1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58p
2、rofiles in alloys EN AW-6060 and EN AW-6063 Part 2: Tolerances on dimensions and formICS 77.150.10Aluminium and aluminium alloys Extruded precision BRITISH STANDARDBS EN 12020-2:2008BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIT
3、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 55566 4Amendments/corrigenda issued since publicationDate Commentscontract. Users are responsible for its correct application.Compliance with a British Standa
4、rd cannot confer immunity from legal obligations. National forewordThis British Standard is the UK implementation of EN 12020-2:2008. It supersedes BS EN 12020-2:2001 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys
5、.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12020-2March 2008ICS 77.150.10 Supersedes EN 12020-2:2001 English Versio
6、nAluminium and aluminium alloys - Extruded precision profiles inalloys EN AW-6060 and EN AW-6063 - Part 2: Tolerances ondimensions and formAluminium et alliages daluminium - Profils de prcisionfils en alliages EN AW-6060 et EN AW-6063 - Partie 2:Tolrances sur dimensions et formeAluminium und Alumini
7、umlegierungen - StranggepresstePrzisionsprofile aus Legierungen EN AW-6060 und ENAW-6063 - Teil 2: Grenzabmae und FormtoleranzenThis European Standard was approved by CEN on 10 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
8、giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official ve
9、rsions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium,
10、 Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDA
11、RDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12020-2:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHI
12、NA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 2 Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Tolerances on dimensions. 5 3.1 General. 5 3.2 Cross-sectional dimensions 5 3.2.1 General. 5 3.2.2 Tolerances on dimensions other than wall thickness 6 3
13、.2.3 Tolerances on wall thickness of solid and hollow profiles 6 3.3 Length 7 3.4 Squareness of cut ends . 8 3.5 Length offset for profiles with a thermal barrier 8 4 Tolerances on form. 8 4.1 Plane parallelism. 8 4.2 Straightness 9 4.3 Convexity-Concavity 10 4.4 Contour 11 4.5 Twist. 12 4.6 Angular
14、ity 13 4.7 Corner and fillet radii 15 Bibliography . 16 BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 3 Foreword This document (EN 12020-2:2008) has been prepared by Technical Committee CEN/TC 132 “Aluminium a
15、nd aluminium alloys”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest
16、 by September 2008. This document supersedes EN 12020-2:2001. Within its programme of work, Technical committee CEN/TC 132 entrusted CEN/TC 132/WG 5 “Extruded and drawn products“ to revise EN 12020-2:2001 The following technical modifications have been introduced during the revision: Clause 1: The m
17、aximum diameter of the circumscribing circle CD is increased to 350 mm Subclause 3.2.3, Table 2: The tolerances on wall thickness of solid and hollow profiles have been modified Subclause 4.1: Requirements to plane parallelism is included Subclause 4.4, Table 6: Requirements to contour tolerances ha
18、ve been modified Subclause 4.5, Table 7: Requirements to twist tolerances have been modified EN 12020 comprises the following parts under the general title “Aluminium and aluminium alloys Extruded precision profiles in alloys EN AW-6060 and EN AW-6063“: Part 1: Technical conditions for inspection an
19、d delivery Part 2: Tolerances on dimensions and form Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. CEN/TC 132 affirms it is its poli
20、cy that in the case when a patentee refuses to grant licenses on standardized standards products under reasonable and not discriminatory conditions then this product shall be removed from the corresponding standard. According to the CEN/CENELEC Internal Regulations, the national standards organizati
21、ons of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania
22、, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 4 1 Scope This document specifies tolerances on dimensions and form of extruded precision
23、profiles, in alloys EN AW-6060 and EN AW-6063 manufactured with and without a thermal barrier (see Figures 1 and 2). It applies to extruded products supplied without further surface treatment. Precision profiles covered in this standard are distinguished from extruded profiles for general applicatio
24、ns covered in EN 755-9 by the following characteristics: they are mainly for architectural applications; they meet more stringent requirements regarding the surface condition of visible surfaces; the maximum diameter of the circumscribing circle CD is 350 mm; they are made to closer tolerances on di
25、mensions and form. In the case of profiles which, due to the complexity of their design, are difficult to manufacture and specify, then special agreements between supplier and purchaser may need to be reached. NOTE The effect of the thermal barrier material on the dimensional tolerances is covered b
26、y this document although the actual thermal barrier material itself is not (see EN 14024). Key 1 CD maximum 350 mm Key 1 CD maximum 350 mm 2 thermal barriers Figure 1 Profile without thermal barrier Figure 2 Profile containing thermal barrier 2 Normative references The following referenced documents
27、 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) applies. BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 0
28、2:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 5 EN ISO 1101, Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out (ISO 1101:2004) 3 Tolerances on dimensions 3.1 General If, for compelling reasons, tolerances closer than those sp
29、ecified in 3.2.1 and 3.2.2 are required, these shall only be specified for dimensions that are critical to the function, subject to specific agreement between supplier and purchaser. Any such reduction shall not exceed two-thirds of the values specified in this standard and is subject to a minimum t
30、olerance band of 0,3 mm. 3.2 Cross-sectional dimensions 3.2.1 General The tolerances of the following dimensions (see Figure 3) are specified in Tables 1 and 2. A: wall thicknesses except those enclosing the hollow spaces in hollow profiles; B: wall thicknesses enclosing the hollow spaces in hollow
31、profiles, except those between two hollow spaces; C: wall thicknesses between two hollow spaces in hollow profiles; E: the length of the shorter leg of profiles with open ends; H: all dimensions (except wall thickness) between points on the cross section of the profile or the centres of open screw h
32、oles, including open ends. Figure 3 Definition of dimensions A, B, C, E, H BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 6 3.2.2 Tolerances on dimensions other than wall thickness The tolerances for dimension
33、H shall be as specified in Table 1. Table 1 Tolerances on cross-sectional dimensions Dimensions in millimetres Dimension H Tolerances on H (open ends) Over Up to and including Tolerances on H (except open ends) E 60 60 10 000 - 100 +5 0 +7 0 +1 0 0 100 200 +7 0 +9 0 +12 0 200 350 +8 0 + 1 1 0 +14 0
34、Subject to agreement between supplier and purchaser If no fixed or minimum length is specified in the order, profiles may be delivered in random lengths. The length range and the tolerances on the random lengths shall be subject to agreement between supplier and purchaser. BS EN 12020-2:2008Licensed
35、 Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 8 3.4 Squareness of cut ends The squareness of cut ends shall be within half of the fixed length tolerance range specified in Table 3 for both fixed and random lengths, e.g. for a fixed len
36、gth tolerance of 10 0 +mm the deviation from squareness of cut ends shall be within 5 mm measured over all the complete cross sectional width of the profile. 3.5 Length offset for profiles with a thermal barrier Length offset K, see Figure 4, for profiles with a thermal barrier shall be within the t
37、olerance range for the fixed length specified in Table 2, e.g. for a fixed length tolerance of 10 0 +mm the length offset shall be within 10 mm. Key 1 length of profile 2 profile 1 3 thermal barrier 4 profile 2 Figure 4 Length offset K 4 Tolerances on form 4.1 Plane parallelism Requirements on plane
38、 parallelism / of opposite outer planes shall be subject of agreement between supplier and purchaser and shall be specified on the drawing. Plane parallelism shall be marked on the drawing as specified in Figure 5, using the / symbol as in EN ISO 1101. Tolerances on plane parallelism shall not incre
39、ase tolerances on dimensions, i.e. shall always lie within dimensional tolerances or tolerance ranges. Where outer planes are of unequal length, the longer one shall be taken as contact reference. Two clearly defined reference points shall specify the width of the plane parallelism measurement. The
40、tolerance on plane parallelism / shall be in accordance with the tolerance ranges given in Table 1 for outer parallel dimensions H (including those for open ends) and apply for only cross sectional measurements in a single plane. BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARD
41、S, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 9 Requirements in the figure (/, 0,4) is an example only. Tolerances to be according to Table 1: Figure 5 Marking plane parallelism for convex and concave surfaces 4.2 Straightness Deviations from straightness, hsand ht, shall be mea
42、sured as shown in Figure 6 with the profile placed on a horizontal base plate so that its mass decreases the deviation. The straightness tolerance htshall be as specified in Table 4. The local deviation from straightness hsshall not exceed 0,3 mm per 300 mm length. Key 1 base plate 2 straight edge F
43、igure 6 Measurement of deviation from straightness BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 10 Table 4 Straightness tolerances Dimensions in millimetres Straightness tolerance htfor specified length L L 1
44、 000 1 000 6 0000,7 1,3 1,8 2,2 2,6 3,0 3,5 4.3 Convexity-Concavity The convexity-concavity f shall be measured as shown in Figures 7 and 8. The tolerances shall be as specified in Table 5. Key W = width f = deviation W1= 100 mm f1= local deviation per any 100 mm Figure 7 Measurement of convexity co
45、ncavity for hollow section BS EN 12020-2:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 11 Key 1 base plate W = width f = deviation W1= 100 mm f1= local deviation per any 100 mm Figure 8 Measurement of convexityconcavity for
46、 open section Table 5 Convexity-concavity tolerances Dimensions in millimetres Width W Over Up to and including Maximum allowable deviation f - 30 0,20 30 60 0,30 60 100 0,40 100 150 0,50 150 200 0,70 200 250 0,85 250 300 1,0 300 350 1,2 In the case of profiles with a width W of over 150 mm, the loc
47、al deviation f1shall not exceed 0,50 mm for any width W1of 100 mm. 4.4 Contour For profiles with curved cross sections, the deviation at any point of the curve, from the theoretically exact line as defined by the drawing shall not be greater than the appropriate tolerance C specified in Table 6. Con
48、sidering all points on the curve, a tolerance zone shall be defined as the zone between two envelopes running tangentially to all circles of diameter C which can be drawn with their centres lying along the theoretically exact line; this is shown in Figure 9. BS EN 12020-2:2008Licensed Copy: Wang Bin
49、, ISO/EXCHANGE CHINA STANDARDS, 22/07/2008 02:59, Uncontrolled Copy, (c) BSIEN 12020-2:2008 (E) 12 Figure 9 Definition of contour tolerances Table 6 Contour tolerances Dimensions in millimetres Width W of the contour Contour tolerance = Over Up to and including Diameter C of the tolerance circle - 30 0,30 30 60 0,50 60 90 0,70 90 120 1,00 120 150 1,20 150 200 1,50 200 250 2,00 250 300 2,50 300 350 3,00 NOTE Contour tolerances can be checked by placing a section of the profile on a scale projec
