1、November 2014 Translation by DIN-Sprachendienst.English price group 5No 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).IC
2、S 77.040.10!%=fG“2266736www.din.deDDIN ISO 7802Metallic materials Wire Wrapping test (ISO 7802:2013),English translation of DIN ISO 7802:2014-11Metallische Werkstoffe Draht Wickelversuch (ISO 7802:2013),Englische bersetzung von DIN ISO 7802:2014-11Matriaux mtalliques Fils Essai denroulement (ISO 780
3、2:2013),Traduction anglaise de DIN ISO 7802:2014-11SupersedesDIN ISO 7802:2008-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 4 pages10.14 DIN ISO 7802:2014-11 2 A comma is used as the decimal marker. Contents Page National foreword
4、.2 1 Scope .3 2 Principle .3 3 Test equipment .3 4 Procedure 3 5 Test report .3 DIN ISO 7802:2014-11 3 National foreword The text of ISO 7802:2013 has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” (Secretariat: JISC, Japan). The responsible German body involved in it
5、s preparation was the DIN-Normenausschuss Stahldraht und Stahldrahterzeugnisse (DIN Standards Committee Steel Wire and Wire Products), Working Committee NA 099-00-01 AA Stahldraht. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. D
6、IN and/or DKE shall not be held responsible for identifying any or all such patent rights. Amendments This standard differs from DIN ISO 7802:2008-10 as follows: a) the standard has been brought in line with the current rules of presentation. Previous editions DIN 51215: 1968-07, 1975-09 DIN ISO 780
7、2: 2008-10 1 ScopeThis International Standard specifies a method for determining the ability of metallic wire of diameter or thickness 0,1 mm to 10 mm inclusive, to undergo plastic deformation during wrapping.2 PrincipleThe wrapping test consists of winding a wire to a specified number of turns arou
8、nd a mandrel of the diameter specified in the relevant standard to form a closely wrapped helix.It may also include a specified sequence of winding and unwinding, or even rewinding.3 Test equipmentThe testing machine shall be constructed so the wire can be wound around the mandrel in a helix so that
9、 adjacent wraps of the coil are in contact. A piece of the wire to be tested may be used as the mandrel, provided it is of the specified mandrel diameter and of sufficient hardness.4 Procedure4.1 In general, the test is carried out at ambient temperature between 10 C and 35 C. Tests carried out unde
10、r controlled conditions shall be made at a temperature of 23 C 5 C.4.2 Without applying any torsion, wind the wire in a helix tightly around the mandrel at a constant rate not exceeding 1 wrap per second so that the adjacent wraps of the coil are in contact. If necessary, reduce the rate of wrapping
11、 to ensure that the heat generated does not affect the result of the test.4.3 To ensure tight winding, a tensile stress not exceeding 5 % of the nominal tensile strength of the wire may be applied during winding.4.4 When unwinding, or unwinding and rewinding, are specified, the rate shall be suffici
12、ently slow to prevent any rise of temperature likely to affect the result of the test. At the end of the unwinding, at least one turn shall not be unwound.4.5 The interpretation of the wrapping test is carried out according to the requirements of the relevant Standard. When these requirements are no
13、t specified, absence of cracks visible without the use of magnifying aids is considered as sufficient evidence that the test piece withstood the test. Wire with a thickness or diameter less than 0,5 mm shall be examined with approximately 10-times magnification.5 Test reportThe test report shall inc
14、lude the following information:a) a reference to this International Standard;b) identification of the test piece (type of material, type of coating, etc.);c) diameter or thickness of the test piece;Metallic materials Wire Wrapping testd) diameter of the mandrel;e) test conditions (number of turns, or the wound length);f)test result.DIN ISO 7802:2014-114
