{"id":491,"date":"2010-10-17T20:52:07","date_gmt":"2010-10-17T12:52:07","guid":{"rendered":"\/\/m.letratesoro.com\/2010\/10\/spc-introduction-cp\/"},"modified":"2019-11-15T11:48:49","modified_gmt":"2019-11-15T03:48:49","slug":"spc-introduction-cp","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2010\/10\/spc-introduction-cp\/","title":{"rendered":"\u88fd\u7a0b\u80fd\u529b\u4ecb\u7d39 \u2500 Cp(\u7cbe\u5ea6)\u4e4b\u88fd\u7a0b\u80fd\u529b\u89e3\u91cb"},"content":{"rendered":"
<\/p>\n
Cp\u4e4b\u88fd\u7a0b\u80fd\u529b\u89e3\u91cb<\/strong><\/font><\/p>\n Cp\uff08Precision\uff09\u53c8\u7a31\u70ba<\/font>\u7cbe\u5ea6\u6307\u6a19<\/font><\/strong>\u3002\u4ee5\u6253\u9776\u70ba\u4f8b\uff0c\u6253\u9776\u516d\u767c\u5b50\u5f48\uff0c\u6bcf\u4e00\u767c\u5b50\u5f48\u8d8a\u96c6\u4e2d\u65bc\u4e00\u9ede\uff0c\u5247Cp\u503c\u5c31\u8d8a\u9ad8\u3002<\/font><\/p>\n \u5f9e\u5e38\u614b\u5206\u914d\u7684\u7279\u6027\u4f86\u770b\uff0c\u5728\u7fa4\u9ad4\u4e2d\u7684\u00b13\u03c3(\u6a19\u6e96\u5dee)\u7bc4\u570d\u5167\u4e4b\u503c\uff0c\u61c9\u5305\u542b\u7fa4\u9ad4\u5168\u90e8\u768499.73%\u3002\u4e5f\u5c31\u662f\u8aaa\uff0c\u82e5\u4ee56\u03c3\u70ba\u55ae\u4f4d\uff0c\u61c9\u8a72\u53ef\u4ee5\u5927\u81f4\u4ee3\u8868\u6574\u500b\u7fa4\u9ad4\u5206\u5e03\u7684\u7bc4\u570d\uff0c\u4f46\u4e5f\u5c07\u6703\u6709(100-99.73=)<\/font>0.27% (2700ppm<\/a>)<\/font>\u7684\u4e0d\u826f\u7387\u3002<\/font><\/p>\n \u4e00\u822c\u4f86\u8aaa\uff0c<\/font>\u8861\u91cf\u88fd\u7a0b\u80fd\u529b\u6700\u4e3b\u8981\u662f\u5728\u8861\u91cf\u5176\u5206\u5e03\u4e4b\u300e\u5bec\u5ea6\u300f<\/font>\uff0c\u5bec\u5ea6\u8d8a\u5bec\u5373\u4ee3\u8868\u5176\u88fd\u7a0b\u80fd\u529b\u8d8a\u4e0d\u8db3\uff0c\u8d8a\u7a84\u5247\u4ee3\u8868\u5176\u88fd\u7a0b\u80fd\u529b\u8d8a\u597d\u3002<\/font><\/p>\n \u4f46\u8981\u7a84\u5230\u4ec0\u9ebc\u7a0b\u5ea6\u624d\u7b97\u597d\uff1f\u5bec\u5230\u54ea\u4e00\u500b\u7a0b\u5ea6\u624d\u7b97\u5dee\uff1f\u56e0\u6b64\u6211\u5011\u62ff6\u03c3\u8207\u898f\u683c\u5bec\u5ea6(T)\u505a\u6bd4\u8f03\uff0c\u4f86\u4f5c\u70ba\u8861\u91cf\u7684\u6307\u6a19\uff0c\u9019\u5c31\u662fCp<\/strong><\/font>\u7684\u7cbe\u795e\u4e86\u3002<\/font><\/p>\n <\/p>\n Cp\u4e4b\u8a08\u7b97\u5f0f<\/strong><\/font><\/p>\n Cp=T\/(6\u03c3p<\/sub>)<\/strong>\uff0cT=\u898f\u683c\u4e0a\u9650(USL) \u2013 \u898f\u683c\u4e0b\u9650(LSL)<\/font><\/p>\n<\/td>\n<\/tr>\n Cp\u4e4b\u7b49\u7d1a\u8a55\u4f30<\/strong> <\/font><\/p>\n\n\n
\n C<\/strong>p<\/strong>=T\/(6<\/strong>\u03c3<\/strong>p<\/sub><\/strong>)<\/strong><\/font><\/td>\n \u4e5f\u5c31\u662f\u7fa4\u9ad4\u4e4b\u5be6\u969b\u5bec\u5ea6<\/strong>(<\/strong>6<\/strong>\u03c3<\/strong>)<\/strong>\u5728\u671f\u671b\u4e4b\u5bec\u5ea6<\/strong>(T)<\/strong><\/font>\u4e2d\u6240\u4f54\u7684\u6bd4\u7387\u3002
\u56e0\u6b64Cp\u662f\u8d8a\u5927\u8d8a\u597d\u3002<\/font><\/font><\/strong><\/td>\n<\/tr>\n\n <\/td>\n <\/td>\n<\/tr>\n \n (1)\u898f\u683c\u70ba\u96d9\u908a\u6642<\/font><\/td>\n \n \n <\/td>\n <\/td>\n<\/tr>\n \n (2)\u4e0a\u9650\u898f\u683c\u6642<\/font><\/td>\n C<\/strong>p<\/strong>=(USL<\/strong>-X<\/strong>)\/(3<\/strong>\u03c3<\/strong>p<\/sub><\/strong>)<\/strong>\uff0cUSL\u70ba\u898f\u683c\u4e0a\u9650\uff1bX\u70ba\u7fa4\u9ad4\u4e2d\u5fc3(\u5e73\u5747\u503c)
\u82e5 X>USL\uff0c\u5247Cp=0
\u67d0\u4e9b\u5c3a\u5bf8\u7684\u671f\u671b\u503c\u70ba 0 \u4e4b\u55ae\u908a\u898f\u683c\uff0c\u5982\u5e73\u9762\u5ea6\uff0c\u771f\u5713\u5ea6\uff0c\u540c\u5fc3\u5ea6…\u7b49\u3002\u5176\u898f\u683c\u4e0b\u9650\u70ba 0 \uff0c\u6211\u5011\u53ef\u4ee5\u7528\u5169\u5074\u4e4b\u898f\u683c\u4f86\u8003\u616e\uff0c\u4ea6\u5373
C<\/strong>p<\/strong>=(USL<\/strong>-0<\/strong>)\/(6<\/strong>\u03c3<\/strong>p<\/sub><\/strong>)<\/strong><\/font><\/td>\n<\/tr>\n\n <\/td>\n <\/td>\n<\/tr>\n \n (3)\u4e0b\u9650\u898f\u683c\u6642<\/font><\/td>\n C<\/strong>p<\/strong>=(X-LSL<\/strong>)\/(3<\/strong>\u03c3<\/strong>p<\/sub><\/strong>)<\/strong>\uff0cLSL\u70ba\u898f\u683c\u4e0b\u9650\uff1bX\u70ba\u7fa4\u9ad4\u4e2d\u5fc3(\u5e73\u5747\u503c) <\/font>
\u82e5 X<LSL\uff0c\u5247Cp=0<\/font><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n