p=0.134,nmin=1995,nmax=2614當(dāng)K=3，n=1990D=np+Knp(1-p)KDk,nnK1990205021102170223022903312.249320.971329.683338.386347.080355.7652297.053305.547314.036322.517330.993339.4630266.660274.700282.740290.780298.820306.860-1251.464259.276267.092274.911282.733290.558-2236.267243.853251.444259.043266.647274.257-3221.071228.429235.797243.174250.560257.955KDk,nnK2350241024702530259026503364.441373.110381.770390.424399.069407.7082347.927356.386364.840373.289381.733390.1721331.414339.663347.910356.155364.396372.6360314.900322.940330.980339.020347.060355.100-1298.386306.217314.050321.885329.724337.564-2281.873289.494297.120304.751312.387320.028-3265.359272.770280.190287.616295.051302.492對應(yīng)的對應(yīng)的npT圖UCLCLUCLCLLCL3210-1-2-3結(jié)論：由于P圖第1,2,3,4,5,9,13,14,17,18,19個樣本的點子出界，所以過程失控。由于npt圖的第1,2,3,4,5,9，13,14，17,18,19點，超過控制界限，所以過程失控。有兩個圖可知，npt圖和p圖的形狀大致一致，但npt圖的控制界限為直線而且所得結(jié)果是精確的，要方便得多。（5）已知某零件尺寸要求為50-0.1+0.3mm,取樣實際測定后求得X=50.05mm,解：M=Tu+TL2=50.3+49.92=50.1?50.05,M與K=2x-MT=2*(50.05-50.1)50.3-49.9=0.25Cp=Cpk=Cp(1-K)=1.111*(1-0.25)=0.8331.0<Cpk≤0.67所以過程能力不足由于X<M,分布向TL偏移，PL=1-Φ(3Cp(1+K))=1-Φ(3*1.389)=1-Φ(4.167)=0Pu=1-Φ(3Cp(1-K))=1-Φ(3*0.833)=1-P=PL+Pu=0+