QJ 1771.1-1989 短柄机、手用丝锥 D=1～52mm
作者:标准资料网 时间:2024-05-11 14:39:47 浏览:8574
来源:标准资料网
基本信息
| 标准名称： | 短柄机、手用丝锥 D=1～52mm |
| 中标分类： |
航空、航天 >>
航空器与航天器制造用设备 >>
刀具 |
| ICS分类： |
机械制造 >>
切削工具 >>
丝锥和板牙
|
| 替代情况： | QJ 141-74 QJ 142-74 |
| 发布日期： | 1989-03-08 |
| 实施日期： | 1989-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 20页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 航空 航天 航空器与航天器制造用设备 刀具 机械制造 切削工具 丝锥和板牙
MIL-P-514D, MILITARY SPECIFICATION, PLATE, IDENTIFICATION, INSTRUCTION AND MARKING, BLANK (15 SEP 1966) [S/S BY A-A-50271]., This specification covers identification plates, instruction plates, and marking plates for attachment to U.S. Militaryproperty.【英文标准名称】:StandardPracticeforEnclosedCarbon-ArcExposuresofPlastics
【原文标准名称】:塑料的闭合碳弧曝光标准实施规范
【标准号】:ASTMD6360-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.50
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:降解;电弧;曝光;塑料;紫外线
【英文主题词】:carbon-arc;degradation;enclosedcarbon-arc;exposure;lightexposure;ultraviolet
【摘要】:Theabilityofaplasticmaterialtoresistdeteriorationofitselectrical,mechanical,andopticalpropertiescausedbyexposuretolight,heat,andwatercanbeverysignificantformanyapplications.Thispracticeisintendedtoinducepropertychangesassociatedwithend-useconditions,includingtheeffectsofsunlight,moisture,andheat.Theexposureusedinthispracticeisnotintendedtosimulatethedeteriorationcausedbylocalizedweatherphenomenasuchasatmosphericpollution,biologicalattack,andsaltwaterexposure.(Warning8212;Variationinresultsmaybeexpectedwhenoperatingconditionsarevariedwithintheacceptedlimitsofthispractice;therefore,noreferencetotheuseofthispracticeshallbemadeunlessaccompaniedbyareportpreparedinaccordancewithSection9thatdescribesthespecificoperatingconditionsused.RefertoPracticeG151fordetailedinformationonthecaveatsapplicabletouseofresultsobtainedinaccordancewiththispractice.)Note28212;Additionalinformationonsourcesofvariabilityandonstrategiesforaddressingvariabilityinthedesign,execution,anddataanalysisoflaboratory-acceleratedexposuretestsisfoundinGuideG141.Reproducibilityoftestresultsbetweenlaboratorieshasbeenshowntobegoodwhenthestabilityofmaterialsisevaluatedintermsofperformancerankingcomparedtoothermaterialsortoacontrol;therefore,exposureofasimilarmaterialofknownperformance(acontrol)atthesametimeasthetestmaterialsisstronglyrecommended.3,4Itisrecommendedthatatleastthreereplicatesofeachmaterialbeexposedtoallowforstatisticalevaluationofresults.TestresultswilldependuponthecarethatistakentooperatetheequipmentinaccordancewithPracticeG153.Significantfactorsincluderegulationoflinevoltage,freedomfromsaltorotherdepositsfromwater,temperatureandhumiditycontrol,andconditionsoftheelectrodes.1.1Thispracticecoversspecificproceduresandtestconditionsthatareapplicableforexposureofplasticsinenclosedcarbon-arcdevicesconductedinaccordancewithPracticesG151andG153.Thispracticealsocoversthepreparationoftestspecimens,thetestconditionssuitedforplastics,andtheevaluationoftestresults.1.2Thispracticedoesnotcoverfilteredopen-flamecarbon-arcexposuresofplastics,whicharecoveredinPracticeD1499.PracticeD5031describesenclosedcarbon-arcexposuresofpaintsandrelatedcoatings.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1ThereisnoknownISOequivalenttothispractice.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:4P.;A4
【正文语种】:
