1、November 2015 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 29.030; 77.140.50!%G(N“2360543w
2、ww.din.deDIN EN 10251Magnetic materials Methods of determination of the geometrical characteristics of electrical steel sheet and strip;English version EN 10251:2015,English translation of DIN EN 10251:2015-11Magnetische Werkstoffe Verfahren zur Bestimmung der geometrischen Kenngren von Elektroblech
3、 und -band;Englische Fassung EN 10251:2015,Englische bersetzung von DIN EN 10251:2015-11Matriaux magntiques Mthodes de dtermination des caractristiques gomtrique des tles lectriques en acier;Version anglaise EN 10251:2015,Traduction anglaise de DIN EN 10251:2015-11SupersedesDIN EN 10251:1997-02www.b
4、euth.deDDocument comprises 15 pages10.15Translation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.DIN EN 10251:2015-11 2 A comma is used as the decimal marker. National foreword This document (EN 10251:2015) has been prepared by Technical Comm
5、ittee ECISS/TC 108 “Steel sheet and strip for electrical applications” (Secretariat: DIN, Germany) of the European Committee for Iron and Steel Standardization (ECISS). The responsible German bodies involved in its preparation were the DIN-Normenausschuss Eisen und Stahl (DIN Standards Committee Iro
6、n and Steel) and the DKE Deutsche Kommission Elektrotechnik Elektronik Informationstechnik im DIN und VDE (German Commission for Electrical, Electronic and Information Technologies of DIN and VDE), Joint Working Committee NA 021-00-07 GA Elektroblech. Amendments This standard differs from DIN EN 102
7、51:1997-02 as follows: a) normative references have been updated; b) the description of the measuring procedure of the deviation from the shearing line due to internal stresses in 4.4.1 has been revised; c) the figures and the corresponding keys have been revised. Previous editions DIN 50642: 1955-0
8、5, 1975-06 DIN IEC 60404-9: 1989-05 DIN EN 10251: 1997-02 EN 10251August 2015ICS 29.030; 77.140.50 Supersedes EN 10251:1997English Version Magnetic materials - Methods of determination of thegeometrical characteristics of electrical steel sheet and strip Matriaux magntiques - Mthodes de dtermination
9、 des caractristiques gomtrique des tles lectriques en acierMagnetische Werkstoffe - Verfahren zur Bestimmung dergeometrischen Kenngren von Elektroblech und -band This European Standard was approved by CEN on 23 July 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whic
10、h stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This Eur
11、opean Standard exists in three official versions (English, 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members a
12、re the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, R
13、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10251:2015 EEUROPEAN COMMITTEE
14、 FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContents PageEuropean foreword .3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Test Methods 5 4.1 Flatness 5 4.1.1 Test specimen 5 4.1.2 Measuring procedu
15、re 5 4.2 Residual curvature.5 4.2.1 Test specimen 5 4.2.2 Measuring procedure 5 4.3 Edge camber 5 4.3.1 Test specimen 5 4.3.2 Measuring procedure 5 4.4 Deviation from the shearing line due to internal stresses 5 4.4.1 Test specimen 5 4.4.2 Measuring procedure 5 4.5 Burr height 6 4.5.1 Test specimen
16、6 4.5.2 Measuring procedure 6 5 Test report 6 Bibliography . 13 DIN EN 10251:2015-11 EN 10251:2015 (E) 2European foreword This document (EN 10251:2015) has been prepared by Technical Committee ECISS/TC 108 “Steel sheet and strip for electrical applications”, the secretariat of which is held by DIN.
17、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 February 2016, and conflicting national standards shall be withdrawn at the latest by February 2016. Attention is drawn to the possibility that some
18、 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. This document supersedes EN 10251:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of th
19、e following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl
20、ands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 10251:2015-11EN 10251:2015 (E)31 Scope This European Standard is intended to define the test methods used for the determination of the following geometrical characteristics
21、of electrical steel sheet and strip: flatness; residual curvature; edge camber; deviation from the shearing line due to internal stresses; burr height of cut edges. This European Standard applies to electrical steel sheet and strip intended for the construction of magnetic circuits and corresponding
22、 to Clauses B2, C21 and C22 of IEC 60404-1:2000. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 flatness (wave factor) property of a sheet or length of strip which is characterized by the wave factor, i
23、.e. by the relation of the height of the wave to its length Note 1 to entry: For examples of waves, see Figure 1. 3.2 residual curvature permanent curvature in the direction of rolling of an unwound strip 3.3 edge camber greatest distance between a longitudinal edge of the sheet and the line joining
24、 the two ends of the measured section corresponding to this edge Note 1 to entry: See Figure 3. 3.4 deviation from the shearing line due to internal stresses greatest distance between corresponding points on the two cut edges of a sheet cut longitudinally Note 1 to entry: See Figure 4. 3.5 burr heig
25、ht difference between the thicknesses measured respectively at the cut edge of the sheet and at a distance of 10 mm from this edge Note 1 to entry: See Figure 5. DIN EN 10251:2015-11 EN 10251:2015 (E) 44 Test Methods 4.1 Flatness 4.1.1 Test specimen The test specimen shall consist of a sheet or a le
26、ngth of strip, the size of which is defined in the product standard. 4.1.2 Measuring procedure The test specimen shall be placed on a surface table sufficiently large that the specimen does not overhang the edges. It shall then be lifted up on one edge and allowed to fall back. The height of the max
27、imum wave (h) and the length of the wave (l) shall be measured with a rule graduated in millimetres (see Figure 2). 4.2 Residual curvature 4.2.1 Test specimen The test specimen shall consist of a sample 500 mm in length and of width equal to the delivered width of the sheet or strip. The axis of the
28、 test specimen shall be parallel to the direction of rolling of the sheet or strip. 4.2.2 Measuring procedure The test shall consist of placing the test specimen vertically against a supporting plate. The top of the test specimen shall be held against the supporting plate over a height of 30 mm with
29、 its convex surface facing the plate. The distance (a) between the bottom edge of the test specimen and the supporting plate shall then be measured at the axis of the test specimen (see Figure 6). The clamping force shall be sufficient to allow the full width of the test specimen to be in contact wi
30、th the support (see in Figures 7 and 8 examples of clamping systems). 4.3 Edge camber 4.3.1 Test specimen The test specimen shall consist of a sheet or a length of strip, the size of which is defined in the product standard. 4.3.2 Measuring procedure The test specimen shall be placed on a surface ta
31、ble. A rule shall be placed in contact with the extremities of the concave side and the maximum gap (e) between the edge and the rule shall be measured. 4.4 Deviation from the shearing line due to internal stresses 4.4.1 Test specimen The test specimen shall consist of a sheet or a length of strip,
32、the size of which is defined in the product standard. 4.4.2 Measuring procedure The test specimen shall be split along the central axis (middle of the width) in longitudinal direction. The two parts, neither of which shall be turned over, shall be weighted so that they remain flat. The two cut edges
33、 shall then be brought together again so as to give the smallest gap. The maximum distance (c) between the two cut edges shall be measured. DIN EN 10251:2015-11EN 10251:2015 (E)54.5 Burr height 4.5.1 Test specimen The test specimen shall consist of a sheet or a length of strip, the size of which is
34、defined in the product standard. The effective length for the measurement shall be 1 m. 4.5.2 Measuring procedure The burr height shall be determined by using a linear measuring device such as a comparator. The device shall have the following characteristics: resolution : 1 m; uncertainty : 2 m; axi
35、al movement of the sliding anvil shall be obtained without rotation; dimension of the sliding anvil : 16 mm x 8 mm; applied force on the sliding anvil : 4 N 0,2 N. The test specimen shall be held flat on a surface table. The linear measuring device shall be rigidly fixed on a stand so that the movem
36、ent of the anvil is perpendicular to the table (see Figure 9). The surface of contact of the sliding anvil shall be parallel to the surface table. The verification of this parallelism can be made using a thickness of the sample. The difference in the distance from any point on the surface of the sup
37、porting table shall not exceed 2 m. A three point adjusting surface table is necessary. The test shall consist of measuring the thickness of the sheet at 10 mm from the cut edge (h1) and the thickness of the cut edge (h2), the sliding anvil having its larger dimension (16 mm) parallel to the cut edg
38、e (see Figure 10). A measurement shall be made every 50 mm, by moving the test specimen, the burr height being characterized by the mean value of the 20 measurements and by the indication of the maximum value obtained. It is permissible to cut the test specimen into lengths of at least 50 mm or mult
39、iples of 50 mm. If this is done, the cuts shall be made so that the burrs are on the same side of the sheet as the burr which is to be measured. During the measurements, the temperature shall be constant. 5 Test report The test report, when requested, shall contain the following as appropriate: a) r
40、eference to this European Standard; b) type and designation of the magnetic steel sheet tested; c) one or more of the following, depending on the requirements of the product standard: 1) length (l) of wave in millimetres, to the nearest 10 mm, height (h) of wave in millimetres, to the nearest 1 mm a
41、nd wave factor (w) in percent, to the nearest 0,1 %; DIN EN 10251:2015-11 EN 10251:2015 (E) 62) deviation (a) in millimetres characterizing the residual curvature, to the nearest 1 mm; 3) variation (c) from the shearing line in millimetres, to the nearest 0,1 mm; 4) distance (e) in millimetres chara
42、cterizing the edge camber, to the nearest 0,1 mm; 5) arithmetic mean value and maximum value of burr height. Key 1 surface table 2 sheet 3 rolling direction h height of wave (mm) l length of wave (mm) Figure 1 Example of wave Figure 2 Wave factor DIN EN 10251:2015-11EN 10251:2015 (E)7Figure 3 Verifi
43、cation of the edge camber a) convex gap b) concave gap Key a rolling direction Figure 4 Deviation from the shearing line due to internal stresses Dimensions in millimetres Figure 5 Burr height (h) Explanation to Figure 5: h= h2-h1DIN EN 10251:2015-11 EN 10251:2015 (E) 8Dimensions in millimetres Key
44、1 graduated rule 2 test specimen 3 clamping device 4 supporting plate Figure 6 Measuring device DIN EN 10251:2015-11EN 10251:2015 (E)9Key 1 fixed support 2 clamping device 3 test specimen Figure 7 Example of clamping system (Type A) DIN EN 10251:2015-11 EN 10251:2015 (E) 10Key 1 eccentric Figure 8 E
45、xample of clamping system (Type B) DIN EN 10251:2015-11EN 10251:2015 (E)11Key 1 supporting base 2 test specimen supporting table 3 test specimen 4 moving anvil 5 linear measuring device Figure 9 System for measuring burr height Dimensions in millimetres Key 1 test specimen 2 movement direction of the test specimen 3 anvil Figure 10 Position of the moving anvil DIN EN 10251:2015-11 EN 10251:2015 (E) 12Bibliography IEC 60404-1:2000, Magnetic materials Part 1: Classification DIN EN 10251:2015-11EN 10251:2015 (E)13
