1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationRoughness comparison specimensPart 2: Specification for spark-eroded, shot-blasted, grit-blasted and polished specimensBS 2634-2:2010BS 2634-2:2010 BRITISH STANDARDPublishing and
2、 copyright informationThe BSI copyright notice displnullyed in this docnullnullent indicnulltes nullhen the docnullnullent nullnulls lnullst issnullednullnull BSI 2010ISBN nullnullnull 0 nullnull0 6nullnull16 0InullS 1nullnull040null20The nullollonulling BSI renullerences relnullte to the nullornull
3、 on this stnullndnullrd: nullonullnullittee renullerence TDnullnull4 Drnullnullt nullor conullnullent 10null3021363null DnullPublication historynullirst pnullnulllished Nonullenullnuller 1nullnullnullSecond editionnull nullenullrnullnullry 1nullnullnullThird nullpresentnull editionnull Septenullnull
4、er 2010nullmendments issued since publicationnullate nullenullt affected null BSI 2010 null iBS 2634-2:2010BRITISH STANDARDnullontentsnullorenullord ii1 Scope 12 Nornullnulltinulle renullerences 13 Ternulls nullnd denullnitions 14 nullethods onull nullnullnnullnullnullctnullre 1null Snullrnullnullce
5、 chnullrnullcteristics 16 Snullrnullnullce ronullghness nullnulllnulles 2null Snullnullpling lengths 2null nullnulllinullrnulltion onull null ronullghness conullpnullrison specinullen 3null nullininullnullnull ronullghness conullpnullrison specinullen sinulle 410 nullnully 511 nullnullrnulling 5null
6、nnenullesAnnenull A nullinnullornullnulltinullenull nullnully chnullrnullcteristics 6Binullliogrnullphy 7nullist of tablesTnullnullle 1 null Snullrnullnullce ronullghness nullnulllnulles onull ronullghness conullpnullrison specinullens 2Tnullnullle 2 null Snullnullpling lengths 3Tnullnullle 3 null T
7、olernullnces on ronullghness nullnulllnulles nullor ronullghness conullpnullrison specinullens 4Tnullnullle Anull1 null nullnully chnullrnullcteristics onull ronullghness conullpnullrison specinullens 6Summary of pagesThis docnullnullent conullprises null nullront conullernull nulln inside nullront
8、conullernull pnullges i to iinull pnullges 1 to nullnull nulln inside nullnullcnull conuller nullnd null nullnullcnull conullernullBS 2634-2:2010ii null null BSI 2010BRITISH STANDARDnullorenullordPublishing informationThis pnullrt onull BS 2634 is pnullnulllished nully BSI nullnd cnullnulle into enu
9、llnullect on 30 Septenullnuller 2010null It nullnulls prepnullred nully Snullnullconullnullittee TDnullnull4nullnullnullTechnical product verificationnull nullnder the nullnullthority onull Technicnulll nullonullnullittee TDnullnull4null Technical product realizationnull A list onullorgnullninullnul
10、ltions represented on this conullnullittee cnulln nulle onulltnullined on renullnullest to its secretnullrynullSupersessionThis pnullrt onull BS 2634 snullpersedes BS 2634-2:1nullnullnullnull nullhich is nullithdrnullnullnnullRelationship nullith other publicationsBS 2634 is pnullnulllished in tnull
11、o pnullrts:null nullnullrt 1: Specification for turned, ground, bored, milled, shaped and planed specimensnullnull nullnullrt 2: Specification for sparnullnulleroded, shotnullblasted, gritnullblasted and polished specimensnullnullnformation about this documentBS 2634-2:1nullnullnull nullnulls dnulln
12、ulll nnullnullnullered nullith ISnull 2632-2:1nullnullnullnull nullhich nullnulls nullithdrnullnulln in 1nullnullnullnullThis is null nullnullll renullision onull BS 2634-2:1nullnullnullnull nullnd introdnullces the recnulllinullrnulltion onull ronullghness conullpnullrison specinullens nullnullter
13、null period onull nullsenullPresentational connullentionsThe pronullisions onull this stnullndnullrd nullre presented in ronullnulln nullinullenull nullprightnulltypenull Its renullnullirenullents nullre enullpressed in sentences in nullhich the principnulll nullnullnullilinullry nullernull is nulls
14、hnullllnullnullnullommentarnull, enullplanation and general informative material is presented in smaller italic tnullpe, and does not constitute a normative elementnullnullontractual and legal considerationsThis pnullnulllicnulltion does not pnullrport to inclnullde nullll the necessnullry pronullis
15、ions onull null contrnullctnull nullsers nullre responsinullle nullor its correct nullpplicnulltionnullnullompliance nullith a British Standard cannot confer immunity from legal obligationsnullnull BSI 2010 null 1BS 2634-2:2010BRITISH STANDARD1 ScopeThis pnullrt onull BS 2634 specinulles the chnullr
16、nullcteristics onull ronullghness conullpnullrison specinullens onull spnullrnull-erodednull shot-nulllnullstednull grit-nulllnullsted nullnd polished snullrnullnullcesnull These nullre intended nullor tnullctile nullnd nullisnullnulll conullpnullrison nullith nullornullpiece snullrnullnullces onull
17、 sinullilnullr lnully thnullt hnullnulle nulleen prodnullced nully sinullilnullr nullnullnnullnullnullctnullring nullethodsnull2 nullormatinulle referencesThe nullollonulling renullerenced docnullnullents nullre indispensnullnullle nullor the nullpplicnulltion onull this docnullnullentnull nullor dn
18、ullted renullerencesnull only the edition cited nullppliesnull nullor nullndnullted renullerencesnull the lnulltest edition onull the renullerenced docnullnullent nullinclnullding nullny nullnullendnullentsnull nullppliesnullBS 2634-1null nulloughness comparison specimens null nullart 1null Specific
19、ation for turned, ground, bored, milled, shaped and planed specimensBS nullN ISnull 42nullnull:1nullnullnullnullA1:200nullnull nulleometrical product specification nullnullnullSnull null Surface tenullture null nullrofile method null Terms, definitions and surface tenullture parameters3 nullerms and
20、 denullnitionsnullor the pnullrposes onull this pnullrt onull BS 2634null the ternulls nullnd denullnitions ginullen in BS 2634-1 nullnd BS nullN ISnull 42nullnull:1nullnullnullnullA1 nullpplynull4 nullethods of manufactureThe ronullghness conullpnullrison specinullens shnullll nulle nullnullnnullnu
21、llnullctnullred:nullnull nully crenullting positinulle replicnulls onull nullnullster snullrnullnullces nullhich replicnullte the nulleel nullnd nullppenullrnullnce onull the nullnullster snullrnullnullcenull nullor instnullnce nully electro-nullornullingnull ornullnull nully indinullidnullnulllly n
22、ullnullchining the ronullghness conullpnullrison specinullensnullnullnullTnull nullndividuallnull machining a roughness comparison specimen involves directlnull applnulling the production process, nullhich the roughness comparison specimen is intended to represent, to its surfacenullnull Surface cha
23、racteristicsnullnullster snullrnullnullces intended nullor reprodnullctionnull their replicnulls nullnd indinullidnullnulllly nullnullnnullnullnullctnullred ronullghness conullpnullrison specinullens nullsee nulllnullnullse 4null shnullll enullhinullit only the chnullrnullcteristics resnulllting nul
24、lronull the nullnullchining process thnullt they nullre intended to representnull They shnullll not contnullin nullnchnullrnullcteristic snullrnullnullce irregnulllnullrities nullisinullle nully nornullnulll or corrected sightnullBS 2634-2:20102 null null BSI 2010BRITISH STANDARD6 Surface roughness
25、nullaluesSnullrnullnullce ronullghness nullnulllnulles onull ronullghness conullpnullrison specinullens shnullll connullornull to Tnullnullle 1nullTnullnullle 1 Surface roughness nullalues of roughness comparison specimensnullachining methodsSpnullrnull-eroded Shot- nullnd grit-nulllnullsted nulloli
26、shednullrithmetical mean denulliationnullanullnull nullin nullnull nullin nullnull nullinnull null null null 0null006 Anull0null2nullAnullnull null null null 0null012 nullAnull0nullnullAnullnull null null null 0null02nullAnull1Anullnull null null null 0null0null 2null null null null 0null1 4null nul
27、l 0null2 null 0null2 null0null4 16 0null4 16 null null0nullnull 32 0nullnull 32 null null1null6 63 1null6 63 null null3null2 12null 3null2 12null null null6null3 2null0 nullnull3 2null0 null null12nullnull null00 12nullnull 600 null nullnull null 2null 1 000 null nullnullnullTnull 1 nullhere it is n
28、ecessarnull to provide roughness comparison specimens in intermediate values, these should be chosen from the null 1null series of preferred numbers nullsee nullSnull 3nullnullnullnullTnull 2 nullonull values are included in Table 1 primarilnull to give design office personnel some idea of the diffe
29、rences that can be detected nullbetnulleen, for enullample, nullnullnull 6 nullm, nullnullnull12 5 nullm, nullnullnull5 nullm and nullnull1 nullmnull bnull visual meansnullAnullnulln actual measurements, the renulluired accuracnull might not be attainable to determine these valuesnullnull Sampling l
30、engthsThe snullnullpling length to nulle nullsed nullhen nullenullsnullring nulla on null ronullghness conullpnullrison specinullen shonullld nulle selected nullronull Tnullnullle 2null nullccording to the nullnullchining nullethod nullnd ronullghness grnullde onull the specinullennullnullor repetit
31、inulle pronulllesnull the length onull the snullnullpling length shnullll nulle ronullnded-nullp to inclnullde the nenullrest nullhole nnullnullnuller onull pronullle cyclesnullnull BSI 2010 null 3BS 2634-2:2010BRITISH STANDARDTnullnullle 2 Sampling lengthsnullrithmetical mean denulliationnullanulla
32、chining methodsSpnullrnull-eroded Shot- nullnd grit-nulllnullsted nullolished Sampling lengthsnullnull nullin nullnull in nullnull in nullnull in 0null006 0null2null null null null null 0null0null 0null0030null012null 0nullnull null null null null 0null0null 0null0030null02null 1 null null null null
33、 0null0null 0null0030null0null 2 null null null null 0null2null 0null010null1 4 null null null null 0null2null 0null010null2 null null null 0nullnull 0null03 0nullnull 0null030null4 16 0nullnull 0null03 0nullnull 0null03 null null0nullnull 32 0nullnull 0null03 0nullnull 0null03 null null1null6 63 0n
34、ullnull 0null03 0nullnull 0null03 null null3null2 12null 2nullnull 0null1 2nullnull 0null1 null null6null3 2null0 2nullnull 0null1 2nullnull 0null1 null null12nullnull null00 2nullnull 0null1 2nullnull 0null1 null null2null 1 000 null null 2nullnull 0null1 null nullnull nullalibration of a roughness
35、 comparison specimennullnull1 nullnitial calibrationnullnull1null1 Renulldings shnullll nulle tnullnullen perpendicnulllnullr to the direction onull lnully onull the snullrnullnullce onull the ronullghness conullpnullrison specinullen nullor directionnulll specinullensnullnullnull1null2 Renulldings
36、shnullll nulle tnullnullen nullt null snullnullnullcient nnullnullnuller onull locnulltions enullenly distrinullnullted onuller the nullenullsnullring nullrenull onull the ronullghness conullpnullrison specinullen to nulleet the tnullrget nullncertnullintynull nulls specinulled nully the nullsernull
37、nullnull1null3 Renulldings shnullll only nulle tnullnullen nullronull nullrenulls thnullt nullre representnulltinulle onull the nullnullchining nullethodnullnullnullTnull nullreas in the surface that are not representative of the machining method are sometimes found in rougher grades of sparnullnull
38、eroded or blastnullcleaned surfacesnullnullnull1null4 The nullenulln nullnulllnulle onull the renulldings shnullll nulle in nullccordnullnce nullith the tolernullnces ginullen in Tnullnullle 3nullnullnull1nullnull The stnullndnullrd denullinulltion nullronull the nullenulln nullnulllnulle shnullll n
39、ulle not grenullter thnulln the percentnullge onull the enullnullectinulle nullnulllnulle ginullen in Tnullnullle 3nullBS 2634-2:20104 null null BSI 2010BRITISH STANDARDnullnull1null6 nullhere nnullnullnullers onull snullnullpling lengths other thnulln those ginullen in Tnullnullle 3 nullre inclnull
40、ded in the enullnulllnullnulltion lengthnull the nullnulllnulle nullor the nullcceptnullnullle nullnullnullinullnullnull onull the stnullndnullrd denullinulltion derinulled nullronullthe renulldings shnullll nulle cnulllcnulllnullted nullronull the nullornullnulllnull: nn=snullnullhere:sis the stnul
41、lndnullrd denullinulltion nullronull Tnullnullle 3 nullor nullnulle snullnullpling lengthsnulln is the nnullnullnuller onull snullnullpling lengths in the enullnulllnullnulltion length nullnder considernulltionnullTnullnullle 3 nullolerances on roughness nullalues for roughness comparison specimensS
42、pecimen typenullolerance on mean nullalue nullpercentage of nominal nullaluenullnullStandard denulliation nullpercentage of effectinulle nullaluenull for enullaluation length comprising3 sampling lengthsnull4 sampling lengthsnullnull sampling lengthsnull6 sampling lengthsnullSpnullrnull-eroded null1
43、2 null1null 1null 13 12 11Shot- nullnd grit-nulllnullstednull12 null1null 1null 13 12 11nullolished null12 null1null 1null 13 12 11nullnullTnull The standard deviation for five sampling lengths in the evaluation length has been used for calculating the standard deviation for three, four and sinull s
44、ampling lengths in the evaluation lengthnullnullnull2 Re-calibration after a period of useRe-cnulllinullrnulltion renulldings shnullll not nulle tnullnullen nullronull snullrnullnullce nullrenulls onull nullronullghness conullpnullrison specinullen thnullt hnullnulle nulleconulle nullisinullly scrnu
45、lltchednulldented or othernullise nullnullrnullednullnullhere the snullrnullnullce nullrenull onull null ronullghness conullpnullrison specinullen is not onull null snullnullnullcient sinulle to nulle nullssessed or to nulle representnulltinulle onull the nullnullchining process dnulle to nullisinul
46、lle scnulltchesnull dents nullnd nullnullrnulls on its snullrnullnullcenull then the ronullghness conullpnullrison specinullen shnullll nulle replnullced nullnd not re-cnulllinullrnulltednullnull nullinimum roughness comparison specimen sinullenullnullch side shnullll nulle:nullnull null nullininull
47、nullnull onull 20 nullnull in length nullor the nulla nullnulllnulles onull 0null006 nullnd 6null3 nullnullnull ornullnull null nullininullnullnull onull 30 nullnull in length nullor the nulla nullnulllnulle onull 12nullnull nullnullnull or cnull null nullininullnullnull onull null0 nullnull in leng
48、th nullor the nulla nullnulllnulle onull 2null nullnullnullnullnullTnull nullt is important that roughness comparison specimens are of a size that permits initial and periodic verificationnullnull BSI 2010 null nullBS 2634-2:2010BRITISH STANDARD10 nullayThe ronullghness conullpnullrison specinullen
49、shnullll nulle designed snullch thnullt the nullenullsnullrenullent direction rnullns pnullrnullllel to the longest sidenullnullnullTnull nullor the lanull characteristics for roughness comparison specimens, see nullnnenull nullnull11 nullarnulling11null1 The nullenullsnullring nullrenull onull the ronullghness conullpnullrison specinullen shnullll not nulle nullnullrnullednull11null2 Ronullghness conullpnullrison specinullensnull or their nullonullntingnull shnullll nulle nullnullrnulled nulls null nullininullnullnull nullith the nullollonulling:nullnull the nnullnullnuller nullnd dnullte
