质量管理作业

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1、质量管理作业活塞环直径的频率分布表[3-6](1)生产异常准则6：连续5点中有4点落在中心线同一侧的c区以外（2）生产异常。准则7：连续15点在c区中心线上下（3）生产异常。准则1:1点落在A区以外准则5：连续3点中有2点落在中心线同一侧的B区以外准则6：连续5点有4点落在中心线同一侧C区以外（4）生产异常。准则2：连续9点落在中心线同一侧准则5：连续3点中有2点落在中心线同一侧的B区以外准则6：连续5点中有4点落在中心线同一侧C区以外（5）生产稳定。判稳准则1：连续25个点子都在控制界限以内[3-9]见下一

2、页表格UCLx=X+A2R=10.075+0.729*6.433=14.765CLx=X=10.075LCLx=X-A2R=10.075-0.729*6.433=5.385D4=2.282D3=0A2=0.729UCLr=D4R=2.282*6.433=14.681CLr=R=6.433LCLr=D3*R=0*6.433=0X图CL=10.075LCL=5.385UCL=14.765CL=6.433R图UCL=14.681样本序号x1x2x3x4样本均值X样本极差R169101510921046117.757

3、3781057.554897139.25659106149.75861211101010.752716108910.758875946.25599710129.5510151681313811812141612.58126139119.75713713101210.5614713101210.56151171016119161510111412.55179812109.75418157101110.75819869128.756201415121614.2542198131210.55225710149923

4、610151110.5924812111010.254251013979.756267141089.757275139129.75828121110910.5329713868.573041013999　　　　样本总均值X10.07515　　　　平均样本极差R　6.709677结论：如图所示，根据判稳准则1，X图和R图都处于控制状态，所以过程处于控制状态。X—R控制图的控制线可加以延长，作为控制用控制图供日常管理之用。[3-15](1)p=i=120D/i=120n=6080/45389=0.134当n=24

5、05UCL=p+3p(1-p)/n=0.134+30.134(1-0.134)/n=0.155CL=p=0.134LCL=p-3p(1-p)/n=0.134-30.134(1-0.134)/n=0.113以此类推样本序号样本大小n样本不合格品数D不合格品率pp图的UCLp图的LCL124052300.0960.1550.113226144360.1670.1540.114320132210.1100.1570.111422003460.1570.1560.112523062350.1020.1550.1136

6、22783270.1440.1550.113723112850.1230.1550.113824603110.1260.1550.113921873420.1560.1560.1121020673080.1490.1560.1121121532940.1370.1560.1121223152670.1150.1550.1131325004560.1820.1540.1141424433940.1610.1550.1131521702850.1310.1560.1121622543310.1470.1560.1

7、121720121980.0980.1570.1111825174140.1640.1540.1141919951310.0660.1570.1112021892690.1230.1560.112小计4538960800.1330.1390.129P图CL=0.1342)p=0.134,nmin=1995,nmax=2614当K=3，n=1990D=np+Knp(1-p)=1990*0.134+31990*0.134(1-0.134)=312.249以此类推KDk,n　n1990205021102170223

8、022903312.249320.971329.683338.386347.080355.7652297.053305.547314.036322.517330.993339.4630266.660274.700282.740290.780298.820306.860-1251.464259.276267.092274.911282.733290.558-2236.267243.853251.444