1、ASME B29.22-2001(Revision of ASME B29.22M-1995)DROP FORGED RIVETLESSCHAINS, SPROCKET TEETHDRIVE CHAIN/DRIVE DOGSAN AMERICAN NATIONAL STANDARDAN AMERICAN NATIONAL STANDARDDROP FORGED RIVETLESSCHAINS, SPROCKET TEETHDRIVE CHAIN/DRIVE DOGSASME B29.22-2001(Revision of ASME B29.22M-1995)Date of Issuance:
2、July 1, 2002This Standard will be revised when the Society approves the issuance of anew edition. There will be no addenda issued to this Edition.ASME will issue written replies to inquiries concerning interpretations oftechnical aspects of this Standard.ASME is the registered trademark of The Ameri
3、can Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have ha
4、d anopportunity to participate. The proposed code or standard was made available for public reviewand comment which provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, constru
5、ction, proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable le
6、tters patent, nor assumeany such liability. Users of a code or standard are expressly advised that determination of thevalidity of any such rights, and the risk of infringement of such rights, is entirely their ownresponsibility.Participation by federal agency representative(s) or person(s) affiliat
7、ed with industry is not tobe interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued inaccordance with established the ASME procedures and policies, which precludes the issuanceof interpretations by
8、 individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2002 byTHE AMERICAN SOCIETY OF MECH
9、ANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster vCorrespondence with B29 Committee . vi1 Introduction 12 Definitions 13 Minimum Ultimate Tensile Strength . 24 Measuring Load 25 Strand Length Tolerance . 26 Dimensions for Chain Links 27 Finish . 28 Numbering Sy
10、stem . 29 Chain Assembly 210 Sprockets . 211 Drive 312 Drive Dogs 3Figures1 Pin 12 Regular Drop Forged Rivetless Chain 13 X-Type Drop Forged Rivetless Chain 24 X-Type Chain 25 Chain Assembly 36 Sprocket Tooth Form A 97 Sprocket Tooth Form B 108 Drive 119 X 348 and 348 Dog 1110 X 458 and 458 Dog 1211
11、 X 678 and 678 Dog . 1212 X 100-16 and 100-16 Dog 1313 X 75-13 and 75-13 Dog 1314 X 150-22 and 150-22 Dog 14Tables1 Maximum and Minimum Strand Tolerances 42 Regular Drop Forged Rivetless Chain 53 X-Type Drop Forged Rivetless Chain 64 Modified X-Type Drop Forged Rivetless Chain . 75 Sprockets: Maximu
12、m Eccentricity and Face Runout at Root Diameter . 76 Sprocket Factors 87 Sprocket Tooth Form . 8iiiFOREWORDA subcommittee was appointed by the ANSI B29 Committee in September of 1978 toestablish an interchangeability standard for Drop Forged Rivetless Chains. The terminologyof this chain series was
13、established many years ago and has become generic for thisreferenced chain.As in all other B29 chain standards, no attempt is made to establish absolute engineeringcharacteristics or tolerances where interchangeability is not involved.Other materials and methods have been used to manufacture the riv
14、etless chain. However,this standard is promulgated for the Drop Forged type of heat-treated medium carbon steelchain in the sizes that comprise the vast majority of use. Cast or fabricated chains of alloysor stainless steel are not considered.Particularly worthy of note is the actual and reference p
15、itch of these chains. Rivetlesschains, in general, are a slight degree longer than reference pitch. This allows the use ofANSI and ISO standard roller chains in combination with attached “dogs” to act as drives.According to the experienced estimate of the subcommittee members, roller chain/dog drive
16、sare used with more than half the drop forged rivetless chain systems in existence. Use ofthese drives permits systems of unlimited length.When considering metrication for these chains, the example followed was previouslyestablished for ANSI and BSA (DIN) chains, that is: soft metric conversion. Thi
17、s standardconsiders that the close even integers of pitch to the reference pitch is the appropriatemetric pitch conversion. All other metric conversions are made in accordance with acceptedSI conversion principles. The 2001 revision includes an update of the M.U.T.S. definitionin Section 3.This Stan
18、dard was approved by the American National Standards Institute on November8, 2001.ivASME B29 COMMITTEEChains, Attachments, and Sprockets for PowerTransmission and Conveying(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSJ. L. Wright, ChairC. G. Springm
19、an, Vice ChairM. Lo, SecretaryCOMMITTEE PERSONNELW. C. Hall, Ramsey Production Corp.L. E. Hampel, Allied-Locke Industries Inc.A. M. McCarty, Emerson Power TransmissionD. Moore, Jeffrey Chain Co.R. W. Neuhengen, Drives, Inc.V. D. Petershack, Hitachi Maxco, Ltd.V. E. Skipper, Alternate, Hitachi Maxco,
20、 Ltd.R. A. Reinfried, Conveyor Equipment Manufacturers AssociationS. Rhoad, Webster Industries Inc.R. J. Rothchild, U.S. Tsubaki, Inc.K. J. Smith, Kone, Inc.vCORRESPONDENCE WITH B29 COMMITTEEGeneral. ASME standards are developed and maintained with the intent to represent theconsensus of concerned i
21、nterests. As such, users of this Standard may interact with theCommittee by requesting interpretations, proposing revisions, and attending Committeemeetings. Correspondence should be addressed to:Secretary, B29 Main CommitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 1
22、0016-5990Proposing Revisions. Revisions are made periodically to the Standard to incorporatechanges that appear necessary or desirable, as demonstrated by the experience gained fromthe application of the Standard. Approved revisions will be published periodically.The Committee welcomes proposals for
23、 revisions to this Standard. Such proposals shouldbe as specific as possible, citing the paragraph number(s), the proposed wording, and adetailed description of the reasons for the proposal, including any pertinent documentation.Interpretations. Upon request, the B29 Committee will render an interpr
24、etation of anyrequirement of the Standard. Interpretations can only be rendered in response to a writtenrequest sent to the Secretary of the B29 Main Committee.The request for interpretation should be clear and unambiguous. It is further recommendedthat the inquirer submit his/her request in the fol
25、lowing format:Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the interpretationis being requested.Question: Phrase the question as a request for an interpretation of a specificrequirement suitable for gener
26、al understanding and use, not as a requestfor an approval of a proprietary design or situation. The inquirer mayalso include any plans or drawings, which are necessary to explainthe question; however, they should not contain proprietary names orinformation.Requests that are not in this format will b
27、e rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons
28、aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,”“certify,”“rate,” or “endorse” any item, construction, proprietary device,or activity.Attending Committee Meetings. The B29 Main Committee regularly holds meetings, whichare open to the p
29、ublic. Persons wishing to attend any meeting should contact the Secretaryof the B29 Main Committee.viASME B29.22-2001DROP FORGED RIVETLESS CHAINS, SPROCKET TEETH DRIVE CHAIN/DRIVE DOGS1 INTRODUCTIONThe drop forged rivetless chain has widespread usein many industries on trolleys, scraper flights, ass
30、embly,and similar conveyors. Because materials do not tendto pack in its open structure, the drop forged rivetlesschain is used extensively for flight conveyors. Its designpermits both horizontal and vertical operation overirregular routes, making it particularly acceptable fortrolley conveyor servi
31、ce.2 DEFINITIONSdrop forged rivetless chain: chain made from dropforged steel parts that are heat treated and are propor-tioned for high strength and comparative light weight.Its simple design permits assembly or dismantling byhand and this chain is available in three general typesas illustrated and
32、 described (see regular drop forgedrivetless chain, X-type chain, and modified X-type riv-etless chain). Numerous attachments are available tosuit a wide variety of applications including trolleyconveyor service.pin: part forged symmetrically with T-heads on bothends that lock into the sidebars (see
33、 Fig. 1).regular drop forged rivetless chain: chain used forgeneral applications where minimal side flexing isrequired (see Fig. 2). Attachments are available formounting on center links or on extended pins.sidebar: part made with a center panel that acts asa shield to reduce material falling throug
34、h the link andprovides strength. The center panel is provided with acenter drainage hole (see Fig. 3).FIG. 1 PIN1X-type chain: chain with greater side-flexing capabili-ties compared to regular chain (see Figs. 3 and 4).modified X-type rivetless chain: chain with the samefeature as X-type (see Fig. 4
35、); additionally, modifiedX-type has a controlled area, C, on the center linkthat helps prevent movement of attachments, which maybe mounted to the center link (see Fig. 5, dimension C.)3 MINIMUM ULTIMATE TENSILE STRENGTHMinimum Ultimate Tensile Strength (M.U.T.S.) forchains covered by this Standard,
36、 is the minimum forceat which an unused, undamaged chain could fail whensubjected to a single tensile loading test.(a) WARNING: The minimum ultimate tensilestrength is NOT a “working load.” The M.U.T.S.greatly exceeds the maximum force that may be appliedto the chain.(b) Test procedure. A tensile fo
37、rce is slowly applied,in uniaxial direction, to the ends of the chain sample.(c) The tensile test is a destructive test. Even thoughthe chain may not visibly fail when subjected to theminimum ultimate tensile force, it will have been dam-aged and will be unfit for service.The values adopted for this
38、 Standard are for heat-treated medium carbon steel chain only. Medium carbonsteels not in the heat-treated condition are not coveredby this Standard.Chains produced of other materials not covered inthis Standard (alloys, stainless steel) or by casting orfabricating will also have significantly diffe
39、rent valuesof M.U.T.S.FIG. 2 REGULAR DROP FORGED RIVETLESSCHAINDROP FORGED RIVETLESS CHAINS, SPROCKET TEETHDRIVE CHAIN/DRIVE DOGSASME B29.22-2001FIG. 3 X-TYPE DROP FORGED RIVETLESSCHAINCFIG. 4 X-TYPE CHAIN4 MEASURING LOADThe measuring load is determined as five times theweight of a 10 ft strand roun
40、ded to the nearest 100lb. This value is then converted to kilonewtons for themetric equivalent.5 STRAND LENGTH TOLERANCEThe length of new chains subjected to the specifiedmeasuring load must fall within the plus and minustolerances shown in Table 1. Specific maximum andminimum strand lengths are sho
41、wn in Tables 2, 3, and4 for each chain.Maximum and minimum strand tolerances for thegiven number of pitches in a measuring strand areshown in Table 1.6 DIMENSIONS FOR CHAIN LINKSTo assure interchangeability of links as produced bydifferent makers of chains, standard maximum andminimum dimensions are
42、 adopted. They are not actualdimensions used in manufacturing, but limiting dimen-sions, maximum or minimum, required to assure thedesired interchangeability.The metric equivalent dimensions are for referenceonly.7 FINISHSharp edges and protrusions shall be absent fromthe pin seating and driving fac
43、e areas of the center link.28 NUMBERING SYSTEMThe numbering system for the rivetless chain givessignificance to the chain number as shown.“X” type chain.No prefix designates “regular” rivetless chain.Reference chain pitch in inches.Last two digits designate nominal pin diameterX458in inches, i.e., 5
44、8 p58in.X 100 - 16Last two digits designate nominal pin diameterin millimeters.Reference chain pitch in millimeters.NOTE: Modified X-type chain is identified as X-type without addi-tional notation on the chain.9 CHAIN ASSEMBLYSee Fig. 5 and Tables 2, 3, and 4.10 SPROCKETSTwo sprocket tooth forms are
45、 included: Forms Aand B. The major difference between these two formsis in the method of generating the tooth form. FormA produces a curved tooth face and Form B a straighttooth face. Either form may be used. See Tables 5, 6,and 7, and Figs. 6 and 7.10.1 Sprocket Tooth Form DataRoot diameter (Dr), p
46、ocket radius (Rp), and outsidediameter (Do) must not exceed the values obtained bythe formulae. Oversize dimensions may cause improperchain and sprocket interaction and excessive chain loads(see Fig. 6).In some cases the outside diameter (Do) may belimited by special attachments mounted on the chain
47、.For this reason, the outside diameter (Do) should bechecked to assure that interference does not exist. Doobtained by the formula should be rounded off to thenext smallest18in. (3 mm).Chain clearance circle (Cc) established by the formulais the maximum and will provide clearance under mostcondition
48、s. However, the value obtained by the formulashould be checked to assure that a given hub diameterdoes not interfere with chain attachments.DROP FORGED RIVETLESS CHAINS, SPROCKET TEETHDRIVE CHAIN/DRIVE DOGS ASME B29.22-2001(a) RegularRivetless Chain(b) X-TypeRivetless Chain(c) Modified X-TypeRivetle
49、ss ChainFXaXaXaT T TFD D DF XZZZXXB B BLLLP P PP P P CB p width of center link openingC p center link mounting dimensionD p pin diameterF p chain heightL p chain width over pinsP p chain pitchT p sidebar thicknessX p center link width primaryXap center link width secondaryZ p width between sidebarsFIG. 5 CHAIN ASSEMBLYPocket radius (Rp) is the maximum and must notbe made greater than the value obtained by this formula.For this reason, the calculated value is reduced to thenext smaller12in. (13 mm).11 DRIVE11.1 Typical DriveThe drive shown in Fig. 8 is widely used and canbe located on
