如何判断钢丝绳是否应该报废上课讲义.doc

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1、精品好文档，推荐学习交流班组安全学习资料：如何判断钢丝绳是否应该报废判断钢丝绳是继续使用还是报废，主要依据钢绳断丝程度和一些其它条件。报废标准如下：（1）钢丝绳在一个捻节距内断丝数达钢丝绳总丝数的10％。如绳6×19＝114丝，当断丝数达12丝时即应报废更新，如绳6×37＝222丝，当断丝数达22丝时即应报废更新。对于由粗细丝组成的钢丝绳，断丝数的计算是细丝一根算一根，粗丝一根算1．7根。（2）钢丝径向磨损或腐蚀量超过原直径的40％则应报废，当不到40％时，可按规定折减断丝数报废。（3）吊运炽热金属或危险品的钢丝绳的报废丝数，取一般起重机用钢丝绳报废标准的

2、一半数（4）对于符合ISO2408（一般用途钢丝绳特性》标准所规定的结构钢丝绳，报废的断丝数应按GB5972—86中规定数执行。（5）整条绳股断裂应报废。（6）当钢丝绳直径相对于公称直径减小7%或更多时，即使未发现断丝，该钢丝绳也应报废。（7）麻芯外露应报废。（8）钢丝绳有明显的腐蚀应报废。（9）局部外层钢丝伸长呈笼型状态应报废（10）对照GB5972一86中钢丝绳可能出现的典型示例，与图中损坏相同者应报废。 ChineseEducationVersusAmericanEducation仅供学习与交流，如有侵权请联系网站删除谢谢2精品好文档，推荐学习交流A

3、sweknow,thereareagreatmanydifferencesbetweencultureoftheEastandWest.BecauseIcan'tlistallofthedifferentaspect,IwilltakethedifferencesofteachingsysteminChinaandAmericaforexample.Firstofall,inChina,inthesameschool,classesaredividedtothekeyclassandordinaryclass.Thepurposeistofocusonst

4、udentsinkeyclasses.Thelogicisthattomaximizetheuselimitedresourcestoimprovetheirenrollmentrate.IntheUnitedStates,thereisnodistinctionbetweenclasses.Thosestudentswhohavestrongabilitycanchoosemoredifficultlesson;theabilityinferiorcanchoosemorebasiccourses.Theschoolregularlydoesacompr

5、ehensivesummarytoeachstudentandtakesremedialmeasuresforthestudentswhohavepoorperformance.What'smore,Chinesestudentsalwayscomplainabouttheirhomeworkbecausetoomuchhomeworkhaslimitedthetimetoexerciseandrelax.Theyhavetorecitemanythingsastogetahighmark.Homeworkcomesthefirsttothem.Howev

6、er,thestudyinAmericaismoreinteresting.Teacherspayattentiontotrainingstudents'skillsinthinkingtherealisticliferatherthanemphasisontheimportanceofmemories.Inaddition,therateofgoingtoschool,thetuition,andthejobofgraduatesarequitedifferent,too.Fromwhathasbeenmentionedabove,wecandrawth

7、econclusionthatalthoughtwocountriesbothattachgreatimportancetoeducation,仅供学习与交流，如有侵权请联系网站删除谢谢2