1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationCylindrical helical springs made from round wire and bar Guide to methods of specifying and tolerancing hot coiled springs, and cold coiled springs not covered by BS EN 15nullnul
2、lnull, and general spring testingPart 1: Compression springsBS 1nullnullnullnull1nullnullnull1nullBS 1726-1:2010 BRITISH STANDARDnullublishing and copyright informationThe BSI copyright notice displayed in this docnullnullent indicates nullhen the docnullnullent nullas last issnullednullnull BSI 201
3、0ISBN null7null 0 nullnull0 6null2nullnull nullInullS 21null160The nullollonulling BSI renullerences relate to the nullornull on this standard: nullonullnullittee renullerence nullnullnullnullnull Dranullt nullor conullnullent 10nullnull020nullnullnullnull Dnullnullublication historynullirst pnullnu
4、lllished 1nullnull1Second editionnull nullannullary 1null6nullThird editionnull nullay 1nullnull7nullonullrth editionnull Septenullnuller 2002nullinullth nullpresentnull editionnull Nonullenullnuller 2010nullmendments issued since publicationnullate nullenullt affected null BSI 2010 null iBS 1726-1:
5、2010BRITISH STANDARDContentsnullorenullord ii1 Scope 1null Nornullatinulle renullerences 1null Ternullsnull denullnitions and synullnullols 1null Specinullying springs nullor general pnullrposes 25 Tolerances 10nullnnenullesAnnenull A nullinnullornullatinullenull nullethods onull nullerinullcation 1
6、6Binullliography 22nullist of nullguresnullignullre 1 null Data Sheet 1 4nullignullre 2 null Hand onull coiling 5nullignullre null null nullnd coil nullornull 5nullignullre null null nulloil end nullornulled nullronull tapered nullar 6nullignullre null null Data sheet 2 9nullignullre Anull1 null nul
7、leasnullrenullent onull nullree length and parallelisnull 17nullignullre Anull2 null nulleasnullrenullent onull snullnullareness 18nullignullre Anullnull null nulleasnullrenullent onull nullonull 19nullist of tablesTanullle 1 null Synullnullols 2Tanullle 2 null nullalcnulllated tolerances nullor gro
8、nullp A springs nullade nullronull circnulllar section nullaterialnull nullith nullore than nullnullnull and nullenuller than null total coils 14Tanullle null null nullalcnulllated tolerances nullor gronullp B springs nullade nullronull circnulllar section nullaterialnull nullith nullore than nullnu
9、llnull and nullenuller than null total coils 15Summary of pagesThis docnullnullent conullprises a nullront conullernull an inside nullront conullernull pages i to iinull pages 1 to 22null an inside nullacnull conuller and a nullacnull conullernullBS 1726-1:2010ii null null BSI 2010BRITISH STANDARDnu
10、llorewordnullublishing informationThis part onull BS 1726 is pnullnulllished nully BSI and canulle into enullnullect on null0 Nonullenullnuller 2010null It nullas prepared nully Technical nullonullnullittee nullnullnullnullnullnullFastenersnull A list onull organinullations represented on this conul
11、lnullittee can nulle onulltained on renullnullest to its secretarynullSupersessionTogether nullith BS nullN 1nullnull00:200nullnull this part onull BS 1726 snullpersedes BS 1726-1:2002null nullhich is nullithdranullnnullnullelationship with other publicationsBS nullN 1nullnull06-1 nullas pnullnullli
12、shed in 2002 and nullnder the rnullles onull nullnullN the nullnull is onullliged to nullithdranull connullicting standardsnull The 2002 edition onull BS 1726-1 inclnullded those pronullisions onull the prenullionulls edition not inclnullded in the nullN standardnull The pnullnulllication onull BS n
13、ullN 1nullnull00 has pronullpted this renullision onull BS 1726-1 to renullect the rednullced scope onullthis standardnullnullnformation about this documentBS 1726-1 nullas nullrst pnullnulllished in 1nullnull1 and renullised in 1null6null to incorporate nullnullch onull the essential innullornullat
14、ion nullronull ADnull Design Data Sheetsnull nullhich nullere no longer anullailanullle nullronull Hnull Stationery nullnullnullce and nullor nullhich copyright pernullission to repnullnulllish nullas onulltainednull The standard nullas renullised in 1nullnull7 to tanulle acconullnt onull cnullrrent
15、 nullannullnullactnullring processesnullBS 1726 is pnullnulllished in three parts:null Part 1: Compression springsnullnull Part 2: Extension springsnullnull Part 3: Torsion springsnullnullse of this documentBSI pernullits the reprodnullction onull BS 1726-1:2010null nullignullre 1 and nullignullre n
16、ullnullThis reprodnullction is only pernullitted nullhere it is necessary nullor the nullser to record nullndings on the nullgnullres dnullring each application onull the standardnullAs a gnullidenull this part onull BS 1726 tanulles the nullornull onull gnullidance and reconullnullendationsnull It
17、shonullld not nulle nullnulloted as inull it nullere a specinullcation or a code onull practice and clainulls onull conullpliance cannot nulle nullade to itnullnullresentational conventionsThe gnullidance in this standard is presented in ronullan nullinullenull nullprightnull typenullAny reconullnul
18、lendations are enullpressed in sentences in nullhich the principal anullnulliliary nullernull is nullshonullldnullnullCommentary, explanation annull general innullormatinulle material is presentenullin smaller italinull type, annull nulloes not nullonstitnullte a normatinulle elementnullContractual
19、and legal considerationsThis pnullnulllication does not pnullrport to inclnullde all the necessary pronullisions onull a contractnull nullsers are responsinullle nullor its correct applicationnullCompliance with a British Standard cannot confer immunity from legal obligationsnullnull BSI 2010 null 1
20、BS 1726-1:2010BRITISH STANDARD1 ScopeThis part onull BS 1726 pronullides gnullidance on nullethods onull specinullying and tolerancing hot coiled conullpression springsnull and cold coiled springs that nullall onulltside the sinulle range linullits specinulled in BS nullN 1nullnull00null In addition
21、nullthis standard inclnulldes in Annenull A the general testing nullethods nullor parallel sided helical conullpression springs that are applicanullle to nulloth hot and cold coiled springs nullannullnullactnullred nullronull circnulllar section nullaterialnullTnullo grades onull tolerancenull 1 and
22、 2null are ginullen nullor hot coiled circnulllar section springsnull or cold coiled springs that nullall onulltside the sinulle ranges specinulled in BS nullN 1nullnull00nullThree types onull end coils are pronullided nullornull inullenull open endnull closed endnulland closed and gronullnd endnull
23、 the last onull these nulleing applicanullle only to springs nullhere the dianulleter or anullial dinullension onull nullaterial is 0nullnull nullnullor greaternullThis part onull BS 1726 dinullnullerentiates nulletnulleen springs that hanulle or hanulle not nulleen stress relienulled anullter nullo
24、rnulling nulldesignated gronullp Anullnull and springsnull the nullaterial onull nullhich has nullndergone a strnullctnullral change nully heat treatnullent anullter nullornulling nulldesignated gronullp BnullnullThis standard ginulles tnullo nullethods onull specinullying springs nullor general pnu
25、llrposes and one nullethod onull testing springsnullnull Normative referencesThe nullollonulling renullerenced docnullnullents are indispensanullle nullor the application onull this docnullnullentnull nullor dated renullerencesnull only the edition cited appliesnull nullor nullndated renullerencesnu
26、ll the latest edition onull the renullerenced docnullnullent appliesnullBS nullN 1nullnull06-1null Cylinnullrinullal nullelinullal springs manulle nullrom ronullnnull nullire annullnullar null Calnullnulllation annull nullesign null Part 1: Compression springsBS nullN 1nullnull00null Cylinnullrinull
27、al nullelinullal springs manulle onull ronullnnull nullire null nullnullality spenullinullnullations nullor nullolnull nulloilenull nullompression springsBS nullN ISnull 26null0nullnull nullprings null nullonullanullnulllarynull nullerms, denullnitions and symbolsnullnull1 nullerms and denullnitions
28、nullor the pnullrposes onull this part onull BS 1726null the ternulls and denullnitions ginullen in BS nullN ISnull 26null0null and the nullollonulling applynullnullnull1null1 edge dressingrenullonullal onull nullaterial nullronull the onulltside edge onull the end coils nullhere they protrnullde nu
29、lleyond the onulltside dianulleter onull the springnullnull1nullnull group null springssprings nullith nullaterial that has not nullndergone a strnullctnullral change nully heat treatnullent anullter nullornulling nullnullTE Tnullis may innulllnullnulle nullotnull springs tnullat nullanulle nulleen
30、stress relienullenull annulltnullose tnullat nullanulle notnullBS 1726-1:20102 null null BSI 2010BRITISH STANDARDnullnull1nullnull group B springsspringsnull the nullaterial onull nullhich has nullndergone a strnullctnullral change nully heat treatnullent anullter nullornullingnullnull1nullnull safe
31、 denullectionnullanullinullnullnull denullection that can nulle applied to a spring nullithonullt enullceeding the elastic linullit onull the nullaterialnullnullnull Symbolsnullor the pnullrposes onull this part onull BS 1726-1null the synullnullols in Tanullle 1 applynullTanullle 1 SymbolsSymbol nu
32、llerm nullnitnull spring indenull nullnull nullean coil dianulleter nullnullnulloonulltside dianulleter onull spring nullnullnullHnull nullinnullininullnullnull dianulleter onull pocnullet into nullhich spring has to nullt nullnullnulliinside dianulleter onull spring nullnullnullsnull nullanullnulla
33、nullinullnullnull dianulleter onull spigot onuller nullhich spring has to nullt nullnullnull nullaterial dianulleter nullnullnullnullanullnullanullinullnullnull nullaterial dianulleter allonulling nullor nullaterial dianulleter tolerance nullnullF spring nullorce NFstheoretical solid nullorce Nnull
34、spring length nullnullnullonullree length onull spring nullnullnullstheoretical solid length onull spring nullnullnullsnull nullanullnullanullinullnullnull allonullanullle solid length onull spring nullnulln nnullnullnuller onull actinulle coils in spring nullnull total nnullnullnuller onull coils i
35、n spring nullnulliinside radinulls to clear on spring seat nullnullnulloonulltside radinulls to clear on spring seat nullnullnull spring rate Nnullnullnull denullection nullronull nonullinal nullree length to loaded length nullnull shear stress in spring Nnullnullnull2stheoretical solid stress in sp
36、ring Nnullnullnull2 seating coenullnullcient nullnull Specifying springs for general purposesnullnull1 nullntroductionThere are tnullo nullethods nully nullhich a cnullstonuller nullay specinully a springnull In the nullrst nullethod the cnullstonuller presents the snullpplier nullith a conullplete
37、design and indicates nullhat nullannullnullactnullring processesnull snullch as stress relienullingnull prestressing and shot peeningnull shonullld nulle carried onulltnull In this case the innullornullation shonullld nulle snullpplied on Data Sheet 1 nullnullignullre 1nullnullnull BSI 2010 null nul
38、lBS 1726-1:2010BRITISH STANDARDnullhen the cnullstonuller does not hanulle the innullornullation to conullplete Data Sheet 1null the cnullstonuller shonullld conullplete Data Sheet 2 nullnullignullre nullnullnull This is an application nullor spring design in nullhich the cnullstonuller shonullld sp
39、ecinully the renullnullirenullents nullronull an operational point onull nullienullnull ginulling snullch innullornullation as dinullensional constraintsnull nullorcenulllength paranulletersnullnullatignulle linulle and resistance to corrosionnull in order that the snullpplier can prodnullce a sprin
40、g design to nulleet these renullnullirenullentsnullnullhen the spring snullpplier has prepared a design nullronull the innullornullation on Data Sheet 2null the spring snullpplier shonullld conullplete Data Sheet 1 and snullnullnullit it to the cnullstonuller nullor appronullalnullnullnullnull nulle
41、thod one nullcustomer designnull using nullata Sheet 1nullnullnullnull1 GeneralIt is not necessary to prepare a detailed scale dranulling nullor a helical conullpression springnull details shonullld nulle specinulled on Data Sheet 1 nullnullignullre 1nullnull nullnly essential dinullensions and prop
42、erties nullor nullhich the spring is to nulle inspected need nulle tolerancednull other nulleatnullres nulleing ginullen in the design nullor innullornullation onlynullIn conullpleting the Data Sheetnull nullsers shonullld:anull specinully only those particnulllars nullhich are onull nullnullnctiona
43、l inullportance nully nullarnulling the appropriate snullnullares in nullonulles 1null nullnull nullnull 6null 7null nullnull nullnull 10 and 12 onull Data Sheet 1nullnullnull anulloid rednullndant dinullensioningnullcnull conullply nullith BS nullN 1nullnull06-1 nullor the nullethod onull calcnulll
44、ation nullsed to deternulline nullalnulles nullor ratenull nullorcenull stress and nullanullinullnullnull solid lengthnulldnull attach nullnullrther details on a separate sheet and dranull attention to this nullact in the relenullant nullonull on the nullornull inull space is insnullnullnullcient in
45、 any nullonullnullnullnullnullnullnull nullaterialBonull 1 nullnullignullre 1null shonullld nulle conullpleted nully ginulling the nullaterial type and conullplete specinullcation codenull nullnulloting the relenullant British Standard nullhere possinulllenull the section shape and its dinullensions
46、 and the heat treatnullent detailsnull enullgnull anullstenullpernull harden and tenullpernull inclnullding the hardness renullnullirednull inull relenullantnullnullnullnullnullnull nullirection of coilingThe direction onull coiling is rarely inullportant nullor the spring nullnullnction and nullnle
47、ss it is inclnullded in nullonull 2null it is assnullnulled that the snullpplier is nullree to coil either handnullnullignullre 2 shonulls the generally accepted connullention nullor denullning hand onullcoilingnull A sinullple practical nullethod onull deternullining the hand onull a spring is as n
48、ullollonullsnullHold the spring at eye lenullel and loonull thronullgh it along its nullanullor anullisnullRotate the spring anullonullt this anullis nullntil the nullisinullle cnullt end is at the nullottonullnullInull the cnullt end nonull points to the lenulltnull it is a lenullt-hand coiled spri
49、ngnullBS 1726-1:2010null null null BSI 2010BRITISH STANDARDnullignullre 1 nullata Sheet 1SnullECnullnullnullCnullnullnullnullN nullnullnull nullEnullnullCnullnull CnullnullnullnullESSnullnullN SnullnullnullNGBS 1nullnullnullnull1nullnullnull1null nullnullnullnull SnullEEnull 1nullart Serial Nonull nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullhis form should be completed with reference to BS 1nullnullnullnull1nullnullnull1null, nullnullnullnullnullor nonullenclatnullrenull see BS 1726-1:2010null nulllanullse nullnullnull nulleat stabilinullationNo nullesRelan
