1、GPS - Surface texture: Profile method Rules and procedures for the assessment of surface texture (IS0 4288 : 1996) English version of DIN EN IS0 4288 ICs 17.040.20 DIN - EN IS0 4288 Supersedes DIN 4775, June 1982 edition. Descriptors: GPS, surface texture, assessment. Geometrische Produktspezifikati
2、onen (GPS) - Oberflchenbeschaffenheit: Tastschnittverfahren - Regeln und Verfahren fr die Beurteilung der Oberflchenbeschaffenheit (IS0 4288 : 1996) European Standard EN IS0 4288 : 1997 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been
3、published in accordance with a decision taken by CEN/TC 290 to adopt, without alteration, International Standard IS0 4288 as a European Standard. The responsible German body involved in its preparation was the Normenausschu Technische Grundlagen (Fundamentals in Technology Standards Committee), Tech
4、nical Committee Geometrische Produktspezifi- kation und -prfung. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard IS0 1302 DIN IS0 1302 IS0 3274 IS0 12085 DIN EN IS0 3274 DIN EN IS0 12085 IS0 13565-1 IS0 13565-
5、2 DIN EN IS0 13565-1 DIN EN IS0 13565-2 Amendments DIN 4775, June 1982 edition, has been superseded by the specifications of EN IS0 4288, which is identical to IS0 4288. Previous edition DIN 4775: 1982-06. Continued overleaf. EN comprises 11 pages. Q No part of this standard may be reproduced withou
6、t the prior permission of Ref. No. DIN EN IS0 4288 : 1998-04 DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, D-i0772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group O9 Sales No. 1109 09.98 Page 2 DIN EN IS0 4288 : 1998-04 National An
7、nex NA Standards referred to (and not included in Normative references and Annex ZA) DIN EN IS0 3274 GPS - Surface texture: Profile method - Nominal characteristics of contact (stylus) instruments (IS0 3274 : 1996) DIN EN IS0 12085 GPS - Surface texture: Profile method - Motif parameters (IS0 12085
8、: 1996) DIN EN IS0 13565-1 GPS - Surface texture: Profile method -Surface having stratified functional properties - Part 1 : Filtering and general measurement conditions (IS0 13565-1 : 1996) DIN EN IS0 13565-2 GPS - Surface texture: Profile method -Surface having stratified functional properties - P
9、art 2: Height characterization using the linear material ratio (IS0 13565-2 : 1996) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 4288 November 1997 ICs 17.040.20 Descriptors: GPS, surface texture, assessment. English version Geometrical Product Specifications (GPS) Rules and procedures f
10、or the assessment of suiface texture (IS0 4288 : 1996) Surface texture: Profile method Spcification gomtrique des Geometrische Produktspezifikationen produits (GPS) - tat de surface: Mthode du profil - Rgles et proc- dures pour lvaluation de ltat de surface (IS0 4288 : 1996) (GPS) - Oberflchenbescha
11、ffenheit: Tastschnittverfahren - Regeln und Verfahren fr die Beurteilung der Oberflchenbeschaffenheit (IS0 4288 : 1996) This European Standard was approved by CEN on 1997-1 1-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this E
12、uropean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (Eng
13、lish, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech
14、 Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretari
15、at: rue de Stassart 36, B-1050 Brussels O 1997. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 4288 : 1997 E Page 2 EN IS0 4288 : 1997 Foreword International Standard IS0 4288 : 1996 Geometrical Product Specifications (GPS)
16、- Surface texture: Profile method - Rules and procedures for the assessment of surface texture, which was prepared by ISO/TC 57 Metrology and properties of surfaces of the International Organization for Standardization, has been adopted by Technical Committee CEN/TC 290 Dimensional and geometrical p
17、rod- uct specification and verification, the Secretariat of which is held by DIN, as a European Standard. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by May 1998 a
18、t the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
19、 the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. Endorsement notice The text of the International Standard IS0 4288 : 1996 was approved by CEN as a European Standard without any modification. NOTE: Normative references to international publications are listed i
20、n Annex ZA (normative). Page 3 EN IS0 4288 : 1997 Contents Page 1 Scope 4 2 Normative references . 4 . 3 Definitions 4 4 Parameter estimation . 4.1 Parameters defined over the sampling length . 4.2 Parameters defined over the evaluation length 4.3 Curves and related parameters 4.4 Default evaluation
21、 lengths 5 Rules for comparison of the measured values with the tolerance limits . Areas on the feature to be inspected . 5.1 5.2 The 16 % rule . 5.3 The max.-rule 5.4 Uncertainty of measurement . . 6 Parameter evaluation 6 6.1 General . 6 6.2 Roughness profile parameters . 6 7 7.1 Basic rules for t
22、he determination of cut-off wavelength for Rules and procedures for inspection using stylus instruments the measurement of roughness profile parameters . 7 7 7.2 Measurement of roughness profile parameters . 7 Annexes A Simplified procedure for roughness inspection . 9 B Relation to the GPS matrix m
23、odel 1 O C Bibliography 11 Introduction This International Standard is a geometrical product specification (GPS) standard and is to be regarded as a general GSP standard (see ISO/TR 14638). It influences the chain links 3 and 4 of the chains of stan- dards for roughness profile and primary profile.
24、For more detailed information of the relation of this International Standard to other standards and the GPS matrix model see annex B. The discrimination between periodic and non-periodic profiles is subjective and left to the discretion of the user. Page 4 EN IS0 4288 : 1997 1 Scope This Internation
25、al Standard specifies the rules for comparison of the measured values with the tolerance limits for surface texture parameters defined in IS0 4287, IS0 12085, IS0 13565-2 and IS0 13565-3. It also specifies the default rules for selection of cut- off wavelength, dc, for measuring roughness profile pa
26、rameters according to IS0 4287 by using stylus instruments according to IS0 3274. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were val
27、id. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below Members of IEC and IS0 maintain registers of currently valid International Sta
28、ndards. IS0 1302: 1992, Technical drawings - Method of indi- cating surface texture. IS0 3274: 1996, Geometrical Product Specifications (GPSI - Surface texture: Profile method - Nominal characteristics of contact (stylus) instruments. IS0 4287: 1 996, Geometrical Product Specifications (GPS) - Surfa
29、ce texture: Profile method - Terms, definitions and parameters of surface texture. IS0 12085: 1 996, Geometrical Product Specifications (GPS) - Surface texture: Profile method - Motif par- ameters. IS0 13565-1 : 1 996, Geometrical Product Specifi- cations (GPSI - Surface texture: Profile method; sur
30、- faces having Stratified functional properties - Part 7: Filtering and general measurement conditions. IS0 13565-2:1996, Geometrical Product Specrfi- cations (GPS) - Surface texture: Profile method; sur- faces having stratified functional properties - Part 2: Height characterization using the linea
31、r material ratio curve. IS0 13565-3:- 11, Geometrical Product Specifications (GPSI - Surface texture: Profile method; surfaces having stratified functional properties - Part 3: Height characterization using the material probability curve. IS0 14253-1 : - I), Geometrical Product Specifications (GPSI
32、- Inspection by measurement of workpieces and measuring instruments - Part 1: Decision rules for proving conformance or non-conformance with specifications. 3 Definitions For the purposes of this International Standard, the definitions given in IS0 3274, IS0 4287, IS0 12085, IS0 13565-2 and IS0 1356
33、5-3 apply. 1 i To be published. Page 5 EN IS0 4288 : 1997 4 Parameter estimation 4.1 Parameters defined over the sampling length 4.1.1 Parameter estimate An estimate of the parameters value is calculated using the measured data from only one sampling length. 4.1.2. Average parameter estimate An aver
34、age parameter estimate is calculated by taking the arithmetic mean of the parameter estimates from all the individual sampling lengths. When the standard number of five sampling lengths is used for roughness profile parameters, no suffix needs to be added to the symbol. For a parameter evaluated ove
35、r a number of sampling lengths other than five, that number shall be added as a suffix to the parameter symbol (eg. Rzl, Rz3). 4.2 Parameters defined over the evaluation length For parameters defined over the evaluation length (Pi, Rt and Wt), an estimate of a parameters value is calculated by using
36、 measurement data from an evaluation length equal to the standardized number of sampling lengths. 4.3 Curves and related parameters For curves and related parameters, an estimate of a parameters value is calculated by using measurement data from one curve, which has been computed based on the evalua
37、tion length. 4.4 Default evaluation lengths If not otherwise indicated on the drawing or in the technical product documentation, the evaluation length is as follows: R-parameters: the evaluation length is defined in clause 7; P-parameters: the evaluation length is equal to the length of the feature
38、being measured; motif-parameters: the evaluation length is defined in clause 5 of IS0 12085: 1996; parameters defined in IS0 13565-2 and IS0 13565-3: the evaluation length is defined in clause 7 of IS0 13565-1 :1996. 5 Rules for comparison of the measured values with the tolerance limits 5.1 Areas o
39、n the feature to be inspected The surface texture of the workpiece under inspection can appear homogeneous or be quite different over various areas. This can be seen by visual examination of the surface. In cases where the surface texture appears homogeneous, parameter values determined over the ent
40、ire surface shall be used for comparison with the requirements specified on the drawings or in the technical product documentation. If there are separate areas with obviously different surface texture, the parameter values which are de- termined on each area shall be used separately for comparison w
41、ith the requirements specified on the drawings or in the technical product documentation. For requirements specified by the upper limit of the parameter, those separate areas of the surface shall be used which appear to have the maximum par- ameter value. 5.2 The 16 %-rule For requirements specified
42、 by the upper limit (see IS0 1302:1992, 6.2.3) of a parameter, the surface is considered acceptable if not more than 16 % of all the measured values (see notes 1 and 2) of the selected parameter, based upon an evaluation length, exceed the value specified on the drawings or in the technical product
43、documentation. For requirements specified by the lower limit of the surface parameter, the surface is considered accept- able if not more than 16 % of all the measured values (see notes 1 and 2) of the selected parameter, based upon an evaluation length, are less than the value specified on the draw
44、ings or in the technical product documentation. To designate the upper and the lower limits of the par- ameter, the symbol of the parameter shall be used without the “max.” index. NOTES 1 Annex A provides simplified practical guidance for com- paring measured values with upper and lower limits. 2 In
45、 cases where the values of the roughness profile par- ameter of the surface being inspected follow a normal dis- tribution, the determination of the upper limit as a limit which may be exceeded by 16 % of the measured values of the roughness profile parameter conforms with the limit determined by th
46、e value p+ o, where p is the arithmetic mean value of the roughness profile parameter and ois the standard deviation of the values. The greater the value of o, the further from the specified limit (the upper value) the mean value of the roughness profile parameter needs to be. (See figure 1 .) Page
47、6 EN IS0 4288 : 1997 5.3 The max.-rule For requirements specified by the maximum value (see IS0 1302:1992, 6.2.2) of the parameter during inspection, none of the measured values of the par- ameter over the entire surface under inspection shall exceed the value specified on the drawings or in the tec
48、hnical product documentation. To designate the maximum permissible value of the parameter, the “max.“ index has to be added to the symbol of the parameter (for example Rzl max.). 5.4 Uncertainty of measurement For proving conformance or non-conformance with specification, measured values of paramete
49、rs shall be compared with the specified limiting values taking into account the uncertainty of measurement according to the rules given in IS0 14253-1. In case of comparing results of measurement with upper and lower limits, the uncertainty of measurement shall be estimated without taking into account the inhomogeneity in the surface which is already accounted for in the 16 % allowance. 6 Parameter evaluation 6.1 General Surface texture parameters are not useful for the de- scription of surface defects. Therefore, surface de- fects, e.g. scratches and pores, s
