1、STD.BSI BS EN IS0 14744-5-ENGL 2001 1b24bb C BRITISH STANDARD Welding - Acceptance inspection of electron beam welding machines - Part 5: Measurement of run-out accuracy The European Standard EN IS0 14744-52000 has the stahis of a British Standard ICs 25.160.30 02884 122 BS EN IS0 14744-5:2001 NO CO
2、PYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN IS0 L4744-5-ENGL 200L LbE“ibb7 0702885 Ob9 BS EN IS0 14744-52001 Amd. No. This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Stan
3、dards Committee and comes into effect on 15 April 2001 Date Comments O BSI 04-2001 ISBN O 580 34194 1 National foreword This British Standard is the official English language version of EN IS0 14744-52000. It is identical with IS0 14744-52000. The UK participation in its preparation was entrusted to
4、 Technical Committee WEW47, Msceheous welding standards, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor
5、related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Stanards normaiy include an annex which lists normati
6、ve references to intemational publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by u
7、sing the “Find” facility of the BSI Standards Elecx-onic Catalogue. A British Standard does not purport to include all the necescary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immuni
8、ty from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, pages 2 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued STD-ES1 ES EN IS0 14744-5-ENGL 2001 D 16246
9、69 0902886 TT5 W EUROPEAN STANDARD EN IS0 14744-5 NORME EUROPENNE EUROPISCHE NORM April 2000 ICs 25.1 60.00 English version Welding - Acceptance inspection of electron beam welding machines - Part 5: Measurement of run-out accuracy (IS0 14744-512000) Soudage - Essais de rception des machines de soud
10、age par faisceau dlectrons - Partie 5: Mesure de la prcision gomtrique (IS0 14744-52000) Schweien - Abnahmeprfung von Elektronenstrahl- Schweimaschinen - Teil 5: Messen der Fhrungsgenauigkeit (IS0 14744-5:2000) This European Standard was approved by CEN on 3 January 2000. CEN members are bound to co
11、mply with the CENKENELEC 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 Central Se
12、cretariat or to any CEN 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 Central Secretariat has the same status as the of
13、ficial versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMIITEE FOR STANDARDIZATION COM
14、ITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 14744-52000 E . STD-BSI BS EN IS0 14744-5-ENGL 2001 Lh
15、24bb9 0902887 931 D Page 2 EN IS0 14744-5:2000 Contents Foreword . 1 Scope 2 Normative references . 3 Terms and definitions 4 Test arrangement and procedure 4.1 General . 4.3 Instruments and instructions for their use . 5 Evaluation of measurements . 4.2 Scope of measurement Page . 3 . 4 . 4 . 4 . 4
16、 . 4 . 4 . 4 . 5 Page 3 STD-BSI BS EN IS0 14744-5-ENGL 2001 W Lb2Libb7 0702888 878 W EN IS0 14744-5:2000 Foreword The text of EN IS0 14744-5:2000 has been prepared by Technical Committee CENTC 121 “Welding, the secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 “
17、Welding and allied processes“. 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 October 2000, and conflicting national standards shall be withdrawn at the latest by October 2000. According to the C
18、ENEENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Swede
19、n, Switzerland and the United Kingdom. This draft European Standard is composed of the six following parts: - Part 1: Principles and acceptance conditions; - Part 2: Measurement of accelerating voltage characteristics; - Part 3: Measurement of beam current characteristics; - Part 4: Measurement of w
20、elding speed; - Part 5: Measurement of run-out accuracy; - Pari 6: Measurement of stability of spot position. STD-BSI BS EN IS0 L4744-5-ENGL 2OOL W Lb2qbh9 0702889 704 Page 4 EN IS0 14744-5:2000 1 Scope This standard is intended for use when the run-out accuracy of the moving parts of electron beam
21、welding machines complying with EN IS0 14744-1 is to be measured in connection with an acceptance inspection. It provides information on the procedure and apparatus to be used for making the measurements. Given the great variety of electron beam welding machines, the scope of measurements required f
22、or acceptance inspection purposes should be specified separately for the machine concerned. Run-out accuracy as defined here is a systematic error and thus counts as one of the parameters by which the performance of a machine tool can be characterized. Other factors influencing performance (e.g. dyn
23、amic forces, vacuum level, positioning accuracy of CNC machines) and methods of statistical evaluation are not covered in this standard. Electron beam welding involves movement of the workpiece and/or of the electron gun. Successful welding presupposes that this movement is effected by the devices c
24、oncerned (e.g. work table and rotating fixture) with a given degree of accuracy. The purpose of the measurement is thus to check whether and to what extent the required run-out accuracy is maintained. 2 Normative references This European Standard incorporates by dated or undated reference, provision
25、s from other publications. These normative 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 am
26、endment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN IS0 14744-1 12000 Welding - Acceptance inspection of electron beam welding machines - Part 1 : Principles and acceptance conditions (IS0 14744-1 : 2000) 3 Terms and defini
27、tions For the purposes of this European Standard, the following term and definition applies, 3.1 Run-out accuracy maximum deviation measured within the work space used for welding at right angles to the direction of feed in the X, Y and Z directions, or, in the case of rotation of the workpiece, by
28、the axial and radial run-out. NOTE Run-out accuracy is also a function of the deviation of the actual spot position from the desired position in the beam axis, referred to the weld point on the workpiece surface, in so far as this deviation is due to the positioning devices. The run-out of each indi
29、vidual axis shall be measured to provide a guide to the overall run-out accuracy of the beam relative to the joint axis. In cases where a number of axes operate together during welding, special measurement procedures should be specified. 4 Test arrangement and procedures 4.1 General Unless otherwise
30、 specified, acceptance testing of run-out accuracy is normally performed with a vented work chamber. 4.2 Scope of measurement Measurements shall be made in all significant directions and axes under the loading conditions specified in 6.4 of EN IS0 14744-1 :2000. 4.3 Instruments and instructions for
31、their use Measurements shall be made with instruments, such as mechanical instruments, optical instruments (laser instrument) or inductive displacement transducers, permitting measurements to be made with an accuracy corresponding to the limiting values specified in EN IS0 14744-1. The response time
32、 of the measurement instrument shall be compatible with the feed rate of the positioning device. STD-BSI BS EN IS0 L4744-5-ENGL 2001 = Lb24bb9 0902890 426 Pane 5 EN IS0 14744-5:sOOO Table 1 provides recommendations of the apparatus and procedures which may be used when measuring the run- out accurac
33、y of the work table or of the electron gun movement and the rotating fixture. In any case, the measurement procedures and limit deviations have to be agreed and specified. In cases where the electron gun moves in both X and Y directions, measurements in the 2 direction will also be necessary as thes
34、e permit the parallelism between the XY-plane of the electron gun movement and the XY-plane of the work table to be checked. In the case of rotating fixtures it should also be noted that, in cases where the rotational axis is horizontal, the run- out accuracy is not only influenced by the maximum pe
35、rmissible workpiece loading but also by the tilting moment and by any unequal distribution of the mass. 5 Evaluation of measurements The deviations established by measurement shall be compared with the limiting values specified in EN IS0 14744-1. UN ;I C O u .- c E i5 .E Cu C 3 o c 2 c & Y7 STD-BSI
36、BS EN IS0 1474g-5-ENGL 2001 Lb2Ybb7 0902872 2T7 m Page 7 EN IS0 14744-5:2000 o) o, 3 9, - m 0 . . . . . . . . . “1 Page 8 EN IS0 14744-52000 al EN IS0 14744-5:2000 - 8 8 a, 3 c E .- c v - - STDeBSI BS EN IS0 14744-5-ENGL 2DOL = 1624667 0702875 TO8 m Page 10 EN IS0 14744-5:2000 O N o O cv Page 11 STD
37、-BSI BS EN IS0 14744-5-ENGL 2001 Lb24bb9 090289b 944 EN IS0 14744-5:2000 h U o) U 3 U C O o - Y F al n is I I I BS EN IS0 14744-52001 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It pres
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