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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 14744-5:2001 Th
2、e European Standard EN ISO 14744-5:2000 has the status of a British Standard ICS 25.160.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Welding Acceptance inspection of electron beam welding machines Part 5: Measurement of run-out accuracy Licensed Copy: sheffieldun sheffie
3、ldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 2001 BSI 04-2001 ISBN 0 580 341
4、94 1 BS EN ISO 14744-5:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN ISO 14744-5:2000. It is identical with ISO 14744-5:2000. The UK participation in its preparation was entrusted to Technical Comm
5、ittee WEE/47, Miscellaneous 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 related internat
6、ional 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 Standards normally include an annex which lists normative references
7、to international 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 using the Find f
8、acility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obl
9、igations. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:1
10、9:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14744-5 April 2000 ICS 25.160.00 English version Welding - Acceptance inspection of electron beam welding machines - Part 5: Measurement of run-out accuracy (ISO 14744-5:2000) Soudage - Essais de
11、 rception des machines de soudage par faisceau dlectrons - Partie 5: Mesure de la prcision gomtrique (ISO 14744-5:2000) Schweien - Abnahmeprfung von Elektronenstrahl- Schweimaschinen - Teil 5: Messen der Fhrungsgenauigkeit (ISO 14744-5:2000) This European Standard was approved by CEN on 3 January 20
12、00. CEN members are bound to comply with the CEN/CENELEC 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
13、on application to the Central Secretariat 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 Secretari
14、at has the same status as the official 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 C
15、OMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14744-5:2000 E Licensed Cop
16、y: sheffieldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN ISO 14744-5:2000 Contents Page Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1Scope . . .
17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3Terms and definitions . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4Test arrangement and procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4.2Scope of measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4.3Instruments and instructions for their use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . .4 5Evaluation of measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN ISO 14744-5:2000 Foreword The text
21、 of EN ISO 14744-5:2000 has been prepared by Technical Committee CEN/TC 121 “Welding“, the secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes“. This European Standard shall be given the status of a national standard, either by public
22、ation 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 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement
23、this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This draft European Standard is composed of the six following parts: Part 1: Pri
24、nciples and acceptance conditions; Part 2: Measurement of accelerating voltage characteristics; Part 3: Measurement of beam current characteristics; Part 4: Measurement of welding speed; Part 5: Measurement of run-out accuracy; Part 6: Measurement of stability of spot position. Licensed Copy: sheffi
25、eldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN ISO 14744-5:2000 1 Scope This standard is intended for use when the run-out accuracy of the moving parts of electron beam welding machines complying with EN ISO 14744-1 is to be measured in connection wit
26、h 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 for acceptance inspection purposes should be specified separately for the machine c
27、oncerned. 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. dynamic forces, vacuum level, positioning accuracy of CNC machines) and methods of st
28、atistical 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 concerned (e.g. work table and rotating fixture) with a given degree of accuracy. T
29、he 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, provisions from other publications. These normative references are cited at the appropriate
30、 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 the publication
31、referred to applies (including amendments). EN ISO 14744-1:2000 Welding Acceptance inspection of electron beam welding machines Part 1: Principles and acceptance conditions (ISO 14744-1 : 2000) 3 Terms and definitions For the purposes of this European Standard, the following term and definition appl
32、ies, 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 the axial and radial run-out. NOTE Run-out accuracy is also a function of the deviation
33、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 individual axis shall be measured to provide a guide to the overall run-out accuracy of the
34、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 specified, acceptance testing of run-out accuracy is normally performed with a vented w
35、ork 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 ISO 14744-1:2000. 4.3 Instruments and instructions for their use Measurements shall be made with instruments, such as mechanical instruments, op
36、tical instruments (laser instrument) or inductive displacement transducers, permitting measurements to be made with an accuracy corresponding to the limiting values specified in EN ISO 14744-1. The response time of the measurement instrument shall be compatible with the feed rate of the positioning
37、device. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN ISO 14744-5:2000 Table 1 provides recommendations of the apparatus and procedures which may be used when measuring the run- out accuracy of the work table or of the electron g
38、un 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 Z direction will also be necessary as these permit the parallelism between the XY-
39、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 permissible workpiece loading but also by
40、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 ISO 14744-1. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled
41、Copy, (c) BSI Table 1 - Examples of set-ups for measuring the run-out accuracy of the work table, electron gun, or rotating fixture NoObjectDiagramEquipmentProcedure 1Straightness of the X(Y) direction of work table movement in Y(X) direction Key 1 Straightedge 2 Dial gauge 3 XY - work table Straigh
42、tedge Dial gauge Position straightedge in x(y) direction (e.g. by aligning it with the reference slot of table) and attach dial gauge. Traverse table through entire feed length in the X direction and measure deviations in Y direction, ay. Then traverse table through entire feed length in the Y direc
43、tion and measure deviations in X direction, ax. 2Straightness of the X(Y) direction of work table movement in Z direction Straightedge Dial gauge Set straightedge at position 1 and mount dial gauge. Traverse table through entire feed length in the X(Y) direction and measure deviation in Z direction,
44、 az. Repeat measurement with straightedge set at position 2. 3Straightness of the X(Y) direction of electron gun movement in Y(X) direction Key 1 Electron gun Straightedge Dial gauge Position straightedge in X(Y) direction (e.g. by aligning it with the reference slot of table) and attach dial gauge.
45、 Traverse electron gun through entire feed length in the X direction and measure deviations in Y direction, ay. Then traverse electron gun through entire feed length in the Y direction and measure deviations in X direction, ax. (continued) Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:19
46、:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Table 1 (continued) NoObjectDiagramEquipmentProcedure 4Straightness of the X(Y) direction of electron gun movement in Z direction Straightedge Dial gauge Set straightedge at position 1 and mount dial gauge. Traverse electron gun through entire feed leng
47、th in the X(Y) direction and measure deviation in Z direction, az. Repeat measurement with straightedge set at position 2. 5Parallelism of the XY-plane of electron gun movement to the X(Y) direction of the work table movement Dial gaugePosition electron gun at the 4 corner points and centre of the w
48、ork table. Maintain electron gun in all positions on the same Z-coordinates and measure deviations in Z direction, az. (continued) Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:19:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Table 1 (continued) NoObjectDiagramEquipmentProcedure 6Squaren
49、ess of movement of work table in X and Y directions Steel square Dial gauge Place steel square with one leg in X direction of the work table movement. Traverse work table in Y direction and measure deviations from squareness in the X direction along the square. 7Squareness of electron gun movement in X and Y directions Steel square Dial gauge Place steel square with one leg in X direction of the electron gun movement. Traverse in electron gun in Y direction and measure deviations from squareness in the X direction along the square. (continued)
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