《BS-ISO-18669-2-2004.pdf》由会员分享，可在线阅读，更多相关《BS-ISO-18669-2-2004.pdf（18页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 18669-2:2004 Internal combustion engines Piston pins Part 2: Inspection measuring principles ICS 43.060.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 18669-2:2004 This British Standard was published unde
2、r the authority of the Standards Policy and Strategy Committee on 7 February 2005 BSI 7 February 2005 ISBN 0 580 45388 X National foreword This British Standard reproduces verbatim ISO 18669-2:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted b
3、y Technical Committee MCE/14, RIC engines, to Subcommittee MCE/14/-/10, RIC engines Cylinders, pistons and rings, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implem
4、ent international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport
5、 to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee a
6、ny enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, p
7、ages 1 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled
8、 Copy, (c) BSI Reference number ISO 18669-2:2004(E) INTERNATIONAL STANDARD ISO 18669-2 First edition 2004-09-01 Internal combustion engines Piston pins Part 2: Inspection measuring principles Moteurs combustion interne Axes de pistons Partie 2: Principes de mesure pour le contrle BS ISO 186692:2004
9、Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Forewordiv 1 Scope1 2 Normative references .1
10、3 Measuring principles2 3.1 General measuring conditions 2 3.2 Characteristics and measuring principles .2 BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization
11、) 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 established has the right to be repr
12、esented 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 standardization. International Standards ar
13、e drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internation
14、al Standard requires approval by at least 75 % of the member bodies casting a vote. Attention 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. ISO 18669-2 was p
15、repared by Technical Committee ISO/TC 22, Road vehicles. ISO 18669 consists of the following parts, under the general title Internal combustion engines Piston pins: Part 1: General specifications Part 2: Inspection measuring principles BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, S
16、un Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS-96681 O2:(4002E) 1 Internal combustion engines Piston pins Part 2: Inspection measuring principles 1 Scope This part of ISO 18669 defines the measuring principles to be used for measuring piston pins; it applies
17、to piston pins from 8 mm up to and including 100 mm outside diameter for reciprocating internal combustion engines and compressors. In certain applications, except road vehicles, and provided that mutual agreement is made between the purchaser and the manufacturer, this part of ISO 18669 may be used
18、 with suitable modifications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appli
19、es. ISO 1101, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out ISO 2639, Steels Determination and verification of the depth of carburized and hardened cases ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profi
20、le method Terms, definitions and surface texture parameters ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture ISO 9934 (all parts), Non-destructive testing Magnetic particle testing ISO 6506 (all parts), Meta
21、llic materials Brinell hardness test ISO 6507 (all parts), Metallic materials Vickers hardness test ISO 6508 (all parts), Metallic materials Rockwell hardness test QS 9000, Quality Systems Requirements ISO 14104:1995, Gears Surface temper etch inspection after grinding ISO 14253 (all parts), Geometr
22、ical Product Specifications (GPS) Inspection by measurement of work pieces and measuring equipment ISO 18669-1:2004, Internal combustion engines Piston pins Part 1: Specifications EN 583 (all parts), Non-destructive testing Ultrasonic examination BS ISO 186692:2004 Licensed Copy: sheffieldun sheffie
23、ldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 3 Measuring principles 3.1 General measuring conditions The following general requirements are applicable to all measuring principles unless otherwise specified: a) Measurements shall be made using instruments with a resoluti
24、on not exceeding 10 % of the tolerance of the dimension being measured. b) Concerning “Measuring uncertainty”, take notice of ISO 14253. c) Concerning “Acceptance of gauge repeatability and reproducibility (% R & R)” take notice of QS 9000. d) The reference temperature for outside-diameter measureme
25、nts shall be 21 1 C. 3.2 Characteristics and measuring principles Characteristic Measuring principle 3.2.1 Outside diameter d1 Diameter of the outer surface measured at any point excluding areas of edge drop-off, b (see Figure 10, ISO 18669:2004). Method A: Reference method. Measure with a precision
26、 calliper having spherical measuring probes each of radius 1,5 mm min. exerting a measuring force of approximately 1 N (see Figure 1). Figure 1 Outside-diameter measuring principle Other methods: All methods which are able to guarantee the required measurement uncertainty. Method must be agreed to b
27、etween manufacturer and client. Measurement uncertainty: 0,000 5 mm in accordance with ISO 14253 BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Characteristic Measuring principle 3.2.2 Cylindricity of the outside diamet
28、er d1 Geometric form of the peripheral surface excluding areas of edge drop-off, b. Characteristics measured in the axial direction are taper, convexity, concavity and waviness. (Reference: ISO 1101) Method A: Record and evaluate a macro-form diagram of opposite sides in the axial direction (profile
29、 lines) or by recording and evaluating of a multiple polar diagram (measuring in min. 3 planes, near both ends and centre of pin). Method B: Outside diameter, d1 measured in a V-block by diametral gauging at centre of piston pin and at distance lxfrom both ends and calculating the difference rate (s
30、ee Figure 2). Measuring sensor: according to 3.2.1. lx = 0,15 d1 d1 W 50 mm lx = 0,10 d1 d1 0,2 mm 2. limited volume change Hs = 500 HV 0,3 with carburised case depth u 0,2 mm Hs = 500 HV 1 with carburised case depth 0,2 mm Limit hardness Hs of nitrided piston pins: Hs = 550 HV 0,3 with nitrided cas
31、e depth u 0,2 mm Hs = 550 HV 1 with nitrided case depth 0,2 mm BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7 Characteristic Measuring principle 3.2.17 Core hardness Hardness in the core zone that is not affected by the
32、 case-hardened or nitrided layer. Method A: reference method Testing with Vickers HV 30 in accordance with ISO 6507. Method B: Testing with Brinell HB 2,5/187,5 in accordance with ISO 6506. Method C: Testing with Rockwell C in accordance with ISO 6508. Measure in the centre of the core zone that is
33、not affected by the case-hardened or nitrided layer. The core zone, when sampled, must not be cold-hardened or heated, and must be located at least 1/3 l1 from the end face. The average of 3 measurements is taken as the determining value. No individual value may deviate more than 10 % from the avera
34、ge value. 3.2.18 Peripheral surface hardness Hardness measured on the peripheral surface of the carburised or nitrided layer. Method A: Reference method Case-hardened and nitrided piston pins: Testing with Vickers HV 10 in accordance with ISO 6507. Method B: Case-hardened piston pins: Testing with R
35、ockwell C, A or N in accordance with ISO 6508. NOTE In order to attain a precise measurement result, testing should be done with the highest possible load, but with consideration to the danger of pressing through the case-hardened layer. 3.2.19 Volume change A change in volume detected as a permanen
36、t outside-diameter dimensional deviation at reference temperature after being heated to a test temperature for a specified period of time. At reference temperature measure the outside diameter d1at a minimum of 2 locations. Permanently mark the locations for later measurement. The measuring gauges u
37、sed shall comply with the requirements described in 3.2.1. Test conditions shall comply with the following: Uniform heating at the test temperature. 4 h holding time at the test temperature. Limit temperature deviation to 5 C. Cooling to reference temperature with no quenching. New measurement at th
38、e same measuring locations. The average of the outside-diameter differences found at all measuring locations is the determining value. BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 8 Characteristic Measuring principle 3.
39、2.20 Material defects Defects occurring on the peripheral surface, bore surface and core zone such as grinding cracks, hardening cracks, stress cracks, inclusions, slag lines and seams. Method A: Magnetic particle inspection Magnetic particle inspection according to ISO 9934. Magnetisation in axial
40、and circumferential direction using a minimum tangential field strength of 2500 A/m on the surface to be inspected. Evaluation shall be based on fluorescence. Application: Detection of defects on the surface and beneath the surface up to a depth of 0,2 mm. Method B: Ultrasonic inspection according t
41、o EN 583 Method using transverse waves. Inspect piston pin using the Pulse-echo technique with a direct contact angle-beam probe (see Figure 9) or by using the immersion technique. Key 1 ultrasonic probe 2 sound propagation 3 piston pin Figure 9 Ultrasonic inspection principle Coupling or immersion
42、in a suitable couplant. Any means of rotating the part and/or transducer that insures full volume inspection. The incident angle shall insure full mode conversion to a transverse wave (must be equal to or greater than the first critical angle). Frequency: 4 to 12 MHz Transducer-diameter for pin diam
43、eter: u 50 mm: 8 10 mm 50 mm: 8 15 mm Reference: Piston pins with defined artificial or natural defects shall be used as reference for the calibration. Proposed artificial notches on external and internal surfaces as follows: width: 0,15 mm depth: 0,20 mm length: 20,00 mm Calibration: According to F
44、igure 9, the probe is coupled to the reference pin and the echo of the internal and external reference reflectors are maximised. The highest amplitude shall be set to full (100 %) screen height. BS ISO 186692:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:12:57 GMT+00:00 2006, Uncont
45、rolled Copy, (c) BSI 9 Characteristic Measuring principle Noise suppression may be used, but only to such a level that the noise is about to disappear. The rejection level (gate level) shall be set to 40 % screen height. Application: Detection of defects within the whole volume and on external and i
46、nternal surfaces of the pin. Preferably, defects parallel to the pin axis (longitudinal flaws). Detection limit: Detection, which shows signals above 40 % screen height. Method C: Eddy current inspection Traverse length of peripheral surface as piston pin is scanned using a differential probe. Frequ
47、ency range: from 200 Hz to 3 MHz. Piston pins must be demagnetised before Eddy current inspection. Reference: Piston pins with defined artificial or natural defects shall be used as reference for the calibration. Proposed artificial notches on external surface as follows: width: 0,1 mm depth: 0,1 mm
48、 length: 5 mm Calibration: The probe is to be set to the reference pin at a distance of approximately 0,2 mm. Reflection of the reference is to be adjusted to maximum amplitude. The highest amplitude shall be set to 100 % monitor height. The rejection level shall be set to 40 % monitor height. Appli
49、cation: Detection of material defects on the scanned surface and beneath surface up to a depth of 0,05 mm. Detection limit: Detection, which shows signals above 40 % monitor height. 3.2.21 Residual magnetism Remaining magnetism after demagnetisation. Measuring instrument: Residual-field-intensity instrument. Measure at the following locations: End faces Outside chamfers 3 points