1、 STDeBSI BS EN LbbS-ENGL 1797 Lb24bb7 Ob2L84b 5b0 m BRITISH STANDARD Aluminium and aluminium alloys - Test methods - Earing test for sheet and strip The European Standard EN 1669 : 1996 has the status of a British Standard ICs 77.150.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRI
2、GHT LAW zztxW5- BS EN 1669 : 1997 BS EN 1669 : 1997 Amd. No. This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1997 Date Text affected O BSI 1997 Committees respon
3、sible for this British Standard The preparation of this British Standard was entrusted to Technical Committee NFE/35, Light metals and their alloys, upon which the following bodies were represented + 1 Aluminium Federation Aluminium Stockholders Association Association of Light Alloy Refhem Limited
4、Magnesium Industry Council Ministsy of Defence The foiiowing BSI references relate to the work on this standard Committee reference NFEB5 Draft for comment 9417713476 DC ISBN O 680 27139 O I I STD-BSI BS EN Lbb7-ENGL 1777 = LbZLIbb7 Ob218LiB 333 BS EN 1669 : 1997 Contents Committees responsible page
5、 Inside hnt cover National foreword ii Foreword 2 Text of EN 1669 3 O BSI 1997 1 STD-BSI BS EN LbbS-ENGL L777 E Lb24bb7 Ob2LBLi9 27T W BS EN 1669 : 1997 National foreword This British Standard has been prepared by Technical Committee NFE1I36 and is the English language version of EN 1669 : 1996 Alum
6、inium and duminium alloys - Test methods - Earing test for sheet and strip, published by the European Committee for Standardization (CEN). Cross-references Publications referred to IS0 468 IS0 6507-1 Compliance with a British Standard does not of itself confer immunity from legal obligations. Corres
7、ponding British Standards BS 1134 Assessment of suylime texture Part 1: 1988 Methods and instrumentation BS EN 23878 : 1993 Hardmetads. Viclcers hardness test Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN titie page, pages 2 to 8, an inside bac
8、k cover and a back cover, ii O EtSI 1997 STD-BSI BS EN IbbS-ENGL 1797 lb2Ybb Ob21850 TL W EUROPEAN STANDARD EN 1669 NORME l3UROPEE”E EUROP- NOFM September 1996 ICs 77.120.10; 77.140.90 Descriptors: Aluminium, aluminium alloys, metal plates, steel strips, tests, cupping, determination, height Enghsh
9、version Aluminium and aluminium alloys - W methods - Earrng test for sheet and strip Aluminium et alliages daluminium - Mthodes dessai - Mesure de lindice de cornes lemboutissage pour les tles et les bandes Aluminium und Aluminiumlegierungen - PrfVerfahren - ZipfelprUfmg an Blechen und Bandem This E
10、uropean Standard was approved by CEN on 1996-29. CEN members are bound to comply with the CENKENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a naonai standard without any aiteration. Uptodate lists and bibliographical references concerning s
11、uch national standards may be obtained on applicaiion to the Ceniml Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). Aversion in any other ianguage made by translation under the responsibility of a CEN member into its own language
12、and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Gemy, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United K
13、uigdom. CEN European Committee for Standardkation Comit Europen de Normalisation Europisches Komitee fur Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CEN members Ref. No. EN 1669 : 1996 E I STD-BSI BS EN LbbS-ENGL 1997 m Zb2iibb9 ObZL85L 928 W I Page
14、2 I EN 1669 : 1996 Foreword This European Standard has been prepared by the Technical Committee CENITC 132, Aluminium and aluminium alloys, the Secretariat of which is held by AFNOR. This European Standard shaii be given the status of a national standard, either by publication of an identical text o
15、r by endorsement, at the latest by March 1997, and conflicting national standards shall be withrawn at the latest by March 1997. Within its programme of work, Technical Committee CENAC 132 entrusted CENAC 1WG 7, Sheet, strip and plate, to prepare the following standara EN 1669 Aluminium and aluminiu
16、m alloys - Test methods - Earing test for sheet and strip According to the CENKENELEC hted ReguMons, the national standars organizations of the following countx-ies are bound to implement this European Standard Austria, Belgium, Denmark, Fhdand, France, Gem Greece, Iceland, I*, Luxembourg, Netherlan
17、ds, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword 1 Scope 2 Nomiative references 3 Symbols and designations 4 Frinciple 6 Testingequipment 6 Testpiece 7 Procedure 8 Interpretation of results 9 Test documentation Annexes A (normative) Recommended punch and B (
18、normative) Alternative method for die dimensions dcuiahg earing height page 2 3 3 3 3 3 4 4 5 5 6 7 O BSI 1997 STI)*BSI BS EN IbbS-ENGL L997 II Lb2rlbbS Ob2L852 Bbli Page 3 EN 1669 : 1996 3 Symbols and designations I The synibois and designations used in the earing test are specified in figures 1 an
19、d 2 and in table 1. 1 scope This European Standad specifies the method for determining the ear height of sheet and strip of nominal thickneses from 0,oS mm to 6 mm after deep drawing. tpn - bs 2, 2 Normative references This European standard incorporates by dated or undated reference, provisions Com
20、 other publications. These normave references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment
21、or revision. For undated references the laest edition of the publication referred to applies. IS0 468 Suvme roughness - Pammh, their values and general rules for spec 0,5 pm for thicknesses over 0,45 mm up to 1,25 mm; 1,0 pm for thicknesses over 1,25 mm. able 1. Symbols and designations 2 hem S, Sym
22、boll Designation I Unit a I Thickness of the test Diece mm Mean height of ear expressed in % percentage Mean height of ear at xx“ to the rolling mm direction Mean height of ear at xxo to the roling % direction expressed in percentage Ra 4 Principle Drawing of cylindricai cups from circular blanks ta
23、ken from metallic sheet and strip and evaluation of the height of any earing produced by this process. Surface roughness parameter arithmetical mean deviation of the Drofile 5 Ibsting equipment 6.1 The arrangement for the test equipment is given in figure 1. The punch shall be capable of moving dong
24、 the axial centreiine of the die, blankholder and circular blank. The equipment shail be such that ironing of ears due to the blankholder force and/or due to the insuffcient clearance between the punch and die is avoided and so that the cup can be removed without damghg the em. 6.2 The machine shall
25、 be capable of controing the speed of drawing and the blankholder force. 6.3 The machine shail be equipped with a device for locating the circular blank concentrically with the axial line of the machine. NOTE. The device for concentrically locating the blank is not required if the circular blank is
26、produced as a part of the cup forming process. 6.4 The combinations of the punch and die diameters shail be chosen, in relation to the nominal sheet thickness, such that the clearance between punch and die (Le. v, see figure 1) is at least 1,15 times the nominal sheet thickness and not more than 1,8
27、 times the nomind sheet thickness. I I EI 1 Diameter of the punch mm G$, =90mmwhend1=5mm. For a test series or comparative tests the same drawing ratio shall be maintained in all cases. 6.2 The test piece shall be free of burrs on the edges which would interfere with the test. 7 Procedure 7.1 In gen
28、eral, the test shaii be carried out at ambient temperature within the limits of 10 OC to 35 OC. In case of dispute, a temperature range of (23 f 5) OC should be agreed upon between purchaser and supplier 7.2 Select the appropriate punch and die in accordance with 6.4 and A.2. 7.3 Before testing coat
29、 the two faces of the test piece lightly and uniformiy with an appropriate lubricant (tallow is frequently used). NOTE. Test results depend on the type and quantity of lubricant used. In case of dispute, lubrication conditions should be discussed between purchaser and supplier. O BSI 1997 Page 5 EN
30、1669 : 1996 7.4 Locate the circular blank concenlrhlly between the blankholder and the die. Apply the blankholding force that is just sufficient to prevent wrinkling of the flange (see 6.1). 9 “ b) earing percentage 2 according to 8.2 (or as per annex B when agreed); c) orientation of the domhant ea
31、ring system when specified. 9.2 Additional information Testing shall be carried out according to written procedures which shaii include: a) reference to this -dar* b) diameter of the circular blank dependmg on thickness; c) diameter of the punch depending on thickness; d) diameter of the die dependi
32、ng on thickness; e) blankholder force; f) type of lubricant; g) punch speed the latter formuia being more appropriate in the case of a cup that is not perfectly symmetrical. O BSI 1997 Annex A (normative) Recommended punch and die dimensions A.l A punch diameter of 33 mm is found acceptable up to a
33、sheet thickness of about 3 mm. For higher sheet thicknesses it is recommended to use a 50 mm diameter punch in order to get a well formed cup. A.2 The clearance between punch and die may have some influence on the result of the test, depending also on the other test parametem The range of clearance
34、ratio from 1,15 to 1,8 is generally considered too iarge to obtain consistent results. Therefore when comparing test results hm different laboratories, this parameter should be taken into account. 33700 m,00 m,00 50900 Although no consensus has been achieved on a more restricted range, the benefits
35、of a standardized set of dies has been recognized and use of the dies listed in table A. 1 is therefore recommended. Table Al also gives for convenience, for two restricted ranges of clearance ratio, a possible relationship between sheet thickness and die diameter. 41,20 5 40 2,901 3,500 2,401 3,000
36、 59,m 10 40 3,501 4,100 3,001 3,500 61,M 10 40 4,101 5,000 3,501 4,400 64740 10 170 5,001 6,OoO 4,401 5,300 Table A.l Recommended punch and die dimensions Dimensions in miiiimetres Diameter Inside diameter Inside Maximum Thickness of test material . radius of die roughness of die corner surface a Cl
37、earance ratio 1,16 to 1$2 Clearance ratio 1,34 to 1,76 4 Rz Raw from I UPto from up to 33,55 33,67 33.00 33.80 295 275 2.5 295 2.5 0,121 0,101 0,125 0,151 O, 126 0,157 O, 186 0,235 o, 158 O, 195 0,236 0,280 O, 196 0,240 o. 1 0.241 0,290 I 0-1 10,346 10,435 10,291 10,360 I 5 5 5 5 5 0,670 0,671 0,941
38、 1,130 0,801 1,131 1,250 0.5 1,451 1,900 1,251 1,600 O BSI 1997 STD*BSI BS EN Lbby-ENGL 1797 E Lb2qbb7 Ob2185b 9OT Page 7 EN 1669 : 1996 Annex B (normative) Alternative method for calculating earing height B.l The calculation method described in clause 8 B.3 Mean peak heights shall be calculated for
39、 each occurring peak system as follows: hpo + hvl80 - $o= 2 gives a mean earing percentage. When a more detailed - 5 hp135 + b225 + b315 description of the earing system is required the method described in this annex shall be used, unless a simplified method has been agreed upon in writmg between pu
40、rchaser and supplier. $45 =b 4 , b90 + kt1270 - $90 - 2 B.2 Earing peaks may occur at O“, 45“ (appro- angle) or 90“ to the rolling directionl). Since the rolling process imparts to the sheet symmetries with respect to the longitudinal and long transverse directions, these peaks wi occur as sets of t
41、wo or four. Taking an axis parailel to the rolling direction as origin for angle measurements, each peak on the periphery of the cup is identified by an angie between O“ and 360“. The different possible sets will therefore consist of the following peaks: P1: 0“and 180“; p3: 45“, 135“, 225“ and 315“;
42、 P5 !Nand 270“. Correspondmglx valleys may occur at any of the following anges: V1: 0“and 180“; V2 22,5“, 157,5“, 202,5“ and 337,5“; V3: 45“, 135“, 225“ and 315“; V4 67,5“, 112,5“, 247,6“ and 292,5“; V5 9O“and 270“. B.4 Mean dey heights shail be calculated for each occurring dey system as follows: -
43、 hv22,5 - hu22,5 + hv157.5 hu202,5 + b7,5 4 - 9 - h7,5 -k hu112,5 + hv247,5 hu292,5 hv67,5 = 4 3 B.6 Mean earing height, heo, he45 and hego shall be measured, for each occurfing peak system, by reference to the deepest dey system as indid in table B. 1. B.6 Mean height of ears shall be expressed in
44、percentage for each occurring peak system as: so x loo, E h s45 =: he45 x loo, where: - h is the mean cup height as defined in 8.2. ln some special cases peaks may occur at intermediate angles; the calculation steps shall then be adapted accordingly. 0 BSI 1997 STD-BSI BS EN Lbby-ENGL 1977 E lb2qbb7
45、 Ob21857 34b Page 8 EN1669:1996 1.3 I O ,2 I Ij 4 II ai La ni Q ni O c- ni I - I W - I - 9 - I - E 8 *z IP I 9 s: u5 a O BSI 1997 STDoBSI BS EN Ibb-ENGL I917 1b2LibbS Ob21858 282 m BS EN 1669 : 1997 List of references See donai foreword O BSI 1997 BS EN 1669 : 1997 STD-BSI BE EN Lbb9-ENGL 1777 8 Lb2
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