1、BSI Standards PublicationBS ISO 18669-1:2013Internal combustion engines Piston pinsPart 1: General specificationsBS ISO 18669-1:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 18669-1:2013.It supersedes BS ISO 18669-1:2004 which is withdrawn.The UK partici
2、pation in its preparation was entrusted to TechnicalCommittee MCE/14/-/10, RIC engines - Cylinders, pistons and rings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contrac
3、t. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69319 9ICS 43.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authorit
4、y of theStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBS ISO 18669-1:2013 ISO 2013Internal combustion engines Piston pins Part 1: General specificationsMoteurs combustion interne Axes de pistons Partie 1: Spcifications gnralesINTERNATI
5、ONAL STANDARDISO18669-1Second edition2013-07-15Reference numberISO 18669-1:2013(E)BS ISO 18669-1:2013ISO 18669-1:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized other
6、wise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCa
7、se postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 18669-1:2013ISO 18669-1:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Terms and definitions . 12.1 General . 12.2 Geometrical
8、and manufacturing features of piston pins 13 Symbols 24 Nomenclature 34.1 Outside, inside and end features . 34.2 Outside edge and inside chamfer configurations 64.3 Outside-edge drop-off configuration . 85 Codes . 96 Designation of piston pins .106.1 Designation elements and order 106.2 Designation
9、 examples 117 Piston pin types, dimensions and tolerances 117.1 Manufacturing types . 117.2 Dimensions and tolerances . 128 Material and heat treatment .178.1 Type of material 178.2 Core hardness l core strength . 198.3 Carburised and nitrided case depth 198.4 Surface hardness 208.5 Volume change .
10、209 Common features 209.1 Roughness of surfaces . 209.2 Marking of piston pins . 219.3 Miscellaneous 2110 Quality requirements .2210.1 Material characteristics 2210.2 Material defects . 2210.3 Visual defects . 23Bibliography .24BS ISO 18669-1:2013ISO 18669-1:2013(E)ForewordISO (the International Org
11、anization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been establi
12、shed has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizatio
13、n.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with t
14、he editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rig
15、hts identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee res
16、ponsible for this document is ISO/TC 22, Road vehicles.This second edition cancels and replaces the first edition (ISO 18669-1:2004), which has been technically revised.ISO 18669 consists of the following parts, under the general title Internal combustion engines Piston pins: Part 1: General specifi
17、cations Part 2: Inspection measuring principlesiv ISO 2013 All rights reservedBS ISO 18669-1:2013INTERNATIONAL STANDARD ISO 18669-1:2013(E)Internal combustion engines Piston pins Part 1: General specifications1 ScopeThis part of ISO 18669 specifies the essential dimensional characteristics of piston
18、 pins with an outer diameter between 8 mm and 100 mm, for reciprocating internal combustion engines for road vehicles and other applications. In addition, it establishes a vocabulary, a pin-type classification, material description based on mechanical properties, common features and quality requirem
19、ents.The use of this part of ISO 18669 may require a manufacturer and customer statistical process control agreement.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1 General2.1.1piston pinprecision cylindrical component that connects the piston
20、to the connecting rod and has a smooth hard peripheral surface2.2 Geometrical and manufacturing features of piston pins2.2.1 Bore types2.2.1.1cylindricalpin having a straight cylindrical bore2.2.1.2centre webpin inside diameter formed symmetrically from each end leaving a web in the pin centreNote 1
21、 to entry: The web is subsequently removed leaving a step as shown in Figure 3.2.2.1.3taperedpin with conical-shaped inside diameter near the ends that reduces the weight of the piston pin2.2.1.4machinedpin with inside diameter produced solely by machining2.2.1.5seamless drawn tubehollow steel produ
22、ct which does not contain any line junctures resulting from the method of manufacture ISO 2013 All rights reserved 1BS ISO 18669-1:2013ISO 18669-1:2013(E)2.2.1.6end webpin inner diameter formed from one end leaving a web near the opposite endNote 1 to entry: The web is punched out. The pin is then d
23、rawn over a mandrel and a forming line may result as shown in Figure 4.2.2.2 Outside-edge configurations2.2.2.1chamferoutside-edge bevelled feature that is sometimes used to mate with a round retainer ringNote 1 to entry: Referred to as “locking chamfer” when a round wire retainer ring is located on
24、 the chamfer angle and used to secure the pin in the piston.2.2.2.2form angle region of outside-edge form that provides a smooth transition to the peripheral surface to facilitate ease of assembly2.2.2.3form angle region of outside-edge form that provides a smooth transition to the end face2.2.2.4dr
25、op-offnon-functional machining feature that creates a transition between the outside edge and the peripheral surfaceNote 1 to entry: See Figure 12.2.2.2.5inside-edge chamferbevelled edge between the bore surface and the end faces of the piston pin2.2.2.6gauge pointlocating point on the pin outside-e
26、dge chamfer from where the gauge diameter (d5) and gauge length (l5) are measured2.2.3 Other features2.2.3.1volume changechange detected as a permanent outside-diameter dimensional deviation at reference temperature after being heated to a test temperature for a specified period of time2.2.3.2slag l
27、ineslinear flaws of non-metallic inclusions3 SymbolsFor the purposes of this part of ISO 18669, the symbols in Table 1 apply.2 ISO 2013 All rights reservedBS ISO 18669-1:2013ISO 18669-1:2013(E)Table 1 SymbolsSymbol abbreviation Descriptiona Wall thicknessb Outside-edge drop-off lengthc Outside-edge
28、drop-off heightd1Outside diameterd2Inside diameterd3Tapered bore diameterd4Centre-web diameterd5Gauge diameterd6End face diametere Tapered bore runoutf Outside-edge lengthg Outside-edge chamfer lengthHsLimit hardnessh1End face concavityh2End face stepk Tapered bore reliefl1Lengthl3Tapered bore lengt
29、hl4Centre-web lengthl5Gauge lengthr Outside-edge radiusRmCore strengths End face runoutt1Inside-edge chamfer lengtht2Outside-edge form length Tapered bore angle Outside-edge chamfer angle Outside-edge form angle end face Outside-edge form angle4 Nomenclature4.1 Outside, inside and end featuresTerms
30、commonly used to describe pins with a cylindrical bore are shown in Figure 1. ISO 2013 All rights reserved 3BS ISO 18669-1:2013ISO 18669-1:2013(E)Key1 end face2 bore surface3 peripheral surfaced1outside diameterd2inside diameterl1lengtha wall ticknessaSee Figure 2.Figure 1 Pin with cylindrical boreT
31、erms commonly used to describe end face concavity are shown in Figure 2a).Terms commonly used to describe end face step are shown in Figure 2b).a) End face concavity b) End face stepKeyh1end face concavityh2end face stepd6end face diameterNOTE End face concavity and end face step not recommended for
32、 end face locking.Figure 2 Detail W of Figure 1Terms commonly used to describe pins with a centre web are shown in Figure 3.4 ISO 2013 All rights reservedBS ISO 18669-1:2013ISO 18669-1:2013(E)Key1 centre-web radiusl4centre-web lengthd4centre-web diameterFigure 3 Pin with cold-formed centre webTerms
33、commonly used to describe pins with a cold-formed end-web are shown in Figure 4.Key1 end-web forming lineFigure 4 Pin with cold-formed end webTerms commonly used to describe pins with a tapered bore are shown in Figure 5.Key1 tapered bore surface tapered bore angled3tapered bore diameterl3tapered bo
34、re lengthFigure 5 Pin with tapered bore ISO 2013 All rights reserved 5BS ISO 18669-1:2013ISO 18669-1:2013(E)4.2 Outside edge and inside chamfer configurationsTerms commonly used to describe the outside edge and inside chamfer configurations are shown in Figure 6.Key1 outside-edge chamfer or radius2
35、inside-edge chamfert1inside-edge chamfer lengthaSee Figures 7 and 8.bSee Figure 9.NOTE This may be used with either a round or rectangular retainer ring.Figure 6 Outside-edge configuration (detail X: chamfered; detail Y: radiused)4.2.1 Chamfered outside-edge configurationTerms commonly used to descr
36、ibe the chamfered outside-edge configuration are shown in Figure 7.Keyf outside-edge length outside-edge chamfer angleFigure 7 Chamfered configuration (detail X of Figure 6)4.2.2 Double-chamfered outside-edge configurationTerms commonly used to describe double-chamfered outside-edge configurations a
37、re shown in Figure 8. The double chamfer is for assembly improvements of the piston pin.6 ISO 2013 All rights reservedBS ISO 18669-1:2013ISO 18669-1:2013(E)Keyf outside-edge lengthg outside-edge chamfer length outside-edge form angle outside-edge chamfer angleFigure 8 Double-chamfered configuration
38、(detail X of Figure 6)4.2.3 Radiused outside-edge configurationTerms commonly used to describe radiused outside-edge configurations are shown in Figure 9.Keyr outside-edge radiusf outside-edge length outside-edge form angleFigure 9 Radiused configuration (detail Y of Figure 6)4.2.4 Chamfer-locking o
39、utside-edge configurationTerms commonly used to describe chamfer-locking outside-edge configurations are shown in Figures 10 and 11. ISO 2013 All rights reserved 7BS ISO 18669-1:2013ISO 18669-1:2013(E)Key1 gauge pointsl5gauge lengthd5gauge diameterFigure 10 Chamfer-locking outside-edge for round ret
40、ainer ringKey1 gauge pointg outside-edge chamfer lengthf outside-edge lengthl5gauge lengthd5gauge diameterFigure 11 Detail Z of Figure 104.3 Outside-edge drop-off configurationTerms commonly used to describe outside-edge drop-off configurations are shown in Figure 12a), 12b) and 12c).8 ISO 2013 All
41、rights reservedBS ISO 18669-1:2013ISO 18669-1:2013(E)The outside-edge drop-off is for manufacturing purposes and is therefore a chamfer that is very small in height but long in length.a) Chamfered edge and drop-off b) Double-chamfered edge and drop-offc) Radiused edge and drop-offKeyb outside-edge d
42、rop-off lengthc outside-edge drop-off heightg outside-edge chamfer lengthf outside-edge length outside-edge form angle outside-edge chamfer angleFigure 12 Drop-off configurations (detail X and Y of Figure 6)5 CodesCodes used for piston pins shall be as given in Table 2 with their explanatory descrip
43、tions. ISO 2013 All rights reserved 9BS ISO 18669-1:2013ISO 18669-1:2013(E)Table 2 Codes and descriptionsCode DescriptionRelevant sub-clause of this part of ISO 18669P1P6 Pin-type classification according to manufacturing method of the pin centre hole 7.1X Piston pins in combination with needle bear
44、ing 8.3F1, F2, F3 Outside-edge configuration tolerance class 7.2.4K Carburising steel class K 8.1 / 8.2S Carburising steel class S 8.1 / 8.2L Carburising steel class L 8.1 / 8.2M Carburising steel class M 8.1 / 8.2N Nitriding steel class N 8.1 / 8.2V Piston pins with limited volume change 8.3 / 8.4
45、/ 8.5H1, H2 Surface hardness class 8.4R1, R2 Peripheral surface roughness class 9.1.1G Chamfer-locking outside-edge configuration (gauge point) 6.2 / 7.2.4R Outside-edge radiused 7.2.4 / 6.1.2C1 Outside-edge chamfered 7.2.4C2 Outside-edge double chamfered 7.2.4LA, LB Length tolerance class 7.2.3MM M
46、anufacturers mark 9.2TC Piston pins with bore surface cold formed 7.2.66 Designation of piston pins6.1 Designation elements and orderTo designate piston pins, the following details shall be given, in the order shown below. The codes given in Table 2 shall be used.6.1.1 Mandatory elementsThe followin
47、g mandatory elements shall constitute the designation of a piston pin: designation, i.e. piston pin; number of International Standard: ISO 18669; type of piston pin, e.g. P1; hyphen; size of piston pin, d1 d2 l1or d1/ d3 d2 l1for a pin with tapered bore; hyphen; material code, e.g. L.10 ISO 2013 All
48、 rights reservedBS ISO 18669-1:2013ISO 18669-1:2013(E)6.1.2 Additional elementsThe following optional elements may be added to the designation of a piston pin; in this case they shall be separated from the mandatory elements by a slash (/): code for outside-edge configuration, e.g. R, C1, C2, G; siz
49、e of chamfer-locking gauge dimensions, d5 l5 when code G is specified; code for limited volume change, V; code for surface hardness, H1, H2; code for surface roughness, R1, R2.6.2 Designation examplesThe following are examples of piston pin designation in accordance with this part of ISO 18669.EXAMPLE 1 Designation of a piston pin complying with the requirements of ISO 18669-1, manufacturing type P5 (P5) of outside diameter d1= 20 mm (20), inside diameter d
