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1、BRITISH STANDARD BS EN ISO 17653:2003 Destructive tests on welds in metallic materials Torsion test of resistance spot welds The European Standard EN ISO 17653:2003 has the status of a British Standard ICS 25.160.40 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Un
2、controlled Copy, (c) BSI BS EN ISO 17653:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 March 2003 BSI 20 March 2003 ISBN 0 580 41433 7 National foreword This British Standard is the official English language version of EN ISO 17653:
3、2003. It is identical with ISO 17653:2003. The UK participation in its preparation was entrusted to Technical Committee WEE/2, Welding tests, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The Briti
4、sh Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Onli
5、ne. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsib
6、le international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover,
7、the EN ISO title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled
8、Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17653 March 2003 ICS 25.160.40 English version Destructive tests on welds in metallic materials - Torsion test of resistance spot welds (ISO 17653:2003) Essais destructifs des soudures sur matriaux mtalliques - Essai de torsion d
9、e soudures par rsistance par points (ISO 17653:2003) Zestrende Prfung von Schweiverbindungen an metallischen Werkstoffen - Torsionsversuch an Widerstandspunktschweiungen (ISO 17653:2003) This European Standard was approved by CEN on 21 November 2002. CEN members are bound to comply with the CEN/CENE
10、LEC Internal Regulations which 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 Management Centre or to any CEN
11、 member. This European 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 Management Centre has the same status as the official versions. CEN memb
12、ers are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZA
13、TION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17653:2003 E Licensed Copy: sheffieldun sheffieldun,
14、na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Specimens4 5Testing equipment and testing procedure5 5.1Manual torsion test using a pair of tongs (workshop test) .5 5.2Instrum
15、ented torsion test6 5.2.1Manual twisting6 5.2.2Mechanized torsion test7 6Evaluation of test results7 7Test report 7 Annex A (informative) Additional information9 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 3 Forewor
16、d This document (EN ISO 17653:2003) has been prepared by Technical Committee CEN/TC 121, “Welding“, the secretariat of which is held by DS, in collaboration with ISO/TC 44 “Welding and allied processes“. This European Standard shall be given the status of a national standard, either by publication o
17、f an identical text or by endorsement, at the latest by September 2003, and conflicting national standards shall be withdrawn at the latest by September 2003. In this European Standard annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of
18、the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and the United Kingdom.
19、Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 4 1Scope This European Standard is applicable to spot welded test specimens with single sheet thicknesses ranging from 0,5 mm to 3,0 mm in steels. It may be used for non-f
20、errous materials in certain circumstances, see annex A. The aim of this test is to determine the influence of different steel types, welding parameters and other factors on the deformation characteristics of a spot weld. Using this test, it is possible to determine the weld diameter and the fracture
21、 type from fractured specimens. Additionally, the maximum torsion moment (torque) and the corresponding torsion angle can be determined. 2Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited a
22、t 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 or revision. For undated references the latest edition of
23、 the publication referred to applies (including amendments). prEN ISO 14329:1999, Welding Destructive testing of welds Failure types and geometric measurements for resistance spot, seam, and projection welds (ISO/DIS 14329:1999). 3Terms and definitions For the purposes of this European Standard, the
24、 terms and definitions given in prEN ISO 14329:1999 apply. 4Specimens Specimens for torsion testing are welded individually. In the case of the non-instrumented torsion test, the minimum distance of the spot weld from the edge shall be greater than 10 mm. When using an instrumented torsion device, t
25、he minimum distance shall be 20 mm. The specimen dimensions shall be adjusted to the test equipment but shall be adequate to ensure test specimen rigidity (see Figure 1). The spot weld shall be located in the centre of the test specimen (see 5.2.2). Licensed Copy: sheffieldun sheffieldun, na, Sun No
26、v 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 5 Dimensions in millimetres Key r1distance from the edge to the centre of the spot weld r2distance from the edge to the centre of the spot weld tmaterial thickness (0,5 mm to 3,0 mm) a)specimens for non instrumental torsi
27、on test Non-instrumented b)recommended specimen dimensions for instrumented torsion test using a torsion device (manual or mechanized) Figure 1 Specimens 5Testing equipment and testing procedure 5.1Manual torsion test using a pair of tongs (workshop test) For this test, the lower sheet of the specim
28、en is gripped using a specimen gripper similar to that shown in Figure 2. This can be subsequently clamped in a vice. The upper sheet of the specimen is held in a pair of tongs and twisted continuously in one direction until rupture of the spot weld. Bending of the two sheets of the specimen shall b
29、e avoided during testing in order to maintain pure torsional loading at the spot weld. This is essential if the test results are to be comparable. This test method only allows weld diameter and fracture type to be determined. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00
30、2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 6 Key 1 Specimen 2 Specimen gripper 3 Torque bar 4 Strain gauge 5 Strain gauge amplifier 6 Potentiometer for measuring the torsion angle 7 X-Y-recorder Figure 2 Measuring equipment 5.2Instrumented torsion test 5.2.1Manual twisting The device use
31、d for this variant of torsion test shall be constructed in such a way that the clearance between the edge of the specimen and the tooling shall not exceed 0,3 mm. Positioning of the specimen shall be arranged in such a way that the interface between the two sheets corresponds to the torsional plane
32、of the device and shims, or an adjusting mechanism, may be used for this purpose. Twisting of the specimen shall be possible without tilting or interference between the specimen sheets or the parts of the tooling. The torsion moment is imposed manually via a lever arm on the rotating part of the tes
33、ting device (upper part). During testing, the lever arm shall be moved manually at a slow and steady rate of about 90 in 5 s. Torsion moment and torsion angle are measured during testing using measuring equipment as shown in Figure 2 for example. Permanent records may be made using suitable instrume
34、ntation, for example an X-Y recorder. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 7 5.2.2Mechanized torsion test In this variant of the torsion test, the torsion moment is imposed by an electric or electro-hydraulic
35、 drive. A steady torsional speed, approximately 90 per 5 s, is recommended. Measurement of the torsion moment and torsion angle is carried out using procedures, described in 5.2.1. When using either manual or mechanical torsion test procedure the centre of electrode indentation shall not deviate by
36、more than 1,0 mm from the torsional axis of the torsion device (see annex A). 6Evaluation of test results A torsion moment torsion angle curve is used to determine the maximum torsion moment and the corresponding torsion angle, see figure 3. Key ATorsion moment Mt BTorsion angle Figure 3 Measuring v
37、alues of the torsion test in the torsion moment torsion angle curve The fracture type for the welds shall be evaluated from the fractured specimens, see prEN ISO 14329. Torsion moment, torsion angle and fracture type are dependent on the sheet thickness, the weld diameter and the mechanical characte
38、ristics of the weld metal, heat-affected zone, and parent metal (see annex A). The weld diameter shall be determined on the fractured specimen as mean weld diameter. 7Test report The test report shall refer to this standard and include at least the following information: a) welding equipment; b) wel
39、ding conditions; c) designation of the materials and sheet thicknesses; d) weld diameter “d“; Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 17653:2003 (E) 8 e) maximum torsion moment and corresponding torsion angle; f) fracture type
40、, appearance of the fracture surface (spatter or weld splash, pores, lack of fusion); g) details of the test procedure and measuring equipment used; h) and deviations from this standard. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO
41、 17653:2003 (E) 9 Annex A (informative) Additional information In the case of an interface or a partial plug failure, the diameter of the weld nugget can be difficult to establish reliably as a solid phase bonded or stuck area can give a smeared surface appearance. A spot may be made between non-fer
42、rous materials loaded in pure torsion with fixed centre of torsion, provided that the centre of the spot weld is concentric with the centre of torsion of the testing device. Increasing the distance of the centre of the spot weld from the torsional axis from 0,5 mm to 1,0 mm had no significant influe
43、nce on the mean measured values but the coefficients of variation increased by the factor of 2 to 4. When testing spot welds made in aluminium alloys it is necessary to take into account the following: a larger minimum sheet thickness is required for low strength aluminium alloys; the period between
44、 welding and testing may influence the test result in the case of age-hardenable aluminium alloys; interface failures are common in aluminium alloys; when testing highly ductile materials, a torsion angle of 360 may occur without fracture of the joint. Licensed Copy: sheffieldun sheffieldun, na, Sun
45、 Nov 19 09:20:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 17653:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the inte
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