Product Code:SAE J49
Title:Specification Definitions--Hydraulic Backhoes
Issuing Committee:Mtc1, Loaders, Crawlers, Scrapers And Mounted Attachments
Scope: The purpose of this standard is to establish a uniform method of providing dimensional operational specifications for hydraulic backhoes. This standard includes the definitions of specification most commonly used to describe nonfull-rotating hydraulic backhoes. Dimensional and operational specifications are to be determined without assembly or equipment changes such as buckets, dippersticks, etc. When specifications are affected by adjustable or extendable members, the position must be specified. Paragraphs 4.2.1-6.2 are further defined by Figs. 1-8. Figs 1-8 are not intended to be descriptive of any existing machine and are used only to clarify the meaning of the standard.
Rationale: The purpose of this standard is to establish a uniform method of providing dimensional operational specifications for hydraulic backhoes. This standard includes the definitions of specification most commonly used to describe nonfull-rotating hydraulic backhoes. Dimensional and operational specifications are to be determined without assembly or equipment changes such as buckets, dippersticks, etc. When specifications are affected by adjustable or extendable members, the position must be specified. Paragraphs 4.2.1-6.2 are further defined by Figs. 1-8. Figs 1-8 are not intended to be descriptive of any existing machine and are used only to clarify the meaning of the standard.【英文标准名称】:StandardTestMethodforCompressibilityandRecoveryofLaminatedCompositeGasketMaterials
【原文标准名称】:叠层复合衬垫材料的可压缩性和复原性标准测试方法
【标准号】:ASTMF806-1999a(2003)e1
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:F03.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:密封件;密封;试验;休闲活动;密封材料;压缩性
【英文主题词】:compressibility;gasketmaterialcomposites;gasketmateriallaminates;recovery
【摘要】:Thistestmethodisdesignedtocomparerelatedlaminatedcompositegasketmaterialsundercontrolledconditionsandtheirshort-timecompressibilityandrecoveryatroomtemperature.Itmeasurescompressibilitywithamatchedpairofopposingupperandlowerpenetratorswhichprovidebetterprecisionandbiasthanmethodsusinganupperpenetratorandaloweranvil.Itisdifficulttoprepareundistortedtestspecimensfromlaminatedcompositegasketmaterialswhichwilllayflatonananvil.Also,withmanycompositeshavingrigidinnerlayerstheloadontheupperpenetratorisdistributedoverthebottomanvilarearesultinginalowerthanactualcompressibilityreading.Thistestmethodmaybeusedasaroutinetestmethodwhenagreeduponbetweenthepurchaserandtheproducer.1.1Thistestmethodcoversdeterminationoftheshort-timecompressibilityandrecoveryatroomtemperatureoflaminatedcompositegasketmaterials.1.2Thistestmethodisnotintendedasatestforcompressibilityunderprolongedstressapplication,thatis"creep,"orforrecoveryfollowingsuchprolongedstressapplication,theinverseofwhichisgenerallyreferredtoas"compressionset."Also,itisonlyintendedfortestsatroomtemperature.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:21_140
【页数】:3P.;A4
【正文语种】: