1、VDA - Recommendation July 2003Geometrical Product SpecificationSurface TextureRules and Procedures for the Assessment ofSurface TextureVDA2006Descriptors: surface texture, surface roughness, evaluation, rules, proceduresContinuation Page 2 to 6VERBAND DER AUTOMOBILINDUSTRIE E.V. (VDA) Westendstrae 6
2、1, 60325 FrankfurtVertrieb: DOKUMENTATION KRAFTFAHRTWESEN E.V. (DKF) Ulrichstrae 14, D-74321 Bietigheim-BissingenPrefaceIn contrast to the earlier issues of the national standards for testing surface texture, the interna-tional standards listed in “Scope” contain roughness characteristic values and
3、equipment compo-nents (filters) that may not be common in the automobile industry or whose use leads to deviationsfrom previous measurement results. Furthermore, new rules are introduced in connection with newfilters for the exact description of the surface that were not standard up to now. This rec
4、ommenda-tion was created in order to maintain continuity with the previous specifications and to ensure thecomparability of previous measurement results with future measurement results. The standardslisted in “Scope” largely remain in force, and this recommendation describes only the deviationsfrom
5、them.NOTE No guarantee can be given in respect of this translation. In all cases the latestGerman-language version of this Standard shall be taken as authoritative.ChangesIn comparison with edition 2002-07, the following changes have been made:- The deviations from DIN EN ISO 4288 were added by the
6、clauses 7.2.1 “Procedure for non-periodic roughness profile“ and 7.2.2 “Procedure for periodic roughness profile“.1 ScopeThis recommendation applies to surface measurement in the automotive industry.The following standards apply, completely or with restrictions, to measuring devices and their com-po
7、nents for testing surface texture:DIN EN ISO 3274DIN EN ISO 4287DIN EN ISO 4288DIN EN ISO 11562DIN EN ISO 13565-1 and DIN EN ISO 13565-2The restrictions are described in section 4.The standards DIN EN ISO 12085 and DIN EN ISO 13565-3 are not applied because there is asyet no experience with these me
8、asuring methods.The specification of surface texture is defined in VDA 2005.Page 2VDA 2006 : 2003-072 Normative referencesThe following normative documents contain provisions, which, through reference in this text, con-stitute provisions of this standard. For dated references, subsequent amendments
9、or revisions tothis publication do not apply. Users of this standard are nevertheless requested to check whether itis possible to use the latest versions of the following normative documents. For undated refer-ences, the most recent issue of the normative document referred to applies. Members of ISO
10、 andIEC maintain directories of the valid international standards.DIN EN ISO 3274: 1998, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod, Nominal Characteristics of Contact (Stylus) InstrumentsDIN EN ISO 4287: 1998, Geometrical Product Specifications (GPS), Surface Texture:
11、ProfileMethod Terms, Definitions and Surface Texture ParametersDIN EN ISO 4288: 1998, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod Rules and Procedures for the Assessment of Surface TextureDIN EN ISO 11562: 1998, Geometrical Product Specifications (GPS), Surface Texture:
12、ProfileMethod Metrological Characteristics of Phase Correct FiltersDIN EN ISO 12085: 1998, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod Motif ParametersDIN EN ISO 13565-1: 1998, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod Surfaces having Strat
13、ified Functional Properties Part 1: Filtering and General Meas-urement ConditionsDIN EN ISO 13565-2: 1998, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod Surfaces having Stratified Functional Properties Part 2: Height Characterization Usingthe Linear Material Ratio CurveDIN
14、 EN ISO 13565-3: 2000, Geometrical Product Specifications (GPS), Surface Texture: ProfileMethod Surfaces having Stratified Functional Properties Part 3: Height Characterization Usingthe Material Probability CurveDIN EN ISO 14253-1: 1999, Geometrical Product Specifications (GPS):Inspection by Measure
15、ment of Workpieces and Measuring Equipment Part 1: Decision Rules forProving Conformance or Non-Conformance with Specifications3 DefinitionsThe definitions according to DIN EN ISO 3274, DIN EN ISO 4287, DIN EN ISO 4288,DIN EN ISO 11562, DIN EN ISO 13565-1 and DIN EN ISO 13565-2 are valid for the app
16、lication ofthis standard.Page 3VDA 2006 : 2003-074 Rules for the application of the standards for surface measurementThe standards listed in “Scope” have unrestricted validity except as specified in sections 4.1 to4.3 below.4.1 DIN EN ISO 3274 Geometrical Product Specifications (GPS),Surface Finish:
17、 Profile method, nominal characteristics of contact(stylus) instrumentsThis standard is applied with the following modifications: Section 3.1.4 Primary profileThe use of the filter for short wave lengths g108s is not permitted in principle; for exceptions seeAppendix B1 within this section. The prim
18、ary profile is the unfiltered complete profile and thusthe basis for calculating the characteristic values of the primary profile Section 3.4.12 Limitation of the transmission of short wave lengthsThis section, including the note, is not applied. Section 4.1 Geometry of the stylus tipThe nominal val
19、ues are as follows: Tip radius rtip= 2 m, 5 m Cone angle: 60, 90Unless otherwise specified, the cone angle is 90. Section 4.4 Relationship between the wave length limit for the roughness g108c,tip radius and the wave length limits for the roughnessThis section, including table 1, is not applied.In c
20、ase of arbitration, a stylus system with a tip radius of 2 m shall be used for Rz g163 2 m anda stylus system with a tip radius of 5 m for Rz 2 m. The maximum spacing between meas-uring points is 0.5 m. Appendix B.1 IntroductionParagraphs 3 and 4 are not applied and are replaced by the following:The
21、 effect of these variables cannot be determined with certainty. The measures taken to cor-rect undeterminable, disruptive influences in the short-wave range must not suppress the influ-ences coming from the surface.The filter g108s is not permitted in principle because it does not distinguish betwee
22、n useful anddisruptive influences. In cases of a required specification for the filter g108s, the effect on the de-scription of the surface is considered tested and can be connected with the documentation ofthe evaluation conditions. Appendix B.2 Essential goals for the introduction of transmission
23、bandsThis section is not applied. Appendix B.3 ConclusionThis section is not applied.Page 4VDA 2006 : 2003-074.2 DIN EN ISO 4287 Geometrical product specifications (GPS),surface texture: profile method terms,definitions and surface texture parametersThis standard is applied with the following modifi
24、cations: Section 3.1.1 Profile filterWithout consideration of the short wave profile filter g108s, the transmission characteristicchanges as follows:1) Transmission in %2) Wave length3) Roughness profile4) Waviness profileFigure 1 Transmission characteristic for roughness and waviness profileThe not
25、e is modified as follows:NOTE Two filters are used with devices for measuring roughness and waviness (see figure 1).They all have the same transmission characteristics as defined in DIN EN ISO 11562, but differentwave length limits. Section 3.1.1.1 g108s profile filterThis section is not applied. Se
26、ction 3.1.6 Roughness profileNotes 1 and 3 are not applied. Section 4.1.3 Greatest height of profile Pz, Rz, WzThe following note is added to this section:NOTE In case of several individual measuring distances, the mean value of these measuring dis-tances is the mean peak-to-valley roughness Rz and
27、the largest determined value is the maximumpeak-to-valley roughness Rmax.Page 5VDA 2006 : 2003-074.3 DIN EN ISO 4288 Geometrical product specifications (GPS),surface texture: profile method rules and proceduresfor the assessment of surface textureThis standard is applied with the following modificat
28、ions and addition: Section 4.1.2 Average parameter estimateThe last sentence is changed as follows:If a different number of individual measuring distances is used for calculating a measuredvalue of a characteristic value on the roughness profile, this number must be documented inthe measurement and
29、evaluation conditions. The new section is an addition to section 4.1“Characteristic values that are defined via an individual measuring distance.”The new section is an addition to section 4.1 “Parameters defined over the sampling length“ New section: Maximum peak-to-valley roughness RmaxThe maximum
30、peak-to-valley roughness Rmax is the largest of the individual peak-to-valleyroughness values found over the entire measuring distance. The individual peak-to-valleyroughness here is the distance between two parallels to the center line that touch the highestand the lowest points of the roughness pr
31、ofile within the individual measuring distance.The values of the characteristic values on the roughness profile are generally calculated basedon five individual measuring distances. If the calculation of the measured value of the charac-teristic value Rmax on the roughness profile is based on a diff
32、erent number of individualmeasuring distances, this must be stated as in VDA 2005, section 10, “Drawing notes for spe-cial functions”, (e.g., 0.8x3/Rmax 6.3) or defined in the measurement conditions.The functional significance of Rmax as distinguished from the individual peak-to-valley rough-ness va
33、lues Zi and the total height of the profile Rt is shown in figure 2.Figure 2 Determining Rmax as distinguished from RtFigure 2 shows the determination of the maximum peak-to-valley roughness Rmax as themaximum value of the Z values of the five individual measuring distances.NOTE Rz1max acc. to DIN E
34、N ISO 4288 is not applied.Page 6VDA 2006 : 2003-07 Section 5.1 Areas to test on a geometry elementThe following is added to the last paragraph:No measured value of all applied characteristics of the surface to be tested shall exceed thevalue specified in the technical product documentation, for exam
35、ple in the drawing. It is gener-ally the highest-value rule, even if the index “max” is not specified in the designation. Section 5.2 The 16% ruleThis section is not applied.NOTE The 16% rule is not justifiable. The scattering of the characteristic values that is natu-rally found in the surface has
36、always been taken into consideration in determining limit values.Furthermore, Rmax was previously expressly excepted from the 16% rule, even though thisvalue has the greatest scatter. Section 5.3 The highest-value ruleNOTE The highest-value rule is generally valid, even if the index “max” is not spe
37、cified in thedesignation. The last sentence is not applied. Section 5.4 Measuring uncertaintyThis section is modified as follows:In order to determine whether the measured values conform to the specifications, they are tobe compared with the specified limit values, taking into consideration the meas
38、uring uncer-tainty according to the specifications in ISO 14253-1. Section 6.2 Roughness characteristicsThis section is not applied. Section 7.2.1 Procedure for non-periodic roughness profileInstead of the mean width RSm of the R - profile in the whole section is placed the mean widthPSm of the P -
39、profile.NOTE: To estimate and fix the sampling length and the cut off length for periodic profiles onlyPSm can be used. RSm is not adapted, because an estimation must be done with the unfil-tered P - profile. Section 7.2.2 Procedure for periodic roughness profileInstead of the mean width RSm of the R - profile in the whole section is placed the mean widthPSm of the P - profile. Appendix A.3 Testing by measuringSections A.3.1 and A.3.2 are not applied.
